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Jeriffa De Clercq
Department of Materials Textiles and Chemical Engineering (MaTCh) Ghent University Valentin Vaerwyckweg 1 9000 Ghent Belgium

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Full paper
Published: 05 August 2021 in ChemistryOpen
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Lignin valorization and particularly its depolymerization into bio-aromatics, has emerged as an important research topic within green chemistry. However, screening of catalysts and reaction conditions within this field is strongly constrained by the lack of analytical techniques that allow for fast and detailed mapping of the product pools. This analytical gap results from the inherent product pool complexity and the focus of the state-of-the-art on monomers and dimers, overlooking the larger oligomers. In this work, this gap is bridged through the development of a quasi-orthogonal GPC-HPLC-UV/VIS method that is able to separate the bio-aromatics according to molecular weight (hydrodynamic volume) and polarity. The method is evaluated using model compounds and real lignin depolymerization samples. The resulting color plots provide a powerful graphical tool to rapidly assess differences in reaction selectivity towards monomers and dimers as well as to identify differences in the oligomers.

ACS Style

Tibo De Saegher; Jeroen Lauwaert; Joeri Vercammen; Kevin M. Van Geem; Jeriffa De Clercq; An Verberckmoes. Fast screening of Depolymerized Lignin Samples Through 2D‐Liquid Chromatography Mapping. ChemistryOpen 2021, 10, 740 -747.

AMA Style

Tibo De Saegher, Jeroen Lauwaert, Joeri Vercammen, Kevin M. Van Geem, Jeriffa De Clercq, An Verberckmoes. Fast screening of Depolymerized Lignin Samples Through 2D‐Liquid Chromatography Mapping. ChemistryOpen. 2021; 10 (8):740-747.

Chicago/Turabian Style

Tibo De Saegher; Jeroen Lauwaert; Joeri Vercammen; Kevin M. Van Geem; Jeriffa De Clercq; An Verberckmoes. 2021. "Fast screening of Depolymerized Lignin Samples Through 2D‐Liquid Chromatography Mapping." ChemistryOpen 10, no. 8: 740-747.

Research article
Published: 04 June 2021 in ACS Omega
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There is an increasing urge to make the transition toward biobased materials. Lignin, originating from lignocellulosic biomass, can be potentially valorized as humic acid (HA) adsorbents via lignin-based mesoporous carbon (MC). In this work, these materials were synthesized for the first time starting from modified lignin as the carbon precursor, using the soft-template methodology. The use of a novel synthetic approach, Claisen rearrangement of propargylated lignin, and a variety of surfactant templates (Pluronic, Kraton, and Solsperse) have been demonstrated to tune the properties of the resulting MCs. The obtained materials showed tunable properties (BET surface area: 95–367 m2/g, pore size: 3.3–36.6 nm, VBJH pore volume: 0.05–0.33 m3/g, and carbon and oxygen content: 55.5–91.1 and 3.0–12.2%, respectively) and good performance in terms of one of the highest HA adsorption capacities reported for carbon adsorbents (up to 175 mg/g).

ACS Style

Monika A. Jedrzejczyk; Julian Engelhardt; Marko R. Djokic; Vitaliy Bliznuk; Kevin M. Van Geem; An Verberckmoes; Jeriffa De Clercq; Katrien V. Bernaerts. Development of Lignin-Based Mesoporous Carbons for the Adsorption of Humic Acid. ACS Omega 2021, 6, 15222 -15235.

AMA Style

Monika A. Jedrzejczyk, Julian Engelhardt, Marko R. Djokic, Vitaliy Bliznuk, Kevin M. Van Geem, An Verberckmoes, Jeriffa De Clercq, Katrien V. Bernaerts. Development of Lignin-Based Mesoporous Carbons for the Adsorption of Humic Acid. ACS Omega. 2021; 6 (23):15222-15235.

Chicago/Turabian Style

Monika A. Jedrzejczyk; Julian Engelhardt; Marko R. Djokic; Vitaliy Bliznuk; Kevin M. Van Geem; An Verberckmoes; Jeriffa De Clercq; Katrien V. Bernaerts. 2021. "Development of Lignin-Based Mesoporous Carbons for the Adsorption of Humic Acid." ACS Omega 6, no. 23: 15222-15235.

Review article
Published: 15 December 2020 in ACS Sustainable Chemistry & Engineering
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The utilization of lignin and glyoxal as potentially sustainable and less hazardous building blocks for phenolic resins is an emerging research field. Lignin thereby serves as a partial, macromolecular substitute for phenol, while glyoxal fulfills the role of an aldehyde cross-linker. In the first part of this perspective, the industrial context of lignin and glyoxal will be expounded with a focus on their origin and production processes. In the framework of phenolic resins, the use of lignin and glyoxal can be categorized into two research domains: (i) glyoxalation to improve the reactivity of lignin prior to resin synthesis and (ii) direct resin synthesis using lignin and glyoxal with glyoxal immediately serving as the cross-linker. This perspective provides a comprehensive overview of the progress made in both domains, pinpointing the opportunities, blind spots, and challenges that lay ahead.

ACS Style

Ine Van Nieuwenhove; Tom Renders; Jeroen Lauwaert; Tony De Roo; Jeriffa De Clercq; An Verberckmoes. Biobased Resins Using Lignin and Glyoxal. ACS Sustainable Chemistry & Engineering 2020, 8, 18789 -18809.

AMA Style

Ine Van Nieuwenhove, Tom Renders, Jeroen Lauwaert, Tony De Roo, Jeriffa De Clercq, An Verberckmoes. Biobased Resins Using Lignin and Glyoxal. ACS Sustainable Chemistry & Engineering. 2020; 8 (51):18789-18809.

Chicago/Turabian Style

Ine Van Nieuwenhove; Tom Renders; Jeroen Lauwaert; Tony De Roo; Jeriffa De Clercq; An Verberckmoes. 2020. "Biobased Resins Using Lignin and Glyoxal." ACS Sustainable Chemistry & Engineering 8, no. 51: 18789-18809.

Research article
Published: 10 December 2020 in Industrial & Engineering Chemistry Research
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Resins are interesting catalysts for organic reactions, which are characterized by a remarkable swelling behavior upon exposure to liquids, typically resulting in selective sorption in the case of mixtures. Hence, when constructing kinetic models for reactions catalyzed by such resins, the component partitioning between the bulk liquid and polymer liquid and its effect on their thermodynamic activities have to be properly taken into account. A kinetic model is developed for acidic resin-catalyzed esterification, while comparing two scenarios for capturing the thermodynamics within the resin pores. For the specific case study on a single resin with a specific solvent, compensation effects between the calculated thermodynamic activities in the resin and the estimated rate coefficients render only minor performance differences between the two scenarios. Still, aiming at extending the scope toward other solvents and/or resins, it is deemed crucial to explicitly account for the resin’s selective sorption and swelling behavior.

ACS Style

Jeroen Lauwaert; Evelien Van De Steene; Pieter Vermeir; Jeriffa De Clercq; Joris W. Thybaut. Critical Assessment of the Thermodynamics in Acidic Resin-Catalyzed Esterifications. Industrial & Engineering Chemistry Research 2020, 59, 22079 -22091.

AMA Style

Jeroen Lauwaert, Evelien Van De Steene, Pieter Vermeir, Jeriffa De Clercq, Joris W. Thybaut. Critical Assessment of the Thermodynamics in Acidic Resin-Catalyzed Esterifications. Industrial & Engineering Chemistry Research. 2020; 59 (51):22079-22091.

Chicago/Turabian Style

Jeroen Lauwaert; Evelien Van De Steene; Pieter Vermeir; Jeriffa De Clercq; Joris W. Thybaut. 2020. "Critical Assessment of the Thermodynamics in Acidic Resin-Catalyzed Esterifications." Industrial & Engineering Chemistry Research 59, no. 51: 22079-22091.

Review article
Published: 09 July 2020 in Reaction Chemistry & Engineering
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A walk-through of nanoparticle–reactant/product, nanoparticle–support and support–reactant/product interaction effects on the catalytic performance of heterogeneous palladium catalysts in liquid-phase reactions.

ACS Style

Beau Van Vaerenbergh; Jeroen Lauwaert; Pieter Vermeir; Joris W. Thybaut; Jeriffa De Clercq. Towards high-performance heterogeneous palladium nanoparticle catalysts for sustainable liquid-phase reactions. Reaction Chemistry & Engineering 2020, 5, 1556 -1618.

AMA Style

Beau Van Vaerenbergh, Jeroen Lauwaert, Pieter Vermeir, Joris W. Thybaut, Jeriffa De Clercq. Towards high-performance heterogeneous palladium nanoparticle catalysts for sustainable liquid-phase reactions. Reaction Chemistry & Engineering. 2020; 5 (9):1556-1618.

Chicago/Turabian Style

Beau Van Vaerenbergh; Jeroen Lauwaert; Pieter Vermeir; Joris W. Thybaut; Jeriffa De Clercq. 2020. "Towards high-performance heterogeneous palladium nanoparticle catalysts for sustainable liquid-phase reactions." Reaction Chemistry & Engineering 5, no. 9: 1556-1618.

Journal article
Published: 09 December 2019 in Chemical Engineering Research and Design
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The potential of squalene recovery from oil deodorizer distillates (ODD) via a combination of supercritical ethanol esterification, supercritical CO2-extraction and additional purification was assessed via detailed process simulations. The squalene yields and purity from olive, sunflower and soybean ODD were determined. The highest squalene yield and purity could be achieved starting from olive ODD (95 gsqualene kg−1ODD, 99 wt% pure), followed by soybean ODD (31 gsqualene kg−1ODD, 98 wt% pure) and sunflower ODD (24 gsqualene kg−1ODD, 98 wt% pure). Apart from squalene, two more value-added products can be produced, i.e., high purity ethyl esters (>88 wt%) and a mixture of tocopherols and sterols. On a scale of 1 kTonneODD per year, all feedstocks demonstrate economical potential in Europe. Even more, a flexible process configuration could be designed which is suitable for the treatment of the different feedstocks.

ACS Style

Alexandra Bouriakova; Pedro S.F. Mendes; Kathy Elst; Jeriffa De Clercq; Joris W. Thybaut. Techno-economic evaluation of squalene recovery from oil deodorizer distillates. Chemical Engineering Research and Design 2019, 154, 122 -134.

AMA Style

Alexandra Bouriakova, Pedro S.F. Mendes, Kathy Elst, Jeriffa De Clercq, Joris W. Thybaut. Techno-economic evaluation of squalene recovery from oil deodorizer distillates. Chemical Engineering Research and Design. 2019; 154 ():122-134.

Chicago/Turabian Style

Alexandra Bouriakova; Pedro S.F. Mendes; Kathy Elst; Jeriffa De Clercq; Joris W. Thybaut. 2019. "Techno-economic evaluation of squalene recovery from oil deodorizer distillates." Chemical Engineering Research and Design 154, no. : 122-134.

Journal article
Published: 08 September 2019 in Catalysts
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A packed-bed plug-flow reactor, denoted as the lab-scale liquid-solid (LS)² reactor, has been developed for the assessment of heterogeneous catalyst deactivation in liquid-phase reactions. The possibility to measure intrinsic kinetics was first verified with the model transesterification of ethyl acetate with methanol, catalyzed by the stable commercial resin Lewatit K2629, for which a turnover frequency (TOF) of 6.2 ± 0.4 × 10−3 s−1 was obtained. The absence of temperature and concentration gradients was verified with correlations and experimental tests. The potential for assessing the deactivation of a catalyst was demonstrated by a second intrinsic kinetics evaluation where a methylaminopropyl (MAP)-functionalized mesoporous silica catalyst was used for the aldol reaction of acetone with 4-nitrobenzaldehyde in different solvents. The cooperative MAP catalyst deactivated as a function of time on stream when using hexane as solvent. Yet, the monofunctional MAP catalyst exhibited stable activity for at least 4 h on stream, which resulted in a TOF of 1.2 ± 0.1 × 10−3 s−1. It did, however, deactivate with dry acetone or DMSO as solvent due to the formation of site-blocking species. This deactivation was mitigated by co-feeding 2 wt % of water to DMSO, resulting in stable catalyst activity.

ACS Style

Anton De Vylder; Jeroen Lauwaert; Stijn Van Auwenis; Jeriffa De Clercq; Joris W. Thybaut. Catalyst Stability Assessment in a Lab-Scale Liquid-Solid (LS)² Plug-Flow Reactor. Catalysts 2019, 9, 755 .

AMA Style

Anton De Vylder, Jeroen Lauwaert, Stijn Van Auwenis, Jeriffa De Clercq, Joris W. Thybaut. Catalyst Stability Assessment in a Lab-Scale Liquid-Solid (LS)² Plug-Flow Reactor. Catalysts. 2019; 9 (9):755.

Chicago/Turabian Style

Anton De Vylder; Jeroen Lauwaert; Stijn Van Auwenis; Jeriffa De Clercq; Joris W. Thybaut. 2019. "Catalyst Stability Assessment in a Lab-Scale Liquid-Solid (LS)² Plug-Flow Reactor." Catalysts 9, no. 9: 755.

Paper
Published: 29 August 2019 in Reaction Chemistry & Engineering
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The reaction rate and stability of chitosan as heterogeneous amine catalyst is quantified in a batch and continuous-flow aldol reaction.

ACS Style

Anton De Vylder; Jeroen Lauwaert; Jeriffa De Clercq; Pascal Van Der Voort; Christian V. Stevens; Joris W. Thybaut. Kinetic evaluation of chitosan-derived catalysts for the aldol reaction in water. Reaction Chemistry & Engineering 2019, 4, 1948 -1956.

AMA Style

Anton De Vylder, Jeroen Lauwaert, Jeriffa De Clercq, Pascal Van Der Voort, Christian V. Stevens, Joris W. Thybaut. Kinetic evaluation of chitosan-derived catalysts for the aldol reaction in water. Reaction Chemistry & Engineering. 2019; 4 (11):1948-1956.

Chicago/Turabian Style

Anton De Vylder; Jeroen Lauwaert; Jeriffa De Clercq; Pascal Van Der Voort; Christian V. Stevens; Joris W. Thybaut. 2019. "Kinetic evaluation of chitosan-derived catalysts for the aldol reaction in water." Reaction Chemistry & Engineering 4, no. 11: 1948-1956.

Journal article
Published: 28 May 2019 in Chemical Engineering Journal
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The Pd leaching behaviour of a strongly acid (Lewatit K2629) versus strongly basic (Lewatit MP500 OH) ion exchange resin supported Pd nanoparticle (Pd-NP) catalyst is elucidated in the Suzuki reaction between iodobenzene and phenylboronic acid with K2CO3 as base in 1:1 (v/v) DMF/H2O at 40°C. Reaction and leaching kinetic analyses combined with hot filtration tests indicated heterogeneous-homogeneous catalysis for both Pd-NP catalysts. More particularly, leaching experiments showed that for Pd-NP Lewatit K2629, Pd-NP as well as molecular Pd2+ leaching (as phenylpalladium(II)hydroxide complexes) occurred due to, respectively, the disturbance of the electrostatic NP stabilization by dissociated K2CO3 and reaction with iodobenzene and hydroxide. For Pd-NP Lewatit MP500 OH, however, molecular Pd2+ leaching induced by iodobenzene, dominates. Hence, the resin functionality determines the contribution of each leaching pathway. Furthermore, at high conversions, Pd re-deposition occurred due to the decreased amount of leaching inducing reagents causing enlarged NPs in the resin which leached less in subsequent runs.

ACS Style

Beau Van Vaerenbergh; Jeroen Lauwaert; Joris Thybaut; Pieter Vermeir; Jeriffa De Clercq. Pd nanoparticle and molecular Pd2+ leaching pathways for a strongly acid versus strongly basic resin supported Pd nanoparticle catalyst in Suzuki coupling. Chemical Engineering Journal 2019, 374, 576 -588.

AMA Style

Beau Van Vaerenbergh, Jeroen Lauwaert, Joris Thybaut, Pieter Vermeir, Jeriffa De Clercq. Pd nanoparticle and molecular Pd2+ leaching pathways for a strongly acid versus strongly basic resin supported Pd nanoparticle catalyst in Suzuki coupling. Chemical Engineering Journal. 2019; 374 ():576-588.

Chicago/Turabian Style

Beau Van Vaerenbergh; Jeroen Lauwaert; Joris Thybaut; Pieter Vermeir; Jeriffa De Clercq. 2019. "Pd nanoparticle and molecular Pd2+ leaching pathways for a strongly acid versus strongly basic resin supported Pd nanoparticle catalyst in Suzuki coupling." Chemical Engineering Journal 374, no. : 576-588.

Journal article
Published: 01 May 2018 in Journal of Catalysis
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The reusability of methylaminopropyl active sites grafted on mesoporous amorphous silica, either with cooperative silanol groups or trimethylsilated, was assessed in the aldol reaction of acetone with 4-nitrobenzaldehyde. Raman, 13C NMR, and UV–Vis spectroscopy demonstrated the presence of stable enamines on the spent catalysts. These enamines are produced as a side product from iminium intermediates in the catalytic cycle. Water co-feeding enhances the desorption of the iminium intermediates and, hence, suppresses the formation of these stable enamine species. The reusability of the cooperative catalyst increased to 70% with co-feeding 0.69 wt% water, while an almost complete reusability was achieved for the trimethylsilated catalyst. Continuous-flow experimentation showed that the cooperative effect of the silanol groups was lost during the first 7 h on-stream, yet activity losses continued, most likely due to silica hydrolysis. Activity losses persisted on the more hydrophobic trimethylsilated catalyst, but were significantly less pronounced.

ACS Style

Anton De Vylder; Jeroen Lauwaert; Dolores Esquivel; Dirk Poelman; Jeriffa De Clercq; Pascal Van Der Voort; Joris W. Thybaut. The role of water in the reusability of aminated silica catalysts for aldol reactions. Journal of Catalysis 2018, 361, 51 -61.

AMA Style

Anton De Vylder, Jeroen Lauwaert, Dolores Esquivel, Dirk Poelman, Jeriffa De Clercq, Pascal Van Der Voort, Joris W. Thybaut. The role of water in the reusability of aminated silica catalysts for aldol reactions. Journal of Catalysis. 2018; 361 ():51-61.

Chicago/Turabian Style

Anton De Vylder; Jeroen Lauwaert; Dolores Esquivel; Dirk Poelman; Jeriffa De Clercq; Pascal Van Der Voort; Joris W. Thybaut. 2018. "The role of water in the reusability of aminated silica catalysts for aldol reactions." Journal of Catalysis 361, no. : 51-61.

Journal article
Published: 22 November 2017 in Applied Catalysis A: General
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An uncalcined HT supported Pd-NP catalyst was synthesized via co-precipitation, i.e., PdHT_100RED_20, and benchmarked against a Pd impregnated HT catalyst, i.e., [email protected]_500RED_20. TEM analysis pointed out that the largest NPs (6.5 nm) were found in the co-precipitated catalyst because of its weaker steric NP confinement, compared to the benchmark catalyst (3.2 nm). The PdHT_100RED_20 had a significantly higher catalytic performance (60% conversion, 1.85% leaching) than [email protected]_500RED_20 (19%, 0.98%) due to lack of calcination resulting in an ordered, and thus, more accessible HT structure in combination with its high support basicity. Both catalysts showed low Pd leaching confirming the suitability of HTs as NP support. Focusing on PdHT_100, the effect of the reduction temperature on the NP size and catalytic performance was investigated. NP size distribution analysis showed that the smallest NPs were found in PdHT_100RED_0 (5.3 nm), resulting in a higher catalytic performance (67%, 2.28%) when compared to PdHT_100RED_20 (6.5 nm). Performing the reduction at higher temperatures, i.e., at 60 °C (5.7 nm), caused an extremely low catalytic performance (13%, 0.20%) due to the less efficient reduction reaction with NaBH4 at higher reduction temperatures. Reusing PdHT_100RED_20, a decrease in catalytic performance (45%) was observed. However, this decrease was less pronounced (50%) when a re-activation of the catalyst with Na2CO3 between consecutive runs was performed. Moreover, it was shown that the leached Pd species were able to re-deposit onto the support if high conversions were obtained, and thus, an almost quantitatively recovery from the reaction mixture can be achieved with retention of its catalytic activity (>99%).

ACS Style

Beau Van Vaerenbergh; Kevin De Vlieger; Kyle Claeys; Gertjan Vanhoutte; Jeriffa De Clercq; Pieter Vermeir; An Verberckmoes. The effect of the hydrotalcite structure and nanoparticle size on the catalytic performance of supported palladium nanoparticle catalysts in Suzuki cross-coupling. Applied Catalysis A: General 2017, 550, 236 -244.

AMA Style

Beau Van Vaerenbergh, Kevin De Vlieger, Kyle Claeys, Gertjan Vanhoutte, Jeriffa De Clercq, Pieter Vermeir, An Verberckmoes. The effect of the hydrotalcite structure and nanoparticle size on the catalytic performance of supported palladium nanoparticle catalysts in Suzuki cross-coupling. Applied Catalysis A: General. 2017; 550 ():236-244.

Chicago/Turabian Style

Beau Van Vaerenbergh; Kevin De Vlieger; Kyle Claeys; Gertjan Vanhoutte; Jeriffa De Clercq; Pieter Vermeir; An Verberckmoes. 2017. "The effect of the hydrotalcite structure and nanoparticle size on the catalytic performance of supported palladium nanoparticle catalysts in Suzuki cross-coupling." Applied Catalysis A: General 550, no. : 236-244.

Journal article
Published: 09 August 2017 in International Journal of Environmental Research and Public Health
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In different regions across the globe, elevated arsenic contents in the groundwater constitute a major health problem. In this work, a biopolymer chitosan has been blended with volcanic rocks (red scoria and pumice) for arsenic (V) removal. The effect of three blending ratios of chitosan and volcanic rocks (1:2, 1:5 and 1:10) on arsenic removal has been studied. The optimal blending ratio was 1:5 (chitosan: volcanic rocks) with maximum adsorption capacity of 0.72 mg/g and 0.71 mg/g for chitosan: red scoria (Ch–Rs) and chitosan: pumice (Ch–Pu), respectively. The experimental adsorption data fitted well a Langmuir isotherm (R2 > 0.99) and followed pseudo-second-order kinetics. The high stability of the materials and their high arsenic (V) removal efficiency (~93%) in a wide pH range (4 to 10) are useful for real field applications. Moreover, the blends could be regenerated using 0.05 M NaOH and used for several cycles without losing their original arsenic removal efficiency. The results of the study demonstrate that chitosan-volcanic rock blends should be further explored as a potential sustainable solution for removal of arsenic (V) from water.

ACS Style

Tsegaye Girma Asere; Stein Mincke; Jeriffa De Clercq; Kim Verbeken; Dejene A. Tessema; Fekadu Fufa; Christian V. Stevens; Gijs Du Laing. Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends. International Journal of Environmental Research and Public Health 2017, 14, 895 .

AMA Style

Tsegaye Girma Asere, Stein Mincke, Jeriffa De Clercq, Kim Verbeken, Dejene A. Tessema, Fekadu Fufa, Christian V. Stevens, Gijs Du Laing. Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends. International Journal of Environmental Research and Public Health. 2017; 14 (8):895.

Chicago/Turabian Style

Tsegaye Girma Asere; Stein Mincke; Jeriffa De Clercq; Kim Verbeken; Dejene A. Tessema; Fekadu Fufa; Christian V. Stevens; Gijs Du Laing. 2017. "Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends." International Journal of Environmental Research and Public Health 14, no. 8: 895.

Journal article
Published: 01 August 2017 in Journal of Hazardous Materials
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Mesoporous MIL-101(Cr) is used as host for a ship-in-a-bottle type adsorbent for selective U(VI) recovery from aqueous environments. The acid-resistant cage-type MOF is built in-situ around N,N-Diisobutyl-2-(octylphenylphosphoryl)acetamide (CMPO), a sterically demanding ligand with high U(VI) affinity. This one-step procedure yields an adsorbent which is an ideal compromise between homogeneous and heterogeneous systems, where the ligand can act freely within the pores of MIL-101, without leaching, while the adsorbent is easy separable and reusable. The adsorbent was characterized by XRD, FTIR spectroscopy, nitrogen adsorption, XRF, ADF-STEM and EDX, to confirm and quantify the successful encapsulation of the CMPO in MIL-101, and the preservation of the host. Adsorption experiments with a central focus on U(VI) recovery were performed. Very high selectivity for U(VI) was observed, while competitive metal adsorption (rare earths, transition metals...) was almost negligible. The adsorption capacity was calculated at 5.32mg U/g (pH 3) and 27.99mg U/g (pH 4), by fitting equilibrium data to the Langmuir model. Adsorption kinetics correlated to the pseudo-second-order model, where more than 95% of maximum uptake is achieved within 375min. The adsorbed U(VI) is easily recovered by desorption in 0.1M HNO. Three adsorption/desorption cycles were performed.

ACS Style

Jeroen De Decker; Karel Folens; Jeriffa De Clercq; Maria Meledina; Gustaaf Van Tendeloo; Gijs Du Laing; Pascal Van Der Voort. Ship-in-a-bottle CMPO in MIL-101(Cr) for selective uranium recovery from aqueous streams through adsorption. Journal of Hazardous Materials 2017, 335, 1 -9.

AMA Style

Jeroen De Decker, Karel Folens, Jeriffa De Clercq, Maria Meledina, Gustaaf Van Tendeloo, Gijs Du Laing, Pascal Van Der Voort. Ship-in-a-bottle CMPO in MIL-101(Cr) for selective uranium recovery from aqueous streams through adsorption. Journal of Hazardous Materials. 2017; 335 ():1-9.

Chicago/Turabian Style

Jeroen De Decker; Karel Folens; Jeriffa De Clercq; Maria Meledina; Gustaaf Van Tendeloo; Gijs Du Laing; Pascal Van Der Voort. 2017. "Ship-in-a-bottle CMPO in MIL-101(Cr) for selective uranium recovery from aqueous streams through adsorption." Journal of Hazardous Materials 335, no. : 1-9.

Research article
Published: 28 June 2017 in Langmuir
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Tunable large pore soft templated mesoporous carbons (SMC) were obtained via the organic self-assembly of resorcinol/formaldehyde with the triblock copolymer F127 and by investigating the effect of carbon precursor to surfactant (p/s) ratio and carbonization temperature on the material characteristics. The p/s ratio and carbonization temperature were varied respectively from 0.83 to 0.25 and from 400 to 1200 °C. The resulting SMCs had various average pore sizes, tunable from 7 up to 50 nm. At lower p/s ratios, the pore size increased, pore size distributions broadened, and pore volumes increased. An increase of hydrophobicity was observed at elevated carbonization temperatures. A 2D hexagonal ordered SMC with a narrow pore size distribution was obtained at a ratio of 0.83. Lower ratios (0.5 and 0.25) transformed into disordered porous carbons containing micropores, mesopores, and even macropores. The SMCs were tested for adsorption of a large organic molecule, humic acid (HA), from water. The material characteristics that significantly affected HA adsorption capacity were pore size and mass % (wt %) carbon. The novel SMCs showed an unprecedented high adsorption of HA in the entire molecular weight distribution range. SMCs with large mesopores resulted in higher maximum adsorption capacities and improved HA adsorption kinetics compared to activated carbon.

ACS Style

Wannes Libbrecht; An Verberckmoes; Joris W. Thybaut; Pascal Van Der Voort; Jeriffa De Clercq. Tunable Large Pore Mesoporous Carbons for the Enhanced Adsorption of Humic Acid. Langmuir 2017, 33, 6769 -6777.

AMA Style

Wannes Libbrecht, An Verberckmoes, Joris W. Thybaut, Pascal Van Der Voort, Jeriffa De Clercq. Tunable Large Pore Mesoporous Carbons for the Enhanced Adsorption of Humic Acid. Langmuir. 2017; 33 (27):6769-6777.

Chicago/Turabian Style

Wannes Libbrecht; An Verberckmoes; Joris W. Thybaut; Pascal Van Der Voort; Jeriffa De Clercq. 2017. "Tunable Large Pore Mesoporous Carbons for the Enhanced Adsorption of Humic Acid." Langmuir 33, no. 27: 6769-6777.

Journal article
Published: 01 May 2017 in Carbon
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ACS Style

Wannes Libbrecht; An Verberckmoes; Joris W. Thybaut; Pascal Van Der Voort; Jeriffa De Clercq. Soft templated mesoporous carbons: Tuning the porosity for the adsorption of large organic pollutants. Carbon 2017, 116, 528 -546.

AMA Style

Wannes Libbrecht, An Verberckmoes, Joris W. Thybaut, Pascal Van Der Voort, Jeriffa De Clercq. Soft templated mesoporous carbons: Tuning the porosity for the adsorption of large organic pollutants. Carbon. 2017; 116 ():528-546.

Chicago/Turabian Style

Wannes Libbrecht; An Verberckmoes; Joris W. Thybaut; Pascal Van Der Voort; Jeriffa De Clercq. 2017. "Soft templated mesoporous carbons: Tuning the porosity for the adsorption of large organic pollutants." Carbon 116, no. : 528-546.

Journal article
Published: 01 January 2017 in Catalysis Communications
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A straightforward procedure to synthesize cysteine functionalized materials with tailored support properties has been developed. It allows tuning the hydrophobicity of the material via the incorporation of aliphatics, aromatics or silica in the framework structure. The aldol condensation of 4-nitrobenzaldehyde and acetone, as a probe reaction for the catalytic activity of the produced materials, exhibited a remarkable interplay between the reactant, solvent, traces of water and support hydrophobicity. A selective enrichment in the catalyst pores of specific bulk phase molecules is believed to be the key to achieve the targeted catalyst performance

ACS Style

Jeroen Lauwaert; Judith Ouwehand; Jeriffa De Clercq; Pegie Cool; Pascal Van Der Voort; Joris W. Thybaut. Tuning component enrichment in amino acid functionalized (organo)silicas. Catalysis Communications 2017, 88, 85 -89.

AMA Style

Jeroen Lauwaert, Judith Ouwehand, Jeriffa De Clercq, Pegie Cool, Pascal Van Der Voort, Joris W. Thybaut. Tuning component enrichment in amino acid functionalized (organo)silicas. Catalysis Communications. 2017; 88 ():85-89.

Chicago/Turabian Style

Jeroen Lauwaert; Judith Ouwehand; Jeriffa De Clercq; Pegie Cool; Pascal Van Der Voort; Joris W. Thybaut. 2017. "Tuning component enrichment in amino acid functionalized (organo)silicas." Catalysis Communications 88, no. : 85-89.

Article
Published: 19 December 2016 in ChemCatChem
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Macroporous ion exchange resin-supported palladium nanoparticles (Pd-NPs) catalysts are prepared via an intermatrix synthesis. For the first time, the effect of resin functionality (weak acid, strong acid, strong base) on the NP size, their catalytic activity and leaching is investigated in Suzuki cross-coupling of iodobenzene and phenylboronic acid. While the smallest NPs (1.34 nm) are found in the thiol Ambersep GT74 resin, the sulfonic acid Lewatit K2629 and quaternary amine Lewatit MP500 OH resins resulted in NPs of a similar size (2.42 and 2.59 nm respectively). Despite their smaller size, the NPs on Ambersep GT74 exhibited the lowest conversion (21.6%) which is attributed to a too strong coordination of the NPs by the thiol groups. The conversions obtained using Lewatit K2629 (76.8 %) and Lewatit MP500 OH (94.2%) were considerably higher, the excellent performance of the latter catalyst being ascribed to the promoting effect of the hydroxyl groups on the transmetallation and reductive elimination steps in Suzuki cross-coupling. No Pd leaching was observed when using Ambersep GT74 as support, compared to Pd leaching amounting to 1.1% and 4.8% when using Lewatit MP500 OH and Lewatit K2629 respectively. Such low values indicate that ion exchange resins are ideal supports to stabilize the NPs. Particularly the combination of high conversion and limited leaching on Lewatit MP500 OH opens up perspectives for catalyzing the Suzuki cross coupling with a heterogeneous catalyst.

ACS Style

Beau Van Vaerenbergh; Jeroen Lauwaert; Wim Bert; Pieter Vermeir; Joris M Thybaut; Jeriffa De Clercq. Effect of Ion Exchange Resin Functionality on Catalytic Activity and Leaching of Palladium Nanoparticles in Suzuki Cross-Coupling Reactions. ChemCatChem 2016, 9, 451 -457.

AMA Style

Beau Van Vaerenbergh, Jeroen Lauwaert, Wim Bert, Pieter Vermeir, Joris M Thybaut, Jeriffa De Clercq. Effect of Ion Exchange Resin Functionality on Catalytic Activity and Leaching of Palladium Nanoparticles in Suzuki Cross-Coupling Reactions. ChemCatChem. 2016; 9 (3):451-457.

Chicago/Turabian Style

Beau Van Vaerenbergh; Jeroen Lauwaert; Wim Bert; Pieter Vermeir; Joris M Thybaut; Jeriffa De Clercq. 2016. "Effect of Ion Exchange Resin Functionality on Catalytic Activity and Leaching of Palladium Nanoparticles in Suzuki Cross-Coupling Reactions." ChemCatChem 9, no. 3: 451-457.

Book chapter
Published: 01 January 2016 in Rare Earths Industry
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ACS Style

Aida Abbasalizadeh; Vassiliki Aggelatou; Zacharias Agioutantis; Uwe Altenberger; Helmut Antrekowitsch; Efthymios Balomenos; George Barakos; Gregory B. Barnes; Eva Barteková; Nina K. Boesche; Ismar Borges De Lima; E. Bourbos; Maximilian Brell; Panagiotis Davris; Els De Canck; Jeriffa De Clercq; Jeroen De Decker; Bayarmagnai Enkhzul; Andrea Ferrari; I. Giannopoulou; Bertil Grundfelt; X. Guo; Jens Gutzmer; Sabrina Herrmann; Lars Olof Höglund; Sotiris N. Kamenopoulos; A. Karantonis; S. Kaya; Miranda Keith-Roach; James C. Kennedy; Kostas Komnitsas; Friederike Körting; Anne Kousa; Jukka Laukkanen; Walter Leal Filho; Ling Zhi Li; Batzorig Lkhagvasuren; Christin Lubitz; Stefan Luidold; Paloma Magistrati; Nabeel A. Mancheri; Delgermaa Margai; Christian Mielke; Helmut Mischo; Nicolò Olivieri; Dimitrios Panias; Anne Papenfuß; Ioannis Paspaliaris; Sebastiaan Peelman; Esa Pohjolainen; Alexander Poscher; V. Prakash; Christian Rogass; Roberto V. Santos; Holger Schnideritsch; Hans K. Schønwandt; Seshadri Seetharaman; Deborah Shields; Jilt Sietsma; Francisco V. Silveira; Zhi H.I. Sun; Lucy Takehara; Lidong Teng; Sabine Tonn; Y.A. Topkaya; Akseli Torppa; Thomas Ulrich; Pascal Van Der Voort; Xiaosheng Yang; Yongxiang Yang; Volker Zepf. List of Contributors. Rare Earths Industry 2016, 1 .

AMA Style

Aida Abbasalizadeh, Vassiliki Aggelatou, Zacharias Agioutantis, Uwe Altenberger, Helmut Antrekowitsch, Efthymios Balomenos, George Barakos, Gregory B. Barnes, Eva Barteková, Nina K. Boesche, Ismar Borges De Lima, E. Bourbos, Maximilian Brell, Panagiotis Davris, Els De Canck, Jeriffa De Clercq, Jeroen De Decker, Bayarmagnai Enkhzul, Andrea Ferrari, I. Giannopoulou, Bertil Grundfelt, X. Guo, Jens Gutzmer, Sabrina Herrmann, Lars Olof Höglund, Sotiris N. Kamenopoulos, A. Karantonis, S. Kaya, Miranda Keith-Roach, James C. Kennedy, Kostas Komnitsas, Friederike Körting, Anne Kousa, Jukka Laukkanen, Walter Leal Filho, Ling Zhi Li, Batzorig Lkhagvasuren, Christin Lubitz, Stefan Luidold, Paloma Magistrati, Nabeel A. Mancheri, Delgermaa Margai, Christian Mielke, Helmut Mischo, Nicolò Olivieri, Dimitrios Panias, Anne Papenfuß, Ioannis Paspaliaris, Sebastiaan Peelman, Esa Pohjolainen, Alexander Poscher, V. Prakash, Christian Rogass, Roberto V. Santos, Holger Schnideritsch, Hans K. Schønwandt, Seshadri Seetharaman, Deborah Shields, Jilt Sietsma, Francisco V. Silveira, Zhi H.I. Sun, Lucy Takehara, Lidong Teng, Sabine Tonn, Y.A. Topkaya, Akseli Torppa, Thomas Ulrich, Pascal Van Der Voort, Xiaosheng Yang, Yongxiang Yang, Volker Zepf. List of Contributors. Rare Earths Industry. 2016; ():1.

Chicago/Turabian Style

Aida Abbasalizadeh; Vassiliki Aggelatou; Zacharias Agioutantis; Uwe Altenberger; Helmut Antrekowitsch; Efthymios Balomenos; George Barakos; Gregory B. Barnes; Eva Barteková; Nina K. Boesche; Ismar Borges De Lima; E. Bourbos; Maximilian Brell; Panagiotis Davris; Els De Canck; Jeriffa De Clercq; Jeroen De Decker; Bayarmagnai Enkhzul; Andrea Ferrari; I. Giannopoulou; Bertil Grundfelt; X. Guo; Jens Gutzmer; Sabrina Herrmann; Lars Olof Höglund; Sotiris N. Kamenopoulos; A. Karantonis; S. Kaya; Miranda Keith-Roach; James C. Kennedy; Kostas Komnitsas; Friederike Körting; Anne Kousa; Jukka Laukkanen; Walter Leal Filho; Ling Zhi Li; Batzorig Lkhagvasuren; Christin Lubitz; Stefan Luidold; Paloma Magistrati; Nabeel A. Mancheri; Delgermaa Margai; Christian Mielke; Helmut Mischo; Nicolò Olivieri; Dimitrios Panias; Anne Papenfuß; Ioannis Paspaliaris; Sebastiaan Peelman; Esa Pohjolainen; Alexander Poscher; V. Prakash; Christian Rogass; Roberto V. Santos; Holger Schnideritsch; Hans K. Schønwandt; Seshadri Seetharaman; Deborah Shields; Jilt Sietsma; Francisco V. Silveira; Zhi H.I. Sun; Lucy Takehara; Lidong Teng; Sabine Tonn; Y.A. Topkaya; Akseli Torppa; Thomas Ulrich; Pascal Van Der Voort; Xiaosheng Yang; Yongxiang Yang; Volker Zepf. 2016. "List of Contributors." Rare Earths Industry , no. : 1.

Book chapter
Published: 01 January 2016 in Rare Earths Industry
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A metal-organic framework (MOF), MIL-101(Cr), was functionalized and applied for the first time as a selective adsorbent for rare earth metals. Chelating carbamoyl-methylphosphonate–type ligands were covalently anchored onto the organic moieties of the MOF structure, with a yield of 0.7 mmol ligands/g. The material was tested in the adsorption of europium, and selectivity tests to yttrium and zinc were performed. The material reached an adsorption capacity for europium of ∼17 mg Eu/g. Selectivity tests showed very high selectivity for europium over the transition metal zinc (SFEu/Zn: 19.1) and good selectivity between the rare earths europium and yttrium (SFEu/Y: 6.28).

ACS Style

Jeroen De Decker; Jeriffa De Clercq; Els De Canck; Pascal Van Der Voort. Metal-Organic Frameworks in the Field of Liquid Adsorption. Rare Earths Industry 2016, 347 -356.

AMA Style

Jeroen De Decker, Jeriffa De Clercq, Els De Canck, Pascal Van Der Voort. Metal-Organic Frameworks in the Field of Liquid Adsorption. Rare Earths Industry. 2016; ():347-356.

Chicago/Turabian Style

Jeroen De Decker; Jeriffa De Clercq; Els De Canck; Pascal Van Der Voort. 2016. "Metal-Organic Frameworks in the Field of Liquid Adsorption." Rare Earths Industry , no. : 347-356.

Journal article
Published: 01 September 2015 in Advanced Porous Materials
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Incorporation of organic functionalities within porous materials is a very elegant manner to control the administration of therapeutic drugs. Delayed drug-release profile originates from weak and reversible interactions (e.g., electrostatic, hydrophobic–hydrophobic and H-bonding interaction) between the modified carrier and the drug molecule. Two new silsesquioxane PMO precursors were synthesized in a quick and facile Schotten-Baumann reaction of (3-aminopropyltriethoxy)silane and (N-methyl-3-aminopropyltrimethoxy)-silane with malonylchloride, respectively. Based on these bis(3-(triethoxysilyl)propyl)malonamide (MA) and N,N-dimethyl-N,N-bis(3-(triethoxysilyl)propyl)malonamide (mMA) precursors, an extensive range of 2D hexagonal PMOs with high functional loading was obtained by the co-condensation with tetraethyl orthosilicate (TEOS) in a typical PMO synthesis (acidic medium, P123, KCl). The materials showed good ordering up to 20 mol% of functional loading, a large surface area (up to 550 m2/g) and wide pores (∼7 nm). The malonamide-type PMOs are capable to adsorb large amounts of ibuprofen (130 mg/g) as a hydrophobic model drug. Release experiments are performed in a phosphate buffer solution at pH 7.4 and show a controlled desorption of Ibuprofen over 24 hours; a largely expanded times pan compared to mesoporous silicas. Moreover, we are able to tune the release profile by varying the content of organic bridges in the PMO pores.

ACS Style

Sander Clerick; Wannes Libbrecht; Otto Van Den Bergh; Els De Canck; Jeriffa De Clercq; Pascal Van Der Voort. A Novel Malonamide Periodic Mesoporous Organosilica (PMO) for Tuneable Ibuprofen Release. Advanced Porous Materials 2015, 2, 157 -164.

AMA Style

Sander Clerick, Wannes Libbrecht, Otto Van Den Bergh, Els De Canck, Jeriffa De Clercq, Pascal Van Der Voort. A Novel Malonamide Periodic Mesoporous Organosilica (PMO) for Tuneable Ibuprofen Release. Advanced Porous Materials. 2015; 2 (3):157-164.

Chicago/Turabian Style

Sander Clerick; Wannes Libbrecht; Otto Van Den Bergh; Els De Canck; Jeriffa De Clercq; Pascal Van Der Voort. 2015. "A Novel Malonamide Periodic Mesoporous Organosilica (PMO) for Tuneable Ibuprofen Release." Advanced Porous Materials 2, no. 3: 157-164.