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The rational design of highly active electrocatalysts for hydrogen evolution reaction (HER) with controllable morphology creates new opportunities for future hydrogen economy. Herein, a facile strategy was developed to synthesize molybdenum carbide (Mo2C). First, Mo-based inorganic-organic complexes with distinct architectures were constructed by judiciously adjusting the pH values of the reaction systems as well as the types of inorganic and organic components. Next, the complexes were calcinated under vacuum to form different assemblies such as nanofibers, polyhedrons and microspheres composed of Mo2C particles. The results indicate that the nanofibers not only alleviate the aggregation and oxidation of internal carbides to achieve more active sites, but also provide a resistance-less path to facilitate the charge transfer process. Consequently, the resultant catalyst with unique one-dimensional (1D) structure exhibits enhanced HER performance under acidic conditions, affording an overpotential of 159 mV at a current density of 10 mA cm−2 and Tafel slope of 65.2 mV dec−1. This work may provide a new approach to develop Mo-based catalysts with excellent HER activity through morphological control.
Dongrui Yang; Mengying Chen; Shifan Wu; Dali Zhou; Can Liu. Achieving enhanced electrocatalytic performance towards hydrogen evolution of molybdenum carbide via morphological control. Journal of Alloys and Compounds 2021, 881, 160593 .
AMA StyleDongrui Yang, Mengying Chen, Shifan Wu, Dali Zhou, Can Liu. Achieving enhanced electrocatalytic performance towards hydrogen evolution of molybdenum carbide via morphological control. Journal of Alloys and Compounds. 2021; 881 ():160593.
Chicago/Turabian StyleDongrui Yang; Mengying Chen; Shifan Wu; Dali Zhou; Can Liu. 2021. "Achieving enhanced electrocatalytic performance towards hydrogen evolution of molybdenum carbide via morphological control." Journal of Alloys and Compounds 881, no. : 160593.
Hierarchical porous carbon/ silicon carbide composite (HPC/SiC) was fabricated directly from raw biomass via a facile method, in which the wasted villi of bamboo shoot shell (VBSS) and KOH were employed as green carbon source and chemical etching agent, respectively. Owing to the large surface area and developed porous texture originating from carbon and the favorable conductivity resulting from SiC, the obtained HPC/SiC exhibits a specific capacitance of 234.2 F g−1 at the current density of 1 A g−1, a remarkable rate capability of 71.4% at 20 A g−1 and a prominent cycling performance with 90.8% retention after 10,000 cycles. The assembled symmetric device demonstrates a 224 F g−1 specific capacitance at a current density of 0.2 A g−1. The high energy densities of 25.20 W h kg−1 and 17.44 W h kg−1 with corresponding power densities of 181.1 W kg−1 and 17.94 kW kg−1 have been obtained, respectively. This work not only demonstrates that SiC can be formed in the wasted VBSS under mild natural condition for the first time, but also open up new opportunities for the rational design of more efficient biomass-based materials for supercapacitors.
Qin Tang; Xianyong Chen; Dali Zhou; Can Liu. Biomass-derived hierarchical porous carbon/silicon carbide composite for electrochemical supercapacitor. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2021, 620, 126567 .
AMA StyleQin Tang, Xianyong Chen, Dali Zhou, Can Liu. Biomass-derived hierarchical porous carbon/silicon carbide composite for electrochemical supercapacitor. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2021; 620 ():126567.
Chicago/Turabian StyleQin Tang; Xianyong Chen; Dali Zhou; Can Liu. 2021. "Biomass-derived hierarchical porous carbon/silicon carbide composite for electrochemical supercapacitor." Colloids and Surfaces A: Physicochemical and Engineering Aspects 620, no. : 126567.
To achieve the optimized performance and the widespread application of thermoelectric materials, it is crucial to decouple the highly interrelated thermoelectric parameters of materials. In this study, we illustrate that phonon and carrier transport properties of n-type Bi2Te3-based composites can be simultaneously optimized through alloying Cu2Se. Owing to the chemical reactions between the Bi2Te3 matrix and the Cu2Se additives during the sample preparation, the carrier concentration and density-of-states effective mass can be tuned to optimize the carrier transport properties, while the lattice thermal conductivity can be reduced by introducing hierarchical structures including point defects, Cu7Te5 inclusions, phase boundaries and localized Te-deficient regions. As a result, an enhanced thermoelectric performance is achieved compared with pristine Bi2Te3. Our study indicates the alloying Cu2Se can synergistically control the thermoelectric properties of Bi2Te3.
Jie Chen; Deyu Bao; Qiang Sun; Wei-Di Liu; Can Liu; Jun Tang; Lei Yang; Dali Zhou; Matthew S. Dargusch; Zhi-Gang Chen. Simultaneously optimized thermoelectric performance of n-type Cu2Se alloyed Bi2Te3. Journal of Solid State Chemistry 2021, 296, 121987 .
AMA StyleJie Chen, Deyu Bao, Qiang Sun, Wei-Di Liu, Can Liu, Jun Tang, Lei Yang, Dali Zhou, Matthew S. Dargusch, Zhi-Gang Chen. Simultaneously optimized thermoelectric performance of n-type Cu2Se alloyed Bi2Te3. Journal of Solid State Chemistry. 2021; 296 ():121987.
Chicago/Turabian StyleJie Chen; Deyu Bao; Qiang Sun; Wei-Di Liu; Can Liu; Jun Tang; Lei Yang; Dali Zhou; Matthew S. Dargusch; Zhi-Gang Chen. 2021. "Simultaneously optimized thermoelectric performance of n-type Cu2Se alloyed Bi2Te3." Journal of Solid State Chemistry 296, no. : 121987.
In this work, we fabricate perovskite-type Ca1−x−yLaxSryMnO3 thermoelectric materials using co-precipitation method, followed by cold pressing and hot sintering. The La/Sr dual doping modifies chemical composition and bonding properties of CaMnO3, resulting in improved electrical transport properties with tunable carrier concentration, carrier mobility and effective mass. Meanwhile, the phonon transport properties are also influenced, reflected by the reduced lattice thermal conductivity of Ca1−x−yLaxSryMnO3. As a result, Ca0.94La0.02Sr0.04MnO3 shows significantly enhanced power factor up to 374 μW·m−1·K−2 and figure of merit up to ~0.22 at 973 K, which is ~144% higher than those of pristine CaMnO3. This study rationalizes a potential strategy to improve the thermoelectric performance of CaMnO3-based materials.
Taoyi Liu; Jie Chen; Meng Li; Guang Han; Can Liu; Dali Zhou; Jin Zou; Zhi-Gang Chen; Lei Yang. Achieving enhanced thermoelectric performance of Ca1−x−yLaxSryMnO3 via synergistic carrier concentration optimization and chemical bond engineering. Chemical Engineering Journal 2020, 408, 127364 .
AMA StyleTaoyi Liu, Jie Chen, Meng Li, Guang Han, Can Liu, Dali Zhou, Jin Zou, Zhi-Gang Chen, Lei Yang. Achieving enhanced thermoelectric performance of Ca1−x−yLaxSryMnO3 via synergistic carrier concentration optimization and chemical bond engineering. Chemical Engineering Journal. 2020; 408 ():127364.
Chicago/Turabian StyleTaoyi Liu; Jie Chen; Meng Li; Guang Han; Can Liu; Dali Zhou; Jin Zou; Zhi-Gang Chen; Lei Yang. 2020. "Achieving enhanced thermoelectric performance of Ca1−x−yLaxSryMnO3 via synergistic carrier concentration optimization and chemical bond engineering." Chemical Engineering Journal 408, no. : 127364.
For purpose of developing noble-metal-free electrocatalysts with high activity toward hydrogen evolution reaction (HER), tungsten-cased carbides are synthesized with ammonium metatungstate as tungsten source, resorcinol and formaldehyde as carbon source. Systematic experiments demonstrate that the introduction of iron nitrate complexed with trisodium citrate has a clear impact on the structural and morphological features of final products. Moreover, various crystalline phases involving WC, W2C, W and Fe3W3C can be readily tuned by altering the Fe/W atomic ratio. Electrochemical measurements reveal that the HER activity of Fe3W3C is superior to those of other control groups, giving a η10 (the overpotential for driving a current density of 10 mA cm−2) of −226 mV and Tafel slope of 91 mV dec−1 in acid solution. Theoretical calculations suggest the improved electrocatalytic performance of Fe3W3C may be attributed to the hydrogen spillover from W sites to Fe sites. This work may open up new opportunities to develop high-performance catalysts via accelerating hydrogen adsorption and hydrogen evolution at different components.
Can Liu; Weiwen Wang; Shifan Wu; Mengying Chen; Jiabei Zhou; Dali Zhou; Bingbing Chen. Compositional engineering of tungsten-based carbides toward electrocatalytic hydrogen evolution. Journal of Alloys and Compounds 2020, 848, 156501 .
AMA StyleCan Liu, Weiwen Wang, Shifan Wu, Mengying Chen, Jiabei Zhou, Dali Zhou, Bingbing Chen. Compositional engineering of tungsten-based carbides toward electrocatalytic hydrogen evolution. Journal of Alloys and Compounds. 2020; 848 ():156501.
Chicago/Turabian StyleCan Liu; Weiwen Wang; Shifan Wu; Mengying Chen; Jiabei Zhou; Dali Zhou; Bingbing Chen. 2020. "Compositional engineering of tungsten-based carbides toward electrocatalytic hydrogen evolution." Journal of Alloys and Compounds 848, no. : 156501.
The storage and landfill of spent V2O5–WO3/TiO2 selective catalytic reduction (SCR) catalysts can pose environmental hazards, and the valuable tungsten, vanadium and titanium resources are wasted due to the lack of appropriate recycling technology. In this study, we explore an effective and low-cost method to simultaneously recycle tungsten, vanadium and titanium from spent SCR catalysts. We extract tungsten and vanadium are from spent SCR catalysts by a Na2CO3–NaCl molten salt roasting-leaching method, then obtain enriched tungsten, vanadium solution through an ion-exchange and NaOH elution process, and separate tungsten and vanadium via an ammonium salt precipitation method. By optimizing the experimental conditions, 95.5% of tungsten and 94.9% vanadium are leached from the spent SCR catalysts, among which 93.4% of vanadium and 96.2% of tungsten can be precipitated. The leached residue mainly consists of nano-sized TiO2 and sodium titanate nanorods, which is used as adsorbent for heavy metal ions (Pb(Ⅱ), Cd(Ⅱ) and Cr(Ⅲ)). The maximum adsorption capacities are 338.503 mg g−1 for Pb(Ⅱ), 227.675 mg g−1 for Cd(Ⅱ) and 97.262 mg g−1 for Cr(Ⅲ) at pH 6.0. Competitive adsorption among the three metal ions follows the sequence of Pb(Ⅱ) > Cd(Ⅱ) > Cr(Ⅲ). The adsorption data can be well fitted by the Langmuir model, and the adsorption kinetic follows the pseudo-second-order model. Furthermore, the X-ray photoelectron spectroscopy (XPS) analysis shows that the adsorption of Pb(Ⅱ), Cd(Ⅱ) and Cr(Ⅲ) by our adsorbent can be ascribed to the ion exchange of heavy metal ions with Na ions.
Bi Yang; Jiabei Zhou; Weiwen Wang; Can Liu; Dali Zhou; Lei Yang. Extraction and separation of tungsten and vanadium from spent V2O5–WO3/TiO2 SCR catalysts and recovery of TiO2 and sodium titanate nanorods as adsorbent for heavy metal ions. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2020, 601, 124963 .
AMA StyleBi Yang, Jiabei Zhou, Weiwen Wang, Can Liu, Dali Zhou, Lei Yang. Extraction and separation of tungsten and vanadium from spent V2O5–WO3/TiO2 SCR catalysts and recovery of TiO2 and sodium titanate nanorods as adsorbent for heavy metal ions. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2020; 601 ():124963.
Chicago/Turabian StyleBi Yang; Jiabei Zhou; Weiwen Wang; Can Liu; Dali Zhou; Lei Yang. 2020. "Extraction and separation of tungsten and vanadium from spent V2O5–WO3/TiO2 SCR catalysts and recovery of TiO2 and sodium titanate nanorods as adsorbent for heavy metal ions." Colloids and Surfaces A: Physicochemical and Engineering Aspects 601, no. : 124963.
In this study, Bi2Te3 nanostructures were synthesized with controlled morphologies by using a solvothermal process and then sintered by spark plasma sintering to obtain bulk samples with controllable texture degrees. The sintered nanostructured Bi2Te3 pellets show texture-dependent thermoelectric properties, in which their Seebeck coefficient, electrical conductivity and thermal conductivity can be optimized by the proper texture design to simultaneously secure a high carrier mobility and strong phonon scattering, resulting in a peak ZT value of ~0.69 at 333 K. This study reveals the potential of texture engineering in developing high performance anisotropic thermoelectric materials.
Deyu Bao; Jie Chen; Yuan Yu; Wei-Di Liu; Linsen Huang; Guang Han; Jun Tang; Dali Zhou; Lei Yang; Zhi-Gang Chen. Texture-dependent thermoelectric properties of nano-structured Bi2Te3. Chemical Engineering Journal 2020, 388, 124295 .
AMA StyleDeyu Bao, Jie Chen, Yuan Yu, Wei-Di Liu, Linsen Huang, Guang Han, Jun Tang, Dali Zhou, Lei Yang, Zhi-Gang Chen. Texture-dependent thermoelectric properties of nano-structured Bi2Te3. Chemical Engineering Journal. 2020; 388 ():124295.
Chicago/Turabian StyleDeyu Bao; Jie Chen; Yuan Yu; Wei-Di Liu; Linsen Huang; Guang Han; Jun Tang; Dali Zhou; Lei Yang; Zhi-Gang Chen. 2020. "Texture-dependent thermoelectric properties of nano-structured Bi2Te3." Chemical Engineering Journal 388, no. : 124295.
Ca3Co4O9+δ ceramic is a potential p-type thermoelectric material for high temperature applications, however, its thermoelectric performance is limited by the strongly interrelated thermoelectric parameters. In this work, we develop an effective method to simultaneously tune the electrical and thermal transport properties of Ca3Co4O9+δ. We firstly synthesize Ca3Co4O9+δ powders and subsequently obtain surface modified Cu/Ca3Co4O9+δ through a well-controlled electroless plating technique followed by a fast Spark Plasma Sintering process. The detailed characterizations of microstructures and chemical compositions of Cu/Ca3Co4O9+δ samples suggest that the plated Cu has been doped into the Ca3Co4O9+δ after sintering. The doped Cu substitutes Ca ions, creates local oxygen deficiency and increases the ratios of Co3+ and Co4+, which reduces the carrier concentration and induces Ca-missed regions, thus, reducing the electrical and thermal conductivity. This study indicates that introducing metallic Cu phase by chemical electroless technique is a promising method to tune the thermoelectric properties of Ca3Co4O9+δ-based ceramics by altering the chemical composition and microstructures.
Taoyi Liu; Deyu Bao; Yuan Wang; Han Gao; Dali Zhou; Guang Han; Jun Tang; Zhong-Yue Huang; Lei Yang; Zhi-Gang Chen. Exploring thermoelectric performance of Ca3Co4O9+δ ceramics via chemical electroless plating with Cu. Journal of Alloys and Compounds 2019, 821, 153522 .
AMA StyleTaoyi Liu, Deyu Bao, Yuan Wang, Han Gao, Dali Zhou, Guang Han, Jun Tang, Zhong-Yue Huang, Lei Yang, Zhi-Gang Chen. Exploring thermoelectric performance of Ca3Co4O9+δ ceramics via chemical electroless plating with Cu. Journal of Alloys and Compounds. 2019; 821 ():153522.
Chicago/Turabian StyleTaoyi Liu; Deyu Bao; Yuan Wang; Han Gao; Dali Zhou; Guang Han; Jun Tang; Zhong-Yue Huang; Lei Yang; Zhi-Gang Chen. 2019. "Exploring thermoelectric performance of Ca3Co4O9+δ ceramics via chemical electroless plating with Cu." Journal of Alloys and Compounds 821, no. : 153522.
The heavy metal Cd(II) in wastewater is highly toxic to organisms and must be removed. In this work, an efficient Cd(II) adsorbent consisting of ground calcium carbonate (GCC) and nano-TiO2 (GCC/TiO2) was harvested through a facile two-step strategy. Firstly, GCC was immersed in titanium sol which prepared from titanium butoxide to form the precursor. Secondly, GCC/TiO2 was obtained via hydrothermal reaction and the optimal hydrothermal condition was determined to be pH of 3, temperature of 200 °C and reaction time of 12 h. The removal of Cd(II) from aqueous solution by adsorbents under different hydrothermal conditions and adsorption experiments was studied by means of SEM, FT-IR, XPS, and ICP. The maximum Cd(II) removal capacity was approximately 124.07 mg/g at 25 °C and the adsorption equilibrium was attained in only 8 min (at 100 mg/g initial Cd(II) concentration, 0.8 g/L adsorbent dosage, and an initial Cd(II) solution pH of 5). Furthermore, the Cd(II) removal capacity of GCC/TiO2 was significantly higher than that of isolated GCC and TiO2 and exhibited an excellent self-settlement property, which is beneficial for adsorbent separation in practical applications. The Cd(II) removal mechanisms include ion-exchange reaction between Cd(II) and the Ca2+ ions on the GCC/TiO2 surface and electrostatic attraction. Moreover, the GCC/TiO2 adsorbent could be regenerated by ethylenediaminetetraacetic acid disodium salt and exhibited a high reusability. The adsorption data could be well fitted by the Langmuir model, and the adsorption kinetic follows the pseudo-second-order model indicating that the removal processes are controlled by the chemisorption mechanism.
Shanguang Wang; Dali Zhou; Jiabei Zhou; Can Liu; Xiao Xiao; Chengsheng Song. Cd(II) Removal by Novel Fabricated Ground Calcium Carbonate/Nano-TiO2 (GCC/TiO2) Composite from Aqueous Solution. Water, Air, & Soil Pollution 2019, 230, 147 .
AMA StyleShanguang Wang, Dali Zhou, Jiabei Zhou, Can Liu, Xiao Xiao, Chengsheng Song. Cd(II) Removal by Novel Fabricated Ground Calcium Carbonate/Nano-TiO2 (GCC/TiO2) Composite from Aqueous Solution. Water, Air, & Soil Pollution. 2019; 230 (7):147.
Chicago/Turabian StyleShanguang Wang; Dali Zhou; Jiabei Zhou; Can Liu; Xiao Xiao; Chengsheng Song. 2019. "Cd(II) Removal by Novel Fabricated Ground Calcium Carbonate/Nano-TiO2 (GCC/TiO2) Composite from Aqueous Solution." Water, Air, & Soil Pollution 230, no. 7: 147.
Copper selenide (Cu2Se) has been extensively studied as an eco-friendly thermoelectric candidate owing to the outstanding thermoelectric performance of its high-temperature β-phase. In this study, we propose that α-Cu2Se is also a promising thermoelectric material at near-room-temperature. We synthesize nanostructured Cu2-xSe via a facile solvothermal method, and densify the samples using spark plasma sintering to maintain the small grain sizes. Although the as-prepared α-Cu2Se has intrinsically low lattice thermal conductivity, its high Cu deficiencies leads to a high carrier concentration, therefore, a low thermoelectric performance. As an electron donor, bismuth can effectively compress the Cu vacancies of the as-prepared α-Cu2Se and in turn reduce its carrier concentration from 4.1 × 1020 to 2.0 × 1020 cm-3 at room temperature, achieving a significantly enhanced power factor and a reduced carrier thermal conductivity. Consequently, a zT of 0.43 at 373 K is obtained in Cu1.982Bi0.006Se, showing great potential in developing high-performance near-room-temperature α-Cu2Se-based thermoelectric materials.
Wang-Wei Liao; Lei Yang; Jie Chen; Da-Li Zhou; Xian-Lin Qu; Kun Zheng; Guang Han; Jia-Bei Zhou; Min Hong; Zhi-Gang Chen. Realizing Bi-doped α-Cu2Se as a promising near-room-temperature thermoelectric material. Chemical Engineering Journal 2019, 371, 593 -599.
AMA StyleWang-Wei Liao, Lei Yang, Jie Chen, Da-Li Zhou, Xian-Lin Qu, Kun Zheng, Guang Han, Jia-Bei Zhou, Min Hong, Zhi-Gang Chen. Realizing Bi-doped α-Cu2Se as a promising near-room-temperature thermoelectric material. Chemical Engineering Journal. 2019; 371 ():593-599.
Chicago/Turabian StyleWang-Wei Liao; Lei Yang; Jie Chen; Da-Li Zhou; Xian-Lin Qu; Kun Zheng; Guang Han; Jia-Bei Zhou; Min Hong; Zhi-Gang Chen. 2019. "Realizing Bi-doped α-Cu2Se as a promising near-room-temperature thermoelectric material." Chemical Engineering Journal 371, no. : 593-599.
Glass lubricants have great potential in industrial metal forming processes such as hot extrusion of titanium and titanium alloys. In this work, based on the extrusion process of commercial-purity titanium (TA2) at 800 °C, glass lubricants with low melting points are designed. The thermal properties, high-temperature oxidation resistance and friction properties of uncoated and glass-coated TA2 samples are systemically studied, which reveals the good lubricating and anti-oxidation properties of the samples. The glass lubricant melts into a viscoelastic film at 800 °C to insulate TA2 from oxygen and reduce friction, and automatically peel off during cooling due to the significantly mismatched thermal expansion between the glass coating and TA2 substrate. This work provides a guidance for designing glass-based lubricants used in hot extrusion of metals.
Qing Fan; Dali Zhou; Lei Yang; Jiabei Zhou; Shuang Yang; Yongqiang Yang. Study on the oxidation resistance and tribological behavior of glass lubricants used in hot extrusion of commercial purity titanium. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2018, 559, 251 -257.
AMA StyleQing Fan, Dali Zhou, Lei Yang, Jiabei Zhou, Shuang Yang, Yongqiang Yang. Study on the oxidation resistance and tribological behavior of glass lubricants used in hot extrusion of commercial purity titanium. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2018; 559 ():251-257.
Chicago/Turabian StyleQing Fan; Dali Zhou; Lei Yang; Jiabei Zhou; Shuang Yang; Yongqiang Yang. 2018. "Study on the oxidation resistance and tribological behavior of glass lubricants used in hot extrusion of commercial purity titanium." Colloids and Surfaces A: Physicochemical and Engineering Aspects 559, no. : 251-257.
Nowadays, water pollution by industrial waste water that contains heavy metal elements, such as Cd, has become an urgent concern to be solved. In this work, magnetic γ-Fe2O3/Fe-doped hydroxyapatite (HAP) nanostructures are realized as Cd(II) adsorbents with outstanding adsorption performance. The Vibrating Sample Magnetometer (VSM) analysis and magnetic separation experiments reveal that γ-Fe2O3/Fe-doped HAP nanostructures can be effectively separated by external magnet. Compared with pure HAP, the γ-Fe2O3/Fe-doped HAP nanostructures show higher adsorbed concentration and adsorption rate. The maximum adsorbed concentration at the equilibrium is 258 mg g−1 (under initial concentration of 500 mg L−1, temperature = 25 °C and pH = 5.0), which is higher than values reported for most of HAP-based adsorbents. The adsorption data could be well fitted by the Freundlich model, and the adsorption kinetic follows the pseudo-second-order model. Furthermore, the study of adsorption mechanism reveals that both ion-exchange and electrostatic interaction are involved in process of Cd(II) adsorption.
Xiao Xiao; Lei Yang; Dali Zhou; Jiabei Zhou; Yaping Tian; Chengsheng Song; Can Liu. Magnetic γ-Fe2O3/Fe-doped hydroxyapatite nanostructures as high-efficiency cadmium adsorbents. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2018, 555, 548 -557.
AMA StyleXiao Xiao, Lei Yang, Dali Zhou, Jiabei Zhou, Yaping Tian, Chengsheng Song, Can Liu. Magnetic γ-Fe2O3/Fe-doped hydroxyapatite nanostructures as high-efficiency cadmium adsorbents. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2018; 555 ():548-557.
Chicago/Turabian StyleXiao Xiao; Lei Yang; Dali Zhou; Jiabei Zhou; Yaping Tian; Chengsheng Song; Can Liu. 2018. "Magnetic γ-Fe2O3/Fe-doped hydroxyapatite nanostructures as high-efficiency cadmium adsorbents." Colloids and Surfaces A: Physicochemical and Engineering Aspects 555, no. : 548-557.
Sodium silicate water glass was modified with sodium polyacrylate as the binder, the composite slurry used for high-temperature oxidation-resistant coating was prepared by mixing glass powder with good lubrication properties in the binder. The properties of the modified binder and high-temperature oxidation resistance of Ti-6Al-4V titanium alloy coated with composite glass coating were studied by XRD, SEM, EDS, TG-DSC and so on. Results showed that sodium polyacrylate modified water glass could obviously improve the suspension stability of the binder, the pyrolytic carbon in the binder at high temperature could increase the surface tension in the molten glass system, and the composite glass coating could be smooth and dense after heating. Pyrolytic carbon diffused and combined with oxygen in the coating under the heating process to protect the titanium alloy from oxidation. The thickness of the oxide layer was reduced 51% after applying the high-temperature oxidation-resistant coating. The coating also showed a nearly 30% reduction in friction coefficient due to the boundary lubricant regime. During cooling, the coating could be peeled off easily because of the mismatched CTE between the coating and substrate.
Shuang Yang; Dali Zhou; Jiabei Zhou; Lei Yang; Qing Fan; Qianqian Yao; Yongqiang Yang. Study on Modified Water Glass Used in High Temperature Protective Glass Coating for Ti-6Al-4V Titanium Alloy. Coatings 2018, 8, 158 .
AMA StyleShuang Yang, Dali Zhou, Jiabei Zhou, Lei Yang, Qing Fan, Qianqian Yao, Yongqiang Yang. Study on Modified Water Glass Used in High Temperature Protective Glass Coating for Ti-6Al-4V Titanium Alloy. Coatings. 2018; 8 (5):158.
Chicago/Turabian StyleShuang Yang; Dali Zhou; Jiabei Zhou; Lei Yang; Qing Fan; Qianqian Yao; Yongqiang Yang. 2018. "Study on Modified Water Glass Used in High Temperature Protective Glass Coating for Ti-6Al-4V Titanium Alloy." Coatings 8, no. 5: 158.
Identifying the exposed surfaces of rutile TiO2 crystal is crucial for its industry application and surface engineering. In this study, the shape of the rutile TiO2 was constructed by applying equilibrium thermodynamics of TiO2 crystals via first-principles density functional theory (DFT) and Wulff principles. From the DFT calculations, the surface energies of six low-index stoichiometric facets of TiO2 are determined after the calibrations of crystal structure. And then, combined surface energy calculations and Wulff principles, a geometric model of equilibrium rutile TiO2 is built up, which is coherent with the typical morphology of fully-developed equilibrium TiO2 crystal. This study provides fundamental theoretical guidance for the surface analysis and surface modification of the rutile TiO2-based materials from experimental research to industry manufacturing.
Fengzhou Jiang; Lei Yang; Dali Zhou; Gang He; Jiabei Zhou; Fanhou Wang; Zhi-Gang Chen. First-principles atomistic Wulff constructions for an equilibrium rutile TiO2 shape modeling. Applied Surface Science 2017, 436, 989 -994.
AMA StyleFengzhou Jiang, Lei Yang, Dali Zhou, Gang He, Jiabei Zhou, Fanhou Wang, Zhi-Gang Chen. First-principles atomistic Wulff constructions for an equilibrium rutile TiO2 shape modeling. Applied Surface Science. 2017; 436 ():989-994.
Chicago/Turabian StyleFengzhou Jiang; Lei Yang; Dali Zhou; Gang He; Jiabei Zhou; Fanhou Wang; Zhi-Gang Chen. 2017. "First-principles atomistic Wulff constructions for an equilibrium rutile TiO2 shape modeling." Applied Surface Science 436, no. : 989-994.
Semiconductor photocatalysis provides potential solutions for many energy and environmental-related issues. Recently, various semiconductors with hierarchical nanostructures have been fabricated to achieve efficient photocatalysts owing to their multiple advantages, such as high surface area, porous structures, as well as enhanced light harvesting. ZnO has been widely investigated and considered as the most promising alternative photocatalyst to TiO2. Herein, we present a review on the fabrication methods, growth mechanisms and photocatalytic applications of hierarchical ZnO nanostructures. Various synthetic strategies and growth mechanisms, including multistep sequential growth routes, template-based synthesis, template-free self-organization and precursor or self-templating strategies, are highlighted. In addition, the fabrication of multicomponent ZnO-based nanocomposites with hierarchical structures is also included. Finally, the application of hierarchical ZnO nanostructures and nanocomposites in typical photocatalytic reactions, such as pollutant degradation and H2 evolution, is reviewed.
Yi Xia; Jing Wang; Ruosong Chen; Dali Zhou; Lan Xiang. A Review on the Fabrication of Hierarchical ZnO Nanostructures for Photocatalysis Application. Crystals 2016, 6, 148 .
AMA StyleYi Xia, Jing Wang, Ruosong Chen, Dali Zhou, Lan Xiang. A Review on the Fabrication of Hierarchical ZnO Nanostructures for Photocatalysis Application. Crystals. 2016; 6 (11):148.
Chicago/Turabian StyleYi Xia; Jing Wang; Ruosong Chen; Dali Zhou; Lan Xiang. 2016. "A Review on the Fabrication of Hierarchical ZnO Nanostructures for Photocatalysis Application." Crystals 6, no. 11: 148.
The influence of ZnO nanoseeds on the formation of ZnO nanorods from ε-Zn(OH)2 in NaOH solution at 80 °C was investigated, using ZnO nanoparticles with a diameter of 4–10 nm as the seeds. The experimental results indicated that the presence of ZnO nanoseeds promoted the rapid heterogeneous formation of ultrathin ZnO nanorods. Compared with the ZnO submicron rods with a diameter of 0.5–1.0 µm, the ultrathin ZnO nanorods with a diameter of 10–15 nm were found to be more sensitive for detecting NO2 at room temperature owing to their higher variation of channel conduction to the diameter.
Yi Xia; Jing Wang; Xian Li; Dan Xie; Dali Zhou; Lan Xiang; Sridhar Komarneni. Nanoseed-assisted rapid formation of ultrathin ZnO nanorods for efficient room temperature NO2 detection. Ceramics International 2016, 42, 15876 -15880.
AMA StyleYi Xia, Jing Wang, Xian Li, Dan Xie, Dali Zhou, Lan Xiang, Sridhar Komarneni. Nanoseed-assisted rapid formation of ultrathin ZnO nanorods for efficient room temperature NO2 detection. Ceramics International. 2016; 42 (14):15876-15880.
Chicago/Turabian StyleYi Xia; Jing Wang; Xian Li; Dan Xie; Dali Zhou; Lan Xiang; Sridhar Komarneni. 2016. "Nanoseed-assisted rapid formation of ultrathin ZnO nanorods for efficient room temperature NO2 detection." Ceramics International 42, no. 14: 15876-15880.
The effects of the concentration of hydrochloric acid and treatment time on the transformation of Li2TiO3 were studied in detail. The results demonstrate that lithium ions are easily removed from the (−133) and (−206) planes. In contrast, Li+ extraction requires a longer time for the (002) and (−131) planes. A mixture of the anatase and rutile phases, pure rutile, and pure anatase can be generated by treating Li2TiO3 with a suitable concentration of hydrochloric acid for an appropriate amount of time. The phase(s) that are present significantly affect the cyclic adsorption performance of a titanium lithium ion sieve and the dissolution of Ti. The transformation from H2TiO3 particles to TiO2 primarily occurs via the dissolution-recrystallization process. The electrophilic H+ and highly electronegative Cl− affect the Ti–O bond, resulting in the destruction of the Ti–O bond in TiO6 octahedrons, promoting the structural rearrangement of anatase to rutile TiO2.
Liyuan Zhang; Gang He; Dali Zhou; Jiabei Zhou; Qianqian Yao. Study on transformation mechanism of lithium titanate modified with hydrochloric acid. Ionics 2016, 22, 2007 -2014.
AMA StyleLiyuan Zhang, Gang He, Dali Zhou, Jiabei Zhou, Qianqian Yao. Study on transformation mechanism of lithium titanate modified with hydrochloric acid. Ionics. 2016; 22 (11):2007-2014.
Chicago/Turabian StyleLiyuan Zhang; Gang He; Dali Zhou; Jiabei Zhou; Qianqian Yao. 2016. "Study on transformation mechanism of lithium titanate modified with hydrochloric acid." Ionics 22, no. 11: 2007-2014.
H2TiO3–lithium adsorbent was obtained from the acid-modified precursor Li2TiO3, which was synthesized via the solid-phase reaction between LiOH·H2O and a Ti-rich material. The Ti-rich material containing 88.35% TiO2 was prepared from low-grade titanium slag via an upgrading process primarily involving alkaline roasting and acid leaching-hydrolysis. The parameters for the synthesis and acid treatment of the Li2TiO3 precursor were investigated. It was observed that monoclinic β-Li2TiO3 with good crystallization could be synthesized at 750 °C with a Li/Ti molar ratio of 2.5. The adsorbent obtained under the optimized preparation conditions exhibited an excellent lithium adsorption capacity of up to 27.8 mg/g in LiOH solution with a Li+ concentration of 2 g/L, and the adsorption capacity stabilized at 23 to 24 mg/g after several cycles. The adsorbent had better Li+ selectivity in the synthetic salt-lake brine solution. The separation coefficients of Li+ to Na+ and K+ reached 37.5 and 26.9, respectively.
Dahai Tang; Dali Zhou; Jiabei Zhou; Ping Zhang; Liyuan Zhang; Yi Xia. Preparation of H2TiO3–lithium adsorbent using low-grade titanium slag. Hydrometallurgy 2015, 157, 90 -96.
AMA StyleDahai Tang, Dali Zhou, Jiabei Zhou, Ping Zhang, Liyuan Zhang, Yi Xia. Preparation of H2TiO3–lithium adsorbent using low-grade titanium slag. Hydrometallurgy. 2015; 157 ():90-96.
Chicago/Turabian StyleDahai Tang; Dali Zhou; Jiabei Zhou; Ping Zhang; Liyuan Zhang; Yi Xia. 2015. "Preparation of H2TiO3–lithium adsorbent using low-grade titanium slag." Hydrometallurgy 157, no. : 90-96.
An orthogonal test design was applied to confirm the optimum condition for H2TiO3–lithium adsorbent preparation and Li+ adsorption. Extraction and adsorption mechanism and cycle performance were studied. The verified optimal condition is confirmed as the Li+ concentration, adsorption temperature, molar ratio of Li/Ti, reaction, and pre-calcination temperature are 4.0 g L−1, 60 °C, 2.2, and 650 and 25 °C, respectively. Under the optimal condition, the adsorptive capacity reaches 57.8 mg g−1. Adsorptive capacity of the adsorbent maintains in 5 cycles, typically 25–30 mg g−1.
Gang He; Liyuan Zhang; Dali Zhou; Yuanwen Zou; Fanhou Wang. The optimal condition for H2TiO3–lithium adsorbent preparation and Li+ adsorption confirmed by an orthogonal test design. Ionics 2015, 21, 2219 -2226.
AMA StyleGang He, Liyuan Zhang, Dali Zhou, Yuanwen Zou, Fanhou Wang. The optimal condition for H2TiO3–lithium adsorbent preparation and Li+ adsorption confirmed by an orthogonal test design. Ionics. 2015; 21 (8):2219-2226.
Chicago/Turabian StyleGang He; Liyuan Zhang; Dali Zhou; Yuanwen Zou; Fanhou Wang. 2015. "The optimal condition for H2TiO3–lithium adsorbent preparation and Li+ adsorption confirmed by an orthogonal test design." Ionics 21, no. 8: 2219-2226.
Kaolin, talc powder and alumina were used as raw materials to prepare ceramic foams using a protein foaming agent via direct foaming. CH3COOLi and Ti(OC4H9)4 were employed as lithium and titanium sources, respectively to synthesize Li2TiO3 by the sol–gel process during which Li2TiO3 was loaded on ceramic foams to address the problem that powdery Li2TiO3 is difficult to be used in extracting lithium directly from the sea water and salt lake brine for engineering troubles. Hydrochloric acid was used to treat Li2TiO3 to obtain H2TiO3–lithium adsorbent. The results indicate that ceramic foams with a high open porosity are observed, and Li2TiO3 with particle size 80–100 nm is loaded on ceramic foams successfully. The Li+ drawn out ratio from Li2TiO3 reaches 50.2%, and the adsorptive capacity comes up to 21.0 mg g−1 after a treatment 24 h.
Liyuan Zhang; Dali Zhou; Gang He; Qianqian Yao; Fanhou Wang; Jiabei Zhou. Synthesis of H2TiO3–lithium adsorbent loaded on ceramic foams. Materials Letters 2015, 145, 351 -354.
AMA StyleLiyuan Zhang, Dali Zhou, Gang He, Qianqian Yao, Fanhou Wang, Jiabei Zhou. Synthesis of H2TiO3–lithium adsorbent loaded on ceramic foams. Materials Letters. 2015; 145 ():351-354.
Chicago/Turabian StyleLiyuan Zhang; Dali Zhou; Gang He; Qianqian Yao; Fanhou Wang; Jiabei Zhou. 2015. "Synthesis of H2TiO3–lithium adsorbent loaded on ceramic foams." Materials Letters 145, no. : 351-354.