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Dr. Muhammad Saeed
Government College University Faisalabad, 38000, Pakistan

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0 Chemistry
0 Green Chemistry
0 Physical Chemistry
0 Wastewater Treatment
0 Photocatalysis for pollutant degradation

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Preprint content
Published: 30 July 2021
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The synthesis of p-n heterojunction has received much attention in the eradication of organic pollutants from water. In this study, p-n CoO-ZnO heterojunction is reported as an efficient visible-light-driven photocatalyst for degradation of methylene blue. The formation of CoO-ZnO was determined by XRD, XPS, UV-vis DRS, SEM, and EDS analyses. The p-n CoO-ZnO prepared by precipitation method showed an enhanced photocatalytic activity under the irradiation of visible light compared to ZnO. A 100 mg/L methylene blue is degraded almost completely within 2 hours under visible irradiation. The enhanced photocatalytic efficiency is attributed to the synergistic effect of p-n heterojunction that dramatically reduces the recombination of holes and electrons initiated by irradiation. The role played by hydroxyl radicals in photodegradation of methylene blue was determined by photoluminescence emission and fluorescence spectroscopy.

ACS Style

Muhammad Saeed; Muhammad Adeel; Iltaf Khan; Nadia Akram; Majid Muneer. Synthesis of p-n CoO-ZnO Heterojunction for Enhanced Visible-Light Assisted Photodegradation of Methylene Blue. 2021, 1 .

AMA Style

Muhammad Saeed, Muhammad Adeel, Iltaf Khan, Nadia Akram, Majid Muneer. Synthesis of p-n CoO-ZnO Heterojunction for Enhanced Visible-Light Assisted Photodegradation of Methylene Blue. . 2021; ():1.

Chicago/Turabian Style

Muhammad Saeed; Muhammad Adeel; Iltaf Khan; Nadia Akram; Majid Muneer. 2021. "Synthesis of p-n CoO-ZnO Heterojunction for Enhanced Visible-Light Assisted Photodegradation of Methylene Blue." , no. : 1.

Journal article
Published: 19 May 2021 in Zeitschrift für Physikalische Chemie
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This study reports the fabrication of Fe2O3, Bi2O3, and BiFeO3, characterization and evaluation of the photocatalytic performances for methylene blue dye degradation. The materials were synthesized by precipitation method and characterized by scanning electron microscopy, X-ray diffraction, energy dispersive X-rays analyses, and Fourier transform infrared analyses. The photocatalytic activities of Fe2O3, Bi2O3, and BiFeO3 were compared by performing degradation experiments with 50 mL of 100 mg/L methylene blue solution. The as-prepared BiFeO3 was found as 2.4 times and 1.7 times more effective than Fe2O3 and Bi2O3, with a 79, 47, and 57% catalytic activity, respectively. The degradation of methylene blue over the BiFeO3 catalyst was optimized in terms of pH, catalyst dosage, temperature, and methylene blue concentration. The Eley–Rideal mechanism was proposed to describe the reaction kinetics in terms of the first order and second order kinetics model. Activation energy E (kJ/mol), enthalpy ΔH (kJ/mol), entropy ΔS (J/mol) and free energy ΔG (kJ/mol) were calculated as 20.8, 18.2, 197.5 and −45.3 respectively. The negative value of free energy shows that photodegradation is favored in present conditions.

ACS Style

Fiza Akram; Muhammad Saeed; Javaid Akhtar; Syed Ali Raza Naqvi; Atta Ul Haq. Fabrication and characterization of Fe2O3, Bi2O3 and BiFeO3 and evaluation of their photo catalytic performances on degradation of methylene blue dye. Zeitschrift für Physikalische Chemie 2021, 1 .

AMA Style

Fiza Akram, Muhammad Saeed, Javaid Akhtar, Syed Ali Raza Naqvi, Atta Ul Haq. Fabrication and characterization of Fe2O3, Bi2O3 and BiFeO3 and evaluation of their photo catalytic performances on degradation of methylene blue dye. Zeitschrift für Physikalische Chemie. 2021; ():1.

Chicago/Turabian Style

Fiza Akram; Muhammad Saeed; Javaid Akhtar; Syed Ali Raza Naqvi; Atta Ul Haq. 2021. "Fabrication and characterization of Fe2O3, Bi2O3 and BiFeO3 and evaluation of their photo catalytic performances on degradation of methylene blue dye." Zeitschrift für Physikalische Chemie , no. : 1.

Journal article
Published: 30 April 2021 in Coatings
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This work intended to enhance the unique and outstanding properties of lanthanum by synthesizing its nanocomposite. A lanthanum-based nanocomposite was prepared by a simple and cost-effective “co-precipitation” method. Lanthanum nitrate (La (NO3)3) and zinc nitrate (Zn (NO3)2) were used as precursors. The lanthanum/zinc oxide nano composite formed was then calcined at 450 °C for 4 h in order to obtain a fine powder with size in the nano range of 1–100 nm. Characterization of the prepared catalyst was done by ultraviolet/visible spectroscopy, Fourier transform infrared spectroscopy, and photoluminescence. Crystallinity and morphology were found by X-ray diffraction and scanning electron microscopy. The synthesized nanocomposite material was also tested for heterogeneous catalytic applications of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP). It was found to be successful in complete reduction of 4-NP with enhanced catalytic performance.

ACS Style

Ikram Ahmad; Muhammad Jamal; Miara Iftikhar; Awais Ahmad; Shahid Hussain; Humaira Asghar; Muhammad Saeed; Ammar Yousaf; Rama Karri; Nada Al-Kadhi; Mohamed Ouladsmane; Ayman Ghfar; Safia Khan. Lanthanum-Zinc Binary Oxide Nanocomposite with Promising Heterogeneous Catalysis Performance for the Active Conversion of 4-Nitrophenol into 4-Aminophenol. Coatings 2021, 11, 537 .

AMA Style

Ikram Ahmad, Muhammad Jamal, Miara Iftikhar, Awais Ahmad, Shahid Hussain, Humaira Asghar, Muhammad Saeed, Ammar Yousaf, Rama Karri, Nada Al-Kadhi, Mohamed Ouladsmane, Ayman Ghfar, Safia Khan. Lanthanum-Zinc Binary Oxide Nanocomposite with Promising Heterogeneous Catalysis Performance for the Active Conversion of 4-Nitrophenol into 4-Aminophenol. Coatings. 2021; 11 (5):537.

Chicago/Turabian Style

Ikram Ahmad; Muhammad Jamal; Miara Iftikhar; Awais Ahmad; Shahid Hussain; Humaira Asghar; Muhammad Saeed; Ammar Yousaf; Rama Karri; Nada Al-Kadhi; Mohamed Ouladsmane; Ayman Ghfar; Safia Khan. 2021. "Lanthanum-Zinc Binary Oxide Nanocomposite with Promising Heterogeneous Catalysis Performance for the Active Conversion of 4-Nitrophenol into 4-Aminophenol." Coatings 11, no. 5: 537.

Preprint content
Published: 26 April 2021
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Recently, the research on development of visible-light-active photocatalysts for photodegradation of organic pollutants has got much attention. Therefore, this study reports the synthesis of Co3O4-Bi2O3 heterojunction as visible-light responsive photocatalyst for photodegradation of rhodamine B dye. The Co3O4-Bi2O3 heterojunction was synthesized by coprecipitation method and characterized by XRD, EDS, SEM, TGA and FTIR. The as prepared Co3O4-Bi2O3 heterojunction was utilized as photocatalyst for photodegradation of rhodamine B dye using a 100 mg/L solution. It was observed that Co3O4-Bi2O3 showed best catalytic performance with ~ 92% degradation of rhodamine B dye than Co3O4 and Bi2O3 with 14 and 34% removal of rhodamine B dye, respectively. The rate constant for Co3O4-Bi2O3 catalyzed photodegradation of rhodamine B was 6 times and 3 times higher than rate constant for Co3O4 catalyzed and Bi2O3 catalyzed photodegradation of rhodamine B, respectively. The pH 8 was found as optimum pH for Co3O4-Bi2O3 catalyzed photodegradation of rhodamine B dye.

ACS Style

Muhammad Saeed; Afifa Baig; Muhammad Asghar Jamal; Nadia Akram; Tanveer Hussain Bokhari. Co3O4-Bi2O3 heterojunction; An effective photocatalyst for photodegradation of rhodamine B dye. 2021, 1 .

AMA Style

Muhammad Saeed, Afifa Baig, Muhammad Asghar Jamal, Nadia Akram, Tanveer Hussain Bokhari. Co3O4-Bi2O3 heterojunction; An effective photocatalyst for photodegradation of rhodamine B dye. . 2021; ():1.

Chicago/Turabian Style

Muhammad Saeed; Afifa Baig; Muhammad Asghar Jamal; Nadia Akram; Tanveer Hussain Bokhari. 2021. "Co3O4-Bi2O3 heterojunction; An effective photocatalyst for photodegradation of rhodamine B dye." , no. : 1.

Research article
Published: 20 March 2021 in Environmental Science and Pollution Research
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Photocatalytic treatment is one of the techniques used for the treatment of dyes-contaminated wastewater. It is important to develop an effective visible-light-driven catalyst for the treatment of dyes-contaminated wastewater. This study reports the synthesis of ZnO-reduced graphene oxide catalyst for the degradation of methylene blue. Graphene oxide was prepared by Hammer and Offeman process, while ZnO-rGO (1:1) was prepared by the chemical reduction method. The prepared ZnO-rGO composite was characterized by XRD, TEM, SEM, UV-Vis, DRS, N2 adsorption-desorption, FTIR, and XPS analyses. The photocatalytic activity was evaluated by photodegradation of methylene blue solution under irradiation. It was found that ZnO-rGO is capable of removing the dye from water and achieved the highest dye degradation efficiency of ~99% within 60 min. Furthermore, the ZnO-rGO was recycled in degradation experiments without any loss in its catalytic performance. The reaction kinetics was described in terms of the Langmuir-Hinshelwood mechanism, one of the kinetics mechanisms of surface catalyzed reaction. 36.2 and 13.1 kJ/mol were calculated as the apparent and true activation energy for photodegradation of methylene blue respectively.

ACS Style

Asif Nisar; Muhammad Saeed; Majid Muneer; Muhammad Usman; Iltaf Khan. Synthesis and characterization of ZnO decorated reduced graphene oxide (ZnO-rGO) and evaluation of its photocatalytic activity toward photodegradation of methylene blue. Environmental Science and Pollution Research 2021, 1 -13.

AMA Style

Asif Nisar, Muhammad Saeed, Majid Muneer, Muhammad Usman, Iltaf Khan. Synthesis and characterization of ZnO decorated reduced graphene oxide (ZnO-rGO) and evaluation of its photocatalytic activity toward photodegradation of methylene blue. Environmental Science and Pollution Research. 2021; ():1-13.

Chicago/Turabian Style

Asif Nisar; Muhammad Saeed; Majid Muneer; Muhammad Usman; Iltaf Khan. 2021. "Synthesis and characterization of ZnO decorated reduced graphene oxide (ZnO-rGO) and evaluation of its photocatalytic activity toward photodegradation of methylene blue." Environmental Science and Pollution Research , no. : 1-13.

Journal article
Published: 30 January 2021 in Polymers
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The exceptional behavior of graphene has not yet been entirely implicit in the polymer matrix. To explore this fact in the present work, two series of Polyurethan (PU) composites were synthesized. The structural modification was observed by the use of two different diisocyanate of methylene diisocyanate (MDI) and hexamethylene diisocyanate (HMDI) in hydroxylterminated polybutadiene (HTPB) by using I,4 Butane diol (BD) as the chain extender. The variation in hard segment up to 25 (wt.%) in both series led to significant changes in the mechanical behavior of graphene oxide (GO) induced composites. Both series were prepared by an in situ polymerization process. Fourier transform infrared (FTIR) analysis showed a peak in the region of 1700 cm−1, which confirmed the conversion of the NCO group into urethane linkages. Thermal gravimetric analysis (TGA) revealed a thermal stability up to 450 °C @ 90% weight loss. The swelling behavior showed the optimum uptake of 30% of water and 40% of dimethyl sulfoxide (DMSO) with aliphatic diisocyanate. The values of storage modulus (E′), complex modulus (E*), and compliance complex (D*) were observed up to 7 MPa, 8 Mpa, and 0.7 MPa−1, respectively. The degree of entanglement (N) values were calculated from DMA and were found in the range of 1.7 × 10−4 (mol/m3). Phase segregation of PU was observed by scanning electron microscopy (SEM), elucidating the morphology of composites.

ACS Style

Nadia Akram; Muhammad Saeed; Muhammad Usman; Asim Mansha; Fozia Anjum; Khalid Zia; Irfan Mahmood; Nida Mumtaz; Waheed Gul Khan. Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates. Polymers 2021, 13, 444 .

AMA Style

Nadia Akram, Muhammad Saeed, Muhammad Usman, Asim Mansha, Fozia Anjum, Khalid Zia, Irfan Mahmood, Nida Mumtaz, Waheed Gul Khan. Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates. Polymers. 2021; 13 (3):444.

Chicago/Turabian Style

Nadia Akram; Muhammad Saeed; Muhammad Usman; Asim Mansha; Fozia Anjum; Khalid Zia; Irfan Mahmood; Nida Mumtaz; Waheed Gul Khan. 2021. "Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates." Polymers 13, no. 3: 444.

Research article
Published: 05 January 2021 in ACS Omega
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Photocatalysis is one of the techniques used for the eradication of organic pollutants from wastewater. In this study, Co–ZnO was tested as a photocatalyst for the degradation of methyl orange under irradiation of visible light. Co–ZnO loaded with 5%, 10%, and 15% Co was prepared by the precipitation method. The advanced techniques including X-ray diffraction, X-ray photoelectron spectroscopy, diffuse reflectance UV–visible spectroscopy, photoelectrochemical measurements, temperature-programmed desorption, photoluminescence, and fluorescence spectroscopy related to OH• measurements were used for characterization of prepared Co–ZnO. Experiments showed that 10% Co–ZnO was a highly efficient catalyst for the photodegradation of methyl orange as compared to ZnO. The enhanced photocatalytic activity of Co–ZnO is attributed to the implantation of Co which inhibits the electron–hole recombination. A 100 mg/L solution of methyl orange dye was completely degraded within 130 min. The reaction kinetics has been described in terms of the Eley–Rideal mechanism.

ACS Style

Muhammad Adeel; Muhammad Saeed; Iltaf Khan; Majid Muneer; Nadia Akram. Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange. ACS Omega 2021, 6, 1426 -1435.

AMA Style

Muhammad Adeel, Muhammad Saeed, Iltaf Khan, Majid Muneer, Nadia Akram. Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange. ACS Omega. 2021; 6 (2):1426-1435.

Chicago/Turabian Style

Muhammad Adeel; Muhammad Saeed; Iltaf Khan; Majid Muneer; Nadia Akram. 2021. "Synthesis and Characterization of Co–ZnO and Evaluation of Its Photocatalytic Activity for Photodegradation of Methyl Orange." ACS Omega 6, no. 2: 1426-1435.

Remediation treatment
Published: 02 January 2021 in Environmental Progress & Sustainable Energy
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Nowadays, plants assisted green synthesis of metal oxide nanoparticles attracted the interest of researchers due to economic and environmental points of view. This article reports the Helianthus annuus (sunflower) leaves assisted green synthesis of Co3O4 and Ag‐Co3O4 particles. In this method, the leaves extract of Helianthus annuus (sunflower) is utilized as a reducing and stabilizing agent for the synthesis of Co3O4 and Ag‐Co3O4 particles. XRD and FTIR confirmed the crystalline and spinel phase of prepared Co3O4 and Ag‐Co3O4 particles. The catalytic activities of prepared particles were evaluated over the photodegradation of crystal violet dye under visible irradiation. About 63% and 98% of 100 mg/L degraded over 0.002 g/ml of Co3O4 and Ag‐Co3O4, respectively. The reaction kinetics and mechanism were described in terms of the Eley‐Rideal mechanism. The rate constant was determined as 0.0075 and 0.0167 per minute for Co3O4 and Ag‐Co3O4, respectively.

ACS Style

Muhammad Saeed; Atta Ul Haq; Majid Muneer; Muhammad Usman; Syed Ali Raza Naqvi; Muhammad Adeel; Asif Nisar. Helianthus annuus assisted green synthesis of Co 3 O 4 and Ag‐Co 3 O 4 and evaluation of their catalytic activities toward photodegradation of crystal violet dye. Environmental Progress & Sustainable Energy 2021, 1 .

AMA Style

Muhammad Saeed, Atta Ul Haq, Majid Muneer, Muhammad Usman, Syed Ali Raza Naqvi, Muhammad Adeel, Asif Nisar. Helianthus annuus assisted green synthesis of Co 3 O 4 and Ag‐Co 3 O 4 and evaluation of their catalytic activities toward photodegradation of crystal violet dye. Environmental Progress & Sustainable Energy. 2021; ():1.

Chicago/Turabian Style

Muhammad Saeed; Atta Ul Haq; Majid Muneer; Muhammad Usman; Syed Ali Raza Naqvi; Muhammad Adeel; Asif Nisar. 2021. "Helianthus annuus assisted green synthesis of Co 3 O 4 and Ag‐Co 3 O 4 and evaluation of their catalytic activities toward photodegradation of crystal violet dye." Environmental Progress & Sustainable Energy , no. : 1.

Journal article
Published: 20 November 2020 in Physica B: Condensed Matter
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In the present study, manganese oxide was synthesized via mechanochemical route, the surface of manganese oxide was modified by doping with zinc oxide. The synthesized material was characterized by SEM, TEM, XRD, EDX, FTIR and Surface area, and pore size analyzer. The catalyst was found to be active against the photocatalytic degradation of textile dye (MB). The Zn doped MnO was found to be superior photocatalyst than MnO against the dye in similar reaction conditions. Different reaction parameters such as pH, hydroxyl scavenger activity, reaction temperature, and initial dye concentration of the dye and amount of the catalyst were also screened for the photocatalytic degradation of Methylene blue dye (MB). The material was also used as a gas sensor for the detection of a toxic gas Xylene. The sensitivity of Zn doped MnO was found to be approximately four times better then the undoped manganese oxide. The optimum temperature for as grown and Zn doped MnO was found to be 260 °C and 240 °C respectively. The observed activity and selectivity of Zn doped MnO at a low temperature have proved to be an ideal sensing material for xylene vapours.

ACS Style

Mohsin Siddique; Naila Fayaz; Muhammad Saeed. Synthesis, characterization, photocatalytic activity and gas sensing properties of zinc doped manganese oxide nanoparticles. Physica B: Condensed Matter 2020, 602, 412504 .

AMA Style

Mohsin Siddique, Naila Fayaz, Muhammad Saeed. Synthesis, characterization, photocatalytic activity and gas sensing properties of zinc doped manganese oxide nanoparticles. Physica B: Condensed Matter. 2020; 602 ():412504.

Chicago/Turabian Style

Mohsin Siddique; Naila Fayaz; Muhammad Saeed. 2020. "Synthesis, characterization, photocatalytic activity and gas sensing properties of zinc doped manganese oxide nanoparticles." Physica B: Condensed Matter 602, no. : 412504.

Research article
Published: 11 November 2020 in Journal of Dispersion Science and Technology
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Micellar-enhanced ultrafiltration (MEUF) has proved itself to be a potentially attractive tool to remove contaminants from waste water. The reported study is particularly focused on the interaction and removal of cationic dye, Rhodamine B (RhB), using micellar solution of anionic surfactants, that is, Sodium dodecyl sulfate (SDS) and Sodium Oleate (SO). Dye removal efficiency has been assessed in terms of rejection percentage and permeate flux, using cellulose membrane of 10,000 molecular weight cutoff (MWCO). The effects of various factors, that is, ionic strength, concentration of surfactants, concentration of electrolyte, pH, operating pressure and rotations per minute (RPM) has been observed. It has been concluded that the maximum rejection of dye has been observed using micellar media of SDS. Overall, it has been observed that the rejection coefficient of dye is higher at higher concentration of surfactants and electrolyte and at lower values of pH, RPM and transmembrane pressure. Graphical Abstract

ACS Style

Amnah Yusaf; Muhammad Usman; Asim Mansha; Muhammad Saeed; Matloob Ahmad; Muhammad Siddiq. Micellar-enhanced ultrafiltration (MEUF) for removal of rhodamine B (RhB) from aqueous system. Journal of Dispersion Science and Technology 2020, 1 -13.

AMA Style

Amnah Yusaf, Muhammad Usman, Asim Mansha, Muhammad Saeed, Matloob Ahmad, Muhammad Siddiq. Micellar-enhanced ultrafiltration (MEUF) for removal of rhodamine B (RhB) from aqueous system. Journal of Dispersion Science and Technology. 2020; ():1-13.

Chicago/Turabian Style

Amnah Yusaf; Muhammad Usman; Asim Mansha; Muhammad Saeed; Matloob Ahmad; Muhammad Siddiq. 2020. "Micellar-enhanced ultrafiltration (MEUF) for removal of rhodamine B (RhB) from aqueous system." Journal of Dispersion Science and Technology , no. : 1-13.

Journal article
Published: 20 July 2020 in International Journal of Chemical Reactor Engineering
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Photo catalytic degradation of pollutants is one of the techniques used for treatment of dye contaminated wastewater. TiO2 has attracted much attention as photo catalyst for treatment of contaminated water. In this study, the photo catalytic performance of TiO2 has been enhanced by formation of p–n Co3O4-TiO2 hetero-junction. The p–n Co3O4-TiO2 hetero-junction was prepared by wet incipient impregnation method and characterized by various techniques. The photo catalytic activity of prepared composite was evaluated by photo degradation of methyl orange. The as prepared Co3O4-TiO2 composite was found as effective catalyst than Co3O4 and TiO2. The higher photo catalytic activity was attributed to p–n junction formed between Co3O4 and TiO2. The degradation data was analyzed according to Eley–Rideal mechanism in terms of 1st and 2nd order kinetics.

ACS Style

Muhammad Saeed; Muhammad Usman; Muhammad Ibrahim; Atta Ul Haq; Iltaf Khan; Hina Ijaz; Fiza Akram. Enhanced photo catalytic degradation of methyl orange using p–n Co3O4-TiO2 hetero-junction as catalyst. International Journal of Chemical Reactor Engineering 2020, 18, 1 .

AMA Style

Muhammad Saeed, Muhammad Usman, Muhammad Ibrahim, Atta Ul Haq, Iltaf Khan, Hina Ijaz, Fiza Akram. Enhanced photo catalytic degradation of methyl orange using p–n Co3O4-TiO2 hetero-junction as catalyst. International Journal of Chemical Reactor Engineering. 2020; 18 (5-6):1.

Chicago/Turabian Style

Muhammad Saeed; Muhammad Usman; Muhammad Ibrahim; Atta Ul Haq; Iltaf Khan; Hina Ijaz; Fiza Akram. 2020. "Enhanced photo catalytic degradation of methyl orange using p–n Co3O4-TiO2 hetero-junction as catalyst." International Journal of Chemical Reactor Engineering 18, no. 5-6: 1.

Paper
Published: 29 May 2020 in RSC Advances
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The geometric, thermodynamic and electronic properties of Pd–graphene nanocomposites are comprehensively studied through quantum mechanical methods.

ACS Style

Riaz Hussain; Muhammad Saeed; Muhammad Yasir Mehboob; Saif Ullah Khan; Muhammad Usman Khan; Muhammad Adnan; Mahmood Ahmed; Javed Iqbal; Khurshid Ayub. Density functional theory study of palladium cluster adsorption on a graphene support. RSC Advances 2020, 10, 20595 -20607.

AMA Style

Riaz Hussain, Muhammad Saeed, Muhammad Yasir Mehboob, Saif Ullah Khan, Muhammad Usman Khan, Muhammad Adnan, Mahmood Ahmed, Javed Iqbal, Khurshid Ayub. Density functional theory study of palladium cluster adsorption on a graphene support. RSC Advances. 2020; 10 (35):20595-20607.

Chicago/Turabian Style

Riaz Hussain; Muhammad Saeed; Muhammad Yasir Mehboob; Saif Ullah Khan; Muhammad Usman Khan; Muhammad Adnan; Mahmood Ahmed; Javed Iqbal; Khurshid Ayub. 2020. "Density functional theory study of palladium cluster adsorption on a graphene support." RSC Advances 10, no. 35: 20595-20607.

Article
Published: 28 May 2020 in International Journal of Chemical Kinetics
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Photodegradation of organic pollutants strongly depends on design of metal oxide semiconductor photocatalysts. Graphene, if composited with ZnO, can effectively enhance its photocatalytic performance for the eradication of pollutants from aqueous medium. Here in, ZnO‐rGO is reported as highly active catalyst for degradation of methylene blue. A 200‐mg/L solution of methylene blue dye was completely degraded within 1 h in comparison to 74% and 56% degradation over ZnO and rGO, respectively. The commonly used mechanisms of heterogeneous catalytic reactions, the Langmuir‐Hinshelwood mechanism, and the Eley‐Rideal mechanisms, were used to describe the reaction kinetics. The Langmuir‐Hinshelwood mechanism was found as more favorable in this study. Apparent activation energy, E ap, true activation energy, ET, entropy, ΔS , and enthalpy, ΔH were calculated as 36.2 kJ/mol, 13.1 kJ/mol, 197.5 J/mol, and 23.1 kJ/mol, respectively.

ACS Style

Asif Nisar; Muhammad Saeed; Muhammad Usman; Majid Muneer; Muhammad Adeel; Iltaf Khan; Javaid Akhtar. Kinetic modeling of ZnO‐rGO catalyzed degradation of methylene blue. International Journal of Chemical Kinetics 2020, 52, 645 -654.

AMA Style

Asif Nisar, Muhammad Saeed, Muhammad Usman, Majid Muneer, Muhammad Adeel, Iltaf Khan, Javaid Akhtar. Kinetic modeling of ZnO‐rGO catalyzed degradation of methylene blue. International Journal of Chemical Kinetics. 2020; 52 (10):645-654.

Chicago/Turabian Style

Asif Nisar; Muhammad Saeed; Muhammad Usman; Majid Muneer; Muhammad Adeel; Iltaf Khan; Javaid Akhtar. 2020. "Kinetic modeling of ZnO‐rGO catalyzed degradation of methylene blue." International Journal of Chemical Kinetics 52, no. 10: 645-654.

Chapter
Published: 06 May 2020 in Bioremediation and Biotechnology, Vol 2
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The textile industries which utilize a huge amount of dyes contribute a significant part in aqueous pollution in terms of chemical composition and volume of the discharged effluent. The effluents of textile industry contain a number of pollutants including a variety of organic dyes. These dyes are carcinogenic and impart color to aqueous body which prevents the solar radiation penetration inside the water body. Various experimental protocols have been used for treatment of these industrial effluents which include physical, chemical, acoustical and biological methods. However, these methods are not much effective. Photo catalysis is the most effective technique for treatment of these industrial effluents which completely degrade the toxic organic pollutants and dyes. This is one of the techniques called as advanced oxidation processes, AOPs. This report presents a review on photo catalysis of aqueous phase dyes.

ACS Style

Muhammad Saeed; Shahid Adeel; Majid Muneer; Atta Ul Haq. Photo Catalysis: An Effective Tool for Treatment of Dyes Contaminated Wastewater. Bioremediation and Biotechnology, Vol 2 2020, 175 -187.

AMA Style

Muhammad Saeed, Shahid Adeel, Majid Muneer, Atta Ul Haq. Photo Catalysis: An Effective Tool for Treatment of Dyes Contaminated Wastewater. Bioremediation and Biotechnology, Vol 2. 2020; ():175-187.

Chicago/Turabian Style

Muhammad Saeed; Shahid Adeel; Majid Muneer; Atta Ul Haq. 2020. "Photo Catalysis: An Effective Tool for Treatment of Dyes Contaminated Wastewater." Bioremediation and Biotechnology, Vol 2 , no. : 175-187.

Journal article
Published: 24 April 2020 in Bulletin of the Chemical Society of Ethiopia
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Fe3O4 known as magnetite is one of the oxides of iron which plays a major role in various fields of sciences. Fe3O4 was synthesized by precipitation method using NH3.H2O, FeCl2.4H2O and FeCl3.6H2O as precursor materials. For synthesis of 5% Ag-Fe3O4, the green synthetic method was used for immobilization of Ag nanoparticles on Fe3O4 using leaves extract of Calotropis gigantea plant. The synthesized Fe3O4 and 5% Ag-Fe3O4 were employed as catalyst in degradation of methylene blue. The photo catalytic activity of Fe3O4 was remarkably enhanced by doping of Fe3O4 with Ag nanoparticles. Advanced instrumental techniques including XRD, EDX, TGA and SEM were used for characterization of synthesized particles. The immobilization of Ag on Fe3O4 enhanced the photo degradation of methylene blue from 40 to 72% at 40 °C which confirms that 5% Ag-Fe3O4 is an active catalyst for treatment of dye contaminated water. Ag-Fe3O4 exhibited almost same catalytic activity in two successive cycles. Bull. Chem. Soc. Ethiop. 2020, 34(1), 123-134. DOI: https://dx.doi.org/10.4314/bcse.v34i1.11

ACS Style

Muhammad Saeed; Muhammad Usman; Majid Muneer; Nadia Akram; Atta Ul Haq; Muhammad Tariq; Fiza Akram. Synthesis of Ag-Fe3O4 nanoparticles for degradation of methylene blue in aqueous medium. Bulletin of the Chemical Society of Ethiopia 2020, 34, 123 -134.

AMA Style

Muhammad Saeed, Muhammad Usman, Majid Muneer, Nadia Akram, Atta Ul Haq, Muhammad Tariq, Fiza Akram. Synthesis of Ag-Fe3O4 nanoparticles for degradation of methylene blue in aqueous medium. Bulletin of the Chemical Society of Ethiopia. 2020; 34 (1):123-134.

Chicago/Turabian Style

Muhammad Saeed; Muhammad Usman; Majid Muneer; Nadia Akram; Atta Ul Haq; Muhammad Tariq; Fiza Akram. 2020. "Synthesis of Ag-Fe3O4 nanoparticles for degradation of methylene blue in aqueous medium." Bulletin of the Chemical Society of Ethiopia 34, no. 1: 123-134.

Journal article
Published: 23 April 2020 in Journal of Chemistry
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In this study, we are presenting the effect of three ripening stages of air-dried bitter gourd fruit extracts on phenolic acid composition, antioxidant, antibacterial, and anticancer activities. The results showed mature bitter gourd fruit extract in 100% methanol showing 78% DPPHº scavenging activity. Immature dried fruit extract in 80% and 100% methanol showed promising antibacterial activities, i.e., >18.5 ± 0.21 mm zone-of-inhibition against Staphylococcus aureus, while mature dried fruit extract in 80% methanol showed 18.4 ± 0.17 mm zone-of-inhibition against Escherichia coli. Anticancer activity results of 100% methanol extracts of ripened fruit possess showed 6.72 ± 1.81 and 3.55 ± 0.51 mg/mL IC50 values with HeLa and MDBK cancer cell lines, respectively. The overall results indicate that the immature and ripen fruits of BG could be extracted in pure methanol as an antibacterial and anticancer phytomedicine.

ACS Style

Syed Ali Raza Naqvi; Shafaqat Ali; Tauqir A. Sherazi; Atta-Ul Haq; Muhammad Saeed; Muhammad Sulman; Muhammad Rizwan; Saad Alkahtani; Mohamed M. Abdel-Daim. Antioxidant, Antibacterial, and Anticancer Activities of Bitter Gourd Fruit Extracts at Three Different Cultivation Stages. Journal of Chemistry 2020, 2020, 1 -10.

AMA Style

Syed Ali Raza Naqvi, Shafaqat Ali, Tauqir A. Sherazi, Atta-Ul Haq, Muhammad Saeed, Muhammad Sulman, Muhammad Rizwan, Saad Alkahtani, Mohamed M. Abdel-Daim. Antioxidant, Antibacterial, and Anticancer Activities of Bitter Gourd Fruit Extracts at Three Different Cultivation Stages. Journal of Chemistry. 2020; 2020 ():1-10.

Chicago/Turabian Style

Syed Ali Raza Naqvi; Shafaqat Ali; Tauqir A. Sherazi; Atta-Ul Haq; Muhammad Saeed; Muhammad Sulman; Muhammad Rizwan; Saad Alkahtani; Mohamed M. Abdel-Daim. 2020. "Antioxidant, Antibacterial, and Anticancer Activities of Bitter Gourd Fruit Extracts at Three Different Cultivation Stages." Journal of Chemistry 2020, no. : 1-10.

Journal article
Published: 20 April 2020 in Journal of Molecular Liquids
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Sweetness behavior of a carbohydrate namely maltose was studied in the presence of amino acids (L-alanine and L-arginine) in terms of volumetric and acoustic properties of their solutions. Density (ρ) and ultrasonic velocity (μ) of maltose in different concentrations of amino acids solutions were measured at temperatures 293.15 K, 303.15 K and 313.15 K. Calculated volumetric and acoustic parameters such as apparent molar compressibility, specific molar volume and expansibility factor etc. were explored in terms of molecular interactions present in carbohydrate-amino acid solutions. Obtained results of transfer volume of maltose from aqueous to amino acid systems indicated the presence of ion-ion, ion-polar and hydrophobic–hydrophobic interactions in solutions, which was also confirmed from obtained positive values of apparent molar volume and negative values of apparent molar isentropic compressibility. Calculated value of apparent specific volumes i.e. 0.618 cm3g−1 lies in the range of 0.51 cm3g−1 to 0.71cm3g−1 for sweetness response indicated the sweetness behavior of maltose in aqueous amino acids solutions.

ACS Style

Muhammad Asghar Jamal; Bushra Naseem; Sadaf Naz; Iqra Arif; Muhammad Saeed; Sana Atiq. Thermo-acoustic properties of maltose in aqueous amino acids system. Journal of Molecular Liquids 2020, 309, 112932 .

AMA Style

Muhammad Asghar Jamal, Bushra Naseem, Sadaf Naz, Iqra Arif, Muhammad Saeed, Sana Atiq. Thermo-acoustic properties of maltose in aqueous amino acids system. Journal of Molecular Liquids. 2020; 309 ():112932.

Chicago/Turabian Style

Muhammad Asghar Jamal; Bushra Naseem; Sadaf Naz; Iqra Arif; Muhammad Saeed; Sana Atiq. 2020. "Thermo-acoustic properties of maltose in aqueous amino acids system." Journal of Molecular Liquids 309, no. : 112932.

Journal article
Published: 31 January 2020 in Environmental Progress & Sustainable Energy
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Muhammad Saeed; Mohsin Siddique; Muhammad Ibrahim; Nadia Akram; Muhammad Usman; Muhammad A. Aleem; Afifa Baig. Calotropis gigantea leaves assisted biosynthesis of ZnO and [email protected] catalysts for degradation of rhodamine B dye in aqueous medium. Environmental Progress & Sustainable Energy 2020, 39, 1 .

AMA Style

Muhammad Saeed, Mohsin Siddique, Muhammad Ibrahim, Nadia Akram, Muhammad Usman, Muhammad A. Aleem, Afifa Baig. Calotropis gigantea leaves assisted biosynthesis of ZnO and [email protected] catalysts for degradation of rhodamine B dye in aqueous medium. Environmental Progress & Sustainable Energy. 2020; 39 (4):1.

Chicago/Turabian Style

Muhammad Saeed; Mohsin Siddique; Muhammad Ibrahim; Nadia Akram; Muhammad Usman; Muhammad A. Aleem; Afifa Baig. 2020. "Calotropis gigantea leaves assisted biosynthesis of ZnO and [email protected] catalysts for degradation of rhodamine B dye in aqueous medium." Environmental Progress & Sustainable Energy 39, no. 4: 1.

Journal article
Published: 01 January 2020 in Dose-Response
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Multidrug resistance has increased globally in the communities. Bacterial infections associated with health care have weakened the existing antimicrobial therapy and demand the search for alternative therapies. In the present investigation, the medicinal plant Pulicaria gnaphalodes from Quetta, Pakistan, has been screened for antimicrobial potential. In vitro antimicrobial efficacy of P gnaphalodes extracts (methanol and ethanol) was quantitatively evaluated on the basis of zone of inhibition against different bacteria and minimum inhibitory concentration (MIC). In vivo, antihypercholesterolemic activity is determined in different rat groups. The results of the study indicated that the ethanol extract of P gnaphalodes showed maximum zone of inhibition for Bacillus subtilis of 12.1 ± 1.1 mm from all others. The methanol extract showed maximum zone of inhibition for Staphylococcus aureus of 11.9 ± 1.0 mm and rifampicin showed maximum zone of inhibition of 23.1 ± 0.9 mm. The results of ethanol and methanol extract of P gnaphalodes against different bacteria revealed that this plant has greater antimicrobial activity. However, the plant extract shows nonsignificant antihypercholesterolemic activity. The extract of this plant can be utilized as medicine to inhibit several infections caused by some bacterial pathogens found in human body.

ACS Style

Syed Ali Raza Naqvi; Syed Muhammad Ali Shah; Laiba Kanwal; Muhammad Saeed; Jaweria Nisar; Zonaira Nisar; Muhammad Akram; Atta- Ul- Haq. Antimicrobial and Antihypercholesterolemic Activities of Pulicaria gnaphalodes. Dose-Response 2020, 18, 1 .

AMA Style

Syed Ali Raza Naqvi, Syed Muhammad Ali Shah, Laiba Kanwal, Muhammad Saeed, Jaweria Nisar, Zonaira Nisar, Muhammad Akram, Atta- Ul- Haq. Antimicrobial and Antihypercholesterolemic Activities of Pulicaria gnaphalodes. Dose-Response. 2020; 18 (1):1.

Chicago/Turabian Style

Syed Ali Raza Naqvi; Syed Muhammad Ali Shah; Laiba Kanwal; Muhammad Saeed; Jaweria Nisar; Zonaira Nisar; Muhammad Akram; Atta- Ul- Haq. 2020. "Antimicrobial and Antihypercholesterolemic Activities of Pulicaria gnaphalodes." Dose-Response 18, no. 1: 1.

Journal article
Published: 01 January 2020 in Desalination and Water Treatment
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Muhammad Imran Kanjal; Majid Muneer; Ijaz Ahmad Bhatti; Muhammad Saeed; Atta-Ul-Haq Atta-Ul-Haq; Nighat Zia Ud Den; Ehsan Ul Haq; Jan Nisar; Munawar Iqbal. Gamma and UV radiation induced degradation of methotrexate (anti-rheumatic drug) in aqueous solution and conditions optimization. Desalination and Water Treatment 2020, 191, 332 -341.

AMA Style

Muhammad Imran Kanjal, Majid Muneer, Ijaz Ahmad Bhatti, Muhammad Saeed, Atta-Ul-Haq Atta-Ul-Haq, Nighat Zia Ud Den, Ehsan Ul Haq, Jan Nisar, Munawar Iqbal. Gamma and UV radiation induced degradation of methotrexate (anti-rheumatic drug) in aqueous solution and conditions optimization. Desalination and Water Treatment. 2020; 191 ():332-341.

Chicago/Turabian Style

Muhammad Imran Kanjal; Majid Muneer; Ijaz Ahmad Bhatti; Muhammad Saeed; Atta-Ul-Haq Atta-Ul-Haq; Nighat Zia Ud Den; Ehsan Ul Haq; Jan Nisar; Munawar Iqbal. 2020. "Gamma and UV radiation induced degradation of methotrexate (anti-rheumatic drug) in aqueous solution and conditions optimization." Desalination and Water Treatment 191, no. : 332-341.