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Photosynthesis of Au/TiO 2 nanoparticles for photocatalytic gold recovery from industrial gold-cyanide plating wastewater. Sci Rep 2022; 12:21956. [PMID: 36535954 PMCID: PMC9763252 DOI: 10.1038/s41598-022-24290-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/14/2022] [Indexed: 12/23/2022] Open
Abstract
A series of Aux/TiO2 nanoparticles (NPs) with different gold loadings (x = 0.1-1.0 wt%) was synthesized by the photodeposition and then employed as photocatalysts to recover precious component from the industrial gold-cyanide plating wastewater. Effects of Au loading, catalyst dosage and types of hole scavenger on the photocatalytic gold recovery were investigated under ultraviolet-visible (UV-Vis) light irradiation at room temperature. It was found that different Au loadings tuned the light absorption capacity of the synthesized photocatalysts and enhanced the photocatalytic activity in comparison with the bare TiO2 NPs. The addition of CH3OH, C2H5OH, C3H8O, and Na2S2O3 as a hole scavenger significantly promoted the photocatalytic activity of the gold recovery, while the H2O2 did not. Among different hole scavengers employed in this work, the CH3OH exhibited the highest capability to promote the photocatalytic gold recovery. In summary, the Au0.5/TiO2 NPs exhibited the best photocatalytic activity to completely recover gold ions within 30 min at the catalyst dosage of 0.5 g/L, light intensity of 3.20 mW/cm2 in the presence of 20 vol% CH3OH as hole scavenger. The photocatalytic activity slightly decreased after the 5th cycle of recovery process, indicating its high reusability.
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2
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A Parametric Study of the Crystal Phases on Au/TiO2 Photocatalysts for CO2 Gas-Phase Reduction in the Presence of Water. Catalysts 2022. [DOI: 10.3390/catal12121623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Au/TiO2 photocatalysts were studied, characterized, and compared for CO2 photocatalytic gas-phase reduction. The impact of the nature of the TiO2 support was studied. It was shown that the surface area/porosity/TiO2 crystal phase/density of specific exposed facets and oxygen vacancies were the key factors determining CH4 productivity under solar-light activation. A 0.84 wt.% Au/TiO2 SG (Sol Gel) calcined at 400 °C exhibited the best performance, leading to a continuous mean CH4 production rate of 50 μmol.h−1.g−1 over 5 h, associated with an electronic selectivity of 85%. This high activity was mainly attributed to the large surface area and accessible microporous volume, high density of exposed TiO2 (101) anatase facets, and oxygen vacancies acting as reactive defects sites for CO2 adsorption/activation/dissociation and charge carrier transport.
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3
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Gao H, Liu H, Lin C, Sha L, Yang Y, Zhuang G, Wang X, Zhan W, Han X. Immobilization of AgCl/Pd Heterojunctions on Nitrogen‐Doped Carbon Nanotubes: Interfacial Design‐Induced Electronic Regulation Enhances Photocatalytic Activity. Chemistry 2022; 28:e202202433. [DOI: 10.1002/chem.202202433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Hao Gao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Huade Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Cunbiao Lin
- Laboratory of Molecular Catalysis & Computational Materials Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Linna Sha
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Yun Yang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Guilin Zhuang
- Laboratory of Molecular Catalysis & Computational Materials Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Xiaojun Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Wenwen Zhan
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
| | - Xiguang Han
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of Chemistry School of Chemistry and Chemical Engineering Jiangsu Normal University Xuzhou 221116 P. R. China
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4
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Photocatalytic H2 Production on Au/TiO2: Effect of Au Photodeposition on Different TiO2 Crystalline Phases. J 2022. [DOI: 10.3390/j5010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this work, we investigated the role of the crystalline phases of titanium dioxide in the solar photocatalytic H2 production by the reforming of glycerol, focusing the attention on the influence of photodeposited gold, as a metal co-catalyst, on TiO2 surface. We correlated the photocatalytic activity of 1 wt% Au/TiO2 in anatase, rutile, and brookite phases with the structural and optical properties determined by Raman spectroscopy, N2 adsorption–desorption measurements, UV–vis Diffuse Reflectance Spectroscopy (UV–vis DRS), X-ray photoelectron spectroscopy (XPS), Photoluminescence spectroscopy (PL), and Dynamic Light scattering (DLS). The best results (2.55 mmol H2 gcat−1 h−1) were obtained with anatase and gold photodeposited after 30 min of solar irradiation. The good performance of Au/TiO2 in anatase form and the key importance of the strong interaction between gold and the peculiar crystalline phase of TiO2 can be a starting point to efficiently improve photocatalysts design and experimental conditions, in order to favor a green hydrogen production through solar photocatalysis.
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5
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Shen Y, Wang L, Xu Z, Ning F, Zhan Y, Bai C, Zhou X. Low-Temperature Methanol-Water Reforming Over Alcohol Dehydrogenase and Immobilized Ruthenium Complex. CHEMSUSCHEM 2021; 14:3867-3875. [PMID: 34310047 DOI: 10.1002/cssc.202101240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Hydrogen is one of the most promising sustainable energy carriers for its high gravimetric energy density and abundance. Nowadays, hydrogen production and storage are the main constraints for its commercialization. As a current research focus, hydrogen production from methanol-water reforming, especially at low temperature, is particularly important. In this study, a novel reaction path for low-temperature methanol reforming through synergistic catalysis was developed. Alcohol dehydrogenase (ADH) and coenzyme I (nicotinamide adenine dinucleotide, NAD+ ) were employed for methanol catalytic dehydrogenation at low temperature, which could generate formaldehyde and reductive coenzyme I (NADH). Covalent triazine framework-immobilized ruthenium complex (Ru-CTF) was prepared afterwards. On one hand, the catalyst exhibited high activity for the formaldehyde-water shift reaction to generate hydrogen and carbon dioxide. On the other hand, the NADH dehydrogenation was also catalyzed by the Ru-CTF, producing NAD+ and hydrogen. Additionally, the catalyst also showed high biocompatibility with ADH. Through the synergistic effect of the above two main processes, methanol could be converted into hydrogen and carbon dioxide stably at low temperature for more than 96 h. The hydrogen production rate was dependent on the pH of the reaction solution as well as the ADH dosage. A hydrogen production rate of 157 mmol h-1 mol-1 Ru was achieved at the optimum pH (8.1). Additionally, the hydrogen production rate increased linearly with the ADH dosage, reaching 578 mmol h-1 mol-1 Ru when the ADH dosage was 180 U at 35 °C. This research could not only help overcome the difficulties for methanol reforming near room temperature but also give new inspiration for designing new reaction pathways for methanol reforming.
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Affiliation(s)
- Yangbin Shen
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Luqi Wang
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Ziwen Xu
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Fandi Ning
- Division of Advanced Nanomaterials, Institution Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Yulu Zhan
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Chuang Bai
- Division of Advanced Nanomaterials, Institution Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
| | - Xiaochun Zhou
- Division of Advanced Nanomaterials, Institution Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China
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6
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Abdullah H, Siburian R, Pasaribu SP, Panggabean AS. Visible‐Light Driven Ni‐Incorporated CdS Photocatalytic Activities for Azo‐Bond Cleavages with Hydrogenation Reaction. ChemistrySelect 2021. [DOI: 10.1002/slct.202004214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hairus Abdullah
- Department of Industrial Engineering Universitas Prima Indonesia Medan Indonesia
| | - Rikson Siburian
- Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Medan 20155 Indonesia
| | - Subur P. Pasaribu
- Department of Chemistry Faculty of Mathematics and Natural Sciences Mulawarman University Samarinda 75123 Indonesia
| | - Aman S. Panggabean
- Department of Chemistry Faculty of Mathematics and Natural Sciences Mulawarman University Samarinda 75123 Indonesia
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7
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Abdullah H, Shuwanto H, Kuo DH. Multifunctional Ni–Mg bimetal-activated Zn(O,S) for hydrogen generation and environmental remediation with simulated solar-light irradiation. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00977j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
NMZ-S10 is a powerful and robust photocatalyst that is capable of conducting the hydrogen evolution reaction, chromium (Cr6+) reduction, mixed-dye degradation, and hydrogenation reaction under solar light illumination.
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Affiliation(s)
- Hairus Abdullah
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taiwan
| | - Hardy Shuwanto
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taiwan
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taiwan
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8
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Abdullah H, Ginting RT, Sembiring AC, Gultom NS, Shuwanto H, Kuo DH. One-pot preparation of multicomponent photocatalyst with (Zn, Co, Ni)(O, S)/Ga2O3 nanocomposites to significantly enhance hydrogen production. NEW J CHEM 2021. [DOI: 10.1039/d1nj02980k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To enhance the production of hydrogen, multicomponent photocatalyst (Zn, Co, Ni)(O, S)/Ga2O3 nanocomposites were synthesized and optimized with different amounts of Ga precursor in a relatively low-temperature process.
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Affiliation(s)
- Hairus Abdullah
- Department of Industrial Engineering, Universitas Prima Indonesia, Medan, Indonesia
| | - Riski Titian Ginting
- Department of Electrical Engineering, Universitas Prima Indonesia, Medan, Indonesia
| | | | - Noto Susanto Gultom
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Taipei 10607, Taiwan
| | - Hardy Shuwanto
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Taipei 10607, Taiwan
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No. 43, Section 4, Keelung Road, Taipei 10607, Taiwan
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Sharma A, Thuan DV, Pham TD, Tung MHT, Truc NTT, Vo DVN. Advanced Surface of Fibrous Activated Carbon Immobilized with FeO/TiO
2
for Photocatalytic Evolution of Hydrogen under Visible Light. Chem Eng Technol 2020. [DOI: 10.1002/ceat.201900338] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ajit Sharma
- Lovely Professional UniversityChemical Engineering and Physical Science Phagwara Punjab India
| | - Doan Van Thuan
- Nguyen Tat Thanh UniversityNTT Hi-Tech Institute 700000 Ho Chi Minh City Vietnam
| | - Thanh-Dong Pham
- VNU University of Science, Vietnam National University, HanoiFaculty of Chemistry 334 Nguyen Trai, Thanh Xuan Hanoi Vietnam
- VNU University of Science, Vietnam National University, HanoiVNU Key Laboratory of Advanced Materials for Green Growth 334 Nguyen Trai, Thanh Xuan Hanoi Vietnam
| | - Mai Hung Thanh Tung
- Ho Chi Minh City University of Food IndustryFaculty of Chemical Engineering 140 Le Trong Tan Ho Chi Minh City Vietnam
| | - Nguyen Thi Thanh Truc
- Ton Duc Thang UniversityFaculty of Environment and Labour Safety Ho Chi Minh City Vietnam
| | - Dai-Viet N. Vo
- Nguyen Tat Thanh UniversityCenter of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN) 300A Nguyen Tat Thanh, District 4 755414 Ho Chi Minh City Vietnam
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10
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11
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Gultom NS, Abdullah H, Kuo DH. Concept of Stagnant Capillarity Water in the Nanoporous SiO 2@(Zn,Ni)(O,S) Nanocomposite Photocatalyst as a Strategy to Improve Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27760-27769. [PMID: 31298528 DOI: 10.1021/acsami.9b06795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
(Zn,Ni)(O,S) nanoparticles were uniformly deposited on nanoporous SiO2 spheres to form SiO2@(Zn,Ni)(O,S) nanocomposites (NCs). To obtain optimum deposition of (Zn,Ni)(O,S) on the SiO2 spheres for the hydrogen evolution reaction (HER), different amounts of 0.25, 0.5, 1, and 1.5 mmol zinc precursor for (Zn,Ni)(O,S) were deposited on SiO2 to obtain different SiO2@(Zn,Ni)(O,S) NCs. All the as-prepared catalysts were examined with X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, electrochemical impedance spectroscopy, photocurrent response, photoluminescence spectral studies. Finally, the HER performance was evaluated with SiO2@(Zn,Ni)(O,S). The best SiO2@(Zn,Ni)(O,S)-0.5 surprisingly reached 41.1 mmol/gh for generating H2, which was about a 840% increase as compared to that of the SiO2 sphere-free one. The great improvement in the HER rate was due to the utilization of nanoporous SiO2 spheres. The concept of stagnant capillarity water, adopted from the leaf vein system, was applied to explain the enhanced HER reaction.
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Affiliation(s)
- Noto Susanto Gultom
- Department of Materials Science and Engineering , National Taiwan University of Science and Technology , No. 43, Sec. 4, Keelung Road , Taipei 10607 , Taiwan
| | - Hairus Abdullah
- Department of Materials Science and Engineering , National Taiwan University of Science and Technology , No. 43, Sec. 4, Keelung Road , Taipei 10607 , Taiwan
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering , National Taiwan University of Science and Technology , No. 43, Sec. 4, Keelung Road , Taipei 10607 , Taiwan
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12
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Wang R, Qiu G, Xiao Y, Tao X, Peng W, Li B. Optimal construction of WO3·H2O/Pd/CdS ternary Z-scheme photocatalyst with remarkably enhanced performance for oxidative coupling of benzylamines. J Catal 2019. [DOI: 10.1016/j.jcat.2019.05.016] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Bardey S, Bonduelle-Skrzypczak A, Fécant A, Cui Z, Colbeau-Justin C, Caps V, Keller V. Plasmonic photocatalysis applied to solar fuels. Faraday Discuss 2019; 214:417-439. [DOI: 10.1039/c8fd00144h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We show the impact of structural, chemical and interfacial features of gold–titania composites on solar and visible photocatalytic gas phase reduction of CO2 and the specificities of the hot electron-based process.
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Affiliation(s)
- Steven Bardey
- Institut de Chimie et des Procédés pour l’Energie, l’Environnement et la Santé (ICPEES)
- UMR7515
- 67087 Strasbourg
- France
- IFP Energies Nouvelles (IFPEN)
| | | | | | - Zhenpeng Cui
- Laboratoire de Chimie Physique
- CNRS UMR 8000
- Univ. Paris-Sud
- Université Paris-Saclay
- 91405 Orsay
| | | | - Valérie Caps
- Institut de Chimie et des Procédés pour l’Energie, l’Environnement et la Santé (ICPEES)
- UMR7515
- 67087 Strasbourg
- France
| | - Valérie Keller
- Institut de Chimie et des Procédés pour l’Energie, l’Environnement et la Santé (ICPEES)
- UMR7515
- 67087 Strasbourg
- France
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14
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Rao KTV, Rogers JL, Souzanchi S, Dessbesell L, Ray MB, Xu CC. Inexpensive but Highly Efficient Co-Mn Mixed-Oxide Catalysts for Selective Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid. CHEMSUSCHEM 2018; 11:3323-3334. [PMID: 30006949 DOI: 10.1002/cssc.201800989] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 06/19/2018] [Indexed: 06/08/2023]
Abstract
A highly active and inexpensive Co-Mn mixed-oxide catalyst was prepared and used for selective oxidation of 5-hydroxymethylfurfural (HMF) into 2, 5-furandicarboxylic acid (FDCA). Co-Mn mixed-oxide catalysts with different Co/Mn molar ratios were prepared through a simple solid-state grinding method-a low-cost and green catalyst preparation method. The activity of these catalysts was evaluated for selective aerobic oxidation of HMF into FDCA in water. Excellent HMF conversion (99 %) and FDCA yield (95 % ) were obtained under the best reaction conditions (i.e., 120 °C, 5 h, Co-Mn mixed-oxide catalyst with a Co/Mn molar ratio of 0.25 calcined at 300 °C (Co-Mn-0.25) and 1 MPa O2 ). The catalyst could be reused five times without a significant decrease in activity. The results demonstrated that the catalytic activity and selectivity of the Co-Mn mixed-oxide catalysts prepared through solid-state grinding were superior to the same Co-Mn catalyst prepared through a conventional coprecipitation method. The high catalytic activity of the Co-Mn-0.25 catalyst was attributed to its high lattice oxygen mobility and the presence of different valence states of manganese. The high activity and low cost of the Co-Mn mixed-oxide catalysts prepared by solid-state grinding make it promising for industrial application for the manufacturing of polyethylene furanoate, a bioreplacement for polyethylene terephthalate, from sustainable bioresources.
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Affiliation(s)
| | - Jennifer Lorraine Rogers
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
| | - Sadra Souzanchi
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
| | - Luana Dessbesell
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
| | - Madhumita Bhowmick Ray
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
| | - Chunbao Charles Xu
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada
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15
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Liu B, Louis M, Jin L, Li G, He J. Co‐Template Directed Synthesis of Gold Nanoparticles in Mesoporous Titanium Dioxide. Chemistry 2018; 24:9651-9657. [DOI: 10.1002/chem.201801223] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Ben Liu
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
- Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional Materials School of Chemistry and Materials Science Nanjing Normal University Nanjing 210023 P. R. China
| | - Michael Louis
- Department of Chemistry University of New Hampshire Durham NH 03824 USA
| | - Lei Jin
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
| | - Gonghu Li
- Department of Chemistry University of New Hampshire Durham NH 03824 USA
| | - Jie He
- Department of Chemistry University of Connecticut Storrs CT 06269 USA
- Institute of Materials Science University of Connecticut Storrs CT 06269 USA
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16
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Zada A, Qu Y, Ali S, Sun N, Lu H, Yan R, Zhang X, Jing L. Improved visible-light activities for degrading pollutants on TiO 2/g-C 3N 4 nanocomposites by decorating SPR Au nanoparticles and 2,4-dichlorophenol decomposition path. JOURNAL OF HAZARDOUS MATERIALS 2018; 342:715-723. [PMID: 28917200 DOI: 10.1016/j.jhazmat.2017.09.005] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/01/2017] [Accepted: 09/05/2017] [Indexed: 06/07/2023]
Abstract
It has been clearly demonstrated that the visible-light photocatalytic activities of g-C3N4 (CN) for degrading 2,4-dichlorophenol (2,4-DCP) and bisphenol A (BPA) could be improved by fabricating nanocomposites with a proper amount of nanocrystalline anatase TiO2. Interestingly, the visible-light activities of the amount-optimized nanocomposite could be further improved after decorating Au nanoparticles, with 5.11- and 3.1-time improvement respectively for 2,4-DCP and BPA compared to that of CN, even much higher than that of P25 TiO2 under UV-vis irradiation. Based on the transient-state surface photovoltage responses and photoelectrochemical measurements, it is confirmed that the exceptional visible-light activities of the fabricated Au-(TiO2/g-C3N4) nanocomposites are attributed to the extended visible-light response due to the surface plasmonic resonance (SPR) of decorated Au and its catalytic function, and to the enhanced charge separation by transferring electrons from CN and SPR Au to TiO2 in the nanocomposites. The highly promoted charge separation results in the effective availability of a large number of hydroxyl radicals (OH) participating in the photocatalytic oxidation process of 2,4-DCP. Furthermore, a possible mechanism of 2,4-DCP degradation is proposed according to the detailed analyses of produced intermediates. This work provides new idea for designing Au assisted nanocomposite photocatalysts for environmental remediation.
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Affiliation(s)
- Amir Zada
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Yang Qu
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Sharafat Ali
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Ning Sun
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Hongwei Lu
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Rui Yan
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Xuliang Zhang
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China
| | - Liqiang Jing
- Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University), Ministry of Education, School of Chemistry and Materials Science, International Joint Research Center for Catalytic Technology, Harbin 150080, PR China.
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17
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Abdullah H, Gultom NS, Kuo DH, Saragih AD. Cobalt-doped Zn(O,S)/Ga2O3 nanoheterojunction composites for enhanced hydrogen production. NEW J CHEM 2018. [DOI: 10.1039/c7nj05124g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cobalt-doped Zn(O,S)/Ga2O3 nanoheterojunction composites with different Co contents were synthesized and characterized.
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Affiliation(s)
- Hairus Abdullah
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
- Department of Industrial Engineering
| | - Noto Susanto Gultom
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
| | - Albert Daniel Saragih
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
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