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Severa K, Buravets V, Burtsev V, Zabelina A, Hrbek T, Kolska Z, Fitl P, Svorcik V, Lyutakov O. Black Titanium Oxide/Activated TaS 2 Flakes Photoelectrode for Plasmon Assisted Hydrogen Evolution at Neutral pH at High Current Density. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402758. [PMID: 38860555 DOI: 10.1002/smll.202402758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 06/02/2024] [Indexed: 06/12/2024]
Abstract
A heterojunction photo-electrode(s) consisting of porous black titanium oxide (bTiO2) and electrochemically self-activated TaS2 flakes is proposed and utilized for hydrogen evolution reaction (HER). The self-activated TaS2 flakes provide abundant catalytic sites for HER and the porous bTiO2, prepared by electrochemical anodization and subsequent reduction serves as an efficient light absorber, providing electrons for HER. Additionally, Au nanostructures are introduced between bTiO2 and TaS2 to facilitate the charge transfer and plasmon-triggering ability of the structure created. After structure optimization, high HER catalytic activity at acidic pH and excellent HER activity at neutral pH are achieved at high current densities. In particular, with the utilization of bTiO2@TaS2 photoelectrode (neutral electrolyte, sunlight illumination) current densities of 250 and 500 mA cm-2 are achieved at overpotentials of 433, and 689 mV, respectively, both exceeding the "benchmark" Pt. The addition of gold nanostructures further reduces the overpotential to 360 and 543 mV at 250 and 500 mA cm-2, respectively. The stability of the prepared electrodes is investigated and found to be satisfying within 24 h of performance at high current densities. The proposed system offers an excellent potential alternative to Pt for the development of green hydrogen production on an industrial scale.
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Affiliation(s)
- Kamil Severa
- Department of Solid State Engineering, University of Chemistry and Technology, Technicka 5, Prague, 166 28, Czech Republic
| | - Vladislav Buravets
- Department of Solid State Engineering, University of Chemistry and Technology, Technicka 5, Prague, 166 28, Czech Republic
| | - Vasilii Burtsev
- Department of Solid State Engineering, University of Chemistry and Technology, Technicka 5, Prague, 166 28, Czech Republic
| | - Anna Zabelina
- Department of Solid State Engineering, University of Chemistry and Technology, Technicka 5, Prague, 166 28, Czech Republic
| | - Tomas Hrbek
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, Prague 8, 180 00, Czech Republic
| | - Zdenka Kolska
- Faculty of Science, J. E. Purkyne University in Usti nad Labem, Ceske Mladeze 8, Usti nad Labem, 400 96, Czech Republic
| | - Premysl Fitl
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, 16628, Czech Republic
| | - Vaclav Svorcik
- Department of Solid State Engineering, University of Chemistry and Technology, Technicka 5, Prague, 166 28, Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid State Engineering, University of Chemistry and Technology, Technicka 5, Prague, 166 28, Czech Republic
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2
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Song X, Meng Y, Zhou X, Cheng K, Liang Y, Yang Z. Red mud accommodated mesoporous black TiO 2 framework with enhanced organic pollutant photodegradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:8689-8702. [PMID: 38180661 DOI: 10.1007/s11356-023-31666-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/18/2023] [Indexed: 01/06/2024]
Abstract
In this work, black TiO2 (BTiO2) loaded on black red mud (BRM) was successfully prepared with the conversion of Fe2O3 into magnetic Fe3O4 in red mud and the reduction of partial Ti4+ to Ti3+ in TiO2 via the facile sol-gel method and H2 reduction treatment. The obtained low-cost BRM/BTiO2 composites exhibit remarkable photocatalytic degradation toward rhodamine B (91.2%) and tetracycline (83.6%) under visible light irradiation, much better than pristine TiO2. This enhancement is attributed to the narrow bandgap with the desired solar-light excitation, the black color with good solar-light absorption, and the heterojunctions with the efficient separation of photogenerated electron-hole pairs. Moreover, the desired magnetic separation of BRM/BTiO2 composites realizes the recycle and recovery of photocatalysts, favoring practical applications in environment. This work provides a cost-efficiency way to prepare RM-supported TiO2 composites for treating organic pollutants in the wastewater, which is of great significance to the comprehensive utilization of RM waste, the cost saving of the photocatalyst, and the visible-light active enhancement of TiO2.
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Affiliation(s)
- Xiaojie Song
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Ying Meng
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Xin Zhou
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Kang Cheng
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Yu Liang
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Zhihong Yang
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China.
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3
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Shen J, Liu J, Fan X, Liu H, Bao Y, Hui A, Munir HA. Unveiling the antibacterial strategies and mechanisms of MoS 2: a comprehensive analysis and future directions. Biomater Sci 2024; 12:596-620. [PMID: 38054499 DOI: 10.1039/d3bm01030a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Antibiotic resistance is a growing problem that requires alternative antibacterial agents. MoS2, a two-dimensional transition metal sulfide, has gained significant attention in recent years due to its exceptional photocatalytic performance, excellent infrared photothermal effect, and impressive antibacterial properties. This review presents a detailed analysis of the antibacterial strategies and mechanism of MoS2, starting with its morphology and synthesis methods and focusing on the different interaction stages between MoS2 and bacteria. The paper summarizes the main antibacterial mechanisms of MoS2, such as photocatalytic antibacterial, enzyme-like catalytic antibacterial, physical antibacterial, and photothermal-assisted antibacterial. It offers a comprehensive discussion focus on recent research studies of photocatalytic antibacterial mechanisms and categorizes them, guiding the application of MoS2 in the antibacterial field. Overall, the review provides an in-depth understanding of the antibacterial mechanisms of MoS2 and presents the challenges and future directions for the improvement of MoS2 in the field of high-efficiency antibacterial materials.
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Affiliation(s)
- Jiahao Shen
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an, 710021, PR China.
| | - Junli Liu
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an, 710021, PR China.
| | - Xiuyi Fan
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an, 710021, PR China.
| | - Hui Liu
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an, 710021, PR China.
| | - Yan Bao
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China
| | - AiPing Hui
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China
| | - Hafiz Akif Munir
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an, 710021, PR China.
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4
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Zhao Y, Shu Y, Linghu X, Liu W, Di M, Zhang C, Shan D, Yi R, Wang B. Modification engineering of TiO 2-based nanoheterojunction photocatalysts. CHEMOSPHERE 2024; 346:140595. [PMID: 37951392 DOI: 10.1016/j.chemosphere.2023.140595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 09/27/2023] [Accepted: 10/29/2023] [Indexed: 11/14/2023]
Abstract
Titanium dioxide (TiO2)-based photocatalysts have gained increasing attention for their versatile applications in organic degradation, hydrogen production, air purification, and CO2 reduction. Various TiO2-based heterojunction structures, including type I, type II, Schottky junction, Z-scheme, and S-scheme, have been extensively studied. The current research frontier is centered on the engineering modifications of TiO2-based nanoheterojunction photocatalysts, such as defect engineering, morphological engineering, crystal phase/facet engineering, and multijunction engineering. These modifications enhance carrier transport, separation, and light absorption, thereby improving the photocatalytic performance. Remarkably, this aspect has been less addressed in existing reviews. This review aims to fill this gap by focusing on the engineering modifications of TiO2-based nanoheterojunction photocatalysts. We delve into specific topics like oxygen vacancies, n-p homojunctions, and double defects. The review also systematically discusses the applications of multidimensional heterojunctions and examines carrier transport pathways in heterophase/facet junctions and their interactions with heterojunctions. A comprehensive summary of multijunction systems, including multi-Schottky junctions, semiconductor-based heterojunction-attached Schottky junctions, and multisemiconductor-based heterojunctions, is presented. Lastly, we outline future perspectives in this promising research field. This paper will assist researchers in constructing more efficient TiO2-based nanoheterojunction photocatalysts.
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Affiliation(s)
- Yue Zhao
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Yue Shu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Xiaoyu Linghu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Wenqi Liu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Mengyu Di
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Changyuan Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Dan Shan
- Department of Medical, Tianjin Stomatological Hospital, School of Medicine, Nankai University, Tianjin, 300041, China
| | - Ran Yi
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Baiqi Wang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China; National Demonstration Center for Experimental Preventive Medicine Education (Tianjin Medical University), Tianjin, 300070, China.
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5
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Banoth P, Kandula C, Lavudya PK, Akaram S, De Los Santos Valladares L, Ammanabrolu R, Mamidipudi GK, Kollu P. BiFeO 3-Black TiO 2 Composite as a Visible Light Active Photocatalyst for the Degradation of Methylene Blue. ACS OMEGA 2023; 8:18653-18662. [PMID: 37273593 PMCID: PMC10233835 DOI: 10.1021/acsomega.3c00553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 04/28/2023] [Indexed: 06/06/2023]
Abstract
The application of a novel BiFeO3 (BFO)-black TiO2 (BTO) composite (called BFOT) as a photocatalyst for the degradation of methylene blue is reported. The p-n heterojunction photocatalyst was synthesized for the first time through microwave-assisted co-precipitation synthesis to change the molar ratio of BTO in BiFeO3 to increase the photocatalytic efficiency of the BiFeO3 photocatalyst. The UV-visible properties of p-n heterostructures showed excellent absorption of visible light and reduced electron-hole recombination properties compared to the pure-phase BFO. Photocatalytic studies on BFOT10, BFOT20, and BFOT30 have shown that they decompose methylene blue (MB) in sunlight better than pure-phase BFO in 70 min. The BFOT30 photocatalyst was the most effective at reducing MB when exposed to visible light (97%). Magnetic studies have shown that BTO is diamagnetic, and the BFOT10 photocatalyst exhibits a very weak antiferromagnetic behavior, whereas BFOT20 and BFO30 show diamagnetic behavior. This study confirms that the catalyst has poor stability and weak magnetic recovery properties due to the non-magnetic phase BTO in the BFO.
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Affiliation(s)
- Pravallika Banoth
- School
of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
| | - Chinna Kandula
- School
of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
| | - Praveen Kumar Lavudya
- School
of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
| | - Saidulu Akaram
- CASEST,
School of Physics, University of Hyderabad, Prof C R Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
| | - Luis De Los Santos Valladares
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.
- Laboratorio
de Cerámicos y Nanomateriales, Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Lima 14-0149, Peru
| | - RajaniKanth Ammanabrolu
- School
of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
| | - Ghanashyam Krishna Mamidipudi
- School
of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
- CASEST,
School of Physics, University of Hyderabad, Prof C R Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
| | - Pratap Kollu
- School
of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
- CASEST,
School of Physics, University of Hyderabad, Prof C R Rao Road, Gachibowli, Hyderabad, Telangana 500046, India
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6
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Liao L, Wang M, Li Z, Wang X, Zhou W. Recent Advances in Black TiO 2 Nanomaterials for Solar Energy Conversion. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:468. [PMID: 36770430 PMCID: PMC9921477 DOI: 10.3390/nano13030468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/16/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Titanium dioxide (TiO2) nanomaterials have been widely used in photocatalytic energy conversion and environmental remediation due to their advantages of low cost, chemical stability, and relatively high photo-activity. However, applications of TiO2 have been restricted in the ultraviolet range because of the wide band gap. Broadening the light absorption of TiO2 nanomaterials is an efficient way to improve the photocatalytic activity. Thus, black TiO2 with extended light response range in the visible light and even near infrared light has been extensively exploited as efficient photocatalysts in the last decade. This review represents an attempt to conclude the recent developments in black TiO2 nanomaterials synthesized by modified treatment, which presented different structure, morphological features, reduced band gap, and enhanced solar energy harvesting efficiency. Special emphasis has been given to the newly developed synthetic methods, porous black TiO2, and the approaches for further improving the photocatalytic activity of black TiO2. Various black TiO2, doped black TiO2, metal-loaded black TiO2 and black TiO2 heterojunction photocatalysts, and their photocatalytic applications and mechanisms in the field of energy and environment are summarized in this review, to provide useful insights and new ideas in the related field.
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7
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Park YH, Kim D, Hiragond CB, Lee J, Jung JW, Cho CH, In I, In SI. Phase-controlled 1T/2H-MoS2 interaction with reduced TiO2 for highly stable photocatalytic CO2 reduction into CO. J CO2 UTIL 2023. [DOI: 10.1016/j.jcou.2022.102324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Wolde GS, Kuo DH, Abdullah H. Solar-light-driven ternary MgO/TiO 2/g-C 3N 4 heterojunction photocatalyst with surface defects for dinitrobenzene pollutant reduction. CHEMOSPHERE 2022; 307:135939. [PMID: 35940421 DOI: 10.1016/j.chemosphere.2022.135939] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/26/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
Defect engineering and heterojunction are promising strategies to improve the photocatalytic performance of particular catalyst through effective charge carrier separation and transport. Herein, we developed Z-scheme MgO/TiO2/g-C3N4 ternary heterojunction photocatalyst with surface defects and effective charge separation for reduction of recalcitrant dinitrobenzene isomers under simulated solar light irradiation. Mott-Schottky (MS) plot analysis and electron spin resonance (ESR) radical trapping experiment suggested the formation of Z-scheme heterojunction at the interface of TiO2/g-C3N4, which played a crucial role in the electron-hole separation. Incorporating MgO into the structure further enhances charge separation via Ti3+ and oxygen vacancy (OV) defects formation at the TiO2/MgO interface as confirmed by electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS) analyses. Besides, the surface basicity of MgO enhanced conversion of dinitrobenzene (DNB) isomers through formation of nitrophenylhydroxylamine intermediate which can easily be reduced to phenylenediamines (PDAs). As confirmed by high performance liquid chromatography (HPLC) analysis, excellent selectivity for PDAs (95-98%) was achieved in 90 min with ternary MgO/TiO2/g-C3N4 composite compared to the binary MgO/TiO2 and TiO2/g-C3N4. A possible reaction pathway and photocatalytic reduction mechanism were proposed and elucidated. This work demonstrated an effective strategy to reduce recalcitrant dinitrobenzene isomers using efficient, low-cost, and environmental benign photocatalyst with a facile identification of reaction intermediates.
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Affiliation(s)
- Girma Sisay Wolde
- 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.
| | - Hairus Abdullah
- 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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Guo D, Wan Z, Fang G, Zhu M, Xi B. A Tandem Interfaced (Ni 3 S 2 -MoS 2 )@TiO 2 Composite Fabricated by Atomic Layer Deposition as Efficient HER Electrocatalyst. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201896. [PMID: 35560706 DOI: 10.1002/smll.202201896] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Reported herein is a highly active and durable hydrogen evolution reaction (HER) electrocatalyst, which is constructed following a tandem interface strategy and functional in alkaline and even neutral medium (pH ≈ 7). The ternary composite material, consisting of conductive nickel foam (NF) substrate, Ni3 S2 -MoS2 heterostructure, and TiO2 coating, is synthesized by the hydrothermal method and atomic layer deposition (ALD) technique. Representative results include: (1) versatile characterizations confirm the proposed composite structure and strong electronic interactions among comprised sulfide and oxide species; (2) the material outperforms commercial Pt/C by recording an overpotential of 115 mV and a Tafel slope of 67 mV dec-1 under neutral conditions. A long-term stability in alkaline electrolytes up to 200 h and impressive overall water splitting behavior (1.56 V @ 10 mA cm-2 ) are documented; (3) implementation of ALD oxide tandem layer is crucial to realize the design concept with superior HER performance by modulating a variety of heterointerface and intermediates electronic structure.
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Affiliation(s)
- Daying Guo
- School of Materials Science and Engineering, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, PFCM Lab, Sun Yat-sen University, Guangzhou, 510275, China
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Zhixin Wan
- School of Materials Science and Engineering, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, PFCM Lab, Sun Yat-sen University, Guangzhou, 510275, China
| | - Guoyong Fang
- Key Laboratory of Carbon Materials of Zhejiang Province, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Mengqi Zhu
- School of Materials Science and Engineering, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, PFCM Lab, Sun Yat-sen University, Guangzhou, 510275, China
| | - Bin Xi
- School of Materials Science and Engineering, Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices, PFCM Lab, Sun Yat-sen University, Guangzhou, 510275, China
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Li B, He Y, Xiao M, Zhang Y, Wang Z, Qin Z, Chai B, Yan J, Li J, Li J, Cao Z. A solar-light driven photocatalytic fuel cell for efficient electricity generation and organic wastewater degradation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128205] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Tang Z, Xu L, Shu K, Yang J, Tang H. Fabrication of TiO2 @MoS2 heterostructures with improved visible light photocatalytic activity. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128686] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Favre R, Raybaud P, Le Bahers T. Electronic structures of the MoS 2/TiO 2 (anatase) heterojunction: influence of physical and chemical modifications at the 2D- or 1D-interfaces. Phys Chem Chem Phys 2022; 24:2646-2655. [PMID: 35029604 DOI: 10.1039/d1cp05151b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
To tackle the challenge of CO2 photoreduction, semiconducting layered transition metal dichalcogenides like MoS2 have attracted much attention due to their tunable 2D nano-structures. By using advanced periodic density functional theory calculations (HSE06 functional), we provide a systematic quantification of the optoelectronic properties of various interfacial heterostructures composed of 2H-MoS2 and anatase TiO2. We systematically determine the band gaps, and conduction band (CB) and valence band (VB) positions to figure out the nature of the heterojunction. Two main surface orientations of anatase TiO2 particles, (101) and (001), are considered with 2D-MoS2 nanosheets or nanoribbons forming either a 2D physical (van der Waals) or through a 1D chemical interface. The possibility to chemically modify the MoS2/TiO2 interface, either by sulfidation or hydration, and its effect on the electronic structure are deeply investigated. These modifications in the heterostructure lead to important changes in the electronic properties and charge transfer between the two materials which impact both photon absorption properties and charge carrier dynamics suspected to influence in turn the photocatalytic activity. While a type I hetrojunction is found for the 1D chemical interface, a type II heterojunction with appropriate CB/VB positions for CO2 reduction and H2O oxidation is identified for the 2D physical interface which could lead to the targeted Z-scheme mechanism with strong potential interest in photocatalysis applications.
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Affiliation(s)
- Rémi Favre
- Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, France.
| | - Pascal Raybaud
- Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, France. .,IFP Energies Nouvelles, Rond-point de l'échangeur de Solaize, BP 3, 69360 Solaize, France
| | - Tangui Le Bahers
- Univ Lyon, ENS de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie UMR 5182, F-69342, France.
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13
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Hunge YM, Yadav AA, Kang SW, Kim H. Photocatalytic degradation of tetracycline antibiotics using hydrothermally synthesized two-dimensional molybdenum disulfide/titanium dioxide composites. J Colloid Interface Sci 2022; 606:454-463. [PMID: 34399362 DOI: 10.1016/j.jcis.2021.07.151] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 01/18/2023]
Abstract
Tetracycline (TC) is a persistent antibiotic used in many countries, including China, India, and the United States of America (USA), because of its low price and effectiveness in enhancing livestock production. However, such antibiotics can have toxic effects on living organisms via complexation with metals, and their accumulation leading to teratogenicity and carcinogenicity. In this study, two-dimensional molybdenum disulfide/titanium dioxide (MoS2/TiO2) composites with different amounts of molybdenum disulfide (MoS2) were prepared via a simple, cost-effective, and pollution-free hydrothermal route. The synthesized MoS2/TiO2 microstructures were thoroughly characterized and their performance for the photocatalytic degradation of antibiotics such as TC was investigated. In the degradation experiments, the photocatalytic activities of TiO2 and the MoS2/TiO2 composites were compared, and the effects of different parameters, such as catalyst dose and electrolyte solution pH, were investigated. Under irradiation, the MoS2/TiO2 composites possessed superior photodegradation activity toward TC because of their excellent adsorption abilities, suitable band positions, and large surface areas as well as the effective charge-transfer ability of MoS2. Kinetics studies revealed that the photocatalytic degradation process followed pseudo-first-order reaction kinetics. In addition, a degradation mechanism for TC was proposed.
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Affiliation(s)
- Y M Hunge
- Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - A A Yadav
- Department of Automotive Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Seok-Won Kang
- Department of Automotive Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Hyunmin Kim
- Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea; Department of Interdisciplinary Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea.
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14
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Cheng P, Ye LL, Wu SC, Chen Y, Yan X, Guo XJ, Lang WZ. Amorphous TiO 2 Bridges Stabilized WS 2 Membranes with Excellent Filtration Stability and Photocatalysis-Driving Self-Cleaning Ability. ACS APPLIED MATERIALS & INTERFACES 2021; 13:58076-58084. [PMID: 34816708 DOI: 10.1021/acsami.1c14967] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) membranes as a new type of water filtration membrane have shown great potential in water separation and purification. However, their long-term stability under cross-flow conditions and their antifouling property are two main concerns for practical separation and purification processes. In this work, a strategy of nanoparticle bridges based on amorphous TiO2 is developed to link adjacent WS2 nanosheets on a WS2 membrane surface, leading to a strong membrane surface with excellent stability during 204 h of continuous cross-flow filtration. Moreover, the amorphous TiO2 bridges also form a TiO2/WS2 heterojunction on the WS2 membrane surface, exhibiting an impressive photocatalysis-driving self-cleaning property by pollutant photodegradation. And the flux recovery ratio (FRR) exceeds 95% after three cycles of separation experiments. The excellent long-term stability and photocatalysis-driving self-cleaning property of the WS2/TiO2 membrane provide a new approach to construct robust 2D membranes.
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Affiliation(s)
- Peng Cheng
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Lin-Lin Ye
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Shao-Chun Wu
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Yan Chen
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Xi Yan
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Xiao-Jing Guo
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Wan-Zhong Lang
- The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China
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15
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Matveev AT, Konopatsky AS, Leybo DV, Volkov IN, Kovalskii AM, Varlamova LA, Sorokin PB, Fang X, Kulinich SA, Shtansky DV. Amorphous MoS xO y/ h-BN xO y Nanohybrids: Synthesis and Dye Photodegradation. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3232. [PMID: 34947581 PMCID: PMC8703645 DOI: 10.3390/nano11123232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022]
Abstract
Molybdenum sulfide is a very promising catalyst for the photodegradation of organic pollutants in water. Its photocatalytic activity arises from unsaturated sulfur bonds, and it increases with the introduction of structural defects and/or oxygen substitutions. Amorphous molybdenum sulfide (a-MoSxOy) with oxygen substitutions has many active sites, which create favorable conditions for enhanced catalytic activity. Here we present a new approach to the synthesis of a-MoSxOy and demonstrate its high activity in the photodegradation of the dye methylene blue (MB). The MoSxOy was deposited on hexagonal boron oxynitride (h-BNO) nanoflakes by reacting h-BNO, MoCl5, and H2S in dimethylformamide (DMF) at 250 °C. Both X-ray diffraction analysis and high-resolution TEM show the absence of crystalline order in a-MoSxOy. Based on the results of Raman and X-ray photoelectron spectroscopy, as well as analysis by the density functional theory (DFT) method, a chain structure of a-MoSxOy was proposed, consisting of MoS3 clusters with partial substitution of sulfur by oxygen. When a third of the sulfur atoms are replaced with oxygen, the band gap of a-MoSxOy is approximately 1.36 eV, and the valence and conduction bands are 0.74 eV and -0.62 eV, respectively (relative to a standard hydrogen electrode), which satisfies the conditions of photoinduced splitting of water. When illuminated with a mercury lamp, a-MoSxOy/h-BNxOy nanohybrids have a specific mass activity in MB photodegradation of approximately 5.51 mmol g-1 h-1, which is at least four times higher than so far reported values for nonmetal catalysts. The photocatalyst has been shown to be very stable and can be reused.
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Affiliation(s)
- Andrei T. Matveev
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Anton S. Konopatsky
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Denis V. Leybo
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Ilia N. Volkov
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Andrey M. Kovalskii
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Liubov A. Varlamova
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Pavel B. Sorokin
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
| | - Xiaosheng Fang
- Department of Materials Science, Fudan University, Shanghai 200433, China;
| | - Sergei A. Kulinich
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Kanagawa, Japan
- School of Engineering, Far Eastern Federal University, 690041 Vladivostok, Russia
| | - Dmitry V. Shtansky
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISIS”, Leninskiy Prospect 4, 119049 Moscow, Russia; (A.S.K.); (D.V.L.); (I.N.V.); (A.M.K.); (L.A.V.); (P.B.S.); (D.V.S.)
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16
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Lu K, Hou F, Fu W, Xue F, Liu M. Efficient solar photocatalytic hydrogen production using direct Z-scheme heterojunctions. Phys Chem Chem Phys 2021; 23:22743-22749. [PMID: 34608466 DOI: 10.1039/d1cp02356j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We report the preparation of a series of heterojunctions made of Ta3N5 and TiO2 nanoparticles that show good properties for photocatalytic hydrogen production. The composite photocatalyst with a light-response range up to 620 nm shows a hydrogen evolution rate of 250 μmol h-1. The apparent quantum efficiency at 330 nm can be as high as 46%. Particularly, normalized spectral studies indicate that the heterojunction is more active upon full-spectrum (without using optical filters) irradiation, and its activity is even superior to the total activity exhibited upon UV-light irradiation (λ ≤ 420 nm) and visible-infrared light irradiation (λ ≥ 420 nm). Moreover, in situ photodeposition of platinum nanoparticles on the surface of the photocatalyst as well as the band alignment analysis demonstrate the Z-scheme mechanism associated with the photocatalytic process. Specifically, photogenerated electrons from TiO2 will rapidly combine with the photogenerated holes from Ta3N5 through interfacial charge transfer, leaving the more active electrons and holes in Ta3N5 and TiO2, respectively, to facilitate redox reactions. Basically, TiO2 is only UV-light active, while Ta3N5 can be activated under visible-light irradiation. In this case, a synergy effect, upon simultaneous UV-light excitation and visible-light excitation, can be achieved by full-spectrum irradiation, leading to a much higher photocatalytic activity. This work thus provides a favorable and upward direction for the establishment of heterojunctions for high-efficiency hydrogen production and solar energy applications.
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Affiliation(s)
- Kejian Lu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Fangyong Hou
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Wenlong Fu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Fei Xue
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Maochang Liu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China. .,Suzhou Academy of Xi'an Jiaotong University, Suzhou, Jiangsu 215123, P. R. China
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17
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In-Situ Photodeposition of Highly Dispersed MoSx as a Co-catalyst on TiO2 Nanoparticles for Efficient and Stable Photocatalytic H2 Evolution. Catal Letters 2021. [DOI: 10.1007/s10562-021-03807-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Zhang Y, Liu X, Yusoff M, Razali MH. Photocatalytic and Antibacterial Properties of a 3D Flower-Like TiO 2 Nanostructure Photocatalyst. SCANNING 2021; 2021:3839235. [PMID: 34630820 PMCID: PMC8492283 DOI: 10.1155/2021/3839235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Flower-like titanium dioxide (TiO2) nanostructures are successfully synthesized using a hybrid sol-gel and a simple hydrothermal method. The sample was characterized using various techniques to study their physicochemical properties and was tested as a photocatalyst for methyl orange degradation and as an antibacterial material. Raman spectrum and X-ray diffraction (XRD) pattern show that the phase structure of the synthesized TiO2 is anatase with 80-100 nm in diameter and 150-200 nm in length of flower-like nanostructures as proved by field emission scanning electron microscope (FESEM). The energy-dispersive X-ray spectroscopy (EDS) analysis of flower-like anatase TiO2 nanostructure found that only titanium and oxygen elements are present in the sample. The anatase phase was confirmed further by a high-resolution transmission electron microscope (HRTEM) and selected area electron diffraction (SAED) pattern analysis. The Brunauer-Emmett-Teller (BET) result shows that the sample had a large surface area (108.24 m2/g) and large band gap energy (3.26 eV) due to their nanosize. X-ray photoelectron spectroscopy (XPS) analysis revealed the formation of Ti4+ and Ti3+ species which could prevent the recombination of the photogenerated electron, thus increased the electron transportation and photocatalytic activity of flower-like anatase TiO2 nanostructure to degrade the methyl orange (83.03%) in a short time (60 minutes). These properties also support the good performance of flower-like titanium dioxide (TiO2) nanostructure as an antibacterial material which is comparable with penicillin which is 13.00 ± 0.02 mm inhibition zone against Staphylococcus aureus.
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Affiliation(s)
- Yunping Zhang
- Department of Central Sterile Supply, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Xi Liu
- Department of Nursing, The Third Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - Mahani Yusoff
- Faculty of Bioengineering and Technology, Universiti Malaysia Kelantan, 17600 Jeli, Kelantan, Malaysia
| | - Mohd Hasmizam Razali
- Advanced Nanomaterials Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
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19
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Nguyen VQ, Mady AH, Mahadadalkar MA, Baynosa ML, Kumar DR, Rabie AM, Lee J, Kim WK, Shim JJ. Highly active Z-scheme heterojunction photocatalyst of anatase TiO 2 octahedra covered with C-MoS 2 nanosheets for efficient degradation of organic pollutants under solar light. J Colloid Interface Sci 2021; 606:337-352. [PMID: 34392030 DOI: 10.1016/j.jcis.2021.07.128] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/21/2021] [Accepted: 07/25/2021] [Indexed: 12/19/2022]
Abstract
The construction of a Z-scheme photocatalyst by coupling semiconductors with conductors is an efficient way to achieve high pollutant degradation efficiency. In this study, a hydrothermal approach was used to fabricate a Z-scheme photocatalyst consisting of C-MoS2 sheets wrapped around octahedral anatase TiO2 nanocrystals. The catalyst showed excellent photocatalytic efficiency (99%) for methylene blue degradation with low catalyst loading (0.2 g L-1) under the simulated solar light within 60 min. High photocatalytic degradation efficiencies were also observed for Rhodamine B, methyl orange, and tetracycline under solar irradiation. The C-MoS2 acts as an electron mediator and serves as a carrier transmission bridge for the efficient electron-hole separation. The electron-rich (101)-faceted TiO2 benefits the Z-scheme recombination of electrons from the conduction band of TiO2 and holes at the valence band of MoS2. The semiconductor coupling of (101)-exposed octahedral TiO2 and 2H-MoS2 as well as the introduction of solid-state electron mediators, 1T-MoS2 and carbon, resulted in increased light absorption and accelerated charge transfer at the contact interface, which enhanced the photocatalytic activity of the photocatalyst significantly compared to those of P25, MoS2/TiO2, and C-MoS2. The efficient separation of electron-hole pairs prolongs their lifetime for oxidation and reduction reactions in the degradation process.
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Affiliation(s)
- Van Quang Nguyen
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Faculty of Road and Bridge Engineering, The University of Da Nang-University of Science and Technology, 54 Nguyen Luong Bang, Da Nang 550000, Viet Nam
| | - Amr Hussein Mady
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Petrochemical Department, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt
| | - Manjiri A Mahadadalkar
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Marjorie Lara Baynosa
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Department of Chemical Engineering, University of the Philippines-Diliman, Diliman, Quezon City 1101, Philippines
| | - Deivasigamani Ranjith Kumar
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Abdelrahman M Rabie
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea; Petrochemical Department, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Woo Kyoung Kim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Jae-Jin Shim
- School of Chemical Engineering, Yeungnam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
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20
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Kite S, Kadam AN, Sathe DJ, Patil S, Mali SS, Hong CK, Lee S, Garadkar KM. Nanostructured TiO 2 Sensitized with MoS 2 Nanoflowers for Enhanced Photodegradation Efficiency toward Methyl Orange. ACS OMEGA 2021; 6:17071-17085. [PMID: 34250364 PMCID: PMC8264933 DOI: 10.1021/acsomega.1c02194] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/15/2021] [Indexed: 05/27/2023]
Abstract
Nanostructured titanium dioxide (TiO2) has a potential platform for the removal of organic contaminants, but it has some limitations. To overcome these limitations, we devised a promising strategy in the present work, the heterostructures of TiO2 sensitized by molybdenum disulfide (MoS2) nanoflowers synthesized by the mechanochemical route and utilized as an efficient photocatalyst for methyl orange (MO) degradation. The surface of TiO2 sensitized by MoS2 was comprehensively characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform-infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence spectroscopy (PL), Brunauer-Emmett-Teller (BET) surface area, and thermogravimetric analysis (TGA). From XRD results, the optimized MoS2-TiO2 (5.0 wt %) nanocomposite showcases the lowest crystallite size of 14.79 nm than pristine TiO2 (20 nm). The FT-IR and XPS analyses of the MoS2-TiO2 nanocomposite exhibit the strong interaction between MoS2 and TiO2. The photocatalytic results show that sensitization of TiO2 by MoS2 drastically enhanced the photocatalytic activity of pristine TiO2. According to the obtained results, the optimal amount of MoS2 loading was assumed to be 5.0 wt %, which exhibited a 21% increment of MO photodegradation efficiency compared to pristine TiO2 under UV-vis light. The outline of the overall study describes the superior photocatalytic performance of 5.0 wt % MoS2-TiO2 nanocomposite which is ascribed to the delayed recombination by efficient charge transfer, high surface area, and elevated surface oxygen vacancies. The context of the obtained results designates that the sensitization of TiO2 with MoS2 is a very efficient nanomaterial for photocatalytic applications.
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Affiliation(s)
- Sagar
V. Kite
- Nanomaterials
Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India
| | - Abhijit Nanaso Kadam
- Department
of Chemical and Biological Engineering, Gachon University, Seongnamdaero, Seongnam-si 1342, Republic
of Korea
| | - Dattatraya J. Sathe
- Department
of Chemistry, KIT’s College of Engineering
(Autonomous), Kolhapur, Maharashtra 416234, India
| | - Satish Patil
- Nanomaterials
Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India
| | - Sawanta S. Mali
- Polymer
Energy Materials Laboratory, School of Advanced Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Chang Kook Hong
- Polymer
Energy Materials Laboratory, School of Advanced Chemical Engineering, Chonnam National University, Gwangju 61186, South Korea
| | - Sang−Wha Lee
- Department
of Chemical and Biological Engineering, Gachon University, Seongnamdaero, Seongnam-si 1342, Republic
of Korea
| | - Kalyanrao M. Garadkar
- Nanomaterials
Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra 416004, India
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21
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Monga D, Basu S. Tuning the photocatalytic/electrocatalytic properties of MoS 2/MoSe 2 heterostructures by varying the weight ratios for enhanced wastewater treatment and hydrogen production. RSC Adv 2021; 11:22585-22597. [PMID: 35480422 PMCID: PMC9034378 DOI: 10.1039/d1ra01760h] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/19/2021] [Indexed: 11/25/2022] Open
Abstract
Two-dimensional (2D) heterojunctions with layered structures give high flexibility in varying their photocatalytic/electrocatalytic properties. Herein, 2D/2D heterostructures of MoS2/MoSe2 with different weight-ratios (1 : 1, 1 : 3, and 3 : 1) have been prepared by a simple one-step microwave-assisted technique. The characterization studies confirm formation of crystalline MoS2/MoSe2 nanoparticles with a high surface area (60 m2 g−1) and porous structure. The high synergistic-effect (1.73) and narrow bandgap (∼1.89 eV) of the composites result in enhanced photo-degradation efficiency towards methylene blue dye (94%) and fipronil pesticide (80%) with high rate constants (0.33 min−1 and 0.016 min−1 respectively) under visible light. The effect of pH, catalyst dose, and illumination area on photodegradation has been optimized. Photodegradation of real-industrial wastewater shows 65% COD and 51.5% TOC removal. Trapping experiments confirm that holes are mainly responsible for degradation. The composites were highly reusable showing 75% degradation after 5-cycles. MoS2/MoSe2 composites show excellent electrochemical water-splitting efficacy through hydrogen-evolution-reaction (HER) exhibiting a stable high current density of −19.4 mA cm−2 after 2500 cyclic-voltammetry (CV) cycles. The CV-plots reveal high capacitance activity (Cdl value ∼607 μF cm−2) with a great % capacitance retention (>90%). The as-prepared 2D/2D-catalysts are highly active in sunlight and beneficial for long-time physico-chemical wastewater treatment. Moreover, the electrochemical studies confirm that these composites are potential materials for HER activity and energy-storage applications. The 2D/2D-MoS2/MoSe2 catalysts with good photocatalytic/electrocatalytic properties can be potential materials for wastewater treatment and hydrogen production.![]()
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Affiliation(s)
- Divya Monga
- School of Chemistry and Biochemistry, Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology Patiala-147004 India
| | - Soumen Basu
- School of Chemistry and Biochemistry, Affiliate Faculty-TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology Patiala-147004 India
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22
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Yu C, Zhang Z, Dong Z, Xiong Y, Wang Y, Liu Y, Cao X, Dong W, Liu M, Liu Y. Fabrication of heterostructured CdS/TiO2 nanotube arrays composites for photoreduction of U(VI) under visible light. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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23
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Hydrothermal construction of flower-like MoS2 on TiO2 NTs for highly efficient environmental remediation and photocatalytic hydrogen evolution. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118463] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Li S, Sun J, Guan J. Strategies to improve electrocatalytic and photocatalytic performance of two-dimensional materials for hydrogen evolution reaction. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63693-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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25
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Mousavi M, Ghasemi JB. Novel visible-light-responsive Black-TiO2/CoTiO3 Z-scheme heterojunction photocatalyst with efficient photocatalytic performance for the degradation of different organic dyes and tetracycline. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.04.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Guo Z, Cui Z. Fluorescent nanotechnology for in vivo imaging. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 13:e1705. [PMID: 33686803 DOI: 10.1002/wnan.1705] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 11/21/2020] [Accepted: 01/12/2021] [Indexed: 12/11/2022]
Abstract
Fluorescent imaging in living animals gives an intuitive picture of the dynamic processes in the complex environment within a living being. However, animal tissues present a substantial barrier and are opaque to most wavelengths of visible light. Fluorescent nanoparticles (NPs) with new photophysical characteristics have shown excellent performance for in vivo imaging. Hence, fluorescent NPs have been widely studied and applied for the detection of molecular and biological processes in living animals. In addition, developments in the area of nanotechnology have allowed materials to be used in intact animals for disease detection, diagnosis, drug delivery, and treatment. This review provides information on the different types of fluorescent particles based on nanotechnology, describing their unique individual properties and applications for detecting vital processes in vivo. The development and application of new fluorescent NPs will provide opportunities for in vivo imaging with better penetration, sensitivity, and resolution. This article is categorized under: Diagnostic Tools > in vivo Nanodiagnostics and Imaging.
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Affiliation(s)
- Zhengyuan Guo
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zongqiang Cui
- State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
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Xue X, Chen H, Xiong Y, Chen R, Jiang M, Fu G, Xi Z, Zhang XL, Ma J, Fang W, Jin Z. Near-Infrared-Responsive Photo-Driven Nitrogen Fixation Enabled by Oxygen Vacancies and Sulfur Doping in Black TiO 2-xS y Nanoplatelets. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4975-4983. [PMID: 33464808 DOI: 10.1021/acsami.0c17947] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Solar-driven nitrogen fixation is a promising clean and mild approach for ammonia synthesis beyond the conventional energy-intensive Haber-Bosch process. However, it is still challenging to design highly active, stable, and low-cost photocatalysts for activating inert N2 molecules. Herein, we report the synthesis of anatase-phase black TiO2-xSy nanoplatelets enriched with abundant oxygen vacancies and sulfur anion dopants (VO-S-rich TiO2-xSy) by ion exchange method at gentle conditions. The VO-S-rich TiO2-xSy nanoplatelets display a narrowed bandgap of 1.18 eV and much stronger light absorption that extends to the near-infrared (NIR) region. The co-presence of oxygen vacancies and sulfur dopants facilitates the adsorption of N2 molecules, promoting the reaction rate of N2 photofixation. Theoretical calculations reveal the synergistic effect of oxygen vacancies and sulfur dopants on visible-NIR light adsorption and photoexcited carrier transfer/separation. The VO-S-rich TiO2-xSy exhibits improved ammonia yield rates of 114.1 μmol g-1 h-1 under full-spectrum irradiation and 86.2 μmol g-1 h-1 under visible-NIR irradiation, respectively. Notably, even under only NIR irradiation (800-1100 nm), the VO-S-rich TiO2-xSy can still deliver an ammonia yield rate of 14.1 μmol g-1 h-1. This study presents the great potential to regulate the activity of photocatalysts by rationally engineering the defect sites and dopant species for room-temperature N2 reduction.
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Affiliation(s)
- Xiaolan Xue
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hongwei Chen
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yan Xiong
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Renpeng Chen
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Minghang Jiang
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Gao Fu
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zhonghua Xi
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiao Li Zhang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jing Ma
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Weihai Fang
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Zhong Jin
- MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
- Shenzhen Research Institute of Nanjing University, Shenzhen 518057, China
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Mousavi M, Soleimani M, Hamzehloo M, Badiei A, Ghasemi JB. Photocatalytic degradation of different pollutants by the novel gCN-NS/Black-TiO2 heterojunction photocatalyst under visible light: Introducing a photodegradation model and optimization by response surface methodology (RSM). MATERIALS CHEMISTRY AND PHYSICS 2021; 258:123912. [DOI: 10.1016/j.matchemphys.2020.123912] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
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Guo L, Yu G, Zhao H, Xing C, Hu Y, Chen T, Li X. Construction of heterojunctions between ReS 2 and twin crystal Zn xCd 1−xS for boosting solar hydrogen evolution. NEW J CHEM 2021. [DOI: 10.1039/d0nj06264b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nanoflower-like ReS2 anchoring on nanotwins ZnxCd1−xS greatly boosts photocatalytic hydrogen evolution rate with 31-times higher than pure phase P-ZCS.
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Affiliation(s)
- Luyan Guo
- College of Science
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Guiyang Yu
- School of Materials Science and Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Haitao Zhao
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- Liaocheng University
- Liaocheng 252059
- China
| | - Chuanwang Xing
- College of Science
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Yujia Hu
- College of Science
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Ting Chen
- School of Materials Science and Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Xiyou Li
- School of Materials Science and Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
- Institute of New Energy
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30
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Monga D, Ilager D, Shetti NP, Basu S, Aminabhavi TM. 2D/2d heterojunction of MoS 2/g-C 3N 4 nanoflowers for enhanced visible-light-driven photocatalytic and electrochemical degradation of organic pollutants. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 274:111208. [PMID: 32814213 DOI: 10.1016/j.jenvman.2020.111208] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/04/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Photodegradation of toxic pollutants is a promising approach to deal with wastewater management. In this regard, MoS2/g-C3N4 (MSC) derived composites with varying weight-ratios were prepared via fast (30 min) one step microwave-assisted method. The materials were characterized by XRD, XPS, EDS, FESEM and HRTEM to validate their flower-like and sheet-like morphologies. The PL and UV-vis DRS spectra exhibited low recombination-rate and band-gap (1.7 eV), which is appropriate for an effective visible-light degradation. Photocatalytic performance of the catalysts was analyzed by investigating the degradation of methylene blue (MB) as well as pesticide fipronil. Best results were obtained by 5:1 MSC (98.7% degradation efficacy; rate constant 0.0261 min-1) in 80 min under the sunlight. The effects of solution pH, catalyst-dose, scavengers and illumination-area were also explored. The catalyst was reusable as confirmed by degradation studies (~82% efficiency) even after 5-cycles. The photocatalytic treatment of real industrial-wastewater was also conducted. The TOC and COD analysis validated that the treatment by as-prepared catalyst is more proficient for effluent-treatment than the industrial physico-chemical treatments. Electrochemical degradation of MB was also investigated using the glassy carbon electrode modified with different MSC-ratios. The electrode modified with 5:1 MSC at pH 7 manifested the maximum peak current. The plausible mechanisms for photocatalytic and electrochemical degradations were proposed, which suggested the remarkable potential the prepared nanocomposites for wastewater treatment.
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Affiliation(s)
- Divya Monga
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India
| | - Davalasab Ilager
- Center for Electrochemical Science & Materials, Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580027, Karnataka, India
| | - Nagaraj P Shetti
- Center for Electrochemical Science & Materials, Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580027, Karnataka, India
| | - Soumen Basu
- School of Chemistry and Biochemistry, TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India.
| | - Tejraj M Aminabhavi
- Department of Pharmaceutics, SET's College of Pharmacy, Dharwad, Karnataka, India.
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31
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Hasan J, Li H, Tian G, Qin C. Fabrication of Cr2S3-GO-TiO2 composite with high visible-light-driven photocatalytic activity on degradation of organic dyes. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110950] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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32
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Sarilmaz A, Genc E, Aslan E, Ozen A, Yanalak G, Ozel F, Patir IH. Photocatalytic hydrogen evolution via solar-driven Water splitting by CuSbS2 with different shapes. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112706] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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Guan G, Ye E, You M, Li Z. Hybridized 2D Nanomaterials Toward Highly Efficient Photocatalysis for Degrading Pollutants: Current Status and Future Perspectives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1907087. [PMID: 32301226 DOI: 10.1002/smll.201907087] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/29/2020] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
Organic pollutants including industrial dyes and chemicals and agricultural waste have become a major environmental issue in recent years. As an alternative to simple adsorption, photocatalytic decontamination is an efficient and energy-saving technology to eliminate these pollutants from water environment, utilizing the energy of external light, and unique function of photocatalysts. Having a large specific surface area, numerous active sites, and varied band structures, 2D nanosheets have exhibited promising applications as an efficient photocatalyst for degrading organic pollutants, particularly hybridization with other functional components. The novel hybridization of 2D nanomaterials with various functional species is summarized systematically with emphasis on their enhanced photocatalytic activities and outstanding performances in environmental remediation. First, the mechanism of photocatalytic degradation is given for discussing the advantages/shortcomings of regular 2D materials and identifying the importance of constructing hybrid 2D photocatalysts. An overview of several types of intensively investigated 2D nanomaterials (i.e., graphene, g-C3 N4 , MoS2 , WO3 , Bi2 O3 , and BiOX) is then given to indicate their hybridized methodologies, synergistic effect, and improved applications in decontamination of organic dyes and other pollutants. Finally, future research directions are rationally suggested based on the current challenges.
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Affiliation(s)
- Guijian Guan
- Institute of Molecular Plus, Tianjin University, Tianjin, 300072, P. R. China
| | - Enyi Ye
- Institute of Materials Research and Engineering, A*STAR, 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Mingliang You
- Hangzhou Cancer Institute, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou, 310002, P. R. China
| | - Zibiao Li
- Department of Clinical Pharmacy, Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, P. R. China
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34
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Abraham A, Wang L, Quilty CD, Lutz DM, McCarthy AH, Tang CR, Dunkin MR, Housel LM, Takeuchi ES, Marschilok AC, Takeuchi KJ. Defect Control in the Synthesis of 2 D MoS 2 Nanosheets: Polysulfide Trapping in Composite Sulfur Cathodes for Li-S Batteries. CHEMSUSCHEM 2020; 13:1517-1528. [PMID: 31705599 DOI: 10.1002/cssc.201903028] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Indexed: 06/10/2023]
Abstract
One of the inherent challenges with Li-S batteries is polysulfide dissolution, in which soluble polysulfide species can contribute to the active material loss from the cathode and undergo shuttling reactions inhibiting the ability to effectively charge the battery. Prior theoretical studies have proposed the possible benefit of defective 2 D MoS2 materials as polysulfide trapping agents. Herein the synthesis and thorough characterization of hydrothermally prepared MoS2 nanosheets that vary in layer number, morphology, lateral size, and defect content are reported. The materials were incorporated into composite sulfur-based cathodes and studied in Li-S batteries with environmentally benign ether-based electrolytes. Through directed synthesis of the MoS2 additive, the relationship between synthetically induced defects in 2 D MoS2 materials and resultant electrochemistry was elucidated and described.
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Affiliation(s)
- Alyson Abraham
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Lei Wang
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Calvin D Quilty
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Diana M Lutz
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Alison H McCarthy
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Christopher R Tang
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Mikaela R Dunkin
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Lisa M Housel
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Esther S Takeuchi
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Amy C Marschilok
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
- Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Kenneth J Takeuchi
- Department of Chemistry, Stony Brook University, Stony Brook, NY, 11794, USA
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY, 11794, USA
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35
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Zhang W, Tian Y, He H, Xu L, Li W, Zhao D. Recent advances in the synthesis of hierarchically mesoporous TiO2 materials for energy and environmental applications. Natl Sci Rev 2020; 7:1702-1725. [PMID: 34691503 PMCID: PMC8288798 DOI: 10.1093/nsr/nwaa021] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 01/13/2020] [Indexed: 01/26/2023] Open
Abstract
Because of their low cost, natural abundance, environmental benignity, plentiful polymorphs, good chemical stability and excellent optical properties, TiO2 materials are of great importance in the areas of physics, chemistry and material science. Much effort has been devoted to the synthesis of TiO2 nanomaterials for various applications. Among them, mesoporous TiO2 materials, especially with hierarchically porous structures, show great potential owing to their extraordinarily high surface areas, large pore volumes, tunable pore structures and morphologies, and nanoscale effects. This review aims to provide an overview of the synthesis and applications of hierarchically mesoporous TiO2 materials. In the first section, the general synthetic strategies for hierarchically mesoporous TiO2 materials are reviewed. After that, we summarize the architectures of hierarchically mesoporous TiO2 materials, including nanofibers, nanosheets, microparticles, films, spheres, core-shell and multi-level structures. At the same time, the corresponding mechanisms and the key factors for the controllable synthesis are highlighted. Following this, the applications of hierarchically mesoporous TiO2 materials in terms of energy storage and environmental protection, including photocatalytic degradation of pollutants, photocatalytic fuel generation, photoelectrochemical water splitting, catalyst support, lithium-ion batteries and sodium-ion batteries, are discussed. Finally, we outline the challenges and future directions of research and development in this area.
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Affiliation(s)
- Wei Zhang
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, and iChEM, Fudan University, Shanghai 200433, China
| | - Yong Tian
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, and iChEM, Fudan University, Shanghai 200433, China
| | - Haili He
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, and iChEM, Fudan University, Shanghai 200433, China
| | - Li Xu
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, and iChEM, Fudan University, Shanghai 200433, China
| | - Wei Li
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, and iChEM, Fudan University, Shanghai 200433, China
| | - Dongyuan Zhao
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, and iChEM, Fudan University, Shanghai 200433, China
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36
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Patil SB, Phattepur H, Nagaraju G, Gowrishankar BS. Highly distorted mesoporous S/C/Ti 3+ doped black TiO 2 for simultaneous visible light degradation of multiple dyes. NEW J CHEM 2020. [DOI: 10.1039/d0nj01540g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
S–B-TiO2 exhibited 90 and 96% visible light simultaneous degradation of rose bengal and methylene blue dyes in 80 min, respectively.
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Affiliation(s)
- Shivaraj B. Patil
- Materials Research Laboratory
- Department of Chemistry
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
| | - Harish Phattepur
- Department of Chemical Engineering
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
| | - G. Nagaraju
- Materials Research Laboratory
- Department of Chemistry
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
| | - B. S. Gowrishankar
- Department of Chemical Engineering
- Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi)
- Tumakuru 572103
- India
- Department of Biotechnology
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37
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Singh J, Soni RK. Two-dimensional MoS2 nanosheet-modified oxygen defect-rich TiO2 nanoparticles for light emission and photocatalytic applications. NEW J CHEM 2020. [DOI: 10.1039/d0nj03084h] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
MoS2/TiO2 nanohybrids efficiently decompose organic pollutants under sunlight due to the combined effects of defect creation and hetero-junction formation.
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Affiliation(s)
- Jaspal Singh
- Laser Spectroscopy Laboratory
- Department of Physics
- Indian Institute of Technology Delhi
- Hauz Khas
- India
| | - R. K. Soni
- Laser Spectroscopy Laboratory
- Department of Physics
- Indian Institute of Technology Delhi
- Hauz Khas
- India
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38
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Kuang J, Xing Z, Yin J, Li Z, Tan S, Li M, Jiang J, Zhu Q, Zhou W. Ti3+ self-doped rutile/anatase/TiO2(B) mixed-crystal tri-phase heterojunctions as effective visible-light-driven photocatalysts. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.06.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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39
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Humayun M, Ullah H, Cao J, Pi W, Yuan Y, Ali S, Tahir AA, Yue P, Khan A, Zheng Z, Fu Q, Luo W. Experimental and DFT Studies of Au Deposition Over WO 3/g-C 3N 4 Z-Scheme Heterojunction. NANO-MICRO LETTERS 2019; 12:7. [PMID: 34138054 PMCID: PMC7770730 DOI: 10.1007/s40820-019-0345-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 11/25/2019] [Indexed: 05/12/2023]
Abstract
A typical Z-scheme system is composed of two photocatalysts which generate two sets of charge carriers and split water into H2 and O2 at different locations. Scientists are struggling to enhance the efficiencies of these systems by maximizing their light absorption, engineering more stable redox couples, and discovering new O2 and H2 evolutions co-catalysts. In this work, Au decorated WO3/g-C3N4 Z-scheme nanocomposites are fabricated via wet-chemical and photo-deposition methods. The nanocomposites are utilized in photocatalysis for H2 production and 2,4-dichlorophenol (2,4-DCP) degradation. It is investigated that the optimized 4Au/6% WO3/CN nanocomposite is highly efficient for production of 69.9 and 307.3 µmol h-1 g-1 H2 gas, respectively, under visible-light (λ > 420 nm) and UV-visible illumination. Further, the fabricated 4Au/6% WO3/CN nanocomposite is significant (i.e., 100% degradation in 2 h) for 2,4-DCP degradation under visible light and highly stable in photocatalysis. A significant 4.17% quantum efficiency is recorded for H2 production at wavelength 420 nm. This enhanced performance is attributed to the improved charge separation and the surface plasmon resonance effect of Au nanoparticles. Solid-state density functional theory simulations are performed to countercheck and validate our experimental data. Positive surface formation energy, high charge transfer, and strong non-bonding interaction via electrostatic forces confirm the stability of 4Au/6% WO3/CN interface.
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Affiliation(s)
- Muhammad Humayun
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
- China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Habib Ullah
- Environment and Sustainability Institute (ESI), University of Exeter, Penryn Campus, Penryn, Cornwall, TR10 9FE, UK
| | - Junhao Cao
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Wenbo Pi
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Yang Yuan
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Sher Ali
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Asif Ali Tahir
- Environment and Sustainability Institute (ESI), University of Exeter, Penryn Campus, Penryn, Cornwall, TR10 9FE, UK
| | - Pang Yue
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Abbas Khan
- Department of Chemistry, Abdul Wali Khan University, Mardan, Khyber Pakhtunkhwa, 23200, Pakistan
| | - Zhiping Zheng
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Qiuyun Fu
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
| | - Wei Luo
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
- China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.
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One-Step Hydrothermal Synthesis of P25 @ Few Layered MoS 2 Nanosheets toward Enhanced Bi-catalytic Activities: Photocatalysis and Electrocatalysis. NANOMATERIALS 2019; 9:nano9111636. [PMID: 31752211 PMCID: PMC6915603 DOI: 10.3390/nano9111636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/09/2019] [Accepted: 11/11/2019] [Indexed: 11/16/2022]
Abstract
P25 loaded few layered molybdenum disulfide (MoS2) nanosheets (P25@MoS2) are successfully synthesized through a facile one-step hydrothermal process. The bi-catalytic activities, i.e., photocatalytic and electrocatalytic activities, of the as-prepared nanomaterials have been investigated. For the as-prepared products, the photocatalytic performances were investigated by degrading simulated pollutant under sunlight irradiation, and the hydrogen evolution reaction evaluated the electrocatalytic performances. The results indicate that P25@MoS2 possesses excellent activities in both photocatalysis and electrocatalysis. The presence of MoS2 broadens the light absorption range of P25 and improves the separation and transformation efficiency of photogenerated carriers, thus improving its photocatalytic performance. The existence of P25 inhibits the aggregation of MoS2 to form more dispersed MoS2 nanosheets with only few layers increasing its active sites. Thereby, the electrocatalytic performance is heightened. The excellent multifunction makes the as-prepared P25@MoS2 a promising material in the fields of environment and energy.
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41
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Zhou F, Ren X. Reversible photochromic photocatalyst Bi 2O 3/TiO 2/Al 2O 3 with enhanced visible photoactivity: application toward UDMH degradation in wastewater. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 55:239-255. [PMID: 31674277 DOI: 10.1080/10934529.2019.1682883] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
1,1-Dimethylhydrazine (UDMH) and its by-products were considered carcinogenic toxins and represent a serious health hazard to the population once present in water under natural conditions without treatment. The conventional degradation method suffers from incomplete removal of intermediate products (especially N-nitrosodimethylamine (NDMA)), the powdery catalysis being difficult to recover and results in high energy consumption. In this study, a series of Bi2O3/TiO2/Al2O3 (BTA) photocatalysts have been successfully synthesized by a simple dry mixing method with powder material followed by their immobilization. It was evaluated by the photocatalytic degradation of UDMH present in wastewater, which can be recovered by rapid filtration and utilizes only solar energy. The catalyst exhibited markedly enhanced photocatalytic activity for the degradation of UDMH wastewater compared with conventional TiO2/Al2O3 (TA) catalysts under UV, visible and solar irradiation. Besides, the intermediate NDMA was gradually completely degraded. The photocatalysts were extensively characterized using scanning electron microscopy, energy dispersive spectrometry, specific surface area (BET), X-ray diffraction, X-ray photoelectron spectroscopy, UV-visible diffuse reflectance spectroscopy and photo-electrochemical I-t curves evaluation. The results revealed that all the BTA composites exhibited high stability and stronger absorbance in visible light. In addition, the BTA exhibited a reversible photochromic property that can effectively expand the range of light absorption and enhance the photocatalytic activity. The reversible photochromic properties of BTA explained in the proposed mechanism model are expected to be useful for detecting and sensing UDMH or other organic contaminants.
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Affiliation(s)
- Feng Zhou
- High-Tech Institute of Xi'an, Shaanxi, China
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Irandost M, Akbarzadeh R, Pirsaheb M, Asadi A, Mohammadi P, Sillanpää M. Fabrication of highly visible active N, S co-doped TiO2@MoS2 heterojunction with synergistic effect for photocatalytic degradation of diclofenac: Mechanisms, modeling and degradation pathway. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111342] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Photocatalysis is a multifunctional phenomenon that can be employed for energy applications such as H2 production, CO2 reduction into fuels, and environmental applications such as pollutant degradations, antibacterial disinfection, etc. In this direction, it is not an exaggerated fact that TiO2 is blooming in the field of photocatalysis, which is largely explored for various photocatalytic applications. The deeper understanding of TiO2 photocatalysis has led to the design of new photocatalytic materials with multiple functionalities. Accordingly, this paper exclusively reviews the recent developments in the modification of TiO2 photocatalyst towards the understanding of its photocatalytic mechanisms. These modifications generally involve the physical and chemical changes in TiO2 such as anisotropic structuring and integration with other metal oxides, plasmonic materials, carbon-based materials, etc. Such modifications essentially lead to the changes in the energy structure of TiO2 that largely boosts up the photocatalytic process via enhancing the band structure alignments, visible light absorption, carrier separation, and transportation in the system. For instance, the ability to align the band structure in TiO2 makes it suitable for multiple photocatalytic processes such as degradation of various pollutants, H2 production, CO2 conversion, etc. For these reasons, TiO2 can be realized as a prototypical photocatalyst, which paves ways to develop new photocatalytic materials in the field. In this context, this review paper sheds light into the emerging trends in TiO2 in terms of its modifications towards multifunctional photocatalytic applications.
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Wang X, Chen B, Yan D, Zhao X, Wang C, Liu E, Zhao N, He F. Distorted 1T-ReS 2 Nanosheets Anchored on Porous TiO 2 Nanofibers for Highly Enhanced Photocatalytic Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23144-23151. [PMID: 31252469 DOI: 10.1021/acsami.9b03772] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Recently, loading TiO2 with transition-metal disulfides (TMDs) to construct dual functional heterostructures has been widely researched as an effective strategy to improve the photocatalytic performance of a TiO2 photocatalyst. For the TMD cocatalysts, the 2H-MoS2 and 1T-MoS2 have been widely studied and researched. However, they suffer from poor catalytic activity sites/low charge transfer ability and an unstable structure. In this regard, distorted 1T-phase TMDs with a stable structure are greatly fit for the cocatalyst due to their high charge transfer ability and rich catalytic sites on both the edge and basal plane. Therefore, it is highly desirable to develop distorted 1T-phase TMD/TiO2 heterostructures with well-identified interfaces for highly enhanced photocatalytic performance. Herein, we first introduce distorted 1T-ReS2 anchored on porous TiO2 nanofibers as a promising photocatalyst for achieving an excellent photocatalytic hydrogen production. The excellent performance is attributed to the strong chemical interaction of the Ti-O-Re bond between TiO2 and ReS2, the excellent electron mobility of distorted 1T-ReS2, and the abundant catalytic activity sites on both the plane and edge of the ReS2 cocatalyst.
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Affiliation(s)
- Xinqian Wang
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Biao Chen
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Dedao Yan
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Xinyu Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Chenlu Wang
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
| | - Enzuo Liu
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
- Collaborative Innovation Centre of Chemical Science and Engineering , Tianjin 300072 , P.R. China
| | - Naiqin Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
- Collaborative Innovation Centre of Chemical Science and Engineering , Tianjin 300072 , P.R. China
- Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin University , Tianjin 300072 , P.R. China
| | - Fang He
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials , Tianjin University , Tianjin 300350 , P.R. China
- Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin University , Tianjin 300072 , P.R. China
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45
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Gan L, Wu Y, Song H, Lu C, Zhang S, Li A. Self-doped TiO 2 nanotube arrays for electrochemical mineralization of phenols. CHEMOSPHERE 2019; 226:329-339. [PMID: 30939372 DOI: 10.1016/j.chemosphere.2019.03.135] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 03/19/2019] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
Self-doped TiO2 nanotube arrays (DNTA) were prepared for the electrooxidation of resistant organics. The anatase TiO2 NTAs had an improved carrier density and conductivity from Ti3+ doping, and the oxygen-evolution potential remained at a high value of 2.48 V versus the standard hydrogen electrode, and thus, achieved a highly enhanced removal efficiency of phenol. The second anodization could stabilize Ti3+ and improve the performance by removing surface TiO2 particles. Improper preparation parameters (i.e., a short anodization time, a high calcination temperature and cathodization current density) harmed the electrooxidation activity. Although boron-doped diamond (BDD) anodes performed best in removing phenol, DNTA exhibited a higher mineralization of phenol than Pt/Ti and BDD at 120 min because intermediates were oxidized once they are produced with DNTA. Mechanism investigations using reagents such as tert-butanol, oxalic acid, terephthalic acid, and coumarin showed that the DNTA mineralization resulted mainly from surface-bound OH, and the DNTA produced more than twice the amount of OH compared with BDD. The free OH on the BDD electrode was more conducive to initial substrate oxidation, whereas the adsorbed OH on the DNTA electrode mineralized the organics in situ. The preferential removal of p-substituted phenols on DNTA was attributed mainly to their electromigration and the aromatic intermediates that are hydrophobic were beneficial to mineralization.
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Affiliation(s)
- Ling Gan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Yifan Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Haiou Song
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China; School of the Environment, Nanjing Normal University, Nanjing 210023, PR China; School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China.
| | - Chang Lu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Shupeng Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, PR China; Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 210009, PR China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China; Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 210009, PR China.
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Zhou F, Liu W, Miao Z, Wang Q. Photocatalytic Behaviors of TiO
2
Nanoblets Coated with MoS
2
Nanosheets for Solar‐Driven Photocatalysis. ChemistrySelect 2019. [DOI: 10.1002/slct.201900743] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fang Zhou
- School of PhysicsHarbin Institute of Technology 92 West Dazhi St. Harbin 150001 China
- College of Physical Science & TechnologyYangzhou University No.88 South Daxue Rd. Yangzhou 225002 China
- College of Science & InformationQingdao Agricultural University No.700 Changcheng Rd. Qingdao 266109 China
| | - Wenjun Liu
- School of PhysicsHarbin Institute of Technology 92 West Dazhi St. Harbin 150001 China
| | - Zhilei Miao
- College of Physical Science & TechnologyYangzhou University No.88 South Daxue Rd. Yangzhou 225002 China
| | - Qiang Wang
- College of Physical Science & TechnologyYangzhou University No.88 South Daxue Rd. Yangzhou 225002 China
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Jia PY, Guo RT, Pan WG, Huang CY, Tang JY, Liu XY, Qin H, Xu QY. The MoS2/TiO2 heterojunction composites with enhanced activity for CO2 photocatalytic reduction under visible light irradiation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.045] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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48
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Ye F, Ju S, Liu Y, Jiang Y, Chen H, Ge L, Yan C, Yuan A. Ag-CuO Nanocomposites: Surface-Enhanced Raman Scattering Substrate and Photocatalytic Performance. CRYSTAL RESEARCH AND TECHNOLOGY 2019. [DOI: 10.1002/crat.201800257] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Fen Ye
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Suxiao Ju
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Yuanjun Liu
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Yuerong Jiang
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Hui Chen
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Lihong Ge
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Chao Yan
- School of Materials Science and Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
| | - Aihua Yuan
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; Zhenjiang 212003 China
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Zhang ZG, Liu H, Wang XX, Zhang J, Yu M, Ramakrishna S, Long YZ. One-Step Low Temperature Hydrothermal Synthesis of Flexible TiO₂/PVDF@MoS₂ Core-Shell Heterostructured Fibers for Visible-Light-Driven Photocatalysis and Self-Cleaning. NANOMATERIALS 2019; 9:nano9030431. [PMID: 30875731 PMCID: PMC6473952 DOI: 10.3390/nano9030431] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/05/2019] [Accepted: 03/08/2019] [Indexed: 01/22/2023]
Abstract
Novel flexible and recyclable core-shell heterostructured fibers based on cauliflower-like MoS2 and TiO2/PVDF fibers have been designed through one-step hydrothermal treatment based on electrospun tetrabutyl orthotitanate (TBOT)/PVDF fibers. The low hydrothermal temperature avoids the high temperature process and keeps the flexibility of the as-synthesized materials. The formation mechanism of the resultant product is discussed in detail. The composite of MoS2 not only expands the light harvesting window to include visible light, but also increases the separation efficiency of photo-generated electrons and holes. The as-prepared product has proven to possess excellent and stable photocatalytic activity in the degradation of Rhodamine B and levofloxacin hydrochloride under visible light irradiation. In addition, the TiO2/PVDF@MoS2 core-shell heterostructured fibers exhibit self-cleaning property to dye droplets under visible light irradiation. Meanwhile, due to its hydrophobicity, the resultant product can automatically remove dust on its surface under the rolling condition of droplets. Hence, the as-prepared product cannot only degrade the contaminated compounds on the surface of the material, but also reduce the maintenance cost of the material due to its self-cleaning performance. Therefore, the as-prepared product possesses potential applications in degradation of organic pollutants and water treatment, which makes it a prospective material in the field of environmental treatment.
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Affiliation(s)
- Zhi-Guang Zhang
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
- College of Science & Information, Qingdao Agricultural University, Qingdao 266109, China.
| | - Hui Liu
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
| | - Xiao-Xiong Wang
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
| | - Jun Zhang
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
| | - Miao Yu
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
- Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA.
| | - Seeram Ramakrishna
- Center for Nanofibers & Nanotechnology, Nanoscience & Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, Singapore 117576, Singapore.
| | - Yun-Ze Long
- Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China.
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Guo H, Sen T, Zhang J, Wang L. Hierarchical porous TiO 2 single crystals templated from partly glassified polystyrene. J Colloid Interface Sci 2019; 538:248-255. [PMID: 30513466 DOI: 10.1016/j.jcis.2018.11.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 11/18/2022]
Abstract
Hierarchical macro-mesoporous anatase TiO2 single crystal is one-pot synthesized in an EtOH-H2O system using polystyrene (PS) as the single porogen both for macropore and mesopore and TiF4 as the titanium precursor. The key to the simultaneous growth of single crystal and the introduction of hierarchical pores is the assembly of PS and titania at the glassification temperature of PS (100 °C). During the hydrolytic polymerization of TiF4, PS is encapsulated inside titania and gradually glassified. The interference from elastic PS on the oriental growth of TiO2 crystallite is thus minimized and the final removal of PS through calcination leaves interconnected macropore and mesopore inside the single crystal. According to XPS, EPR and fluorescence analyses, abundant oxygen vacancies are formed on the hierarchical porous single crystal, which presents extraordinary photocatalytic activity and stability in degrading organic pollutants under simulated sunlight irradiation using Rhodamine B as the model. The improved photocatalytic activity is a synergistic effect of improved separation of charge carrier and facilitated interfacial charge transfer benefitting from highly accessible porous single crystal structure.
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Affiliation(s)
- Hongli Guo
- Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, China
| | - Tapas Sen
- Nano-biomaterials Research Group, School of Physical Sciences & Computing, University of Central Lancashire, Preston PR1 2HE, United Kingdom
| | - Jinlong Zhang
- Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, China
| | - Lingzhi Wang
- Key Lab for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai, China.
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