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BERKTAŞ A, KARTAL ÖE. Decolorization of Reactive Black 5 Using N-Doped TiO2. GAZI UNIVERSITY JOURNAL OF SCIENCE 2021. [DOI: 10.35378/gujs.828761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wang Y, Guan J, Li L, Wang Z, Yuan X, Yan Y, Li X, Lu N. Graphite-bridged indirect Z-scheme system TiO 2-C-BiVO 4 film with enhanced photoelectrocatalytic activity towards serial bisphenols. ENVIRONMENTAL RESEARCH 2020; 191:110221. [PMID: 32946890 DOI: 10.1016/j.envres.2020.110221] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 09/02/2020] [Accepted: 09/12/2020] [Indexed: 06/11/2023]
Abstract
Due to the increase in the occurrence of bisphenols (BPs) in the environments, it is urgent to develop efficient and ecofriendly methods for their removal. A novel, indirect Z-scheme TiO2-C-BiVO4 film was prepared by a sol-gel method combined with hydrothermal carbonization. The doped graphite carbon was generated in situ from glucose, which acted as an electron-transfer bridge for the Z-scheme system to enhance the heterojunction tightness between TiO2 and BiVO4. This resulted in an increasing separation efficiency of photogenerated electrons and holes and a stronger redox ability of the TiO2-C-BiVO4 film for the degradation and detoxification of BPs. The degradation efficiency of BPs was over 95% in 240 min, except for that of 4,4'-sulphonyldiphenol (BPS) due to the presence of the OSO group, and all of the BPs were nearly completely mineralized when the reaction time reached 360 min. Consequently, the inhibition ratio towards Vibrio fischeri decreased significantly along with the loss and mineralization of aromatic intermediates during photoelectrocatalytic degradation. 2,2-bis(4-Hydroxyphenyl) butane (BPB), 4,4'-(1-phenylethylidene)-bisphenol (BPAP), and (4,4'-hexafluoroisopropylidene) diphenol (BPAF), with relatively high toxicity levels and lipophilicity and as toxic product precursors, require attention in terms of environmental safety. Overall, this work provides a promising and environmentally friendly way to remove BPs from water.
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Affiliation(s)
- Yaqi Wang
- School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Jiunian Guan
- School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Lu Li
- School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Zirui Wang
- School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Xing Yuan
- School of Environment, Northeast Normal University, Changchun, 130117, PR China.
| | - Yu Yan
- Institute of Environmental Assessment, China Northeast Municipal Engineering Design & Research Institute Co., Ltd, Changchun, 130021, PR China
| | - Xiaodan Li
- Institute of Environmental Assessment, China Northeast Municipal Engineering Design & Research Institute Co., Ltd, Changchun, 130021, PR China
| | - Nan Lu
- School of Environment, Northeast Normal University, Changchun, 130117, PR China.
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Wu N, Bai P, Yang T, Li H, Zhang J, Chai Z, Wang X. Complementary behavior of doping and loading in Ag/C-ZnTa 2O 6 for efficient visible-light photocatalytic redox towards broad wastewater remediation. Photochem Photobiol Sci 2020; 19:1042-1053. [PMID: 32609133 DOI: 10.1039/d0pp00056f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This work reports on the simple fabrication of a silver loaded and carbon doped zinc tantalate (Ag/C-ZnTa2O6) photocatalyst with visible light photocatalytic activity toward broad wastewater remediation, including high photo-reduction of Cr(vi) (98.4% in 210 min), excellent photo-oxidation of tetracycline hydrochloride (94.7% in 210 min), and superior photo-degradation of multiple dyes (>99.0% within 210 min). The optimal photocatalytic performance of Ag/C-ZnTa2O6 is mainly due to the excellent visible light absorption capacity and superior electron-hole separation efficiency, which is ascribed to the complementary behavior between carbon doping and silver loading. Particularly, the generation of defects due to C-doping is greatly inhibited by Ag-loading, and the SPR effect of Ag nanoparticles is enhanced due to the obstruction of Ag+ by C doping.
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Affiliation(s)
- Niri Wu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
| | - Ping Bai
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
| | - Ting Yang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
| | - Hui Li
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
| | - Jingyu Zhang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
| | - Zhanli Chai
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China.
| | - Xiaojing Wang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, 010021, Hohhot, China
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Parangi T, Mishra MK. Titania Nanoparticles as Modified Photocatalysts: A Review on Design and Development. COMMENT INORG CHEM 2019. [DOI: 10.1080/02603594.2019.1592751] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Tarun Parangi
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, Gujarat, India
| | - Manish Kumar Mishra
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, Gujarat, India
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Abstract
Undoubtedly, carbon-based (nano)composites can be promising photocatalysts with improved photocatalytic activity due to the coupling effect from the incorporation of carbon species. In this mini-review, we focus on the recent development of photocatalysts based on carbon-based (nano)composites. TiO2 is well-known as a typical photocatalyst. Special attention is paid to the various types of carbon–TiO2 composites such as C-doped TiO2, N–C-doped TiO2, metal–C-doped TiO2, and other co-doped C/TiO2 composites. Various synthetic strategies including the solvothermal/hydrothermal method, sol–gel method, and template-directed method are reviewed for the preparation of carbon-based TiO2 composites. C/graphitic carbon nitride (g-C3N4) composites and ternary C-doped composites are also summarized and ascribed to the unique electronic structure of g-C3N4 and the synergistic effect of the ternary interfaces, respectively. In the end, we put forward the future perspective of the photocatalysts containing carbon species based on our knowledge.
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Effect of precursor structure on mixed-crystal phase titanium oxide synthesized by sol-gel reaction in supercritical carbon dioxide. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Deposition of Visible Light-Active C-Doped Titania Films via Magnetron Sputtering Using CO₂ as a Source of Carbon. NANOMATERIALS 2017; 7:nano7050113. [PMID: 28509883 PMCID: PMC5449994 DOI: 10.3390/nano7050113] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 05/09/2017] [Accepted: 05/11/2017] [Indexed: 11/16/2022]
Abstract
Doping of titanium dioxide with p-block elements is typically described as an efficient pathway for the enhancement of photocatalytic activity. However, the properties of the doped titania films depend greatly on the production method, source of doping, type of substrate, etc. The present work describes the use of pulsed direct current (pDC) magnetron sputtering for the deposition of carbon-doped titania coatings, using CO₂ as the source of carbon; ratios of O₂/CO₂ were varied through variations of CO₂ flow rates and oxygen flow control setpoints. Additionally, undoped Titanium dioxide (TiO₂) coatings were prepared under identical deposition conditions for comparison purposes. Coatings were post-deposition annealed at 873 K and analysed with scanning electron microscopy (SEM), X-ray diffreaction (XRD), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). The photocatalytic properties of the thin films were evaluated under ultraviolet (UV) and visible light irradiation using methylene blue and stearic acid decomposition tests. Photoinduced hydrophilicity was assessed through measurements of the water contact angle under UV and visible light irradiation. It was found that, though C-doping resulted in improved dye degradation compared to undoped TiO₂, the UV-induced photoactivity of Carbon-doped (C-doped) photocatalysts was lower for both model pollutants used.
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Kinoshita M, Shimoyama Y. Dynamic phase behavior during sol-gel reaction in supercritical carbon dioxide for morphological design of nanostructured titania. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2016.05.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sun YY, Zhang S. Kinetics stabilized doping: computational optimization of carbon-doped anatase TiO2 for visible-light driven water splitting. Phys Chem Chem Phys 2016; 18:2776-83. [DOI: 10.1039/c5cp07109g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon dimers exhibiting strong C–C binding could be ideal kinetics-stabilized dopants enhancing the visible-light activity of TiO2 for photocatalysis.
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Affiliation(s)
- Yi-Yang Sun
- Department of Physics
- Applied Physics, & Astronomy
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Shengbai Zhang
- Department of Physics
- Applied Physics, & Astronomy
- Rensselaer Polytechnic Institute
- Troy
- USA
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