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Saputera WH, Yuniar G, Sasongko D. Light-driven methane conversion: unveiling methanol using a TiO 2/TiOF 2 photocatalyst. RSC Adv 2024; 14:8740-8751. [PMID: 38495981 PMCID: PMC10938555 DOI: 10.1039/d4ra00353e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/11/2024] [Indexed: 03/19/2024] Open
Abstract
A TiO2/TiOF2 composite has been synthesized through a hydrothermal method and characterized using X-ray diffraction, Raman spectroscopy, UV-vis diffuse reflectance, SEM-EDX, TEM, and N2 adsorption-desorption isotherms. The percentage of exposed facet [001] and the composition of TiO2/TiOF2 in the composite were controlled by adjusting the amount of HF and hydrothermal temperature synthesis. Three crucial factors in the photocatalytic conversion of methane to methanol, including the photocatalyst, electron scavenger (FeCl2), and H2O2 were evaluated using a statistical approach. All factors were found to have a significant impact on the photocatalytic reaction and exhibited a synergistic effect that enhanced methanol production. The highest methanol yield achieved was 0.7257 μmole h-1 gcat-1. The presence of exposed [001] and fluorine (F) in the catalyst is believed to enhance the adsorption of reactant molecules and provide a more oxidative site. The Fenton cycle reaction between FeCl2 and H2O2 was attributed to reducing recombination and extending the charge carrier lifetime. Incorporating Ag into the TiO2/TiOF2 catalyst results in a significant 2.2-fold enhancement in methanol yield. Additionally, the crucial involvement of hydroxyl radicals in the comprehensive reaction mechanism highlights their importance in influencing the process of photocatalytic methane-to-methanol conversion.
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Affiliation(s)
- Wibawa Hendra Saputera
- Department of Chemical Engineering, Research Group on Sustainable Energy and Technology, Faculty of Industrial Technology, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung 40132 Indonesia
- Center for Catalysis and Reaction Engineering, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung 40132 Indonesia
- Research Center for New and Renewable Energy, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung 40132 Indonesia
| | - Gita Yuniar
- Department of Chemical Engineering, Research Group on Sustainable Energy and Technology, Faculty of Industrial Technology, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung 40132 Indonesia
| | - Dwiwahju Sasongko
- Department of Chemical Engineering, Research Group on Sustainable Energy and Technology, Faculty of Industrial Technology, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung 40132 Indonesia
- Research Center for New and Renewable Energy, Institut Teknologi Bandung Jl. Ganesha no. 10 Bandung 40132 Indonesia
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2
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Chen Y, Wang X, Zeng Z, Lv M, Wang K, Wang H, Tang X. Towards molecular understanding of surface and interface catalytic engineering in TiO 2/TiOF 2 nanosheets photocatalytic antibacterial under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133429. [PMID: 38232545 DOI: 10.1016/j.jhazmat.2024.133429] [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: 10/18/2023] [Revised: 12/20/2023] [Accepted: 01/01/2024] [Indexed: 01/19/2024]
Abstract
TiO2/TiOF2 Z-scheme nanosheets have been successfully synthesized for photocatalytic antibacterial. The antibacterial efficiency of TiO2/TiOF2 against E. coli and S. aureus were 99.90 % and 81.89 % at low material concentration (110 μg/mL), respectively, which are higher than those of pure TiO2, TiOF2, and Degussa P25. In situ molecular spectroscopy results demonstrate that the microstructure of the synthesized material can be reconstructed and optimized to enhance the exposure of the active sites·H2O and O2 are effectively adsorbed on the catalyst surface and activated to form OH…Ti and O…Ti surface active species. Furthermore, the dense interface formed in TiO2/TiOF2 acts as an efficient transport path for photoexcited electrons from TiO2 to TiOF2, and thus accelerates the formation of reactive oxygen species. Finally, the mechanism of bacterial inactivation is systematically discussed considering the main active substances, cell morphological changes, and activity of antioxidant enzymes.
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Affiliation(s)
- Yuanyuan Chen
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, PR China
| | - Xilun Wang
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, PR China
| | - Ziruo Zeng
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, PR China
| | - Meiru Lv
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, PR China
| | - Kangfu Wang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, PR China
| | - Hao Wang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, PR China.
| | - Xiaoning Tang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, PR China.
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3
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Hu Y, Yan Z, Du L, Yu Y, Huang W, Shi Q. Mesoporous black TiO 2 hollow shells with controlled cavity size for enhanced visible light photocatalysis. OPTICS EXPRESS 2023; 31:33883-33897. [PMID: 37859158 DOI: 10.1364/oe.503344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023]
Abstract
Black TiO2 formed by introducing lattice disorder into pristine TiO2 has a narrowed band gap and suppresses the recombination of charge carriers. This provides a potential strategy for visible light photocatalysis. However, the microstructural design of black TiO2 for a higher optimization of visible light is still in high demand. In this work, we proposed the preparation of black TiO2 hollow shells with controllable cavity diameters using silica spheres as templates for the cavities and the NaBH4 reduction method. The decreased cavity size resulted in a hollow shell with an enhanced visible-light absorption and improved photocatalytic performance. Moreover, we demonstrated that this cavity can be combined with gold nanoparticles (AuNPs) to form AuNPs@black TiO2 yolk-shells. The AuNPs provided additional visible light absorption and promoted the separation of photogenerated carriers in the yolk-shell structures. This further improved the photocatalysis, the degradation rate of Cr(VI) can reach 0.066 min-1. Our work evaluated the effect of the cavity size on the photocatalytic performance of hollow and yolk-shell structures and provided concepts for the further enhancement of visible-light photocatalysis.
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Yu J, Tang Q, Liu Y, Zhu Y, Zhang J, Wang J, Li L. Construction of TiO 2/TiOF 2 heterojunction as a cathode material for high-performance Mg 2+/Li + hybrid-ion batteries. J Colloid Interface Sci 2023; 646:587-596. [PMID: 37210906 DOI: 10.1016/j.jcis.2023.05.088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/05/2023] [Accepted: 05/14/2023] [Indexed: 05/23/2023]
Abstract
Anatase TiO2 has attracted significant interest as a cathode material for Mg-ion batteries or Mg2+/Li+ hybrid-ion batteries. However, owing to the semiconductor property and slower Mg2+ diffusion kinetics it still suffers from poor electrochemical performance. Herein, a TiO2/TiOF2 heterojunction consisting of in situ formed TiO2 sheets and TiOF2 rods, was prepared by adjusting the amount of HF in the hydrothermal process, and used as cathode of Mg2+/Li+ hybrid-ion battery. The TiO2/TiOF2 heterojunction prepared by adding 2 mL HF (TiO2/TiOF2-2) exhibits high electrochemical performance, with a high initial discharge capacity (378 mAh/g at 50 mA/g), an outstanding rate performance (128.8 mAh/g at 2000 mA/g), and good cycle stability (capacity retention of 54 % after 500 cycles), which is much superior to that of Pure TiO2 and Pure TiOF2. The reactions of Li+ intercalation/detercalation in the TiO2/TiOF2 heterojunction are revealed by investigating the evolution of the hybrids during different electrochemical states. Moreover, theoretical calculations prove that the Li+ formation energy in the TiO2/TiOF2 heterostructure is much lower than that of TiO2 and TiOF2, demonstrating that the heterostructure plays a crucial role in the enhanced electrochemical performance. This work provides a novel method to design cathode materials with high performance by constructing heterostructure.
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Affiliation(s)
- Juanzhe Yu
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China
| | - Qinke Tang
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China
| | - Yana Liu
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China.
| | - Yunfeng Zhu
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China
| | - Jiguang Zhang
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China
| | - Jun Wang
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China
| | - Liquan Li
- College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, PR China; Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, PR China
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Wang L, Liu Y, Hao J, Ma Z, Lu Y, Zhang M, Hou C. Construction of an S-scheme TiOF 2/HTiOF 3 heterostructures with abundant OVs and OH groups: Performance, kinetics and mechanism insight. J Colloid Interface Sci 2023; 640:15-30. [PMID: 36827845 DOI: 10.1016/j.jcis.2023.02.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/13/2023] [Accepted: 02/18/2023] [Indexed: 02/23/2023]
Abstract
Developing efficient photocatalysts is of crucial significance for the development of photocatalysis techniques. In this work, an S-scheme alkaline-washed TiOF2/HTiOF3(OHTOF) heterostructures with abundant Oxygen vacancies (Ovs) and OH groups was successfully constructed and used to remedy antibiotic wastewater under simulated sunlight. The generation of HTiOF3 was induced by g-C3N4 regulation. The results displayed that OHTOF15 composite possessed the best photocatalytic performance, which could degrade 94.2% tetracyclinehydrochloride (TCH) at a rate speed constant of 1.077 min-1 in 2.5 h. The after-alkali-washing process increased the concentration of OH groups and Ovs defects, and greatly enlarged the surface area. The abundant Ovs and OH groups were conducive to the formation of free radicals' and the transport of charge carriers. Compared with the pristine TiOF2, the absorption sidebands of OHTOF series were greatly red-shifted, which indicated that the increase of OH groups and the etching of the morphology of OHTOF further enhanced its visible-light harvesting ability. Furthermore, the metal cycle of the variable state of Ti4+/Ti3+ in OHTOF15 compensated for the charge balance and promoted the efficient separation of the carriers. Additionally, the apparent quantum efficiency (AQE) of the TCH photodegradation system based on Chemical Oxygen Demand (COD) removal efficiency was calculated to be 0.32%. It was confirmed that the electron transport path in TiOF2/HTiOF3 nanocomposites system followed the S-scheme type, which increased the charge carriers' separation rate and maintained a strong redox capacity. This work could provide some enlightenment for the construction of the semiconducting heterojunction and controllable surface defects engineering.
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Affiliation(s)
- Liping Wang
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Yi Liu
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Jing Hao
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Zhichao Ma
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Yizhuo Lu
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Mingyuan Zhang
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China
| | - Chentao Hou
- College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
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6
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Zhu J, Liu Z, Yang F, Long D, Jian Y, Pu S. The Preparation of {001}TiO 2/TiOF 2 via a One-Step Hydrothermal Method and Its Degradation Mechanism of Ammonia Nitrogen. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15186465. [PMID: 36143777 PMCID: PMC9505796 DOI: 10.3390/ma15186465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 05/06/2023]
Abstract
{001}TiO2/TiOF2 photocatalytic composites with a high activity {001} crystal plane were prepared by one-step hydrothermal methods using butyl titanate as a titanium source and hydrofluoric acid as a fluorine source. X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), raman spectroscopy, N2 adsorption-desorption curve (BET), UV-Vis diffuse absorption spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), and fluorescence spectroscopy (PL) were used to evaluate the structure, morphology, specific surface area, optical properties, and photocarrier separation ability of {001}TiO2/TiOF2. Ammonia nitrogen was taken as the target pollutant, and the degradation performance of the catalyst was investigated. The results show that hydrofluoric acid improves the content of {001} crystal plane of TiO2 with high activity; it also improves the specific surface area and dispersion of the composite material and adjusts the ratio of {001}TiO2 to TiOF2 in the composite material to enhance the absorption capacity of the composite material and reduce the band gap width of the composite material. The degradation rate of ammonia nitrogen by 100 mg F15 is 93.19% when the initial concentration of ammonia nitrogen is 100 mg/L and pH is 10. Throughout the reaction process, the {001}TiO2/TiOF2 composite produces superoxide anion radical (·O2-) and hydroxyl radical (·OH) to oxidize NH3·H2O and generate N2 accompanied by a small amount of NO3- and NO2-.
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Affiliation(s)
- Jiaming Zhu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
| | - Feiyun Yang
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Dingbiao Long
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (D.L.); (S.P.)
| | - Yue Jian
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (D.L.); (S.P.)
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7
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Synthesis of titanium oxyfluoride with oxygen vacancy as novel catalysts for pyrolysis of fluorinated greenhouse gasses to hydrofluoroolefins. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Jian Y, Liu H, Zhu J, Zeng Y, Liu Z, Hou C, Pu S. Preparation of F-doped H 2Ti 3O 7-{104} nanorods with oxygen vacancies using TiOF 2 as precursor and its photocatalytic degradation activity. RSC Adv 2021; 11:35215-35227. [PMID: 35493161 PMCID: PMC9043010 DOI: 10.1039/d1ra07329j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 10/22/2021] [Indexed: 11/21/2022] Open
Abstract
Photocatalytic degradation is an eco-friendly and sustainable method for the treatment of water pollutants especially tetracycline hydrochloride (TCH). Herein, we developed F-doped H2Ti3O7-{104} nanorods with oxygen vacancies using TiOF2 as a precursor by simple alkali hydrothermal and ion-exchange methods. The phase structure, surface composition, optical properties, specific surface areas and charge separation were analysed by a series of measurements. The effects of KOH concentration on the structure and properties of H2Ti3O7 were investigated. It is confirmed that the TiOF2/H2Ti3O7 composite can be formed in low concentration KOH solution (1 mol L-1), while the H2Ti3O7 single phase can be formed in high concentration KOH solution (>3 mol L-1). The prepared F-doped H2Ti3O7-{104} nanorods provide a high specific surface area of 457 m2 g-1 and a macroporous volume of 0.69 cm3 g-1. The appropriate mesoporous structure of the photocatalyst makes TCH have a stronger affinity on its surface, which is more conducive to the subsequent photodegradation. Moreover, a synergistic mechanism of photosensitization and ligand-metal charge transfer (LMCT) in the photocatalytic degradation of TCH was proposed. In addition, the prepared F-doped H2Ti3O7-{104} nanorods showed excellent cycle stability and resistance to light corrosion. After five cycles of photodegradation, the degradation rate of TCH was only reduced from 92% to 83%. This low-cost strategy could be used for the mass production of efficient photocatalysts, which can be used for TCH clean-up in wastewater treatment.
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Affiliation(s)
- Yue Jian
- Chongqing Academy of Animal Sciences Chongqing 402460 China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture and Rural Affairs Chongqing 402460 China
| | - Huayang Liu
- College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China
| | - Jiaming Zhu
- Chongqing Academy of Animal Sciences Chongqing 402460 China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture and Rural Affairs Chongqing 402460 China
| | - Yaqiong Zeng
- Chongqing Academy of Animal Sciences Chongqing 402460 China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture and Rural Affairs Chongqing 402460 China
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences Chongqing 402460 China
| | - Chentao Hou
- College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences Chongqing 402460 China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture and Rural Affairs Chongqing 402460 China
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9
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Application of TiO2-Based Photocatalysts to Antibiotics Degradation: Cases of Sulfamethoxazole, Trimethoprim and Ciprofloxacin. Catalysts 2021. [DOI: 10.3390/catal11060728] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The extensive application of antibiotics in human and veterinary medicine has led to their widespread occurrence in a natural aquatic environment. Global health crisis is associated with the fast development of antimicrobial resistance, as more and more infectious diseases cannot be treated more than once. Sulfamethoxazole, trimethoprim and ciprofloxacin are the most commonly detected antibiotics in water systems worldwide. The persistent and toxic nature of these antibiotics makes their elimination by conventional treatment methods at wastewater treatment plants almost impossible. The application of advanced oxidation processes and heterogeneous photocatalysis over TiO2-based materials is a promising solution. This highly efficient technology has the potential to be sustainable, cost-efficient and energy-efficient. A comprehensive review on the application of various TiO2-based photocatalysts for the degradation of sulfamethoxazole, trimethoprim and ciprofloxacin is focused on highlighting their photocatalytic performance under various reaction conditions (different amounts of pollutant and photocatalyst, pH, light source, reaction media, presence of inorganic ions, natural organic matter, oxidants). Mineralization efficiency and ecotoxicity of final products have been also considered. Further research needs have been presented based on the literature findings. Among them, design and development of highly efficient under sunlight, stable, recyclable and cost-effective TiO2-based materials; usage of real wastewaters for photocatalytic tests; and compulsory assessment of products ecotoxicity are the most important research tasks in order to meet requirements for industrial application.
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Liu Y, Ma Z. TiOF2/g-C3N4 composite for visible-light driven photocatalysis. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126471] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Hou C, Liu H, Li Y. The preparation of three-dimensional flower-like TiO 2/TiOF 2 photocatalyst and its efficient degradation of tetracycline hydrochloride. RSC Adv 2021; 11:14957-14969. [PMID: 35424047 PMCID: PMC8697858 DOI: 10.1039/d1ra01772a] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 04/01/2021] [Indexed: 02/06/2023] Open
Abstract
A kind of high-efficiency photocatalyst of the three-dimensional flower-like TiO2/TiOF2 was synthesized by a one-step hydrothermal method. XRD, FE-SEM, EDS, HTEM, BET, XPS, PL, and UV-Vis-DRS were utilized to characterize the photocatalyst. The photocatalyst of TiO2/TiOF2 shows a narrow band gap of 2.8 eV. The generation of Ti3+ and an oxygen vacancy (Ov) in the photocatalyst are helpful to increase the absorption of visible light, and to inhibit faster charge recombination by capturing photogenerated carriers. Through the degradation of tetracycline hydrochloride (TCH) under simulated sunlight, the photocatalytic activity and stability of the synthesized samples were investigated. The results showed that the removal rate of tetracycline hydrochloride was 59% only in 0.5 h of dark reaction and 85% in 0.5 h of simulated sunlight. The removal efficiency of the photocatalyst for the adsorption and photocatalytic degradation of TCH is higher than that of the single TiO2, TiOF2, and Degussa P25. The synthesized three-dimensional flower-like TiO2/TiOF2 has great application potential in the treatment of antibiotic wastewater.
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Affiliation(s)
- Chentao Hou
- College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China
| | - Huayang Liu
- College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China
| | - Yijie Li
- College of Geology and Environment, Xi'an University of Science and Technology Xi'an 710054 China
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12
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Jiang K, Zhang J, Luo R, Wan Y, Liu Z, Chen J. A facile synthesis of Zn-doped TiO 2 nanoparticles with highly exposed (001) facets for enhanced photocatalytic performance. RSC Adv 2021; 11:7627-7632. [PMID: 35423233 PMCID: PMC8694940 DOI: 10.1039/d0ra09318a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/22/2021] [Indexed: 02/05/2023] Open
Abstract
It is a great challenge to simultaneously improve the visible light absorption capacity and enhance photon-generated carrier separation efficiency of photocatalysts. Herein, Zn-doped TiO2 nanoparticles with high exposure of the (001) crystal face were prepared via a one-step hydrothermal decomposition method. A detailed analysis reveals that the electronic structures were modulated by Zn doping; thus, the responsive wavelength was extended to 600 nm, which effectively improved the visible light absorption of TiO2. More importantly, the surface heterojunction of TiO2 was created because of the co-existing specific facets of (101) and (001). Therefore, the surface separation efficiency of photogenerated electron and hole pairs was greatly enhanced. So, the optimal TiO2 photocatalyst exhibited excellent photocatalytic activity, in which the Rhodamine B (RhB) degradation efficiency was 98.7% in 60 min, under the irradiation of visible light. This study is expected to provide guidance for the rational design of TiO2 photocatalysts.
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Affiliation(s)
- Kun Jiang
- Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University Chengdu 610041 PR China
- College of Materials Science and Engineering, Sichuan University Chengdu 610065 PR China +86-28-8541-8786
| | - Jin Zhang
- College of Materials Science and Engineering, Sichuan University Chengdu 610065 PR China +86-28-8541-8786
| | - Rui Luo
- College of Materials Science and Engineering, Sichuan University Chengdu 610065 PR China +86-28-8541-8786
| | - Yingfei Wan
- College of Materials Science and Engineering, Sichuan University Chengdu 610065 PR China +86-28-8541-8786
| | - Zengjian Liu
- College of Materials Science and Engineering, Sichuan University Chengdu 610065 PR China +86-28-8541-8786
| | - Jinwei Chen
- College of Materials Science and Engineering, Sichuan University Chengdu 610065 PR China +86-28-8541-8786
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13
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Liu Z, Ma Z. Promoting the photocatalytic activity of Bi 4Ti 3O 12 microspheres by incorporating iron. RSC Adv 2020; 10:19232-19239. [PMID: 35515437 PMCID: PMC9054072 DOI: 10.1039/d0ra03305g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 05/08/2020] [Indexed: 11/25/2022] Open
Abstract
Small amounts of Fe(NO3)3 were added to the synthesis mixture prior to the hydrothermal synthesis of Bi4Ti3O12 microspheres. The physicochemical properties of the resulting materials were changed accordingly. The photocatalytic activities of several samples were studied through the photocatalytic degradation of organic pollutants. The samples with a theoretical Fe atomic percentage of 5.9% showed the highest photocatalytic activity among these samples. The main active species in photocatalytic degradation was demonstrated by radical capturing experiments as h+. The introduction of a suitable amount of Fe to the photocatalyst can facilitate the separation of electron-hole pairs generated upon light irradiation, inhibit their recombination efficiently, and prominently expand the light absorption region, thus leading to higher photocatalytic activity.
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Affiliation(s)
- Zhendong Liu
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China
| | - Zhen Ma
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University Shanghai 200433 P. R. China
- Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 P. R. China
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Jian Y, Liu H, Zhu J, Zeng Y, Liu Z, Hou C, Pu S. Transformation of novel TiOF2 nanoparticles to cluster TiO2-{001/101} and its degradation of tetracycline hydrochloride under simulated sunlight. RSC Adv 2020; 10:42860-42873. [PMID: 35514916 PMCID: PMC9058001 DOI: 10.1039/d0ra08476j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 11/19/2020] [Indexed: 11/21/2022] Open
Abstract
The anatase type cluster TiO2-{001/101} was rapidly generated by a one-step hydrothermal method. The transformation process of coral-like TiOF2 nanoparticles to cluster TiO2-{001/101} was investigated for the first time, and the sensitization between cluster TiO2-{001/101} and tetracycline hydrochloride (TCH) was also discussed. The degradation rate of TCH by cluster TiO2-{001/101} under simulated sunlight was 92.3%, and the total removal rate was 1.76 times that of P25. Besides, cluster TiO2-{001/101} settles more easily than P25 in deionized water. The study showed that cluster TiO2-{001/101} derived from coral-like TiOF2 nanoparticles had a strong adsorption effect on TCH, which was attributed to the oxygen vacancy (Ov) and {001} facets of cluster TiO2-{001/101}. The strong adsorption effect promoted the sensitization between cluster TiO2-{001/101} and TCH, and widened the visible light absorption range of cluster TiO2-{001/101}. In addition, the fluorescence emission spectrum showed that cluster TiO2-{001/101} had a lower luminous intensity, which was attributed to the heterojunction formed by {001} facets and {101} facets that reduces the recombination rate of carriers. It should be noted that cluster TiO2-{001/101} still has good degradation performance for TCH after five cycles of degradation. This study provides a new idea for the synthesis of cluster TiO2-{001/101} with high photocatalytic performance for the treatment of TCH wastewater. Degradation of tetracycline hydrochloride by cluster TiO2-{001/101} under simulated sunlight.![]()
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Affiliation(s)
- Yue Jian
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
| | - Huayang Liu
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- China
| | - Jiaming Zhu
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
| | - Yaqiong Zeng
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
| | - Chentao Hou
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences
- Chongqing 402460
- China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest
- Ministry of Agriculture and Rural Affairs
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15
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Liu Z, Ma Z. Facile synthesis of Bi2S3/BiOCl0.5Br0.5 microspheres with enhanced photocatalytic activity under visible light irradiation. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.04.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Jiao Z, Liu Z, Ma Z. Rodlike AgI/Ag 2Mo 2O 7 Heterojunctions with Enhanced Visible-Light-Driven Photocatalytic Activity. ACS OMEGA 2019; 4:7919-7930. [PMID: 31459880 PMCID: PMC6648513 DOI: 10.1021/acsomega.9b00806] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 04/19/2019] [Indexed: 06/10/2023]
Abstract
Novel AgI/Ag2Mo2O7 heterojunctions were prepared by reacting Ag2Mo2O7 microrods with an aqueous KI solution at room temperature. The composite materials, compared with neat AgI and Ag2Mo2O7, showed much higher activities in the photocatalytic degradation of aqueous rhodamine B, methyl orange, tetracycline hydrochloride, and levofloxacin solutions under visible-light irradiation. The structures, morphologies, and other physicochemical properties of AgI, Ag2Mo2O7, and AgI/Ag2Mo2O7 composites were studied via various characterization techniques. The active species involved in the photocatalytic process were examined via radical-capturing experiments and electron spin resonance. Superoxide anion radicals (•O2 -) and photogenerated holes (h+) were found to be the main active species. Photocatalytic mechanisms were proposed and reasons for the enhanced photocatalytic activity were explained.
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Affiliation(s)
- Zhongyi Jiao
- Shanghai
Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3),
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, P. R. China
| | - Zhendong Liu
- Shanghai
Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3),
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, P. R. China
| | - Zhen Ma
- Shanghai
Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3),
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, P. R. China
- Shanghai
Institute of Pollution Control and Ecological Security, Shanghai 200092, P. R. China
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17
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Hou C, Xie J, Yang H, Chen S, Liu H. Preparation of Cu2O@TiOF2/TiO2and its photocatalytic degradation of tetracycline hydrochloride wastewater. RSC Adv 2019; 9:37911-37918. [PMID: 35541816 PMCID: PMC9075813 DOI: 10.1039/c9ra07999h] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 11/07/2019] [Indexed: 12/07/2022] Open
Abstract
Cu2O@TiOF2/TiO2composites with large surfaces were prepared by a hydrothermal method and exhibited excellent activity under simulated solar light, showing high efficiency for tetracycline hydrochloride photocatalytic degradation, and reusability.
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Affiliation(s)
- Chentao Hou
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- People's Republic of China
| | - Jianqiong Xie
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- People's Republic of China
| | - Haolan Yang
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- People's Republic of China
| | - Shumin Chen
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- People's Republic of China
| | - Hualin Liu
- College of Geology and Environment
- Xi'an University of Science and Technology
- Xi'an 710054
- People's Republic of China
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