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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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Tang Q, Liu C, Lv D, Zhao L, Jiang L, Wang J. Biotemplated Fe/La-co-doped TiO 2 for photocatalytic depth treatment of compressed leachate from refuse transfer station. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:40941-40957. [PMID: 38837031 DOI: 10.1007/s11356-024-33870-1] [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: 01/03/2024] [Accepted: 05/27/2024] [Indexed: 06/06/2024]
Abstract
Compressed leachate is a contaminated liquid containing various organic and inorganic pollutants produced in municipal refuse transfer stations, which pollute soil and groundwater, posing serious risks to the environment and human health. The Environmental Technology Co., Ltd. (Shenzhen, Guangdong Province, South China) treated compressed leachate obtained from a refuse transfer station. The chemical oxygen demand (COD) (641.2 mg/L) of treated compressed leachate did not meet the wastewater quality standards in China for discharge into municipal sewers (COD ≤ 500 mg/L) and the company's design discharge requirements (COD ≤ 400 mg/L). Therefore, their further in-depth treatment is necessary. To this end, waste tobacco leaves were used as the biotemplate herein, and Fe/La-co-doped TiO2 (xFe,yLa)-TTiO2(g) was synthesized using a solvothermal-assisted biotemplating method. The photocatalytic depth treatment of compressed leachate was performed under simulated solar light using the prepared catalysts. After (3Fe,3La)-TTiO2(g) treatment, the COD of the leachate decreased from 641.2 to 280.1 mg/L, and the COD removal rate was 1.2, 1.1, and 1.6 times higher than that of pure Fe-doped, La-doped and non-biological template TiO2, respectively. Characterization confirmed that the biological template endowed the catalyst with a unique morphology and high specific surface area. Its rich activity sites are conducive to enhancing the adsorption capacity of pollutants and providing an ideal place for photocatalytic reactions. Co-doping with iron and lanthanum ions altered the band structure of TiO2 and promoted the interconversion of Fe3+/Fe2+ and La3+/La2+ during photocatalysis. First-principles density functional theory simulations demonstrated that co-doping Fe and La in TiO2 created impurity levels that facilitated the transfer of photogenerated electrons. This study provides a new purification pathway for the depth treatment of compressed leachate.
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Affiliation(s)
- Qinyuan Tang
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Chang Liu
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Die Lv
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Lixia Zhao
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Liang Jiang
- School of Engineering, Yunnan University, Kunming, 650091, People's Republic of China
| | - Jiaqiang Wang
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China.
- School of Materials and Energy, Yunnan University, Kunming, 650091, People's Republic of China.
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3
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Plaça LF, Vital PLS, Gomes LE, Roveda AC, Cardoso DR, Martins CA, Wender H. Black TiO 2 Photoanodes for Direct Methanol Photo Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:43259-43271. [PMID: 35856741 DOI: 10.1021/acsami.2c04802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Photocatalytic fuel cells (PFCs) are considered the next generation of energy converter devices, since they can harvest solar energy through relatively low-cost semiconductor material to convert the chemical energy of renewable fuels and oxidants directly into electricity. Here, we report black TiO2 nanoparticle (NP) photoanodes for simple single-compartment PFCs and microfluidic photo fuel cells (μPFCs) fed by methanol. We show that Ti3+ and oxygen vacancy (OV) defects at the TiO2 NPs are easily controlled by annealing in a NaBH4-containing atmosphere. This optimized noble-metal-free black TiO2 photoanode shows superior PFC performance for methanol oxidation and O2 reduction with a maximum power density (Pmax) ∼2000% higher compared to the undoped TiO2. At flow conditions, the black TiO2 photoanode showed a Pmax ∼90 times higher than the μFC equipped with regular TiO2 in the dark. The PFC and μPFC operate spontaneously with little activation polarization, and black TiO2 photoanodes are stable under light irradiation. The improved photoactivity of the black TiO2 photoanode is a consequence of the self-doping with Ti3+/OV defects, which significantly red-shifted the bandgap energy, induced intragap electronic states, and widened both the valence band and conduction band, enhancing the overall absorption of visible light and decreasing the interfacial charge transfer resistance.
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Affiliation(s)
- Luiz Felipe Plaça
- Nano&Photon Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
| | - Pedro-Lucas S Vital
- Electrochemistry Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
| | - Luiz Eduardo Gomes
- Nano&Photon Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
- Centro de Tecnologias Estratégicas do Nordeste, Av. Prof. Luiz Freire 01, Recife, Pernambuco 50740-540, Brazil
| | - Antonio Carlos Roveda
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP 13566-590, Brazil
| | | | - Cauê Alves Martins
- Electrochemistry Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
| | - Heberton Wender
- Nano&Photon Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
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Bian L, Wang N, Tuersong K, Kaidierdan A, Li J, Gong J. Oxygen vacancy engineering of TiO 2 nanosheets for enhanced photothermal therapy against cervical cancer in the second near-infrared window. Colloids Surf B Biointerfaces 2023; 229:113427. [PMID: 37441839 DOI: 10.1016/j.colsurfb.2023.113427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/16/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
Cervical cancer is the most common and deadly female cancer on the worldwide scale. Considering that the conventional surgery treatment and chemotherapy would cause certain side effects, photothermal therapy (PTT) possesses desired therapeutic efficiency and insignificant side effects against cervical cancer. However, the lack of efficient and safe photothermal agents that operate in the second near-infrared (NIR-II) window is a main obstacle hindering the clinical transformation of PTT. Titanium dioxide (TiO2)-based nanomaterials are commonly applied in the biomedicine field, but the weak absorption and low photothermal conversion efficiency (PCE) of TiO2 in the NIR region limit their applications in PTT. Herein, we report the oxygen vacancy engineering that is a robust strategy to regulate the electronic structures of TiO2 for photothermal conversion properties optimizing. The obtained oxygen vacancy-doped TiO2-x nanosheets exhibit strong NIR-II absorption and high PCE owing to their decreased bandgap. Specifically, the PCE of TiO2-x nanosheets is determined to be 69.5 % in the efficient NIR-II window, which is much higher than that of widely reported PTT agents. Complete tumor recession without recurrence or pulmonary metastasis is realized by enhanced NIR-II PTT via TiO2-x nanosheets at an ultralow and safe laser exposure (0.6 W/cm2). Our findings suggest that oxygen vacancy engineering of nanomaterials could regulate their photothermal conversion performances, promoting the further application of TiO2-based nanomaterials in the biomedical.
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Affiliation(s)
- Lihua Bian
- Department of Obstetrics and Gynecology, Hainan Hospital of PLA General Hospital, China
| | - Nan Wang
- Department of Obstetrics and Gynecology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Kelibiguli Tuersong
- Department of Obstetrics and Gynecology, Maternal and Child Health Hospital in Hotan, Xinjiang, China
| | - Ayiguzaili Kaidierdan
- Department of Obstetrics and Gynecology, Maternal and Child Health Hospital in Hotan, Xinjiang, China
| | - Jinfeng Li
- Department of Health Toxicology, Faculty of Naval Medicine, Naval Medical University, Shanghai, China
| | - Jing Gong
- Department of Obstetrics and Gynecology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
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5
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Sewnet A, Alemayehu E, Abebe M, Mani D, Thomas S, Lennartz B. Hydrothermal Synthesis of Heterostructured g-C 3N 4/Ag-TiO 2 Nanocomposites for Enhanced Photocatalytic Degradation of Organic Pollutants. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5497. [PMID: 37570204 PMCID: PMC10419520 DOI: 10.3390/ma16155497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/27/2023] [Accepted: 08/04/2023] [Indexed: 08/13/2023]
Abstract
In this study, heterostructured g-C3N4/Ag-TiO2 nanocomposites were successfully fabricated using an easily accessible hydrothermal route. Various analytical tools were employed to investigate the surface morphology, crystal structure, specific surface area, and optical properties of as-synthesized samples. XRD and TEM characterization results provided evidence of the successful fabrication of the ternary g-C3N4/Ag-TiO2 heterostructured nanocomposite. The heterostructured g-C3N4/Ag-TiO2 nanocomposite exhibited the best degradation efficiency of 98.04% against rhodamine B (RhB) within 180 min under visible LED light irradiation. The g-C3N4/Ag-TiO2 nanocomposite exhibited an apparent reaction rate constant 13.16, 4.7, and 1.33 times higher than that of TiO2, Ag-TiO2, and g-C3N4, respectively. The g-C3N4/Ag-TiO2 ternary composite demonstrated higher photocatalytic activity than pristine TiO2 and binary Ag-TiO2 photocatalysts for the degradation of RhB under visible LED light irradiation. The improved photocatalytic performance of the g-C3N4/Ag-TiO2 nanocomposite can be attributed to the formation of an excellent heterostructure between TiO2 and g-C3N4 as well as the incorporation of Ag nanoparticles, which promoted efficient charge carrier separation and transfer and suppressed the rate of recombination. Therefore, this study presents the development of heterostructured g-C3N4/Ag-TiO2 nanocomposites that exhibit excellent photocatalytic performance for the efficient degradation of harmful organic pollutants in wastewater, making them promising candidates for environmental remediation.
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Affiliation(s)
- Agidew Sewnet
- Faculty of Materials Science and Engineering, Jimma Institute of Technology, Jimma University, Jimma P.O. Box 378, Ethiopia; (A.S.); (M.A.); (D.M.)
- Department of Physics, College of Natural and Computational Science, Bonga University, Bonga P.O. Box 334, Ethiopia
| | - Esayas Alemayehu
- Faculty of Civil and Environmental Engineering, Jimma University, Jimma P.O. Box 378, Ethiopia
- Africa Center of Excellence for Water Management, Addis Ababa University, Addis Ababa P.O. Box 1176, Ethiopia
| | - Mulualem Abebe
- Faculty of Materials Science and Engineering, Jimma Institute of Technology, Jimma University, Jimma P.O. Box 378, Ethiopia; (A.S.); (M.A.); (D.M.)
| | - Dhakshnamoorthy Mani
- Faculty of Materials Science and Engineering, Jimma Institute of Technology, Jimma University, Jimma P.O. Box 378, Ethiopia; (A.S.); (M.A.); (D.M.)
| | - Sabu Thomas
- International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam 686560, India;
| | - Bernd Lennartz
- Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-Von-Liebig-Weg 6, 18059 Rostock, Germany
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6
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Xing Z, Wang Z, Chen W, Zhang M, Fu X, Gao Y. Degradation of levofloxacin in wastewater by photoelectric and ultrasonic synergy with TiO 2/g-C 3N 4@AC combined electrode. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 330:117168. [PMID: 36603258 DOI: 10.1016/j.jenvman.2022.117168] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 12/16/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
A novel particle combined electrode named TiO2/g-C3N4@AC (TGCN-AC) was prepared by loading TiO2 and g-C3N4 on activated carbon through gel method, which was used to degrade levofloxacin (LEF) in pharmaceutical wastewater by photoelectric process. The remarkable physicochemical features of particle electrodes were verified by using diverse characterization techniques including SEM-EDS, XRD, FT-IR, BET and pHZPC. EIS-CV and photocurrent showed excellent electrocatalysis and photoelectrocatalysis performance of particle electrodes. The photocatalytic characteristics and fluorescence properties of the particle electrode were proved by UV-vis DRS and PL spectra measurements. Combined with Tauc's plot and Mott-Schottky plots curves, the ECB and EVB of particle electrodes were determined. The experiments on different influence factors such as pH, ultrasonic, aeration, current density and the concentration of LEF were carried out in the photoelectric reactor. Under the conditions of pH values 3.0, 200 W ultrasonic, 8 L/min aeration, the mass ratio of g-C3N4 and TiO2 is 8%, after 4.0 h of photoelectric process, about 94.76% of LEF (20 mg/L) in water was degraded. TGCN-AC also has excellent reusability. The degradation rate of LEF can still reach 71.17% after repeated use for 6 times. Scavenger studies showed that h+ and O2- were the main active species. By observing the colony size of E. coli, it was proved that the LEF in the effluent had no antibacterial activity. The degradation pathways of LEF was analyzed and drawn by HPLC-MS spectra.
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Affiliation(s)
- Zihao Xing
- Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China
| | - Zijing Wang
- Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China
| | - Wenhui Chen
- Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China
| | - Manying Zhang
- Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China
| | - Xiaofei Fu
- Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China
| | - Yong Gao
- Jiangsu Key Laboratory of E-waste Recycling, School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China.
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Saadati A, Habibi-Yangjeh A, Rahim Pouran S, Yekan Motlagh P, Khataee A. Facile integration of brown TiO2−x with Bi4V2O11 and BiVO4: Double S-scheme mechanism for exceptional visible-light photocatalytic performance in degradation of pollutants. ADV POWDER TECHNOL 2023. [DOI: 10.1016/j.apt.2023.103956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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8
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Zahmatkesh S, Hajiaghaei-Keshteli M, Bokhari A, Sundaramurthy S, Panneerselvam B, Rezakhani Y. Wastewater treatment with nanomaterials for the future: A state-of-the-art review. ENVIRONMENTAL RESEARCH 2023; 216:114652. [PMID: 36309214 DOI: 10.1016/j.envres.2022.114652] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/20/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
Aquatic and terrestrial ecosystems are both threatened by toxic wastewater. The unique properties of nanomaterials are currently being studied thoroughly for treating sewage. Nanomaterials also have the advantage of being capable of removing organic matter, fungi, and viruses from wastewater. Advanced oxidation processes are used in nanomaterials to treat wastewater. Additionally, nanomaterials have a large effective area of contact due to their tiny dimensions. The adsorption and reactivity of nanomaterials are strong. Wastewater treatment would benefit from the development of nanomaterial technology. Second, the paper provides a comprehensive analysis of the unique characteristics of nanomaterials in wastewater treatment, their proper use, and their prospects. In addition to focusing on their economic feasibility, since limited forms of nanomaterials have been manufactured, it is also necessary to consider their feasibility in terms of their technical results. According to this study, the significant adsorption area, excellent chemical reaction, and electrical conductivity of nanoparticles (NPs) contribute to the successful treatment of wastewater.
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Affiliation(s)
- Sasan Zahmatkesh
- Tecnologico de Monterrey, Escuela de Ingenieríay Ciencias, Puebla, Mexico.
| | | | - Awais Bokhari
- Sustainable Process Integration Laboratory, SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology, VUT Brno Technická 2896/2, 616 00, Brno, Czech Republic
| | - Suresh Sundaramurthy
- Department of Chemical Engineering, Maulana Azad National Institute of Technology Bhopal, 462 003, Madhya Pradesh, India
| | | | - Yousof Rezakhani
- Department of Civil Engineering, Pardis Branch, Islamic Azad University, Pardis, Iran
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9
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Chen F, Yang M, Shi X, Qin X, Chen Q, Jiang L, Jia C. Ag–TiO2 mesocrystal-coupled g-C3N4 nanosheets with enhanced visible-light photocatalytic activity. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04903-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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Li Y, Wang X, Xia Y, Gao L. A Novel Visible-Light-Driven Photo-Fenton System Composed of Fe-Doped CdIn 2S 4/g-C 3N 4 Heterojunction and H 2O 2 to Remove Methyl Orange. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuzhen Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Wanbailin District 030024, China
| | - Xiaojin Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Wanbailin District 030024, China
| | - Yunsheng Xia
- Department of Chemistry, Bohai University, Jinzhou 121013, China
| | - Lizhen Gao
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Taiyuan, Wanbailin District 030024, China
- School of Mechanical Engineering, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
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11
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Zhao Z, Du H, Shen B, Gao P, Huang C, Guo SQ. A composite photocatalytic system based on spent alkaline Zn-Mn batteries for toluene removal under multiple conditions. ENVIRONMENTAL RESEARCH 2022; 212:113300. [PMID: 35427591 DOI: 10.1016/j.envres.2022.113300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/30/2022] [Accepted: 04/09/2022] [Indexed: 06/14/2023]
Abstract
The resource utilization of spent alkaline Zn-Mn batteries (S-AZMB) has always been a hot issue in the field of energy regeneration and environmental protection. The cumbersome and complicated purification process is the reason for their limited recycling. Not long ago, we proved that unpurified S-AZMB can be used directly: construct a Z-scheme photocatalytic system by combining with commercial TiO2 through high-temperature calcination. In order for this finding to be truly adopted by the application market, the high energy consumption calcination process needs to be improved urgently. In this work, we explore the temperature dependence of performance for the composite photocatalyst (TiO2@S-AZMB). A series of experimental results confirm that lowering the calcination temperature not only conducive to improving the separation efficiency of photogenerated electron-hole pairs, but also can significantly improve the environmental adaptability of the catalyst. Specifically, the catalyst synthesized by calcination temperature at 200 °C exhibits higher toluene removal efficiency than that at 500 °C under different initial concentration of pollutants, relative humidity, light intensity and oxygen content. This study not only further improves the photocatalytic performance of the composite catalyst, but also accords with the idea of energy saving and emission reduction, which provides more space for the possibility of recycling S-AZMB.
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Affiliation(s)
- Zhong Zhao
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Huan Du
- Sichuan Water Conservancy College, Chengdu, 611231, PR China
| | - Boxiong Shen
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China.
| | - Pei Gao
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Chao Huang
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Sheng-Qi Guo
- Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China; Tianjin Eco-City Water Investment and Construction Co., Ltd., Tianjin, 300467, PR China.
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12
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Ni S, Fu Z, Li L, Ma M, Liu Y. Step-scheme heterojunction g-C3N4/TiO2 for efficient photocatalytic degradation of tetracycline hydrochloride under UV light. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129475] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Zhang M, Arif M, Dong Y, Chen X, Liu X. Z-scheme TiO2−x@ZnIn2S4 architectures with oxygen vacancies-mediated electron transfer for enhanced catalytic activity towards degradation of persistent antibiotics. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129530] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Geng B, Zhang S, Yang X, Shi W, Li P, Pan D, Shen L. Cu2-xO@TiO2-y Z-scheme heterojunctions for sonodynamic-chemodynamic combined tumor eradication. CHEMICAL ENGINEERING JOURNAL 2022; 435:134777. [DOI: 10.1016/j.cej.2022.134777] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
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15
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Yang L, Chen Z, Wang X, Jin M. High-Stability Ti3C2-QDs/ZnIn2S4/Ti(IV) Flower-like Heterojunction for Boosted Photocatalytic Hydrogen Evolution. NANOMATERIALS 2022; 12:nano12030542. [PMID: 35159887 PMCID: PMC8840382 DOI: 10.3390/nano12030542] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/14/2022] [Accepted: 01/27/2022] [Indexed: 12/03/2022]
Abstract
The practical application of photocatalytic H2-evolution is greatly limited by its sluggish charge separation, insufficient active sites, and stability of photocatalysts. Zero-dimensional (0D) Ti3C2 MXene quantum dots (MQDs) and amorphous Ti(IV) have been proven to be potential substitutes for noble co-catalyst to accelerate the separation of photogenerated electron-hole pairs and prevent the self-oxidation of photocatalysts, leading to better photocatalytic H2-evolution performance with long-term stability. In this study, amorphous Ti(IV) and MQDs co-catalysts were successfully deposited on ZnIn2S4 (ZIS) microspheres composed of ultra-thin nanosheets via a simple impregnation and self-assembly method (denoted as MQDs/ZIS/Ti(IV)). As expected, the optimal MQDs/ZIS/Ti(IV) sample exhibited a photocatalytic H2-evolution rate of 7.52 mmol·g−1·h−1 and excellent photostability without metallic Pt as the co-catalyst in the presence of Na2S/Na2SO3 as hole scavenger, about 16, 4.02 and 4.25 times higher than those of ZIS, ZIS/Ti(IV), and MQDs/ZIS, respectively. The significantly enhanced photocatalytic H2-evolution activity is attributed to the synergistic effect of the three-dimensional (3D) flower-like microsphere structure, the amorphous Ti(IV) hole co-catalyst, and a Schottky junction formed at the ZIS–MQDs interface, which offers more active sites, suppresses self-photocorrosion, and photo-generates the charge recombination of ZIS.
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Affiliation(s)
- Liqin Yang
- National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (L.Y.); (X.W.)
| | - Zhihong Chen
- International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526000, China;
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou 510006, China
| | - Xin Wang
- National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (L.Y.); (X.W.)
- International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526000, China;
| | - Mingliang Jin
- National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; (L.Y.); (X.W.)
- International Academy of Optoelectronics at Zhaoqing, South China Normal University, Zhaoqing 526000, China;
- Correspondence:
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Geng B, Xu S, Li P, Li X, Fang F, Pan D, Shen L. Platinum Crosslinked Carbon Dot@TiO 2-x p-n Junctions for Relapse-Free Sonodynamic Tumor Eradication via High-Yield ROS and GSH Depletion. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2103528. [PMID: 34859576 DOI: 10.1002/smll.202103528] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/30/2021] [Indexed: 05/23/2023]
Abstract
Sonodynamic therapy as a promising noninvasive modality is being developed for tumor therapy, but there is a lack of next-generation sonosensitizers that can generate full ROS at high yields and simultaneously deplete elevated levels of glutathione (GSH) in tumor cells. Semiconductor p-n junctions are engineered as high-efficacy sonosensitizers for sonodynamic tumor eradication using pyridine N-doped carbon dots (N-CDs) as a p-type semiconductor and oxygen-deficient TiO2-x nanosheets as a n-type semiconductor. The rate constants of 1 O2 and •OH generation by ultrasound-excited N-CD@TiO2-x p-n junctions are 4.3 and 4.5 times higher than those of TiO2 , respectively. A Z-scheme carrier migration mechanism in the p-n junction achieving the rapid spatial separation of the ultrasound-generated electron-hole pairs for enhanced full ROS production is proposed. GSH-cleavable, Pt-crosslinked, N-doped CD fluorescent probes to detect the presence of intracellular GSH are also constructed. A GSH-responsive, p-n junction platform (Pt/N-CD@TiO2-x ) with integrated GSH detection, GSH depletion, and enhanced sonodynamic performance is then assembled. Malignant tumors are completely eradicated without relapse via intravenous administration of low-dose Pt/N-CD@TiO2-x under ultrasound irradiation. This work substantiates the great potential of biocompatible, GSH-responsive p-n junctions as next-generation sonosensitizers via p-n junction-enhanced ROS generation and metal ion oxidation of intracellular GSH.
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Affiliation(s)
- Bijiang Geng
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Shuang Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Ping Li
- School of Life Sciences, Shanghai University, Shanghai, 200444, China
| | - Xiaokai Li
- School of Kinesiology, Shanghai University of Sport, Shanghai, 200438, China
| | - Fuling Fang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Dengyu Pan
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Longxiang Shen
- Department of Orthopedic Surgery, Shanghai Jiao Tong University affiliated Sixth People's Hospital, Shanghai, 200233, China
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Tao N, Li H, Deng L, Zhao S, Ouyang J, Wen M, Chen W, Zeng K, Wei C, Liu YN. A Cascade Nanozyme with Amplified Sonodynamic Therapeutic Effects through Comodulation of Hypoxia and Immunosuppression against Cancer. ACS NANO 2022; 16:485-501. [PMID: 34962762 DOI: 10.1021/acsnano.1c07504] [Citation(s) in RCA: 68] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The tumor microenvironment (TME) featured by immunosuppression and hypoxia is pivotal to cancer deterioration and metastasis. Thus, regulating the TME to improve cancer cell ablation efficiency has received extensive interest in oncotherapy. However, to reverse the immunosuppression and alleviate hypoxia simultaneously in the TME are major challenges for effective cancer therapy. Herein, a multifunctional platform based on Au nanoparticles and a carbon dots modified hollow black TiO2 nanosphere (HABT-C) with intrinsic cascade enzyme mimetic activities is prepared for reversing immunosuppression and alleviating hypoxia in the TME. The HABT-C NPs possess triple-enzyme mimetic activity to act as self-cascade nanozymes, which produce sufficient oxygen to alleviate hypoxia and generate abundant ROS. The theoretical analysis demonstrates that black TiO2 facilitates absorption of H2O and O2, separation of electron-holes, and generation of ROS, consequently amplifying the sonodynamic therapy (SDT) efficiency. Specifically, HABT-C exhibits favorable inhibition of immunosuppressive mediator expression, along with infiltrating of immune effector cells into the TME and reversing the immunosuppression in the TME. As a result, HABT-C can effectively kill tumor cells via eliciting immune infiltration, alleviating hypoxia, and improving SDT efficiency. This cascade nanozyme-based platform (HABT-C@HA) will provide a strategy for highly efficient SDT against cancer by modulation of hypoxia and immunosuppression in the TME.
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Affiliation(s)
- Na Tao
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
| | - Huihuang Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan 410083, PR China
| | - Liu Deng
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
| | - Senfeng Zhao
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
| | - Jiang Ouyang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
| | - Mei Wen
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
| | - Wansong Chen
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
| | - Ke Zeng
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Chuanwan Wei
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - You-Nian Liu
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, PR China
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Wang Y, Zhang C, Zeng Y, Cai W, Wan S, Li Z, Zhang S, Zhong Q. Ag and MOFs-derived hollow Co 3O 4 decorated in the 3D g-C 3N 4 for creating dual transferring channels of electrons and holes to boost CO 2 photoreduction performance. J Colloid Interface Sci 2021; 609:901-909. [PMID: 34865741 DOI: 10.1016/j.jcis.2021.11.153] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 11/19/2022]
Abstract
The rapid recombination of photoinduced charge carriers and low selectivity are still challenges for the CO2 photoreduction. Herein, we proposed that ZIF-67-derived Co3O4 hollow polyhedrons (CoHP) were embedded into NaCl-template-assisted synthesized 3D graphitic carbon nitride (NCN), subsequently, loading Ag by photo-deposition as efficient composites (CoHP@NCN@Ag) for CO2 photoreduction. This integration simultaneously constructs two heterojunctions: p-n junction between Co3O4 and g-C3N4 and metal-semiconductor junction between Ag and g-C3N4, in which Co3O4 and Ag serve as hole (h+) trapping sites and electron (e-) sinks, respectively, achieving spatial separation of charge carriers. The donor-acceptor structure design of NCN realize a good photogenerated e--h+ separation efficiency. The mesoporous structure of hollow Co3O4 facilitate gas-diffusion efficiency, light scattering and harvesting. And the introduction of plasmonic Ag further strengthens the light-harvesting and charge migration. Benefiting from the rational design, the optimized ternary heterostructures exhibit a high CO2-CO yield (562 μmol g-1), which is about 4-fold as high as that of the NCN (151 μmol g-1). Moreover, the conjectural mechanism was systematically summarized. We hope this study provides a promising strategy for designing efficient g-C3N4 systems for the CO2 photoreduction.
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Affiliation(s)
- Yanan Wang
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China
| | - Cheng Zhang
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, PR China
| | - Yiqing Zeng
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, PR China
| | - Wei Cai
- School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, PR China
| | - Shipeng Wan
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Zhongyu Li
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China.
| | - Shule Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
| | - Qin Zhong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
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Chen W, Huang J, He ZC, Ji X, Zhang YF, Sun HL, Wang K, Su ZW. Accelerated photocatalytic degradation of tetracycline hydrochloride over CuAl2O4/g-C3N4 p-n heterojunctions under visible light irradiation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119461] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Sharma S, Mittal A, Singh Chauhan N, Makgwane PR, Kumari K, Maken S, Kumar N. Developments in visible-light active TiO2/SnX (X = S and Se) and their environmental photocatalytic applications – A mini-review. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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21
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Yin H, Fan T, Cao Y, Li P, Yao X, Liu X. Construction of three-dimensional MgIn 2S 4 nanoflowers/two-dimensional oxygen-doped g-C 3N 4 nanosheets direct Z-scheme heterojunctions for efficient Cr(VI) reduction: Insight into the role of superoxide radicals. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126567. [PMID: 34273878 DOI: 10.1016/j.jhazmat.2021.126567] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 06/02/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Environmental crisis aroused from carcinogenic and mutagenic heavy metal Cr(VI)-containing wastewater has attracted great attention. Herein, a direct Z-scheme three-dimensional MgIn2S4 nanoflowers/two-dimensional oxygen-doped g-C3N4 nanosheets heterostructured composite photocatalysts were fabricated for Cr(VI) photoreduction. The crystalline structure, morphology, specific surface areas, chemical components, optical properties, as well as photoelectrochemical performance of the fabricated photocatalyst were systematically studied. All the hybrids photocatalysts exhibited superior Cr(VI) photoreduction performance than a single component. The optimal sample showed 2.0 and 343.7 times increasing than three-dimensional MgIn2S4 nanoflowers and two-dimensional oxygen-doped g-C3N4 nanosheets, respectively. The enhancement of the Cr(VI) photoreduction performance could be ascribed to the enhanced specific surface areas, the improved light absorption, and the Z-scheme charge carriers' separation and migration pathway. Moreover, the role of superoxide radicals was investigated. It is speculated that this research would present a new sight toward photocatalytic Cr(VI) reduction.
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Affiliation(s)
- Hongfei Yin
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Tianle Fan
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Ying Cao
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Pengfei Li
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiaxi Yao
- School of Chemistry and Materials Engineering, Suzhou Key Laboratory of Functional Ceramic Materials, Changshu Institute of Technology, Changshu 215500, China.
| | - Xiaoheng Liu
- Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
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22
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Subramanian S, Ganapathy S, Subramanian S, Ramasamy T, Ramasamy J. Enhancement in visible light photocatalytic performance using silver-decorated nickel titanate nanofiber composite. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108821] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Insights into the in-built Tb4+/Tb3+ redox centers for boosted hydroxyl radical yield and superior separation of charge carriers by investigating Tb2O3/g-C3N4 composite photocatalysts. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.08.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Chahkandi M, Zargazi M, Ahmadi A, Koushki E, Ghasedi A. In situ synthesis of holey g-C 3N 4 nanosheets decorated by hydroxyapatite nanospheres as efficient visible light photocatalyst. RSC Adv 2021; 11:31174-31188. [PMID: 35496852 PMCID: PMC9041532 DOI: 10.1039/d1ra05259d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/29/2021] [Indexed: 12/20/2022] Open
Abstract
The interesting g-C3N4 nanosheet morphology has drawn huge attention in photocatalytic applications because of its special features. Nonetheless, the relative activity of these nanosheets is still controversial due to the low available active sites and the high recombination probability of photo-induced charge carriers. In this work, in situ sol-gel approach was applied to synthesize holey g-C3N4 nanosheets/hydroxyapatite (HAp) nanospheres with plentiful in-plane holes. Herein, the presence of Ca2+ plays a key role in the formation of holey defects on 2D g-C3N4. In-plane holes provide nanosheets with more active edges and diffusion channelsv, resulting in a tremendous enhanced mass and photo-induced charge transfer speed. Moreover, the holes make highly numbered boundaries, which lead to the prevention of aggregation. On the other hand, distributed nano-HAp spheres on these nanosheets can form effective heterojunctions having high photo-degradation ability of pollutants. Intrinsic O-vacancies inside HAp unit cells mainly affect the capture of photogenerated electrons, pollutant molecules, and O2 gas. The synergistic presence of O-vacancies and holey defects (C-vacancies) on 2D g-C3N4 plays a key role in raising the photocatalytic performance of holey g-C3N4/HAp. It can be concluded that the proposed preparation method is a promising approach for simultaneous synthesis of holey g-C3N4 and surface heterojunctions of Ca-based materials. This new structure has shown significant degradation ability of bisphenol A, a prominent pollutant, with a low amount (0.01 g) and short time.
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Affiliation(s)
- Mohammad Chahkandi
- Department of Chemistry, Hakim Sabzevari University Sabzevar 96179-76487 Iran +985144012451 +985144013342
| | - Mahboobeh Zargazi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad Mashhad 91775 Iran
| | - Afsaneh Ahmadi
- Department of Chemistry, Hakim Sabzevari University Sabzevar 96179-76487 Iran +985144012451 +985144013342
| | - Ehsan Koushki
- Department of Physics, Hakim Sabzevari University Sabzevar 96179-76487 Iran
| | - Arman Ghasedi
- Department of Physics, Hakim Sabzevari University Sabzevar 96179-76487 Iran
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25
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Yang C, Wang X, Ma W, Wang Z, Tan G, Fang W, Jin Y. Improving the photodynamic therapy of pyropheophorbide a through the combination of hypoxia-sensitive molecule and infrared light-excited d-TiO2−X nanoparticles. J PORPHYR PHTHALOCYA 2021. [DOI: 10.1142/s1088424621500784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Photodynamic therapy (PDT) involving the generation of cytotoxic reactive oxygen species under light in the presence of sufficient oxygen has been widely used in diagnosing and treating cancer. However, the ubiquitous hypoxia in many solid tumors due to their abnormal proliferation and vascularization has greatly compromised the therapeutic effect. We have designed and prepared a tumor therapeutic nanoplatform for improving PDT based on defective TiO[Formula: see text] (d-TiO[Formula: see text] with the consideration that the continuous PDT would cause hypoxic tumor microenvironment (HTM) in which many hypoxia-sensitive drugs might be activated to exert the antitumor activities. The inorganic d-TiO[Formula: see text] nanoparticles (NPs) were firstly prepared and then modified by APTES to obtain the mesoporous d-TiO[Formula: see text]@SiO2NPs. The organic photosensitizer pyropheophorbide-a (PPa) and hypoxic-sensitive agent 6-aminoflavone (AF) were then adsorbed in the mesoporous SiO2, followed by further hydrophilic PEGylation to improve the biocompatibility. Defective d-TiO[Formula: see text] and the PPa could simultaneously consume oxygen after light excitation, while the resulted HTM was utilized to activate the hypoxic-sensitive agent 6-aminoflavone (AF) to trigger anti-cancer effect. The prepared d-TiO[Formula: see text]@SiO2/PPa/AF@PEG NPs were stable in normal physiological environment, and could continuously release PPa and AF under slightly acidic conditions. The in vitro experiments against cancer cells suggested that the combination of PPa and AF displayed significantly enhanced antitumor activities than that of monotherapy. Therefore, this research offered a potential application for 6-aminoflavone in PDT-induced hypoxia to improve the antitumor effects.
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Affiliation(s)
- Chen Yang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
| | - Xingchao Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
| | - Wei Ma
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
| | - Zhiqiang Wang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
| | - Guanghui Tan
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
| | - Wen Fang
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
| | - Yingxue Jin
- Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, College of Chemistry & Chemical Engineering, Harbin Normal University, Harbin, 150025, P. R. China
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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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27
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Qu X, Lin J, Chaudhary JP, Sun B, Wei F, Fan M, Sun D. Defect enrich ultrathin TiO 2 nanosheets for rapid adsorption and visible light mediated PPCPs degradation. CHEMOSPHERE 2021; 268:128782. [PMID: 33168288 DOI: 10.1016/j.chemosphere.2020.128782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/19/2020] [Accepted: 10/25/2020] [Indexed: 05/20/2023]
Abstract
Recently, PPCPs have attracted extensive attention as emerging pollutants. Due to the strong hydrophilicity and small molecular weight, PPCPs are difficult to be fully removed by adsorption and other processes, posing a serious threat to the ecological environment. Here, we demonstrate solvothermal synthesis of defect enrich TiO2 nanosheets through simple copper doping. Novel TiO2 nanosheets were found to be mesoporous with high specific surface area and exhibited excellent visible light response. Performance of the developed TiO2 nanosheets were evaluated towards photocatalytic degradation of two model pollutants, tetracycline and acetaminophen. Results showed robust degradation of tetracycline and acetaminophen under visible-light irradiation within 100 min. Meanwhile, the potential relationship between the structural characteristics and excellent ability of the catalyst was discussed, as well as probable mechanism. Additionally, a study on the toxicity of tetracycline solution to human skin epidermal cells showed that the toxicity of the treated solution to cells is greatly reduced. The prepared catalysts show good repeatability (a slightly decrease ca.3% after 5 cycles) and applicability, providing a reasonable design for water remediation.
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Affiliation(s)
- Xiao Qu
- Institute of Chemicobiology and Functional Materials, Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, Jiangsu Province, China
| | - Jianbin Lin
- Institute of Chemicobiology and Functional Materials, Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, Jiangsu Province, China
| | - Jai Prakash Chaudhary
- Institute of Chemicobiology and Functional Materials, Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, Jiangsu Province, China
| | - Bianjing Sun
- Institute of Chemicobiology and Functional Materials, Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, Jiangsu Province, China
| | - Feng Wei
- Institute of Chemicobiology and Functional Materials, Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, Jiangsu Province, China
| | - Mengmeng Fan
- Nanjing Forestry University, College of Chemical Engineering, Nanjing, 210037, China.
| | - Dongping Sun
- Institute of Chemicobiology and Functional Materials, Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, Jiangsu Province, China.
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Zhu M, Zhang G, Zhai L, Cao J, Li S, Zeng T. Polarization-enhanced photoelectrochemical properties of BaTiO 3/BaTiO 3-x/CdS heterostructure nanocubes. Dalton Trans 2021; 50:3137-3144. [PMID: 33634821 DOI: 10.1039/d1dt00103e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the aim of improving the photocatalytic activity for water splitting, novel core-shell-structured crystalline-BaTiO3/amorphous-BaTiO3-x/crystalline-CdS composite nanocubes are prepared by a facile two-step synthesis approach. Basic characterization techniques such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and transmission electron microscopy are carried out on the as-prepared composite nanocubes in order to confirm the quality of their crystal structure, morphology and chemical components correspondingly. UV-Vis-NIR measurements of the as-prepared composite nanocubes validate the presence of extended visible-light absorbance due to oxygen-deficient BaTiO3-x. Photoelectrochemical tests are carried out on the as-prepared nanocomposite films that are coated directly on indium tin oxide (ITO) glass substrates. The as-prepared composite nanocubes show a photocurrent density of 100 μA cm-2 without electric field poling, whereas they show about 200 μA cm-2 with an electric field poling of 18.8 kV cm-1. This study suggests that the photoelectrochemical performance is highest in our prepared BaTiO3/BaTiO3-x/CdS composite film compared to the pure BaTiO3, CdS and BaTiO3/BaTiO3-x films, and it may offer a new potential route for designing cost-effective, highly stable and efficient photocatalysts.
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Affiliation(s)
- Mingjun Zhu
- Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Research Institute of Materials, Shanghai 200437, P. R. China.
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Li K, Chen J, Ao Y, Wang P. Preparation of a ternary g-C3N4-CdS/Bi4O5I2 composite photocatalysts with two charge transfer pathways for efficient degradation of acetaminophen under visible light irradiation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118177] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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30
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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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31
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Lee SJ, Begildayeva T, Jung HJ, Koutavarapu R, Yu Y, Choi M, Choi MY. Plasmonic ZnO/Au/g-C 3N 4 nanocomposites as solar light active photocatalysts for degradation of organic contaminants in wastewater. CHEMOSPHERE 2021; 263:128262. [PMID: 33297206 DOI: 10.1016/j.chemosphere.2020.128262] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 05/20/2023]
Abstract
In the present study, novel ZnO/Au/graphitic carbon nitride (g-C3N4) nanocomposites were fabricated via a facile and eco-friendly liquid phase pulsed laser process followed by calcination. Notably, the approach did not necessitate the use of any capping agents or surfactants. The as-prepared photocatalysts were evaluated by various electron microscopy and spectroscopy techniques. The obtained results confirmed good dispersion of the Au nanoparticles (NPs) on the surface of spherical ZnO particles deposited on the g-C3N4 nanosheets. The ZnO/Au/g-C3N4 nanocomposite exhibited substantially enhanced catalytic activity toward the degradation of methylene blue (MB) under simulated solar light irradiation. In particular, the ZnO/Au15/g-C3N4 composite containing 15 wt% Au displayed a rate constant, which was approximately 3 and 5 times greater than those of pristine g-C3N4 and ZnO, respectively. This improved photocatalytic activity of ZnO/Au15/g-C3N4 was attributed to the surface plasmon resonance of Au NPs and the synergistic effects between ZnO and g-C3N4. The boundary between ZnO/Au and g-C3N4 enabled direct migration of the photogenerated electrons from g-C3N4 to ZnO/Au, which hindered the recombination of electron-hole pairs and enhanced the carrier separation efficiency. Additionally, a plausible MB degradation mechanism over the ZnO/Au/g-C3N4 photocatalyst is proposed based on the results of the conducted scavenger study.
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Affiliation(s)
- Seung Jun Lee
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Talshyn Begildayeva
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Hyeon Jin Jung
- Nanomaterials and Nanotechnology Center (Electronic Convergence Division), Korea Institute of Ceramic Engineering & Technology, 101 Soho-ro, Jinju, 52851, South Korea
| | - Ravindranadh Koutavarapu
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Yiseul Yu
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea
| | - Moonhee Choi
- Nanomaterials and Nanotechnology Center (Electronic Convergence Division), Korea Institute of Ceramic Engineering & Technology, 101 Soho-ro, Jinju, 52851, South Korea.
| | - Myong Yong Choi
- Department of Chemistry (BK21 FOUR) and Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea.
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Liu B, Lv M, Jiang W, Gao B, Li Y, Zhou S, Wang D, Liu C, Che G. Self-photoreduced Ag 0-doped Ag( i)–organic frameworks with efficient visible-light-driven photocatalytic performance. CrystEngComm 2021. [DOI: 10.1039/d1ce01133b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A series of Ag0-doped Ag(i)organic frameworks have been constructed via a facile self-photoreduction strategy and can be applied as efficient photocatalysts for the photocatalytic degradation of methyl orange.
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Affiliation(s)
- Bo Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
| | - Mengying Lv
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
| | - Wei Jiang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
- College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P. R. China
| | - Baihui Gao
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
| | - Yuxin Li
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
| | - Shi Zhou
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, P. R. China
| | - Dandan Wang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
- College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P. R. China
| | - Chunbo Liu
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
- College of Environmental Science and Engineering, Jilin Normal University, Siping 136000, P. R. China
| | - Guangbo Che
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P. R. China
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, P. R. China
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33
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Hong JW. Highly Active Binary Exfoliated
MoS
2
Sheet–
Cu
2
O
Nanocrystal Hybrids for Efficient Photocatalytic Pollutant Degradation. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jong Wook Hong
- Department of Chemistry University of Ulsan Ulsan 44610 South Korea
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Tang Y, Li X, Zhang H, Ouyang T, Jiang Y, Mu M, Yin X. Cobalt-based ZIF coordinated hybrids with defective TiO 2-x for boosting visible light-driven photo-Fenton-like degradation of bisphenol A. CHEMOSPHERE 2020; 259:127431. [PMID: 32593823 DOI: 10.1016/j.chemosphere.2020.127431] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/29/2020] [Accepted: 06/14/2020] [Indexed: 06/11/2023]
Abstract
Designing heterostructure of photocatalyst as an efficient approach to boost visible light-driven photocatalytic degradation, we prepared a series of cobalt-based ZIF coordinated with defective TiO2-x, denoted as B-TiO2-x@ZIF-67 composites, through wrapping defective B-TiO2-x on ZIF-67 for promoting photocatalytic degradation efficiency of biphenyl A. The B-TiO2-x@ZIF-67 composites displayed superior photocatalytic performance to pure TiO2-x or ZIF-67 because of faster separation of photogenerated charge carriers and more suitable redox potentials. Such a novel photo-Fenton-like system composed of B-TiO2-x@ZIF-67/H2O2/visible light accelerated the peroxidative degradation of biphenyl An up to a removal efficiency of 95.30%, which is also higher than that of photocatalysis or Fenton-like reaction alone. In addition, the degradation efficiency of biphenyl A is unchanged after catalyst reuse of four cycles. Integrating the trapping experiments and electrochemical analysis, we found the oxygen vacancy on B-TiO2-x capturing the electrons to promote the separation of photogenerated charges, meanwhile the Co(II) in the composite decomposed hydrogen peroxide (H2O2) to produce more •OH radical. Both of them mutually boosted the removal efficiency. Finally, feasible degradation pathways of biphenyl A were proposed based on the assay of LC-MS spectrometry. This strategy offers a novel insight into fabrication of Co-ZIF-based TiO2-x materials and application to visible light-driven photocatalytic and Fenton-like degradation reaction.
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Affiliation(s)
- Yuan Tang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China
| | - Xiaoli Li
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China
| | - Hao Zhang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China
| | - Tianwei Ouyang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China
| | - Yue Jiang
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China
| | - Manman Mu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China.
| | - Xiaohong Yin
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China; Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin, 300384, PR China.
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35
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Cao YQ, Zi TQ, Zhao XR, Liu C, Ren Q, Fang JB, Li WM, Li AD. Enhanced visible light photocatalytic activity of Fe 2O 3 modified TiO 2 prepared by atomic layer deposition. Sci Rep 2020; 10:13437. [PMID: 32778781 PMCID: PMC7417594 DOI: 10.1038/s41598-020-70352-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 07/28/2020] [Indexed: 11/30/2022] Open
Abstract
In this work, commercial anatase TiO2 powders were modified using ultrathin Fe2O3 layer by atomic layer deposition (ALD). The ultrathin Fe2O3 coating having small bandgap of 2.20 eV can increase the visible light absorption of TiO2 supports, at the meantime, Fe2O3/TiO2 heterojunction can effectively improve the lifetime of photogenerated electron-hole pairs. Results of ALD Fe2O3 modified TiO2 catalyst, therefore, showed great visible light driven catalytic degradation of methyl orange compared to pristine TiO2. A 400 cycles of ALD Fe2O3 (~ 2.6 nm) coated TiO2 powders exhibit the highest degradation efficiency of 97.4% in 90 min, much higher than pristine TiO2 powders of only 12.5%. Moreover, an ultrathin ALD Al2O3 (~ 2 nm) was able to improve the stability of Fe2O3-TiO2 catalyst. These results demonstrate that ALD surface modification with ultrathin coating is an extremely powerful route for the applications in constructing efficient and stable photocatalysts.
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Affiliation(s)
- Yan-Qiang Cao
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
- Institute of Micro-Nano Photonic and Beam Steering, School of Science, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Tao-Qing Zi
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Xi-Rui Zhao
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Chang Liu
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Qiang Ren
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Jia-Bin Fang
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Wei-Ming Li
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China
- Jiangsu Leadmicro Nano-Technology Co., Ltd., Wuxi, Jiangsu, People's Republic of China
| | - Ai-Dong Li
- National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Materials Science and Engineering Department, College of Engineering and Applied Sciences, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, People's Republic of China.
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Ying Z, Sun J, Lin X, Wang Y, Hui S, Zhang Y. An innovative magnetic Ni 0.1Co 0.9Fe 2O 4/g-C 3N 4 nano-micro-spherical heterojunction composite photocatalyst with an extraordinarily prominent visible-light-irradiation degradation performance toward organic pollutants. Dalton Trans 2020; 49:9849-9862. [PMID: 32633739 DOI: 10.1039/d0dt01493a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Environmental pollution removal is attracting more attention these days because of increasing environmental problems. The use of photodegradation catalysts is a promising avenue in resolving environmental issues and therefore high-performance photocatalysts are urgently needed. Herein, we solvothermally synthesized a micro-spherical g-C3N4 photocatalyst and a nanospherical Ni0.1Co0.9Fe2O4 photocatalyst, and then innovatively employed small amounts of Ni0.1Co0.9Fe2O4 nanospheres coupled with g-C3N4 microspheres to fabricate a novel magnetic Ni0.1Co0.9Fe2O4/g-C3N4 nano-micro-spherical heterojunction photocatalyst through post co-calcination. Various techniques, including scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy and UV-vis diffuse reflectance spectroscopy, were employed to analyze the as-synthesized hybrid photocatalyst. The resultant photocatalyst exhibits a record high photocatalytic degradation activity against methylene blue under visible-light irradiation with a 100% degradation rate within only 10 min, corresponding to an extraordinarily prominent degradation reaction rate constant k value of up to 0.586 min-1. Our strategy opens a new effective way for fabricating high-performance photocatalysts and our novel Ni0.1Co0.9Fe2O4/g-C3N4 heterojunction photocatalyst is of great potential for application in environmental treatments.
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Affiliation(s)
- Zongrong Ying
- Department of Materials Science and Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Jing Sun
- Department of Materials Science and Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Xuemei Lin
- Department of Materials Science and Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Yuxuan Wang
- Department of Materials Science and Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Shengjie Hui
- Department of Materials Science and Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Yongzheng Zhang
- Department of Materials Science and Engineering, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
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37
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Recent Developments of Advanced Ti3+-Self-Doped TiO2 for Efficient Visible-Light-Driven Photocatalysis. Catalysts 2020. [DOI: 10.3390/catal10060679] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Research into the development of efficient semiconductor photocatalytic materials is a promising approach to solving environmental and energy problems worldwide. Among these materials, TiO2 photocatalysts are one of the most commonly used due to their efficient photoactivity, high stability, low cost and environmental friendliness. However, since the UV content of sunlight is less than 5%, the development of visible light-activated TiO2-based photocatalysts is essential to increase the solar energy efficiency. Here, we review recent works on advanced visible light-activated Ti3+-self-doped TiO2 (Ti3+–TiO2) photocatalysts with improved electronic band structures for efficient charge separation. We analyze the different methods used to produce Ti3+–TiO2 photocatalysts, where Ti3+ with a high oxygen defect density can be used for energy production from visible light. We categorize advanced modifications in electronic states of Ti3+–TiO2 by improving their photocatalytic activity. Ti3+–TiO2 photocatalysts with large charge separation and low recombination of photogenerated electrons and holes can be practically applied for energy conversion and advanced oxidation processes in natural environments and deserve significant attention.
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38
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Yang Z, Xing Z, Feng Q, Jiang H, Zhang J, Xiao Y, Li Z, Chen P, Zhou W. Sandwich-like mesoporous graphite-like carbon nitride (Meso-g-C3N4)/WP/Meso-g-C3N4 laminated heterojunctions solar-driven photocatalysts. J Colloid Interface Sci 2020; 568:255-263. [DOI: 10.1016/j.jcis.2020.02.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/14/2020] [Accepted: 02/15/2020] [Indexed: 01/08/2023]
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Chen H, Xue C, Cui D, Liu M, Chen Y, Li Y, Zhang W. Co 3O 4-Ag photocatalysts for the efficient degradation of methyl orange. RSC Adv 2020; 10:15245-15251. [PMID: 35495451 PMCID: PMC9052209 DOI: 10.1039/c9ra10437b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/30/2020] [Indexed: 11/29/2022] Open
Abstract
In this paper, a series of Co3O4-Ag photocatalysts with different Ag loadings were synthesized by facile hydrothermal and in situ photoreduction methods and fully characterized by XRD, SEM, TEM, FTIR spectroscopy, XPS, UV-vis and PL techniques. The catalysts were used for the degradation of methyl orange (MO). Compared with the pure Co3O4 catalyst, the Co3O4-Ag catalysts showed better activity; among these, the Co3O4-Ag-0.3 catalyst demonstrated the most efficient activity with 96.4% degradation efficiency after 30 h UV light irradiation and high degradation efficiency of 99.1% after 6 h visible light irradiation. According to the corresponding dynamics study under UV light irradiation, the photocatalytic efficiency of Co3O4-Ag-0.3 was 2.72 times higher than that of Co3O4 under identical reaction conditions. The excellent photocatalytic activity of Co3O4-Ag can be attributed to the synergistic effect of strong absorption under UV and visible light, reduced photoelectron and hole recombination rate, and decreased band gap due to Ag doping. Additionally, a possible reaction mechanism over the Co3O4-Ag photocatalysts was proposed and explained.
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Affiliation(s)
- Hongmei Chen
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China Taiyuan Shanxi 030051 China
| | - Chenyang Xue
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China Taiyuan Shanxi 030051 China
| | - Danfeng Cui
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China Taiyuan Shanxi 030051 China
| | - Maoxing Liu
- Department of Mathematics, Qingdao University of Science and Technology Qingdao 266061 China
| | - Yi Chen
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China Taiyuan Shanxi 030051 China
| | - Yuankai Li
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China Taiyuan Shanxi 030051 China
| | - Wendong Zhang
- Science and Technology on Electronic Test and Measurement Laboratory, North University of China Taiyuan Shanxi 030051 China
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Gao Z, Yang H, Mao J, Kang L, Zhang R, Chai S, Wu J, Li W. Araneose Ti 3+ self-doping TiO 2/SiO 2 nanowires membrane for removal of aqueous MB under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:9748-9759. [PMID: 31925693 DOI: 10.1007/s11356-019-07567-9] [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: 08/28/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
Araneose Ti3+ self-doped TiO2/SiO2 nanowires (RTiO2/SiO2) were prepared and anchored onto a polyethersulfone (PES) membrane. Careful characterizations and measurements indicated a covalent grafting of SiO2 onto reduced TiO2 (RTiO2) through Ti-O-Si linkages, acquiring uniformed RTiO2/SiO2 nanowires of almost complete anatase and benign hydrophilicity. The RTiO2/SiO2-based PES membrane showed a significantly enhanced visible light-driven degradation rate of methylene blue (MB) (90.7%), compared with that on bare PES (11.1%) and PES-RTiO2 (59.6%) membranes. The residual MB in filtered water was less than 5% after reusing three times. The normalized permeate flux of the modified membrane was 0.83, and the transmembrane pressure only increased by 0.4 MPa under irradiation of visible light. The improved performance of the PES-RTiO2/SiO2 was attributed to efficient intercept of MB molecular, light harvesting of visible light, and separation of charge carriers on araneose RTiO2/SiO2 nanowires.
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Affiliation(s)
- Zhao Gao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Hanpei Yang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
| | - Jingtao Mao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Li Kang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Ruichen Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Siqi Chai
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Junming Wu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China
| | - Wei Li
- College of Environment and Ecology, Chongqing University, Chongqing, 400044, China.
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41
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Li Y, Wang X, Huo H, Li Z, Shi J. A novel binary visible-light-driven photocatalyst type-I CdIn2S4/g-C3N4 heterojunctions coupling with H2O2: Synthesis, characterization, photocatalytic activity for Reactive Blue 19 degradation and mechanism analysis. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124322] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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42
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Photocatalytic Properties of Copper Nitride/Molybdenum Disulfide Composite Films Prepared by Magnetron Sputtering. COATINGS 2020. [DOI: 10.3390/coatings10010079] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cu3N/MoS2 composite films were prepared by magnetron sputtering under different preparation parameter, and their photocatalytic properties were investigated. Results showed that the composite films surface was uniform and had no evident cracks. When the sputtering power of MoS2 increased from 2 W to 8 W, the photocatalytic performance of the composite films showed a trend of increasing first and then decreasing. Among these films, the composite films with MoS2 sputtering power of 4 W showed the best photocatalytic degradation performance. The photocatalytic degradation rate of methyl orange at 30 min was 98.3%, because the MoS2 crystal in the films preferentially grew over the Cu3N crystal, thereby affecting the growth of the Cu3N crystal. The crystallinity of the copper nitride also increased. During photocatalytic degradation, the proper amount of MoS2 reduced the band gap of Cu3N, and the photogenerated electron hole pairs were easily separated. Thus, the films produces additional photogenerated electrons and promotes the degradation reaction of the composite films on methyl orange solution.
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Li P, Zhang X, Qiu L, Xu X, Si Y, Liang T, Liu H, Chu J, Guo J, Duo S. MOF-derived TiO2 modified with g-C3N4 nanosheets for enhanced visible-light photocatalytic performance. NEW J CHEM 2020. [DOI: 10.1039/d0nj00746c] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A g-C3N4/TiO2 heterojunction was prepared for the first time using a mechanical agitation method assisted by a template method and a two-step calcination method.
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Kuang M, Zhang J, Wang W, Chen J, Cao Y, Liu R, Wang J, Ji Z. The effect of support on the structure and photocatalytic activity of ternary ZnO-ZnFe2O4/palygorskite composite photocatalysts. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2019.08.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Jiang Y, Lin Z, Zhang Y, Lai Y, Liang D, Yang C. Facile synthesis of porous C-doped C 3N 4: fast charge separation and enhanced photocatalytic hydrogen evolution. NEW J CHEM 2020. [DOI: 10.1039/d0nj04169f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A facile gaseous-bubbles templating approach to synthesize porous C-doped g-C3N4 with enhanced photocatalytic activity for hydrogen evolution reaction.
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Affiliation(s)
- Yabin Jiang
- School of Materials
- Sun Yat-Sen University
- Shenzhen, 518107
- P. R. China
| | - Zhuogeng Lin
- School of Materials
- Sun Yat-Sen University
- Shenzhen, 518107
- P. R. China
| | - Yuying Zhang
- School of Materials
- Sun Yat-Sen University
- Shenzhen, 518107
- P. R. China
| | - Yuecheng Lai
- School of Materials
- Sun Yat-Sen University
- Shenzhen, 518107
- P. R. China
| | - Dong Liang
- School of Materials
- Sun Yat-Sen University
- Shenzhen, 518107
- P. R. China
| | - Chunzhen Yang
- School of Materials
- Sun Yat-Sen University
- Shenzhen, 518107
- P. R. China
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Yang Z, Xing Z, Chi D, Li Z, Sun D, Du X, Yin J, Zhou W. Promoted spatial charge separation of plasmon Ag and co-catalyst Co x P decorated mesoporous g-C 3N 4 nanosheet assembly for unexpected solar-driven photocatalytic performance. NANOTECHNOLOGY 2019; 30:485401. [PMID: 31532759 DOI: 10.1088/1361-6528/ab3dd9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Plasmon Ag and co-catalyst Co x P decorated mesoporous graphite carbon nitride nanosheet assemblies have been synthesized via a template-calcination and ball milling strategy combined with photoreduction. The obtained composites are characterized by x-ray diffraction, Fourier transmission infrared spectroscopy, x-ray photoelectron spectroscopy, transmission electron microscopy, and UV-vis diffuse reflectance spectroscopy. The results show that the sample assembly with mesoporous structure has specific surface area of 50.4 m2 g-1, pore size of 11.3 nm and pore volume of 0.21 cm3 g-1. The Ag and Co x P nanoparticles are decorated on the surface of graphite carbon nitride uniformly. Under solar light irradiation, the photocatalytic degradation rate of ceftazidime for the prepared sample assembly is up to ∼92%, and the photocatalytic reaction rate constant is about 10 times higher than that of bare graphite carbon nitride. Moreover, the sample assembly also exhibits a solar-driven photocatalytic hydrogen production rate of 96.66 μmol g-1 h-1. It can attributed to the surface plasmon resonance effect of Ag nanoparticles and Co x P co-catalyst promoting the spatial charge separation and the mesoporous structure providing more surface active sites and favoring mass transfer. This special structure offers new insights for fabricating other high-performance photocatalysts with high spatial charge separation.
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Affiliation(s)
- Zekang Yang
- Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, People's Republic of China
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Sobahi TR, Amin MS. Upgrading the photocatalytic achievement of g-C3N4 nanosheets along decoration with Ag@TiO2 nanospheres for the preparation of vitamin B3. APPLIED NANOSCIENCE 2019. [DOI: 10.1007/s13204-019-00960-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yin J, Xing Z, Kuang J, Li Z, Zhu Q, Zhou W. Dual oxygen vacancy defects-mediated efficient electron-hole separation via surface engineering of Ag/Bi2MoO6 nanosheets/TiO2 nanobelts ternary heterostructures. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Surface-defect-rich mesoporous NH 2-MIL-125 (Ti)@Bi 2MoO 6 core-shell heterojunction with improved charge separation and enhanced visible-light-driven photocatalytic performance. J Colloid Interface Sci 2019; 554:324-334. [PMID: 31306944 DOI: 10.1016/j.jcis.2019.07.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/04/2019] [Accepted: 07/07/2019] [Indexed: 12/19/2022]
Abstract
Mesoporous NH2-MIL-125(Ti)@Bi2MoO6 core-shell heterojunctions with surface defects were fabricated through a facile solvothermal method. The mesoporous core-shell structure with a large relative surface area of 87.7 m2 g-1 and narrow pore size of 8.2 nm extends the photoresponse to the range of visible light due to the narrow band gap of ∼1.89 eV. The visible-light-driven photocatalytic degradation efficiency of highly toxic dichlorophen and trichlorophenol were 93.28 and 92.19%, respectively, and the corresponding rate constants were approximately 8 and 17 times higher than the rates achieved by pristine NH2-MIL-125(Ti). The photocatalytic oxygen production rate was increased to 171.3 µmol g-1. Recycling for several cycles indicates high stability, which is favorable for practical applications. The excellent photocatalytic performance can be ascribed to the formation of the core-shell heterojunctions and to the surface defects that favor charge separation and visible light absorption; the mesoporous structure offers an adequate number of surface active sites and mass transfer. This novel mesoporous core-shell photocatalyst will have potential applications in the environment, and this strategy offers a new insight into fabrication of other high-performance core-shell structure photocatalysts.
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Daneshvar e Asl S, Sadrnezhaad SK. Photocatalytic activity of rutile/anatase TiO2 nanorod/nanobranch thin film loaded with Au@Ag@Au core double shell nanoparticles. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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