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Liu F, Fan M, Liu X, Chen J. One-Pot Synthesis of Cellulose-Based Carbon Aerogel Loaded with TiO 2 and g-C 3N 4 and Its Photocatalytic Degradation of Rhodamine B. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1141. [PMID: 38998746 PMCID: PMC11243333 DOI: 10.3390/nano14131141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/14/2024]
Abstract
A cellulose-based carbon aerogel (CTN) loaded with titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) was prepared using sol-gel, freeze-drying, and high-temperature carbonization methods. The formation of the sol-gel was carried out through a one-pot method using refining papermaking pulp, tetrabutyl titanate, and urea as raw materials and hectorite as a cross-linking and reinforcing agent. Due to the cross-linking ability of hectorite, the carbonized aerogel maintained a porous structure and had a large specific surface area with low density (0.0209 g/cm3). The analysis of XRD, XPS, and Raman spectra revealed that the titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) were uniformly distributed in the CTN, while TEM and SEM observations demonstrated the uniformly distributed three-dimensional porous structure of CTN. The photocatalytic activity of the CTN was determined according to its ability to degrade rhodamine B. The removal rate reached 89% under visible light after 120 min. In addition, the CTN was still stable after five reuse cycles. The proposed catalyst exhibits excellent photocatalytic performance under visible light conditions.
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Affiliation(s)
| | | | | | - Jinyang Chen
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, China; (F.L.)
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Samarasinghe LV, Muthukumaran S, Baskaran K. Recent advances in visible light-activated photocatalysts for degradation of dyes: A comprehensive review. CHEMOSPHERE 2024; 349:140818. [PMID: 38056717 DOI: 10.1016/j.chemosphere.2023.140818] [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: 08/24/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/08/2023]
Abstract
The rapid development in industrialization and urbanization coupled with an ever-increasing world population has caused a tremendous increase in contamination of water resources globally. Synthetic dyes have emerged as a major contributor to environmental pollution due to their release in large quantities into the environment, especially owing to their high demand in textile, cosmetics, clothing, food, paper, rubber, printing, and plastic industries. Photocatalytic treatment technology has gained immense research attention for dye contaminated wastewater treatment due to its environment-friendliness, ability to completely degrade dye molecules using light irradiation, high efficiency, and no generation of secondary waste. Photocatalytic technology is evolving rapidly, and the foremost goal is to synthesize highly efficient photocatalysts with solar energy harvesting abilities. The current review provides a comprehensive overview of the most recent advances in highly efficient visible light-activated photocatalysts for dye degradation, including methods of synthesis, strategies for improving photocatalytic activity, regeneration and their performance in real industrial effluent. The influence of various operational parameters on photocatalytic activity are critically evaluated in this article. Finally, this review briefly discusses the current challenges and prospects of visible-light driven photocatalysts. This review serves as a convenient and comprehensive resource for comparing and studying the fundamentals and recent advancements in visible light photocatalysts and will facilitate further research in this direction.
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Affiliation(s)
| | - Shobha Muthukumaran
- Institute for Sustainability Industries and Liveable Cities, College of Sport, Health & Engineering, Victoria University, Melbourne, VIC, 8001, Australia
| | - Kanagaratnam Baskaran
- Faculty of Science, Engineering and Built Environment, Deakin University, Victoria, 3216, Australia
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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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Sorokina LI, Tarasov AM, Pepelyaeva AI, Lazarenko PI, Trifonov AY, Savchuk TP, Kuzmin AV, Tregubov AV, Shabaeva EN, Zhurina ES, Volkova LS, Dubkov SV, Kozlov DV, Gromov D. The Composite TiO 2-CuO x Layers Formed by Electrophoretic Method for CO 2 Gas Photoreduction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2030. [PMID: 37513041 PMCID: PMC10383395 DOI: 10.3390/nano13142030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023]
Abstract
This study demonstrates the ability to control the properties of TiO2-CuOx composite layers for photocatalytic applications by using a simple electrophoretic deposition method from isopropanol-based suspension. To obtain uniform layers with a controlled composition, the surfactant sodium lauryl sulfate was used, which influenced the electrophoretic mobility of the particles and the morphology of the deposited layers. The TiO2-CuOx composite layers with different CuOx contents (1.5, 5.5, and 11 wt.%) were obtained. It is shown that the optical band gap measured by UV-VIS-NIR diffuse reflectance spectra. When CuOx is added to TiO2, two absorption edges corresponding to TiO2 and CuOx are observed, indicating a broadening of the photosensitivity range of the material relative to pure TiO2. An open-circuit potential study shows that by changing the amount of CuOx in the composite material, one can control the ratio of free charge carriers (n and p) and, therefore, the catalytic properties of the material. As a result, the TiO2-CuOx composite layers have enhanced photocatalytic activity compared to the pure TiO2 layer: methanol yield grows with increasing CuOx content during CO2 photoreduction.
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Affiliation(s)
- Larisa I Sorokina
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Andrey M Tarasov
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Anastasiya I Pepelyaeva
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Petr I Lazarenko
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Alexey Yu Trifonov
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
- Scientific Research Institute of Physical Problems Named after F.V. Lukin, Pass. 4806, Bld., Zelenograd, 124498 Moscow, Russia
| | - Timofey P Savchuk
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Artem V Kuzmin
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Aleksey V Tregubov
- S.P. Kapitsa Scientific Technological Research Institute, Ulyanovsk State University, 42 Leo Tolstoy Street, 432017 Ulyanovsk, Russia
| | - Elena N Shabaeva
- S.P. Kapitsa Scientific Technological Research Institute, Ulyanovsk State University, 42 Leo Tolstoy Street, 432017 Ulyanovsk, Russia
| | - Ekaterina S Zhurina
- S.P. Kapitsa Scientific Technological Research Institute, Ulyanovsk State University, 42 Leo Tolstoy Street, 432017 Ulyanovsk, Russia
| | - Lidiya S Volkova
- Institute of Nanotechnology of Microelectronics RAS, 32A Leninsky Prospekt, 119991 Moscow, Russia
| | - Sergey V Dubkov
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
| | - Dmitry V Kozlov
- S.P. Kapitsa Scientific Technological Research Institute, Ulyanovsk State University, 42 Leo Tolstoy Street, 432017 Ulyanovsk, Russia
| | - Dmitry Gromov
- Institute of Advanced Materials and Technologies, National Research University of Electronic Technology-MIET, Bld. 1, Shokin Square, Zelenograd, 124498 Moscow, Russia
- Institute for Bionic Technologies and Engineering, I.M. Sechenov First Moscow State Medical University, Bolshaya Pirogovskaya 2, 119435 Moscow, Russia
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