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Feng J, Feng Q, Xin J, Liang Q, Li X, Chen K, Teng J, Wang S, Feng L, Liu J. Fabrication of durable self-cleaning photocatalytic coating with long-term effective natural light photocatalytic degradation performance. CHEMOSPHERE 2023; 336:139316. [PMID: 37356587 DOI: 10.1016/j.chemosphere.2023.139316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/21/2023] [Accepted: 06/22/2023] [Indexed: 06/27/2023]
Abstract
The practical application of photocatalytic coating has been greatly challenged in terms of its long-term effective natural light photocatalytic degradation due to its vulnerability and easy contamination caused by poor self-cleaning properties. In this work, photocatalytic coating with self-cleaning properties was prepared by spraying fluorinated dual-scale TiO2 on the inorganic lithium silicate adhesive, enabling excellent durability and long-term effective photocatalytic degradation performance under natural light. The coating exhibits superhydrophobic properties even after abrasion testing, acid and alkali immersion testing, and UV aging, laying a foundation for the practical use. Moreover, the coating can be applied to various substrates and its excellent self-cleaning properties make it resistant to particulate and liquid contamination that may occur in the environment. Besides, we evaluated the photocatalytic stability of the coating by subjecting it to acidic and alkaline environments and high pollution concentrations. Furthermore, benefiting from the synergistic effect of photocatalytic and self-cleaning properties, the coating achieves long-term effective photocatalytic degradation of dye wastewater under natural light, which still has a high removal rate of 95.8% for methylene blue even after 30 cycles of use. Meanwhile, due to the coating's excellent durability, the long-term quality loss rate of the coating still remained below 0.3%, which avoids the risk of secondary environmental pollution caused by nanoparticle leakage. Therefore, these excellent properties enable the coating to have a broad range of application prospects for the treatment of pollutants in water.
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Affiliation(s)
- Jinghang Feng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Qingge Feng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China.
| | - Jingbo Xin
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Qihua Liang
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Xiang Li
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Kao Chen
- School of Materials and Environment, Guangxi Minzu University, Nanning, 530006, China
| | - Jiayang Teng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Sinan Wang
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Lin Feng
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
| | - Junyi Liu
- School of Resources, Environment and Materials, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China; Key Laboratory of Environmental Protection, Guangxi University, No.100, Daxue East Road, Nanning, 530004, China
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Fu Q, Liu Y, Mo J, Lu Y, Cai C, Zhao Z, Wang S, Nie S. Improved Capture and Removal Efficiency of Gaseous Acetaldehyde by a Self-Powered Photocatalytic System with an External Electric Field. ACS NANO 2021; 15:10577-10586. [PMID: 34013716 DOI: 10.1021/acsnano.1c03230] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Using clean and sustainable stochastic energy from the environment to eliminate pollution caused by gaseous aldehydes would be an effective strategy to achieve the sustainable development of energy and preserve the environment. Here, a piston-based triboelectric nanogenerator (P-TENG) was used to enhance gaseous acetaldehyde absorption and photocatalytic degradation. An external electric field could be generated on a conductive substrate by the P-TENG, converting wind energy into electricity. This made it possible to efficiently degrade gaseous acetaldehyde in the photocatalytic system. Driven by a light breeze (3.0 m/s), the acetaldehyde removal rate of the system reached 63% within 30 min. The presence of an external electric field could generate more hydroxyl radicals (•OH), superoxide radicals (•O2-), and holes (h+), which has a positive effect on the photocatalytic degradation of acetaldehyde. The design and concept of this study not only realized the efficient conversion of renewable and sustainable random energy but also could be applied to the efficient removal of gaseous aldehydes, providing an effective way to create a cleaner environment.
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Affiliation(s)
- Qiu Fu
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Yanhua Liu
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Jilong Mo
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Yanxu Lu
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Chenchen Cai
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Zhenxia Zhao
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Shuangfei Wang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
| | - Shuangxi Nie
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China
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Lin Z, Shen W, Roux JC, Xi H. Photo-catalytic degradation of mixed gaseous HCHO and C 6H 6 in paper mills: Experimental and theoretical study on the adsorption behavior simulation and catalytic reaction mechanism. JOURNAL OF HAZARDOUS MATERIALS 2020; 388:121779. [PMID: 31848097 DOI: 10.1016/j.jhazmat.2019.121779] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/08/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
VOCs in paper mills have severely exceeded the emission standards and their photo-catalytic degradations should focus on the experimental and theoretical studies. This work used TiO2 colloid as catalyst to study the photo-catalytic degradations of mixed HCHO and C6H6 at five mixing ratios. The adsorption behaviors of pure forms and mixtures on the TiO2 (101) surface were simulated using density functional theory (DFT), and their catalytic reaction mechanisms were also analyzed. The following results were found: (1) With increasing initial concentration, the enhanced adsorption and easy degradation interpreted the increased degradation rate for pure HCHO, while the counteractions of enhanced adsorption and inhibited catalytic reaction kept the constant degradation rate for pure C6H6. (2) For their mixtures, the HCHO degradation was inhibited at high C6H6 concentration due to the inhibited adsorption and catalytic reaction of HCHO. The C6H6 degradation was slightly weakened at high HCHO concentration and then restored to the normal degradation rate of C6H6, which could be attributed to the weakened adsorption of C6H6 and the easy degradation of HCHO in the initial stage. The combined experimental, simulation, and theoretical results provides sufficient information to understand the photo-catalytic degradation process for mixed gaseous pollutants in different realistic environments.
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Affiliation(s)
- Zhifeng Lin
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Wenhao Shen
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China; State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, PR China.
| | - Jean-Claude Roux
- Laboratory of Pulp and Paper Science and Graphic Arts, Grenoble Institute of Technology - Pagora, 461 Rue de la papeterie, 38400 Saint-Martin d'Hères, France
| | - Hongxia Xi
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China
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