Enhanced Photocatalytic Activity of O‐deficient Modified CuAl2O4/MoS2 Composite Photocatalysts in Wastewater Treatment Applications

Author:

Han Mengjun1,Wang Shifa1ORCID,Yu Xinmiao1,Zhang Yuanyuan1,Li Maoyuan12,Yi Zao3,Gao Huajing14,Yang Hua5,Fang Leiming6,Syed Asad7

Affiliation:

1. School of Electronic and Information Engineering Chongqing Three Gorges University Wanzhou Chongqing 404000 China

2. School of Materials Science and Engineering Shanghai University Shanghai 200444 China

3. Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and Technology Mianyang 621010 China

4. School of Science Chongqing University of Posts and Telecommunications Nan'an District Chongqing 400065 China

5. School of Science Lanzhou University of Technology Lanzhou 730050 China

6. Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Mianyang Sichuan 621900 China

7. Department of Botany and Microbiology College of Science King Saud University P.O. 2455 Riyadh 11451 Saudi Arabia

Abstract

AbstractThe O‐deficient modified CuAl2O4/MoS2 composite photocatalysts (ODMCAOMSCP) are fabricated by a wet chemical route and low‐temperature treatment for the degradation of tetracycline hydrochloride (TC). The fine particles dotted on the large sheet are revealed to be comprised of large sheets with rich oxygen defects and nanoparticles, which endows it with a high optical absorption coefficient, available reactive species, excellent charge carrier separation, and high photocatalytic activity. The finely designed ODMCAOMSCP achieve a TC degradation first‐order rate constant of 0.01436 min−1, which is 3.99 and 2.70 times higher than that of MoS2 and CuAl2O4, respectively. Response surface analysis reveals that multiple environmental factors including initial TC concentration, catalyst content, and initial pH affect the photocatalytic activity of the catalyst on the basis of backpropagation (BP) neural network optimized by genetic algorithm and Box‐Behnken design. The degradation intermediates and degradation pathways are determined by a liquid chromatograph‐mass spectrometer (LC‐MS). The toxicity of TC over ODMCAOMSCP is studied by the toxicity analysis software and the cultivation of mung bean. Mechanism investigation demonstrates that the major active species of ODMCAOMSCP for the degradation TC are attributed to oxygen vacancy, hydroxyl radical (∙OH), and superoxide radical (∙O2).

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Environmental Science,Renewable Energy, Sustainability and the Environment

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