期刊
ARABIAN JOURNAL OF CHEMISTRY
卷 14, 期 12, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.arabjc.2021.103444
关键词
CuO-ZnO/ZiF-8; Heterostructure; MOF-based Nanophotocatalyst; Sono-precipitation; Photodegradation; Acid Orange 7
资金
- University of Tabriz
- Sahand University of Technology
- Iran Nanotechnology Initiative Council
- Water and wastewater Company of Tabriz
Novel CuO-ZnO/ZiF-8 metalorganic frameworks (MOFs) photocatalyst with different mass percentages of ZiF-8 were prepared for water purification applications. The addition of ZiF-8 increased the specific surface area of the photocatalyst, enhancing pollutant adsorption capacity.
In this research, novel CuO-ZnO/ZiF-8 metalorganic frameworks (MOFs) photocatalyst with different mass percentages of ZiF-8 were prepared for water purification applications under visible light. The precipitation method was used to synthesize CuO-ZnO/ZiF-8 photocatalysts. Some techniques, including XRD, FESEM, EDX, BET-BJH, FTIR, DRS, and pH(pzc), were performed to determine the structural, chemical, and optical properties of the prepared samples. DRS analysis represented that CuO-ZnO/ZiF-8(20) had narrower band gap energy compared to CuO-ZnO and ZiF-8. Also, BET-BJH analysis results showed that CuO-ZnO had a low surface area that impeded the absorption of pollutant molecules. In contrast, the CuO-ZnO/ZiF-8(20) sample, due to the presence of ZiF-8, had a high specific surface area which enabled higher pollutant adsorption on the photocatalyst surface. Moreover, the synthesized samples were evaluated for the solar-light-driven removal of different organic dyes, such as Acid Orange 7, Methylene blue, and Malachite green. The tremendously enhanced photocatalytic activity under the simulated solar light with 98.1% removal of AO7 was observed over CuO-ZnO/ZiF-8(20) sample. Then, the effect of initial solution pH as an essential factor on photocatalytic activity was investigated. Finally, the reaction mechanism of AO7 degradation over CuO-ZnO/ZiF-8(20) was proposed. (C) 2021 The Authors. Published by Elsevier B.V.
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