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Monocrotophos pesticide effectively removed by novel visible light driven Cu doped ZnO photocatalyst

Hanh N.T. Faculty of Environmental Sciences, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam|
Nguyen M.V. Department of Educational Technology, University of Education, Vietnam National University, 144 Xuan Thuy, Cau Giay, Hanoi, Viet Nam| Binh M.T. VNU Key Laboratory of Advanced Materials for Green Growth, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam| Trang H.T. Faculty of Chemistry, University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam| Minh T.D. Faculty of Chemical Engineering, Ho Chi Minh City University of Food Industry, 140 Le Trong Tan, Ho Chi Minh City, Viet Nam| Pham T.-D. NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, 700000, Viet Nam| Thanh Tung M.H. Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Viet Nam| Van Thuan D. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam| Le Minh Tri N. Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Viet Nam|

Journal of Photochemistry and Photobiology A: Chemistry Số , năm 2019 (Tập 382, trang -)

DOI: 10.1016/j.jphotochem.2019.111923

Tài liệu thuộc danh mục: Scopus

English

Tóm tắt tiếng anh
In the work, we successfully synthesized Cu doped ZnO materials for photocatalytic degradation of monocrotophos pesticide (MCP). The used Cu metal doped into the ZnO matrix created an intermediate band to excite electron from valence band (VB) to conduction band (CD) of the ZnO leading to increase in optical absorption, decrease in band gap as well as photocatalytic performance of the material. Hence, the synthesized photocatalyst showed intense activity for photocatalytic degradation of MCP into CO2, H2O and harmless inorganic ions even under visible radiation. We also investigated that the 3Cu-ZnO photocatalyst, which the weight ratio of Cu/ZnO was 3 wt%, showed the highest MCP degradation efficiency among these synthesized Cu-ZnO. The excess dopants tended to form CuO existing on ZnO surface. The formed CuO acted as a center for recombination of produced electrons and holes resulted in decrease in photocatalytic performance of the Cu-ZnO. Finally, we investigated that the optimal pH for the degradation of MCP by the synthesized Cu doped ZnO photocatalyst was pH 7. � 2019 Elsevier B.V.

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