Abstract
CuxO/Bi2O3 oxides grown on nickel foam were synthesized via an electrodeposition method to degrade indoor HCHO under visible light irradiation and fully characterized by XRD, SEM, FT-IR, and UV-Vis technologies. The characterization results showed that the CuxO/Bi2O3 oxides were successfully loaded on nickel foam and the visible light response spectrum was expanded to 740 nm. Plackett–Burman design combined with central composite design has been used to optimize factors that affect HCHO removal performance. The results demonstrated that bismuth nitrate content, polyethylene glycol 600 content, sintering time, and lactic acid concentration were the four most important factors affecting the HCHO removal performance over CuxO/Bi2O3 sample. The optimum CuxO/Bi2O3 sample could degrade 88.796% of HCHO in 300 min at the conditions of 4.28 mol/L lactic acid, 4.86% polyethylene glycol 600, 194.03 min sintering time, and 45.83 g bismuth nitrate, and the HCHO removal rate remained 82.3% after five cycles. A plausible mechanism for the degradation of HCHO under visible light irradiation was proposed. This work provides a feasible solution for removing indoor formaldehyde in the field of photocatalysis.
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This work was supported by the National Natural Science Foundation of China (No. 21467002); Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China, (No. ERESEP2020Z13); Project for Guangxi College Young and Middle-aged Teachers Basic Capability Improvement (No.2019KY0050; 2018KY0079); Innovation Project of Guangxi Graduate Education (XYCSZ2020045); and College Student Innovation and Entrepreneurship Project (202110602070).
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Lin Zhihao: conceptualization, writing – original draft; Meng Mianwu: writing – review and editing, supervision; Ding Hua: investigation, formal analysis; Zhang Qi: formal analysis; Duan Chaomin: visualization, software; Chen Chaoshu: funding acquisition; Huang Siyu: resources; Zhou Zhenming: data curation.
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Lin, ., Meng, M., Ding, H. et al. Synthesis and characterization of CuxO/Bi2O3 oxides for removal of HCHO under visible light irradiation. Environ Sci Pollut Res 28, 69059–69073 (2021). https://doi.org/10.1007/s11356-021-15294-3
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DOI: https://doi.org/10.1007/s11356-021-15294-3