Bimetallic CoCu-ZIF material for efficient visible light photocatalytic fuel denitrification

• Published in: RSC advances Vol. 12; no. 2; pp. 1272 - 1279
• Main Authors: Lu, Yi, Pan, Haibo, Lai, Jiafeng, Xia, Yuzhou, Chen, Lu, Liang, Ruowen, Yan, Guiyang, Huang, Renkung
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 26.04.2022; The Royal Society of Chemistry
• Subjects: Bimetals; Chemistry; Denitrification; Denitrogenation; Fuels; Light irradiation; Nyquist plots; Photocatalysis; Photocatalysts; Reaction mechanisms; Room temperature; Separation
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/d2ra01049f

Effective design of photocatalysts is an effective method to improve the separation of photogenerated carriers, which improves the photocatalytic performance of photocatalysts. In this work, CoCu-ZIF materials with bimetallic structure were synthesized at room temperature for efficient photocatalytic fuel denitrification. The properties and structures of CoCu-ZIF photocatalysts can be effectively controlled by adjusting the molar ratio of cobalt to copper. The as-prepared CoCu-ZIF photocatalysts were characterized by XRD, FT-IR, SEM, TEM, UV-vis, Raman, BET and other techniques. The photoactivity of CoCu-ZIF for the denitrogenation of NCCs has been evaluated using visible light ( λ ≥ 420 nm). The results indicate that Co 8 Cu 2 -ZIF photocatalysts exhibit excellent photocatalytic properties, in which the denitrification rate almost reached 80% after 4 hours under visible light irradiation, which is higher than the degradation ability of ZIF-67 (38%). Transient photoelectrochemical experiments and EIS Nyquist plots indicate that Co 8 Cu 2 -ZIF with unique structure efficiently improves the separation and transfer of photogenerated electron-hole pairs. Moreover, a possible reaction mechanism was proposed by LC-MS analysis. Effective design of photocatalysts is an effective method to improve the separation of photogenerated carriers, which improves the photocatalytic performance of photocatalysts.