Lu Yi, Pan Haibo, Lai Jiafeng, Xia Yuzhou, Chen Lu, Liang Ruowen, Yan Guiyang, Huang Renkung
College of Chemistry, Fuzhou University Fuzhou Fujian 350116 P. R. China.
Fujian Key Lab of Medical Instrument and Pharmaceutical Technology, Fuzhou University Fuzhou Fujian 350108 P. R. China.
RSC Adv. 2022 Apr 26;12(20):12702-12709. doi: 10.1039/d2ra01049f. eCollection 2022 Apr 22.
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 ( ≥ 420 nm). The results indicate that CoCu-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 CoCu-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.
光催化剂的有效设计是提高光生载流子分离效率的有效方法，这有助于提升光催化剂的光催化性能。在本研究中，室温下合成了具有双金属结构的CoCu-ZIF材料用于高效光催化燃料脱硝。通过调节钴与铜的摩尔比，可以有效控制CoCu-ZIF光催化剂的性质和结构。采用XRD、FT-IR、SEM、TEM、UV-vis、Raman、BET等技术对所制备的CoCu-ZIF光催化剂进行了表征。利用可见光（≥420 nm）评估了CoCu-ZIF对NCCs脱氮的光活性。结果表明，CoCu-ZIF光催化剂表现出优异的光催化性能，在可见光照射4小时后，脱硝率几乎达到80%，高于ZIF-67的降解能力（38%）。瞬态光电化学实验和EIS奈奎斯特图表明，具有独特结构的CoCu-ZIF能有效提高光生电子-空穴对的分离和转移效率。此外，通过LC-MS分析提出了可能的反应机理。
