Chen Mao-Long, Lu Tian-Hui, Li Shan-Shan, Wen Li, Xu Zhou, Cheng Yun-Hui
College of Chemistry and Food Engineering, Changsha University of Science & Technology, Changsha, Hunan, China.
Environ Sci Pollut Res Int. 2022 Mar;29(13):19583-19593. doi: 10.1007/s11356-021-17187-x. Epub 2021 Oct 31.
Imidacloprid as a widely used neonicotinoid insecticide can cause harmful pesticide residue inevitably. Metal-organic frameworks (MOFs) were innovatively composited to improve the light absorption and degradation performance of BiWO semiconductor, which expanded the photodegradation application in solving environmental problems. Based on the synergistic effect of BiWO and NH-MIL-88B(Fe), a BiWO/NH-MIL-88B(Fe) (BNM) heterojunction photocatalyst with high-performance of photocatalytic degradation activities was successfully synthesized. The optimized BNM catalyst had a good degradation rate under visible light, which was mainly caused by generation of the active ·OH. Transient photocurrent response and electrochemical impedance tests verified that 1:2 BNM exhibits a highest charge separation and a lowest carrier recombination rate which were favorable to the photocatalytic activity. Cycle experiments show that the composite photocatalyst had good reusability and stability which were very important for potential industry applications.
吡虫啉作为一种广泛使用的新烟碱类杀虫剂，不可避免地会导致有害农药残留。创新性地将金属有机框架（MOF）复合，以提高BiWO半导体的光吸收和降解性能，这扩展了光降解在解决环境问题方面的应用。基于BiWO和NH-MIL-88B(Fe)的协同效应，成功合成了具有高性能光催化降解活性的BiWO/NH-MIL-88B(Fe)（BNM）异质结光催化剂。优化后的BNM催化剂在可见光下具有良好的降解率，这主要是由活性·OH的产生所致。瞬态光电流响应和电化学阻抗测试证实，1:2的BNM表现出最高的电荷分离和最低的载流子复合率，这有利于光催化活性。循环实验表明，复合光催化剂具有良好的可重复使用性和稳定性，这对潜在的工业应用非常重要。
