Lv Chenhan, Cheng Haixiang, Fan Rui, Sun Jingyu, Liu Xinghai, Ji Yinghui
College of Chemical and Materials Engineering, Quzhou University, Quzhou, 324000, PR China.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, PR China.
Heliyon. 2024 Aug 29;10(17):e37024. doi: 10.1016/j.heliyon.2024.e37024. eCollection 2024 Sep 15.
Organic fluorine compounds are acute carcinogenic and mutagenic to humans. Photoelectrocatalysis (PEC) treatment is an innovative technology in the field of the removal of fluorine compounds, and thus current research focused on improving stability and catalytic ability of photoanode. In this study, it has been synthesized a rGO/BiOI photocathode for the efficient degradation of 4-Fluoroaniline (4-FA). The physical characterization and photoelectrochemical properties of the photocathode was determined. The results indicate that the PEC treatment with the rGO/BiOI photocathode was more efficient compared with individual processes. During the optimization experiments, the PEC treatment achieved 99.58 % and 72.12 % of 4-FA degradation and defluorination within 1 h. Cyclic stability experiments show that rGO/BiOI photocathode was efficient and stable, which reached 96.91 % and 67.64 % of 4-FA degradation and defluorination after five cycles. Mechanism analysis indicates that the PEC process was based on an electrochemical reaction and photo-induced processes. The degradation product of 4-FA was mainly 2,4-di-t-butylphenol, and trapping experiments indicates that h is the primary oxidizing species. Therefore, PEC treatment with rGO/BiOI photocathode is a competitive green approach to remove fluorine compounds pollutants and brings new insights into development of PEC treatment.
有机氟化合物对人类具有急性致癌和致突变性。光电催化（PEC）处理是氟化合物去除领域的一项创新技术，因此目前的研究集中在提高光阳极的稳定性和催化能力上。在本研究中，合成了一种用于高效降解4-氟苯胺（4-FA）的rGO/BiOI光阴极。测定了光阴极的物理特性和光电化学性质。结果表明，与单独的处理过程相比，使用rGO/BiOI光阴极的PEC处理效率更高。在优化实验中，PEC处理在1小时内实现了4-FA降解和脱氟率分别为99.58%和72.12%。循环稳定性实验表明，rGO/BiOI光阴极高效且稳定，经过五个循环后，4-FA降解和脱氟率分别达到96.91%和67.64%。机理分析表明，PEC过程基于电化学反应和光诱导过程。4-FA的降解产物主要是2,4-二叔丁基苯酚，捕获实验表明h是主要的氧化物种。因此，使用rGO/BiOI光阴极的PEC处理是一种有竞争力的去除氟化合物污染物的绿色方法，并为PEC处理的发展带来了新的见解。
