化工进展2024，Vol.43Issue(3)：1565-1575,11.DOI:10.16085/j.issn.1000-6613.2023-0367
DBD等离子体耦合BiOI催化材料降解苯甲羟肟酸的特性与机制
Performance and mechanism of the degradation of benzohydroxamic acid by DBD plasma-coupled BiOI catalytic materials
摘要
Abstract
A dielectric barrier discharge(DBD)plasma catalytic system was established at ambient temperature and pressure to investigate the effect of discharge parameters on the degradation of benzohydroxamic acid(BHA)by plasma.The catalysts prepared by hydrothermal synthesis were characterized,and the changes in total organic carbon(TOC),pH,and ∙OH radicals during the degradation were analyzed.LC-MS was used to determine the intermediates of the degradation reaction to investigate the reaction's mechanism.Characteristics of the synthesized BiOI included a high specific surface area,a high pore volume,and high-purity mesoporous nanosheet microspheres.In addition,the DBD could change the crystalline shape and structure of the catalyst,rendering it better catalytic performance.The degradation performance results showed that peak voltage and the volume of blast gas had a significant influence on the degradation rate of BHA.The best result was achieved by adding 0.3g of BiOI catalyst to couple with DBD plasma at a BHA concentration of 80mg/L,a volume of 1000mL,a peak voltage of 24kV,a frequency of 7500Hz,and a blast volume of 30L/min.This increased the degradation rate of BHA from 78.8％to 88.2％compared to the DBD system alone.The degradation mechanism analysis showed that ∙OH was the main active reactant for BHA degradation.Under plasma catalysis,BHA is oxidized and opened to intermediates such as benzoic acid and 2-hydroxyacetic acid,leading to the generation of H2O and CO32-.关键词
介质阻挡放电/等离子体/废水/降解/矿化率/催化剂Key words
dielectric barrier discharge/plasma/waste water/degradation/mineralization rate/catalyst分类
资源环境引用本文复制引用
董冰岩,李贞栋,王佩祥,涂文娟,谭艳雯,张芹..DBD等离子体耦合BiOI催化材料降解苯甲羟肟酸的特性与机制[J].化工进展,2024,43(3):1565-1575,11.基金项目
国家自然科学基金(51567010,51167007). （51567010,51167007）
