摘要
近年来,半导体光催化技术在光催化降解药品和个人护理用品方面取得了极大的进展.本文通过简单的水解法控制HCl和Bi(NO3)3·5H2O的不同摩尔比来调控BiOCl的结构,从而提高BiOCl催化剂的光催化性能.利用X射线衍射(XRD)光谱,扫描电子显微镜(SEM),紫外可见漫反射光谱(UV-Vis DRS)表征方法对催化剂进行表征分析.同时研究了催化剂投加量、卡马西平(CBZ)浓度、初始pH值、共存离子和天然有机质对反应体系降解的影响.这些结果表明催化剂投加量为0.4 g/L,CBZ浓度为1.0 mg/L时,120 min后卡马西平的光催化降解效率可达到90.00%,且pH值(3~11)应用范围较广.自由基淬灭实验表明光催化降解CBZ反应中的活性物种为空穴(h^(+))、电子(e^(-))、羟基自由基(HO·)和超氧自由基(·O_(2)^(-)).循环实验证明了BiOCl催化剂具有优异的稳定性.
In recent years,there has been significant progress in semiconductor photocatalysis technology for thedegradation of pharmaceutical and personal care products(PPCPs).This study focuses on enhancing the photocata-lytic peformance of BioCl catalysts by controlling the exposed crystal surfaces through a simple hydrolysis method.The molar ratios of Bi(NO_(3))_(3)·5H_(2)O and HCl were adjusted to regulate the crystal sufaces.The catalysts werecharacterized using X-ray diffraction(XRD),scanning electron microscopy(SEM),and ultraviolet diffuse reflec-tion spectroscopy(UV-Vis DRS).Additionally,the effects of catalyst dosage,carbamazepine(CBZ)concentra-tion,initial pH,co-existing ions,and natural organic matter on the degradation process were investigated.The ex-perimental results demonstrated that under wide pH conditions ranging from 3 to 1l,with a catalyst dosage of 0.4 g/L and a CBZ concentration of 1.0 mg/L,the photocatalytic degradation efficiency of CBZ reached 90.00%after 120 minutes.Free radical quenching experiments revealed that the active species involved in the photocatalytic degradation of CBZ were hole(h^(+)),electron(e^(-)),hydroxyl radical(HO.),and superoxide radical(-O2).Fur-thermore,cycling experiments confirmed the excellent stability of the BioCl catalyst.
作者
翟锦丽
李文杨
晏佳丽
罗永明
高晓亚
ZHAI Jinli;LI Wenyang;YAN Jiali;LUO Yongming;GAO Xiaoya(Faculty of Environmental Science and Engineering,Kumming University of Science and Technology,Kunming 650500,China;The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization ofYunnan Province,Kunming 650500,China;The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province,Kunmig 650500,China)
出处
《昆明理工大学学报（自然科学版）》
北大核心
2023年第4期134-143,共10页
Journal of Kunming University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(42067057)
昆明理工大学高层次人才平台建设项目(10978172)。
