Adsorption and activation of peroxymonosulfate on BiOCl for carbamazepine degradation: The role of piezoelectric effect  

作　　者：Cunjun Li Wencong Liu Xianlei Chen Liang Li Shenyu Lan Mingshan Zhu 

机构地区：[1]Zhoushan Institute of Calibration and Testing for Quality and Technology Supervision,Zhoushan 316012,China [2]School of Environment,Jinan University,Guangzhou 511443,China [3]Department of Environmental Science and Engineering,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Chinese Chemical Letters》2024年第10期421-424,共4页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.22006052);the Science and Technology Program of Guangzhou,China(No.202201020545)。

摘　　要：The adsorption of peroxymonosulfate(PMS)is crucial for PMS activation in the heterogeneous advanced oxidation processes.However,the investigation of PMS adsorption on the piezocatalysts still remains insufficient.In this work,bismuth oxychloride(BiO Cl)nanosheets were prepared as the piezocatalysts for PMS activation under ultrasonic vibration to remove carbamazepine(CBZ)in aqueous solutions.Up to92.5%of CBZ was degraded for 40 min in Bi OCl piezo-activated PMS system with the reaction rate constant of 0.0741 min-1,being 1.63 times that of the sum of BiOCl piezocatalysis,BiOCl-activated PMS,and vibration-activated PMS.PMS adsorption on the surface of BiOCl was specifically studied by comparing the microscopic structure change of the fresh and used Bi OCl.The results suggested that the piezoelectric field of Bi OCl was able to promote the tight adsorption of PMS on the surface,thus facilitating the fast activation of PMS through electrons transfer to produce reactive species(HO·,SO_(4)·-,O_(2)·-,1O_(2)).This work presents an in-depth understanding for the role of piezoelectric effect on the adsorption and activation of PMS.

关 键 词：Peroxymonosulfate adsorption Peroxymonosulfate activation Electron transfer Biocl piezoelectricity Carbamazepine degradation 

分 类 号：X703[环境科学与工程—环境工程] O647.3[理学—物理化学] O643.36[理学—化学]