摘要
采用一步溶剂热的方法成功制备了微量多壁碳纳米管(MWCNT)修饰的溴氧化铋(BiOBr)复合材料,实现了对盐酸四环素(TC)的高效稳定降解.在MWCNT添加量为0.01mg(0.001wt%)时,制得的MWCNT/BiOBr催化剂具有较低的光致发光强度、较大的光电流和较小的EIS弧,显著提高了光催化效率.性能的显著提高是由于MWCNT的高捕获电子能力,它不仅能增强光吸收,而且还加速了电荷载流子的分离.通过自由基捕获实验和电子自旋共振(ESR)确定其主要活性组分为·O2^ˉ,并提出了提高复合材料光催化活性的可能机理.
Trace amount multi-walled carbon nanotubes(MWCNT)modified BiOBr were successfully fabricated via a one-step solvothermal method for efficient and stable degradation of tetracycline hydrochloride(TC).The MWCNT/BiOBr photocatalysts exhibited excellent photocatalytic with low PL intensity,high photocurrent,and small EIS arc at the optimal loading amount of MWCNT 0.01mg(0.001wt%),The significant enhancement of as-prepared MWCNT/BiOBr may be assigned to the high capture electron capability of MWCNT,which not only enhance the absorption of lights but also accelerate the separation of photogenerated charge carriers.Based on the trapping experiment and electron spin resonance(ESR),the possible mechanism of enhancing the photocatalytic activity for the composites was also proposed,in which the·O2^-was deemed to the primary active oxidants.
作者
赵洪飞
陈林
贺凤婷
秦初硕
王帅军
赵朝成
董培
王艺璇
乔帅
高海涛
ZHAO Hong-fei;CHEN Lin;HE Fengting;QIN Chu-shuo;WANG Shuai-jun;ZHAO Chao-cheng;DONG Pei;WANG Yi-xuan;QIAO Shuai;GAO Hai-tao(College of Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China;State Key Laboratory of Petroleum Pollution Control and Treatment,Beijing 102206,China;School of Engineering,Edith Cowan University,Joondalup WA 6027,Australia;Transportation Surveillence and Emergency Response Center of Shan Dong Province,Jinan 250002,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2019年第11期4704-4711,共8页
China Environmental Science
基金
国家水体污染与治理科技重大项目(2016ZX05040003)
中国石油大学(华东)研究生创新工程资助项目(YCX2019049)
作者简介
赵洪飞(1995-),男,山东临沂人,中国石油大学(华东)硕士研究生,主要研究方向为光催化处理废水.发表论文3篇;责任作者:赵朝成,教授,zhaochch0821@163.com。
