BiOBr/ATP的制备及光催化降解四环素性能研究  

Preparation of BiOBr/ATP and its photocatalytic degradation performance of tetracycline

作　　者：李守博 蔡中倩 刘彩云[1,2] 曹成 齐亚娥[1,2] LI Shoubo;CAI Zhongqian;LIU Caiyun;CAO Cheng;QI Yae(Institute of Flexible Composites Application Fundamental Research,Hexi College,Zhangye 734000,Gansu,China;School of Chemistry and Chemical Engineering,Hexi College,Zhangye 734000,Gansu,China;Provincial Key Laboratory of Utilization of Characteristic Resources in Hexi Corridor of Gansu Province,Zhangye 734000,Gansu,China)

机构地区：[1]河西学院柔性复合材料应用基础研究所,甘肃张掖734000 [2]河西学院化学化工学院,甘肃张掖734000 [3]甘肃省河西走廊特色资源利用省级重点实验室,甘肃张掖734000

出　　处：《云南大学学报（自然科学版）》2024年第6期1120-1127,共8页Journal of Yunnan University(Natural Sciences Edition)

基　　金：甘肃省自然科学基金(22JR5RG569);甘肃省高等学校创新基金(2022A−120);河西学院校长基金创新团队(CXTD2022005);甘肃省大学生创新创业训练计划(s202210740030).

摘　　要：通过湿式机械化学合成法一步制备了BiOBr/ATP复合光催化剂,利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、红外光谱(FT-IR)和X射线能谱(XPS)等对所制备催化剂的微观结构和形貌进行表征,通过在可见光照射下光催化降解四环素评价催化剂的活性,并考察了其降解四环素类抗生素的性能和机理.结果表明,凹凸棒土棒晶(ATP)与溴氧铋(BiOBr)纳米片之间形成了插层结构,且在ATP质量分数为5%时,复合材料的光催化效果最佳,四环素降解率达到88.23%.通过自由基抑制实验推测主要作用是(·O^(2−)),并提出了可能的四环素降解机制.根据活性物种捕获实验,·O^(2−)和·OH是主要活性物种,h^(+)和e^(−)是次要活性物种.瞬态光电流测试表明,BiOBr/ATP复合光催化剂的光电流增强是BiOBr的1.24倍.BiOBr/ATP composite photocatalysts were prepared in one step by wet mechanochemical synthesis,and the microstructure and morphology of the prepared catalysts were characterized by scanning electron microscopy(SEM),X-ray diffractometry(XRD),infrared spectroscopy(FT-IR)and X-ray spectroscopy(XPS).And degradation activity of the catalysts were evaluated by photocatalytic degradation of tetracycline under visible light irradiation,and its performance and mechanism for the degradation of tetracycline antibiotics was investigated.The results showed that an intercalation structure was formed between the bumpy clay rod crystals(ATP)and bismuth oxybromide(BiOBr)nanosheets,and the photocatalytic effect of the composites was optimal at a mass fraction of ATP of 5%,with the tetracycline degradation rate reaching 88.23%.The main role was hypothesized to be(·O^(2−))by free radical inhibition experiments,and a possible mechanism of tetracycline degradation was proposed.According to the active species capture experiments,·O^(2−)and·OH were the major active species,and h^(+)and e^(−)were the minor active species.The transient photocurrent test showed that the photocurrent enhancement of BiOBr/ATP composite photocatalyst was 1.24 times higher than that of BiOBr.

关 键 词：溴氧铋 凹凸棒土 光催化 四环素 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X703[环境科学与工程—环境工程]