BiOBr/BiOIO3复合材料的合成及光催化性能研究

X703; 构建异质结是促进光生载流子分离的有效途径,并可提高半导体光催化材料的光催化活性.采用水热法制备了BiOBr和BiOIO3,用超声浸渍法制备BiOBr/BiOIO3复合光催化材料.通过XRD、SEM、TEM、XPS、UV-Vis、FT-IR和PL等表征方法分析了材料的多相结构和化学键.以罗丹明B和环丙沙星为目标污染物,通过降解实验分析光催化材料的活性和降解机理.结果表明:可见光照射60 min后,1.4-BiOBr/BiOIO3对罗丹明B的降解率,达98％,降解速率常数为0.06894 min-1,且5次重复实验后降解率仍可达到85％;可见光照射120 min后,1.4-BiOBr/...

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Published in工业水处理 Vol. 42; no. 12; pp. 91 - 99
Main Authors 徐成栋, 胡浩, 王安慰, 邵敏, 万玉山
Format Journal Article
LanguageChinese
Published 常州大学环境科学与工程学院,江苏常州 213164 01.12.2022
Subjects
染料废水
光催化
纳米材料
异质结
Online AccessGet full text
ISSN1005-829X
DOI10.19965/j.cnki.iwt.2022-0150

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Abstract X703; 构建异质结是促进光生载流子分离的有效途径,并可提高半导体光催化材料的光催化活性.采用水热法制备了BiOBr和BiOIO3,用超声浸渍法制备BiOBr/BiOIO3复合光催化材料.通过XRD、SEM、TEM、XPS、UV-Vis、FT-IR和PL等表征方法分析了材料的多相结构和化学键.以罗丹明B和环丙沙星为目标污染物,通过降解实验分析光催化材料的活性和降解机理.结果表明:可见光照射60 min后,1.4-BiOBr/BiOIO3对罗丹明B的降解率,达98％,降解速率常数为0.06894 min-1,且5次重复实验后降解率仍可达到85％;可见光照射120 min后,1.4-BiOBr/BiOIO3对环丙沙星的降解率可达82.6％.以上实验结果可归结为BiOBr/BiOIO3异质结构在BiOBr和BiOIO3之间存在协同作用,异质结的形成拓宽了半导体的可见光吸收范围,阻止光生电子-空穴的复合.自由基捕获实验表明O2·-和h+是降解过程的主要活性物种.提出了BiOBr/BiOIO3材料光催化降解罗丹明B的可能机理,以期为设计和制备高效、绿色、稳定的光催化剂提供新的途径.
AbstractList X703; 构建异质结是促进光生载流子分离的有效途径,并可提高半导体光催化材料的光催化活性.采用水热法制备了BiOBr和BiOIO3,用超声浸渍法制备BiOBr/BiOIO3复合光催化材料.通过XRD、SEM、TEM、XPS、UV-Vis、FT-IR和PL等表征方法分析了材料的多相结构和化学键.以罗丹明B和环丙沙星为目标污染物,通过降解实验分析光催化材料的活性和降解机理.结果表明:可见光照射60 min后,1.4-BiOBr/BiOIO3对罗丹明B的降解率,达98％,降解速率常数为0.06894 min-1,且5次重复实验后降解率仍可达到85％;可见光照射120 min后,1.4-BiOBr/BiOIO3对环丙沙星的降解率可达82.6％.以上实验结果可归结为BiOBr/BiOIO3异质结构在BiOBr和BiOIO3之间存在协同作用,异质结的形成拓宽了半导体的可见光吸收范围,阻止光生电子-空穴的复合.自由基捕获实验表明O2·-和h+是降解过程的主要活性物种.提出了BiOBr/BiOIO3材料光催化降解罗丹明B的可能机理,以期为设计和制备高效、绿色、稳定的光催化剂提供新的途径.
Author 徐成栋
胡浩
邵敏
万玉山
王安慰
AuthorAffiliation 常州大学环境科学与工程学院,江苏常州 213164
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SHAO Min
WAN Yushan
XU Chengdong
WANG Anwei
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Keywords 染料废水
光催化
纳米材料
异质结
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Title BiOBr/BiOIO3复合材料的合成及光催化性能研究
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