采用柠檬酸络合法分别合成了B掺杂及B-Er共掺杂BiVO4可见光光催化剂,并对材料进行了XRD、SEM、EDS、BET和UV-vis等表征和分析.以光催化降解甲基橙溶液为探针反应,考察掺杂对BiVO4可见光催化活性的影响.结果表明:掺杂没有改变BiVO4晶型,掺杂前后均为单斜型,但B-Er共掺杂BiVO4的晶体粒径较单掺杂B和纯BiVO4减小.由UV-vis知,B-Er共掺杂BiVO4的光吸收强度大于单掺杂和纯BiVO4,光谱吸收红移程度大于单掺杂.B和Er共掺杂纳米BiVO4光催化剂产生协同效应,其光催化性能优于单掺杂B.当固定B为4％掺杂时,Er掺杂量为1％制备的B-Er共掺杂BiVO4,60 min对甲基橙的降解率达96.62％,较单掺杂B(37％)和纯样(20％)有明显提高.
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