在无和有S源(Na2S或硫脲)存在的条件下,采用十二胺辅助的醇-水热法制备了多孔单斜晶相结构的BiVO4-δ和不同含量S掺杂的BiVO4-δ催化剂.利用多种手段表征了催化材料的物化性质,评价了它们在可见光照射下催化降解亚甲基蓝或甲醛的反应活性.结果表明,所制光催化剂为单斜白钨矿晶相结构,具有多孔橄榄状形貌,比表面积为8.4-12.5 m2/g,带隙能为2.40-2.48eV.在S掺杂BiVO4-δ表面同时含有Bi5+,Bi4+,V5+和V4+物种.S掺杂对BiVO4-δ光催化剂的活性影响很大.在可见光下照射下,BiVO4-δS0.08光催化剂对亚甲基蓝和甲醛降解反应显示出最高的光催化活性,这与其较高的表面氧物种浓度和较低的带隙能相关.
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