采用水热法制备了掺杂型可见光催化剂Co-BiVO4,用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射(DRS)和低温氮吸附等表征手段对其结构性质进行了表征.结果显示,Co的掺杂没有改变BiVO4的晶相,在pH=7时制备的Co-BiVO4是单斜晶系白钨矿,晶型较完整.同时Co的掺杂延伸了BiVO4的可见光吸收范围,吸收边带明显红移,能隙禁带宽窄于纯BiVO4.低温氮吸附表明Co-BiVO4催化剂(pH=7)的孔半径主要分布在2,67 nm附近.在空气-有机溶剂体系中,研究了Co-BiVO4氧化脱除FCC汽油中特征硫化物噻吩的效果.实验结果表明,催化剂加入量为1.0 mg/L,空气通气量为150 mL/min,氙灯光照3.0 h,Co-BiVO4(pH=7,0)对模拟汽油的脱硫率可达到86％.
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