以硝酸镉和硫代乙酰胺为原料,在不同的离子液体水溶液中采用超声法合成了不同形貌的硫化镉.采用XRD、SEM、BET、紫外-可见吸收光谱等手段对样品的结构和光学性能进行了考察,以罗丹明B为目标降解物考察了不同形貌硫化镉的光催化性能.结果表明,在不同的离子液体水溶液中可分别得到粒状、棒状和粒棒混合体.对比了纳米粒子、纳米棒和粒棒混合体对罗丹明B的降解率,结果表明,CdS纳米粒子具有更高的光催化效率,其粒状硫化镉比表面积为79.5 m2/g,远大于其它形状的硫化镉.在紫外光和可见光的照射下,反应120 min罗丹明B的降解率分别为97％和30％.离子液体的特殊结构是粒状硫化镉具有较高光催化活性的原因.
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