以AgNO3、Na2CrO4为原料,采用化学沉淀法成功制备出了鹅卵石结构的Ag2CrO4纳米晶.采用X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见光谱仪等分别对所得产物的物相、形貌及光学性能进行表征,研究了不同pH对Ag2CrO4纳米晶的结构及可见光催化性能的影响.结果表明:在反应体系pH为3～6范围内,均可以制备出纯相的鹅卵石结构的Ag2CrO4纳米晶;pH =3时所得产物在可见光照射下,对罗丹明B(RhB)的催化降解效果最好,光照140 min后降解率可达到93％.
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