以NH4VO3和AgNO3为原料,采用液相直接沉淀法制备了Ag3VO4粉体,用XRD、SEM、BET和UV-Vis等手段对样品的物相、形貌、比表面积和光学特性进行了表征；以可见光为光源、罗丹明B为目标降解物考察了Ag3VO4的光催化活性.结果表明,反应混合物的pH值对样品的成分有重要的影响,在调节反应混合物的pH值为7时,所制备的样品为单斜相的Ag3VO4；反应时间、反应温度和表面活性剂等对Ag3VO4的尺寸和形貌有较大的影响.UV-Vis分析表明,所得样品在400～680nm有强而宽的吸收,其能带间隙Eg为1.90eV；光催化性能测试表明,样品的可见光光催化活性较高,在35W氙灯照射下,经100min降解,80℃反应8h所得样品对罗丹明B的降解率可达97.7％.
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