Ag3 VO4 ,a visible‐light‐driven photocatalyst ,was prepared by hydrothermal method with V2 O5 、NaOH and AgNO3 acted as materials .The effect of hydrothermal temperature on the visible light absorption and photocatalytic activity of Ag3 VO4 were systematically investiga‐ted .The visible light photocatalytic activity of Ag3 VO4 was evaluated by using organic dye methyl orange (MO) and rhodamine B (RhB) as evaluation system ,respectively .The results indicated that the obtained Ag3 VO4 photocatalyst at different hydrothermal temperature showed obvious absorbance in the visible light region and the absorption band edge centered at ca 590-650 nm .Moreover ,Ag3 VO4 obtained at 160 ℃ for 4 h exhibited the highest visible‐light‐driven activity .As Ag3 VO4 dosage being 0 .1 g ,the degradation yield of methyl orange with the concentration of 10 mg/L reached 94% after 3 h and while that of rhodamine B with the same concentration reached 98% after 1 h .%以V2 O5、NaO H和AgNO3为原料，采用水热法制备了可见光催化剂Ag3 VO4．考察了水热温度对该催化剂可见光吸收以及可见光催化性能的影响．以有机染料甲基橙（M O ）和罗丹明B （RhB ）为指标反应，测试了Ag3 VO4的可见光催化活性．结果表明，不同水热温度下的催化剂均在可见光区有明显的吸收，吸收带边约为590～650 nm ；在160℃水热反应4 h制得的Ag3 VO4光催化活性最高，当Ag3 VO4用量为01． g时，对于10 mg／L甲基橙溶液3 h的脱色率可达到94％，对10 m g／L罗丹明B 1 h的脱色率则可达到98％．
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