【摘要】 以Zn（NO₃）₂·6 H₂O、Ag NO₃和Na VO₃为原料,采用水热法合成Ag-Zn₃（VO₄）₂催化剂,并通过SEM、TEM和UV-Vis DRS等对催化剂进行表征分析。以甲基橙染料废水为探针污染物,考察Ag⁺与Zn²⁺物质的量比、水热温度和水热时间对Ag-Zn₃（VO₄）₂光催化剂催化活性和表面形貌的影响。结果表明,在Ag⁺与Zn²⁺物质的量比为0.15、水热温度160℃和水热时间16 h条件下,合成的Ag-Zn₃（VO₄）₂光催化剂光催化活性最好,光照5 h后,对甲基橙染料的脱色率达99.18%,较Zn₃（VO₄）₂催化剂（合成条件为p H=10和160℃水热反应16 h）提高43.99%。采用水热合成法制备的催化剂Ag-Zn₃（VO₄）₂具有较好的可见光活性。更多还原

【Abstract】 Using Zn（ NO₃）₂·6H₂O,Ag NO₃ and Na VO₃ as the raw materials,the visible-light photocatalyst Ag-Zn₃（ VO₄）₂was synthesized by hydrothermal process. The as-prepared photocatalysts were characterized by SEM,TEM and UV-Vis DRS. The influence of Ag⁺/ Zn^{2 +}molar ratios,hydrothermal synthetic temperatures and time on catalytic activity and surface morphology of Ag-Zn₃（ VO₄）₂photocatalysts was investigated by using methyl orange dye wastewater as probe pollutant. The results showed that Ag-Zn₃（ VO₄）₂photocatalyst possessed the best photocatalytic activity under the preparation condition of Ag⁺/ Zn^{2 +}molar ratio 0. 15,hydrothermal synthetic temperature 160 ℃ and hydrothermal synthetic time16 h. After visible light illumination for 5 h,methyl orange degradation rate over Ag-Zn₃（ VO₄）₂photocatalyst was 99. 18%,which was 43. 99% higher than that over Zn₃（ VO₄）₂catalyst prepared under the condition of p H = 10 and 160 ℃ hydrothermal reaction for 16 h. Ag-Zn₃（ VO₄）₂prepared by hydrothermal method exhibited excellent catalytic activity under visible light irradiation.更多还原