摘要
采用水热合成法制备新型可见光催化剂SnxZn(1-x)WO4,以甲基橙染料废水为探针污染物,考察Zn2+与Sn2+物质的量比、水热温度和水热时间对SnxZn(1-x)WO4光催化剂的催化活性、表面形貌和比表面积的影响。结果表明,在Zn2+与Sn2+物质的量比为0.25、水热温度100℃和水热时间12 h条件下,合成的Sn0.8Zn0.2WO4催化剂活性最好,光照30 min后,对甲基橙染料的脱色率达98.62%,较Sn WO4催化剂(合成条件为原始p H值,160℃水热反应24 h)提高46.66%。采用水热合成法制备的催化剂SnxZn(1-x)WO4具有良好的可见光活性。
The novel visible-light photocatalysts SnxZn（ 1-x）WO4was synthesized by hydrothermal method.The influence of Zn2 ＋/ Sn2 ＋molar ratio,hydrothermal synthetic temperature and time on photocatalytic activitiy of SnxZn（ 1-x）WO4catalysts was investigated by using methyl orange dye wastewater as probe pollutant. The as-prepared SnxZn（ 1-x）WO4catalysts were characterized by SEM and BET. The results showed that Sn0. 8Zn0. 2WO4 photocatalyst possessed the best photocatalytic activity under the preparation condition of Zn2 ＋/ Sn2 ＋molar ratio 0. 25,hydrothomal reaction temperature 100 ℃ and hydrothomal reaction time 12 h. After visible-light illumination for 30 min,methyl orange degradation rate over Sn0. 8Zn0. 2WO4 photocatalyst was 98. 62%,which was 46. 66% higher than that over Sn WO4 prepared under the condition of original p H and 160 ℃ hydrothermal reaction for 24 h. Therefore,SnxZn（ 1-x）WO4synthesized by hydrothermal method exhibited excellent photocatalytic activity under visible light irradiation.
出处
《工业催化》
CAS
2014年第12期949-952,共4页
Industrial Catalysis
