磷钨酸钾光催化降解百菌清农药的研究
A study of chlorothalonil photocatalytic degradation over potassium phosphotungstate
云南民族大学学报:自然科学版,2017,26(4):278-281

常玉 CY

摘要


以氯化钾、磷钨酸为原料,浸渍法制备非水溶性磷钨酸钾光催化剂.以有机农药百菌清为模型反应物,评价了磷钨酸钾的光催化活性,考察了百菌清降解率的影响因素.结果表明:磷钨酸钾光催化剂01g、百菌清质量浓度为5mg/L、光降解时间240min、溶液pH值5、功率100W紫外灯照射,百菌清的降解率达到86.22 %.催化剂重复使用4次后具有较高的催化活性及良好的稳定性,百菌清的降解率为60.40 %. Non-water soluble potassium phosphotungstate photocatalysts were prepared by the dipping method by using potassium chloride and phosphotungstate. With organic pesticides chlorothalonil as a model reaction, it evaluated the photocatalytic activities of phosphotungstic acid potassium and analyzed the factors affected by the chlorothalonil degradation rate. The results showed that the degradation rate of chlorothalonil on potassium phosphotungstate was increased to 86.22%, on the condition of 0.10g photocatalyst, 5mg/L chlorothalonil concentration, light irradiation time 240min, pH=5 and 100W mercury lamp. The catalyst was reused 4 times, and the degradation rate was 60.40%. It has higher catalytic activity and good stability, which is a potential photocatalyst in the field of pesticide degradation.

参考



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