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以氯化镉和硫代乙酰胺为原料,六元瓜环(Q[6])为修饰剂,采用化学沉淀法制备了Q[6]-CdS复合光催化剂。利用Fourier变换红外光谱、X射线粉末衍射和扫描电子显微镜对样品的晶相结构和微观形貌进行表征,研究了修饰剂六元瓜环对样品结构和光催化性能的影响。结果表明:Q[6]-CdS复合光催化剂的光催化性能明显高于纯CdS,且催化稳定性好。在Q[6]用量为0.15 mmol时获得的微球状Q[6]-CdS对亚甲基蓝和结晶紫的光催化效果最好。50 mL浓度为28 mg/L的结晶紫溶液,在10 mg Q[6]-CdS的催化作用下反应200 min时,降解率达到93.5%;而50 mL浓度为6 mg/L的亚甲基蓝溶液,在10 mg Q[6]-CdS的催化作用下反应100 min时,降解率达到93.8%,光催化效率比CdS高出了64.8%。
The Q [6] -CdS composite photocatalyst was prepared by chemical precipitation method using CdCl2 and thioacetamide as raw materials and QTL (Q [6]) as modifier. Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the crystal structure and the morphology of the sample. The effect of the six-membered ring on the structure and photocatalytic activity of the sample was investigated. The results show that the photocatalytic activity of Q [6] -CdS composite photocatalyst is obviously higher than that of pure CdS, and its catalytic stability is good. Microspheres Q [6] -CdS obtained at Q [6] dosage of 0.15 mmol exhibited the best photocatalytic activity for methylene blue and crystal violet. The degradation rate was 93.5% when 50 mL of crystal violet solution with the concentration of 28 mg / L was reacted with 10 mg Q [6] -CdS for 200 min, while 50 mL methylene blue solution with the concentration of 6 mg / Under the catalysis of 10 mg Q [6] -CdS for 100 min, the degradation rate reached 93.8%, and the photocatalytic efficiency was 64.8% higher than CdS.