一种高活性的CdS纳米颗粒的制备及其光催化活性研究

在室温下,以正丁胺为模板剂,通过简单的化学方法合成了直径约为10nm的CdS纳米颗粒,并研究了光催化剂用量,H2O2用量,试液的pH值,紫外光照时间与甲基橙色率的关系。实验结果表明,在最佳光催化剂用量为0.3g,最佳H2O2用量为0.4mL,最佳pH值为1时,紫外光照仅需30s,太阳光照射也只要1min,脱色率可达99%以上。与前人研究的结果比较,无论是在研究紫外光,还是研究太阳光光催化方面都有了进步。甲基橙脱色率很好,有些用于工业化用途。

Study on the Synthesis of CdS Nanoparticles with High Photocatalytic Activity

CdS nanoparticles(r≈10 nm) were synthised by a simple chemical method under room temperature.The photocatalytic oxidation properties were examined by the degeneration of methyl orange.The effect of the amount of catalyst,amount of H_2O_2 and pH was studied,The result showed that the optimal experimental conditions were: pH=1,V_H_2O_2=0.4 mL,m_CdS=0.3 g.Under these conditions,the decoloring rate of methyl orange was more than 99% in 30 s for ultraviolet light and in 1 min for sunlight,which was greatly improved as compared with the results of other studies on photocatalytic activity for UV light or sunlight.The material could be industrialized.