氧化亚铜的复合改性及其光催化性质研究

采用简单的室温液相还原法制备了氧化亚铜微米立方块和Cu2O-ZnO复合物,利用XRD和EFSEM对产物进行了表征,研究了太阳光照下合成产物对不同类型染料的光催化降解性能。结果表明,氧化亚铜对阴离子染料有较好的降解效果,对阳离子染料降解效果不明显;Cu2O-ZnO复合物对阳离子染料亚甲基蓝的光催化活性明显高于纯的氧化亚铜,其中10%Cu2O-ZnO复合物的光催化效果最好。通过荧光光谱分析了复合物增强对阳离子染料亚甲基蓝的光催化效率的原因,探讨了Cu2O-ZnO复合物光催化反应的机理。

MODIFICATION OF CUPROUS OXIDE AND ITS ENHANCED PHOTOCATALYTIC ACTIVITIES

Cuprous oxide(Cu2O) microcubes and Cu2O-ZnO composites have been successfully fabricated by solution-phase reducing method at room temperature.The samples were characterized by X-ray powder diffractometer(XRD),field emission scanning electron microscopy(FESEM).The decoloration rate of dyes for the as-synthesized Cu2O microcubes as photocatalyst were examined at different conditions.The results showed that the decoloration rate of anion dyes were higher and that of cation dyes were lower.The photocatalytic activities of the as-synthesized Cu2O-ZnO composites were studied by monitoring the degradation of cation dyes(methylene blue) solution.It was found that photocatalytic activities of the as-synthesized Cu2O-ZnO composites were more superior than Cu2O microcubes.The decoloration rate of methylene blue was reached 61.8% for 10% Cu2O-ZnO.Moreover,the photoluminescence properties of the products were investigated.The photocatalytic degradation mechanism for the compodite as photocatalyst was proposed.