采用水热法制备了不同晶相的纳米三氧化钨晶粒(WO 3),用 XRD、SEM对其晶体结构和表面形貌进行了分析,并采用分光光度计对其光催化性能进行了研究.重点研究了不同晶相的 WO 3纳米晶粒的光催化性能以及同一种晶相WO 3纳米晶粒对亚甲基蓝和甲基橙溶液光降解效果的差异.结果表明晶相不同的WO 3纳米晶粒对同一降解物的光降解效果有明显差异,而相同晶相的 WO 3纳米晶粒对亚甲基蓝和甲基橙的降解率以及降解速率也有显著差异,并对差异产生的机理和原因进行了分析.%Two kinds of WO3 nanoparticles with different crystalline phase were synthesized by the hydrothermal method.The microstructures and surface topography of the samples were investigated by XRD and SEM,re-spectively.Meanwhile,its photo catalytic performance to methyl orange(MO)and methylene blue(MB)was re-searched by using spectrophotometer.The research focused on the different photocatalytic performance showed by different crystalline phases WO3 with the same morphology.Also,the different photocatalytic properties of WO3 nanoparticles to MO and MB were studied.The results revealed that the different phase WO3 showed dif-ferent photocatalytic properties to the same wastewater clearly and the same phase WO3 showed the different degradation rate to the different wastewater.The reason and mechanism for the differences have been analyzed in this paper.
展开▼
