摘要
采用水热法制备ZnO纳米棒,将TiO2溶胶高速旋涂在ZnO纳米棒的表面,得到TiO2/ZnO复合半导体。通过扫描电子显微镜(SEM)、X射线衍射(XRD)及UV-Vis漫反射等研究样品的表面形貌、晶型结构及光学特性。结果表明:375℃高温焙烧后,TiO2生长成颗粒状,均匀负载在ZnO纳米棒的表面,样品对紫外-可见光的吸收增强。以甲基橙溶液为模拟废水在紫外光辐照下的降解率来评价样品的光催化性能,结果显示,两种半导体复合以后,对光的利用率提高,对甲基橙模拟废水的降解率高于单一半导体。
ZnO nanorod was prepared by the hydrothermal method,TiO2 sol was spin-coated on the ZnO nanorod to get TiO2/ZnO coupled semiconductors photocatalyst. The surface morphology ,crystal structures and optical properties of the sanples were characterized by SEM, XRD and UV-vis. The result showed that TiO2 growed into grain and uniform load- ed on the surface of the ZnO nanorods at 375℃, which enhanced the absorption ability of ultraviolet -visible light. The methyl orange solution was used as simulated wastewater. The photocatalytic activity of TiO2/ZnO under the ultraviolet light-irradiation was evaluated by the degradation rate of methyl orange solution. It was found that the efficiency of the light utilization was improved when the two semiconductors were combined, and the degradation rate of methyl orange solution was higher than using the single semiconductor.
出处
《化工新型材料》
CAS
CSCD
北大核心
2013年第7期75-77,共3页
New Chemical Materials
基金
国家自然科学基金(51162022)
关键词
水热法
TIO2
ZNO
模拟废水
光催化
hydrothermal method, Ti02/ZnO, simulated wastewater, photocatalysis
