摘要
采用溶胶-凝胶法制备的纳米TiO2光催化氧化SO2并考察了影响纳米TiO2光催化氧化SO2反应的影响因素,包括光强、反应温度、反应时间和SO2的初始浓度。结果显示:反应到一定时间后(大概1h),低浓度的SO2的光催化氧化效率都较稳定;对于较高浓度的SO2,其光催化氧化效率随着光辐照强度的增强而呈现出上升的趋势;在0～120℃的反应温度范围内,光催化氧化效率随着温度的升高而升高;SO2的初始浓度小于1090mg/m3时,光催化氧化效率随SO2初始浓度的增加而升高。
TiO2 nano-sized photocatalysts prepared by an acid-catalyzed sol-gel method photocatalyze SO2. Effects of reaction elements on photocatalytic oxidation were studied, such as radiation intensity, reaction temperature, reaction time and concentration of SO2. The research results showed that the efficiency of photocatalytic oxidation of SO2 was affected little by the radiation intensity when the initial concentration of SO2 was low. On the contrary, the efficiency increased with the increase of radiation intensity when the initial concentration of SO2 was high. In the range from 0℃ to 120℃, the efficiency of photocatalytic oxidation of SO2 increased with the increase of reaction temperature. When the initial concentration of SO2 was below 1090 mg/m^3, the efficiency of photocatalytic oxidation of SO2 increased with the increase of the initial concentration of SO2.
出处
《广东化工》
CAS
2006年第11期73-75,72,共4页
Guangdong Chemical Industry
关键词
纳米TIO2
光催化氧化
SO2
影响因素
nanometer titanium dioxide
photo catalytic oxidation
sulfur dioxide
affecting factors
