【摘要】 研究了NO2的自光解、光强、污染物起始质量浓度和反应环境温、湿度等因素对TiO2的光催化氧化效果,结果表明,NO2的自光解伴随着TiO2光催化氧化而同时发生,其转化率明显小于TiO2光催化氧化率。在同等条件下TiO2光催化氧化率随光强的增强而增加,随污染物起始质量浓度的增大而减小。环境温、湿度对TiO2光催化氧化影响较为复杂,在一定条件下,温度具有最佳使用范围,而湿度环境既可促进TiO2光催化氧化率,同时也可抑制其转化率。更多还原

【Abstract】 Effects of NO₂ self-photolysis, radiation intensity, initial concentration of pollutant, reaction temperature, and humidity on TiO₂ photocatalytic oxidation were studied. Result showed that NO₂ self-photolysis is simultaneous with TiO₂ photocatalytic oxidation, and the efficiency of NO₂ self-photolysis is distinctly lower than TiO₂ photocatalytic oxidation rate. TiO₂ photocatalytic oxidation rate increases with increasing radiation intensity and decreases with increasing initial concentration of pollutant under the same conditions. Temperature has an optimal range, and humidity can improve or inhibit TiO₂ photocatalytic oxidation rate under certain conditions.更多还原