【摘要】 以纳米TiO2为光催化剂,高压汞灯为紫外光源,研究了水溶液中亮蓝染料的半导体光催化降解及其影响因素。研究结果表明,TiO2在500℃煅烧后所形成的锐钛型产物具有较好的光催化效果。纳米TiO2的用量是影响亮蓝降解反应速率的重要因素,其最适宜的用量为1.0kg/m3。亮蓝的初始浓度越高,降解率越低。在亮蓝初始浓度为12.62mmol/m3,纳米TiO2的用量为1.0kg/m3时,经光照40min后亮蓝的降解率可达99%以上,并通过回归分析得出了亮蓝降解的动力学方程。更多还原

【Abstract】 The photocatalytic degradation of remalzol brilliant blue （RB） dye in an aqueous solution was investigated by employing nanosized TiO₂ as the photocatalyst and a high pressure mercury lamp as the ultraviolet light source. The experimental results indicated that the anatase TiO₂ formed via calcinating at 500 ℃ had a better photocatalysis effect. The prominent factor affecting the RB degradation reaction rate was nanosized TiO₂ doses, and the optimum dose of nanosized TiO₂ was 1.0 kg/m3. The degradation percentage of RB decreased with an increase in the initial concentration of RB. The degradation percentage of RB could exceed 99% under the reaction conditions of the initial RB concentration of 12.62 mmol/m3, nanosized TiO₂ dose of 1.0 kg/m3 and the irradiation time of 40 min. The kinetics equation of the photocatalytic degradation reaction of RB was also deduced by the regression analyses.更多还原