纳米二氧化钛光催化降解亮蓝染料的研究

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。

Photocatalytic degradation of remalzol brilliant blue dye by nanosized titania

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 TiO^₂ doses, and the optimum dose of nanosized TiO₂ was 1.0kg/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 12.62mmol/m³, nanosized TiO2 dose of 1.0kg/m³ and the irradiation time of 40min. The kinetics equation of the photocatalytic degradation reaction of RB was also deduced by the regression analyses.