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。
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/m^3, nanosized TiO2 dose of 1.0 kg/m^3 and the irradiation time of 40 min. The kinetics equation of the photocatalytic degradation reaction of RB was also deduced by the regression analyses.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第4期33-36,共4页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金项目(50272008)
中国石油化工股份有限公司科学技术研究开发项目(X501019)
关键词
纳米二氧化钛
亮蓝染料
光催化
降解
nanosized titania
remalzol brilliant blue dye
photocatalysis
degradation
