CuO掺杂TiO_2光催化降解孔雀石绿的性能研究  

The Study of Photocatalysis Degradation of Malachite-Green over TiO_2 doped with CuO

作　　者：黄雅丽[1] 

机构地区：[1]闽江学院化学与化学工程系,福建福州350108

出　　处：《化学工程与装备》2016年第12期37-41,共5页Chemical Engineering & Equipment

基　　金：福建省教育厅科技项目(编号:JAT160392;JA15435);闽江学院科研项目(编号:MYK16005)

摘　　要：采用超声振荡法制备CuO掺杂TiO_2光催化剂,并用分光光度法研究了其在紫外灯下光催化降解孔雀石绿溶液的性能。主要考察了CuO的掺杂比例、催化剂的烧结温度、孔雀石绿溶液的初始浓度、催化剂的投加量等因素对光催化降解孔雀石绿效果的影响。实验结果表明:CuO的最佳掺杂比例为1.2wt.%;催化剂的最佳煅烧温度为600℃;孔雀石绿溶液的最佳初始浓度为8 mg/L;催化剂的最佳用量为0.40g/L。紫外-可见吸收光谱图显示,孔雀石绿分子中的发色基团及其他基团被破坏,发生脱色降解。催化剂的XRD表征结果说明,CuO掺杂后没有改变TiO_2的晶型结构,但其结晶度有所提高,颗粒变小,相对比表面积增大,有利于改善光催化性能。TiO_2 doped with CuO photocatalysts were prepared by using ultrasonic osilla method. The photocatalytic degradation of Malachite green on CuO/TiO_2 under the illumination of UV lamp was studied through spectrophotometry. The factors having influence on the photocatalytic degradation of Malachite green such as the doping ratio of CuO, the sintering temperature of the catalyst, the initial concentration of Malachite green and the dosage of catalysts were investigated. The result of the experiments showed that best CuO doping ratio was 1.2%wt., the best sintering temperature of catalysts was 600℃, the best initial concentration of Malachite green was 8mg/L and the best catalyst dosage was 0.4g/L. It was revealed in the UV-Vis spectrum that the chromophore and other groups of Malachite green molecule were damaged,then the decolorization and the degradation occurred. The XRD characterization result suggested that the crystalline of TiO_2 doped with CuO did not change,but the crystallinity increased, the particle size decreased, specific surface area increased, all these might improve the photocatalytic property.

关 键 词：TIO2 CUO 掺杂 孔雀石绿 光催化降解 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]