TiO_2纳米微粉及生物染料的光催化降解

Nanoparticles TiO_2 and the photo-catalyst degradations of the biological dyes

基于过氧络合热分解法制备了平均粒径为6～7nm的TiO2微粒,并研究了对生物染料亚甲蓝、孔雀绿溶液的光催化降解作用。亚甲蓝溶液的紫外可见光谱的吸收峰(峰位波长663～646nm以及292～288nm)的吸光度随光催化时间的加长而明显减弱。孔雀绿溶液的紫外可见光谱的吸收峰(峰位波长617～612nm)的吸光度随光催化时间的加长也减弱。但是位于紫外光区256nm左右的吸收峰的吸光度却大幅度增强。

Based on the method of peroxidecomplex heat decomposition, the nanoparticles of TiO2 with particle size of 6～7nm were prepared. The photo-catalyst degradations of the biological dyes solution of methylene blue and the C48H50N4O4·2H2C2O4 were also investigated. The absorbance of the absorption peak (663～646nm and 292～288nm) of the ultravioletvisible spectra for methylene blue solution decreases evidently with increasing of the photocatalyst time. However, for the solution C48H50N4O4·2H2C2O4, with increasing photocatalyst time, the absorbance of the peak 617～612nm in visible range of the ultravioletvisible spectra decreases, but increases greatly for the absorption peak 256nm in ultraviolet range. 