【摘要】 采用溶胶-凝胶法制备了Gd3+掺杂TiO2光催化剂,利用紫外-可见漫反射光谱对样品进行了表征.考察了纯TiO2和Gd3+掺杂TiO2对碱性品红染料降解性能的影响.结果发现Gd3+的掺入抑制了TiO2由锐钛矿相向金红石相的转变,与纯TiO2相比,Gd3+掺杂TiO2催化剂在可见光区的吸收能力增强,该催化剂光催化降解碱性品红的活性提高了20%左右.实验表明,掺杂Gd3+1%(质量分数),温度为25℃,底物浓度为20 mg.L-1时对碱性品红染料降解的效果较好.更多还原

【Abstract】 Gd3+-doped with TiO2 photocatalysts was prepared by sol-gel process,and characterized by means of uv-vis diffuse reflectance spectra.The degradation effects of Gd3+ doped with TiO2 on basic fuchsin dyes and that of pure TiO2 were investigated.The results show that TiO2 transformation from anatase phase to rutile phase was inhibited by doping Gd3+.The Gd3+-doping TiO2 absorptive capacity in visible region was promoted compared with pure TiO2.The activity of degradation of basic fuchsin increased by about 20%.The experimental results show that the effect of basic fuchsin dye degradation is better under these conditions with 1% Gd3+ doped(mass ratio),the temperature 25 ℃,and the substrate concentration 20 mg·L-1.更多还原