NING Haishui¹, DING Xingeng^1,2, SHEN Qianhong¹, GAO Jiwei^1,2, YA Hui^1,2

(1. College of Materials and Chemical Engineering, Zhejiang University, Hangzhou 310027; 2. Green Building Materials and Applied Technology Engineering Research Center, Zhejiang University, Hangzhou 310027)

Abstract: Triethylamine modified TiO₂ was synthesized at room temperature by doping different amounts of triethylamine as modification into the TiO₂ sols which were prepared through sol-gel method using tetrabutyl titanate as precursor. The TiO₂ films prepared by the dip-coating for thrice used the sols above. Then we used these TiO₂ films to decompose Rhodamine B solution under visible light. Characterization by XRD and UV-vis found that the TiO₂ modified by triethylamine was anatase crystalline and had visible photocatalytic activity; further more, after being used several times the TiO₂ still had a stable photocatalytic ability under visible light.

Key words: titanium, triethylamine, visible light activity, durability