三乙胺掺杂TiO_2的常温制备及耐久性研究

ROOM TEMPERATURE PREPARATION AND DURABILITY STUDY OF TRIETHYLAMINE-DOPED TiO_2

以钛酸丁酯为前驱体,利用溶胶-凝胶法制备TiO2,室温下加入不同量的三乙胺,陈化后得到三乙胺改性的TiO2。用该溶胶浸渍提拉法在载玻片上涂膜,再用此TiO2薄膜在可见光下降解罗丹明B溶液,通过XRD、UV-vis等表征技术,发现此法制备得到的掺杂TiO2为锐钛矿型,具有一定的可见光响应能力,且经过多次重复使用后仍保持稳定的可见光催化活性。

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.