酸性铬蓝K染料敏化纳米TiO_2的实验研究

Experimental Study of Acid Chrome Blue K Sensitization to Nanometer TiO_2

为了提高二氧化钛(TiO2)在可见光下的催化性能,本文中采用酸性铬蓝K对纳米TiO2的敏化。然后通过TEM观察敏化后的TiO2的形貌,并在可见光下对甲基橙进行降解实验。实验结果表明,酸性铬蓝K可吸附在TiO2的表面,TiO2敏化后拓宽了的吸收光谱,在可见光范围有较大的吸收,并且发生了明显的红移现象。用不同的酸性铬蓝K时,20mg/L敏化的TiO2对甲基橙的降解效果最好。

In order to improve the catalytic performance of TiO2, the research focus on using acid chrome blue K sensitize nanometer TiO2. Then the morphology of sensitized TiO2 was observed and the sensitized TiO2 was used to degrade the helianthine under visible light. The results showed that the acid chrome blue K can adsorb on the surface of TiO2 and open up the absorption spectrum of TiO2, and making it have a larger adsorption in visible light extent, and occur obvious Einstein shift. The effect is the best when 20 mg/L of acid chrome blue K sensitized nanometer TiO2 degrade the lianthine.