纳米二氧化钛光催化剂的涂料固载及光催化性能

以有机硅改性丙烯酸树脂为粘合剂，脂肪族聚异氰酸酯为交联剂，用制备涂料的方法固载纳米二氧化钛(TiO₂)光催化剂。在粘合剂质量分数为42%，交联剂质量分数为7%，且—OH 基与—NCO的摩尔比接近1，纳米TiO₂质量分数为5%的优化条件下，制得纳米TiO₂光催化涂料。测定了以该涂料制备的光催化反应器的使用性能。结果表明，该涂料性能稳定，对难降解的青霉素制药废水的催化降解效果优良，以该涂料固载的纳米TiO₂的光催化活性接近于分散态的纳米TiO₂。

Immobilization of a nano TiO2 photo-catalyst and photo-catalytic performance of the resulting coating

A photo-catalytic coating has been prepared by using silicone-modified acryl as adhesive and isocyanate as cross-linking agent in order to solve the problem of immobilization of nano TiO_2.The optimized conditions for preparation of the coating were found to involve a mass fraction of adhesive of 42%,a mass fraction of cross-linking agent of 7%,and mass fraction of P25 TiO_2 of 5%.When used in a custom-built photo-reactor,the resulting coating had an excellent photo-catalytic performance for degradation of wastewater from antibiotic production.The observed degradation effect was close to that of conventional dispersed nano TiO_2.