荧光探针法快速评价光自洁材料的光催化性能

Assessment of photocatalytic activity of self-cleaning materials by fluorescence probe method

提出了一种以2-羟基对苯二甲酸为荧光探针快速评价光自洁材料自洁能力的新方法.通过与香豆素法和2,2′-联吡啶法进行对比,发现该法具有更高的灵敏度和更宽的pH适用范围;在优化的实验条件下,用此法评价几种实际光自洁材料的光催化活性,并和传统的甲基橙法进行比较,所得结果一致,但此法检测时间只需30 min,同时灵敏度提高了7 500倍.

A simple analysis method was established to evaluate rapidly the photocatalytic activity of self-cleaning materials that based on the determining the formation rate of 2-hydroxy terephthalic acid （TAOH） on a spectrofluorometer. Contrast with Coumarin method and 2, 2＇-Bipyridyl method, it was found that the TAOH fluorescence method was higher sensitivity and a broad range of pH. Under the optimal reaction conditions, the proposed TAOH fluorescence method was successfully applied to assessment photocatalytic ability of practical samples and the obtained results wereconsistent well with that tradition （methyl orange, MO degradation） method. Moreover, the TAOH fluorescence method has a sensitivity 7 500 times higher than the latter, and the examination time was only 30 min.