摘要
基于纳米TiO2光催化材料在紫外光照射下产生的羟自由基（·OH）能定量将碘离子氧化成单质碘,单质碘与淀粉显色后在605nm有很强的可见光吸收性能,建立了一种快速评价光催化材料性能的生色光度分析方法。与褪色光度法相比,该生色光度的方法具有更高的灵敏度和更快的检测速度。用该法对几种市场的光催化材料样品进行光催化性能测定,结果与传统的甲基橙法相比较具有较好的相关性。
Under ultraviolet radiation,the Nano-TiO2 photocatalytic products can produce hydroxyl（·OH）,which is a strong oxidation.It can oxidize I-to produce I2,which can form blue complex with water-soluble starch.Based on this,a new method was proposed for evaluating the photocatalytic activity of photocatalytic products.Compared with the traditional methyl orange degradation method,the proposed method characterized with higher sensitivity and speedy.The proposed method was successful applied to evaluate the photocatalytic activity of some photocatalytic products which bought from market,and the results were more consistent with traditional methyl orange degradation method.
基金
国家自然科学基金项目（20805016）
关键词
纳米光催化材料
光催化性能
光度法
碘
淀粉
photocatalytic activity
photocatalytic products
colormetic
iodin
starch
