TiO_2-Ce(SO_4)_2光催化氧化体系荧光光度法测定染料浓度

Determination of Dye Concentration Using a Synergistic TiO_2-Ce(SO_4)_2 Photocatalytic Oxidation System

基于Ce(SO4)2可以捕获光生电子从而提高半导体光催化氧化能力的原理,建立了一种用纳米Ti O2-Ce(SO4)2协同体系光催化氧化,然后采用荧光光度法测定染料浓度的简便方法。以茜素红为模拟染料废水,对染料消解的最佳反应条件进行了考察。实验结果表明,p H值0.4,Ti O2用量1.0g/L,Ce(SO4)2初始浓度6.0mmol/L,溶液温度80℃,紫外光照时间12min为最佳的消解条件。

In the present paper, we establish the equivalent relation between the derivatives of a modified Bernstein operators and the smoothness of the functions which approximate in the weighted approximation, by using the weighted modulus of smoothness and the weighted K-functional.All the results involved have no re- striction on the upper bounds of the parameters a and b.