碳修饰钨酸铋光催化降解水体中的邻苯二甲酸酯

Photocatalytic degradation of phthalic acid esters in water by carbon modified bismuth tungstate

以Bi(NO3)3.5H2O、Na2WO4.2H2O为反应物,采用水热法,经由葡萄糖炭化合成了碳修饰Bi2WO6(C-Bi2WO6)催化剂;考察了C-Bi2WO6光催化降解3种邻苯二甲酸酯(PAEs)的催化性能.结果表明:C-Bi2WO6对PAEs的降解效果优于Bi2WO6,特别是在葡萄糖与Na2WO4.2H2O质量比约10∶100条件下得到的催化剂的催化性能最优.与此同时,当PAEs的pH=6时,降解效果最好;而PAEs的浓度也对PAEs的光催化降解有一定的影响.

Carbon modified Bi2WO6（C-Bi2WO6）catalyst was synthesized by hydrothermal carbonization of glucose（C6H12O6）in the presence of Bi（NO3）3.5H2O and Na2WO4.2H2O as raw materials.The catalytic performance of as-prepared C-Bi2WO6catalyst for the photocatalytic degradation of three kinds of phthalic acid esters（PAEs）in water was evaluated.Results show that C-Bi2WO6exhibits better photocatalytic performance than Bi2WO6;and in particular,CBi2WO6obtained under C6H12O6to Na2WO4.2H2O mass ratio of about 10∶100possesses the best photocatalytic activity towards PAEs degradation.In the meantime,the best degradation efficiency is obtained at a PAEs pH of 6,and the initial concentration of PAEs also has a certain degree of effect on the photocatalytic degradation of PAEs.