磷钨酸光催化降解甲基橙溶液的研究

以磷钨酸为光催化剂,在紫外灯照射下,对模拟染料废水甲基橙溶液进行光催化降解,并研究了催化剂加入量、pH值、甲基橙初始浓度和外加氧化剂H2O2对光催化降解效果的影响.结果表明,磷钨酸光催化剂加入量为300 mg/100 mL,pH=2.5时,甲基橙溶液的降解率明显高于其他pH值的降解率;在较低浓度下,甲基橙溶液的光催化降解反应符合一级动力学方程;外加氧化剂H2O2可提高光催化反应速率.

Photocatalytic degradation of methyl orange solution with phosphotungstic acid

The phosphotungstic acid was used to degrade the methyl orange solution with ultraviolet radiation.The effects of catalyst quantity,pH,the initial concentration of the methyl orange and H_2O_2 added on decoloration efficiency of the solution were investigated.When pH is 2.5,the quantity of the phosphotungstic acid is 300 mg/100 mL,the degradation rate of the methyl orange solution is highest.The photocatalytic degradation of the methyl orange is a first order kinetic equation at lower initial concentration.In the system,H_2O_2 added can enhance the decoloration efficiency of the methyl orange solution.