三维电场协同TiO2光催化降解水中双酚A的研究

Degradation of Bisphenol A by TiO_2 Photocatalysis Assisted with Three-dimensional Electric Field

采用溶胶-凝胶法制备TiO2/Ti膜电极,设计了三维电极电助光催化降解反应装置,并将其用于降解水中的双酚A。结果表明,三维电场协同TiO2光催化氧化技术对双酚A的降解效果较好,反应120 m in后降解率可达100%;在本试验条件下,最佳阳极偏电压为8 V;当溶液的电导率较小时,增大电导率有利于对双酚A的降解,但当电导率较大时,对双酚A的降解率反而随电导率的增大而逐渐减小;电助光催化降解双酚A的反应符合表观一级动力学方程。

The TiO2/Ti film electrode was prepared by sol-gel method. A photocatalytic degrada- reactor assisted with three-dimensional electrode was designed and applied to degrade bisphenol A （BPA）. The results show that the degradation efficiency of BPA by TiO2 photocatalysis assisted with three-dimensional electric field is good, and the degradation rate of BPA reaches 100% after 120 min. The optimal anode bias is 8 V under this experimental condition. Increasing conductivity is beneficial for degradation of BPA when the conductivity is smaller, but the degradation rate of BPA decreases with the increasing of conductivity when the conductivity is larger. The degradation of BPA accords with apparent first order reaction.