用涂膜 法制备 了具有多 孔微结构 的二 氧化 钛薄 膜电 极． 以制 得的 电极 为工 作电 极， 建立了三电 极的电 助光催化 体系． 选择含 氯苯酚（４氯苯 酚， ２ ， ４ ， ６三氯 苯酚） 作 为降 解对 象，进 行光催化研 究． 实 验结果 表明： 外加电极 偏压可 抑制光生 电子空穴 的复 合，提 高二 氧化 钛的 光催 化效率； 光强越强 ，降解速 度越快 Titania thin film electrode with porous microstructure was prepared by coating method. Using the prepared electrode as the working electrode, a three-electrode electro-optical photocatalytic system was established. Chlorophenols (4-chlorophenol, 2,4,6-trichlorophenol) were selected as degradation targets for photocatalytic studies. The experimental results show that the applied electrode bias can inhibit the recombination of photogenerated electron-hole and improve the photocatalytic efficiency of TiO2. The stronger the light intensity, the faster the degradation rate