为了探索有机物 4 -( 2 -吡啶偶氮 )间苯二酚 ( PAR) ,在固定光催化剂上的降解行为 ,采用溶胶—凝胶法 ,在玻璃表面制得均匀透明的纳米 Ti O2 薄膜 ,并以其作光催化剂 ,在 2 54nm紫外光照射下 ,进行 PAR水溶液的光催化降解研究。研究了 PAR光催化降解率与溶液 p H值、PAR初始浓度、助催化剂 ( H2 O2 )浓度和不同光照条件的变化关系 ,得出了 Ti O2 薄膜的光催化降解 PAR的有利条件 In order to explore the degradation behavior of 4 - (2 - pyridylazo) resorcinol (PAR) on immobilized photocatalyst, a uniform and transparent nano - Ti O2 thin film was prepared on the surface of glass by sol - gel method. With its photocatalyst, under the irradiation of 254nm UV light, the photocatalytic degradation of PAR aqueous solution was studied. The relationship between PAR photocatalytic degradation rate and p H value, initial concentration of PAR, concentration of H2O2 and illumination conditions was studied. The favorable conditions of photocatalytic degradation of PAR for Ti O2 thin film were obtained