CAJ | 학술논문

采用循环伏安法和紫外光谱法对有机物的光催化降解进行机理研究和在线监测.以标准光催化剂DegussaP25在紫外光照射下催化降解4-氯苯酚，发现在降解过程中至少有两对氧化还原中间产物:对苯二酚-苯醌和羟基氢醌-羟基苯醌.由4-氯苯酚及中间产物的电极响应，可以观测到它们在光催化降解过程中的含量变化，从而对整个过程实现在线监测，并由此全面了解光催化反应机理.从不同反应时间后测得的紫外光谱可以看到，苯环特征峰逐渐消失.这表明4-氯苯酚的苯环逐渐被打开，直至被彻底降解.
채용순배복안법화자외광보법대유궤물적광최화강해진행궤리연구화재선감측.이표준광최화제DegussaP25재자외광조사하최화강해4-록분분，발현재강해과정중지소유량대양화환원중간산물:대분이분-분곤화간기경곤-간기분곤.유4-록분분급중간산물적전겁향응，가이관측도타문재광최화강해과정중적함량변화，종이대정개과정실현재선감측，병유차전면료해광최화반응궤리.종불동반응시간후측득적자외광보가이간도，분배특정봉축점소실.저표명4-록분분적분배축점피타개，직지피철저강해.
On-line monitoring in photocatalytic degradation process oforganic compound 4-chlorophenol (4-CP) w as carrie d out by using cyclic voltammetry and UV-Vis spectrometry. The result showed th at the degradation process undertook at least a two-route mechanism to the comp lete mineralization: through redox pairs of benzoquinone(BQ) and hydrobenzoquinone(HQ ) and of hydroxybenzoquinone(HBQ) and hydroxyhydrobenzoquinone(HHQ). UV-Vis spe ctra taken at different time showed the breakage of benzene ring and the complet e mineralization. The electroanalysis was proved to be a proper technique for on -line monitoring as it could detect simultaneously both initial reactants and intermed iates, and thus it is suitable for on-line monitoring and complementary for mec hanism study.