In order to study the photochemical activity of the product further , this dissertation , taking methyl orange as a deputy of organism , has studied the relation between the concentration of the organism and the reactive time during the process of light degradation , and , on the basis of the relation , the kinetic process of the photocatalytic degradation was achieved by the treatment on the curve of the organism concentration to the reactive time : zero order reaction of the high organism concentration , first order reaction of the middle organism concentration , second order reaction of the low organism concentration 在產(chǎn)品對有機物的光降解方面,本文主要以產(chǎn)品光降解甲基橙溶液為例,研究了光降解過程中,有機物濃度與時間的關系。并在此基礎上,對有機物濃度與時間的曲線進行了動力學處理,得出產(chǎn)品光降解甲基橙的動力學過程分為三步,摘要即:高濃度時的零級反應、中等濃度時的二級反應和低濃度時的一級反應。