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(duì)有機(jī)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(guò)程中,有機(jī)物濃度與時(shí)間的關(guān)系。并在此基礎(chǔ)上,對(duì)有機(jī)物濃度與時(shí)間的曲線進(jìn)行了動(dòng)力學(xué)處理,得出產(chǎn)品光降解甲基橙的動(dòng)力學(xué)過(guò)程分為三步,摘要即:高濃度時(shí)的零級(jí)反應(yīng)、中等濃度時(shí)的二級(jí)反應(yīng)和低濃度時(shí)的一級(jí)反應(yīng)。