CAJ | 학술논문

以SnCl4和Ti(OBu)4为原料，采用活性层包覆法制备了SnO2@TiO2包覆型复合光催化剂，并用XPS、IR、XRD、TEM和BET等手段进行了表征，以二甲基二氯乙烯基磷酸酯（简称DDVP）稀释液为模拟废水，考察了SnO2@TiO2的光催化活性及降解液初始浓度对反应动力学的影响.结果表明：包覆粒子由锐钛矿型TiO2和金红石型SnO2组成；与纯SnO2、TiO2相比，SnO2@TiO2包覆粒子的光催化活性明显提高，DDVP稀释液被光催化降解属于零级反应，但反应表观速率常数与降解液初始浓度成正比.
이SnCl4화Ti(OBu)4위원료，채용활성층포복법제비료SnO2@TiO2포복형복합광최화제，병용XPS、IR、XRD、TEM화BET등수단진행료표정，이이갑기이록을희기린산지（간칭DDVP）희석액위모의폐수，고찰료SnO2@TiO2적광최화활성급강해액초시농도대반응동역학적영향.결과표명：포복입자유예태광형TiO2화금홍석형SnO2조성；여순SnO2、TiO2상비，SnO2@TiO2포복입자적광최화활성명현제고，DDVP희석액피광최화강해속우령급반응，단반응표관속솔상수여강해액초시농도성정비.
SnO2@TiO2 coated particles have been prepared with Ti(OC4H9)4 andSnO2· nH2O as precursors by coated on active surface.In order to improve the photocatalytic degradation activity of SnO2@TiO2 for DDVP,the conditions of preparation were studied and better photocatalytic activity was obtained.Its morphology and structure were characterized by XRD,SEM,TEM,XPS、 IR and BET.The result indicated:That SnO2@TiO2 is composed of nanometer ranatase TiO2 and rutile SnO2,and the photocatalytic activities of SnO2@TiO2 are better than those of SnO2 and TiO2,the apparent rate constant k of the photocatalytic degradation of DDVP is related to the initial concentration of DDVP solution.The reaction is not a simple zero-order reaction.