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苏州科技大学科生毕业设计（论文）Ⅰ二氧化钛光催化降解有机污染物的性能研究摘要本文以钛酸四丁酯为钛源，采取水热法制备了二氧化钛纳米材料，用X射线衍射，电子扫描电镜等方法对合成的TiO2进行表征。实验研究了在模拟自然光条件下纳米二氧化钛降解亚甲基蓝的光催化行为，优化了实验条件如温度、二氧化钛光催化剂的用量对光催化降解的影响。实验结果表明，常温下，对于40mg/mL的亚甲基蓝溶液，加入10mg的TiO2，光催化降解40min，降解率可达到89％，但是在此基础上改变用量都会导致光催化降解率的降低。关键词：纳米二氧化钛水热法光催化降解亚甲基蓝苏州科技大学科生毕业设计（论文）ⅡPropertiesoforganicpollutantsPhotocatalyticDegradationABSTRACTInthispaper,titaniumdioxidewaspreparedbyhydrothermalmethodtopreparerutiletitaniumdioxidenanorodsbyusingfourbutyltitanateastitaniumsource.Onthebasisofthisstudy,thephotocatalyticdegradationofmethyleneblueunderinfraredlightisstudied.Andthroughtheadjustmentoftheexperimentalconditionssuchastemperature,pH,theamountofphotocatalyst,itwasconcludedthattherelativeoptimumconditionsofphotocatalyticdegradationofmethylenebluewereobtained.Inaddition,byX-raydiffraction,cyclicvoltammetryandscanningelectronmicroscope(SEM)methodofTiO2nanometersticksfromthephaseandmicrostructurewerecharacterized.Theexperimentalresultsshowthattheroomtemperatureandfor40mg/mLofmethylenebluesolution,addingmorethan1.0gofTiO2photocatalyticdegradationcatalystreaction20MINcanachieve89%ofthedegradationrate,butwiththeamountofcatalystincreaseanddecrease,thedegradationefficiencyofcatalystwillreduce,sothephotocatalyticdegradationshouldpayattentiontotheusageofcatalyst,shouldnotbetoomuch,alsoshouldnotbetoolittle.KeywordsRutileTitaniumDioxidehydrothermalPhotocatalyticDegradationofmethyleneblue苏州科技大学科生毕业设计（论文）Ⅲ目录一绪论.................................................................................................................................11.1前言........................................................................................................................11.2纳米TiO2催化剂合成...........................................................................................21.2.1气相法..........................................................................................................21.2.2液相法.........................................................................................................31.2.3水热法.........................................................................................................51.2.4纳米TiO2的微观结构................................................................................61.2.5光催化降解原理..................................................................................................71.3纳米TiO2在废水处理上的应用............................................................................81.3.1含油废水......................................................................................................81.3.2制药废水......................................................................................................91.3.3印染废水......................................................................................................91.3.4造纸废水......................................................................................................91.3.5表面活性剂废水..........................................................................................91.3.6垃圾渗滤液................................................................................................101.3.7重金属废水................................................................................................101.3.8无机非金属废水........................................................................................101.4本文的研究意义，目的以及内容......................................................................10第2章实验部分...............................................................................................................122.1实验药品与仪器...................................................................................................122.2TiO2的合成与制备...............................................................................................122.3TiO2光催化实验..................................................................................................132.3.1实验装置的搭建.......................................................................................132.3.2亚甲基蓝光催化降解实验........................................................................14第3章实验结果与讨论...................................................................................................163.1TiO2的结构表征...................................................................................................163.1.1X-射线衍射（XRD）...............................................................................163.1.2扫描电镜（SEM）....................................................................................163.2亚甲基蓝的标准曲线..........................................................................................173.2不同温度下亚甲基蓝的降解情况.......................................................................183.3不同催化剂浓度下亚甲基蓝的降解率...............................................................19苏州科技大学科生毕业设计（论文）Ⅳ3.4实验体会..............................................................................................................19结论...............................................................................................................................