表面活性剂对纳米TiO_2制备及其光催化活性的影响(Ⅰ)  

Effect of Surfactant on Preparation and Photoreactivity of Nanocrystalline TiO_2 (Ⅰ)

作　　者：蒋卫中[1] 范山湖[1] 湛社霞[1] 李玉光[1] 石宗炳 

机构地区：[1]中山大学化学与化学工程学院,广东广州510275 [2]广州市环境保护科学研究所,广东广州510300

出　　处：《中山大学学报（自然科学版）》2001年第2期58-61,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广州市环境保护局研究基金资助项目

摘　　要：用醇盐水解法制备了TiO2 光催化剂 ,以TG DTA、XRD、BET和SEM等方法研究了TiO2 光催化剂物理化学特性 ,考察了添加聚乙烯醇对催化剂粒度大小及其催化活性的影响 .结果表明 ,添加聚乙烯醇能显著降低团聚度 ,加入 φ =0 5%～ 1 0 %聚乙烯醇制备的样品平均颗粒尺寸约 50nm ,具有较高的光催化活性 .Titanium dioxide photocatalysts were prepared by hydrolysis of tatinium alkoxide Their physicochemical characters were studied by using TG\|DTA, XRD, BET and SEM,and their photocatalytic reactivity was also detemined with the degradation of phenol as a probe reaction The results indicated that the presence of surfactant PVA at the synthesis solution of TiO 2 reduced significantly its agglomeration, and resulted in homogeneous nanometer TiO 2 particles.In the case of addition of 0 5%～1% of PVA,the resultant TiO 2 particles were about 30 nm insize and exhibitted the best photoreactivity.

关 键 词：醇盐水解法 光催化剂 纳米二氧化钛 表面活性剂 制备 光催化活性 苯 聚乙烯醇 

分 类 号：TB383[一般工业技术—材料科学与工程] O643.36[理学—物理化学]