锶掺杂纳米TiO_2薄膜的制备及性能研究  

Preparation and Properties of Sr^(2+)-doped Nano TiO_2 Thin Film

作　　者：丁士文[1] 高甲[1] 丁宇[1] 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《化学学报》2011年第24期2959-2963,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20806018);河北省自然科学基金(No.B2005000097)重点资助项目

摘　　要：以TiCl4,有机羧酸,NH3·H2O,Sr(OH)2·8H2O,D-山梨醇等为主要原料,首先采用常温络合-控制水解新技术制备出平均粒径为6 nm的锶掺杂纳米TiO2无色透明水溶胶,再利用普通喷涂技术制备了纳米薄膜.采用XRD,纳米激光粒度分析仪,AFM,EDS,紫外-可见分光光度计,光学接触角测试仪等对样品的物相、粒径、组成、光吸收、光催化及亲水性等性质进行了表征,同时对制备过程中的影响因素进行了研究.结果表明,当掺Sr量为1.8%,回流时间为60 min时,得到掺锶纳米TiO2水溶胶所制薄膜的光催化性能最好,在太阳光照射60 min后对浓度为50 mg/L的酸性红3R染料溶液的降解率达到99%,薄膜样品的接触角为0.91°,说明具有超亲水性.Sr2＋-doped nano TiO2 colorless and transparent hydrosol with an average particle size of 6 nm was synthesized by a novel complexation-controlled hydrolysis method at room temperature by using TiCl4,organic carboxylic acid,NH3oH2O,Sr（OH）2o8H2O,and D-sorbitol etc.as raw materials.Subsequently,the nanoscaled thin films were prepared by ordinary spraying technology.The phase structure,composition,particle size,absorbance spectrum,and contact angle of samples were characterized by XRD,nano laser particle size analyzer,AFM,EDS,ultraviolet-visible spectrophotometer,and optical contact angle tester,respectively.In addition,the influence of reaction conditions in the synthesis process was also studied.The nanoscaled thin films prepared by Sr2＋-doped nano TiO2 hydrosol exhibit optimal photocatalytic performance when the doping content of Sr2＋and refluxing time are 1.8% and 60 min,respectively.The degradation efficiency of acid red 3R dye solution with concentration 50 mg/L has reached 99% after exposed to sunlight for 60 min.Furthermore,the contact angle of the thin film sample is 0.91 degree,indicating the superhydrophilic property of the sample.

关 键 词：无色透明水溶胶 纳米二氧化钛薄膜 锶掺杂 光催化 超亲水性 

分 类 号：O614.411[理学—无机化学]