化学学报 ›› 2011, Vol. 69 ›› Issue (24): 2959-2963.DOI: 10.6023/A1105235 上一篇    下一篇

研究论文

锶掺杂纳米TiO2薄膜的制备及性能研究

丁士文*, 高甲, 丁宇   

  1. (河北大学化学与环境科学学院 保定 071002)
  • 收稿日期:2011-05-23 修回日期:2011-07-31 出版日期:2011-12-28 发布日期:2011-08-26
  • 通讯作者: 丁士文 E-mail:dingsw@mail.hbu.edu.cn
  • 基金资助:

    河北省自然科学基金

Preparation and Properties of Sr2+-doped Nano TiO2 Thin Film

DING Shi-Wen, GAO Jia, DING Yu   

  1. (College of Chemistry and Environmental Science, Hebei University, Baoding 071002)
  • Received:2011-05-23 Revised:2011-07-31 Online:2011-12-28 Published:2011-08-26

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.

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

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, NH3•H2O, Sr(OH)2•8H2O, 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.

Key words: colorless transparent hydrosol, nanometer titanium dioxide thin film, strontium doping, photocatalysis, super-hydrophilic