无机材料学报 ›› 2011, Vol. 26 ›› Issue (3): 305-310.DOI: 10.3724/SP.J.1077.2011.00305 CSTR: 32189.14.SP.J.1077.2011.00305

• 研究论文 • 上一篇    下一篇

TiO2 纳滤膜的制备及其离子截留性能

漆 虹, 李世大, 江晓骆, 韩静   

  1. 南京工业大学 膜科学技术研究所,材料化学工程国家重点实验室, 南京210009
  • 收稿日期:2010-05-13 修回日期:2010-08-04 出版日期:2011-03-20 网络出版日期:2011-02-18
  • 作者简介:漆 虹(1974-), 男, 博士, 副研究员.
  • 基金资助:

    国家自然科学基金青年基金(20906047);化学工程联合国家重点实验室开放基金 (SKL-ChE-09A01)

Preparation and Ions Retention Properties of TiO2 Nanofiltration Membranes

QI Hong, LI Shi-Da, JIANG Xiao-Luo, HAN Jing   

  1. Membrane Scienceand Technology Research Center, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
  • Received:2010-05-13 Revised:2010-08-04 Published:2011-03-20 Online:2011-02-18
  • Supported by:

    National Natural Science Foundation of China(20906047);Foundation of State Key Laboratory of Chemical Enginee-ring (SKL-ChE-09A01)

摘要: 以钛酸四异丙酯为前驱体,通过聚合溶胶路线制备出平均尺寸约1.2 nm的TiO2溶胶.采用浸浆法, 经过一次涂膜,在平均孔径约为3nm的片状 g -Al2O3/ a -Al2O3支撑体上制备出完整无缺陷的TiO2纳滤膜.详细考察了煅烧温度对非担载膜(TiO2粉末)和TiO2纳滤膜性能的影响.在350℃的煅烧温度下制备出孔径约为1.5nm的TiO2纳滤膜,该膜对PEG的截留分子量为890,纯水渗透通量为5.3 L/(m2 ? h)(8×105Pa,20℃); 并详细考察了该膜对NaCl、CaCl2、Na2SO4、MgCl2和Ni(NO3)25种溶液的截留性能.结果表明, 在pH=4,压力5×105Pa的条件下,Ti-350膜对0.025 mol/L CaCl2和MgCl2溶液的离子截留率分别达到96.5%和92.8 %.

关键词: 陶瓷纳滤膜, TiO2, 溶胶-凝胶法, 离子截留

Abstract: A stable TiO2 Solwith a mean particle size of 1.2 nm was synthesized with titanium is opropoxideas a precursor through polymeric Sol-Gel route. Diska -Al2O3 supported mesoporousg -Al2O3membrane with mean pore size of 3 nm was used as support for nanofiltration membranes deposition. Defect-free TiO2 nanofiltration membranessuper imposed on these supports were fabricated via dip-coating method followed by drying and calcination. The effect of calcination temperature on properties of unsupported TiO2membranes (powders) as well as supported TiO2 nanofiltration membranes was studied in detail. The MWCO, mean pore size and pure water fluxof TiO2 nanofiltration membrane calcined at 350℃were 890, 1.5 nm and 5.3 L/(m2·h)(at 8×105Pa,20℃), respectively. Ions retention properties of Ti-350 nanofiltration membrane towards five solutions like NaCl, CaCl2, Na2SO4,MgCl2 and Ni(NO3)2 were characterized. Under apH value of 4.0 and transmembrane pressure of 5.0×105Pa,the retention properties of Ti-350 membrane towards CaCl2 and MgCl2solutions reach maximum values of 96.5% and 92.8%, respectively.

Key words: ceramic nanofiltration membranes, titania, Sol-Gel method, ions retention

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