Ag-TiO2多孔薄膜及其非紫外光辐照下的超亲水特性

doi:10.3969/j.issn.0438-1157.2014.01.046

化工学报 ›› 2014, Vol. 65 ›› Issue (1): 352-357.DOI: 10.3969/j.issn.0438-1157.2014.01.046

• 材料化学工程与纳米技术 • 上一篇下一篇

Ag-TiO₂多孔薄膜及其非紫外光辐照下的超亲水特性

孙琳, 单国荣, 潘鹏举

化学工程联合国家重点实验室, 浙江大学化学工程与生物工程学系, 浙江杭州 310027

收稿日期:2013-06-05 修回日期:2013-07-08 出版日期:2014-01-05 发布日期:2014-01-05
通讯作者: 单国荣
作者简介:孙琳（1988-），女，硕士研究生。
基金资助:
化学工程联合国家重点实验室开放课题项目（SKL-ChE-12D06）。

Ag-TiO₂ porous thin film and its superhydrophilic properties under visible light

SUN Lin, SHAN Guorong, PAN Pengju

State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2013-06-05 Revised:2013-07-08 Online:2014-01-05 Published:2014-01-05
Supported by:
supported by State Key Laboratory of Chemical Engineering(SKL-ChE-12D06).

摘要/Abstract

摘要： 采用溶胶凝胶法，以钛酸丁酯为前驱体、硝酸银络合物为银源、聚乙二醇2000（PEG2000）作为结构导向剂，制备超亲水多孔Ag-TiO₂复合薄膜。用X射线衍射仪、X射线光电子能谱仪、扫描电镜、原子力显微镜表征薄膜晶相结构、化学成分以及表面形貌。根据静态水接触角、动态润湿时间、超亲水长效稳定性综合评价不同Ag含量及PEG2000添加量薄膜的超亲水性能。研究发现，掺杂Ag与PEG2000对薄膜在非紫外光下的超亲水特性具有协同作用，掺杂Ag明显提高薄膜动态润湿速度及可见光响应，表面粗糙多孔结构有利于避光条件下的长效超亲水特性。Ag含量10%、PEG2000掺杂量5%的Ag-TiO₂复合薄膜在自然光条件下已具备优良的超亲水性能；水滴0.2 s内即可在表面完全铺展到0°；避光条件下保存，超亲水时效性可达到30 d以上。在可见光活化下即可强化超亲水性能，具有良好的防雾效果。

关键词: Ag-TiO₂薄膜, 纳米粒子, 超亲水, 表面, 设计

Abstract: Superhydrophilic Ag-TiO₂ thin films were prepared by the sol-gel method using titanium-n-butoxide as TiO₂ precursor, silver nitrate as silver source, poly(ethylene glycol) (PEG2000) as structure directing agent. As-prepared composite thin films were characterized by X-ray diffraction, X-ray photoelectronic spectroscopy, scanning electron microscopy and atom force microscopy. The superhydrophilicity of Ag-TiO₂ thin films with different Ag and PEG2000 contents were evaluated in terms of static water contact angle, wetting time and long-term stability. Ag-doping significantly improved response to visible light and shortened wetting time, and porous surface with high roughness favored long-term superhydrophilicity. The Ag-TiO₂ thin films with 10% Ag doping and 5% PEG2000 content showed excellent superhydrophilic properties under natural light conditions. Water droplets could fully spread on the surface within 0.2 second with static water contact angle of 0°. Superhydrophilicity was maintained for more than 30 d when the thin films were stored in dark place. Superhydrophilic properties were enhanced when the films were irradiated under visible light. The composite Ag-TiO₂ thin films showed excellent anti-fogging effect.

Key words: Ag-TiO₂ films, nanoparticles, superhydrophilicity, surface, design

中图分类号:

TQ324.4

孙琳, 单国荣, 潘鹏举. Ag-TiO₂多孔薄膜及其非紫外光辐照下的超亲水特性[J]. 化工学报, 2014, 65(1): 352-357.

SUN Lin, SHAN Guorong, PAN Pengju. Ag-TiO₂ porous thin film and its superhydrophilic properties under visible light[J]. CIESC Journal, 2014, 65(1): 352-357.

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Ag-TiO₂多孔薄膜及其非紫外光辐照下的超亲水特性

Ag-TiO₂ porous thin film and its superhydrophilic properties under visible light

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