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La、Nd、Bi共掺杂制备TiO2电致变色薄膜及其性能研究
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安徽理工大学

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创新研究群体科学基金


Preparation and Property of La, Nd, Bi Co-doped TiO2 Electrochromic Film
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Educational Commission of Anhui Province of China ” (KJ2017ZD08)

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    摘要:

    为了提高TiO2薄膜的光学属性和着色效率,采用溶胶–凝胶工艺,以钛酸丁酯为前驱体在ITO导电玻璃基片表面制备了La、Nd、Bi共掺杂TiO2薄膜。采用TG-DTA、XRD、UV-Vis、电化学工作站等手段研究分析了TiO2粉末和薄膜的结构和表面形貌的光学和电致变色性能。结果表明:在400℃、500℃和600℃热处理的二氧化钛干凝胶中形成锐钛矿型二氧化钛,且热处理温度越高,晶体发育越完整。La、Nd、Bi掺杂TiO2增加了TiO2八面体的排列无序性,导致非晶化程度提高,体积分数为12%的钛酸丁酯对应制备的薄膜具有优良的电致变色性能。500℃热处理的TiO2薄膜电致变色性能最为优异。实验进行了La、Nd、Bi单独掺杂TiO2薄膜的性能分析, 按照摩尔掺杂量8%La、18%Nd、6%Bi的TiO2薄膜具有较优异的变色性能, 单独掺杂变色效果: 6% Bi﹤8% La﹤18% Nd。La、Nd、Bi共掺杂TiO2锐钛矿仍然具有很高的非晶化程度, 且当摩尔掺杂量比La:Nd:Bi=4:10:2时, 取得薄膜最佳循环伏安特性, 掺杂TiO2非晶相程度最高。

    Abstract:

    To improve optical property and coloration effect, La, Nd and Bi co-doped TiO2 films were synthesized via a Sol-Gel method, by using butyl titanate as precursor on the surface of ITO glass substrate. Structural surface morphologies and electrochromic properties of the as-prepared films were examined with TG-DTA、XRD、UV-vis and Electrochemical workstation. The results showed that anatase TiO2 formed from TiO2 dry gels after heat treatment at 400℃, 500℃, 600℃, and showing tendency of the higher the temperature heat treatment, the more complete the crystal development. La, Nd and Bi doped TiO2 increased the disorder of the TiO2 octahedron, resulting in increase of the amorphized degree. TiO2 films prepared with acurate 12% tetrabutyl titanate exhibited the best electrochemic properties. TiO2 films heat-treated at 500℃ showed excellent electrochemical properties. TiO2 films separately doped with molar amount fraction of 8%La, 18%Nd, 6%Bi, possess excellent electrochemic properties,and single doping effect is in the order of 6% Bi < 8 %La<18% Nd. La-Nd-Bi co-doped TiO2 is anatase with a very high amorphized degree, with the best cyclic valtammentry and highest amorphized degree when the molar amount ratio of La:Nd:Bi=4:10:2.

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徐子芳,JIANG Yujie, GUI Chan, MA Jun. La、Nd、Bi共掺杂制备TiO2电致变色薄膜及其性能研究[J].稀有金属材料与工程,2021,50(2):451~457.[XU ZiFang, JIANG Yujie, GUI Chan, MA Jun. Preparation and Property of La, Nd, Bi Co-doped TiO2 Electrochromic Film[J]. Rare Metal Materials and Engineering,2021,50(2):451~457.]
DOI:10.12442/j. issn.1002-185X.20200004

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  • 收稿日期:2020-01-03
  • 最后修改日期:2020-04-17
  • 录用日期:2020-04-26
  • 在线发布日期: 2021-03-09
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