• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Highly photoactive porous anatase films obtained by deformation of 3D mesostructures
【24h】

Highly photoactive porous anatase films obtained by deformation of 3D mesostructures

机译：通过3D介观结构变形获得的高光活性多孔锐钛矿薄膜

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A transparent film of three-dimensional (3D) hexagonal (P63/mmc) mesostructured titania was fabricated according to a modified procedure using triblock copolymer Pluronic P123. The precursor solution was diluted with ethanol and spin-coated to afford a transparent film with a thickness of less than 100 nm. The mesostructure was maintained (deteriorated) at 400 °C, converted to regularly arranged anatase nanopillars with sufficient porosity at 550 °C, and deformed at 700 °C to nanocrystals with intercrystalline mesospaces. The mesostructural variation was related to the degree of shrinkage of the film owing to condensation and crystallization of the titania frameworks. An anatase nanocrystal film having sufficient porosity and high crystallinity was most active in the photodegradation of methylene blue. Such intercrystalline mesospaces can be controlled by regular deformation of 3D mesostructures through anatase nanopillar structures. In addition to adequate crystallinity of the titania frameworks, smooth diffusion of target organic molecules and/or degraded organic compounds was important for effective photodegradation.
机译：使用三嵌段共聚物Pluronic P123，根据改进的方法，制造了三维（3D）六方（P63 / mmc）介孔结构的二氧化钛透明膜。将前体溶液用乙醇稀释并旋涂以提供厚度小于100nm的透明膜。介观结构在400°C下保持（退化），转变为规则排列的锐钛矿纳米柱，在550°C时具有足够的孔隙率，并在700°C下变形为具有晶间介孔的纳米晶体。由于二氧化钛骨架的凝结和结晶，细观结构的变化与薄膜的收缩程度有关。具有足够的孔隙率和高结晶度的锐钛矿型纳米晶体膜在亚甲基蓝的光降解中最活跃。可以通过锐钛矿纳米柱结构通过3D介观结构的规则变形来控制这种晶间介观空间。除了二氧化钛骨架的足够结晶度外，目标有机分子和/或降解的有机化合物的顺畅扩散对于有效的光降解也很重要。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号