• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Novel preparation and photocatalytic activity of one-dimensional TiO_2 hollow structures
【24h】

Novel preparation and photocatalytic activity of one-dimensional TiO_2 hollow structures

机译：一维TiO_2空心结构的新型制备及其光催化活性

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

Usually, templated methods include two important steps: the coating of nanocrystals on the surface of the templates and the removal of the templates. In this study, one-dimensional TiO_2 hollow structures, based on the template-directed deposition and then in situ template-sacrificial reaction (or dissolution), were prepared by a one-step template method using vanadium oxide nanobelts as the templates and TiF_4 as the precursor at 60 deg C. The coating of TiO_2 nanoparticles on the surface of the templates was accompanied with the dissolution of vanadium oxide nanobelts by HF produced during the hydrolysis of TiF_4 in the reaction solution. It was found that the prepared one-dimensional TiO_2 hollow structures with a mesoporous wall were composed of TiO_2 nanoparticles with a diameter of 10-55 nm, resulting in a large specific surface area (77.2 m~2 g~(-1)) and high pore volume (0.13 cm~3 g~(-1)), and the wall thickness of the TiO_2 hollow structures could be easily controlled by adjusting the precursor concentration of TiF_4. The photocatalytic activity experiment indicated that the prepared one-dimensional TiO_2 hollow structures, which could be readily separated from a slurry system after photocatalytic reaction, exhibited obvious photocatalytic activity for the photocatalytic degradation of methyl orange aqueous solution.
机译：通常，模板化方法包括两个重要步骤：在模板表面上涂覆纳米晶体和去除模板。本研究以一氧化碳纳米带为模板，以TiF_4为模板，通过一步模板法制备了一维TiO_2空心结构，该结构是基于模板定向沉积，然后就地进行模板牺牲反应（或溶解）。在60℃时将其作为前体。模板表面上的TiO_2纳米颗粒涂层伴随着TiF_4水解过程中产生的HF溶解了氧化钒纳米带。结果表明，制备的具有介孔壁的一维TiO_2空心结构是由直径为10-55nm的TiO_2纳米颗粒组成的，具有较大的比表面积（77.2m〜2g〜（-1）），并且通过调节TiF_4的前驱体浓度，可以轻松地控制TiO_2中空结构的高孔隙体积（0.13 cm〜3 g〜（-1））和TiO_2中空结构的壁厚。光催化活性实验表明，所制备的一维TiO_2中空结构在光催化反应后很容易与浆液体系分离，对甲基橙水溶液的光催化降解表现出明显的光催化活性。

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