• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Continuous flow synthesis of phase transition-resistant titania microparticles with tunable morphologies
【24h】

Continuous flow synthesis of phase transition-resistant titania microparticles with tunable morphologies

机译：具有可调谐形态的相变抗性二氧化钛微粒的连续流动合成

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

Titania microspheres have attracted substantial attention for a variety of applications, including ion scavenging, catalysis, and energy generation, though most synthetic techniques are limited to a few basic morphologies and narrow size ranges. Here, an intensified microfluidic strategy for continuous synthesis of anatase titania microspheres is presented. In-flow photo crosslinking, incorporated with a flow reactor and polar aprotic solvent, enables access to precursor compositions up to an order of magnitude higher than those previously reported, with size tunability approaching two orders of magnitude. Morphological and surface area effects associated with precursor composition are explored, resulting in hollow, yolk-shell, macroporous, and dense titania microspheres containing no detectable rutile phase and possessing surface areas exceeding 350 m(2) g(-1) post calcination. Furthermore, effects of calcination temperature and time on the surface area, crystallinity and phase composition, and morphology of the synthesized titania microspheres are studied in detail. The synthesized microspheres are shown to remain completely in the anatase phase, even at temperatures up to 900 degrees C, far beyond the expected phase transition temperature. Thus, the breadth of attainable morphologies, specific surface areas, and phase compositions present a variety of intriguing substrate candidates for such applications as heterogeneous (photo) catalysis, adsorption and ion capture, electrochemistry, and photovoltaics.
机译：Titania Microshes已经吸引了各种应用的大量关注，包括离子清除，催化和能量产生，尽管大多数合成技术仅限于少数基本形态和窄尺寸范围。这里，提出了一种抗锐钛矿二氧化钛微球的强化微流体策略。流动的照片交联与流动反应器和极性非质子溶剂掺入，使得前体组合物能够高于先前报告的数量级，尺寸可调性接近两个数量级。探索与前体组合物相关的形态学和表面积效应，导致含有无可检测的金红石相的中空，蛋黄 - 壳，大孔和致密的二氧化钛微球，并且具有超过350μm（-1）后煅烧的表面积。此外，详细研究了煅烧温度和时间对表面积，结晶度和相组合物的影响，结晶度和相组合物，以及合成的二氧化钛微球的形态。该合成的微球显示在锐钛矿相中，即使在高达900℃的温度下，远远超过预期相转变温度。因此，可达到的形态，比表面积和相组合物的宽度存在各种有趣的基底候选物，用于这种应用作为异质（照片）催化，吸附和离子捕获，电化学和光伏。

著录项

  • 来源
    《RSC Advances》 |2020年第14期|共8页
  • 作者

    Campbell Zachary S.; Jackson Daniel; Lustik Jacob; Al-Rashdi Amur K.; Bennett Jeffrey A.; Li Fanxing; Abolhasani Milad;

  • 作者单位

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

    North Carolina State Univ Dept Chem &

    Biomol Engn 911 Partners Way Raleigh NC 27695 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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