• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Determination of the ion exchange process of K2Ti4O9 fibers at constant pH and modeling with statistical rate theory
【24h】

Determination of the ion exchange process of K2Ti4O9 fibers at constant pH and modeling with statistical rate theory

机译：固定pH下K2Ti4O9纤维离子交换过程的确定及统计速率理论的建模。

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

The ion exchange kinetics of K2Ti4O9 fibers at constant pH was determined precisely by ion-selective electrodes, and activity coefficients of ions in solutions were calculated by the Lu-Maurer equation. It was found that the equilibrium time and TiO2/K2O molar ratio in the solid phase are more sensitive to pH than to water volume. After that, a two-step exchange kinetics model was developed, in which a statistical rate theory base on chemical potential difference between interface was use to describe surface reaction process instead of an empirical exponential equation. The model shows that the resistance of the surface reaction step, which includes hydration of K+ ions on the surface and their transport in the solid phase, is the main resistance of the ion exchange process.
机译：通过离子选择电极精确测定了K2Ti4O9纤维在恒定pH值下的离子交换动力学，并通过Lu-Maurer方程计算了溶液中离子的活度系数。发现固相中的平衡时间和TiO 2 / K 2 O摩尔比对pH比对水量更敏感。此后，建立了两步交换动力学模型，其中使用基于界面之间化学势差的统计速率理论来描述表面反应过程，而不是经验指数方程。该模型表明，表面反应步骤的电阻是离子交换过程的主要电阻，其中包括表面上的K +离子水合以及它们在固相中的传输。

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