• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Characterizations of the Photocatalytically-Oxidized Cross-Linked Chitosan-Glutaraldehyde and its Application as a Sub-Layer in the TiO_2/CS-GLA Bilayer Photocatalyst System
【24h】

Characterizations of the Photocatalytically-Oxidized Cross-Linked Chitosan-Glutaraldehyde and its Application as a Sub-Layer in the TiO_2/CS-GLA Bilayer Photocatalyst System

机译：光催化氧化的交联壳聚糖-戊二醛的表征及其在TiO_2 / CS-GLA双层光催化剂体系中的应用

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

Photocatalytically-oxidized cross-linked chito-san-glutaraldehyde (CS-GLA) was obtained via irradiation of a simple assemblage of an immobilized layer-by-layer TiO_2/CS-GLA system on a glass plate with a 45-W fluorescent lamp. The oxidation process was observed to occur only in the presence of oxygen and TiO_2 within 5 cycles (10 h) of irradiation. Characterizations studies of the oxidized cross-linked polymer involving swelling index, pH-potentiometric titration and ionic conductivity measurements, as well as CHN, FTIR, ~(13)C solid-state NMR,UV-Vis DRS and photoluminescence spectroscopy analyses generally indicated that the oxidation led to the formation of carbonyl groups, partial elimination of some un-reacted amino groups and change of visual color to be more brown without altering much of the whole molecular structure of the CS-GLA. This study also indicated that the photocata-lytic performance of TiO_2/oxidized CS-GLA system was higher than both TiO_2/CS-GLA system and TiO_2 single layer for the removal of phenol. Moreover, the adsorption effect was extremely negligible and the photodegradation of phenol was mainly due to the photocatalytic process.
机译：通过将固定的逐层TiO_2 / CS-GLA系统简单组装到带有45W荧光灯的玻璃板上，通过辐照获得光催化氧化的交联壳聚糖-戊二醛（CS-GLA）。观察到氧化过程仅在氧和TiO_2的存在下，在5个照射周期（10小时）内发生。氧化交联聚合物的表征研究涉及溶胀指数，pH电位滴定和离子电导率测量，以及CHN，FTIR，〜（13）C固态NMR，UV-Vis DRS和光致发光光谱分析，通常表明：氧化导致羰基的形成，部分未反应的氨基的部分消除以及视觉颜色的变化，在不改变CS-GLA整个分子结构的大部分的情况下，其颜色变为更棕色。这项研究还表明，TiO_2 /氧化的CS-GLA体系的光催化性能均优于TiO_2 / CS-GLA体系和TiO_2单层对苯酚的去除。此外，吸附效果极小，苯酚的光降解主要归因于光催化过程。

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