• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >Hydrolytic Modification of SiO2 Microspheres with Na2SiO3 and the Performance of Supported Nano-TiO2 Composite Photocatalyst
【2h】

Hydrolytic Modification of SiO2 Microspheres with Na2SiO3 and the Performance of Supported Nano-TiO2 Composite Photocatalyst

机译：用Na2SiO3的SiO2微球的水解改性及负载纳米TiO2复合光催化剂的性能

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Modified microspheres (SiO2-M) were obtained by the hydrolytic modification of silicon dioxide (SiO2) microspheres with Na2SiO3, and then, SiO2-M was used as a carrier to prepare a composite photocatalyst (SiO2-M/TiO2) using the sol-gel method; i.e., nano-TiO2 was loaded on the surface of SiO2-M. The structure, morphology, and photocatalytic properties of SiO2-M/TiO2 were investigated. Besides, the mechanism of the effect of SiO2-M was also explored. The results show that the hydrolytic modification of Na2SiO3 coated the surface of SiO2 microspheres with an amorphous SiO2 shell layer and increased the quantity of hydroxyl groups. The photocatalytic performance of the composite photocatalyst was slightly better than that of pure nano-TiO2 and significantly better than that of the composite photocatalyst supported by unmodified SiO2. Thus, increasing the loading capacity of nano-TiO2, improving the dispersion of TiO2, and increasing the active surface sites are essential factors for improving the functional efficiency of nano-TiO2. This work provides a new concept for the design of composite photocatalysts by optimizing the performance of the carrier.
机译：通过用Na 2 SiO 3的二氧化硅（SiO 2）微球的水解改性得到改性的微球（SiO 2-M），然后使用SOL-用作制备复合光催化剂（SiO2-M / TiO 2）的SiO 2-M作为载体。凝胶方法;即，将纳米TiO 2装载在SiO 2-m的表面上。研究了SiO2-M / TiO2的结构，形态和光催化性质。此外，SiO2-M效果的机制也探讨。结果表明，Na2SiO3的水解改性用无定形SiO2壳层涂覆SiO2微球的表面并增加羟基的量。复合光催化剂的光催化性能略好于纯纳米TiO2，显着优于未修饰的SiO2负载的复合光催化剂。因此，增加纳米TiO 2的负载能力，改善TiO 2的分散，增加活性表面位点是提高纳米TiO2的功能效率的基本因素。这项工作通过优化载体的性能，为复合光催化剂设计提供了新的概念。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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