• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >A green method to prepare TiO2/MWCNT nanocomposites with high photocatalytic activity and insights into the effect of heat treatment on photocatalytic activity
【24h】

A green method to prepare TiO2/MWCNT nanocomposites with high photocatalytic activity and insights into the effect of heat treatment on photocatalytic activity

机译：一种用高光催化活性制备TiO2 / MWCNT纳米复合材料的绿色方法，并洞察热处理对光催化活性的影响

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

Nanocomposites consisting of well-defined anatase TiO2 nanoparticles with an average diameter of 8 nm and multi-walled carbon nanotubes (MWCNTs) were fabricated by a facile two-step hydrothermal method using water as the main solvent, which is friendly to the environment and totally different from previous methods. The TiO2 nanoparticles were uniformly grafted on the surface of MWCNTs via intimate chemical bonds, which was beneficial for the enhancement of photocatalytic activity. The photocatalytic activities of as-prepared TiO2/MWCNT nanocomposites for degradation of rhodamine B under solar simulator illumination were investigated systemically. It was found that the photocatalytic activity of asprepared TiO2/MWCNT nanocomposites was 7 times higher than that of pure TiO2 prepared via the same hydrothermal procedure. The enhancement was mainly due to the existence of MWCNTs, which could not only greatly improve the adsorption of rhodamine B, but also retard the recombination of photogenerated electron-hole pairs and absorb more light. The photocatalytic performance was further enhanced after being annealed at 400 degrees C and 500 degrees C for 1 h because of the improved crystallinity of anatase TiO2. Interestingly, the photocatalytic activities of samples annealed at 400 degrees C and 500 degrees C showed no difference, which was different from previous reports.
机译：由使用水作为主要溶剂的容易的两步水热法制造由平均直径为8nm和多壁碳纳米管（MWCNT）的明确定义的锐钛酶TiO2纳米颗粒组成的纳米复合材料由使用水作为主要溶剂，对环境友好而且完全是友好的与以前的方法不同。通过亲密的化学键均匀地接枝TiO2纳米颗粒在MWCNT的表面上均匀地接枝，这对于增强光催化活性有益。系统性地研究了如制备的TiO2 / MWCNT纳米复合材料的光催化活性，用于在太阳模拟器照射下进行罗丹明B降解的纳米复合材料。发现呈载体TiO2 / MWCNT纳米复合材料的光催化活性比通过相同的水热程序制备的纯TiO 2高7倍。增强主要是由于MWCNT的存在，这不仅可以大大改善罗丹明B的吸附，而且还延迟了光敏电子 - 空穴对的重组并吸收更多的光。由于锐钛矿TiO 2的改进结晶度，在400℃和500℃下退火1小时后进一步增强光催化性能。有趣的是，在400摄氏度和500℃下退火的样品的光催化活性显示出没有差异，这与先前的报道不同。

著录项

  • 来源
    《RSC Advances》 |2015年第18期|共7页
  • 作者

    Zeng Qingping; Li Hua; Duan Huanan; Guo Yiping; Liu Xuefa; Zhang Yangyang; Liu Hezhou;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China;

  • 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