• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Enhanced photocatalytic activity of wool fibers having titanium dioxide nanoparticles formed inside their cortex
【24h】

Enhanced photocatalytic activity of wool fibers having titanium dioxide nanoparticles formed inside their cortex

机译：增强了在其皮层内部形成的二氧化钛纳米颗粒的羊毛纤维的光催化活性

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

A wool-TiO2 nanoparticle composite material having TiO2 nanoparticles both infiltrated in the matrix between macrofibrils inside cortical cells of wool fibers and grafted on the fiber surface is obtained in this study, and the wool-nanoparticle composite material is found to have highly photocatalytic activities with an extremely narrow band gap of 2.8 eV. The wool fibers are obtained using three successive technical steps: wool fibers are swollen by using lithium bromide, then saturated with tetrabutyl titanate ethanol solution and subsequently treated in boiling water. It was demonstrated that the chemical bonds formed between the as-synthesized TiO2 nanoparticles and the wool fibers swollen by lithium bromide include C-Ti4+(Ti3+), NTi4+(Ti3+), O-Ti3+, and S-Ti4+ (Ti3+) bonds. The modified wool fibers have shown markedly improved photocatalytic efficiency due to their enhanced visible light absorption capability, which is much better than the (N-doped) TiO2 coated wool fibers. In contrast, TiO2 modified wool fibers swollen by using formic acid have poorer photoactivity, this might be due to the elimination of trivalent titanium between TiO2 nanoparticles and the wool fibers.
机译：具有TiO 2的羊毛二氧化钛纳米粒子复合材料的纳米颗粒都在基体中羊毛纤维的皮层细胞内渗透macrofibrils之间并接枝在纤维表面上在这项研究中获得，和羊毛的纳米粒子复合材料发现有高度的光催化活性用2.8电子伏特的极窄的带隙。羊毛纤维是使用三个连续的技术步骤得到：羊毛纤维通过使用溴化锂，然后用钛酸四丁酯的乙醇溶液饱和，随后在沸水中处理溶胀。已证实所合成的TiO 2纳米颗粒和由溴化锂溶胀羊毛纤维之间形成的化学键包括C-的Ti4 +（TI3 +），NTi4 +（TI3 +），O-Ti 3+的，和S-的Ti4 +（TI3 +）键。的改性羊毛纤维已显示显着地提高光催化效率，由于其增强的可见光的光吸收能力，其比（N掺杂）好得多的TiO 2涂覆的羊毛纤维。与此相反，二氧化钛改性通过使用甲酸溶胀的羊毛纤维具有较差的光活性，这可能是由于消除了TiO 2纳米颗粒和羊毛纤维之间三价钛。

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