...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Studies on nanostructured Bi_2WO_6: Convenient hydrothermal and TiO_2-coating pathways
【24h】

Studies on nanostructured Bi_2WO_6: Convenient hydrothermal and TiO_2-coating pathways

机译：纳米结构Bi_2WO_6的研究：便捷的水热和TiO_2涂覆途径

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

Bismuth tungstate is an important conductor and photocatalyst that keeps attracting research interest due to its promising catalytic activity under visible light irradiation, The 2D Aurivillius-type structure of Bi _2WO_6 promotes its tendency towards the formation of nanosheets that can be converted into hierarchically structured Bi _2WO_6 microspheres. As their formation mechanism varies strongly with the preparative parameters and further investigations are required, we present studies on the most direct and convenient access to Bi _2WO_6 nano-architectures developed hitherto. Our one-step approach towards this key material is based on the immediate hydrothermal reaction of Bi(NO_3)_35H_2O with K _2WO_4 that proceeds through a mechanism that differs from the previously observed routes. These insights are essential for the development of straightforward technical processes in order to produce nanomaterials without complicated parameter adjustments. The resulting Bi_2WO _6 nanostructures display high photocatalytic activity under visible light irradiation. For the first time, the influence of an inorganic additive, K_2SO_4, is investigated in the Bi(NO_3) _3·5H_2O/K_2WO_4 hydrothermal system. This paved, the way to the synthesis and stabilization of other bismuth oxide-based materials at lower temperatures. Furthermore, we developed a flexible and efficient solutionbased coating process to cover the hierarchical Bi_2WO_6 arrangements with a thin layer of anatase TiO _2 nanoparticles.
机译：钨酸铋是重要的导体和光催化剂，由于其在可见光照射下的有前途的催化活性而一直吸引着研究兴趣。Bi_2WO_6的二维Aurivillius型结构促进了其形成纳米片的趋势，该纳米片可以转化为分层结构的Bi _2WO_6微球。由于它们的形成机理随制备参数的不同而有很大的差异，因此需要进一步的研究，因此，我们对目前开发的Bi _2WO_6纳米结构进行最直接，最便捷的研究。我们针对该关键材料的一步方法是基于Bi（NO_3）_35H_2O与K _2WO_4的立即水热反应，该反应通过不同于先前观察到的途径的机理进行。这些见解对于开发简单的工艺流程至关重要，以便无需复杂的参数调整即可生产纳米材料。所得的Bi_2WO _6纳米结构在可见光照射下显示出高的光催化活性。首次在Bi（NO_3）_3·5H_2O / K_2WO_4水热体系中研究了无机添加剂K_2SO_4的影响。这为在较低温度下合成和稳定其他氧化铋基材料铺平了道路。此外，我们开发了一种灵活而高效的基于溶液的涂覆工艺，以覆盖一层薄薄的锐钛矿型TiO _2纳米颗粒的Bi_2WO_6排列。

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