• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Enhanced photocatalytic activities of visible-light driven green synthesis in water and environmental remediation on Au/Bi2WO6 hybrid nanostructures
【24h】

Enhanced photocatalytic activities of visible-light driven green synthesis in water and environmental remediation on Au/Bi2WO6 hybrid nanostructures

机译：Au / Bi2WO6杂化纳米结构在水中的可见光驱动绿色合成和环境修复中的光催化活性增强。

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 series of Au/Bi2WO6 nanocomposites with different weight ratios of Au were fabricated via a hydrothermal combined with a rapid reduction-deposition method. Au/Bi2WO6 nanocomposites are proven to serve as selective visible light photocatalysts toward aerobic oxidation of benzylic alcohols and reduction of heavy ions Cr(VI), instead of being nonselective in water. Loading Au NPs greatly enhances the photocatalytic activity of Bi2WO6 for the selective oxidation of alcohols and reduction of heavy metal ions. The enhancing effect is dependent on the weight ratios of Au to Bi2WO6 in the hybrid nanostructures. The optimal catalysts for alcohol oxidation and Cr(VI) reduction are 2.0 wt% and 1.0 wt% Au/Bi2WO6, respectively. Furthermore, we find that loading Au results in an obvious increase in photo-induced generation of charge carriers and active radicals determined by electron spin resonance spectroscopy (ESR). ESR signals denoting photogenerated holes and catalytic activity of alcohol oxidation have a similar dependence on the amounts of Au loading. Besides, the generation and transfer of photogenerated electrons induced by Au loading, as well as the relationship with the photocatalytic activity of Cr(VI) reduction, have been examined using photoelectrochemical characterization. The possible roles of Au deposition in improving the photocatalytic redox activity of Bi2WO6 are also discussed.
机译：通过水热结合快速还原沉积法制备了一系列不同重量比的Au / Bi2WO6纳米复合材料。事实证明，Au / Bi2WO6纳米复合材料可作为选择性可见光催化剂，用于需氧氧化苯甲醇和还原重离子Cr（VI），而不是在水中具有选择性。负载金纳米颗粒大大增强了Bi2WO6对醇的选择性氧化和重金属离子还原的光催化活性。增强效果取决于杂化纳米结构中Au与Bi 2 WO 6的重量比。用于醇氧化和Cr（VI）还原的最佳催化剂分别为2.0 wt％和1.0 wt％Au / Bi2WO6。此外，我们发现负载Au会导致由电子自旋共振谱（ESR）确定的光生电荷载体和活性自由基的明显增加。表示光生空穴和醇氧化催化活性的ESR信号对Au负载量的依赖性相似。此外，已经通过光电化学表征研究了由金负载引起的光生电子的产生和转移以及与Cr（VI）还原的光催化活性的关系。还讨论了金沉积在改善Bi2WO6的光催化氧化还原活性中的可能作用。

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