...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ChemPlusChem >Synthesis of NiGa2O4 Octahedron Nanocrystal with Exposed {111} Facets and Enhanced Efficiency of Photocatalytic Water Splitting
【24h】

Synthesis of NiGa2O4 Octahedron Nanocrystal with Exposed {111} Facets and Enhanced Efficiency of Photocatalytic Water Splitting

机译：用暴露的{111}突出的Niga2O4八面体纳米晶体的合成，并提高光催化水分裂效率

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

For the first time, octahedral NiGa2O4 nanocrystals having reactive pH-dependent {111} facets are synthesized through a facile hydrothermal route without using any template or organic surfactant. The {111} facets of octahedral NiGa2O4 display clearly enhanced photocatalytic generation of hydrogen and oxygen from water splitting and good photocatalytic stability. Density functional calculations suggest that mixed statistically occupied Ga/Ni (fourfold-and sixfold-coordinated Ga/Ni) are most likely to be exposed at the (111) surface of NiGa2O4, which is very favorable for enhancing the photocatalytic activities, and the photoelectrochemical properties show that the NiGa2O4 octahedron displays a better photocurrent than NiGa2O4 nanorods with the [100] growth direction. The transient photocurrent decay scan results demonstrate that the NiGa2O4 octahedron exposed {111} facet electrode exhibits a transient decay time of 4 s, whereas this time is only 2 s for NiGa2O4 nanorod electrodes with the [100] growth direction. This longer transient decay time indicates that the charge-carrier recombination rate is lower in the NiGa2O4 octahedron electrode, which will contribute to the enhancement of the photocatalytic activity. The present study also demonstrates that designing nanostructures with the appropriate morphology and surface structures is a feasible approach for enhancing the photoexcited charge-transfer lifetime and developing highly active semiconductor photocatalysts.
机译：首次，通过容易的水热路线合成具有反应性pH依赖性{111}小件的八面体NigA2O4纳米晶体，而不使用任何模板或有机表面活性剂。八面体Niga2O4的{111}刻面显示出明显增强的光催化产生氢气和氧气从水分裂和良好的光催化稳定性。密度函数计算表明，混合的统计上占用的GA / Ni（四倍和六倍协调的Ga / Ni）最有可能暴露在NigA2O4的（111）表面上暴露，这对于增强光催化活性和光电化学非常有利属性表明，NigA2O4八面体显示器比Niga2O4纳米棒与[100]生长方向更好地光电流。瞬态光电流衰减扫描结果表明，Niga2O4八面体暴露的{111}面电极表现出4 s的瞬态衰减时间，而这次是Niga2O4纳米棒电极仅具有[100]生长方向的2 s。该较长的瞬态衰减时间表明，NIGA2O4八面体电极的电荷载体重组率较低，这将有助于增强光催化活性。本研究还证明，设计具有适当形态和表面结构的纳米结构是一种可行的方法，用于增强光屏蔽电荷 - 转移寿命和开发高活性半导体光催化剂。

著录项

  • 来源
    《ChemPlusChem》 |2015年第1期|共8页
  • 作者

    Zhou Shi-Xiong; Lv Xiao-Jun; Zhang Chen; Huang Xing; Kang Lei; Lin Zhe-shuai; Chen Yong; Fu Wen-Fu;

  • 作者单位

    Chinese Acad Sci Tech Inst Phys &

    Chem Key Lab Photochem Convers &

    Optoelect Mat Beijing 100190;

    Chinese Acad Sci Tech Inst Phys &

    Chem Key Lab Photochem Convers &

    Optoelect Mat Beijing 100190;

    Yunnan Normal Univ Coll Chem &

    Chem Engn Kunming 650092 Peoples R China;

    Chinese Acad Sci Tech Inst Phys &

    Chem Key Lab Photochem Convers &

    Optoelect Mat Beijing 100190;

    Chinese Acad Sci Tech Inst Phys &

    Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Tech Inst Phys &

    Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Tech Inst Phys &

    Chem Key Lab Photochem Convers &

    Optoelect Mat Beijing 100190;

    Chinese Acad Sci Tech Inst Phys &

    Chem Key Lab Photochem Convers &

    Optoelect Mat Beijing 100190;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

    density functional calculations; hydrothermal synthesis; octahedral NiGa2O4; photocatalytic activity; water splitting;

    机译：密度函数计算;水热合成;八面体Niga2O4;光催化活性;水分裂;

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