氧气空缺被限制在超薄的氧化多孔板中,用于促进可见光水分裂
Fengcai Lei1, Yongfu Sun, Katong Liu
1Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science & Technology of China , Hefei, Anhui 230026, P.R. China.
Journal of the American Chemical Society
|April 30, 2014
概括
合成了含有氧气空缺的超薄氧化物 (In2O3) 片. 这些位通过缩小带间隙和改善电荷分离来增强可见光光催化.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 光催化作用的光催化
背景情况:
- 了解氧气空缺在光催化中的作用至关重要,但具有挑战性.
- 原子薄材料为研究缺陷相关性质提供了独特的平台.
研究的目的:
- 开发一个模型系统来研究氧空缺与光催化之间的关系.
- 为了合成超薄的氧化物 (In2O3) 板,控制氧空隙度.
主要方法:
- 使用六边形的半角结构的In-oleate复合物进行中镜组合的快速加热策略.
- 合成O-空位丰富和O-空位贫乏的5原子厚的In2O3多孔板.
- 材料性能和光催化性能的理论和实验性表征.
主要成果:
- 氧气空缺创造了一个新的捐赠水平,并增加了In2O3表中的状态密度.
- 观察到带间隙从紫外线缩小到可见光模式,并提高了载体分离效率.
- 富含O空位的In2O3光电极显示出1.73 mA/cm的可见光光电流,显著优于O空位贫乏和散装的In2O3.
结论:
- 原子薄的In2O3叶片具有封闭的氧空隙,可以作为光催化研究的优秀平台.
- 氧气空缺是通过调整电子特性来增强In2O3可见光光催化活性的关键.
- 开发的合成策略可以精确控制氧气空缺,以优化光催化应用.
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