用高效的O2演变共催化剂和电子介质对氧化固体溶液光催化剂进行修改,用于两步光激发的整体水分裂
Wenzheng Sun1,2, Ying Luo1,2, Jun Xu1,2
1State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zhengwang@rcees.ac.cn.
Nanoscale
|January 4, 2024
概括
这项研究开发了一种新型的高 bismuth-tantalum oxyhalide光催化剂,用于通过两步水分裂有效地生产太阳能气. 增强材料实现了1.26%的量子产量,超过了现有系统.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 可再生能源可再生能源是可再生能源.
背景情况:
- 使用颗粒物光催化剂的两步光刺激水分裂为太阳能生产提供了低成本的途径.
- 有效的氧化演化光催化剂和电子介质对于有效的两步水分系统至关重要.
- 比斯-氧化物正在成为氧化物进化反应的有希望的光催化剂.
研究的目的:
- 为了合成和表征一种新型的高温 bismuth-tantalum oxyhalide固体溶液,以增强光催化活性.
- 构建和评估一个两步激发的整体水分系统,利用开发的光催化剂.
- 调查表面修改对光催化性能和太阳能气生产效率的影响.
主要方法:
- 通过双流法合成具有微血小板形态的高度结晶的Bi$_{4}$TaO$_{8}$Cl$_{0.9}$Br$_{0.1}$固体溶液.
- 使用Bi$_{4}$TaO$_{8}$Cl$_{0.9}$Br$_{0.1}$作为O$_{2}$进化光催化剂和Ru/SrTiO$_{3}$:Rh作为H$_{2}$进化光催化剂的两步激发水分裂系统的构建,与固态电子介质.
- 表面修改Bi$_{4}$TaO$_{8}$Cl$_{0.9}$Br$_{0.1}$使用CoO$_{x}$共催化剂和减少的石墨烯氧化物.
主要成果:
- 合成的Bi$_{4}$TaO$_{8}$Cl$_{0.9}$Br$_{0.1}$与Bi$_{4}$TaO$_{8}$Cl和Bi$_{4}$TaO$_{8}$Br.Cl相比,显示了增强的光吸收和电荷传输效率.
- 两步激发的整体水分系统在420nm时实现了1.26%的表面量子产量.
- 使用CoO_{x}$和减少氧化石墨烯的表面修饰显著促进了O$_{2}$的生成和电子转移.
结论:
- 开发的Bi$_{4}$TaO$_{8}$Cl$_{0.9}$Br$_{0.1}$固溶液光催化剂对于整体的水分裂非常有效.
- 该研究成功地展示了一种高效的两步激发水分系统,超越了现有的基于金属氧化的系统.
- 高质量的固体溶液光催化剂与适当的表面修改对于高效的太阳能气生产至关重要.
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