氧气空隙诱导的原子级接口在Z方案中SnO2/SnNb2O6 强大的太阳能驱动CO2转换的异质连接
Hui Li1,2, Haojie Tong1, Jingyu Zhang1
1─Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
ACS applied materials & interfaces
|July 19, 2023
概括
在Ov-SnO2/SnNb2的O6异质连接中设计的氧气空缺增强了Z模式的电荷转移,以实现高效的光催化CO2减排,实现高的CO演变速率.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 摄影化学的使用.
背景情况:
- 有效的光催化CO2减少需要在异构结构中优化Z模式的电荷转移.
- 构建能够促进Z模式电荷转移的紧型异构接口是一个重大挑战.
研究的目的:
- 准备一个Ov-SnO2/SnNb2O6异质连接,具有接口Nb-O-Sn键和内置电场,用于增强光催化CO2转换.
- 在原子层面研究Z模式电荷转移调制的机制.
主要方法:
- 制造Ov-SnO2/SnNb2O6异质连接. 在这种情况下,Ov-SnO2/SnNb2和O6的异质连接是指Ov-SnO2/SnNb2的异质连接.
- 在模拟的阳光下进行光催化CO2减少实验.
- 使用电子磁共振 (EPR) 和现场里埃变换红外光谱法 (FTIR) 进行表征.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 在Ov-SnO2/SnNb2O6异质连接处构建了一个原子级接口.
- 该Ov-SnO2/SnNb2O6光催化剂实现了CO演化速率为147.4 μmol h-1 g-1,大约是对照组的3-3.3倍.
- 观察到高循环性,在五个循环后保持了95.8%的速度.
结论:
- 接口Nb-O-Sn键和内置的电场,由氧气空缺引起,有效地加速Z-方案的电荷转移.
- 原子级接口工程提供了一个有前途的策略,以提高光催化性能,以减少二氧化碳.
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