Z型异质结的结构及其在光催化领域的应用

On Structure of Z-Scheme Heterojunctions and Its Application in the Photocatalysis Fields

Z型异质结能够将光生电子-空穴对在不同的半导体上实现有效的空间分离,氧化还原能力强、电荷分离效率高、稳定性高,具有较宽的光谱响应。Z型异质结可分为具有氧化还原介质的Z型异质结、直接Z型异质结、具有固态电子介质的Z型异质结。对Z型异质结发展的三个阶段及其电荷转移机制进行了分析,自由基捕获实验和X射线光电子能谱测试方法是分析其电荷传输路径的有效方法。Z型异质结光催化剂是一种非常有潜力的能源材料,在光催化产氢、全水分解、CO_(2)还原广泛应用。未来Z型异质结光催化剂的研究应集中在开发可大规模制备的低成本、高性能光催化剂,以便于实际应用。

The Z-scheme heterojunctions can effectively separate the photogenerated electron-hole pairs on different semiconductors.It has strong redox ability,high charge separation effi ciency,high stability and wider spectral response.The structure of Z-scheme heterojunctions can be divided into Z-scheme heterojunctions with redox mediators,direct Z-scheme heterojunctions,and Z-scheme heterojunctions with solid-state electronic mediators.The three stages of Z-scheme heterojunction development and its charge transfer mechanism were analyzed.The free radical trapping experiment and X-ray photoelectron spectroscopy test methods are eff ective methods to analyze its charge transfer path.Z-scheme heterojunction photocatalyst is a very promising energy material,which is widely used in photocatalytic H_(2) production,overall water splitting,and CO_(2) reduction.Future research on Z-scheme heterojunction photocatalysts should focus on developing low-cost,high-performance photocatalysts that can be prepared on a large scale for practical applications..