Nanostructured CdS for efficient photocatalytic H2 evolution: A review

纳米结构硫化镉光催化分解水产氢综述

Cadmium sulfide(Cd S)-based photocatalysts have attracted extensive attention owing to their strong visible light absorption,suitable band energy levels,and excellent electronic charge transportation properties.This review focuses on the recent progress related to the design,modification,and construction of Cd S-based photocatalysts with excellent photocatalytic H2 evolution performances.First,the basic concepts and mechanisms of photocatalytic H2 evolution are briefly introduced.Thereafter,the fundamental properties,important advancements,and bottlenecks of Cd S in photocatalytic H2 generation are presented in detail to provide an overview of the potential of this material.Subsequently,various modification strategies adopted for Cd S-based photocatalysts to yield solar H2 are discussed,among which the effective approaches aim at generating more charge carriers,promoting efficient charge separation,boosting interfacial charge transfer,accelerating charge utilization,and suppressing charge-induced self-photocorrosion.The critical factors governing the performance of the photocatalyst and the feasibility of each modification strategy toward shaping future research directions are comprehensively discussed with examples.Finally,the prospects and challenges encountered in developing nanostructured Cd S and Cd S-based nanocomposites in photocatalytic H2 evolution are presented.

太阳能驱动光催化分解水制氢是实现可持续制氢气的一种有效策略.硫化镉半导体光催化剂基于其较强的可见光响应、适宜的氧化还原反应带边位置以及优异的电荷传输性能而备受关注.本文综述了近年来国内外在提高硫化镉基光催化剂制氢性能的设计、改性和制备等方面的研究进展.首先简要介绍了光催化制氢的基本概念和机理,阐述了硫化镉光催化制氢的基本性质、重要进展和瓶颈,综述了该材料的发展前景.随后,重点讨论了硫化镉基光催化剂光催化分解水产氢的各种改性策略,其中有效的策略是产生更多的载流子,促进电荷的有效分离,促进界面电荷转移,加速电荷利用,以及抑制电荷诱导的自光腐蚀.针对每一种改性策略,都详细讨论了影响光催化剂性能的重要因素和未来潜在的研究方向.最后介绍了纳米结构硫化镉和硫化镉基纳米复合材料在光催化分解水产氢中的发展前景和面临的挑战.本综述将为开发镉基半导体光催化剂提供重要和及时的理论指导,并促进其在太阳能氢气生产中的应用.