物理化学学报2022，Vol.38Issue(7)：16-25,10.DOI:10.3866/PKU.WHXB202109023
Mn0.2Cd0.8S@CoAl LDH S-型异质结构建及其光催化析氢性能研究
Rationally Designed Mn0.2Cd0.8S@CoAl LDH S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Production
摘要
Abstract
Constructing an efficient and stable heterojunction photocatalyst system is a promising approach to achieve solar-driven water splitting to produce hydrogen.In this work,a novel Mn0.2Cd0.8S@CoAlLDH(MCCA)S-scheme heterojunction was successfully prepared through the efficient coupling of Mn0.2Cd0.8S nanorods and CoAl LDH nanosheets,employing a physical mixing method.The photoluminescence and photocurrent-time response results demonstrated that the internal electric field of the constructed MCCA S-scheme heterojunction could successfully accelerate charge separation and electron transfer between the Mn0.2Cd0.8S interface and the CoAl LDH.Critically,the introduction of the CoAl LDH effectively inhibited the recombination of photogenerated electrons and holes,thereby improving the photocatalytic hydrogen production activity of Mn0.2Cd0.8S.A maximum H2 production of 1177.9 pmol in 5 h was obtained with MCCA-3.This represents a significant improvement compared to what can be achieved with the pure Mn0.2Cd0.8S nanorods and CoAl LDH nanosheets individually.This work provides a simple and effective approach for the rational design of S-scheme heterojunction photocatalysts for photocatalytic hydrogen production.关键词
Mn0.2Cd0.8S/CoAl LDH/S型异质结/光催化产氢Key words
Mn0.2Cd0.8S/CoAl LDH/S-scheme heterojunction/Photocatalytic H2 production分类
化学化工引用本文复制引用
刘珊池,王凯,杨梦雪,靳治良..Mn0.2Cd0.8S@CoAl LDH S-型异质结构建及其光催化析氢性能研究[J].物理化学学报,2022,38(7):16-25,10.基金项目
This work was supported by the Natural Science Foundation of Ningxia Province(2021AAC03225)and the Fundamental Research Funds for the Central Universities of North Minzu University(2020KYQD29).宁夏自然科学基金项目(2021AAC03225),北方民族大学中央高校基本科研业务费资助项目(2020KYQD29) （2021AAC03225）
