Construction of Cu2MoS4/ZnO Heterostructures and Mechanism of Photocatalytic Hydrogen Production

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-01-14 DOI:10.1021/acs.langmuir.4c04325

Yanli Zhuang, Hao Cheng, Shuo Tian, Yancheng Hao, Jikun Pan, Zihuan Zhang, Dan Li, Limin Dong, Jian Li, You Li, Xinxin Jin

{"title":"Construction of Cu2MoS4/ZnO Heterostructures and Mechanism of Photocatalytic Hydrogen Production","authors":"Yanli Zhuang, Hao Cheng, Shuo Tian, Yancheng Hao, Jikun Pan, Zihuan Zhang, Dan Li, Limin Dong, Jian Li, You Li, Xinxin Jin","doi":"10.1021/acs.langmuir.4c04325","DOIUrl":null,"url":null,"abstract":"Constructing wide and narrow band gap heterogeneous semiconductors is a method to improve the activity of photocatalysts. In this paper, CMS/ZnO heterojunctions were prepared by solvothermal loading of ZnO particles on the surface of Cu2MoS4 nanosheets. The photocatalytic H2 precipitation rate is about 545 μmol·g–1·h–1, which is 6.8 times that of Cu2MoS4 and 3 times that of ZnO without any cocatalyst. After etching modification of CMS, the photocatalytic hydrogen production efficiency of the ECMS/ZnO heterojunction is further improved. Its hydrogen production efficiency reaches about 1115 μmol·g–1·h–1, which is 9 times that of ECMS and 6 times that of ZnO. The reasons are mainly attributed to the following two factors: (1) the formation of the ECMS/ZnO type-II-type heterojunction facilitates the effective separation of photogenerated electrons and holes; (2) the band structure of Cu2MoS4 was optimized by etching modification, which made the ECMS/ZnO heterojunction have lower interfacial charge transfer resistance and improved the photocatalytic hydrogen production activity of the heterojunction.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"77 1","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.langmuir.4c04325","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Constructing wide and narrow band gap heterogeneous semiconductors is a method to improve the activity of photocatalysts. In this paper, CMS/ZnO heterojunctions were prepared by solvothermal loading of ZnO particles on the surface of Cu₂MoS₄ nanosheets. The photocatalytic H₂ precipitation rate is about 545 μmol·g^–1·h^–1, which is 6.8 times that of Cu₂MoS₄ and 3 times that of ZnO without any cocatalyst. After etching modification of CMS, the photocatalytic hydrogen production efficiency of the ECMS/ZnO heterojunction is further improved. Its hydrogen production efficiency reaches about 1115 μmol·g^–1·h^–1, which is 9 times that of ECMS and 6 times that of ZnO. The reasons are mainly attributed to the following two factors: (1) the formation of the ECMS/ZnO type-II-type heterojunction facilitates the effective separation of photogenerated electrons and holes; (2) the band structure of Cu₂MoS₄ was optimized by etching modification, which made the ECMS/ZnO heterojunction have lower interfacial charge transfer resistance and improved the photocatalytic hydrogen production activity of the heterojunction.

Abstract Image

查看原文本刊更多论文

构建宽窄带隙异质半导体是提高光催化剂活性的一种方法。本文通过在 Cu2MoS4 纳米片表面溶热负载 ZnO 颗粒的方法制备了 CMS/ZnO 异质结。光催化析出 H2 的速率约为 545 μmol-g-1-h-1，是 Cu2MoS4 的 6.8 倍，是未添加任何助催化剂的 ZnO 的 3 倍。对 CMS 进行蚀刻改性后，ECMS/ZnO 异质结的光催化制氢效率进一步提高。其产氢效率达到约 1115 μmol-g-1-h-1，是 ECMS 的 9 倍，ZnO 的 6 倍。究其原因，主要归结于以下两个因素：(1）ECMS/ZnO II 型异质结的形成有利于光生电子和空穴的有效分离；（2）通过刻蚀修饰优化了 Cu2MoS4 的能带结构，使 ECMS/ZnO 异质结的界面电荷转移电阻降低，提高了异质结的光催化制氢活性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).