{"title":"Multiscale synergetic bandgap/structure engineering for the construction of full-spectrum-responsive heterostructured MoS2/SnS2 photocatalyst†","authors":"Wenjie Zhao, Jinyan Liu, Weiye Hou, Zhe Zhang, Xinrui Chen, Xianghua Zeng and Weiwei Xia","doi":"10.1039/D4TC03035D","DOIUrl":null,"url":null,"abstract":"<p >A 2D-MoS<small><sub>2</sub></small>/2D-SnS<small><sub>2</sub></small> photocatalyst with a van der Waals (vdW) heterojunction has been prepared in this work by the self-assembly of MoS<small><sub>2</sub></small> nanosheets on the SnS<small><sub>2</sub></small> microflake surface. The multi-scale micro-nano hierarchical structure of MoS<small><sub>2</sub></small> with a narrow bandgap (1.27 eV) exhibits an obvious photothermal effect and significantly enhanced light absorption ability in the wide wavelength range of 200–2000 nm. Both experimental investigation and corresponding simulations based on the density functional theory demonstrate that the vdW interaction and internal electric field between MoS<small><sub>2</sub></small> and SnS<small><sub>2</sub></small> favor direct Z-scheme charge separation and transportation effectively. As a result, the optimized MoS<small><sub>2</sub></small>/SnS<small><sub>2</sub></small> Z-scheme heterojunction photocatalyst with full-spectrum response displays excellent photocatalytic CO<small><sub>2</sub></small> reduction performance. In particular, the MoS<small><sub>2</sub></small>/SnS<small><sub>2</sub></small> photocatalyst was able to maintain excellent photocatalytic CO<small><sub>2</sub></small> reduction performance under NIR light irradiation at 880 nm and achieved a maximum CO yield of 0.033 mmol cm<small><sup>−2</sup></small> h<small><sup>−1</sup></small> when the laser output power reached 20 W. This work may provide valuable guidance for the construction of vdW Z-scheme heterojunction photocatalysts for high-efficiency photocatalytic CO<small><sub>2</sub></small> reduction and effective solar light utilization.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry C","FirstCategoryId":"1","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/tc/d4tc03035d","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A 2D-MoS2/2D-SnS2 photocatalyst with a van der Waals (vdW) heterojunction has been prepared in this work by the self-assembly of MoS2 nanosheets on the SnS2 microflake surface. The multi-scale micro-nano hierarchical structure of MoS2 with a narrow bandgap (1.27 eV) exhibits an obvious photothermal effect and significantly enhanced light absorption ability in the wide wavelength range of 200–2000 nm. Both experimental investigation and corresponding simulations based on the density functional theory demonstrate that the vdW interaction and internal electric field between MoS2 and SnS2 favor direct Z-scheme charge separation and transportation effectively. As a result, the optimized MoS2/SnS2 Z-scheme heterojunction photocatalyst with full-spectrum response displays excellent photocatalytic CO2 reduction performance. In particular, the MoS2/SnS2 photocatalyst was able to maintain excellent photocatalytic CO2 reduction performance under NIR light irradiation at 880 nm and achieved a maximum CO yield of 0.033 mmol cm−2 h−1 when the laser output power reached 20 W. This work may provide valuable guidance for the construction of vdW Z-scheme heterojunction photocatalysts for high-efficiency photocatalytic CO2 reduction and effective solar light utilization.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors