{"title":"用于构建全光谱响应型异质结构 MoS2/SnS2 光催化剂的多尺度协同带隙/结构工程†。","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":"{\"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. 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引用次数: 0
摘要
本研究通过在 SnS2 微薄片表面自组装 MoS2 纳米片,制备了一种具有范德华(vdW)异质结的 2D-MoS2/2D-SnS2 光催化剂。这种具有窄带隙(1.27 eV)的多尺度微纳分层结构的 MoS2 具有明显的光热效应,并在 200-2000 nm 的宽波长范围内显著增强了光吸收能力。实验研究和基于密度泛函理论的相应模拟都表明,MoS2 和 SnS2 之间的 vdW 相互作用和内部电场有利于 Z 型电荷的直接分离和有效传输。因此,经过优化的具有全光谱响应的 MoS2/SnS2 Z 型异质结光催化剂显示出优异的光催化还原 CO2 性能。特别是在 880 纳米近红外光照射下,MoS2/SnS2 光催化剂仍能保持优异的光催化还原 CO2 性能,当激光输出功率达到 20 W 时,CO 产率最高可达 0.033 mmol cm-2 h-1。这项工作可为构建 vdW Z 型异质结光催化剂以实现高效光催化还原 CO2 和有效利用太阳光提供有价值的指导。
Multiscale synergetic bandgap/structure engineering for the construction of full-spectrum-responsive heterostructured MoS2/SnS2 photocatalyst†
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