Photocatalysis of Two-Dimensional (2D) Materials and Their Heterojunctions

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (19 January 2024) | Viewed by 2598

Special Issue Editor


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Guest Editor
Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan
Interests: low-dimensional materials; energy conversion applications; in situ study; advanced transmission electron microscopy

Special Issue Information

Dear Colleagues,

Photocatalysis is one of the important reactions of nanomaterials, and it provides an alternative reaction path to convert solar energy into different forms of energy for storage. Due to their high surface to volume ratio, extraordinary physical properties, and stability, two-dimensional (2D) materials have become one of the promising forms of materials of photocatalysts, and several types of photocatalysis reactions have been recently demonstrated, such as H2 evolution, CO2 reduction, N2 reduction, and water disinfection, among others. On the other hand, catalytic performances can be further improved by using heterojunctions as catalysts. Given a suitable band structure, photoexcited carriers can be effectively separated and then contribute to the catalytic reaction.

This Special Issue aims to publish the latest state-of-art research findings on photocatalysis of 2D materials and their heterojunctions, including the demonstration of various types of photocatalysis, enhancement of performance via different methodologies and concepts, and development of 2D materials and heterojunctions. Accounts of both experimental and theoretical research are welcome.

We look forward to receiving your contributions.

Prof. Dr. Ming-Yen Lu
Guest Editor

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Keywords

  • photocatalysis
  • hydrogen production
  • CO2 reduction
  • N2 reduction energy conversion
  • 2D materials
  • heterostructures

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Published Papers (1 paper)

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Research

14 pages, 5146 KiB  
Article
Rapid Microwave-Assisted Synthesis of ZnIn2S4 Nanosheets for Highly Efficient Photocatalytic Hydrogen Production
by Yu-Cheng Chang, Yung-Chang Chiao and Po-Chun Hsu
Nanomaterials 2023, 13(13), 1957; https://doi.org/10.3390/nano13131957 - 27 Jun 2023
Cited by 8 | Viewed by 2031
Abstract
In this study, a facile and rapid microwave-assisted synthesis method was used to synthesize In2S3 nanosheets, ZnS nanosheets, and ZnIn2S4 nanosheets with sulfur vacancies. The two-dimensional semiconductor photocatalysts of ZnIn2S4 nanosheets were characterized by [...] Read more.
In this study, a facile and rapid microwave-assisted synthesis method was used to synthesize In2S3 nanosheets, ZnS nanosheets, and ZnIn2S4 nanosheets with sulfur vacancies. The two-dimensional semiconductor photocatalysts of ZnIn2S4 nanosheets were characterized by XRD, FESEM, BET, TEM, XPS, UV–vis diffuse reflectance, and PL spectroscopy. The ZnIn2S4 with sulfur vacancies exhibited an evident energy bandgap value of 2.82 eV, as determined by UV–visible diffuse reflectance spectroscopy, and its energy band diagram was obtained through the combination of XPS and energy bandgap values. ZnIn2S4 nanosheets exhibited about 33.3 and 16.6 times higher photocatalytic hydrogen production than In2S3 nanosheets and ZnS nanosheets, respectively, under visible-light irradiation. Various factors, including materials, sacrificial reagents, and pH values, were used to evaluate the influence of ZnIn2S4 nanosheets on photocatalytic hydrogen production. In addition, the ZnIn2S4 nanosheets revealed the highest photocatalytic hydrogen production from seawater, which was about 209.4 and 106.7 times higher than that of In2S3 nanosheets and ZnS nanosheets, respectively. The presence of sulfur vacancies in ZnIn2S4 nanosheets offers promising opportunities for developing highly efficient and stable photocatalysts for photocatalytic hydrogen production from seawater under visible-light irradiation. Full article
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