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Semiconductor Catalysis
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Semiconductor Catalysis

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: closed (31 October 2018) | Viewed by 16838

Special Issue Editor

Dr. Chong-Yong Lee

E-Mail Website
Guest Editor
Intelligent Polymer Research Institute, University of Wollongong, Wollongong, NSW 2522, Australia
Interests: electrocatalysis; electrochemical water splitting; electrochemical CO2 reduction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The seminal work of Honda and Fujishima in 1972 demonstrated the feasibility of photoelectrochemical water splitting via TiO2 to produce a high-energy carrier, hydrogen. This simple, yet powerful, solar-driven, clean energy technology has, since, promoted enormous research activities in catalysis, based on semiconducting materials.

Over the past 40 years, a wide-range of semiconductors have been employed as light absorbents to efficiently harvest solar energy, and the coupling of suitable catalysts, promoting chemical reactions to generate desirable fuels. Among the keys that underpin the progress in semiconductor catalysis are strategies, such as band-gap engineering, to tune the light absorption spectra and minimize charge recombination; integration of efficient co-catalysts; and rational material design through a fundamental understanding, assisted by advanced analytical tools and theoretical modeling. In particular, it is worth mentioning significant nanostructuring efforts with the formation of low-dimensional nanomaterials have led to morphologies with improved surface area, light absorption and photoelectric functional properties. More recently, semi-biological approaches with hybrid semiconductors and biological enzymes have increasingly become of interest.

This Special Issue aims to cover recent progress and developments in semiconductor catalysis in terms of the activation of small molecules, such as H2O, O2, CO2 and N2, for fuel generation. Contributions of original results (including reviews) from all approaches in devising and developing new materials, characterizations, and strategies that lead to enhance fundamental and applied insight, are particularly welcome. All areas of photocatalytic and photoelectrochemical semiconductor catalysis for fuel generations, based on experimental results and/or theoretical modelling, would be of interest.

Dr. Chong-Yong Lee
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Semiconductor
  • Photocatalysis
  • Photoelectrochemistry
  • Cocatalyst
  • Water splitting
  • Proton reduction
  • CO2 reduction
  • N2 reduction
  • Nanostructured
  • Solar fuels

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Published Papers (2 papers)

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Research

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9 pages, 2329 KiB  
Article
Ultrasonic-Assisted Synthesis of 2D α-Fe2O3@g-C3N4 Composite with Excellent Visible Light Photocatalytic Activity
by Huoli Zhang, Changxin Zhu, Jianliang Cao, Qingjie Tang, Man Li, Peng Kang, Changliang Shi and Mingjie Ma
Catalysts 2018, 8(10), 457; https://doi.org/10.3390/catal8100457 - 16 Oct 2018
Cited by 32 | Viewed by 5066
Abstract
In this study, α-Fe2O3@g-C3N4 photocatalyst was synthesized using an ultrasonic assisted self-assembly preparation method. The α-Fe2O3@g-C3N4 photocatalyst had a stronger optical absorption in the visible light region than pure [...] Read more.
In this study, α-Fe2O3@g-C3N4 photocatalyst was synthesized using an ultrasonic assisted self-assembly preparation method. The α-Fe2O3@g-C3N4 photocatalyst had a stronger optical absorption in the visible light region than pure graphitic carbon nitride (g-C3N4). The Z-Scheme heterojunction between α-Fe2O3 and g-C3N4 significantly inhibited the recombination of electrons and holes. The photocatalytic performances of α-Fe2O3@g-C3N4 photocatalyst were excellent in degradation of Rhodamine B (RhB) under visible light irradiation. The results indicated that 5 wt.% α-Fe2O3/g-C3N4 had the optimal photocatalytic activity because two-dimension (2D) α-Fe2O3 nanosheets can be well-dispersed on the surface of g-C3N4 layers by ultrasonic assisted treatment. A possible photocatalytic mechanism is also discussed. Full article
(This article belongs to the Special Issue Semiconductor Catalysis)
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Review

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37 pages, 5401 KiB  
Review
Metal Chalcogenides on Silicon Photocathodes for Efficient Water Splitting: A Mini Overview
by Jemee Joe, Hyunwoo Yang, Changdeuck Bae and Hyunjung Shin
Catalysts 2019, 9(2), 149; https://doi.org/10.3390/catal9020149 - 2 Feb 2019
Cited by 57 | Viewed by 10657
Abstract
In the photoelectrochemical (PEC) water splitting (WS) reactions, a photon is absorbed by a semiconductor, generating electron-hole pairs which are transferred across the semiconductor/electrolyte interface to reduce or oxidize water into oxygen or hydrogen. Catalytic junctions are commonly combined with semiconductor absorbers, providing [...] Read more.
In the photoelectrochemical (PEC) water splitting (WS) reactions, a photon is absorbed by a semiconductor, generating electron-hole pairs which are transferred across the semiconductor/electrolyte interface to reduce or oxidize water into oxygen or hydrogen. Catalytic junctions are commonly combined with semiconductor absorbers, providing electrochemically active sites for charge transfer across the interface and increasing the surface band bending to improve the PEC performance. In this review, we focus on transition metal (di)chalcogenide [TM(D)C] catalysts in conjunction with silicon photoelectrode as Earth-abundant materials systems. Surprisingly, there is a limited number of reports in Si/TM(D)C for PEC WS in the literature. We provide almost a complete survey on both layered TMDC and non-layered transition metal dichalcogenides (TMC) co-catalysts on Si photoelectrodes, mainly photocathodes. The mechanisms of the photovoltaic power conversion of silicon devices are summarized with emphasis on the exact role of catalysts. Diverse approaches to the improved PEC performance and the proposed synergetic functions of catalysts on the underlying Si are reviewed. Atomic layer deposition of TM(D)C materials as a new methodology for directly growing them and its implication for low-temperature growth on defect chemistry are featured. The multi-phase TM(D)C overlayers on Si and the operation principles are highlighted. Finally, challenges and directions regarding future research for achieving the theoretical PEC performance of Si-based photoelectrodes are provided. Full article
(This article belongs to the Special Issue Semiconductor Catalysis)
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