Special Issue "Photocatalytic Reduction of CO2"

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

Deadline for manuscript submissions: 30 June 2021.

Special Issue Editor

Dr. Martin Reli
E-Mail Website
Guest Editor
Institute of Environmental Technology, VŠB-TU Ostrava, 17. listopadu 15/2172, 708 00 Ostrava, Czech Republic
Interests: photocatalysis; CO2 photoreduction; hydrocarbon production

Special Issue Information

Dear Colleagues,

Carbon dioxide and its emissions represent a hot topic in global warming discussions. However, it also represents the most abundant source of carbon which is not utilized. The idea of conversion of carbon dioxide into other useful chemicals such as methanol or methane and their utilization as fuels could help with the world’s emerging energy shortage. Even though photocatalytic reduction of CO2 has been studied for many years, its exact reaction mechanism is not known, and even the reaction itself represents a challenge. This Special Issue collects original research papers, reviews, and commentaries focused on improving the knowledge of photocatalytic reduction of carbon dioxide, including new reactor design, novel photocatalysts, and especially understanding of reaction mechanisms.   

Dr. Martin Reli
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 papers will be 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 2000 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

  • Photocatalytic reduction of CO2
  • Reaction mechanism of CO2 photoreduction
  • Reactor design for CO2 photoreduction
  • CO2 to fuels
  • Hydrocarbon production from CO2

Published Papers (2 papers)

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Research

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Open AccessArticle
Photocatalytic H2 Evolution, CO2 Reduction, and NOx Oxidation by Highly Exfoliated g-C3N4
Catalysts 2020, 10(10), 1147; https://doi.org/10.3390/catal10101147 - 03 Oct 2020
Cited by 1 | Viewed by 687
Abstract
g-C3N4, with specific surface area up to 513 m2/g, was prepared via three successive thermal treatments at 550 °C in air with gradual precursor mass decrease. The obtained bulk and exfoliated (1ex, 2ex and 3ex) g-C3 [...] Read more.
g-C3N4, with specific surface area up to 513 m2/g, was prepared via three successive thermal treatments at 550 °C in air with gradual precursor mass decrease. The obtained bulk and exfoliated (1ex, 2ex and 3ex) g-C3N4 were characterized and tested as photocatalysts for H2 production, CO2 reduction and NOx oxidation. The exfoliated samples demonstrated graphene-like morphology with detached (2ex) and sponge-like framework (3ex) of layers. The surface area increased drastically from 20 m2/g (bulk) to 513 m2/g (3ex). The band gap (Eg) increased gradually from 2.70 to 3.04 eV. Superoxide radicals (·O2) were mainly formed under UV and visible light. In comparison to the bulk, the exfoliated g-C3N4 demonstrated significant increase in H2 evolution (~6 times), CO2 reduction (~3 times) and NOx oxidation (~4 times) under UV light. Despite the Eg widening, the photocatalytic performance of the exfoliated g-C3N4 under visible light was improved too. The results were related to the large surface area and low e-h+ recombination. The highly exfoliated g-C3N4 demonstrated selectivity towards H2 evolution reactions. Full article
(This article belongs to the Special Issue Photocatalytic Reduction of CO2)
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Review

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Open AccessReview
Layered Double Hydroxide (LDH) Based Photocatalysts: An Outstanding Strategy for Efficient Photocatalytic CO2 Conversion
Catalysts 2020, 10(10), 1185; https://doi.org/10.3390/catal10101185 - 14 Oct 2020
Cited by 3 | Viewed by 890
Abstract
CO2 conversion to solar fuels/chemicals is an alluring approach for narrowing critical issues of global warming, environmental pollution, and climate change, caused by excess atmospheric CO2 concentration. Amongst various CO2 conversion strategies, photocatalytic CO2 conversion (PCC) is considered as [...] Read more.
CO2 conversion to solar fuels/chemicals is an alluring approach for narrowing critical issues of global warming, environmental pollution, and climate change, caused by excess atmospheric CO2 concentration. Amongst various CO2 conversion strategies, photocatalytic CO2 conversion (PCC) is considered as a promising approach, which utilizes inexpensive sunlight and water with a photocatalyst material. Hence, development of an efficient and a stable photocatalyst is an essential activity for the respective scientific community to upscale the PCC research domain. Until today, metal oxides, such as TiO2, ZnO, etc., are categorized as standard photocatalysts because of their relative stability, abundant availability and low cost. However, their performance is tethered by limited light absorption and somewhat physical properties. Recently, layered double hydroxides (LDHs) have offered an exciting and efficient way for PCC due to their superb CO2 adsorption and moderate photocatalytic properties. The LDH based photocatalysts show marvelous physiochemical and electrical properties like high surface area, stability, and excellent conductivity. In the present review article, a summarized survey is portrayed regarding latest development for LDH based photocatalysts with a focus on synthesis strategies employing various photocatalyst materials, influencing parameters and possible mechanism involved in PCC to useful fuels and chemicals like CO, CH4, CH3OH, and H2. Full article
(This article belongs to the Special Issue Photocatalytic Reduction of CO2)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Title: Layered Double Hydroxide (LDH) based heterojunctioned photocatalysts: An Outstanding Strategy for Efficient Photocatalytic CO2 Conversion

인수일 <[email protected]>

Abstract: Conversion of CO2 to solar fuels/chemicals is an alluring approach for the minimization the critical issues of global warming, environmental pollution, and climatic changes, induced by increased level of atmospheric CO2. In addition such conversion also benefits in term of energy chemicals, hence holding a great potential to overcome the energy crisis. Amongst various CO2 conversion strategies, photocatalytic CO2 conversion (PCC), is considered as one of the effective and sustainable approach, utilizing sunlight as a free energy source with a photocatalyst material to convert moist CO2 to useful products. Hence, development of promising and efficient photocatalysts is an essential activity for the respective scientific community to upgrade and boost the PCC research domain. Until today, metal oxides such as TiO2, ZnO etc. are categorized as standard photocatalysts because of their stabilty, abundant availability, and cheaper material. However, their performance is tethered by limited light absorption and somewhat physical properties. To overcome such barriers, recently, layered double hydroxide (LDH) offers an exciting and efficient way for PCC due to their superb adsorption and moderate photocatalytic. Several strategies like metals and non-metals doping, surface modification and nanostructures formation for LDH photocatalytic materials have been investigated. The strategy of LHD based hetero-junctions and composite photocatalysts shows an extraordinary physiochemical and electrical properties like high surface area, stability, anticorrosion capacity, photosensitizer, and excellent conductivity. Hence, LDH based hetero-junctioned photocatalysts can be an excellent approach come up with an extra ordinary performance in the field of PCC. In the present review article, a summarized survey is portrayed regarding the latest development for LDH based hetero-junctioned photocatalysts with focus of hetero-junction formation with various photocatalysts materials, influencing parameters and possible mechanism involved thereof in PCC to useful fuels and chemicals like CO, CH4, CH3OH, etc.

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