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Photocatalytic CO2 Reduction
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Photocatalytic CO2 Reduction

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: closed (31 July 2020) | Viewed by 12817

Special Issue Editors

Dr. Marcelo Guzman

E-Mail Website
Guest Editor
Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
Interests: environmental photochemistry; interfacial oxidations; environmental monitoring; prebiotic chemistry; photocatalytic CO2 reduction; environmental chemistry
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. German Mills

E-Mail Website
Guest Editor
Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, USA
Interests: synthesis of nanomaterials in nonpolar media; redox-active macroradicals for environmental remediation; photoadaptive polymer systems for control and sensing of chemicals

Special Issue Information

Dear Colleagues,

The photocatalytic reduction of CO2 is a focus of current attention to develop new technology for CO2 fixation and storage with the possible added value of creating fuels and synthetic precursors. Advances in the development of new photocatalytic materials are of special interest to this issue if they can demonstrate improvements in the photocatalytic activity. Innovative strategies for the photoreduction of CO2 inspired by the current knowledge of biological pathways are encouraged. This Special Issue aims to collect original research papers, reviews and commentaries focused on the photocatalytic transformation of CO2. Mechanistic research papers that study related photocatalytic reductions that could contribute to understanding the general process in order to improve the reduction of CO2 are also welcome. Although major contributions are expected to focus on heterogeneous photocatalysis, research based on the use of homogeneous photocatalysts will be considered. In summary, submissions are welcome especially (but not exclusively) in the following areas:

- Photocatalytic processes for the reduction of CO2

- Development of new photocatalysts with improved photoreduction activity

- Mechanisms for CO2 photoreduction

- Innovative processes and reactors for CO2 photocatalytic conversion

Prof. Dr. Marcelo I. Guzman
Prof. Dr. German Mills
Guest Editors

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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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

  • CO2 photoreduction
  • Heterogeneous photocatalysis
  • Artificial photosynthesis
  • CO2 capture
  • Fuel production

Published Papers (2 papers)

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Research

18 pages, 6285 KiB  
Article
Impact of Pd Loading on CO2 Reduction Performance over Pd/TiO2 with H2 and H2O
by Akira Nishimura, Tadaaki Inoue, Yoshito Sakakibara, Masafumi Hirota, Akira Koshio and Eric Hu
Molecules 2020, 25(6), 1468; https://doi.org/10.3390/molecules25061468 - 24 Mar 2020
Cited by 7 | Viewed by 3007
Abstract
This study investigated the impact of molar ratio of CO2 to reductants H2O and H2, as well as Pd loading weight on CO2 reduction performance with Pd/TiO2 as the photocatalyst. The Pd/TiO2 film photocatalyst is [...] Read more.
This study investigated the impact of molar ratio of CO2 to reductants H2O and H2, as well as Pd loading weight on CO2 reduction performance with Pd/TiO2 as the photocatalyst. The Pd/TiO2 film photocatalyst is prepared by the sol-gel and dip-coating process to prepare TiO2 film and the pulse arc plasma method is used to dope Pd on TiO2 film. The prepared Pd/TiO2 film was characterized by SEM, EPMA, STEM, EDS, and EELS. This study also investigated the performance of CO2 reduction under the illumination condition of Xe lamp with or without ultraviolet (UV) light. As a result, it is revealed that when the molar ratio of CO2/H2/H2O is set at 1:0.5:0.5, the best CO2 reduction performance has been obtained under the illumination condition of Xe lamp with and without UV light. In addition, it is found that the optimum Pd loading weight is 3.90 wt%. The maximum molar quantities of CO and CH4 produced per unit weight of photocatalyst are 30.3 μmol/g and 22.1 μmol/g, respectively, for the molar ratio of CO2/H2/H2O = 1:0.5:0.5 under the condition of Xe lamp illumination with UV light. With UV light, C2H4 and C2H6, as well as CO and CH4 are also produced by the Pd/TiO2 film photocatalyst prepared in this study. Full article
(This article belongs to the Special Issue Photocatalytic CO2 Reduction)
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11 pages, 2983 KiB  
Article
X-ray Photospectroscopy and Electronic Studies of Reactor Parameters on Photocatalytic Hydrogenation of Carbon Dioxide by Defect-Laden Indium Oxide Hydroxide Nanorods
by Joel Y. Y. Loh and Nazir P. Kherani
Molecules 2019, 24(21), 3818; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules24213818 - 23 Oct 2019
Cited by 43 | Viewed by 8461
Abstract
In the study reported herein, glovebox-protected X-ray photoelectron spectroscopy (XPS) and in situ Hall charge carrier measurements provide new insights into the surface physical chemistry of gaseous H2, CO2, and H2+CO2 combined with nanostructured In2 [...] Read more.
In the study reported herein, glovebox-protected X-ray photoelectron spectroscopy (XPS) and in situ Hall charge carrier measurements provide new insights into the surface physical chemistry of gaseous H2, CO2, and H2+CO2 combined with nanostructured In2O(3−x)(OH)y nanorods, which ensue under photochemical and thermochemical operating conditions. Heterolytic dissociation of H2 in H2-only atmosphere appears to occur mainly under dark and ambient temperature conditions, while the greatest amount of OH shoulder expansion in H2+CO2 atmosphere appears to mainly occur under photoilluminated conditions. These results correlate with those of the Hall measurements, which show that the prevalence of homolytic over heterolytic dissociation at increasing temperatures leads to a steeper rate of increase in carrier concentrations; and that H2 adsorption is more prevalent than CO2 in H2+CO2 photoillumination conditions. Full article
(This article belongs to the Special Issue Photocatalytic CO2 Reduction)
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