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Special Issue "Solar Chemicals Production and Environmental Remediation with Semiconductor/Carbon Photocatalysts"

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

Deadline for manuscript submissions: 30 June 2019

Special Issue Editors

Guest Editor
Prof. Dr. Juan Matos Lale

Head of Hybrid and Carbon Materials Group, Bioenergy Departament, Technological Development Unit (UDT), University of Concepcion, Concepcion, Chile
Website | E-Mail
Interests: photocatalysis; carbon materials; hybrid materials; solar irradiation; solar/chemical fuels
Guest Editor
Dr. Alicia Gomis Berenguer

CEMHTI Site Haute Température, CNRS (UPR 3079), 1D Av. de la Recherche Scientifique CS 90055, 45071 - Orléans Cedex 2, France
Website | E-Mail
Interests: photochemistry; photoelectrochemistry; nanoporous carbons; adsorption; carbon/ligth interactions; energy conversion; advanced oxidation processes

Special Issue Information

Dear Colleagues,

One of the main challenges of a global energy strategy is the development of new sustainable fuels and chemicals based on renewable energies. Solar fuels and chemicals are promising strategic pathways since they are produced from simple and abundant molecules using a renewable energy source such as sunlight. However, although the scientific and technological achievements reached to date have been many, the efficiency is still low and far for the practical application. Thus, highly active photocatalysts are required to produce solar and chemical fuels.

The purpose of this Special Issue, entitled “Solar Chemicals Production and Environmental Remediation with Semiconductor/Carbon Photocatalysts” is to cover significant recent advances in the area of solar chemicals, also referred to as solar-driven chemical reactions, using advanced oxidation/reduction processes through the development of efficient semiconductor/carbon-based photocatalysts. Works related with the eco-friendly synthesis routes of innovative carbon-based photocatalysts for the production of energy vectors like H2 or other fuels, CO2 reduction, photo-assisted valorization of organic molecules, and the environmental remediation of polluted water and air are welcome to be submitted to this Special Issue.

Prof. Dr. Juan Matos Lale
Dr. Alicia Gomis Berenguer
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 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. 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 1800 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

  • Photochemistry
  • Energy conversion
  • Semiconductor/Carbon material
  • Solar chemicals

Published Papers (2 papers)

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Research

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Open AccessArticle
Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater
Molecules 2019, 24(7), 1373; https://doi.org/10.3390/molecules24071373
Received: 27 March 2019 / Revised: 5 April 2019 / Accepted: 6 April 2019 / Published: 8 April 2019
PDF Full-text (1890 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of [...] Read more.
We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of thiocyanates, regardless of the illumination conditions, the effect being more pronounced in the absence of a photocatalyst. This is due to their different degradation mechanism that in the case of thiocyanates is dominated by fast recombination reactions and/or charge transfer reactions to electron scavengers. In all cases, cyanate, ammonia, nitrates, and nitrites were formed at different amounts depending on the illumination conditions. The conversion yield under simulated solar light was almost complete for cyanides and quite high for thiocyanates after 6 h of illumination. Regarding toxicity, photochemical oxidation at 254 nm and under simulated solar light decreased significantly the toxicity of the pristine wastewater, showing a correlation with the intensity of the irradiation source. This indicate that simulated light can be effectively used to reduce the toxicity of industrial effluents, opening an interesting perspective for optimizing cyanide detoxification systems based on natural light. Full article
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Review

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Open AccessReview
Graphene-Based Materials as Efficient Photocatalysts for Water Splitting
Molecules 2019, 24(5), 906; https://doi.org/10.3390/molecules24050906
Received: 31 January 2019 / Revised: 26 February 2019 / Accepted: 28 February 2019 / Published: 5 March 2019
Cited by 1 | PDF Full-text (4923 KB) | HTML Full-text | XML Full-text
Abstract
Photocatalysis has been proposed as one of the most promising approaches for solar fuel production. Among the photocatalysts studied for water splitting, graphene and related materials have recently emerged as attractive candidates due to their striking properties and sustainable production when obtained from [...] Read more.
Photocatalysis has been proposed as one of the most promising approaches for solar fuel production. Among the photocatalysts studied for water splitting, graphene and related materials have recently emerged as attractive candidates due to their striking properties and sustainable production when obtained from biomass wastes. In most of the cases reported so far, graphene has been typically used as additive to enhance its photocatalytic activity of semiconductor materials as consequence of the improved charge separation and visible light harvesting. However, graphene-based materials have demonstrated also intrinsic photocatalytic activity towards solar fuels production, and more specifically for water splitting. The photocatalytic activity of graphene derives from defects generated during synthesis or their introduction through post-synthetic treatments. In this short review, we aim to summarize the most representative examples of graphene based photocatalysts and the different approaches carried out in order to improve the photocatalytic activity towards water splitting. It will be presented that the introduction of defects in the graphenic lattice as well as the incorporation of small amounts of metal or metal oxide nanoparticles on the graphene surface improve the photocatalytic activity of graphene. What is more, a simple one-step preparation method has demonstrated to provide crystal orientation to the nanoparticles strongly grafted on graphene resulting in remarkable photocatalytic properties. These two features, crystal orientation and strong grafting, have been identified as a general methodology to further enhance the photocatalytic activity in graphenebased materials for water splitting. Finally, future prospects in this filed will be also commented. Full article
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Figure 1

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.

Type: Article
Title: Bacterial inactivation on cocrete plates loaded with modified TiO2 photocatalysts under visible light irradiation
Author: Magdalena Janus
Affiliation: West Pomeranian University of Technology, Szczecin, Poland
Abstract: The concrete plates loaded with varied titania photocatalysts was investigated towards the antibacterial activity under visible light irradiation. The target in bacteria testing was E. coli K12. The presence of photocatalysts in concrete matrix in dose of 10 wt.% involved antibacterial properties, which rate was dependent on the type of photocatalyst (unmodified TiO2, TiO2-N and TiO2-N,C). A total inactivation of E. coli irradiated under UV-vis light was observed on the concrete plates loaded with following photocatalysts: TiO2/N,CMetOH-300, TiO2/N,CEtOH-100, TiO2/N,CisoPrOH-100 and TiO2/N-300. The presence of nitrogen and carbon in photocatalysts structure as well as crystallite size, surface area and porosity contributed to increase of antibacterial properties of concrete plates.
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