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Applied Sciences
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Photochemical and Future Energy Technologies
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Photochemical and Future Energy Technologies

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (20 June 2024) | Viewed by 4342

Special Issue Editors

Prof. Dr. Raffaele Marotta

E-Mail Website
Guest Editor
Department of Chemical Engineering, Materials and Industrial Production, University of Naples Federico II, Corso Umberto I, 40, 80138 Napoli, NA, Italy
Interests: solar photocatalysis; green chemistry; hydrogen solar production; advanced oxidation processes; kinetic modelling
Special Issues, Collections and Topics in MDPI journals
Dr. Marica Muscetta

E-Mail Website
Guest Editor
Department of Chemical Engineering, Materials and Industrial Production, University of Naples Federico II, 80138 Napoli, Italy
Interests: photocatalysis; heterogeneous photocatalysis; metal recovery; leaching; photocatalytic hydrogen production; solar photoreforming; wastewater treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear colleagues,

Over the past twenty years, there has been growing interest in the use of renewable energy sources to address global warming, environmental pollution, and the shortage of fossil fuels. Among the different renewable energy supplies, sunlight represents the most abundant on the Earth’s surface, gaining much attention recently. However, low energy efficiency and weather dependence represent, at present, the most limiting drawbacks for solar-based systems.

This Special Issue invites authors to submit research papers or reviews addressing topics related to photochemical and, more generally, future energy technologies.

Potential topics of interest for this Special Issue include, but are not limited to, the following aspects:

  • Solar-active materials for energy production
  • Reviews on solar-based systems for energy production
  • New materials in photoelectrochemical devices
  • Hydrogen production through advanced technologies
  • Reactor design in sustainable energy technology
  • Application of new energy technologies
  • New prospects on hydrogen storage

Prof. Dr. Raffaele Marotta
Dr. Marica Muscetta
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. Applied Sciences 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 2400 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

  • solar energy
  • photochemical technologies
  • hydrogen storage
  • hydrogen production
  • photoelectrochemical devices
  • renewable energy production
  • sustainable technologies

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Published Papers (2 papers)

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Research

11 pages, 1032 KiB  
Article
Investigation of the Superoxide Anion-Triggered Chemiluminescence of Coelenterazine Analogs
by El Hadi Erbiai, Patricia González-Berdullas, Joaquim C. G. Esteves da Silva and Luís Pinto da Silva
Appl. Sci. 2023, 13(11), 6617; https://doi.org/10.3390/app13116617 - 29 May 2023
Cited by 2 | Viewed by 1476
Abstract
Reactive oxygen species (ROS), including superoxide anion, are involved in regulating various signaling pathways and are also responsible for oxidative stress. Sensing superoxide anion is of particular importance due to its biological significance. One potential approach is to use Coelenterazine as a chemiluminescent [...] Read more.
Reactive oxygen species (ROS), including superoxide anion, are involved in regulating various signaling pathways and are also responsible for oxidative stress. Sensing superoxide anion is of particular importance due to its biological significance. One potential approach is to use Coelenterazine as a chemiluminescent probe for the dynamic sensing of this ROS. In this study, we investigated the superoxide anion-triggered chemiluminescence of native Coelenterazine and two halogenated analogs and found that they showed a ~100-fold enhancement of light emission in aqueous solution, which was significantly reduced in methanol and nonexistent in aprotic solvents. In fact, Coelenterazine showed more intense light emission in aprotic solvents and, interestingly, although the light emission of the analogs seemed relatively unaffected by the solvents, their chemiluminescence was significantly quenched in water compared to methanol and, especially, to aprotic media. This suggests that the quenching effect observed for Coelenterazine is responsible for the differences in aqueous media, rather than an intrinsic enhanced emission by the analogs. In summary, we present Coelenterazine analogs that could serve as a basis for enhanced sensing of superoxide anion, providing information that could further our understanding of this chemiluminescent system. Full article
(This article belongs to the Special Issue Photochemical and Future Energy Technologies)
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15 pages, 3529 KiB  
Article
Visible—Light Driven Systems: Effect of the Parameters Affecting Hydrogen Production through Photoreforming of Organics in Presence of Cu2O/TiO2 Nanocomposite Photocatalyst
by Marica Muscetta, Laura Clarizia, Marco Race, Roberto Andreozzi, Raffaele Marotta and Ilaria Di Somma
Appl. Sci. 2023, 13(4), 2337; https://doi.org/10.3390/app13042337 - 11 Feb 2023
Cited by 4 | Viewed by 2017
Abstract
Several studies have shown that combining TiO2 and Cu2O enhances the photocatalytic activity of the material by generating a heterojunction capable of extending the light absorption in the visible and reducing the electron-hole recombination rate. Ball milling has been chosen [...] Read more.
Several studies have shown that combining TiO2 and Cu2O enhances the photocatalytic activity of the material by generating a heterojunction capable of extending the light absorption in the visible and reducing the electron-hole recombination rate. Ball milling has been chosen as an alternative methodology for photocatalyst preparation, among the several techniques documented in the literature review. The results of a previously reported investigation enabled the identification of the most effective photocatalyst that can be prepared for hydrogen generation by combining Cu2O and TiO2 (i.e., 1%wt. Cu2O in TiO2 photocatalyst prepared by ball-milling method at 200 rpm and 1 min milling time). To optimize photocatalytic hydrogen generation in the presence of the greatest photocatalyst, the effects of (i) sacrificial species and their concentration, (ii) temperature, and (iii) pH of the system are taken into account, resulting in a light-to-chemical energy efficiency of 8% under the best-tested conditions. Last but not least, the possibility of using the present photocatalytic system under direct solar light irradiation is evaluated: the results indicate that nearly 60% of the hydrogen production recorded under sunlight can be attributed to the visible component of the solar spectrum, while the remaining 40% can be attributed to the UV component. Full article
(This article belongs to the Special Issue Photochemical and Future Energy Technologies)
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