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Nanomaterials in Photochemical Devices: Advances and Applications

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

Deadline for manuscript submissions: 31 December 2025 | Viewed by 410

Special Issue Editor


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Guest Editor
Department of Electronic Engineering, Universidad Carlos III de Madrid (UC3M), Madrid, Spain
Interests: optical sensors; light scattering; solar cells; resonant nanostructures; metamaterials; liquid crystal-based sensors
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Special Issue Information

Dear Colleagues,

The integration of nanomaterials in photochemical devices has revolutionized various sectors, including energy, environmental, and biomedical applications. Recent advancements have demonstrated the immense potential of these materials in enhancing the efficiency and functionality of photochemical processes.

Photochemical synthesis has emerged as a promising method for producing metallic nanoparticles, offering advantages such as room temperature operation, simple equipment requirements, and reduced environmental impact. Gold and silver nanoparticles have particularly garnered significant attention due to their unique physicochemical properties and versatile applications in biomedicine, catalysis, and electronics. In the realm of environmental applications, metal oxide-based nanomaterials have shown remarkable efficacy in the photocatalytic degradation of pollutants. Materials such as TiO2, ZnO, and CuO have demonstrated high photocatalytic activity, making them valuable for wastewater treatment and environmental remediation. The biomedical field has also benefited greatly from photo-responsive nanomaterials. These materials have been employed in various diagnostic and therapeutic applications, including photodynamic therapy, photothermal therapy, and bioimaging. Polymer-based nanocarriers have been also developed to encapsulate photosensitizers, addressing issues of toxicity and improving targeted delivery. Carbon nanomaterials have shown promise in photoacoustic imaging, leveraging their unique physical and electrochemical properties. This emerging technique offers new possibilities for non-invasive medical diagnostics and research.

We welcome original research articles, review papers, and short communications that address various aspects of nanomaterials in photochemical devices, including (but not limited to) the following:

  • Novel synthesis methods for photo-responsive nanomaterials.
  • The characterization and manipulation of photochemical nanoparticles.
  • Applications in energy conversion and storage.
  • Environmental remediation using photocatalytic nanomaterials.
  • Biomedical applications of photo-triggered nanomaterials.
  • Advances in photoacoustic imaging using nanomaterials.
  • The theoretical modeling and simulation of nanomaterial-based photochemical processes.

Dr. Braulio García-Cámara
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. 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

  • nanomaterials
  • photochemistry
  • photocatalysis
  • nanoparticles
  • energy conversion
  • environmental remediation
  • biomedical applications
  • photoacoustic imaging

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Published Papers (1 paper)

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Research

23 pages, 4361 KiB  
Article
Novel Visible Light-Driven Ho2InSbO7/Ag3PO4 Photocatalyst for Efficient Oxytetracycline Contaminant Degradation
by Jingfei Luan and Tiannan Zhao
Molecules 2025, 30(15), 3289; https://doi.org/10.3390/molecules30153289 - 6 Aug 2025
Viewed by 272
Abstract
In this study, a Z-scheme Ho2InSbO7/Ag3PO4 (HAO) heterojunction photocatalyst was successfully fabricated for the first time by ultrasound-assisted solvothermal method. The structural features, compositional components and morphological characteristics of the synthesized materials were thoroughly characterized by [...] Read more.
In this study, a Z-scheme Ho2InSbO7/Ag3PO4 (HAO) heterojunction photocatalyst was successfully fabricated for the first time by ultrasound-assisted solvothermal method. The structural features, compositional components and morphological characteristics of the synthesized materials were thoroughly characterized by a series of techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectrum, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy. A comprehensive array of analytical techniques, including ultraviolet-visible diffuse reflectance absorption spectra, photoluminescence spectroscopy, time-resolved photoluminescence spectroscopy, photocurrent testing, electrochemical impedance spectroscopy, electron paramagnetic resonance, and ultraviolet photoelectron spectroscopy, was employed to systematically investigate the optical, chemical, and photoelectronic properties of the materials. Using oxytetracycline (OTC), a representative tetracycline antibiotic, as the target substrate, the photocatalytic activity of the HAO composite was assessed under visible light irradiation. Comparative analyses demonstrated that the photocatalytic degradation capability of the HAO composite surpassed those of its individual components. Notably, during the degradation process, the application of the HAO composite resulted in an impressive removal efficiency of 99.89% for OTC within a span of 95 min, along with a total organic carbon mineralization rate of 98.35%. This outstanding photocatalytic performance could be ascribed to the efficient Z-scheme electron-hole separation system occurring between Ho2InSbO7 and Ag3PO4. Moreover, the adaptability and stability of the HAO heterojunction were thoroughly validated. Through experiments involving the capture of reactive species and electron paramagnetic resonance analysis, the active species generated by HAO were identified as hydroxyl radicals (•OH), superoxide anions (•O2), and holes (h+). This identification provides valuable insights into the mechanisms and pathways associated with the photodegradation of OTC. In conclusion, this research not only elucidates the potential of HAO as an efficient Z-scheme heterojunction photocatalyst but also marks a significant contribution to the advancement of sustainable remediation strategies for OTC contamination. Full article
(This article belongs to the Special Issue Nanomaterials in Photochemical Devices: Advances and Applications)
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