Current Advances on Applications of Optics and Photonics – Selected Papers from the 6th International Conference on Applications of Optics and Photonics, AOP2024

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: 31 January 2025 | Viewed by 1282

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Center of Physics of the Universities of Minho and Porto, School of Sciences, University of Minho, 4710-057 Braga, Portugal
Interests: optical metrology; image processing; thin films, micro- and nanostructures and systems; optics and science education
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School of Industrial Engineering, University of Vigo, Vigo, Spain
Interests: applied optics; photonics; optical engineering; hands-on science; science education; training of teachers; sustainability
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Special Issue Information

Dear Colleagues,

The 6th International Conference on Applications of Optics and Photonics, AOP2024, will be held in Aveiro (Portugal), 16–19 July, 2024. Since its first edition back in 2011, the AOP conference has provided an excellent opportunity to, in an open friendly environment, foster the establishment of the widest range of cooperation projects and relationships with colleagues and institutions involved in optics and photonics research from all around the world. Open to contributions in all domains of optics and photonics and application fields, with this conference we expect to review the state-of-the art in these subjects and to foresee and discuss the future of research in optics and photonics.

We are honored to serve as Guest Editors of this Special Issue to be published in Photonics that will contain a selection of papers submitted and accepted at AOP2024. Its main scope is to provide a timely and broad collection of the most innovative topics discussed at the latest edition of the conference related to applications optics and photonics. We warmly invite researchers to submit their contributions, both original research articles and review papers, to this Special Issue. Topics include, but are not limited to:

  • Nano-photonics;
  • Plasmonics;
  • Theoretical optics, quantum and nonlinear optics;
  • Optical communications and sensors;
  • Optical fibers and applications;
  • Biophotonics and biomedical and medical applications of optics & photonics;
  • Ultrafast lasers and ultrafast optics;
  • Power lasers;
  • Optical metrology, image processing and industrial applications;
  • Optometry, ophthalmic optics, color and visual sciences;
  • Optoelectronics;
  • Microwave photonics;
  • Photonics and optical instrumentation for space and astronomy;
  • Optics and photonics for smart mobility and smart cities.

Dr. Manuel Filipe P. C. M. Costa
Dr. José Benito Vázquez Dorrío
Guest Editors

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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. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

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Published Papers (1 paper)

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12 pages, 4334 KiB  
Article
Iron-Modified Nano-TiO2: Comprehensive Characterization for Enhanced Photocatalytic Properties
by Élida M. Margalho, Orlando Lima, Jr., Cátia Afonso, Iran Rocha Segundo, Salmon Landi, Jr., Elisabete Freitas, Manuel F. M. Costa and Joaquim Carneiro
Photonics 2024, 11(9), 888; https://doi.org/10.3390/photonics11090888 - 20 Sep 2024
Viewed by 605
Abstract
This study investigates the effect of iron-modified nano-TiO2, using the co-precipitation method with different concentrations of FeCl3 (0.1, 1, and 10%), to improve its photocatalytic properties for outdoor applications. To this end, modified and unmodified nano-TiO2 were characterized using [...] Read more.
This study investigates the effect of iron-modified nano-TiO2, using the co-precipitation method with different concentrations of FeCl3 (0.1, 1, and 10%), to improve its photocatalytic properties for outdoor applications. To this end, modified and unmodified nano-TiO2 were characterized using different techniques. The optical properties were characterized by diffuse reflectance spectroscopy (DRS) followed by band gap calculation. X-ray diffraction (XRD) was used to analyze the crystalline structure. Chemical and morphological characterization were carried out using energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM). The photocatalytic activity was investigated by decolorizing Rhodamine B aqueous solutions under similar sunlight irradiation. The results indicate that the modification improved light absorption in the UV range for all iron concentrations; however, only the concentration of TiO2: FeCl3 (10%) shifted the absorption to the visible region. Also, including Fe3⁺ in TiO2 decreased the band gap energy from 3.14 to up to 2.80 eV. There were variations in crystallite size from 21.13 to up to 40.07 nm. The nano-TiO2 morphology analysis showed that it did not change after iron modification. EDS showed an FeCl3 peak only at higher concentrations (10%). In addition, the 0.1% Fe-modified TiO2 exhibited the highest activity in the photocatalytic process, with an efficiency of 95.23% after 3 h of irradiation. Full article
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