Editorial Board Members’ Collection Series: Photocatalytic Nanomaterials

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: 30 April 2024 | Viewed by 2563

Special Issue Editors


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Guest Editor
Embrapa Instrumentação, 1452 XV de Novembro Street, São Carlos 13560-970, Brazil
Interests: photocatalysis; photoelectrocatalysis; water decontamination; CO2 photoreduction; CH4 photooxidation

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Guest Editor
Department of Engineering for Innovation, University of Salento, Via Monteroni, 73100 Lecce, Italy
Interests: functional green materials and processes; materials from renewables; nanomaterials; (photo)catalysis; organic/inorganic hybrids
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to announce this Special Issue titled “Editorial Board Members’ Collection Series: Photocatalytic Nanomaterials”. This issue will comprise a collection of research papers invited by the Editorial Board members with the aim of covering all aspects of photocatalytic nanomaterials systems. To this end, we are inviting the submission of experimental and theoretical contributions within the scope of this Special Issue, including original research papers, short communications, and review articles. All papers will be fully open access upon publication after completing peer review.

Dr. Caue Ribeiro
Prof. Dr. Giuseppe Mele
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. Catalysts is an international peer-reviewed open access monthly 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

  • photocatalysts
  • photocatalytic nanomaterials
  • organic/inorganic hybrids
  • photoelectrocatalysis
  • water decontamination
  • photocatalytic CO2 reduction

Published Papers (1 paper)

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Research

23 pages, 6498 KiB  
Article
Synthesis of Ce and Sm Co-Doped TiO2 Nanoparticles with Enhanced Photocatalytic Activity for Rhodamine B Dye Degradation
by Yassine Slimani, Munirah A. Almessiere, Mohamed J. S. Mohamed, Essia Hannachi, Serkan Caliskan, Sultan Akhtar, Abdulhadi Baykal and Mohammed A. Gondal
Catalysts 2023, 13(4), 668; https://doi.org/10.3390/catal13040668 - 29 Mar 2023
Cited by 10 | Viewed by 2281
Abstract
One of the major concerns that receive global attention is the presence of organic pollutants (dyes, pharmaceuticals, pesticides, phenolic compounds, heavy metals, and so on), originating from various industries, in wastewater and water resources. Rhodamine B is widely used in the dyeing of [...] Read more.
One of the major concerns that receive global attention is the presence of organic pollutants (dyes, pharmaceuticals, pesticides, phenolic compounds, heavy metals, and so on), originating from various industries, in wastewater and water resources. Rhodamine B is widely used in the dyeing of paints, plastics, textiles, and other fabrics, as well as biological products. It is highly persistent, toxic, and carcinogenic to organisms and humans when directly released into the water supply. To avoid this hazard, several studies have been conducted in an attempt to remove Rhodamine B from wastewater. Metal oxide semiconducting materials have gained great interest because of their ability to decompose organic pollutants from wastewater. TiO2 is one of the most effective photocatalysts with a broad range of applications. Several attempts have been made to improve its photocatalytic activity. Accordingly, we have prepared in this work a series of cerium (Ce) and samarium (Sm) co-doped TiO2 nanoparticles (x = 0.00, 0.25, 0.50, 1.00, and 2.00%) using a sol–gel auto-combustion approach. The influence of Ce–Sm concentrations on the structural, morphology, electronic, and optical properties, as well as the photocatalytic activity, was investigated. Structure and elemental mapping analyses proved the presence of Ce and Sm in the compositions as well as the development of the TiO2 anatase phase with a tetragonal structure and crystallite size of 15.1–17.8 nm. Morphological observations confirmed the creation of spherical nanoparticles (NPs). The examination of the electronic structure properties using density functional theory (DFT) calculations and of the optical properties using a UV/Vis diffuse spectrophotometer showed a reduction in the bandgap energy upon Ce–Sm co-doping. The photocatalytic activity of the synthesized products was assessed on the degradation of Rhodamine B dye, and it was found that all Ce–Sm co-doped TiO2 nanoparticles have better photocatalytic activities than pristine TiO2 nanoparticles. Among all of the prepared nanoparticles, the sample with x = 0.50% demonstrated the best photocatalytic activity, with a degradation efficiency of 98% within 30 min and a reaction rate constant of about 0.0616 min−1. h+ and •O2 were determined to be the most important active species in the photocatalytic degradation process. Besides the high photocatalytic degradation efficiency, these photocatalysts are highly stable and could be easily recovered and reused, which indicates their potential for practical applications in the future. Full article
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