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Materials
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Advanced Catalytic and Adsorbent Materials for a Greener World
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Advanced Catalytic and Adsorbent Materials for a Greener World

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Green Materials".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 1540

Special Issue Editors

Prof. Dr. Ioan-Cezar Marcu

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Guest Editor
Laboratory of Chemical Technology and Catalysis, University of Bucharest, 4-12, Blv. Regina Elisabeta, 030018 Bucharest, Romania
Interests: heterogeneous catalysis; catalysis by metal oxides; semiconducting metal oxides; layered double hydroxides and related materials; catalytic oxidation
Special Issues, Collections and Topics in MDPI journals
Dr. Ionel Popescu

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Guest Editor
Division of Exact Sciences, Research Institute of the University of Bucharest (ICUB), 90 Panduri Street, 050663 Bucharest, Romania
Interests: heterogeneous catalysis; catalysis by metal oxides; semiconducting metal oxides; layered double hydroxides; catalytic oxidation

Special Issue Information

Dear Colleagues,

This Special Issue collects original research papers, short communications, and reviews focused on the development and application of novel or optimized materials as catalysts and adsorbents in processes of green chemistry, clean energy production, and pollution control. We welcome both experimental and computational works, at both fundamental and applied levels, involving the preparation and characterization of a broad range of materials, including nanostructured, hierarchical, and hybrid materials, together with the investigation of their catalytic and adsorptive properties in environmentally friendly and green energy processes, including green synthesis, hydrogen energy, waste recovery and valorization, and pollution abatement.

Prof. Dr. Ioan-Cezar Marcu
Dr. Ionel Popescu
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. Materials 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 2600 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

  • catalyst
  • adsorbent
  • microporous materials
  • mesoporous materials
  • green synthesis
  • sustainable technologies
  • green energy
  • recovery technologies
  • environmental protection
  • waste valorization

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Published Papers (1 paper)

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Research

16 pages, 9082 KiB  
Article
Improved Photocatalytic Activity of Dion–Jacobson-Type Tantalate Perovskites Modified with FeCl2
by Monica Pavel, Crina Anastasescu, Irina Atkinson, Florica Papa and Ioan Balint
Materials 2024, 17(19), 4862; https://doi.org/10.3390/ma17194862 - 2 Oct 2024
Viewed by 1126
Abstract
A rapid and feasible approach was used to develop visible-light-driven-type Dion–Jacobson perovskites by the modification of the RbLaTa2O7 host (RbLTO) with FeCl2 through the molten salt route. X-ray diffraction (XRD) characterization showed that FeCl2-modified layered perovskite (e.g., [...] Read more.
A rapid and feasible approach was used to develop visible-light-driven-type Dion–Jacobson perovskites by the modification of the RbLaTa2O7 host (RbLTO) with FeCl2 through the molten salt route. X-ray diffraction (XRD) characterization showed that FeCl2-modified layered perovskite (e.g., Fe@RbLTO) preserved its lamellar structure. SEM micrographs confirmed the layered morphology of both RbLTO and Fe@RbLTO perovskite materials. The UV-Vis spectra illustrated a significant red shift of the absorption edge after Fe2+ modification, with the band gap energy reducing from 3.88 to 1.82 eV. H2-TPR measurements emphasized the anchorage of Fe2+ species located on the surface of the layered perovskite as well as in the interlayer space. The synthesized materials were valorized as photocatalysts for the degradation of phenol under both Xe lamp and simulated solar irradiation (SSL) conditions. The photocatalytic reaction follows first-order kinetics. By-product formations during phenol (Ph) degradation were identified and quantified using high-performance liquid chromatography (HPLC). Hydroquinone, 1,2-dihydroxi-benzene, benzoquinone, and pyrogallol were identified as the main Ph degradation intermediates. Pristine RbLaTa2O7 exhibited a phenol conversion value of about 17% using an Xe lamp, while a ≈ 11% conversion was achieved under SSL. A substantial increase in Ph conversion and selectivity was perceived after Fe2+ modification. Fe@RbLTO demonstrated superior photocatalytic performances (43% conversion of phenol under an Xe lamp, and 91% selectivity to aromatic intermediate compounds) at optimized reaction conditions. The stability of the Fe@RbLTO photocatalyst when exposed to an Xe lamp was also assessed. These results suggest that the existence of iron species on the layered perovskite’s surface is responsible for the improved redox properties of Fe@RbLTO, resulting in a valuable material for environmental applications. Full article
(This article belongs to the Special Issue Advanced Catalytic and Adsorbent Materials for a Greener World)
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