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Emerging Catalytic Materials and Environmental Applications

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

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 1413

Special Issue Editors


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Guest Editor
Ruđer Bošković Institute, Bijenička Cesta 54, 10000 Zagreb, Croatia
Interests: nanostructured materials; metal oxides; structural characterization; photocatalysis; photovoltaics; physics
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Faculty of Geotechnical Engineering, Department for Environmental Engineering, University of Zagreb, Hallerova Aleja 7, HR-42000 Varaždin, Croatia
Interests: advanced oxidation processes, water and wastewater treatment; environmental photocatalysis; chemical engineering; chemical kinetics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Current main global concerns are excess emission of greenhouse gases and the growth of environmental pollution by organic compounds arising from many industrial, agricultural and urban human activities. Different materials have been widely studied in academic research and used in a variety of advanced catalytic applications, including the removal of organic pollutants and pathogens, water splitting, CO2 reduction, etc. However, the limited application of catalytic processes for environmental remediation at larger scales is related to limitations of the techniques, including the low quantum efficiency of commercial catalysts and high energy consumption. Therefore, synthesis and study of innovative and highly active materials for catalytic processes, including photo-catalytic, electro-photocatalytic, and electrocatalytic processes, are needed.

This Special Issue Emerging Photocatalytic Materials and Environmental Applications covers the design, preparation, characterization, and catalytic performances of entirely new catalytic materials as well as the study of different modifications of known catalysts which will show enhanced performances in environmental applications. The articles relating to the study of various forms of catalytic materials and their composites (such as porous materials, nanoparticles, nanofibers, nanorods, nanowires, thin film, etc.) are welcome. We invite authors to contribute with original articles as well as review articles comprising experimental approach and/or theoretical modelling with emphasis on materials for environmental remediation.

Dr. Andreja Gajović
Dr. Ivana Grčić
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.

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Keywords

  • new materials
  • material preparation
  • characterization
  • catalytic performances
  • theoretical modelling

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Published Papers (1 paper)

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Research

16 pages, 6280 KiB  
Article
Green Synthesis of ZnO/SnO2 Hybrid Nanocomposite for Degradation of Cationic and Anionic Dyes under Sunlight Radiation
by Naaser A. Y. Abduh and Abdel-Basit Al-Odayni
Materials 2023, 16(23), 7398; https://doi.org/10.3390/ma16237398 - 28 Nov 2023
Cited by 1 | Viewed by 1140
Abstract
The aim of this work was to biosynthesize SnO2-decorated ZnO (ZT) nanocomposites (NCs) of different Sn content (10, 20, and 30 mol%), namely, ZT10, ZT20, and ZT30, using Olea europaea leaf aqueous extract-based phytocompounds as nanoparticle facilitating agents for application as [...] Read more.
The aim of this work was to biosynthesize SnO2-decorated ZnO (ZT) nanocomposites (NCs) of different Sn content (10, 20, and 30 mol%), namely, ZT10, ZT20, and ZT30, using Olea europaea leaf aqueous extract-based phytocompounds as nanoparticle facilitating agents for application as effective photocatalyst in the removal of dyes from polluted water. The obtained ZT NCs were characterized using various techniques, including FTIR, XRD, TGA, TEM, EDS, UV–Vis, PL, and BET surface area. X-ray diffraction patterns show that rutile SnO2 and hexagonal ZnO coexist in the composites, and their crystallite size (D) is affected by the SnO2 ratio; the obtained D-values were 17.24, 19.07, 13.99, 6.45, and 12.30 nm for ZnO, SnO2, ZT10, ZT20, and ZT30, respectively. The direct band gaps of the ZT heterostructure increase with increasing SnO2 ratio (band gap = 3.10, 3.45, 3.14, 3.17, and 3.21 eV, respectively). TEM spectroscopy revealed nanorod and spherical grain morphologies of the composites, while EDS confirmed the elemental composition, the element ratio, and the composite’s purity. All catalysts exhibit type III isotherm with macropore structure. The photocatalytic efficiency against cationic (methylene blue (MB), rhodamine B (RB)), and anionic (methyl orange (MO)) dyes, under sunlight, was optimal with ZT20. The results revealed almost complete degradation at 55, 65, and 55 min, respectively. Hence, it is evident that incorporating SnO2 improves the photocatalyst’s performance, with an apparent optimal enhancement at 20 mol% Sn decorating ZT NCs. More interestingly, the catalyst stability and activity remained unaffected even after four activating cycles. Full article
(This article belongs to the Special Issue Emerging Catalytic Materials and Environmental Applications)
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