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Catalysts
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Advances in Supported Catalytic Nanomaterials
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Advances in Supported Catalytic Nanomaterials

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

Deadline for manuscript submissions: closed (20 February 2022) | Viewed by 6622

Special Issue Editors

Prof. Dr. Salam Titinchi

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Guest Editor
Department of Chemistry, University of the Western Cape, Cape Town 7535, South Africa
Interests: inorganic chemistry; catalysis; materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hanna Abbo

E-Mail Website
Guest Editor
1. Department of Chemistry, College of Science, University of Basrah, Basrah 61004, Iraq
2. Department of Chemistry, University of the Western Cape, Bellville, Cape Town 7535, South Africa
Interests: inorganic chemistry; catalysis; materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The role of catalytic nanomaterials in various catalysis applications is an important source of ‎inspiration in nanotechnology and catalysis.

The proposed thematic issue is dedicated to novel achievements in the field of supported ‎catalytic nanomaterials associated in environmental and energy-oriented catalysis, electro-‎catalysis, photo-catalysis, biocatalysis and surface science. ‎

The thematic issue is to help researchers focus on the most recent advances in the application of ‎supported catalytic materials and nanocatalysts.‎

This themed issue will feature papers by leading authors in the field, and focus on the design ‎and synthesis of new materials supported on different supports for various applications.

The contributions should be related to the listed topics: the design and development of

  • Electro catalysts, ‎
  • Photo catalysts,
  • Fuel-cell and ion-batteries catalysts,‎
  • Biocatalysts.

This issue could include review covering the impacts and inspiration of the new ‎supported nano-catalysts in these fields.

Prof. Dr. Salam Titinchi
Prof. Dr. Hanna Abbo
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

  • Electrocatalysts
  • Photocatalysts
  • Fuel-cell and ion-batteries catalysts
  • Biocatalysts

Published Papers (3 papers)

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Research

20 pages, 8282 KiB  
Article
Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue
by Adrien P. Yepseu, Thomas Girardet, Linda D. Nyamen, Solenne Fleutot, Kevin I. Y. Ketchemen, Franck Cleymand and Peter T. Ndifon
Catalysts 2022, 12(1), 61; https://doi.org/10.3390/catal12010061 - 6 Jan 2022
Cited by 5 | Viewed by 2082
Abstract
In this study, two copper(II) complexes, [Cu(C6H8N3S2)2]Cl2 (1) and [Cu(C7H10N3S2)2]Cl2·H2O (2), were synthesized from 2-(thiophen-2-ylmethylene)hydrazine-1-carbothioamide (L1H) [...] Read more.
In this study, two copper(II) complexes, [Cu(C6H8N3S2)2]Cl2 (1) and [Cu(C7H10N3S2)2]Cl2·H2O (2), were synthesized from 2-(thiophen-2-ylmethylene)hydrazine-1-carbothioamide (L1H) and 2-(1-(thiophen-2-yl)ethylidene)hydrazine-1-carbothioamide (L2H) respectively and characterized using various spectroscopic techniques and elemental analyses. The as-prepared complexes were used as single-source precursors for the synthesis of oleylamine-capped (OLA@CuxSy), hexadecylamine-capped (HDA@CuxSy), and dodecylamine-capped (DDA@CuxSy) copper sulphide nanoparticles (NPs) via the thermolysis method at 190 °C and 230 °C and then characterized using powder X-ray diffraction (p-XRD), UV-visible spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The p-XRD diffraction patterns confirmed the formation of crystalline rhombohedral digenite Cu9S5 with the space group R-3m. The TEM images showed the formation of nanoparticles of various shapes including hexagonal, rectangular, cubic, truncated-triangular, and irregularly shaped Cu9S5 nanomaterials. The SEM results showed aggregates and clusters as well as the presence of pores on the surfaces of nanoparticles synthesized at 190 °C. The UV-visible spectroscopy revealed a general blue shift observed in the absorption band edge of the copper sulphide NPs, as compared to bulk CuxSy, with energy band gaps ranging from 2.52 to 3.00 eV. Energy-dispersive X-ray spectroscopy (EDX) confirmed the elemental composition of the Cu9S5 nanoparticles. The nanoparticles obtained at 190 °C and 230 °C were used as catalysts for the photocatalytic degradation of methylene blue (MB) under UV irradiation. Degradation rates varying from 47.1% to 80.0% were obtained after 90 min of exposure time using only 10 mg of the catalyst, indicating that Cu9S5 nanoparticles have potential in the degradation of organic pollutants (dyes). Full article
(This article belongs to the Special Issue Advances in Supported Catalytic Nanomaterials)
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16 pages, 96617 KiB  
Article
Pd on the Composite of Perlite and Allylamine-N-isopropylacrylamide Copolymer: A Thermo-Responsive Catalyst for Hydrogenation of Nitroarenes under Mild Reaction Condition
by Neda Abedian-Dehaghani, Majid M. Heravi and Samahe Sadjadi
Catalysts 2021, 11(11), 1334; https://doi.org/10.3390/catal11111334 - 4 Nov 2021
Cited by 12 | Viewed by 1769
Abstract
A novel thermo-responsive catalyst for the hydrogenation of nitroarenes under mild reaction condition was devised. To prepare the catalyst, a thermo-responsive polymer was first synthesized through the co-polymerization of N-isopropylacrylamide and allylamine and then covalently grafted on the Cl-functionalized perlite. The resulting [...] Read more.
A novel thermo-responsive catalyst for the hydrogenation of nitroarenes under mild reaction condition was devised. To prepare the catalyst, a thermo-responsive polymer was first synthesized through the co-polymerization of N-isopropylacrylamide and allylamine and then covalently grafted on the Cl-functionalized perlite. The resulting composite was subsequently utilized as a support for the stabilization of Pd nanoparticles. Investigation of the catalytic activity of the catalyst approved its high catalytic activity at a temperature above the lower critical solution temperature. More precisely, 0.03 g of the catalyst can promote the reaction of 1 mmol of nitro-compounds in H2O/EtOH (1:1) at 45 °C to furnish the corresponding products in 70–100% yields. This issue was assigned to the collapse of the polymeric component and formation of a hydrophobic environment that was beneficial for the mass-transfer of the hydrophobic nitroarenes. Notably, the catalytic activity of the catalyst was higher than that of palladated perlite and thermos-responsive polymer due to the synergistic effects between the perlite and polymeric moiety. Furthermore, the study of the substrate scope confirmed that a wide range of substrates with different steric and electronic properties could tolerate hydrogenation reaction. Moreover, the catalyst was highly selective toward hydrogenation of the nitro group and could be recycled up to seven runs with insignificant Pd leaching and loss of catalytic activity. The hot filtration test also confirmed the heterogeneous nature of the catalysis. Full article
(This article belongs to the Special Issue Advances in Supported Catalytic Nanomaterials)
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15 pages, 5796 KiB  
Article
Halloysite Nanoclay with High Content of Sulfonic Acid-Based Ionic Liquid: A Novel Catalyst for the Synthesis of Tetrahydrobenzo[b]pyrans
by Samahe Sadjadi, Fatemeh Koohestani, Neda Abedian-Dehaghani and Majid M. Heravi
Catalysts 2021, 11(10), 1172; https://doi.org/10.3390/catal11101172 - 28 Sep 2021
Cited by 9 | Viewed by 2274
Abstract
One of the main drawbacks of supported ionic liquids is their low loading and consequently, low activity of the resultant catalysts. To furnish a solution to this issue, a novel heterocyclic ligand with multi imine sites was introduced on the surface of amino-functionalized [...] Read more.
One of the main drawbacks of supported ionic liquids is their low loading and consequently, low activity of the resultant catalysts. To furnish a solution to this issue, a novel heterocyclic ligand with multi imine sites was introduced on the surface of amino-functionalized halloysite support via successive reactions with 2,4,6-trichloro-1,3,5-triazine and 2-aminopyrimidine. Subsequently, the imine sites were transformed to sulfonic acid-based ionic liquids via reaction with 1,4-butanesultone. Using this strategy, high loading of ionic liquid was loaded on halloysite nanoclay. The supported ionic liquid was then characterized with XRD, SEM, TEM, EDS, FTIR, BET, TGA and elemental mapping analysis and utilized as a metal-free Brønsted acid catalyst for promoting one-pot reaction of aldehydes, dimedone and malononitrile to furnish tetrahydrobenzo[b]pyrans. The catalytic tests confirmed high performance of the catalyst. Moreover, the catalyst was stable upon recycling. Full article
(This article belongs to the Special Issue Advances in Supported Catalytic Nanomaterials)
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