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Catalysts
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Application of Nanosystems in Catalysis
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Application of Nanosystems in Catalysis

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

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 6673

Special Issue Editors

Dr. Suresh Sagadevan

E-Mail Website
Guest Editor
Nanotechnology and Catalysis Research Centre, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
Interests: nanomaterials; photocatalysts; wastewater treatment; water splitting; CO2 reduction and environmental remediation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Volker Hessel

E-Mail Website
Guest Editor
Faculty of Engineering, Computer and Mathematical Sciences, School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005, Australia
Interests: micro process technology; flow chemistry; process intensification; green processing; sustainability (life cycle assessment, cost analysis)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the period of nanoscience, all devices and technologies are becoming smaller in size while their properties are improving , and new applications are emerging, such as in the biomedical, environmental, and industrial fields. Among those, catalysis is an important field of application in the era of nanoscience. Catalysis was and is a forerunner in the application of nanosciences and nanomaterials, with major applications in chemistry and energy conversion. Catalysis has used nanostructures since its emergence, and numerous innovations and breakthroughs are still being today developed.

This Special Issue aims to collect cutting-edge contributions for the use of nanostructures. This compilation is expected to collect a significant palette of novelty that will keep the scientific community inspired and up to date on the most recent advances in nanomaterials. Contributions to main catalytic approaches such as nanocatalysis (nanoclusters), single-site catalysis, photocatalysis, and electrocatalysis are welcome. Similarly, main applications of nanocatalysts will be covered, including water purification, fuel cells, energy storage, composite solid rocket propellants, bio-diesel production, medicine, dye, and carbon nanotube applications, among others.

Dr. Suresh Sagadevan
Prof. Dr. Volker Hessel
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

  • nanoscience
  • nanomaterials
  • nanocatalyst
  • carbon nanotube
  • nanosystems for energy applications
  • nanosystems for environmental applications

Published Papers (4 papers)

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Research

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15 pages, 6136 KiB  
Article
Synthesis of CaCO3/Cu2O/GO Nanocomposite Catalysts for Hydrogen Production from NaBH4 Methanolysis
by Majed Alshammari, Sultan Alhassan, Khulaif Alshammari, Turki Alotaibi, Taha Abdel Mohaymen Taha, Alhulw H. Alshammari and Ali Ismael
Catalysts 2023, 13(6), 1010; https://doi.org/10.3390/catal13061010 - 16 Jun 2023
Cited by 4 | Viewed by 1595
Abstract
The synthesis of CaCO3/Cu2O/GO nanocomposites was developed by sol-gel auto-combustion method. The analysis of structure was completed on X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and environmental scanning electron microscopy (ESEM). The XRD spectra of the [...] Read more.
The synthesis of CaCO3/Cu2O/GO nanocomposites was developed by sol-gel auto-combustion method. The analysis of structure was completed on X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and environmental scanning electron microscopy (ESEM). The XRD spectra of the nanocomposites matched the crystal structure of CaCO3/Cu2O. The average crystal size was 20 nm for Cu2O and 25 nm for CaCO3 nanoparticles. FTIR data showed the absorption bands of Cu2O and GO. Raman spectroscopy data confirmed the formation of GO sheets. ESEM micrographs displayed spherical nanoparticles dispersed in GO sheets. X-ray photoelectron spectroscopy showed the peaks of Cu 2p, O 1s, C 1s, Cu 3s, and Ca 2p. The spectra of optical absorption revealed an absorption band of around 450 nm. The calcium content increase led to a decrease in the optical energy gap from 2.14 to 1.5 eV. The production of hydrogen from NaBH4 across the methanolysis reaction was accelerated by the CaCO3/Cu2O/GO nanocomposites. Therefore, these nanocomposites are superior in catalytic hydrogen production systems. Full article
(This article belongs to the Special Issue Application of Nanosystems in Catalysis)
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9 pages, 2495 KiB  
Communication
The Semi-Closed Molten Salt-Assisted One-Step Synthesis of N-P-Fe Tridoped Porous Carbon Nanotubes for an Efficient Oxygen Reduction Reaction
by Jianghai Deng and Qiuyun Zhou
Catalysts 2023, 13(5), 824; https://doi.org/10.3390/catal13050824 - 29 Apr 2023
Cited by 1 | Viewed by 1214
Abstract
Transition metal and heteroatom co-doped carbon nanomaterials (TM-H-C) are considered to be the most promising candidates to replace the expensive platinum-based catalysts for oxygen reduction reactions (ORR). Herein, we report a semi-closed molten salt-assisted one-step strategy for fabricating N-P-Fe-tridoped porous carbon nanotube (CNT) [...] Read more.
Transition metal and heteroatom co-doped carbon nanomaterials (TM-H-C) are considered to be the most promising candidates to replace the expensive platinum-based catalysts for oxygen reduction reactions (ORR). Herein, we report a semi-closed molten salt-assisted one-step strategy for fabricating N-P-Fe-tridoped porous carbon nanotube (CNT) catalysts by using the evaporation of ZnCl2 and the catalysis of iron ions to control the heteroatoms doping process and CNT formation. The resultant densely packed porous CNT structure imparts final catalysts with an enhanced mass transfer ability for electron and ORR-involved species, ensuring a high performance in catalyzing the ORR. Significantly, the optimal catalysts show a half-wave potential of 0.89 V (vs. RHE), which is better than commercial platinum-based catalysts and most reported TM-H-C ORR catalysts. Impressively, when applied to a primary inc-oxygen (Zn–O2) battery, the synthesized catalyst comprehensively outperforms the state-of-the-art platinum-based catalyst in both its maximum power density and specific capacity. Full article
(This article belongs to the Special Issue Application of Nanosystems in Catalysis)
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17 pages, 3953 KiB  
Article
Ni, Co and Ni-Co-Modified Tungsten Carbides Obtained by an Electric Arc Method as Dry Reforming Catalysts
by Zhanar Bolatova, Dmitrii German, Ekaterina Pakrieva, Alexander Pak, Kirill Larionov, Sónia A. C. Carabineiro, Nina Bogdanchikova, Ekaterina Kolobova and Alexey Pestryakov
Catalysts 2022, 12(12), 1631; https://doi.org/10.3390/catal12121631 - 13 Dec 2022
Cited by 3 | Viewed by 1707
Abstract
Dry reforming of methane (DRM), to produce synthesis gas, is one of the most important chemical reactions used for the industrial production of hydrogen and leads to the synthesis of hydrocarbons (liquid fuels) and other valuable products. A cost-effective alternative to active and [...] Read more.
Dry reforming of methane (DRM), to produce synthesis gas, is one of the most important chemical reactions used for the industrial production of hydrogen and leads to the synthesis of hydrocarbons (liquid fuels) and other valuable products. A cost-effective alternative to active and stable noble metal DRM catalysts, with comparable catalytic performance, can be composite materials based on nickel, cobalt and transition metal carbides. In this line, the present work proposes a non-standard way to obtain dry reforming catalysts of Ni, Co and Ni-Co-modified tungsten carbide (WC) produced by an electric arc method. Different amounts of nickel, cobalt and their mixtures were deposited on tungsten carbide by deposition-precipitation with NaOH (DP) and incipient wetness impregnation (IWI) methods. The resulting materials were characterized by N2 adsorption-desorption, transmission electron microscopy, energy dispersive spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy, and their performance was evaluated in DRM. The composition and preparation method of catalysts predetermined their structural, textural and electronic properties, playing a decisive role in their activity for DRM. DP-prepared 20%Ni/WC material remained resistant to oxidation, both that of the active metal (nickel) and of the tungsten carbide, as well as to coking during DRM. This sample proved to be the most active and stable among all studied materials. Possibly, the resistance to oxidation and coking was due to a more efficient implementation of the oxidation/(re)carbonization cycle on the surface of this catalyst. Full article
(This article belongs to the Special Issue Application of Nanosystems in Catalysis)
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Review

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28 pages, 4168 KiB  
Review
Nanomaterials Aspects for Photocatalysis as Potential for the Inactivation of COVID-19 Virus
by Samira Bagheri, Nurhidayatullaili Muhd Julkapli, Mohd Rashid Yusof Hamid, Rojin Ziaei and Suresh Sagadevan
Catalysts 2023, 13(3), 620; https://doi.org/10.3390/catal13030620 - 20 Mar 2023
Cited by 1 | Viewed by 1640
Abstract
Coronavirus disease-2019 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and is the most difficult recent global outbreak. Semiconducting materials can be used as effective photocatalysts in photoactive technology by generating various reactive oxidative species (ROS), including superoxide (•O2− [...] Read more.
Coronavirus disease-2019 is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and is the most difficult recent global outbreak. Semiconducting materials can be used as effective photocatalysts in photoactive technology by generating various reactive oxidative species (ROS), including superoxide (•O2−) and hydroxyl (•OH) radicals, either by degradation of proteins, DNA, and RNA or by inhibition of cell development through terminating the cellular membrane. This review emphasizes the capability of photocatalysis as a reliable, economical, and fast-preferred method with high chemical and thermal stability for the deactivation and degradation of SARS-CoV-2. The light-generated holes present in the valence band (VB) have strong oxidizing properties, which result in the oxidation of surface proteins and their inactivation under light illumination. In addition, this review discusses the most recent photocatalytic systems, including metals, metal oxides, carbonaceous nanomaterials, and 2-dimensional advanced structures, for efficient SARS-CoV-2 inactivation using different photocatalytic experimental parameters. Finally, this review article summarizes the limitations of these photocatalytic approaches and provides recommendations for preserving the antiviral properties of photocatalysts, large-scale treatment, green sustainable treatment, and reducing the overall expenditure for applications. Full article
(This article belongs to the Special Issue Application of Nanosystems in Catalysis)
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