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Catalysts
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Catalysts for Advanced Synthesis
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Catalysts for Advanced Synthesis

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

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 15788

Special Issue Editors

Prof. Dr. Katabathini Narasimharao

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Guest Editor
Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
Interests: metal oxides; zeolites; oxidation catalysis; liquid phase catalysis; photocatalysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Mohamed Mokhtar M. Mostafa

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Guest Editor
Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O.Box 80203, 21589 Jeddah, Saudi Arabia
Interests: clay science; zeolites; nanocomposites; liquid phase catalysis; green chemistry; environmental catalysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Shaeel Ahmad Al-Thabaiti

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Guest Editor
Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O.Box 80203, 21589 Jeddah, Saudi Arabia
Interests: physical chemistry; electrochemistry; nanomaterials; adsorption; heterogeneous catalysis
Prof. Dr. Nezar Hassan Khdary

E-Mail Website
Guest Editor
Institute of Materials Science, National Center for Chemical Catalysts, King Abdulaziz City for Science and Technology (KACST), P.O.Box 84909, Riyadh 11681, Saudi Arabia
Interests: nanomaterials; nanocatalysts; dual functions catalysts; photocatalysts; green synthesis

Special Issue Information

ADear Colleagues,

Catalysis plays an important role in chemical industry, creating new pathways in the development of industrial processes. Moreover, catalysis has become crucial to the solution of environmental pollution problems and therefore a positive impact on quality of life. Global concerns for conservation of the resources and environment have encouraged the development of green and sustainable chemical processes, in which the catalysts play a significant role on technologies by achieving a better use of resources.

Introduction of heterogeneous catalysts greatly influenced the development of new synthetic protocols and the minimization of side-products by enhancing the yields of desired products. In spite of all the advancement in this research area, catalysts are not always green and sustainable. Some of the catalysts are in fact not truly heterogeneous, not robust, not stable under different reaction conditions, and difficult to separate to recycle, which compromises its utilization in the chemical processes.

At this time, one of major challenges in the chemical industry is the design and development of heterogeneous catalysts for different chemical processes to nurture sustainable green chemical synthesis.

This Special Issue, “Catalysts for Advanced Synthesis,” covers the design, preparation, characterization, and catalytic performances of heterogeneous nanostructured catalysts for sustainable green chemical processes including C-C coupling, C-H activation and C-C activation. We invite authors to contribute original research articles as well as review articles with special emphasis on sustainable green chemistry involving the use of different types of catalysts ranging from biocatalysts, metal catalysts, metal oxide catalysts, and the use of organic-inorganic hybrid catalysis, among others.

Prof. Dr. Katabathini Narasimharao
Prof. Dr. Mohamed Mokhtar M. Mostafa
Prof. Dr. Shaeel Ahmad Al-Thabaiti
Prof. Dr. Nezar Hassan Khdary
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

  • Heterogeneous Catalysts
  • Homogeneous Catalysts
  • Nanomaterials
  • Sustainable Chemistry
  • Green Chemistry
  • C-C coupling
  • C-H activation
  • C-C activation

Published Papers (3 papers)

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Research

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24 pages, 8063 KiB  
Article
Characterization and Structure Elucidation of Binary Zr:Ti MEL Structure; Simultaneous Photodegradation/Removal of Organic–Inorganic Pollutants
by Samia A. Kosa, Islam H. Abd El Maksod, Eman Z. Hegazy and Naha M. Al-sebaii
Catalysts 2021, 11(5), 633; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11050633 - 14 May 2021
Viewed by 1819
Abstract
The preparation of a series of different Ti/Zr MEL structure was performed successfully. Full characterization of the prepared materials was done using XRD, IR, DR, and SEM. The results show that the prepared materials contain only one crystalline phase (ZSM-11). The affinity of [...] Read more.
The preparation of a series of different Ti/Zr MEL structure was performed successfully. Full characterization of the prepared materials was done using XRD, IR, DR, and SEM. The results show that the prepared materials contain only one crystalline phase (ZSM-11). The affinity of Zr to form the crystalline phase alone in a binary Zr/Ti synthesizing mixture was approved by SEM and elemental analysis results. The percentage of each active site was calculated. DR spectra were deconvoluted, and three active sites were supposed and quantified (tetragonal, octahedral, and crystalline). The mutual effect of ions (lead, copper, cobalt, and nickel) and methylene blue dye on the removal efficiency with and without ultraviolet irradiation was examined and fully characterized. The ions largely influence the photodegradation process, and a mechanism was formulated. Meanwhile, the presence of dye showed a negligible effect on the removal of ions. Full article
(This article belongs to the Special Issue Catalysts for Advanced Synthesis)
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17 pages, 3468 KiB  
Article
In Situ IR Studies on the Mechanism of Dimethyl Carbonate Synthesis from Methanol and Carbon Dioxide
by Khalid A. Almusaiteer, Sulaiman I. Al-Mayman, Aghaddin Mamedov and Yousef S. Al-Zeghayer
Catalysts 2021, 11(4), 517; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11040517 - 20 Apr 2021
Cited by 5 | Viewed by 2451
Abstract
The synthesis of dimethyl carbonate (DMC) from methanol and Carbon dioxide (CO2) has been investigated over 5% Rh/Al2O3 catalyst. Diffuse Reflectance Infrared Fourier Transfer Spectroscopy (DRIFTS) was used to probe the reaction adsorbates which showed that activation of [...] Read more.
The synthesis of dimethyl carbonate (DMC) from methanol and Carbon dioxide (CO2) has been investigated over 5% Rh/Al2O3 catalyst. Diffuse Reflectance Infrared Fourier Transfer Spectroscopy (DRIFTS) was used to probe the reaction adsorbates which showed that activation of methanol and CO2 involves generation of intermediate methoxy species and formate ingredients, participating in elementary steps of DMC formation. Formation of DMC involves parallel routes comprising interaction of the OH group of Al2O3 through an acid/base mechanism and formate pathway with participation of metal sites. DMC in acid/base pathway is formed via methoxy species to form methoxy carbonate (CH3O)CO2 (active adsorbate), which then reacts with the methyl species to form DMC. The pathway involving metal Rh sites generates an additional elementary step for the involvement of CO2 in the reaction through active formate species. The synergy of parallel pathways determines the performance of the 5% Rh/Al2O3 catalyst. Further improvement of catalyst performance should be based on such a feature of the reaction mechanism. Full article
(This article belongs to the Special Issue Catalysts for Advanced Synthesis)
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Review

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21 pages, 3236 KiB  
Review
Metal Oxides as Catalyst/Supporter for CO2 Capture and Conversion, Review
by Nezar H. Khdary, Alhanouf S. Alayyar, Latifah M. Alsarhan, Saeed Alshihri and Mohamed Mokhtar
Catalysts 2022, 12(3), 300; https://0-doi-org.brum.beds.ac.uk/10.3390/catal12030300 - 07 Mar 2022
Cited by 39 | Viewed by 10194
Abstract
Various carbon dioxide (CO2) capture materials and processes have been developed in recent years. The absorption-based capturing process is the most significant among other processes, which is widely recognized because of its effectiveness. CO2 can be used as a feedstock [...] Read more.
Various carbon dioxide (CO2) capture materials and processes have been developed in recent years. The absorption-based capturing process is the most significant among other processes, which is widely recognized because of its effectiveness. CO2 can be used as a feedstock for the production of valuable chemicals, which will assist in alleviating the issues caused by excessive CO2 levels in the atmosphere. However, the interaction of carbon dioxide with other substances is laborious because carbon dioxide is dynamically relatively stable. Therefore, there is a need to develop types of catalysts that can break the bond in CO2 and thus be used as feedstock to produce materials of economic value. Metal oxide-based processes that convert carbon dioxide into other compounds have recently attracted attention. Metal oxides play a pivotal role in CO2 hydrogenation, as they provide additional advantages, such as selectivity and energy efficiency. This review provides an overview of the types of metal oxides and their use for carbon dioxide adsorption and conversion applications, allowing researchers to take advantage of this information in order to develop new catalysts or methods for preparing catalysts to obtain materials of economic value. Full article
(This article belongs to the Special Issue Catalysts for Advanced Synthesis)
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