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Catalysts
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Green Chemistry and Catalysis
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Green Chemistry and Catalysis

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: 31 May 2025 | Viewed by 6894

Special Issue Editors

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, Jeddah 21589, Saudi Arabia
Interests: clay science; zeolites; nanocomposites; liquid-phase catalysis; green chemistry; environmental catalysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Tamer S. Saleh

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Guest Editor
Department of Chemistry, College of Science, University of Jeddah, P.O. Box 80329, Jeddah 21589, Saudi Arabia
Interests: green chemistry; sonochemistry; heterogeneous catalysis and homogeneous catalysis; clean organic synthesis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Nesreen S. Ahmed

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Guest Editor
Department of Therapeutic Chemistry, Pharmaceutical and Drug Industries Research Division, National Research Center, El Buhouth Street, Dokki, Cairo 12622, Egypt
Interests: therapeutic chemistry; pharmaceutical and drug industries
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Special Issues dedicated to green chemistry and catalysis would provide an ideal platform on which to present the most recent developments, innovative methodologies, and noteworthy contributions in this field. The publication may include scholarly papers and review articles by prominent scientists and researchers engaged in the respective subject. Below are many prospective subjects that could be addressed in such a Special Issue:

  1. Sustainable organic synthesis approaches focused on innovative strategies utilizing heterogeneous or homogeneous catalysis that reduce waste generation, utilize renewable resources, and apply environmentally friendly solvents.
  2. The focus of this research is on the creation and improvement of green catalysts. This involves investigating the concepts behind their design and developing methods for synthesizing catalysts that are highly efficient, selective, stable, and ecologically friendly.
  3. Exploring the application of photocatalysis and electrocatalysis in chemical reactions, highlighting the utilization of light or energy as the primary driving force. It also examines the potential of these processes for sustainable synthesis.
  4. Green nanotechnology investigates the utilization of nanomaterials and nanocatalysts in green chemical applications, such as pollution remediation and energy conversion.
  5. Progress in catalytic reaction mechanisms: exploring the underlying comprehension of catalytic reactions and mechanisms to facilitate the development of catalysts that are both more effective and discerning. 

Prof. Dr. Mohamed Mokhtar M. Mostafa
Prof. Dr. Tamer S. Saleh
Prof. Dr. Nesreen S. Ahmed
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 2200 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

  • green chemistry
  • homogeneous catalysts
  • heterogeneous catalysis
  • catalyzed organic synthesis

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

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19 pages, 4136 KiB  
Article
Mechanochemically Modified TiO2 Photocatalysts: Combination of Visible-Light Excitability and Antibacterial Effect
by Orsolya Fónagy, Margit Kovács, Erzsébet Szabó-Bárdos, Petra Csicsor-Kulcsár, Lajos Fodor and Ottó Horváth
Catalysts 2025, 15(4), 316; https://doi.org/10.3390/catal15040316 - 26 Mar 2025
Viewed by 257
Abstract
The goal of this work was to prepare modified titanium dioxide catalysts applicable for self-cleaning and disinfecting surfaces, possessing both antibacterial and photocatalytic activity in the visible-light region, via green and affordable synthesis. For this purpose, silverization was chosen due to its antibacterial [...] Read more.
The goal of this work was to prepare modified titanium dioxide catalysts applicable for self-cleaning and disinfecting surfaces, possessing both antibacterial and photocatalytic activity in the visible-light region, via green and affordable synthesis. For this purpose, silverization was chosen due to its antibacterial and electron-capturing effects, and to achieve efficient visible-light excitation, urea was used as a precursor for nitrogen doping. Mechanochemical activation with grinding, as an environmentally friendly process, was applied for the catalyst modification under various conditions, such as the amounts of the modifying substances, the milling time, the ratio of the weights of the material to be ground, and the grinding balls. The photocatalytic activity in the UV and visible range was tested in suspensions with oxalic acid and coumarin as model compounds. The antibacterial effect was measured by the bioluminescence of Vibrio fischeri bacteria. The highest photocatalytic activity in the visible range was observed with the nitrogen-doped titanium dioxide (N-TiO2) prepared with 10% urea. Silveration of N-TiO2 (up to 0.2%) decreased photocatalytic activity while improving the antibacterial efficiency. To maximize both effects, mechanical mixtures of the separately modified catalysts (N-TiO2 and Ag-TiO2) were also examined in different ratios. The 1:1 mixture provided the optimum combination. Full article
(This article belongs to the Special Issue Green Chemistry and Catalysis)
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22 pages, 5132 KiB  
Article
Zn-Layered Double Hydroxide Intercalated with Graphene Oxide for Methylene Blue Photodegradation and Acid Red Adsorption Studies
by Rahmah H. Al-Ammari, Salwa D. Al-Malwi, Mohamed A. Abdel-Fadeel, Salem M. Bawaked and Mohamed Mokhtar M. Mostafa
Catalysts 2024, 14(12), 897; https://doi.org/10.3390/catal14120897 - 6 Dec 2024
Cited by 2 | Viewed by 1302
Abstract
This study focuses on the synthesis of a novel layered double hydroxide and its application in two environmental remediation processes. Graphene oxide, a two-dimensional material, has potential applications in this field. However, its tendency to agglomerate restricts its usability. Our objective was to [...] Read more.
This study focuses on the synthesis of a novel layered double hydroxide and its application in two environmental remediation processes. Graphene oxide, a two-dimensional material, has potential applications in this field. However, its tendency to agglomerate restricts its usability. Our objective was to increase the morphology and performance of layered double hydroxide (LDH) by combining GO with hydrotalcite. The LDH/GO nanohybrids were utilized as photocatalysts for the degradation of methylene blue (MB) dye and were investigated as sorbents for acid red (A.R) dye in water. In order to achieve this objective, ZnAl-NO3 LDH was synthesized using the co-precipitation method, with a Zn:Al ratio of ~3. Subsequently, the LDH was intercalated with varying ratios of as-received graphene oxide. An array of analytical techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) measurements, N2 physisorption, scanning electron microscopy–energy-dispersive X-ray analysis (SEM-EDX), and diffuse reflectance UV–vis spectra (DR UV-vis), were employed to examine the physicochemical properties of the synthesized LDH. These techniques confirmed that the obtained material is zinc-aluminum hydrotalcite intercalated with GO. The addition of graphene oxide (GO) to the layered double hydroxide (LDH) structure improved the performance of the hydrotalcite. As a result, the composite ZnAl-LDH-10 shows significant potential in the field of photocatalytic degradation of MB. Additionally, the incorporation of GO enhanced the absorption of light in the visible region of the spectra, leading to improved elimination of A.R compared to LDH without GO or other ratios of GO. Full article
(This article belongs to the Special Issue Green Chemistry and Catalysis)
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12 pages, 5341 KiB  
Article
Defective TiO2/MIL-88B(Fe) Photocatalyst for Tetracycline Degradation: Characterization and Augmented Photocatalytic Efficiency
by Dongsheng Xiang, Zhihao Wang, Jingwen Xu, Hongdan Shen, Xiaodong Zhang and Ning Liu
Catalysts 2024, 14(8), 528; https://doi.org/10.3390/catal14080528 - 15 Aug 2024
Cited by 1 | Viewed by 1127
Abstract
Photocatalysts, such as TiO2, are widely used in photoreduction. However, drawbacks like their wide band gap and short carrier lifetime lead to lower efficiencies with their use. Introducing defects and forming heterostructures of TiO2 could extend the carrier’s light-harvesting range [...] Read more.
Photocatalysts, such as TiO2, are widely used in photoreduction. However, drawbacks like their wide band gap and short carrier lifetime lead to lower efficiencies with their use. Introducing defects and forming heterostructures of TiO2 could extend the carrier’s light-harvesting range from UV to visible light and enhance its lifetime. Herein, an electron-beam irradiation-defected TiO2 was induced in MIL-88B(Fe). The structure of the material was characterized using XRD, FT-IR, TEM, HRTEM, and XPS techniques. Remarkably, TiO2 under 300 kGy electron-beam irradiation performed the best with a series of 0, 100, 300, and 500 kGy irradiation ratios. PL and UV–vis DRS were utilized to measure the material’s optical properties. The introduction of MIL-88B(Fe) expanded the light response range, reduced the optical band gap, and lengthened the carrier lifetime of the defective TiO2 composite photocatalysts, resulting in superior TC photoreduction capabilities of 88B5%300, which degraded 97% of tetracycline (10 mg/L) in water after 120 min. Full article
(This article belongs to the Special Issue Green Chemistry and Catalysis)
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Review

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22 pages, 6321 KiB  
Review
A Review of Innovative Cucurbituril-Based Photocatalysts for Dye Degradation
by Mosab Kaseem
Catalysts 2024, 14(12), 917; https://doi.org/10.3390/catal14120917 (registering DOI) - 12 Dec 2024
Viewed by 3471
Abstract
This review explores the advancements in photocatalysis facilitated by cucurbiturils (CBs), specifically focusing on CB[5], CB[6], CB[7], and CB[8]. Cucurbiturils have gained prominence due to their exceptional ability to enhance photocatalytic reactions through mechanisms such as improved charge separation, high adsorption capacities, and [...] Read more.
This review explores the advancements in photocatalysis facilitated by cucurbiturils (CBs), specifically focusing on CB[5], CB[6], CB[7], and CB[8]. Cucurbiturils have gained prominence due to their exceptional ability to enhance photocatalytic reactions through mechanisms such as improved charge separation, high adsorption capacities, and the generation of reactive oxygen species. The review summarizes recent research on the use of CBs in various photocatalytic applications, including dye degradation, pollutant removal, and wastewater treatment. Studies highlight CB[5]’s utility in dye removal and the creation of efficient nanocomposites for improved degradation rates. CB[6] is noted for its high adsorption capacities and photocatalytic efficiency in both adsorption and degradation processes. CB[7] shows promise in adsorbing and degrading toxic dyes and enhancing fluorescence in biomedical applications, while CB[8] leads to significant improvements in photocatalytic activity and stability. The review also discusses the synthesis, properties, and functionalization of cucurbiturils to maximize their photocatalytic potential. Future research directions include the optimization of cucurbituril-based composites, the exploration of new application areas, and scaling up their use for practical environmental and industrial applications. This comprehensive review provides insights into the current capabilities of cucurbituril-based photocatalysts and identifies key areas for future development in sustainable photocatalytic technologies. Full article
(This article belongs to the Special Issue Green Chemistry and Catalysis)
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