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Catalysts
Special Issues
Advanced Nanomaterials for a Green World II
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Advanced Nanomaterials for a Green World II

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

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 6635

Special Issue Editors

Prof. Dr. María Eugenia Rabanal Jiménez

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Guest Editor
Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Madrid, Spain
Interests: improvement of ceramic systems at the nanoscale range with applications in photocatalysis; luminescence; up-conversion process; Li-ion batteries
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Paloma Fernández Sánchez

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Guest Editor
Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain
Interests: semiconductor metal oxides for applications on sensing photocatalysis and optoelectronics
Special Issues, Collections and Topics in MDPI journals
Dr. Ana Urbieta

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Guest Editor
Department of Materials Physics, Faculty of Physics, Complutense University of Madrid, s/n, 28040 Madrid, Spain
Interests: semiconductor metal oxides; nanomaterials; luminescence; doping; defects
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A recent report of the European Union is entitled "Closing the circle". In the focus of this report is the concept of circular economy. One of the EU's priorities is to promote the transition to this circular economy, where the materials and products manufactured with them are kept in the life cycle as long as possible. The change towards a circular economy model is a basic pillar in most research programs, also in the field of research and development of materials. It should be considered a basic pillar as far as it will have to protect the productive system from the shortage of raw materials, with the consequent volatility of market prices, and the damage to the planet and the development of a sustainable technological society, but also an important aspect of this new framework of action is the improvement of the processes of recycling waste from different sectors, to reintroduce them in the technological lifecycle. To accomplish this change of paradigm, new materials and approaches are needed in most of the commodity sectors. Keep a safe environment, providing clean water for all the population, while protecting the wild life, fighting against the global warming requires the development of new and more efficient photocatalytic materials, able to degrade the pollutants from air and water, but also materials with a high capacity for energy storage, or materials able to detect different deleterious substances before the non-return point is reached.

The aim of this issue is to collect a series of relevant papers on these topics to build a panorama of the current research trends in these topics from a cross-cutting perspective.

Prof. Dr. María Eugenia Rabanal Jiménez
Prof. Dr. Paloma Fernández Sánchez
Dr. Ana Urbieta
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

  • sensing 
  • photocatalysis 
  • emergent contaminants and pollutant photo-degradation, CO2 capture 
  • recycling, and environmentally friendly synthesis methods 
  • nanodevices, batteries, and supercapacitors 
  • metal-oxide-based materials and devices 
  • upconverting materials

Published Papers (3 papers)

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24 pages, 18408 KiB  
Article
Application of Bio-Inspired Gold Nanoparticles as Advanced Nanomaterial in Halt Nociceptive Pathway and Hepatotoxicity via Triggering Antioxidation System
by Rehman Ullah, Sakina Bibi, Muhammad Nauman Khan, Amal M. Al Mohaimeed, Qirat Naz and Asif Kamal
Catalysts 2023, 13(4), 786; https://doi.org/10.3390/catal13040786 - 21 Apr 2023
Cited by 6 | Viewed by 1542
Abstract
This study aimed to investigate the pharmacological efficacy of gold nanoparticles (GNs) synthesized using a green route, employing the rhizome extract of Euphorbia wallichii (REEW) as a bioreductant and surface stabilizing agent. The GNs were characterized by a series of complementary analytical techniques [...] Read more.
This study aimed to investigate the pharmacological efficacy of gold nanoparticles (GNs) synthesized using a green route, employing the rhizome extract of Euphorbia wallichii (REEW) as a bioreductant and surface stabilizing agent. The GNs were characterized by a series of complementary analytical techniques including SEM-EDX, XRD, DLS, and IR spectroscopy. The reducing ability of REEW and synthesis of GNs were confirmed using UV–visible absorption spectroscopy, and the presence of spherical GNs with an fcc geometry was further confirmed through SEM and XRD analyses. The role of REEW’s extract as a stabilizing agent towards GNs was verified through FTIR and electronic absorption spectral measurement. The GC-MS analysis showed the presence of 41 different phytochemicals in REEW (chloromethyl 2-chloroundecanoate; cortisone; benzo[h]quinolone; piperidine, 2,4-dimethyl- 3,6,7-trimethoxyphenanthroindolizidine; 4-methyl-; 2-[2-quinolylmethyleneamino]ethanol, etc.), with RT values ranging from 3.10 to 27.22 min. The REEW-functionalized GNs exhibited promising antioxidant efficacy against H2O2 and *OH used as probe molecules. DPPH scavenging test showed significant EC50 values of 19.47 µg/mL, 13.53 µg/mL, and 10.57 µg/mL at 30, 60, and 90 min of incubation, respectively. Thermal nociceptive mice significantly acquired analgesia in a dose-dependent manner. Moreover, pre-treatment with REEW-GNs significantly restored serum ALT, AST, ALT, T.P, and Bilirubin levels in PCM-intoxicated mice. The antidiabetic activity in alloxan-induced diabetic rabbits fell in orders of metformin > GNs 300 mg/kg b.w > GNs 200 mg/kg b.w > GNs 100 mg/kg b.w > saline at 0.1 h of drug administration. To sum up, REEW functionalized GNs have tremendous potential for curing degenerative/metabolic diseases caused as a result of oxidative stresses. Full article
(This article belongs to the Special Issue Advanced Nanomaterials for a Green World II)
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17 pages, 4204 KiB  
Article
Green Synthesis of Zinc Oxide Nanoparticles Using Nostoc sp. and Their Multiple Biomedical Properties
by Lubna Anjum Minhas, Abdul Samad Mumtaz, Muhammad Kaleem, Dunia Al Farraj, Khalid Kamal, Malik Aamer Hassan Minhas, Rooma Waqar and Rania M. Mahmoud
Catalysts 2023, 13(3), 549; https://doi.org/10.3390/catal13030549 - 09 Mar 2023
Cited by 7 | Viewed by 2288
Abstract
Zinc oxide nanoparticles (ZnONPs) are the top candidate in the field of biological applications because of their high surface area and excellent catalytic activities. In the present study, the cyanobacteria-mediated biosynthesis of zinc oxide NPs using Nostoc sp. extract as a stabilizing, chelating, [...] Read more.
Zinc oxide nanoparticles (ZnONPs) are the top candidate in the field of biological applications because of their high surface area and excellent catalytic activities. In the present study, the cyanobacteria-mediated biosynthesis of zinc oxide NPs using Nostoc sp. extract as a stabilizing, chelating, and reducing agent is reported. ZnONPs were biologically synthesized using an eco-friendly and simple technique with a minimal reaction time and calcination temperature. Various methods, including X-ray diffraction (XRD), ultraviolet spectroscopy (UV), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX) were used to characterize the biosynthesized zinc oxide NPs. XRD analysis depicted the crystalline form of zinc oxide NPs, and the Scherrer equation determined a mean crystalline size of ~28.21 nm. The SEM results reveal the spherical shape of the biosynthesized nanoparticles. Various functional groups were involved in the capping and stabilization of the zinc oxide NPs, which were confirmed by FTIR analysis. The zinc oxide NPs showed strong UV-vis absorption at 340 nm. Multiple in vitro biological applications showed significant therapeutic potential for zinc oxide NPs. Potential antimicrobial assays were reported for zinc oxide NPs via the disc-diffusion method and food poisoning method, respectively. All other activities mentioned below are described with the concentration and IC50 values. Biocompatibility with human erythrocytes and macrophages (IC50: 433 µg/mL, IC50 > 323 µg/mL) and cytotoxic properties using brine shrimps (IC50: 11.15 µg/mL) and Leishmania tropics (Amastigotes IC50: 43.14 µg mL−1 and Promastigotes IC50: 14.02 µg mL−1) were determined. Enzyme inhibition assays (protein kinase and alpha amylase) were performed and showed strong potential. Free radical scavenging tests showed strong antioxidant capacities. These results indicate that zinc oxide NPs synthesized by Nostoc sp. have strong biological applications and are promising candidates for clinical development. Full article
(This article belongs to the Special Issue Advanced Nanomaterials for a Green World II)
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13 pages, 3109 KiB  
Article
Bioinspired Green Synthesis of Bimetallic Iron and Zinc Oxide Nanoparticles Using Mushroom Extract and Use against Aspergillus niger; The Most Devastating Fungi of the Green World
by Asif Kamal, Malka Saba, Asif Kamal, Momal Batool, Muhammad Asif, Amal M. Al-Mohaimeed, Dunia A. Al Farraj, Darima Habib and Shabir Ahmad
Catalysts 2023, 13(2), 400; https://doi.org/10.3390/catal13020400 - 13 Feb 2023
Cited by 7 | Viewed by 2430
Abstract
In the current study, a macro fungus was collected and identified by using morphological and molecular tools to study the ITS region, which has been described as a universal barcode marker during molecular investigation for the identification of fungi. Based on morphology and [...] Read more.
In the current study, a macro fungus was collected and identified by using morphological and molecular tools to study the ITS region, which has been described as a universal barcode marker during molecular investigation for the identification of fungi. Based on morphology and molecular evidence, the collected fungus was identified as Daedalea Mushroom. The identified fungus was used for the synthesis of Iron and ZnO nanoparticles as an eco-friendly agent for nanoparticle synthesis. The synthesized nanoparticles were confirmed by, Fourier transfer infrared spectroscopy analysis (FTIR), X-ray diffraction analysis (XRD), energy dispersive X-ray analysis (EDX), and scanning electron microscopy analysis (SEM). All these characterizations revealed the synthesis of Iron and ZnO NPs with an irregular shape and a size of 16.8 nm. The zinc oxide nanoparticles had a size in the range of 18.53 nm. Daedalea Mushroom was used for the first time to synthesize Iron and zinc nanoparticles. The mycosynthesized Iron and ZnO NPs were assessed as control agents at various dosage rates against the pathogenic fungus Aspergillus niger, which was isolated from an apple and identified using its morphology. At higher concentrations (0.75 mg/mL), the iron nanoparticles inhibited fungal growth by 72%, whereas at lower concentrations (0.25 mg/mL), they inhibited fungal growth by 60%. ZnO NPs showed good antifungal activity at different concentrations including growth inhibition at 0.25 mg/mL (88%), 1.0 mg/mL (68%), 0.75 mg/mL (75%), and 0.5 mg/mL (70%) concentrations of ZnO NPs. However, the maximum growth inhibition of ZnO NPs was observed at 0.25 mg/mL (88%) concentration and minimum growth inhibition at 0.1 mg/mL (22%). The current study concludes that Daedalea Mushroom works as a novel and eco-friendly source for the synthesis of Iron and ZnO NPs with prominent antifungal activities that can be further applied in different fields. Full article
(This article belongs to the Special Issue Advanced Nanomaterials for a Green World II)
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