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Nanomaterials
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Advances in Green Nanotechnology: From Nanoparticles' Green Synthesis to Their...
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Advances in Green Nanotechnology: From Nanoparticles' Green Synthesis to Their Applications in Engineering

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanofabrication and Nanomanufacturing".

Deadline for manuscript submissions: 25 November 2024 | Viewed by 3258

Special Issue Editors

Dr. Rui A. Lima

E-Mail Website
Guest Editor
Mechanical Engineering Department, Minho University, Campus de Azurém, 4800-058 Guimarães, Portugal
Interests: biomicrofluidics; microcirculation; biofluid mechanics; blood-on-chips; conventional and confocal micro-PIV; nanofluids; energy and environment
Special Issues, Collections and Topics in MDPI journals
Dr. Diana Pinho

E-Mail Website
Guest Editor
1. MicroElectroMechanical Systems Research Unit (CMEMS), University of Minho, 4800-058 Guimarães, Portugal
2. LABBELS–Associate Laboratory, Braga, Portugal
Interests: biomicrofluidics; nanomedicine; microfluidic devices; organ-on-a-chip; biosensors
Special Issues, Collections and Topics in MDPI journals
Dr. Beatriz D. Cardoso

E-Mail Website
Guest Editor Assistant
Mechanical Engineering Department, Minho University, Campus de Azurém, 4800- 058 Guimarães, Portugal
Interests: nanomedicine; drug delivery; nanoparticles synthesis; magnetic nanoparticles
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanotechnology holds unquestionable potential in several industries. The unique physical, chemical, and mechanical properties of nanoparticles allow them to be used in various areas of engineering, offering solutions to create or optimize materials with superior performances. However, the environmental impacts of conventional physical and chemical nanoparticle synthesis methods have driven researchers to develop greener alternatives such as “Green Synthesis.” This approach is based on environmentally friendly methods using bioactive compounds extracted from biological materials for nanoparticle synthesis. The application of green nanomaterials has affirmed their potential in multifarious applications, i.e., cancer therapy, wastewater treatment, agriculture, heat transfer, bioimaging, and sensing.

This Special Issue aims to highlight the latest advances on the subject by covering these areas: (i) the green synthesis of nanoparticles (from plants, micro- and macro-algae, microorganisms, bacteria, biowastes, and biopolymers); (ii) the characterization and fundamental properties of green nanoparticles; (iii) the practical and potential applications of green nanoparticles. Thus, all manuscripts reporting original research, short communications, state-of-the-art reviews, and perspectives on the latest subject developments are welcome. Topics include, but are not limited to, the following:

  • Micro- and nanoparticles;
  • Green- and biosynthesis methods;
  • Green nanoparticles;
  • Green technologies;
  • Green nanoparticle characterization;
  • Applications of green nanoparticles in engineering.

Dr. Rui A. Lima
Dr. Diana Pinho
Guest Editors

Dr. Beatriz D. Cardoso
Guest Editor Assistant

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. Nanomaterials is an international peer-reviewed open access semimonthly 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 2900 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 synthesis
  • biosynthesis
  • biological synthesis
  • sustainable chemistry
  • nanomaterials
  • nanoparticles
  • engineering applications

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

Published Papers (3 papers)

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Research

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19 pages, 5069 KiB  
Article
Sustainable Graphene Production: Flash Joule Heating Utilizing Pencil Graphite Precursors
by Mashhood Zahid and Tomy Abuzairi
Nanomaterials 2024, 14(15), 1289; https://doi.org/10.3390/nano14151289 - 31 Jul 2024
Viewed by 872
Abstract
The production of graphene from cost-effective and readily available sources remains a significant challenge in materials science. This study investigates the potential of common pencil leads as precursors for graphene synthesis using the Flash Joule Heating (FJH) process. We examined 6H, 4B, and [...] Read more.
The production of graphene from cost-effective and readily available sources remains a significant challenge in materials science. This study investigates the potential of common pencil leads as precursors for graphene synthesis using the Flash Joule Heating (FJH) process. We examined 6H, 4B, and 14B pencil grades, representing different graphite-to-clay ratios, under varying voltages (0 V, 200 V, and 400 V) to elucidate the relationships among initial composition, applied voltage, and resulting graphene quality. Samples were characterized using Raman spectroscopy, electrical resistance measurements, and microscopic analysis. The results revealed grade-specific responses to applied voltages, with all samples showing decreased electrical resistance post-FJH treatment. Raman spectroscopy indicated significant structural changes, particularly in ID/IG and I2D/IG ratios, providing insights into defect density and layer stacking. Notably, the 14B pencil lead exhibited unique behavior at 400 V, with a decrease in the ID/IG ratio from 0.135 to 0.031 and an increase in crystallite size from 143 nm to 612 nm, suggesting potential in situ annealing effects. In contrast, harder grades (6H and 4B) showed increased defect density at higher voltages. This research contributes to the development of more efficient and environmentally friendly methods for graphene production, potentially opening new avenues for sustainable and scalable synthesis. Full article
(This article belongs to the Special Issue Advances in Green Nanotechnology: From Nanoparticles' Green Synthesis to Their Applications in Engineering)
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17 pages, 9947 KiB  
Article
Combined Electrochemical Deposition and Photo-Reduction to Fabricate SERS-Active Silver Substrates: Characterization and Application for Malachite Green Detection in Aquaculture Water
by Yu-Xuan Li, Yi-Ting Chen, Cheng-Tse Chang, Chao Yi (Anso) Ting, Yaumalika Arta, Mei-Yao Wu, Tsunghsueh Wu, Yu-Shen Lin and Yang-Wei Lin
Nanomaterials 2024, 14(14), 1226; https://doi.org/10.3390/nano14141226 - 19 Jul 2024
Viewed by 543
Abstract
This research introduces a novel approach using silver (Ag) nanostructures generated through electrochemical deposition and photo-reduction of Ag on fluorine-doped tin oxide glass substrates (denoted as X-Ag-AgyFTO, where ‘X’ and ‘y’ represent the type of light source and number of deposited [...] Read more.
This research introduces a novel approach using silver (Ag) nanostructures generated through electrochemical deposition and photo-reduction of Ag on fluorine-doped tin oxide glass substrates (denoted as X-Ag-AgyFTO, where ‘X’ and ‘y’ represent the type of light source and number of deposited cycles, respectively) for surface-enhanced Raman spectroscopy (SERS). This study used malachite green (MG) as a Raman probe to evaluate the enhancement factors (EFs) in SERS-active substrates under varied fabrication conditions. For the substrates produced via electrochemical deposition, we determined a Raman EF of 6.15 × 104 for the Ag2FTO substrate. In photo-reduction, the impact of reductant concentration, light source, and light exposure duration were examined on X-Ag nanoparticle formation to achieve superior Raman EFs. Under optimal conditions (9.0 mM sodium citrate, 460 nm blue-LED at 10 W for 90 min), the combination of blue-LED-reduced Ag (B-Ag) and an Ag2FTO substrate (denoted as B-Ag-Ag2FTO) exhibited the best Raman EF of 2.79 × 105. This substrate enabled MG detection within a linear range of 0.1 to 1.0 µM (R2 = 0.98) and a detection limit of 0.02 µM. Additionally, the spiked recoveries in aquaculture water samples were between 90.0% and 110.0%, with relative standard deviations between 3.9% and 6.3%, indicating the substrate’s potential for fungicide detection in aquaculture. Full article
(This article belongs to the Special Issue Advances in Green Nanotechnology: From Nanoparticles' Green Synthesis to Their Applications in Engineering)
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Review

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39 pages, 5578 KiB  
Review
A Review of Plant-Mediated ZnO Nanoparticles for Photodegradation and Antibacterial Applications
by Dorcas Mutukwa, Raymond Tichaona Taziwa and Lindiwe Khotseng
Nanomaterials 2024, 14(14), 1182; https://doi.org/10.3390/nano14141182 - 11 Jul 2024
Viewed by 654
Abstract
This review focuses on the synthesis of plant-mediated zinc oxide nanoparticles (ZnO NPs) and their applications for antibacterial and photocatalytic degradation of dyes, thereby addressing the need for sustainable and eco-friendly methods for the preparation of NPs. Driven by the significant rise in [...] Read more.
This review focuses on the synthesis of plant-mediated zinc oxide nanoparticles (ZnO NPs) and their applications for antibacterial and photocatalytic degradation of dyes, thereby addressing the need for sustainable and eco-friendly methods for the preparation of NPs. Driven by the significant rise in antibiotic resistance and environmental pollution from dye pollution, there is a need for more effective antibacterial agents and photocatalysts. Therefore, this review explores the synthesis of plant-mediated ZnO NPs, and the influence of reaction parameters such as pH, annealing temperature, plant extract concentration, etc. Additionally, it also looks at the application of plant-mediated ZnO NPs for antibacterial and photodegradation of dyes, focusing on the influence of the properties of the plant-mediated ZnO NPs such as size, shape, and bandgap on the antibacterial and photocatalytic activity. The findings suggest that properties such as shape and size are influenced by reaction parameters and these properties also influence the antibacterial and photocatalytic activity of plant-mediated ZnO NPs. This review concludes that plant-mediated ZnO NPs have the potential to advance green and sustainable materials in antibacterial and photocatalysis applications. Full article
(This article belongs to the Special Issue Advances in Green Nanotechnology: From Nanoparticles' Green Synthesis to Their Applications in Engineering)
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