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Environmental Nanomaterials: Source, Analysis and Application
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Environmental Nanomaterials: Source, Analysis and Application

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: closed (10 May 2022) | Viewed by 4174

Special Issue Editor

Dr. Imad AM Ahmed

E-Mail Website
Guest Editor
Department of Earth Sciences, The University of Oxford, Oxford, UK
Interests: environmental pollution; heavy metals; environmental nanomaterials; water clean-up; redox-active materials; chemical speciation of trace elements; synchrotron radiation for environmental sciences

Special Issue Information

Nanomaterials can be used for water and air purification, wastewater treatment, inactivation of microorganisms, and conversion of fuel energy into electricity. Nanocomposites made of multiple nanomaterials usually have superior performance in pollutant removal. This Special Issue aims at presenting a compilation of papers that demonstrate the continuous research efforts in developing advanced and safe nanomaterial for environmental applications.

Keywords

  • nanostructured materials
  • environmental pollution
  • environmental nanomaterials
  • environmental remediation
  • environmental sciences

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Published Papers (1 paper)

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Research

15 pages, 2877 KiB  
Article
Sargassum Influx on the Mexican Coast: A Source for Synthesizing Silver Nanoparticles with Catalytic and Antibacterial Properties
by Jose Luis López-Miranda, Rodrigo Esparza, Marlen Alexis González-Reyna, Beatriz Liliana España-Sánchez, Angel Ramon Hernandez-Martinez, Rodolfo Silva and Miriam Estévez
Appl. Sci. 2021, 11(10), 4638; https://doi.org/10.3390/app11104638 - 19 May 2021
Cited by 19 | Viewed by 3681
Abstract
This work reports, for the first time, the synthesis of silver nanoparticles using extracts of the species of Sargassum natans and Sargassum fluitans (AgNPs-S). Their antibacterial and catalytic properties are compared with silver nanoparticles obtained by chemical synthesis (AgNPs-C). The characterization of AgNPs-S [...] Read more.
This work reports, for the first time, the synthesis of silver nanoparticles using extracts of the species of Sargassum natans and Sargassum fluitans (AgNPs-S). Their antibacterial and catalytic properties are compared with silver nanoparticles obtained by chemical synthesis (AgNPs-C). The characterization of AgNPs-S and AgNPs-C was carried out using ultraviolet–visible spectroscopy (UV–Vis), dynamic light scattering (DLS), zeta potential, a scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis. The synthesis of silver nanoparticles using Sargassum extract was optimized through varying experimental parameters, such as the type of solvent used to prepare the extract, the volume of the extract, and the pH of the system. The most efficient sample (AgNPs-S) was prepared with a water–ethanol-based extract, using a 3:1 volumetric ratio of extract: a precursor salt with the addition of 1 mL of NaOH pH = 14. The AgNPs-C were spherical in shape, with an average particle size of 11.55 nm, while the AgNPs-S were polyhedral shaped, with an average particle size of 26.39 nm. The synthesized AgNPs-S were found to have significantly higher catalytic activity for the degradation of methylene blue and more effective antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa than AgNPs-C. Full article
(This article belongs to the Special Issue Environmental Nanomaterials: Source, Analysis and Application)
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