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Molecules
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Electroanalytical Chemistry in Composite Materials, Biomaterials and Mineral Materials
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Electroanalytical Chemistry in Composite Materials, Biomaterials and Mineral Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Electrochemistry".

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 2741

Special Issue Editors

Dr. Na Zhang

E-Mail Website
Guest Editor
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: electrochemistry; surface chemistry; flotation; gold leaching; rheology
Dr. Ru-Jia Yu

E-Mail Website
Guest Editor
State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210008, China
Interests: electrochemical properties of biomaterials; confined nanopipette sensing; immunosensing
Dr. Jingxiu Wang

E-Mail Website
Guest Editor Assistant
School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide 5005, Australia
Interests: composite materials; electrode materials

Special Issue Information

Dear Colleagues,

Composite materials, biomaterials and mineral materials are critical in the field of healthcare and industry. Their special usages are attributed to their special properties. To discover the nature of those materials, electroanalytical Chemistry is a powerful tool. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV) etc. are all effective methods can be employed.

This Special Issue aims to collect papers on electroanalytical chemistry in composite materials, biomaterials and mineral materials, which would have the potential to support their upgrade and application.

Topics of interests include, but are not limited to:

  • Electrochemistry
  • Composite materials
  • Biomaterials
  • Mineral materials
  • Electrode materials
  • Ionic liquid

Dr. Na Zhang
Dr. Ru-Jia Yu
Guest Editors

Dr. Jingxiu Wang
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. Molecules 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 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

  • electrochemistry
  • biomaterials
  • composite materials
  • mineral materials
  • surface chemistry

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

Published Papers (2 papers)

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Research

16 pages, 3636 KiB  
Article
The Interaction between Iron Cyanide and Lead Ions in Pyrite Flotation
by Xiaoxia Yang, Yufan Mu and Shiqi Liu
Molecules 2024, 29(11), 2517; https://doi.org/10.3390/molecules29112517 - 27 May 2024
Viewed by 804
Abstract
Despite being a major cyanide species in the process water, it is unclear how iron cyanide influences pyritic gold ore flotation as well as how lead ions influence pyritic gold ore flotation in the presence of iron cyanide. This study aims at revealing [...] Read more.
Despite being a major cyanide species in the process water, it is unclear how iron cyanide influences pyritic gold ore flotation as well as how lead ions influence pyritic gold ore flotation in the presence of iron cyanide. This study aims at revealing the interaction of Fe(CN)63− and lead ions in pyrite flotation to investigate the strong depressing effect of Fe(CN)63− on pyritic gold ore flotation and the significant activating effect of lead ions on pyritic gold ore flotation in the presence of Fe(CN)63− using flotation, zeta potential measurement and surface analysis methods. The flotation results showed that upon 5 × 10−5 mol/L Fe(CN)63− addition, pyrite recovery drastically decreased from about 51.3% to 8.6%, while the subsequent addition of 9.5 × 10−4 mol/L lead ions significantly activated pyrite with the recovery increasing from 8.6% to 91%, which demonstrated that Fe(CN)63− strongly depressed pyrite flotation, while lead ions completely activated pyrite in the presence of Fe(CN)63−. Zeta potential measurement, surface analysis using Cryogenic X-ray photoelectron spectroscopy (Cryo-XPS) and electrochemical impedance spectroscopy (EIS) revealed that Fe(CN)63− depression was attributed to the chemical adsorption of Fe(CN)63− on iron sites of pyrite as Prussian Blue (Fe[Fe(CN)6]); however, this hydrophilic layer could be covered totally by lead ions which adsorbed on as lead hydroxide/oxide through electrostatic interactions, which resulted in the significant activation effect of lead ions. The results from this study will lead to improved flotation of gold associated with pyrite in gold flotation plants. Full article
(This article belongs to the Special Issue Electroanalytical Chemistry in Composite Materials, Biomaterials and Mineral Materials)
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15 pages, 5091 KiB  
Article
Determination of Fluoxetine in Weight Loss Herbal Medicine Using an Electrochemical Sensor Based on rGO-CuNPs
by Aline Giuli Melaré, Francisco Contini Barreto, Martin Kassio Leme Silva, Rafael Plana Simões and Ivana Cesarino
Molecules 2023, 28(17), 6361; https://doi.org/10.3390/molecules28176361 - 30 Aug 2023
Cited by 5 | Viewed by 1362
Abstract
The rising popularity of herbal medicine as a weight loss remedy, fueled by misleading propaganda, raises concerns about the manufacturing processes and potential inclusion of controlled substances such as fluoxetine (FLU). The objective of this work is to develop and evaluate the performance [...] Read more.
The rising popularity of herbal medicine as a weight loss remedy, fueled by misleading propaganda, raises concerns about the manufacturing processes and potential inclusion of controlled substances such as fluoxetine (FLU). The objective of this work is to develop and evaluate the performance of an electrochemical device by modifying a glassy carbon electrode (GC) with a nanocomposite based on reduced graphene oxide (rGO) and copper nanoparticles (CuNPs) for detecting FLU in manipulated herbal medicines. Scanning electron microscopy (FEG-SEM) and cyclic voltammetry (CV) were applied for morphological and electrochemical characterization and analysis of the composite’s electrochemical behavior. Under optimized conditions, the proposed sensor successfully detected FLU within the range of 0.6 to 1.6 µmol L−1, showing a limit of detection (LOD) of 0.14 µmol L−1. To determine the presence of FLU in herbal samples, known amounts of the analytical standard were added to the sample, and the analyses were performed using the standard addition method, yielding recoveries between −2.13 and 2.0%. Full article
(This article belongs to the Special Issue Electroanalytical Chemistry in Composite Materials, Biomaterials and Mineral Materials)
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