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2D Nanomaterials and Composites for Energy and Environmental Sustainability—2nd Edition

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

Deadline for manuscript submissions: 30 September 2024 | Viewed by 1587

Special Issue Editors


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Guest Editor
1. Centro de Excelencia en Nuevos Materiales (CENM), Universidad del Valle, A.A, Cali 25360, Colombia
2. Grupo de Transiciones de Fase y Materiales Funcionales, Departamento de Física, Universidad del Valle, A.A, Cali 25360, Colombia
Interests: micro and nanomagnetic materials; micromagnetic simulations; thin films and nanomaterials; hrtem and electron holography; material characterization
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
1. Centro de Excelencia en Nuevos Materiales (CENM), Universidad del Valle, A.A, Cali 25360, Colombia
2. Grupo de Transiciones de Fase y Materiales Funcionales, Departamento de Física, Universidad del Valle, A.A, Cali 25360, Colombia
Interests: nanomaterials and processes; carbonaceous materials; energy conversion and storage; environmental remediation; materials characterization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue focuses on theoretical and experimental studies conducted on 2D nanomaterials and composites specially designed for energy and environmental sustainability applications. A large specific surface area with a submicrometer and nanometer thicknesses (2D nanomaterials), and the possibility to combine more than two materials via multilayer architecture or a heterogeneous mixture of particles with micro- and nanometer grain sizes allow these systems to exhibit extraordinary properties, improving those of their constituent materials or inducing multifunctional behavior. With the advantage of relevant properties such as the quantum-size effect, electron confinement, electrical/thermal conductivity and optical transparency, 2D nanomaterials are essential for energy and environmental applications that include H2 production, CO2 reduction, supercapacitors, electro- and photo-catalytic devices, solar cells, batteries, membrane separation, advanced oxidation process and water remediation. In the case of composites, their multifunctional character offers the ability to improve specific properties for targeted implementation. Like 2D nanomaterials, composite materials have contributed to improving energy production and storage processes, and they are responsible for the logical circular economy model.

Dr. Luis Alfredo Rodríguez
Dr. Edgar Mosquera-Vargas
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. 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

  • film processes
  • flexible substrates
  • carbon capture and conversion
  • nano-electronics and devices
  • ink-jet printing
  • nanostructured permanent magnets
  • carbon-based nanomaterials
  • membrane separation
  • solar cells
  • photonic materials
  • OLED
  • polymer-based nanocomposites
  • gas capture
  • H2 storage and conversion

Related Special Issue

Published Papers (3 papers)

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Research

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10 pages, 2201 KiB  
Article
Evidence of a Proximity Effect in a (AgI)x − C(1−x) Mixture Using a Simulation Model Based on Random Variable Theory
by Hernando Correa, Diego Peña Lara and Edgar Mosquera-Vargas
Molecules 2024, 29(11), 2491; https://doi.org/10.3390/molecules29112491 - 24 May 2024
Viewed by 296
Abstract
Silver iodide is a prototype compound of superionic conductors that allows ions to flow through its structure. It exhibits a first-order phase transition at 420 K, characterized by an abrupt change in its ionic conductivity behavior, and above this temperature, its ionic conductivity [...] Read more.
Silver iodide is a prototype compound of superionic conductors that allows ions to flow through its structure. It exhibits a first-order phase transition at 420 K, characterized by an abrupt change in its ionic conductivity behavior, and above this temperature, its ionic conductivity increases by more than three orders of magnitude. Introducing small concentrations of carbon into the silver iodide structure produces a new material with a mixed conductivity (ionic and electronic) that increases with increasing temperature. In this work, we report the experimental results of the ionic conductivity as a function of the reciprocal temperature for the (AgI)x − C(1−x) mixture at low carbon concentrations (x = 0.99, 0.98, and 0.97). The ionic conductivity behavior as a function of reciprocal temperature was well fitted using a phenomenological model based on a random variable theory with a probability distribution function for the carriers. The experimental data show a proximity effect between the C and AgI phases. As a consequence of this proximity behavior, carbon concentration or temperature can control the conductivity of the (AgI)x − C(1−x) mixture. Full article
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14 pages, 3659 KiB  
Article
Covalent Organic Framework Enhanced Solid Polymer Electrolyte for Lithium Metal Batteries
by Bingyi Ma, Lei Zhong, Sheng Huang, Min Xiao, Shuanjin Wang, Dongmei Han and Yuezhong Meng
Molecules 2024, 29(8), 1759; https://doi.org/10.3390/molecules29081759 - 12 Apr 2024
Cited by 1 | Viewed by 707
Abstract
High ionic conductivity, outstanding mechanical stability, and a wide electrochemical window are the keys to the application of solid-state lithium metal batteries (LMBs). Due to their regular channels for ion transport and tailored functional groups, covalent organic frameworks (COFs) have been applied to [...] Read more.
High ionic conductivity, outstanding mechanical stability, and a wide electrochemical window are the keys to the application of solid-state lithium metal batteries (LMBs). Due to their regular channels for ion transport and tailored functional groups, covalent organic frameworks (COFs) have been applied to solid electrolytes to improve their performance. Herein, we report a flexible polyethylene oxide-COF-LZU1 (abbreviated as PEO-COF) electrolyte membrane with a high lithium ion transference number and satisfactory mechanical strength, allowing for dendrite-free and long-time cycling for LMBs. Benefiting from the interaction between bis(triflfluoromethanesulonyl)imide anions (TFSI) and aldehyde groups in COF-LZU1, the Li+ transference number of the PEO-5% COF-LZU1 electrolyte reached up to 0.43, much higher than that of neat PEO electrolyte (0.18). Orderly channels are conducive to the homogenous Li-+ deposition, thereby inhibiting the lithium dendrites. The assembled LiFePO4|PEO-5% COF-LZU1/Li cells delivered a discharge specific capacity of 146 mAh g−1 and displayed a capacity retention of 80% after 200 cycles at 0.1 C (60 °C). The Li/Li symmetrical cells of the PEO-5% COF-LZU1 electrolyte presented a longer working stability at different current densities compared to that of the PEO electrolyte. Therefore, the enhanced comprehensive performance of the solid electrolyte shows potential application prospects for use in LMBs. Full article
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Review

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20 pages, 1722 KiB  
Review
Exploring the Potential of Endophytic Microorganisms and Nanoparticles for Enhanced Water Remediation
by Madira Coutlyne Manganyi, Tshegofatso Bridget Dikobe and Mametsi Rahab Maseme
Molecules 2024, 29(12), 2858; https://doi.org/10.3390/molecules29122858 (registering DOI) - 16 Jun 2024
Viewed by 330
Abstract
Endophytic microorganisms contribute significantly to water bioremediation by enhancing pollutant degradation and supporting aquatic plant health and resilience by releasing bioactive compounds and enzymes. These microorganisms inhabit plant tissues without causing disease or any noticeable symptoms. Endophytes effectively aid in eliminating contaminants from [...] Read more.
Endophytic microorganisms contribute significantly to water bioremediation by enhancing pollutant degradation and supporting aquatic plant health and resilience by releasing bioactive compounds and enzymes. These microorganisms inhabit plant tissues without causing disease or any noticeable symptoms. Endophytes effectively aid in eliminating contaminants from water systems. Nanoparticles serve as potent enhancers in bioremediation processes, augmenting the efficiency of pollutant degradation by increasing surface area and bioavailability, thereby improving the efficacy and rate of remediation. Their controlled nutrient release and ability to stabilize endophytic colonization further contribute to the enhanced and sustainable elimination of contaminated environments. The synergistic effect of endophytes and nanoparticles in water remediation has been widely explored in recent studies, revealing compelling outcomes. Water pollution poses significant threats to human health, ecosystems, and economies; hence, the sixth global goal of the Sustainable Development Agenda 2030 of the United Nations aims to ensure the availability and sustainable management of water resources, recognizing their crucial importance for current and future generations. Conventional methods for addressing water pollution exhibit several limitations, including high costs, energy-intensive processes, the production of hazardous by-products, and insufficient effectiveness in mitigating emerging pollutants such as pharmaceuticals and microplastics. Noticeably, there is an inability to effectively remove various types of pollutants, thus resulting in incomplete purification cycles. Nanoparticle-enhanced water bioremediation offers an innovative, eco-friendly alternative for degrading contaminants. A growing body of research has shown that integrating endophytic microorganisms with nanoparticles for water bioremediation is a potent and viable alternative. This review examines the potential of using endophytic microorganisms and nanoparticles to enhance water remediation, exploring their combined effects and applications in water purification. The paper also provides an overview of synthetic methods for producing endophyte–nanoparticle composites to optimize their remediation capabilities in aqueous environments. The final section of the review highlights the constraints related to integrating endophytes with nanoparticles. Full article
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