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Nanomaterials
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Nanotechnology in Electrooxidation
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Nanotechnology in Electrooxidation

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (30 December 2022) | Viewed by 2947

Special Issue Editors

Prof. Dr. Hongying Zhao

E-Mail Website
Guest Editor
School of Chemical Science and Engineering, and Shanghai Key lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
Interests: nanomaterials; nanotechnologies; electrocatalysis; photocatalysis, single atom catalysis; water purification; advanced oxidation technologies; oxygen reduction reaction; electron transfer pathway; carbon electrodes; environmental chemistry; physical chemistry
Prof. Dr. Jie Sun

E-Mail Website
Guest Editor
Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission and Ministry of Education, Hubei Province, College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China
Interests: nanomaterials; electrocatalysis; water purification; advanced oxidation technologies; oxygen reduction reaction; carbon electrodes; biochar; soil remediation; environmental engineering

Special Issue Information

Dear Colleagues,

Electrooxidation-mediated techniques have been successfully used to oxidize many kinds of reactants in various aspects of different areas. The main species involved in electrooxidation treatment are electrons and oxidant agents produced in situ, resulting in direct and indirect electrochemical oxidation via a process that has the advantages of involving simple equipment, easy operation and versatile automation. Successful utilization of such techniques, however, still needs to be approached through fundamental and practical innovations that will allow exacting performance targets to be met. The recent and rapid developments in nanotechnology are not only providing new treatment capabilities that could allow more efficient and economic utilization but also offering new opportunities to enhance the next generation of electrooxidation-enabled technologies.

This Special Issue will present comprehensive research on the developing of nanotechnology-related strategies to improve the performance of current electrooxidation processes. This may include the fabrication of nanostructured electrodes and/or the construction of novel devices to enhance the affordability of nanotechnology. We invite authors to contribute original research articles and review articles covering the current progress in nanotechnology in electrooxidation. Potential topics include but are not limited to chemical production, energy conversion, biomedical treatment and environmental remediation.

We look forward to receiving your contributions.

Prof. Dr. Hongying Zhao
Prof. Dr. Jie Sun
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. 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

  • nanomaterials
  • nanotechnologies
  • nanomedicine
  • electrooxidation
  • energy conversion
  • environmental remediation

Published Papers (2 papers)

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Research

18 pages, 5192 KiB  
Article
Heteroatom-Doped Hierarchically Porous Biochar for Supercapacitor Application and Phenol Pollutant Remediation
by Diyong Tang, Li Lu, Zhipeng Luo, Baokun Yang, Jun Ke, Weidong Lei, Hongran Zhen, Yuan Zhuang, Jie Sun, Ke Chen and Jie Sun
Nanomaterials 2022, 12(15), 2586; https://doi.org/10.3390/nano12152586 - 28 Jul 2022
Cited by 8 | Viewed by 1715
Abstract
Biochars are considered as promising materials in energy storage and environmental remediation because of their unique physicochemical properties and low cost. However, the fabrication of multifunctional biochar materials with a well-developed hierarchical porous structure as well as self-doped functionalities via a facile strategy [...] Read more.
Biochars are considered as promising materials in energy storage and environmental remediation because of their unique physicochemical properties and low cost. However, the fabrication of multifunctional biochar materials with a well-developed hierarchical porous structure as well as self-doped functionalities via a facile strategy remains a challenge. Herein, we demonstrate a heteroatom-doped porous biochar, prepared by a hydrothermal pretreatment followed by a molten salt activation route. With the creation of a high specific surface area (1501.9 m2/g), a hierarchical porous structure, and the incorporation of oxygen-/nitrogen-functional groups, the as-prepared biochar (BC-24) exhibits great potential for supercapacitor application and organic pollutant elimination. The assembled biochar electrode delivers a specific capacitance of 378 F/g at 0.2 A/g with a good rate capability of 198 F/g at 10 A/g, and excellent cycling stability with 94.5% capacitance retention after 10,000 recycles. Moreover, BC-24 also exhibits superior catalytic activity for phenol degradation through peroxydisulfate (PDS) activation. The phenol (0.2 mM) can be effectively absorbed and then completely degraded within only 25 min over a wide pH range with low catalyst and PDS dosages. More importantly, TOC analysis indicates 81.7% of the phenol is mineralized within 60 min, confirming the effectiveness of the BC-24/PDS system. Quenching experiments and EPR measurements reveal that SO4·− and ·OH as well as 1O2 are involved in the phenol degradation, while the non-radical pathway plays the dominant role. This study provides valuable insights into the preparation of cost-effective carbon materials for supercapacitor application and organic contaminant remediation. Full article
(This article belongs to the Special Issue Nanotechnology in Electrooxidation)
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16 pages, 29237 KiB  
Article
Highly Dispersion Cu2O QDs Decorated Bi2WO6 S-Scheme Heterojunction for Enhanced Photocatalytic Water Oxidation
by Diyong Tang, Desheng Xu, Zhipeng Luo, Jun Ke, Yuan Zhou, Lizhong Li and Jie Sun
Nanomaterials 2022, 12(14), 2455; https://doi.org/10.3390/nano12142455 - 18 Jul 2022
Cited by 6 | Viewed by 1993
Abstract
Developing suitable photocatalysts for the oxygen evolution reaction (OER) is still a challenging issue for efficient water splitting due to the high requirements to create a significant impact on water splitting reaction kinetics. Herein, n-type Bi2WO6 with flower-like hierarchical [...] Read more.
Developing suitable photocatalysts for the oxygen evolution reaction (OER) is still a challenging issue for efficient water splitting due to the high requirements to create a significant impact on water splitting reaction kinetics. Herein, n-type Bi2WO6 with flower-like hierarchical structure and p-type Cu2O quantum dots (QDs) are coupled together to construct an efficient S-scheme heterojunction, which could enhance the migration efficiency of photogenerated charge carriers. The electrochemical properties are investigated to explore the transportation features and donor density of charge carriers in the S-scheme heterojunction system. Meanwhile, the as-prepared S-scheme heterojunction presents improved photocatalytic activity towards water oxidation in comparison with the sole Bi2WO6 and Cu2O QDs systems under simulated solar light irradiation. Moreover, the initial O2 evolution rate of the Cu2O QDs/Bi2WO6 heterojunction system is 2.3 and 9.7 fold that of sole Bi2WO6 and Cu2O QDs systems, respectively. Full article
(This article belongs to the Special Issue Nanotechnology in Electrooxidation)
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