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Novel Approaches to Photoelectrochemical and Electrochemical Nanomaterials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 1982

Special Issue Editors


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Guest Editor
School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea
Interests: nanocomposites; photocatalysts; materials science; electrocatalysis; energy conversion

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Guest Editor
Department of Chemical Engineering, Yeungnam University, 214-1, Dae-hakro 280, Gyeongsan, Gyeongbuk 712-749, Republic of Korea
Interests: metal-organic frameworks; photoelectrochemical studies; bio-sensing; dye-sensitized solar cells
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Guest Editor
Department of Chemistry, Koneru Lakshmaiah Education Foundation (KLEF), Vaddeswaram, Guntur-522 502, India
Interests: electrochemical advanced oxidation process; zeolite catalysis; water decontamination; heterogeneous catalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Carbon nanomaterials (carbon nanotubes, graphene oxide, graphene, carbon dots, etc.), transition metal dichalcogenides, MXenes, earth-abundant non-noble-metal nanostructures, metal oxides from metal–organic frameworks (MOFs), and other types of nanostructures are gaining profound attention due to their remarkable activity in various electrochemical processes and reactions. Advancements in the preparation of new nanomaterials and nanotechnology can improve various photoelectrochemical and electrochemical applications such as water splitting, CO2 conversion, water treatment, photovoltaics, electrochemical sensing, optoelectronic devices, metal–air batteries, fuel cells, electrochemical flow batteries, and other critical processes.

Currently, it is widely accepted that the poor energy conversion efficiency of nanomaterials is the predominant constraint of photo-electrochemical catalysts. This Special Issue, entitled "Novel Approaches to Photoelectrochemical and Electrochemical Nanomaterials", aims to provide a comprehensive account of the recent developments in innovative nanomaterials that have a major impact on the photo and/or electrochemical performance of catalysts. Unique nanomaterial designs, innovative material preparation and processing, detailed nanomaterial characterization, and photo- or electrochemical assessment data for photoelectrochemical/electrochemical applications are the major topics of this Special Issue.

Prof. Dr. Surendar Tonda
Dr. Ganesh Koyyada
Dr. Mameda Naresh
Guest Editors

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Keywords

  • novel and advanced nanomaterials/nanostructures
  • photoelectrochemical water splitting (PEC)
  • nanomaterial-based photoelectrodes for solar cells
  • materials for photoelectrochemical CO2 reduction
  • materials for electrochemical sensing
  • materials for energy storage

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Published Papers (1 paper)

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Research

14 pages, 5161 KiB  
Article
Enhanced Photoelectrochemical Water Oxidation Using TiO2-Co3O4 p–n Heterostructures Derived from in Situ-Loaded ZIF-67
by Chau Thi Thanh Thu, Hyo Jeong Jo, Ganesh Koyyada, Dae-Hwan Kim and Jae Hong Kim
Materials 2023, 16(15), 5461; https://doi.org/10.3390/ma16155461 - 4 Aug 2023
Cited by 3 | Viewed by 1610
Abstract
Exposing catalytically active metal sites in metal–organic frameworks (MOFs) while maintaining porosity is beneficial for increasing electron transport to achieve better electrochemical energy conversion performance. Herein, we propose an in situ method for MOF formation and loading onto TiO2 nanorods (NR) using [...] Read more.
Exposing catalytically active metal sites in metal–organic frameworks (MOFs) while maintaining porosity is beneficial for increasing electron transport to achieve better electrochemical energy conversion performance. Herein, we propose an in situ method for MOF formation and loading onto TiO2 nanorods (NR) using a simple solution-processable method followed by annealing to obtain TiO2-Co3O4. The as-prepared TiO2-ZIF-67 based photoanodes were annealed at 350, 450, and 550 °C to study the effect of carbonization on photo-electrochemical water oxidation. The successful loading of ZIF-67 on TiO2 and the formation of TiO2-Co3O4 heterojunction were confirmed by XRD, XPS, FE-SEM, and HRTEM analyses. TiO2-Co3O4-450 (the sample annealed at 450 °C) showed an enhanced photocurrent of 2.4 mA/cm2, which was 2.6 times larger than that of pristine TiO2. The improved photocurrent might be ascribed to the prepared p–n heterostructures (Co3O4 and TiO2), which promote electron–hole separation and charge transfer within the system and improve the photoelectrochemical performance. Moreover, the preparation of Co3O4 from the MOF carbonization process improved the electrical conductivity and significantly increased the number of exposed active sites and enhanced the photoresponse performance. The as-prepared ZIF-67 derived TiO2-Co3O4 based photoanodes demonstrate high PEC water oxidation, and the controlled carbonization method paves the way toward the synthesis of low-cost and efficient electrocatalysts. Full article
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