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Micromachines
Special Issues
Nanomaterials Based Catalysis and Energy Conversion
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Nanomaterials Based Catalysis and Energy Conversion

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D：Materials and Processing".

Deadline for manuscript submissions: closed (10 May 2024) | Viewed by 1768

Special Issue Editor

Dr. Sankar Das

E-Mail Website
Guest Editor
Division of Chemistry and Biological Chemistry, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
Interests: photocatalysis; electrocatalysis; gas adsorption; H2 evolution; energy conversion; nanomaterials; 2D materials; semiconductor materials; heavy metal adsorption; advanced oxidation process for water treatments

Special Issue Information

Dear Colleagues,

Photocatalysis involves using abundantly available photonic energy to catalyze chemical reactions for converting useful chemical energy, while electrocatalysis employs electrical energy for the same purpose. These processes necessitate the development of renewable technology for both energy generation and environmental restoration. In particular, nanoscale materials have become intriguing possibilities for energy and catalysis applications due to their distinct physical, chemical and electrical properties. Massive surface-to-volume ratios, good transport characteristics, intriguing physicochemical features and confinement effects of the nanostructure are all advantages of these materials, which offer tremendous opportunities for enhancing catalytic performance and energy conversion in these fields.

The motivations for improving nanomaterials as photo- or electrocatalysts and energy conversion for those applications are all thoroughly explored in this Special Issue.

We feature a compilation of research articles and reviews that showcase the recent progress in utilizing nanomaterials for photo- and electrocatalysis for energy production and valuable organic chemical transformation, as well as advanced oxidation processes for water treatment and potential applications in energy generation and storage devices. The issue covers various nanomaterials, semiconductors and 2D materials, metal nanoparticles, metal oxides, quantum dots, carbon-based nanomaterials, hybrid nanostructures and related advanced materials.

This Special Issue serves as a comprehensive source of knowledge for researchers, scientists, and engineers working in the field of nanomaterials for catalysis and energy conversion. It aims to advance the understanding and application of nanomaterials in these critical areas, ultimately contributing to the development of sustainable energy and environmental technologies.

Dr. Sankar Das
Guest Editor

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. Micromachines is an international peer-reviewed open access monthly 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 2600 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

  • photocatalysis
  • electrocatalysis
  • nanomaterials
  • nanostructures
  • energy generation and storage
  • advanced oxidation process

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Published Papers (1 paper)

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Research

11 pages, 2238 KiB  
Article
Nanostructured Oxide (SnO2, FTO) Thin Films for Energy Harvesting: A Significant Increase in Thermoelectric Power at Low Temperature
by Karuppiah Deva Arun Kumar, S. Valanarasu, Alex Capelle, Sibel Nar, Wael Karim, Arnaud Stolz, Barthélemy Aspe and Nadjib Semmar
Micromachines 2024, 15(2), 188; https://doi.org/10.3390/mi15020188 - 26 Jan 2024
Cited by 2 | Viewed by 1525
Abstract
Previous studies have shown that undoped and doped SnO2 thin films have better optical and electrical properties. This study aims to investigate the thermoelectric properties of two distinct semiconducting oxide thin films, namely SnO2 and F-doped SnO2 (FTO), by the [...] Read more.
Previous studies have shown that undoped and doped SnO2 thin films have better optical and electrical properties. This study aims to investigate the thermoelectric properties of two distinct semiconducting oxide thin films, namely SnO2 and F-doped SnO2 (FTO), by the nebulizer spray pyrolysis technique. An X-ray diffraction study reveals that the synthesized films exhibit a tetragonal structure with the (200) preferred orientation. The film structural quality increases from SnO2 to FTO due to the substitution of F− ions into the host lattice. The film thickness increases from 530 nm for SnO2 to 650 nm for FTO films. Room-temperature electrical resistivity decreases from (8.96 ± 0.02) × 10−2 Ω·cm to (4.64 ± 0.01) × 10−3 Ω·cm for the SnO2 and FTO thin films, respectively. This is due to the increase in the carrier density of the films, (2.92 ± 0.02) × 1019 cm−3 (SnO2) and (1.63 ± 0.03) × 1020 cm−3 (FTO), caused by anionic substitution. It is confirmed that varying the temperature (K) enhances the electron transport properties. The obtained Seebeck coefficient (S) increases as the temperature is increased, up to 360 K. The synthesized films exhibit the S value of −234 ± 3 μV/K (SnO2) and −204 ± 3 μV/K (FTO) at 360 K. The estimated power factor (PF) drastically increases from ~70 (μW/m·K2) to ~900 (μW/m·K2) for the SnO2 and FTO film, respectively. Full article
(This article belongs to the Special Issue Nanomaterials Based Catalysis and Energy Conversion)
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