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Molecules
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Preparation and Application of Nano-Photocatalytic Materials
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Preparation and Application of Nano-Photocatalytic Materials

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 2922

Special Issue Editor

Dr. Chunbo Liu

E-Mail Website
Guest Editor
Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, Jilin Normal University, Changchun 130103, China
Interests: photocatalysis; nanomaterials; water treatment; antibacterial; energy

Special Issue Information

Dear Colleagues,

The development of Nano Photocatalysis Technology has scientific potential since it possesses several merits, e.g., efficiency, green and economic. The nano photocatalysis materials can be stimulated to generate carriers (electron and hole) and their secondary free radicals (hydroxyl radical, singlet oxygen, superoxide radicals, etc.) with strong redox ability. The carriers and free radicals can react with the surrounding water and oxygen, and decompose formaldehyde, benzene, dyes and other pollutants, and destroy the cell wall of bacteria, so as to achieve the purpose of eliminating air pollution, antibacterial, environmental water restoration and clean energy production. Some researchers have been placing special emphasis on the mechanisms of nano-photocatalytic reaction and designing experimental systems to optimize the photocatalysis activity of nano-photocatalytic materials, which will open up a new avenue for the preparation and application of nano-photocatalytic materials.

Dr. Chunbo Liu
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. 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

  • photocatalysis
  • nanomaterials
  • water treatment
  • antibacterial
  • energy

Published Papers (2 papers)

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Research

11 pages, 4892 KiB  
Article
Investigating the Reduction/Oxidation Reversibility of Graphene Oxide for Photocatalytic Applications
by László Péter Bakos, Marcell Bohus and Imre Miklós Szilágyi
Molecules 2023, 28(11), 4344; https://doi.org/10.3390/molecules28114344 - 25 May 2023
Cited by 1 | Viewed by 1089
Abstract
The aim of the study was to analyze the reversibility of the cycle of graphene oxide (GO), reduced GO, and GO obtained by consecutive reoxidation of reduced GO. Accordingly, GO was heated in three different atmospheres (oxidizing, inert, and reducing, i.e., air, nitrogen, [...] Read more.
The aim of the study was to analyze the reversibility of the cycle of graphene oxide (GO), reduced GO, and GO obtained by consecutive reoxidation of reduced GO. Accordingly, GO was heated in three different atmospheres (oxidizing, inert, and reducing, i.e., air, nitrogen, and argon/hydrogen mixture, respectively) at 400 °C to obtain reduced GO with varying composition. The bare GO and the RGO samples were oxidized or reoxidized with HNO3. The thermal properties, composition, bonds, and structure of the samples were investigated with TG/DTA, EDX, Raman spectroscopy, and XRD. Their photocatalytic activity was tested by decomposing methyl orange dye under UV light irradiation. Full article
(This article belongs to the Special Issue Preparation and Application of Nano-Photocatalytic Materials)
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16 pages, 5003 KiB  
Article
Construction of S-Scheme CuS/Bi5O7I Heterojunction for Boosted Photocatalytic Disinfection with Visible Light Exposure
by Zhanqiang Ma, Wei Guo, Kaiyue Zhang, Nan Wang, Ziyue Li and Juan Li
Molecules 2023, 28(7), 3084; https://doi.org/10.3390/molecules28073084 - 30 Mar 2023
Cited by 3 | Viewed by 1540
Abstract
In this paper, a novel S-scheme CuS/Bi5O7I heterojunction was successfully constructed using a two-step approach comprising the alkaline hydrothermal method and the adsorption–deposition method, and it consisted of Bi5O7I microrods with CuS particles covering the [...] Read more.
In this paper, a novel S-scheme CuS/Bi5O7I heterojunction was successfully constructed using a two-step approach comprising the alkaline hydrothermal method and the adsorption–deposition method, and it consisted of Bi5O7I microrods with CuS particles covering the surface. The photocatalytic antibacterial effects on Escherichia coli (E. coli) were systematically examined with visible light exposure. The results suggested that the 3%-CuS/Bi5O7I composite showed the optimal antibacterial activity, completely inactivating E. coli (5 × 108 cfu/mL) in 180 min of irradiation. Moreover, the bacterial inactivation process was scientifically described. •O2− and h+ were the major active species for the inactivation of the bacteria. In the early stages, SOD and CAT initiated the protection system to avoid the oxidative destruction of the active species. Unfortunately, the antioxidant protection system was overwhelmed thereafter, which led to the destruction of the cell membrane, as evidenced by the microstructure changes in E. coli cells. Subsequently, the leakage of intracellular components including K+, proteins, and DNA resulted in the unavoidable death of E. coli. Due to the construction of the S-scheme heterojunction, the CuS/Bi5O7I composite displayed the boosted visible light harvesting, the high-efficiency separation of photogenerated electrons and holes, and a great redox capacity, contributing to an outstanding photocatalytic disinfection performance. This work offers a new opportunity for S-scheme Bi5O7I-based heterojunctions with potential application in water disinfection. Full article
(This article belongs to the Special Issue Preparation and Application of Nano-Photocatalytic Materials)
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