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Advances in Heterojunction Photocatalysts, 2nd Edition
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Advances in Heterojunction Photocatalysts, 2nd Edition

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: closed (30 September 2024) | Viewed by 1390

Special Issue Editors

Dr. Yongming Fu

E-Mail Website
Guest Editor
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan 030006, China
Interests: photocatasis; piezoelectric; sensors; self-powered system
Special Issues, Collections and Topics in MDPI journals
Dr. Qian Zhang

E-Mail Website
Guest Editor
School of Materials, Sun Yat-Sen University, Shenzhen 518107, China
Interests: catalysis; energy conversion; self-powered; sensors; shadow effect
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Semiconductor-based photocatalysis attracts wide attention because of its ability to directly utilize solar energy for the production of solar fuels such as hydrogen and hydrocarbon fuels and for the degradation of various pollutants. Properly engineered heterojunction photocatalysts are shown to be able to possess higher photocatalytic activity because of the spatial separation of photogenerated electron–hole pairs. Recently, five different heterojunctions have been investigated and proved to be efficient for enhancing the activity of photocatalysts: conventional type-II heterojunctions, p–n heterojunctions, surface heterojunctions, Z-scheme heterojunctions, and semiconductor–graphene heterojunctions. More efforts toward the development of heterojunction photocatalysts for various photocatalytic applications should be further presented and appraised.

This Special Issue entitled “Advances in Heterojunction Photocatalysts, 2nd Edition” will focus on the state of the art and outlooks for heterojunction photocatalysis. Submissions in the form of original research papers and review articles in areas of designing novel heterojunction materials, developing new synthetic methods, and finding new mechanisms for heterojunction photocatalysis are all welcomed. The scope of this Special Issue covers the whole applications of heterojunction photocatalysis, including but not limited to dye degradation, antibiotic mineralization, water splitting, solar fuels, carbon reduction, sterilization, photodynamic therapy, etc.

Dr. Yongming Fu
Dr. Qian Zhang
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. Catalysts 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 2200 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

  • heterojunction
  • photocatalysis
  • Z-scheme
  • carbon reduction
  • water splitting
  • solar fuels
  • photodynamic therapy
  • dye degradation
  • antibiotic mineralization
  • sterilization

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Related Special Issue

Published Papers (2 papers)

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25 pages, 7559 KiB  
Article
Effect of Plasma Treatment on Self-Cleaning Features of Acrylic Paint/TiO2-Coated Surfaces for Environmental Pollutant Removal
by Andrijana Bilić, Sanja J. Armaković, Mirjana V. Šiljegović, Milica Kisić, Maja Šćepanović, Mirjana Grujić-Brojčin, Nataša Simić, Lazar Gavanski, Stevan Armaković and Maria M. Savanović
Catalysts 2024, 14(11), 799; https://doi.org/10.3390/catal14110799 - 8 Nov 2024
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Abstract
This study investigates the characterization and performance of self-cleaning TiO2 surfaces synthesized through a one-step preparation process, followed by enhancement via plasma treatment. The process involved coating aluminum foil with an acrylic paint mixture containing nanoparticles of different mass compositions and subsequent [...] Read more.
This study investigates the characterization and performance of self-cleaning TiO2 surfaces synthesized through a one-step preparation process, followed by enhancement via plasma treatment. The process involved coating aluminum foil with an acrylic paint mixture containing nanoparticles of different mass compositions and subsequent plasma treatment using a continuous plasma arc. Scanning electron microscopy revealed the morphology of the treated surfaces, showing an increase in surface area of plasma-treated materials. Energy-dispersive X-ray spectroscopy revealed changes in oxygen and titanium in acrylic paint/TiO2 surfaces as the TiO2 content increased, indicating successful TiO2 incorporation. Raman spectroscopy showed that the bulk structure of self-cleaning acrylic paints is mainly preserved after plasma treatment. Alternating current impedance spectroscopy assessed that plasma treatment reduced agglomeration and increased active sites, especially for the acrylic paint/TiO2 surfaces with 0.5 mg/cm3 TiO2. The contact angle measurements indicated that plasma treatment enhanced the superhydrophobic characteristics and potential self-cleaning abilities of produced acrylic paint/TiO2 surfaces. The efficacy of these plasma-treated surfaces in self-cleaning was evaluated by testing their performance against puddle sediment and automotive oil samples. The study demonstrated that plasma treatment positively impacted the self-cleaning ability of the acrylic paint/TiO2 surfaces, particularly those with 0.5 mg/cm3 TiO2. This enhancement was attributed to the formation of functional groups, improved water repellency, and possible increases in surface area, which collectively contribute to the sustainable self-cleaning properties of the treated surfaces. Full article
(This article belongs to the Special Issue Advances in Heterojunction Photocatalysts, 2nd Edition)
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21 pages, 10946 KiB  
Article
Cu-TiO2/Zeolite/PMMA Tablets for Efficient Dye Removal: A Study of Photocatalytic Water Purification
by Sanja J. Armaković, Milinko Perić, Andrijana Bilić, Boris Brkić, Maja Šćepanović, Mirjana Grujić-Brojčin, Branislava Srđenović Čonić, Nebojša Kladar and Stevan Armaković
Catalysts 2024, 14(11), 746; https://doi.org/10.3390/catal14110746 - 23 Oct 2024
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Abstract
In this study, Cu-doped TiO2 combined with natural zeolite (ZT) was synthesized and applied as a fixed powder layer on poly(methyl methacrylate) (PMMA) tablets. The material’s morphology, structural, and chemical properties were characterized using high-resolution scanning electron microscopy, Raman spectroscopy, and Brunauer–Emmett–Teller [...] Read more.
In this study, Cu-doped TiO2 combined with natural zeolite (ZT) was synthesized and applied as a fixed powder layer on poly(methyl methacrylate) (PMMA) tablets. The material’s morphology, structural, and chemical properties were characterized using high-resolution scanning electron microscopy, Raman spectroscopy, and Brunauer–Emmett–Teller analysis. The antioxidant capacity was evaluated by assessing the neutralization of hydroxyl radicals and iron (III) ions. For the first time, tablets with Cu-TiO2 and ZT deposited on PMMA as the carrier were investigated for removing two dyes, methyl orange (MO) and methylene blue (MB), from water under simulated solar (SS) and UVC irradiation. Under SS irradiation, the Cu-TiO2/PMMA and Cu-TiO2/ZT/PMMA tablets achieved about 21% degradation of MB after 240 min. This result is particularly noteworthy because SS radiation provides lower energy compared with UVC, making the process more economically efficient. Furthermore, the photocatalysts are immobilized on a stable carrier, which enhances the method’s cost-effectiveness by reducing material loss and simplifying recovery. In the presence of ZT/PMMA tablets, 69% of MB was removed by adsorption after 240 min. Additionally, we explored the mechanism of degradation, revealing that the enhanced generation of hydroxyl radicals plays a pivotal role in the effective degradation of MB. At the same time, photogenerated holes contribute to the removal of MO. The overall results suggest that the tablets obtained are a promising solution for water purification due to their effectiveness, simplicity, and low processing cost. Full article
(This article belongs to the Special Issue Advances in Heterojunction Photocatalysts, 2nd Edition)
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