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Coatings
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Coatings as Key Materials in Catalytic Applications
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Coatings as Key Materials in Catalytic Applications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 2610

Special Issue Editor

Prof. Dr. Wanping Chen

E-Mail Website
Guest Editor
School of Physics and Technology, Wuhan University, Wuhan 430072, China
Interests: metal oxides; gas sensing; material failure; tribocatalysis; photocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Catalytic technologies, including photo-catalysis, electro-catalysis, and recently tribo-catalysis, are becoming increasingly important in promoting the conversion of clean energies in nature to chemical energy in important applications such as environmental remediation and production of chemical fuels. For photo-catalysis, catalysts are sometimes fabricated as coatings on large-area substrates to increase the absorption of solar light; for electro-catalysis, coatings are often applied to catalysts to improve their performance, while for tribo-catalysis, coatings on vessel bottoms are able to greatly increase the absorption of mechanical energy by catalysts through creating friction with them. In all these cases, coatings play a vital role in achieving improved catalytic performance. While coatings are well known for their role in material protection, it is predicted that they will receive increasing attention for their critical roles in catalysis. In this Special Issue of Coatings, we plan to publish a series of papers to show those outstanding effects of coatings in catalysis.

Prof. Dr. Wanping Chen
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. Coatings 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

  • photo-catalytic
  • electro-catalytic
  • tribo-catalytic
  • degradation of organic pollutants
  • splitting of water
  • reduction of CO2
  • coatings

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Published Papers (3 papers)

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Research

15 pages, 2608 KiB  
Article
Photocatalytic Degradation of Sulfamethoxazole by Cd/Er-Doped Bi2MoO6
by Nengxun Yang, Yixuan Niu, Bohang Zhang and Fuchun Zhang
Coatings 2024, 14(9), 1112; https://doi.org/10.3390/coatings14091112 - 2 Sep 2024
Viewed by 489
Abstract
Bi2MoO6 (BMO) is a typical bismuth-based semiconductor material, and its unique Aurivillius structure provides a broad space for electron delocalization. In this study, a new type of bismuth molybdate Cd/Er-BMO photocatalytic material was prepared by co-doping Er3+ and Cd [...] Read more.
Bi2MoO6 (BMO) is a typical bismuth-based semiconductor material, and its unique Aurivillius structure provides a broad space for electron delocalization. In this study, a new type of bismuth molybdate Cd/Er-BMO photocatalytic material was prepared by co-doping Er3+ and Cd2+, and the performance of the photocatalytic degradation of sulfamethoxazole (SMZ) was systematically studied. The research results showed that the efficiency of SMZ degradation by Cd/Er-BMO was significantly improved after doping Er3+ and Cd2+ ions, reflecting the synergistic catalytic effect of Cd2+ and Er3+ co-doping. Cd/Er-BMO doped with 6% Cd had the highest degradation efficiency (93.89%) of SMZ under visible light irradiation. The material revealed excellent stability and reusability in repeated degradation experiments. In addition, 6% Cd/Er-BMO had a smaller particle size and a larger specific surface area, which is conducive to improving the generation efficiency of its photogenerated electron-hole pairs and reducing the recombination rate, significantly enhancing the photocatalysis of the material. This study not only provides an effective photocatalyst for degrading environmental pollutants such as SMZ, but also provides an important scientific basis and new ideas for the future development of efficient and stable photocatalytic materials. Full article
(This article belongs to the Special Issue Coatings as Key Materials in Catalytic Applications)
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11 pages, 8007 KiB  
Article
Surprising Effects of Al2O3 Coating on Tribocatalytic Degradation of Organic Dyes by CdS Nanoparticles
by Senhua Ke, Chenyue Mao, Ruiqing Luo, Zeren Zhou, Yongming Hu, Wei Zhao and Wanping Chen
Coatings 2024, 14(8), 1057; https://doi.org/10.3390/coatings14081057 - 18 Aug 2024
Viewed by 734
Abstract
With a band gap of 2.4 eV, CdS has been extensively explored for photocatalytic applications under visible light irradiation. In this study, CdS nanoparticles have been investigated for the tribocatalytic degradation of concentrated Rhodamine B (RhB) and methyl orange (MO) solutions. For CdS [...] Read more.
With a band gap of 2.4 eV, CdS has been extensively explored for photocatalytic applications under visible light irradiation. In this study, CdS nanoparticles have been investigated for the tribocatalytic degradation of concentrated Rhodamine B (RhB) and methyl orange (MO) solutions. For CdS nanoparticles in a glass beaker, 78.9% of 50 mg/L RhB and 69.8% of 20 mg/L MO solutions were degraded after 8 h and 24 h of magnetic stirring using Teflon magnetic rotary disks, respectively. While for CdS nanoparticles in a beaker with Al2O3 coated on its bottom, 99.8% of the RhB solution was degraded after 8 h of magnetic stirring and 95.6% of the MO solution was degraded after 12 h of magnetic stirring. Moreover, another contrast was observed between the two beaker bottoms—a new peak at 250 nm in UV–visible absorption spectra was only observed for the MO degradation by CdS in the as-received glass beaker, which indicates that MO molecules were only broken into smaller organic molecules in that case. These findings are meaningful for expanding the catalytic applications of CdS and for achieving a better understanding of tribocatalysis as well. Full article
(This article belongs to the Special Issue Coatings as Key Materials in Catalytic Applications)
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11 pages, 5551 KiB  
Article
Catalytic Activity Evaluation of Molten Salt-Treated Stainless Steel Electrodes for Hydrogen Evolution Reaction in Alkaline Medium
by Michihisa Fukumoto, Hiroki Takahashi, Dawid Kutyła, Marek Wojnicki and Piotr Żabiński
Coatings 2024, 14(7), 796; https://doi.org/10.3390/coatings14070796 - 26 Jun 2024
Viewed by 1103
Abstract
The goal of this research is to fabricate a novel type of highly active porous electrode material, based on stainless steel and dedicated to water electrolyzers. The main novelty of the presented work is the innovative application of the molten salts treatment, which [...] Read more.
The goal of this research is to fabricate a novel type of highly active porous electrode material, based on stainless steel and dedicated to water electrolyzers. The main novelty of the presented work is the innovative application of the molten salts treatment, which allows the design of a highly developed porous structure, which characterizes significantly higher catalytic activity than untreated steel substrates. The equimolar mixture of NaCl and KCl with 3.5 mol% AlF3 was used as the molten salt. The surface modification procedure includes the deposition of an Al layer with application at the potential of −1.8 V and following dissolution at −0.9 V, to create a porous alloy surface. The cathodic polarization measurements of the prepared porous stainless steel electrodes were measured in a 10 mass% KOH solution. Moreover, the amount of hydrogen generated during constant voltage electrolysis with a hydrogen sensor in situ was also measured. The porous stainless steel alloy showed higher current density at lower potentials in the cathodic polarization compared to untreated stainless steel. The cathodic polarization measurements in alkaline solution showed that the porous 304 stainless steel alloy is an excellent cathode material. Full article
(This article belongs to the Special Issue Coatings as Key Materials in Catalytic Applications)
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