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Advanced Materials and Coatings for Photocatalytic Applications
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Advanced Materials and Coatings for Photocatalytic 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: closed (31 January 2025) | Viewed by 2515

Special Issue Editor

Dr. Zuoli He

E-Mail Website
Guest Editor
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
Interests: photocatalysis; heterojunction; wastewater treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Protecting the environment and achieving sustainable clean energy production are currently the main goals of human development policy. Photocatalysis could use durable, eco-friendly materials to solve energy and environmental problems. Photocatalysis is a technique that uses light energy to successfully initiate chemical reactions in order to breakdown harmful contaminants or produce fuels. Nonetheless, there are issues, such as the poor stability of nanocatalysts, the low efficiency of photogenerated carrier transport and separation, and unclear mechanisms of charge separation and transfer. Nanostructured photocatalysts are difficult to separate or recycle, and some metal ions from semiconductor photocatalysts are dissolved out by photocorrosion, which results in secondary pollution. Therefore, nano-sized semiconductor or polymer coatings have been grown on nanostructured photocatalysts, and these can accelerate carrier transport and separation or enhance the stability of catalysts. Therefore, cutting-edge materials and coatings have been employed to significantly increase stability and efficiency, which has accelerated the process of applying photocatalytic technology.

This Special Issue of Coatings, titled "Advanced Materials and Coatings for Photocatalytic Applications", attempts to evaluate the latest basic and advanced developments in advanced materials and coatings used in photocatalytic applications, including organic pollutant removal, wastewater treatment, VOCs and NOx elimination, H2 production, CO2 or N2 conversion, and so forth.

Dr. Zuoli He
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

  • photocatalysts
  • photoactive coatings/films
  • wastewater treatments
  • air purification
  • H2 production
  • photocorrosion
  • CO2 reduction

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Published Papers (2 papers)

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Research

16 pages, 3525 KiB  
Article
Engineering g-C3N4/Bi2WO6 Composite Photocatalyst for Enhanced Photocatalytic CO2 Reduction
by Wenxing Chen, Lingzhe Ni, Kenji Ogino, Hong Sun, Jinghui Bi and Huilin Hou
Coatings 2025, 15(1), 32; https://doi.org/10.3390/coatings15010032 - 2 Jan 2025
Viewed by 1023
Abstract
As global CO2 emissions continue to rise, addressing their environmental impact is critical in combating climate change. Photocatalytic CO2 reduction, which mimics natural photosynthesis by converting CO2 into valuable fuels and chemicals using solar energy, represents a promising approach for [...] Read more.
As global CO2 emissions continue to rise, addressing their environmental impact is critical in combating climate change. Photocatalytic CO2 reduction, which mimics natural photosynthesis by converting CO2 into valuable fuels and chemicals using solar energy, represents a promising approach for both reducing emissions and storing energy sustainably. However, the development of efficient photocatalysts, particularly those capable of absorbing visible light, remains a challenge. Graphitic carbon nitride (g-C3N4) has gained attention for its visible light absorption and chemical stability, though its performance is hindered by rapid electron–hole recombination. Similarly, bismuth tungstate (Bi2WO6) is a visible-light-active photocatalyst with promising properties, but also suffers from limited efficiency due to charge recombination. To overcome these limitations, this study focuses on the design and synthesis of a g-C3N4/Bi2WO6 composite photocatalyst, leveraging the complementary properties of both materials. The composite benefits from enhanced charge separation through the formation of a heterojunction, reducing recombination rates and improving overall photocatalytic performance. The optimized g-C3N4/Bi2WO6 composite exhibited significant improvements in the production rates of both CH4 and CO, achieving 18.90 and 17.78 μmol/g/h, respectively, which are 2.6 times and 1.6 times higher than those of pure Bi2WO6. The study explores how optimizing the g-C3N4/Bi2WO6 interface, increasing surface area, and adjusting material ratios can further enhance the efficiency of CO2 reduction. Our findings demonstrate the potential of this composite for solar-driven CO2 conversion, offering new insights into photocatalyst design and paving the way for future advancements in CO2 mitigation technologies. Full article
(This article belongs to the Special Issue Advanced Materials and Coatings for Photocatalytic Applications)
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20 pages, 20891 KiB  
Article
Efficient Photocatalytic Reduction of Hexavalent Chromium by NiCo2S4/BiOBr Heterogeneous Photocatalysts
by Shumeng Qin, Ruofan Xu, Qiu Jin, Sen Wang, Yi Ren, Yulin Huang, Ziye Zheng, Lihui Xiao, Dong Zhai, Shuguang Wang and Zuoli He
Coatings 2024, 14(12), 1492; https://doi.org/10.3390/coatings14121492 - 27 Nov 2024
Cited by 2 | Viewed by 928
Abstract
For typical Cr(VI)-containing industrial wastewater, more efficient water treatment technologies need to be used to ensure that Cr(VI) concentrations are reduced to safe levels before discharge. Photocatalytic technology is highly efficient, environmentally friendly, and has been extensively used to address this demand. Herein, [...] Read more.
For typical Cr(VI)-containing industrial wastewater, more efficient water treatment technologies need to be used to ensure that Cr(VI) concentrations are reduced to safe levels before discharge. Photocatalytic technology is highly efficient, environmentally friendly, and has been extensively used to address this demand. Herein, heterogeneous NiCo2S4/BiOBr photocatalysts with different ratios were prepared using a solvothermal method. When compared with pure NiCo2S4 and BiOBr, the NiCo2S4/BiOBr-30 had significantly increased adsorption capacity and visible-light-driven photocatalytic reduction activity for Cr(VI) removal. The improved adsorption performance of the NiCo2S4/BiOBr-30 was mainly due to its increased specific surface area, and the enhanced photocatalytic performance of the NiCo2S4/BiOBr-30 could be attributed to the improved separation and transfer of photogenerated carriers at the interface. Lastly, a possible enhanced photocatalytic Cr(VI) reduction mechanism of the NiCo2S4/BiOBr heterostructure was developed. Full article
(This article belongs to the Special Issue Advanced Materials and Coatings for Photocatalytic Applications)
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