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Molecules
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Advances in Photocatalytic Degradation of Organic Pollutants
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Advances in Photocatalytic Degradation of Organic Pollutants

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

Deadline for manuscript submissions: 31 December 2025 | Viewed by 2873

Special Issue Editors

Dr. Qianqian Liu

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Guest Editor
Suzhou Key Laboratory for Nanophotonic and Nanoelectronic Materials and Its Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
Interests: photocatalysis; function materials; wastewater purification; battery; hydrogen production; CO2 reduction
Dr. Quan Zhang

E-Mail Website
Guest Editor
Institute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
Interests: photocatalysis; electrocatalysis; material synthesis; hydrogen production; CO2 reduction
Dr. Jing Ding

E-Mail Website
Guest Editor
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
Interests: photocatalysis; function materials; wastewater purification; hydrogen production; CO2 reduction

Special Issue Information

Dear Colleagues,

With the development of modern society, environmental pollution has become the focus of world attention. Photocatalysis has garnered considerable attention as a promising way to deal with this issue. The exploration of potential photocatalysts with ideal photoactivity and preferable stability is key. Therefore, it is crucial to develop economical and efficient semiconductor photocatalysts for the degradation of organic pollutants. This Special Issue welcomes the submission of research papers about advances in photocatalytic degradation of organic pollutants, including but not limited to the following: (1) advanced photocatalyst for the degradation of organic pollutants; (2) theoretical study of the degradation of organic pollutants; (3) innovative techniques for the degradation of organic pollutants; and (4) other potential applications, such as photocatalytic water splitting, photocatalytic reduction of CO2, and so on.

Dr. Qianqian Liu
Dr. Quan Zhang
Dr. Jing Ding
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. 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
  • photocatalytic degradation of organic pollutants
  • functional materials
  • semiconductor photocatalysts
  • DFT

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Published Papers (2 papers)

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Research

18 pages, 11000 KiB  
Article
Efficient Degradation of Methylene Blue in Industrial Wastewater and High Cycling Stability of Nano ZnO
by Ping Liang, Weiye Yang, Hongyan Peng and Shihua Zhao
Molecules 2024, 29(23), 5584; https://doi.org/10.3390/molecules29235584 - 26 Nov 2024
Cited by 2 | Viewed by 1228
Abstract
Photocatalytic degradation research has attracted significant attention in the wake of the increasingly severe global challenge of water pollution. In this study, nano-ZnO was synthesized through a straightforward method using zinc acetate anhydrous as the precursor. The experimental results revealed that annealing conditions [...] Read more.
Photocatalytic degradation research has attracted significant attention in the wake of the increasingly severe global challenge of water pollution. In this study, nano-ZnO was synthesized through a straightforward method using zinc acetate anhydrous as the precursor. The experimental results revealed that annealing conditions significantly influenced the bandgap energy (Eg) of ZnO, with a positive correlation observed between the intensity of photoluminescence (PL) spectra and photocatalytic activity. Under optimal annealing conditions at 300 °C for 1.5 h, the photocatalytic degradation efficiency of methylene blue (MB) exceeded 98% within 40 min of ultraviolet (UV) irradiation, surpassing the efficiencies reported for ZnO in recent studies. This high performance underscores the excellent photocatalytic activity of the synthesized ZnO samples. Furthermore, after five photocatalytic cycles, the degradation efficiency of MB remained above 90%, and the crystalline structure of the ZnO samples remained stable, demonstrating their exceptional structural stability during the photocatalytic process. Additionally, this study examined the effects of stirring conditions and different light sources on MB degradation, providing valuable insights for future research in related fields. Full article
(This article belongs to the Special Issue Advances in Photocatalytic Degradation of Organic Pollutants)
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17 pages, 5519 KiB  
Article
Photocatalytic Enhancement and Recyclability in Visible-Light-Responsive 2D/2D g-C3N4/BiOI p-n Heterojunctions via a Z-Scheme Charge Transfer Mechanism
by Shuo Yang, Tianna Wu, Kaiyue Li, Ping Huang, Wenhui Li, Yuquan Zhuo, Keyan Liu, Ziwen Yang and Donglai Han
Molecules 2024, 29(22), 5418; https://doi.org/10.3390/molecules29225418 - 17 Nov 2024
Cited by 2 | Viewed by 1218
Abstract
With the intensification of the energy crisis and the growing concern over environmental pollution, particularly the discharge of organic dye pollutants in industrial wastewater, photocatalytic degradation of these contaminants using solar energy has emerged as an effective, eco-friendly solution. In this study, we [...] Read more.
With the intensification of the energy crisis and the growing concern over environmental pollution, particularly the discharge of organic dye pollutants in industrial wastewater, photocatalytic degradation of these contaminants using solar energy has emerged as an effective, eco-friendly solution. In this study, we successfully synthesized 2D/2D g-C3N4/BiOI p-n heterojunctions via a simple precipitation method and a high-temperature calcination method. The unique 2D structures of g-C3N4 nanosheets (NSs) and BiOI NSs, coupled with the synergistic effect between the two materials, significantly enhanced the photocatalytic degradation performance of the heterojunctions under simulated sunlight. The band structures, as determined by Tauc curves, Mott–Schottky curves and XPS-VB analysis, revealed a Z-scheme charge transfer mechanism that efficiently reduced charge carrier recombination and improved electron–hole separation. The photocatalytic activity of 2D/2D g-C3N4/BiOI p-n heterojunctions for rhodamine B (Rh B) degradation reached 99.7% efficiency within 60 min, a 2.37-fold and 1.27-fold improvement over pristine BiOI NSs and g-C3N4 NSs, respectively. Furthermore, the heterojunction exhibited excellent recyclability stability, with the degradation efficiency decreasing by only 1.2% after five cycles. Radical scavenging experiments confirmed the involvement of superoxide radicals (∙O2−) and hydroxyl radicals (∙OH) as the primary reactive species in the degradation process. This work highlights the potential of 2D/2D g-C3N4/BiOI p-n heterojunctions for efficient photocatalytic applications in environmental remediation. Full article
(This article belongs to the Special Issue Advances in Photocatalytic Degradation of Organic Pollutants)
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