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Catalysts
Special Issues
Recent Advances in Photocatalytic Treatment of Pollutants in Water
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Recent Advances in Photocatalytic Treatment of Pollutants in Water

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

Deadline for manuscript submissions: 30 November 2024 | Viewed by 829

Special Issue Editors

Dr. Xiufang Chen

E-Mail Website
Guest Editor
National & Local Joint Engineering Research Center for Textile Fiber Materials and Processing Technology, College of Material Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: photocatalysis; photocatalytic environmental purification; photocatalytic organic synthesis; development of photocatalytic nanomaterials
Special Issues, Collections and Topics in MDPI journals
Dr. Zhexin Zhu

E-Mail Website
Guest Editor
National & Local Joint Engineering Research Center for Textile Fiber Materials and Processing Technology, College of Material Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: Fenton-like photocatalysis; detection of organic pollutants and degradation products; integration of advanced oxidation technologies and biological processes for industrial wastewater treatment; advanced treatment of water and wastewater
Dr. Yinsong Si

E-Mail Website
Guest Editor
National & Local Joint Engineering Research Center for Textile Fiber Materials and Processing Technology, College of Material Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: synthesis of nanoporous photocatalysts; photocatalytic hydrogen production; microsphere-nanofiber composites; biomimetic catalytic structure; organic pollutants and wastewater treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Organic pollutants are widely dispersed in industrial wastewater and have caused widespread environmental concerns. Photocatalysis has been a hotspot of research as an environmentally benign, low-cost and highly efficient approach to the decomposition of organic pollutants.

This Special Issue of Catalysts will cover the recent advancements in photocatalyst development, water environmental remediation applications, industrial wastewater treatment, reaction mechanisms, and modeling processes for water decontamination. The Guest Editors encourage submissions in the following areas:

  • The development of photocatalytic materials;
  • Photocatalytic-based process degradation of emerging contaminants in wastewater;
  • Wastewater recycling and repurposing via photocatalysts;
  • Disinfection and decontamination via advanced oxidation processes (photocatalysis-, ozone, UV, H2O2 and PMS-based processes);
  • Photocatalytic degradation processes and intermediates of emerging contaminants in wastewater.

If you would like to submit papers for publication in this Special Issue or have any questions, please contact the in-house editor, Mr. Ives Liu ([email protected]).

Dr. Xiufang Chen
Dr. Zhexin Zhu
Dr. Yinsong Si
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 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

  • photocatalytic nanomaterial
  • advanced oxidation technology
  • environmental photocatalysis
  • degradation mechanism
  • wastewater treatment

Published Papers (2 papers)

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Research

17 pages, 2480 KiB  
Article
Impact of Inorganic Anions on the Photodegradation of Herbicide Residues in Water by UV/Persulfate-Based Advanced Oxidation
by Gabriel Pérez-Lucas, Aitor Campillo and Simón Navarro
Catalysts 2024, 14(6), 376; https://0-doi-org.brum.beds.ac.uk/10.3390/catal14060376 - 13 Jun 2024
Viewed by 444
Abstract
The removal of pesticides and other organic pollutants from water through advanced oxidation processes (AOPs) holds great promise. The main advantage of these technologies is that they remove, or at least reduce, pesticide levels by mineralization rather than transfer, as in conventional processes. [...] Read more.
The removal of pesticides and other organic pollutants from water through advanced oxidation processes (AOPs) holds great promise. The main advantage of these technologies is that they remove, or at least reduce, pesticide levels by mineralization rather than transfer, as in conventional processes. This study first evaluated the effectiveness of UV/S2O8= compared to heterogeneous photocatalysis using UV/TiO2 processes on the degradation of two commonly used herbicides (terbuthylazine and isoproturon) in aqueous solutions using a laboratory photoreactor. In addition, the effect of the UV wavelength on the degradation efficiency of both herbicides was investigated. Although the degradation rate was greater under UV(254)/S2O8= nm than under UV(365)/S2O8= nm, complete degradation of the herbicides (0.2 mg L−1) was achieved within 30 min under UV-366 nm using a Na2S2O8 dose of 250 mg L−1 in the absence of inorganic anions. To assess the impact of the water matrix, the individual and combined effects of sulfate (SO4=), bicarbonate (HCO3−), and chloride (Cl−) were evaluated. These can react with hydroxyl (HO•) and sulfate (SO4•−) radicals generated during AOPs to form new radicals with a lower redox potential. The results showed negligible effects of SO4=, while the combination of HCO3− and Cl− seemed to be the key to the decrease in herbicide removal efficiency found when working with complex matrices. Finally, the main intermediates detected during the photodegradation process are identified, and the likely pathways involving dealkylation, dechlorination, and hydroxylation are proposed and discussed. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalytic Treatment of Pollutants in Water)
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14 pages, 4457 KiB  
Article
TiO2/p-BC Composite Photocatalyst for Efficient Removal of Tetracycline from Aqueous Solutions under Simulated Sunlight
by Jianhui Liu, Liwen Zheng, Yongchao Gao, Lei Ji, Zhongfeng Yang, Hailun Wang, Ming Shang, Jianhua Du and Xiaodong Yang
Catalysts 2024, 14(6), 357; https://0-doi-org.brum.beds.ac.uk/10.3390/catal14060357 - 31 May 2024
Viewed by 211
Abstract
Pollution caused by antibiotics has brought significant challenges to the ecological environment. To improve the efficiency of the removal of tetracycline (TC) from aqueous solutions, a composite material consisting of TiO2 and phosphoric acid-treated peanut shell biochar (p-BC) has been successfully synthesized [...] Read more.
Pollution caused by antibiotics has brought significant challenges to the ecological environment. To improve the efficiency of the removal of tetracycline (TC) from aqueous solutions, a composite material consisting of TiO2 and phosphoric acid-treated peanut shell biochar (p-BC) has been successfully synthesized in the present study by the sol-gel method. In addition, the composite material was characterized using various techniques, including scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) spectroscopy, X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, and ultraviolet–visible diffuse reflectance spectroscopy (UV-vis DRS). The XPS and FTIR analyses revealed the formation of a new Ti–O–C bond, while the XRD analysis confirmed the presence of TiO2 (with an anatase phase) in the composite material. Also, the PL analyses showed a notable decrease in the recombination efficiency of electrons and holes, which was due to the formation of a composite. This was further supported by the UV-vis DRS analyses, which revealed a decrease in bandgap (to 2.73 eV) of the composite material and led to enhanced light utilization and improved photocatalytic activity. Furthermore, the effects of pH, composite dosage, and initial concentration on the removal of TC were thoroughly examined, which resulted in a maximum removal efficiency of 95.3% under optimal conditions. Additionally, five consecutive cycle tests demonstrated an exceptional reusability and stability of the composite material. As a result of the experiments, the active species verified that ·O2− played a key role in the photodegradation of TC. Four possible degradation pathways of TC were then proposed. As a general conclusion, the TiO2/p–BC composite can be used as an efficient photocatalyst in the removal of TC from aqueous solutions. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalytic Treatment of Pollutants in Water)
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