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Catalysts
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Advances in Enhancement of Catalytic Performance for Wastewater Treatment
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Advances in Enhancement of Catalytic Performance for Wastewater Treatment

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

Deadline for manuscript submissions: closed (31 March 2025) | Viewed by 1711

Special Issue Editors

Prof. Dr. Longjun Xu

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Guest Editor
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
Interests: wastewater treatment; degradation; photocatalytic activities; nanosheet; photocatalysis
Dr. Qi Feng

E-Mail
Guest Editor
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
Interests: catalysis; wastewater treatment; biodegradation; photocatalysis nanosheet; nanoparticle; fuel cell

Special Issue Information

Dear Colleagues,

Water is a basic resource that is necessary for all living beings on the planet. However, the scarcity and contamination of water means that millions of people have limited access to it. Water pollution may occur through the introduction of chemicals into water bodies as a result of various human activities. Any amount of chemicals pollute the water, regardless of the harm they may pose to human health and the environment.

The focus of this Special Issue is to provide a general overview of the main concepts and current advances in the environmental catalysis field, including the use of catalytic processes as alternative treatment methods for aqueous pollutants, such as pesticides, herbicides, and numerous industrial chemicals, with regard to water remediation. Original research papers and short reviews addressing the synthesis and characterization of new heterogeneous catalysts, the influences of different operating parameters and reactor types, the reaction kinetics, and the mechanisms and identification of intermediates are invited for submission.

Prof. Dr. Longjun Xu
Dr. Qi Feng
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

  • catalytic processes
  • advanced oxidation processes
  • wastewater treatment
  • toxic-refractory wastewaters
  • synthesis of catalysts
  • reaction kinetics and mechanisms
  • identification of intermediates
  • low-cost catalysts
  • stability of heterogeneous catalysts

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

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18 pages, 2996 KiB  
Article
Bacterial Inactivation and Organic Pollutant Degradation in Slaughterhouse Wastewater Using Ag2O/Ba/TiO2 Nanocomposite
by Habib Ullah, Izhar Elahi, Sahar Saleem, Rab Nawaz, Shafi Ullah, Samia Qadeer, Bilal Kabeer, Muzammil Anjum, Yi Liu, Asfandyar Shahab, Abubakr M. Idris and Zepeng Rao
Catalysts 2025, 15(5), 411; https://doi.org/10.3390/catal15050411 - 23 Apr 2025
Viewed by 368
Abstract
Slaughterhouses generate a huge amount of highly polluted wastewater; if left untreated, this effluent could seriously threaten the environment and human health. In the present study, Ag2O/Ba/TiO2 nanocomposite was synthesized using the precipitation method, and its efficacy was investigated for [...] Read more.
Slaughterhouses generate a huge amount of highly polluted wastewater; if left untreated, this effluent could seriously threaten the environment and human health. In the present study, Ag2O/Ba/TiO2 nanocomposite was synthesized using the precipitation method, and its efficacy was investigated for the remediation of real slaughterhouse wastewater (SWW) under visible light. Its performance was assessed for the inactivation of bacterial strains identified in SWW and for the degradation of total organic solids, volatile solids, fixed solids, and heavy metals. The results indicated an excellent photocatalytic performance of the synthesized Ag2O/Ba/TiO2 nanocomposites, confirmed by 87.3% volatile solids, 30% total organic solids, and 40% fixed solids removal from SWW. The zone of inhibition runs from 4 to 9 mm, and the nanocomposites have demonstrated outstanding bacterial inactivation activity in this range. It has been shown that the synthetic Ag2O/Ba/TiO2 nanocomposites can function as an effective photocatalyst for the remediation of SWW and other waste products produced by various industries worldwide. Full article
(This article belongs to the Special Issue Advances in Enhancement of Catalytic Performance for Wastewater Treatment)
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24 pages, 9225 KiB  
Article
Synthesis and Mechanism of Z-Scheme Heterojunction Photocatalyst MoS2-WO3
by Yuan Lu, Xinyu Wang, Yu Zhang, Siyuan Ren, Yukun Mei and Longjun Xu
Catalysts 2025, 15(1), 3; https://doi.org/10.3390/catal15010003 - 24 Dec 2024
Viewed by 840
Abstract
A novel spherical MoS2/WO3 composite was fabricated via a hydrothermal method for the photocatalytic degradation of RhB from wastewater. The structure and morphology of the photocatalyst were systematically characterized. The MoS2/WO3 nanospheres formed a p-n heterojunction, with [...] Read more.
A novel spherical MoS2/WO3 composite was fabricated via a hydrothermal method for the photocatalytic degradation of RhB from wastewater. The structure and morphology of the photocatalyst were systematically characterized. The MoS2/WO3 nanospheres formed a p-n heterojunction, with charge migration following a Z-scheme mechanism. The MoS2/WO3 composites exhibited superior photocatalytic activity, achieving a 94.5% degradation rate for RhB in just 60 min under visible light irradiation, far surpassing the performance of pure WO3 and MoS2. This enhanced activity was attributed to the improved charge separation efficiency and redox capacity, enabled by the unique “layer–bending layer” growth mode. The composite’s transfer resistance (Rct) was as low as 7.42 × 102 Ω, promoting faster electrochemical reactions. With a maximum photocurrent density of 87 μA·cm−2, the composite rapidly separated photogenerated electron–hole pairs. The primary reactive species in the photocatalytic reaction were ·OH and O2−, with h+ playing a secondary role. Full article
(This article belongs to the Special Issue Advances in Enhancement of Catalytic Performance for Wastewater Treatment)
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Review

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31 pages, 2489 KiB  
Review
Current Progress in Advanced Oxidation Processes for the Removal of Contaminants of Emerging Concern Using Peracetic Acid as an Effective Oxidant
by Bakhta Bouzayani, Sourour Chaâbane Elaoud and Maria Ángeles Sanromán
Catalysts 2025, 15(5), 469; https://doi.org/10.3390/catal15050469 - 10 May 2025
Viewed by 162
Abstract
The growing diversity and prevalence of contaminants of emerging concern (CECs) in aquatic environments present significant risks to human health and ecosystems, necessitating the development of effective remediation strategies. Advanced oxidation processes (AOPs) have emerged as a promising solution due to their ability [...] Read more.
The growing diversity and prevalence of contaminants of emerging concern (CECs) in aquatic environments present significant risks to human health and ecosystems, necessitating the development of effective remediation strategies. Advanced oxidation processes (AOPs) have emerged as a promising solution due to their ability to produce highly reactive species that efficiently degrade persistent contaminants. Among the various oxidizing agents, peracetic acid (PAA) has attracted significant attention in the field of water treatment for its powerful oxidative properties, environmentally safe decomposition, and ease of use. This article is designed to offer a comprehensive overview of the latest trends in PAA-based AOPs. The discussion begins with an overview of the intrinsic performance of PAA, emphasizing its oxidation potential and degradation mechanisms. Subsequently, the effectiveness of PAA-based AOPs in remediating CECs is explored, focusing on transition metal-mediated activation (Fe, Co, Mn), UV irradiation, and carbon-based catalysts, all of which enhance the generation of reactive species (RS). Next, the determination of RS in PAA-based AOPs is examined, distinguishing between free radical (organic and inorganic) and non-radical (singlet oxygen and high-valent metal) mechanisms that govern pollutant degradation. Then, key factors affecting the removal of CECs in PAA-based AOPs, including initial PAA concentration, catalyst dosage, and pH, are also addressed. Following that, the potential by-products and hazard assessments associated with PAA oxidation are discussed. Finally, current challenges and future research directions are proposed to facilitate the large-scale application of PAA-based AOPs in water remediation. Full article
(This article belongs to the Special Issue Advances in Enhancement of Catalytic Performance for Wastewater Treatment)
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