High-Efficiency Catalyst Preparation and Application in Environmental Purification

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Purification Technology".

Deadline for manuscript submissions: closed (10 December 2023) | Viewed by 1040

Special Issue Editor

Department of Environmental Engineering, School of Resources and Environmental Science, Hubei University, Wuhan 430062, China
Interests: heterogeneous catalysis; environmental catalytic materials; advanced oxidation processes (AOPs)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Currently, air and water pollution are just two of the serious environmental problems facing mankind during the rapid development of industrialization. To address this issue, the application of catalysts in chemical oxidation/advanced oxidation processes (AOPs) has emerged as a practice that has been paid increased attention in refractory pollutant abatement due to its practical and potential values in environmental purification.

Catalytic technology has undoubtedly led the scientific advancement of catalysts and catalytic processes over the past few decades. Inside, catalysis in chemical oxidation/AOPs plays an important role by degrading contaminants, ideally into carbon dioxide and water, without additional waste or byproducts. Thus, this process has promise as a technology to improve catalytic oxidation performance and shorten reaction times owing to its high efficiency and versatility, simplicity, and environmental compatibility.

Therefore, it is my pleasure to invite you to contribute your research articles, communications, and reviews to this upcoming Special Issue of Separations, entitled “High-Efficiency Catalyst Preparation and Application in Environmental Purification” and dedicated to highlighting promising recent research and novel trends in the application of catalysts in chemical oxidation/AOPs for environmental purification (mainly for water or wastewater). Areas within the scope of this include but are not limited to, the design, discovery and preparation of novel catalysts, catalytic technologies for organic removal, as well as the deep exploration of the mechanism of catalysis.

Dr. Yin Xu
Guest Editor

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Keywords

  • catalysts
  • heterogeneous catalysis
  • advanced oxidation processes (AOPs)
  • electrochemical AOPs
  • photocatalysis
  • catalytic mechanism
  • water treatment

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Published Papers (1 paper)

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Research

15 pages, 3796 KiB  
Article
Visible Light-Assisted Periodate Activation Using Carbon Nitride for the Efficient Elimination of Acid Orange 7
by Wenjun Xu, Qianyi Wang, Jintao He, Fuzhen Liu, Xiang Yan and Yin Xu
Separations 2024, 11(9), 274; https://doi.org/10.3390/separations11090274 - 19 Sep 2024
Viewed by 731
Abstract
The development of appropriate and effective periodate (PI) activation technology is currently a popular research area. This study presents a novel efficient photocatalytic activation approach of PI for pollutant degradation based on carbon nitride (g-C3N4) and visible light (Vis). [...] Read more.
The development of appropriate and effective periodate (PI) activation technology is currently a popular research area. This study presents a novel efficient photocatalytic activation approach of PI for pollutant degradation based on carbon nitride (g-C3N4) and visible light (Vis). The results show that the system can remove 92.3% of acid orange 7 (AO7) within 60 min under the g-C3N4/PI/Vis reaction system. The degradation rate constant (kobs) reached 4.08 × 10−2 min−1, which is 4.21, 5.16 times, and 51.3 times higher than that of the g-C3N4/Vis system (9.7 × 10−3 min−1), PI/Vis system (7.9 × 10−3 min−1) and the g-C3N4/PI system (7.96 × 10−4 min−1), respectively. Clearly, the addition of PI significantly enhances the degradation efficiency of AO7 in the system. Additionally, under the same reaction conditions, the presence of PI showed excellent oxidation capacity in the photoactivation process compared with other common oxidants, such as peroxymonosulfate, peroxydisulfate, and H2O2. Moreover, the g-C3N4/PI/Vis system showed excellent removal of AO7 across a wide range of pH levels and in the presence of various anions. Electron paramagnetic resonance (EPR) and quenching experiments suggested that the superoxide anions (O2) and singlet oxygen (1O2) dominated in the oxidation of pollutants in the g-C3N4/PI/Vis system. In addition, the catalyst showed relative stability during cyclic testing, although a slight reduction in degradation efficiency was observed. In brief, the g-C3N4/PI/Vis system is highly efficient and environmentally friendly, with significant application potential in wastewater treatment. Full article
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