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Utilizing MXene-mediated electron transfer pathway to boost peroxymonosulfate activation for water purification.

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Title: Utilizing MXene-mediated electron transfer pathway to boost peroxymonosulfate activation for water purification.
Authors: Li, Bin1 (AUTHOR), Sun, Li-Ming1 (AUTHOR), Li, Ang1 (AUTHOR), Liu, Chang1 (AUTHOR), He, Zi-Hang1 (AUTHOR), Zhang, Yi-Jun1 (AUTHOR), Huang, Yu-Xi1,2 (AUTHOR) huangyx253@mail.sysu.edu.cn, Zhang, Xing1 (AUTHOR) xing.zhang@ahu.edu.cn
Source: Separation & Purification Technology. Apr2025:Part A, Vol. 356, pN.PAG-N.PAG. 1p.
Subjects: Emerging contaminants, Manganese catalysts, Electron paramagnetic resonance, Charge exchange, Water purification
Abstract: [Display omitted] • Mn 3 O 4 /MXene composites with precise control over MXene component were synthesized by a hydrothermal-calcination method. • The introduction of MXene degrades pollutants through a nonradical mechanism by accelerating the electron transfer. • A remarkable and stable catalytic efficiency were achieved by the Mn 3 O 4 /MXene composites. • Excellent cycle stability and anti-interference are displayed in actual water applications. Regulating the performance of manganese oxide catalysts to enhance peroxymonosulfate (PMS) activation for degrading emerging organic pollutants remains a significant challenge. To address this issue, Mn 3 O 4 /MXene composites with precisely controlled MXene contents are synthesized by combining hydrothermal and calcining methods, resulting in a significant regulate the pathway of Mn 3 O 4 activation of PMS and a notable enhancement bisphenol A (BPA) degradation efficiency. The normalized first-order rate constant for optimized Mn 3 O 4 /MXene composites is 0.0218 g/(m2⋅min), which is 8.4 and 2.0 times higher than those of MXene and Mn 3 O 4 , respectively. Moreover, this catalyst exhibits excellent mineralization capacities, achieving up to 88.2 % total organic carbon removal efficiency. Combining with electrochemical and electron paramagnetic resonance analysis, the mechanism of electron transfer processes in this composite is elucidated comprehensively. Moreover, Mn 3 O 4 /MXene displays remarkable efficiency in degrading refractory pollutants, including antibiotics, phenols, and dyes. Furthermore, Mn 3 O 4 /MXene composites exhibit superior stability, reusability, and resistance to interference, highlighting their versatility in diverse environmental contexts. Notably, the catalyst maintains stable catalytic activity for long-term pollutant removal in a continuous-flow system. This study presents a novel approach for developing composite catalysts, providing new avenues for the treatment of emerging pollutants in wastewater. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:[Display omitted] • Mn 3 O 4 /MXene composites with precise control over MXene component were synthesized by a hydrothermal-calcination method. • The introduction of MXene degrades pollutants through a nonradical mechanism by accelerating the electron transfer. • A remarkable and stable catalytic efficiency were achieved by the Mn 3 O 4 /MXene composites. • Excellent cycle stability and anti-interference are displayed in actual water applications. Regulating the performance of manganese oxide catalysts to enhance peroxymonosulfate (PMS) activation for degrading emerging organic pollutants remains a significant challenge. To address this issue, Mn 3 O 4 /MXene composites with precisely controlled MXene contents are synthesized by combining hydrothermal and calcining methods, resulting in a significant regulate the pathway of Mn 3 O 4 activation of PMS and a notable enhancement bisphenol A (BPA) degradation efficiency. The normalized first-order rate constant for optimized Mn 3 O 4 /MXene composites is 0.0218 g/(m2⋅min), which is 8.4 and 2.0 times higher than those of MXene and Mn 3 O 4 , respectively. Moreover, this catalyst exhibits excellent mineralization capacities, achieving up to 88.2 % total organic carbon removal efficiency. Combining with electrochemical and electron paramagnetic resonance analysis, the mechanism of electron transfer processes in this composite is elucidated comprehensively. Moreover, Mn 3 O 4 /MXene displays remarkable efficiency in degrading refractory pollutants, including antibiotics, phenols, and dyes. Furthermore, Mn 3 O 4 /MXene composites exhibit superior stability, reusability, and resistance to interference, highlighting their versatility in diverse environmental contexts. Notably, the catalyst maintains stable catalytic activity for long-term pollutant removal in a continuous-flow system. This study presents a novel approach for developing composite catalysts, providing new avenues for the treatment of emerging pollutants in wastewater. [ABSTRACT FROM AUTHOR]
ISSN:13835866
DOI:10.1016/j.seppur.2024.129904