Synergetic activation of peroxymonosulfate by MnO2-loaded β-FeOOH catalyst for enhanced degradation of organic pollutant in water

Lyu, Cong; He, Dannong; Mou, Zishen; Yang, Xiao

doi:10.1016/j.scitotenv.2019.133589

Cited by 60 publications

(10 citation statements)

References 50 publications

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“…Under the influence of DMPO-•O 2 – /•OOH, DMPO-•OH has changed intensity, but the position of the peaks have not been affected. DMPO has a unique reaction with 1 O 2 , showing three identical peaks . Furthermore, •CH 3 from dimethyl sulfoxide (DMSO) or acetate buffer was also observed, which can be captured by DMPO to form DMPO-•CH 3 (A N = 16.0 G, A H = 22.9 G), thus showing the characteristic EPR signals of a carbon-centered radical.…”

Section: Resultsmentioning

confidence: 97%

Ultrasensitive Stimulation Effect of Fluoride Ions on a Novel Nanozyme–SERS System

Wen

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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Recently, nanomaterial-based enzyme mimics (nanozymes) have captured extensive interest owing to their high stability and low cost compared with natural enzymes. The mechanism of the stimulation effect of external substances on the nanozymes and their sensing applications are significantly attractive. In this study, we have constructed an excellent nanozyme−SERS system based on reduced MnCo 2 O 4 /Au nanotubes (R-MnCo 2 O 4 /Au NTs) through a selfreduction process with the assistance of oxygen vacancies. In the R-MnCo 2 O 4 /Au NTs, R-MnCo 2 O 4 possesses rich oxidation states of Mn 2+ / Mn 3+ and Co 2+ /Co 3+ , giving them excellent peroxidase-like catalytic activity; on the other hand, Au NPs on the surface of R-MnCo 2 O 4 NTs contribute to their favorable SERS activity. Meanwhile, the important contribution of •OH and O 2•− radicals in the catalytic mechanism of nanozymes was proposed. Furthermore, the peroxidase-like activity of the R-MnCo 2 O 4 /Au NTs is reduced with the introduction of fluoride, which is related to the inhibition of the formation of •OH radicals. Owing to the inhibition effect, an ultrasensitive sensing platform for fluoride detection was developed. The work in this study provides a deep insight into the mechanism of the catalytic activity of nanozymes and opens up broad promising prospects in biosensing.

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Section: Resultsmentioning

confidence: 97%

Ultrasensitive Stimulation Effect of Fluoride Ions on a Novel Nanozyme–SERS System

Wen

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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“…The DMPO-OH, DMPO-O 2 À and, particularly, TEMP-1 O 2 showed high signal intensity. According to previous studies, O 2 c À can be converted to 1 O 2 (eqn ( 15)-( 17)), 2,15,23 which could improve the rate of AO7 degradation. The results of the quenching experiments and EPR showed that 1 O 2 was the main reactive species for AO7 degradation in the CNMO/PMS system, followed by cOH.…”

Section: Cnmp Mechanism Discussionmentioning

confidence: 98%

Thermal activation significantly improves the organic pollutant removal rate of low-grade manganese ore in a peroxymonosulfate system

Chen

Yin²,

Dong

et al. 2022

RSC Adv.

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“…[ 265 ] prepared MnO 2 /Mg‐Al LDH and used it as a photocatalyst to degrade benzyl alcohol. Moreover, MnO 2 /FeOOH composite materials have also been reported by researchers for organic pollutant degradation, [ 266 ] thallium adsorption removal, [ 267 ] and arsenic adsorption removal. [ 268 ]…”

Section: Fabrication Of Mno2‐based Compositesmentioning

confidence: 99%

MnO₂‐Based Materials for Environmental Applications

et al. 2021

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Manganese dioxide (MnO2) is a promising photo–thermo–electric‐responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2‐based composites via the construction of homojunctions and MnO2/semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2‐based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high‐efficiency MnO2‐based materials for comprehensive environmental applications is provided.

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Synergetic activation of peroxymonosulfate by MnO2-loaded β-FeOOH catalyst for enhanced degradation of organic pollutant in water

Cited by 60 publications

References 50 publications

Ultrasensitive Stimulation Effect of Fluoride Ions on a Novel Nanozyme–SERS System

Ultrasensitive Stimulation Effect of Fluoride Ions on a Novel Nanozyme–SERS System

Thermal activation significantly improves the organic pollutant removal rate of low-grade manganese ore in a peroxymonosulfate system

MnO₂‐Based Materials for Environmental Applications

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Synergetic activation of peroxymonosulfate by MnO2-loaded β-FeOOH catalyst for enhanced degradation of organic pollutant in water

Cited by 60 publications

References 50 publications

Ultrasensitive Stimulation Effect of Fluoride Ions on a Novel Nanozyme–SERS System

Ultrasensitive Stimulation Effect of Fluoride Ions on a Novel Nanozyme–SERS System

Thermal activation significantly improves the organic pollutant removal rate of low-grade manganese ore in a peroxymonosulfate system

MnO2‐Based Materials for Environmental Applications

Contact Info

Product

Resources

About

MnO₂‐Based Materials for Environmental Applications