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Related Concept Videos

Catalysis02:50

Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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Interface coupling effect in biomass-derived iron sulfide nanomaterials triggering efficient hydrogen peroxide

Heng Li1, Xiaoying Jin1, Qin Li2

  • 1Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350117, Fujian Province, China.

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|July 17, 2023
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Summary

Biofunctional iron sulfide nanoparticles (P-FeS NPs) derived from pine biomass enhance hydrogen peroxide (H2O2) activation and norfloxacin degradation. These green catalysts offer superior performance and stability for wastewater treatment.

Keywords:
Catalytic oxidationFeS NPsInterface coupling effectMulti-reactive speciesNOR

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Area of Science:

  • Environmental Science
  • Materials Science
  • Catalysis

Background:

  • Slow electron migration in co-precipitated iron sulfide nanoparticles (C-FeS NPs) limits hydrogen peroxide (H2O2) activation.
  • Developing efficient catalysts for pollutant degradation is crucial for environmental remediation.

Purpose of the Study:

  • To synthesize and characterize biofunctional iron sulfide nanoparticles (P-FeS NPs) from Pinus massoniana Lamb biomass.
  • To investigate the enhanced H2O2 activation and norfloxacin (NOR) degradation capabilities of P-FeS NPs.
  • To elucidate the mechanism behind the improved catalytic activity.

Main Methods:

  • Co-precipitation synthesis of C-FeS NPs and derivation of P-FeS NPs from biomass.
  • Characterization of nanoparticle properties and interfacial coupling.
  • Evaluation of H2O2 activation and NOR degradation efficiency.
  • Radical quenching tests to identify reactive oxygen species.

Main Results:

  • P-FeS NPs demonstrated 100% catalytic activity for H2O2 activation, significantly outperforming C-FeS NPs (53.1%).
  • Fe-OH interfacial sites formed between FeS NPs and biomass hydroxyl groups accelerated electron transfer and reactive species generation.
  • Singlet oxygen (1O2) was the primary reactive species, followed by hydroxyl radicals (•OH) and superoxide radicals (•O2-).
  • P-FeS NPs achieved 96.4% NOR removal from wastewater with high tolerance to various pH conditions.

Conclusions:

  • Biofunctional P-FeS NPs exhibit superior catalytic performance for H2O2 activation and NOR degradation compared to conventional C-FeS NPs.
  • The interface coupling effect between FeS NPs and biomass is key to enhancing electron transfer and catalytic efficiency.
  • This study highlights the potential of green, sustainable interfacial catalysts for effective wastewater treatment.