What does this research mean for the field?

Nitrogen-doped biochar-supported copper ferrite (CuFe2O4/N0.5-BC) significantly enhances the activation of persulfate for methylene blue degradation compared to undoped composites, maintaining high catalytic stability and efficiency over multiple cycles. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the catalytic efficiency and mechanisms of nitrogen-doped biochar-supported copper ferrite composites in activating persulfate for the degradation of methylene blue.

September 10, 2026ChemistryOpen Access

N-Doping of Biochar and Support Strategies to Enhance the Catalytic Activity of CuFe2O4 for Persulfate-Promoted Methylene Blue Degradation

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Authors

XWXinhui WeiGuangxi University QHQuanlong HuangGuangxi University LWLong WenGuangxi University

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Implication

Experimental study demonstrates enhanced persulfate degradation of methylene blue using nitrogen-doped biochar-supported copper ferrite, indicating an effective reusable catalyst for wastewater.

Key Points

To evaluate the catalytic efficiency and mechanisms of nitrogen-doped biochar-supported copper ferrite composites in activating persulfate for the degradation of methylene blue.
Synthesized copper ferrite/nitrogen-doped biochar composites (CuFe2O4/Nx-BC) using a one-step sol–gel pyrolysis technique.
Investigated the effects of preparation conditions, reaction parameters, and common co-existing anions on methylene blue degradation efficiency.
Assessed catalyst durability and stability across five consecutive reuse cycles and analyzed reactive radical species.
Under optimal conditions, the CuFe2O4/N0.5-BC + persulfate system achieved 94.1% degradation of methylene blue compared to 26.2% for persulfate alone, increasing the reaction rate constant 9.12-fold from 0.00324 min⁻¹ to 0.02954 min⁻¹.
The nitrogen-doped composite outperformed undoped CuFe2O4/BC (94.1% vs. 34% degradation; 1.1-fold higher rate constant) and maintained 87.5% degradation after five cycles.
Radical scavenger analyses demonstrated that SO4•− served as the primary reactive species, with additional contributions from •OH and O2•−.

Cite This Study

Wei et al. (2026) studied this question.

synapsesocial.com/papers/6aa27bfe58559d80afc757e9 https://doi.org/10.3390/chemistry8090125

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Implication

Experimental study demonstrates enhanced persulfate degradation of methylene blue using nitrogen-doped biochar-supported copper ferrite, indicating an effective reusable catalyst for wastewater.

N-Doping of Biochar and Support Strategies to Enhance the Catalytic Activity of CuFe2O4 for Persulfate-Promoted Methylene Blue Degradation

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Cite This Study

N-Doping of Biochar and Support Strategies to Enhance the Catalytic Activity of CuFe2O4 for Persulfate-Promoted Methylene Blue Degradation

Discussion

Member takes

Implication

Key Points

Cite This Study

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