Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism

Fu, Haichao; Ma, Shuanglong; Zhao, Peng; Xu, Shengjun; Zhan, Sihui

doi:10.1016/j.cej.2018.11.207

Cited by 356 publications

(49 citation statements)

References 53 publications

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“…Removal mechanisms of nZVI@biochar include reduction, surface complexation, and coprecipitation. Other magnetic mediums, such as spinel-type ferromagnets (MgFe 2 O 4 , MnFe 2 O 4 , and CoFe 2 O 4 ) (Chen et al 2019a, b, c, d;Fu et al 2019;Jung et al 2017;Wang et al 2015b) and alloys (CoPt 3 and FePt) (Wang et al 2014; Zhu et al 2009), when coated on biochar surface via different methods, can also endow biochar magnetism.…”

Section: Magnetic Biocharsmentioning

confidence: 99%

“…A wide range of pollutants can be removed through sorption by magnetic biochar, such as inorganic anions (Chen et al 2011;Jung et al 2017), heavy metals (Cai et al 2019;Wang et al 2015c;Wu et al 2018;Yap et al 2017), and organic pollutants (Frohlich et al 2019;. What is more, the introduction of magnetic components (nZVI, nano-Fe 3 O 4 and -FeO) endows or enhances magnetic biochar with catalytic reduction activity for heavy metals (Liu et al 2019b;Zhong et al 2018) and degradation activity for organic contaminants (Chen et al 2017a;Cheng et al 2019;Fu et al 2019). It should be noted that during the synthesis process of magnetic biochar, toxic and harmful substances may be introduced or produced.…”

Section: Magnetic Biocharsmentioning

confidence: 99%

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Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Wang

et al. 2020

Biochar

124

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The development of biochar has triggered a hot-spot in various research fields including agriculture, energy, environment, and materials. Biochar-based materials provide a novel approach against environmental challenging issues. Considering the rapid development of biochar materials, this review serves as a valuable platform to summarize the recent progress on the theoretical investigation and engineering applications of biochar materials in environmental remediation. For a better understanding of the structure-application relationships, the structural properties of biochar from macroscopic and microscopic aspects are summarized. The multilevel structures including elements, phases, surface chemistry, and molecular are highlighted to elucidate the multi-functional properties of biochars. Sorption, catalysis, redox reaction, and biological activity of biochar are briefly illustrated, which influence the transport, transformation, and removal of organic and inorganic pollutants in the environments. According to the multi-level structures and structure-application relationships of biochar, specific biocharbased materials and devices have been designed for practical environmental application. The important progress on the functionalization and device of biochar-based materials, including magnetic biochars, 2D and 3D biochar-based macrostructures, immobilized microorganism on biochar, and biochar-amended biofilters are highlighted. The environmental friendliness and sustainability of biochar-based materials, considering the whole cycle from synthesis to application, are evaluated.

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Section: Magnetic Biocharsmentioning

confidence: 99%

Section: Magnetic Biocharsmentioning

confidence: 99%

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Wang

et al. 2020

Biochar

124

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“…[54] The Mn 2p spectrum ( Figure 3D)i sd econvoluted into two peaks at 641.3 eV and 653.3 eV,w hich correspond to Mn 2p 3/2 and Mn 2p 1/2 of Mn 2 + . [55] The OER activities of as-prepared catalysts are evaluated via at raditional three-electrode system in the 1 m KOH solution. The linear sweep voltammetry curves ( Figure S1A It requires a1 60 mV overpotential to achieve ac urrent density of 10 mA cm À2 in aH ER reaction (FigureS1B).…”

Section: Resultsmentioning

confidence: 99%

Hollow Porous MnFe₂O₄ Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Liu

Huo

Yan

et al. 2020

Chemistry A European J

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The development of inexpensive and efficient bifunctional electrocatalysts is significant for widespreadp ractical applications of overall water splittingt echnology. Herein,aone-pot solvothermal method is used to prepare hollow porousM nFe 2 O 4 spheres, which are grown on natural-abundant elm-money-derived biocharm aterial to construct MnFe 2 O 4 /BC composite. When the overpotential is 156 mV for both the oxygen evolution reaction and the hydrogen evolution reaction, the current density reaches up to 10 mA cm À2 ,a nd its duration is 10 h. At 1.51 V, the overall waterd ecomposition currentd ensity of 10 mA cm À2 can be obtained in 1 m KOH. This work proves that elm-money-derived biochar is av alid substrate for growingh ollow porous spheres.M nFe 2 O 4 /BC give ap romising general strategy for preparing the effective and stable bifunctional catalysis that can be expand to multiple transition metal oxide.

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“…The satellite peak of the Fe 2p appears at 718.6 eV [28,29]. There are three obvious fitted peaks at 528.6, 530.0 and 532.2 eV in Figure 2e, which correspond to the metallic oxides and sorbed H 2 O [30,31]. Similarly, the C 1s spectra for the MnFe 2 O 4 @C composites can be fitted to three peaks, corresponding to C-C, C-O and C=O [30,31].…”

Section: Resultsmentioning

confidence: 99%

Design and Regulation of Novel MnFe2O4@C Nanowires as High Performance Electrode for Supercapacitor

et al. 2019

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Bimetallic oxides have been considered as potential candidates for supercapacitors due to their relatively high electric conductivity, abundant redox reactions and cheapness. However, nanoparticle aggregation and huge volume variation during charging-discharging procedures make it hard for them to be applied widely. In this work, one-dimensional (1D) MnFe2O4@C nanowires were in-situ synthesized via a simply modified micro-emulsion technique, followed by thermal treatment. The novel 1D and core-shell architecture, and in-situ carbon coating promote its electric conductivity and porous feature. Due to these advantages, the MnFe2O4@C electrode exhibits a high specific capacitance of 824 F·g−1 at 0.1 A·g−1 and remains 476 F·g−1 at 5 A·g−1. After 10,000 cycles, the capacitance retention of the MnFe2O4@C electrode is up to 93.9%, suggesting its excellent long-term cycling stability. After assembling with activated carbon (AC) to form a MnFe2O4@C//AC device, the energy density of this MnFe2O4@C//AC device is 27 W·h·kg−1 at a power density of 290 W·kg−1, and remains at a 10 W·h·kg−1 energy density at a high power density of 9300 W·kg−1.

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Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism

Cited by 356 publications

References 53 publications

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Hollow Porous MnFe₂O₄ Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Design and Regulation of Novel MnFe2O4@C Nanowires as High Performance Electrode for Supercapacitor

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Activation of peroxymonosulfate by graphitized hierarchical porous biochar and MnFe2O4 magnetic nanoarchitecture for organic pollutants degradation: Structure dependence and mechanism

Cited by 356 publications

References 53 publications

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Hollow Porous MnFe2O4 Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis

Design and Regulation of Novel MnFe2O4@C Nanowires as High Performance Electrode for Supercapacitor

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Hollow Porous MnFe₂O₄ Sphere Grown on Elm‐Money‐Derived Biochar towards Energy‐Saving Full Water Electrolysis