MOF derived novel zero-valent iron @ graphitic carbon-based nanoreactors for selective reduction of hazardous 4-nitrophenol

Asif, Iqra; Baig, Nadeem; Sher, Muhammad; Ul‐Hamid, Anwar; Altaf, Muhammad; Mumtaz, Asad; Sohail, Manzar

doi:10.1016/j.clet.2021.100081

Cited by 6 publications

(2 citation statements)

References 59 publications

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“…Depositing nanoFe 0 onto a high surface area carrier can alleviate the agglomeration. Carriers including clay, zeolite, metal-organic frameworks, graphene, and biochar (BC) have been used for nanoFe 0 dispersion (Asif et al 2021;Bagheri et al 2021;Ezzatahmadi et al 2017;Florea et al 2022;Li et al 2018;Liu et al 2019;Wang et al 2019;Xing et al 2020). BC is a low cost and effective candidate for dispersing nanoFe 0 because of its highly porous high surface area structure and many surface functional groups (Wang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Pyrolytic synthesis of graphene-encapsulated zero-valent iron nanoparticles supported on biochar for heavy metal removal

Karunaratne

Nayanathara

Navarathna

et al. 2022

Biochar

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Biochar (BC)-supported graphene-encapsulated zero-valent iron nanoparticle composites (BC-G@Fe0) are promising engineering nanocomposites that can be used to scavenge heavy metal from wastewater. However, the production of BC-G@Fe0 through carbothermal reduction using biomass as a carbon source remains challenging because of biomass pyrolysis complications. Here, we examined two carbothermal reduction routes for preparing BC-G@Fe0 using bamboo as the carbon source. The first route impregnated Fe ions (Fe2+/3+) into unpyrolyzed bamboo particles initially, followed by carbonization at 600–1000 °C. This process produced BC-G@Fe0 dominated by iron carbide (Fe3C), which led to low heavy metal removal efficiency (i.e., Cu2+ capacity of < 0.3 mmol g−1). In the second route, bamboo particles were pyrolyzed (600 °C) to biochar first, followed by impregnating this biochar with Fe ions, and then carbonized at 600–1000 °C. This route produces zero-valent iron nanoparticles, which resulted in high heavy metal removal capacities (i.e., 0.30, 1.58, and 1.91 mmol g−1 for Pb2+, Cu2+, and Ag+, respectively). The effects of carbonization temperature (600–1000 °C), iron source (i.e., iron nitrates, iron sulfate, ferrous chloride, and ferric chloride), and iron loading (5–40%) on the morphology, structure, and heavy metal ion aqueous uptake performance of BC-G@Fe0 were also investigated. This study revealed the formation mechanisms of BC-G@Fe0 through biomass carbothermal reduction, which could guide the application-oriented design of multifunctional iron-BC composites for water remediation. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Pyrolytic synthesis of graphene-encapsulated zero-valent iron nanoparticles supported on biochar for heavy metal removal

Karunaratne

Nayanathara

Navarathna

et al. 2022

Biochar

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“…Single source metal precursors are the practical and clean route for synthesizing nanocomposites, and these precursors are receiving significant attention in the synthesis of pure nanomaterials [31,32] . Herein, we have employed a facile approach to synthesize pure cobalt nitride by using single‐source metal precursors.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Carbon‐Supported Cobalt Nitride Nano‐Catalyst

et al. 2022

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Transition metal nitrides have attracted great interest among the non‐noble catalysts employed in heterogeneous catalytic processes because of their exceptional stability and catalytic potential. However, the approach for their synthesis has remained a tremendous challenge. This study presents the synthesis of Co4N/C catalyst fabricated at 400, 600, and 800 °, symbolized as Co4N/C‐400, Co4N/C‐600, Co4N/C‐800, respectively. The characterization of fabricated catalysts is carried out through various advanced analytical techniques. As prepared nano‐catalyst Co4N/C shows remarkable catalytic efficiency in terms of low activation energy (Ea=3.038×10−1 KJ mol−1), fast conversion rate (Kapp=0.2884 s−1), and 97.57% conversion efficiency. Moreover, it also exhibits excellent stability and reusability because of its metallic characteristics. The outstanding catalytic activity of the catalyst is the combined effect in which the Co4N nanoparticles acted as active sites, and the carbon support doped with nitrogen provided an expressway for the transport of electrons required for catalytic reduction. Moreover, the designed catalyst is immobilized on the cellulose membrane filter support, to demonstrate the catalytic reduction of 4‐nitrophenol to 4‐aminophenol. We envision that our work would facilitate the fabrication of cobalt nitrides‐based nano‐catalysts for a wide range of industrial applications.

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Carbon-based zero valent iron catalyst for NOX removal at low temperatures: performance and kinetic study

Cao

Zhang

Guo

2022

Environ Sci Pollut Res

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MOF derived novel zero-valent iron @ graphitic carbon-based nanoreactors for selective reduction of hazardous 4-nitrophenol

Cited by 6 publications

References 59 publications

Pyrolytic synthesis of graphene-encapsulated zero-valent iron nanoparticles supported on biochar for heavy metal removal

Pyrolytic synthesis of graphene-encapsulated zero-valent iron nanoparticles supported on biochar for heavy metal removal

Synthesis and Characterization of a Carbon‐Supported Cobalt Nitride Nano‐Catalyst

Carbon-based zero valent iron catalyst for NOX removal at low temperatures: performance and kinetic study

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