Biocarbon graphenization processes and energy assessment. A review

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 153795 - 153795

Published: July 6, 2024

Reducing energy consumption and environmental impact in the graphenic material production is of foremost importance. While using lignocellulosic biomass gaining momentum, processing such a non-graphitizable resource consuming as it requires thermal treatment above 2000 °C. Three alternative carbonization routes are analyzed: catalytic, hydrothermal pre-treatment solar. We discuss sustainability biocarbon compared to conventional high temperature carbonization. The mechanisms graphenization unveiled variety characterization methods from macroscopic nanoscopic scale. In catalytic graphenization, showed that metal carbides play crucial role intermediate phases mechanism. Solar-driven pyrolysis focused intense radiative flux resulting an improve growth flattening graphene layers biocarbon. For each process considered, operating conditions can finely be tuned control degree, successfully convert into This review provides new insights on relation assessment. calcium-doped we estimate saving 22 % when working at 1600 °C raw attributed formation calcium carbide around 1300 Hydrothermal carbon pre-structuration which could save up 85 input by lowering 1200 °C, while solar consumes half one. drastically reduces production.

Language: Английский

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Nitrogen-Containing Carbon Tubes Fabricated by Light Irradiation

Langmuir, Journal Year: 2024, Volume and Issue: 40(12), P. 6272 - 6284

Published: March 14, 2024

Cotton-core/polypyrrole (PPy)-sheath fibers (cotton/PPy fibers) were synthesized by aqueous chemical oxidative seeded polymerization and utilized as precursors for nitrogen-containing carbon (NCC) tubes. Irradiation of the cotton/PPy with a near-infrared (NIR) laser heated them to approximately 300 °C due light-to-heat photothermal conversion PPy, cotton core was thermally decomposed vaporized. Scanning electron microscopy studies revealed formation tubes monodispersed diameters, elemental microanalysis, Fourier transform infrared spectroscopy, Raman spectroscopy confirmed that PPy sheath converted into NCC. Furthermore, sunlight also worked light source in fabricating NCC The thicknesses controlled between 410 nm 2.30 μm tuning thickness. method developed this study can be extended other polymeric fibers, including acrylic wool fibers. shapes cross sections surface nanomorphologies reflected those polymer/PPy

Language: Английский

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Effective Activation of Peroxymonosulfate by Oxygen Vacancy Induced Musa Basjoo Biochar to Degrade Sulfamethoxazole: Efficiency and Mechanism

Toxics, Journal Year: 2024, Volume and Issue: 12(4), P. 283 - 283

Published: April 12, 2024

Biochar materials have garnered attention as potential catalysts for peroxymonosulfate (PMS) activation due to their cost-effectiveness, notable specific surface area, and advantageous structural properties. In this study, a suite of plantain-derived biochar (MBB-400, MBB-600, MBB-800), possessing well-defined pore structure substantial number uniformly distributed active sites (oxygen vacancy, OVs), was synthesized through facile calcination process at varying temperatures (400, 600, 800 °C). These were designed the PMS in degradation sulfamethoxazole (SMX). Experimental investigations revealed that OVs not only functioned enriched pollutants, enhancing opportunities free radicals (•OH/SO4•−) surface-bound (SBRs) attack but also served channels intramolecular charge transfer leaps. This role contributed reduction interfacial resistance, expediting electron rates with PMS, thereby accelerating decomposition pollutants. Capitalizing on these merits, MBB-800/PMS system displayed 61-fold enhancement conversion rate SMX compared inactivated MBB/PMS system. Furthermore, MBB-800 exhibited less cytotoxicity towards rat pheochromocytoma (PC12) cells. Hence, straightforward synthesis emerges promising catalyst vast sustainable efficient wastewater treatment environmental remediation.

Language: Английский

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Muscle supercompensation inspired high-strength partially dissolved-regenerated cellulose biochar as the matrix of phase change materials for thermal storage

Sustainable materials and technologies, Journal Year: 2023, Volume and Issue: 38, P. e00710 - e00710

Published: Sept. 7, 2023

Language: Английский

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Facile synthesis of Cu-Ni bimetallic nanoparticles using peppermint leaf extract for enhanced antimicrobial efficacy and solar-driven photocatalytic activity

Emergent Materials, Journal Year: 2023, Volume and Issue: 7(1), P. 221 - 233

Published: Nov. 17, 2023

Language: Английский

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