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dc.contributor.authorUnur, Ece
dc.descriptionUNUR YILMAZ, Ece/0000-0001-5807-633Xen_US
dc.description.abstractHydrothermal carbonization (HTC) was utilized as a pretreatment method to convert high oxygen content lignocellulosic biomass, otherwise invaluable renewable material, to a more condensed functional material for higher value applications. Hazelnut shells (HS), an abundant agricultural biomass, were pre-carbonized to hydrophilic and thermochemically more stable hydrochar (HH) under hydrothermal conditions. Successive calcination of HH under inert atmosphere yielded a hydrophobic nanoarchitectured carbon material with a 250 m(2) g(-1) specific surface area (HH-T) while the same procedure in the presence of a porogen yielded a highly porous hydrophilic carbon material with a specific surface area of 1700 m(2) g(-1) (HH-KT). The batch-equilibrium and batch-kinetic methylene blue dye (MB) adsorption experiments, in aqueous solutions revealed that the HH-KT exhibits adsorption rates and capacities higher than biomass-derived activated carbons obtained by traditional routes. Monolayer adsorption capacity and pseudo-second order kinetic rate constant, as high as 524 mg g(-1) and 0.052 g mg(-1) min(-1) were recorded for HH-KT, respectively. HH-KT, with its honeycomb-like structure dominated by micropores and mesopores, high pore volume, and appropriate surface functionality to anchor basic dyes, proves ideal for adsorption of polar organic pollutants from aqueous solutions. Materials produced by the presented sustainable approach, which eliminates the fossil fuel based precursors by mimicking the nature's way of coal making, can also be utilized in drug delivery, catalysis and energy storage applications. (C) 2012 Elsevier Inc. All rights reserved.en_US
dc.description.sponsorshipTekno-Last Ltd., Inc.en_US
dc.description.sponsorshipAuthor is grateful to Bursa Cement Factory Co., Inc. and Prof.Dr. Cevdet Demir for allowing the use of their facilities for the preparation of the samples and conduction of adsorption experiments, respectively. Author extends her sincere gratitude to Middle East Technical University Central Laboratory for their support in characterization experiments and Tekno-Last Ltd., Inc. for supporting this project.en_US
dc.publisherElsevier Science Bven_US
dc.subjectHydrothermal carbonizationen_US
dc.subjectNanoporous carbonen_US
dc.subjectSurface functionalityen_US
dc.titleFunctional nanoporous carbons from hydrothermally treated biomass for environmental purificationen_US
dc.contributor.institutionauthorUnur, Ece
dc.relation.journalMicroporous And Mesoporous Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US

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