Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/12954
Tipo: Artigo
Título: Tuning the surface properties of biochar by thermal treatment
Autor(es): Tristão, Juliana Cristina
Soares, Ricardo Reis
Cunha, Igor Tadeu da
Mendonça, Fernanda Gomes de
Lago, Rochel Montero
Abstract: In this work, the effect of controlled thermal treatment to tune biochar surface properties such as area/porosity, functionalities and reactivity was investigated. TG-MS, CHN, Raman, IR, BET, Zeta and SEM analyses suggested that thermal treatment led to the decomposition of an organic complex/amorphous phase to produce micropores based on graphene nanostructures and a strong increase on surface area from 3 m2 g−1 for biochar to 30, 408 and 590 m2 g−1, at 400, 600 and 800 °C, respectively. The treatment also led to a gradual decrease on oxygen content from 27 to 14 wt% at 800 °C due to decomposition of surface functionalities changing surface properties such as zeta potential, adsorption of anionic and cationic species and an increase on the activity for sulfide oxidation which is discussed in terms of increase in surface area and the presence of surface redox quinone groups.
Palavras-chave: Biochar
Thermal treatment
Graphene
Dye adsorption
Sulfide oxidation
Editor: Bioresource Technology
Tipo de Acesso: Open Access
URI: https://doi.org/10.1016/j.biortech.2017.07.099
http://www.locus.ufv.br/handle/123456789/12954
Data do documento: 24-Jul-2017
Aparece nas coleções:Artigos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
1-s2.0-S0960852417312154-main.pdftexto completo723,86 kBAdobe PDFThumbnail
Visualizar/Abrir


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.