Facile mild hydrothermal treatment for surface functionalization of carbonized sawdust

Wong, Min Jin Karen and J.H. Wong and Zhipeng Wang and Nancy Julius Siambun and Liew, Willey Yun Hsien and Wan Khairul Muzammil Bin Abd Rahim and K. Sopian and Gan, Melvin Jet Hong (2021) Facile mild hydrothermal treatment for surface functionalization of carbonized sawdust. Materials Chemistry and Physics, 263 (1). pp. 1-8. ISSN 0254-0584

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Abstract

This work illustrated the preparation of highly dispersive carbonized sawdust by surface functionalization through a facile mild hydrothermal treatment with an aqueous mixture of reactants, potassium persulfate and potassium hydroxide (KPS:KOH), at 160 °C. The dispersion, morphological and purity analyses play an important role in the determination of the optimal hydrothermal process parameters. Dispersion test unveiled well dispersed modified carbonized sawdust's in polar solvent (ethanol) and no significant morphological changes according to the field emission scanning electron microscopy (FESEM) images. The intensity ratio (ID/IG) from the Raman measurement displayed an increased in the modified carbonized sawdust's ID/IG which indicated successful surface functionalization. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra revealed the introduction of various functional groups onto the carbonized sawdust surface, while the increment in the oxygen and potassium elements percentage (at. %) based on the energy dispersive X-ray system (EDX) supported both FTIR and XPS findings. Carbonized sawdust treated in 1:3 M ratio of KPS:KOH mixture (0.07 M:0.21 M) for 60 min showed the best dispersion in ethanol for at least a month with high degree of functionalization and various oxygen based functional groups were attached on its surface.

Item Type: Article
Keyword: Sawdust , Carbonization , Mild Hydrothermal , Surface Functionalization , Dispersibility
Subjects: Q Science > QD Chemistry
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TP Chemical technology
Department: FACULTY > Faculty of Engineering
Depositing User: SAFRUDIN BIN DARUN -
Date Deposited: 14 Jun 2021 12:37
Last Modified: 14 Jun 2021 12:37
URI: https://eprints.ums.edu.my/id/eprint/27007

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