Waste biomass valorization through production of xylose-based porous carbon microspheres for supercapacitor applications

Bibliographische Detailangaben
Veröffentlicht in:	Waste management (New York, N.Y.). - 1999. - 105(2020) vom: 15. März, Seite 492-500
1. Verfasser:	Waribam, Preeti (VerfasserIn)
Weitere Verfasser:	Ngo, Sang Dinh, Tran, Thi Tuong Vi, Kongparakul, Suwadee, Reubroycharoen, Prasert, Chanlek, Narong, Wei, Lu, Zhang, Haibo, Guan, Guoqing, Samart, Chanatip
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2020
Zugriff auf das übergeordnete Werk:	Waste management (New York, N.Y.)
Schlagworte:	Journal Article Carbon microsphere Chemical activation Hydrothermal Porous carbon Supercapacitor Xylose A1TA934AKO

Beschreibung
Zusammenfassung:	Copyright © 2020 Elsevier Ltd. All rights reserved. Sequential potassium hydroxide (KOH)-phosphoric acid (H3PO4) activation was applied to biomass waste to fabricate activated carbon microspheres (mCMs) with a controllable porous structure. Carbon microspheres (CMs) were first synthesized from xylose using a bottom-up approach of hydrothermal carbonization. Sequential KOH and H3PO4 activation was applied to the CMs in a KOH-carbon solid reaction. This created pores, which were further enlarged by adsorption of H3PO4. The KOH:carbon (C) and H3PO4:C molar ratios, and the H3PO4 heating rate and activation time, were varied to investigate the effect on average pore size and pore distribution. A uniform porous structure was formed without destruction of the spherical shape, and an almost 700-fold increase in surface area was obtained over the non-activated CMs. Following activation with H3PO4, phosphorous groups were found to be present at the surface of the carbon microspheres. The mCM was tested as a supercapacitor electrode and was shown to have a maximum specific capacitance of up to 277F g-1. A Ragone plot showed the maximum power density to be 173.88 W Kg-1. This increased specific capacitance was attributed to the increase in surface area and the presence of phosphorous-containing acid sites on the material surface
Beschreibung:	Date Completed 24.03.2020 Date Revised 24.03.2020 published: Print-Electronic Citation Status MEDLINE
ISSN:	1879-2456
DOI:	10.1016/j.wasman.2020.02.042