BROWSE

Related Scientist

CNCR's photo.

CNCR
나노물질 및 화학반응 연구단
more info

ITEM VIEW & DOWNLOAD

Template dissolution with NaOH–HCl in synthesis of zeolite-templated carbons: Effects on oxygen functionalization and electrical energy storage characteristics

Cited 5 time in webofscience Cited 5 time in scopus
687 Viewed 232 Downloaded
Title
Template dissolution with NaOH–HCl in synthesis of zeolite-templated carbons: Effects on oxygen functionalization and electrical energy storage characteristics
Author(s)
Hongjun Park; Steven K. Terhorst; Raj Kumar Bera; Ryong Ryoo
Publication Date
2019-12
Journal
CARBON, v.155, pp.570 - 579
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
© 2019 Elsevier LtdZeolite-templated synthesis is a versatile route to ordered microporous carbons built with single-walled sp2 framework of various structures, but the use of hazardous HF to dissolve the zeolite template is still a critical safety issue. We investigated the template-removal process using NaOH and HCl, which are safer than HF. The results indicated that the residual ash content in the carbon could be lowered to less than 5 wt% when the template was removed by consecutive treatments using NaOH and HCl in a proper sequence depending on the zeolite framework type. The carbon obtained in this manner exhibited a rather increased supercapacitance in aqueous media at high current density, as compared to carbons from HF-washing. In the case of the non-aqueous supercapacitor, however, the washing with NaOH–HCl resulted in low capacitance. This was due to the effect of NaOH to generate oxygen-functional groups, which could lead to an increase in the hydrophilicity, and a decrease in the electrical conductivity. Furthermore, the oxygen-functional groups could serve as a base to graft organic amines. When the carbon was heated in H2, the oxygen content decreased to a similar level to that of the HF-washed carbon, restoring the conductivity and electrochemical energy storage characteristics
URI
https://pr.ibs.re.kr/handle/8788114/6701
DOI
10.1016/j.carbon.2019.09.020
ISSN
0008-6223
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
Carbon 155 (2019) 570-579.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse