DOI: 10.1016/j.jcou.2015.12.001
Scopus记录号: 2-s2.0-84957536386
论文题名: Highly efficient, rapid and selective CO2 capture by thermally treated graphene nanosheets
作者: Chowdhury S. ; Balasubramanian R.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2016
卷: 13 起始页码: 50
结束页码: 60
语种: 英语
英文关键词: Adsorption
; CO2
; Graphene
; Isosteric heat
; Selectivity
; Thermal treatment
Scopus关键词: Adsorbents
; Adsorption
; Catalyst selectivity
; Chemical bonds
; Effluent treatment
; Gas adsorption
; Graphene
; Heat treatment
; Molecules
; Nanosheets
; Pore size
; Purification
; Adsorption characteristic
; Design and Development
; Highly ordered structure
; Isosteric heat of adsorption
; Isosteric heats
; Narrow pore size distributions
; Separation and purification
; Textural characteristic
; Carbon dioxide
英文摘要: Graphene, by virtue of its unique molecular structure and many interesting properties, is receiving considerable attention as an adsorbent for separation and purification of gases. In this study, graphene nanosheets were subjected to heat treatment in the temperature range of 200-800 °C under flowing N2 to improve their textural characteristics (surface area, pores size, and total pore volume) for efficient removal of CO2 from flue gases. The resulting graphene materials showed highly ordered structure, large surface area (up to 484 m2 g-1) and interconnected hierarchical pore networks with narrow pore size distribution in the large-micropore/small-mesopore range. As a consequence, the heat-treated graphene samples demonstrated significantly greater CO2 uptake capabilities (up to 2.89 mmol g-1) compared to pristine graphene (0.81 mmol g-1) at 0 °C and 1 bar. More importantly, the materials displayed rapid adsorption kinetics with ultrahigh selectivity for CO2 over N2, as well as stable and readily reversible adsorption/desorption cycling behavior. The isosteric heat of adsorption had an unusual dependence on surface loading because of the presence of attractive intermolecular forces between the adsorbed quadrupolar CO2 molecules. These findings demonstrate for the first time that thermal treatment at high-temperatures can have a positive influence on the single component CO2 adsorption characteristics of graphene sheets and should be explored further as an effective strategy in the design and development of graphene-based porous solid adsorbents for CO2 abatement. © 2015 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52925
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Chowdhury S.,Balasubramanian R.. Highly efficient, rapid and selective CO2 capture by thermally treated graphene nanosheets[J]. Journal of CO2 Utilization,2016-01-01,13