Journal article
Liquid-phase exfoliation of layered biochars into multifunctional heteroatom (Fe, N, S) co-doped graphene-like carbon nanosheets
Chemical engineering journal (Lausanne, Switzerland : 1996), v 420, p127601
15 Sep 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We here report a liquid-phase exfoliation strategy to delaminate multilayered biochars into multi-heteroatom (Fe, N, S) co-doped graphene-like carbon nanosheets, in which the multilayered biochars derived from naturally evolved layer-by-layer precursors. This strategy provides the versatile capability to tailor the textural properties of the as-synthesized carbon nanosheets, such as obtaining a controllable specific surface area of up to 2491 m(2) g(-1). Thanks to the unique integration of graphene-like microstructures with a thickness of 4.3 nm, large specific surface area and hierarchical pores, homogenous co-doping of N, S, and Fe, and high electronic conductivity, the as-synthesized Fe-N-S co-doped carbon nanosheets could act as multifunctional electrodes for electrocatalytic process of oxygen reduction reaction (ORR) and capacitive energy storage. The optimized nanosheets showed a better ORR catalytic performance than commercial Pt/C catalyst, with a more positive onset potential (1.026 V) and half-wave potential (0.829 V), higher long-term stability, and outstanding methanol tolerance in alkaline mediums. Furthermore, the porous carbon nanosheets exhibited excellent supercapacitive performances which delivered a high energy density of 29.1 Wh kg(-1) at a high power density of up to 39.5 kW kg(-1) in an ionic liquid electrolyte. This liquid-phase exfoliation strategy will offer new inspiration for the synthesis of various biomass-derived graphene-like carbon nanosheets for multifunctional applications.
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Details
- Title
- Liquid-phase exfoliation of layered biochars into multifunctional heteroatom (Fe, N, S) co-doped graphene-like carbon nanosheets
- Creators
- Weiqian Tian - Royal Institute of TechnologyQiuming Gao - Beihang UniversityArmin VahidMohammadi - Drexel UniversityJie Dang - Chongqing UniversityZeyu Li - Beihang UniversityXiao Liang - Beihang UniversityMahiar M. Hamedi - Royal Institute of TechnologyLiming Zhang - KTH Royal Institute of Technology
- Publication Details
- Chemical engineering journal (Lausanne, Switzerland : 1996), v 420, p127601
- Publisher
- Elsevier
- Number of pages
- 11
- Grant note
- 21571010 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) 2014CB931800 / National Basic Research Program of China (973 Program); National Basic Research Program of China B14009 / 111 Project; Ministry of Education, China - 111 Project
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000664791100003
- Scopus ID
- 2-s2.0-85096621424
- Other Identifier
- 991019182649704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Chemical
- Engineering, Environmental