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Large-scale fabrication of N-doped porous carbon nanosheet for dye adsorption and supercapacitor application

Abstract

Development of novel large-scale synthetic protocols for heteroatom-doped porous carbon nanosheets is highly imperative for wastewater purification and high-performance electrode materials. In the present work, we propose a simple and feasible explosion-assisted activation strategy to fabricate a kind of N-doped porous carbon nanosheet (N-PCNS) at a large scale, in which only lactose and zinc nitrate were used as raw materials. The obtained N-PCNS possesses hierarchical micro- and mesopore nanostructures with a high specific surface area of 879 m2 g-1 while keeping a high nitrogen content of 3.73 at.%. The adsorption properties of the N-PCNS were systematically evaluated through adsorption of neutral red (NR) dye. The adsorption capacity of the N-PCNS was as high as 439.6 mg g-1, meanwhile the adsorption process exhibited fine correlation with Langmuir isotherm and pseudo-second-order kinetic models. As an electrode material for supercapacitors, the specific capacitance of the N-PCNS is up to 263 F g-1 at 1 A g-1 and 194 F g-1 at 20 A g-1, revealing superior rate performance. The capacitance retention after 10,000 cycles at 20 A g-1 maintains 96%, demonstrating excellent cycling stability. Our work provides an effective approach to achieve large-scale preparation of high-performance doping carbon materials.

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Publication details

The article was received on 27 Feb 2019, accepted on 08 Apr 2019 and first published on 10 Apr 2019


Article type: Paper
DOI: 10.1039/C9NR01777A
Citation: Nanoscale, 2019, Accepted Manuscript

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    Large-scale fabrication of N-doped porous carbon nanosheet for dye adsorption and supercapacitor application

    Z. Wang, K. Wang, Y. Wang, S. Wang, Z. Chen, J. Chen and J. Fu, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C9NR01777A

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