A Facile and Low-Cost Route to Heteroatom Doped Porous Carbon Derived from Broussonetia Papyrifera Bark with Excellent Supercapacitance and CO2 Capture Performance.

Tongye Wei,Yong Gao,Qi Zhang,Huaming Li,Xiaolin Wei

doi:10.1038/srep22646

Tongye Wei, Yong Gao + Show 3 more

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https://doi.org/10.1038/srep22646

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Abstract

In this work, we present a facile and low-cost approach to synthesize heteroatom doped porous carbon via hydrothermal treatment of stem bark of broussonetia papyrifera (BP) as the biomass precursor in diluted sulfuric acid, and following thermal activation by KOH at 800 °C. The morphology, structure and textural property of the prepared porous carbon (PC) are investigated by scanning electron microscopy, transmission electron microscopy, N2 sorption isotherms, and X-ray photoelectron spectroscopy. The porous carbon possesses a high BET surface area of 1759 m2 g−1 and an average pore size of 3.11 nm as well as hetero-oxygen (9.09%) and nitrogen (1.7%) doping. Such porous carbon shows outstanding capacitive performances of 416 F g−1 and 300 F g−1 in three and two-electrode systems, respectively. As a solid-state adsorbent, the obtained porous carbon has an excellent CO2 adsorption capacity at ambient pressures of up to 6.71 and 4.45 mmol g−1 at 0 and 25 °C, respectively. The results present one novel precursor-synthesis route for facile large-scale production of high performance porous carbon for a variety of great applications including energy storage and CO2 capture.

Highlights

With potential to create significant economic valorisation, is highly desired
Heteroatom doped porous carbon with high BET surface area was prepared via a two-step progress, in which the broussonetia papyrifera (BP) stem bark was first hydrothermal treated in 1 M diluted sulfuric acid and thermal activated by KOH at 700~900 °C
In the first step of hydrothermal treatment, the BP stem barks undergo acid-catalyzed dehydration, fragmentation, rearrangement and polymerization reactions to produce acid-insoluble intermediate biochar including spherical conjugated aromatic carbonaceous materials[20,21,22] and pseudo-lignin, which consists of carbonyl, carboxylic, aromatic and aliphatic structures

Summary

Papyrifera Bark with Excellent

We present a facile and low-cost approach to synthesize heteroatom doped porous carbon via hydrothermal treatment of stem bark of broussonetia papyrifera (BP) as the biomass precursor in diluted sulfuric acid, and following thermal activation by KOH at 800 °C. We prepared hetero-oxygen (9.09%) and -nitrogen (1.7%) co-doped porous carbon with a high BET surface area via hydrothermal treatment of stem bark with complex multilayered structure from BP as the biomass precursor, and following thermal activation by KOH at 800 °C. The applications of this novel heteroatom doped porous carbon in high-power supercapacitors and CO2 capture are demonstrated

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