Synthesis of carbon nanocomposites consisting of nanocellulose-derived carbon and reduced graphene oxide for high-performance captive deionization

Azhar Alowasheeir; Md. Ikram Ul Hoque; Xingtao Xu; Scott W. Donne; Yoshio Bando; Saad M. Alshehri; Tansir Ahamad; Md Shahriar A. Hossain; Yusuke Yamauchi; Nasim Amiralian; Dong Jiang; Yusuke Asakura

doi:10.1039/D5NH00306G

Synthesis of carbon nanocomposites consisting of nanocellulose-derived carbon and reduced graphene oxide for high-performance captive deionization

Azhar Alowasheeir,

†^a Md. Ikram Ul Hoque,

†^bc Xingtao Xu,

^d Scott W. Donne,

^c Yoshio Bando,^efg Saad M. Alshehri,^f Tansir Ahamad,

^f Md Shahriar A. Hossain,

^be Yusuke Yamauchi,

^abh Nasim Amiralian,

*^b Dong Jiang*^ab and Yusuke Asakura

*^a

Author affiliations

* Corresponding authors

^a Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
E-mail: dongjiang@toki.waseda.jp, asa.y@nagoya-u.jp

^b Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, Queensland 4072, Australia
E-mail: n.amiralian@uq.edu.au

^c Discipline of Chemistry, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia

^d Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China

^e School of Mechanical and Mining Engineering, Faculty of Engineering, Architecture, and Information Technology (EAIT), The University of Queensland, Brisbane, QLD, Australia

^f Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia

^g Australian Institute for Innovative Materials, University of Wollongong, North Wollongong 2500, Australia

^h Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea

Abstract

Several types of nanocellulose-derived carbon/reduced graphene oxide (rGO) nanocomposites are synthesized using three nanocellulose types: cellulose nanofibers (CNF), long cellulose nanocrystals (CNC-L), and short cellulose nanocrystals (CNC-S). The nanocomposites achieve a large surface area due to the small nanocellulose fibers acting as spacers. For the capacitive deionization (CDI) test, the CNC-L/rGO is selected and compared with the rGO prepared without nanocelluloses. It achieves a high sodium ion adsorption capacity of 45.67 mg g⁻¹ and a high salt adsorption capacity of 57.08 mg g⁻¹ at a NaCl concentration of 2000 mg L⁻¹. Excellent stability and performance are also confirmed across varying saline concentrations. These outstanding properties make the CNC-L/rGO a promising electrode material for efficient and sustainable water desalination.

This article is part of the themed collection: Celebrating 10 Years of Nanoscale Horizons: 10th Anniversary Collection

Nanoscale Horizons

Synthesis of carbon nanocomposites consisting of nanocellulose-derived carbon and reduced graphene oxide for high-performance captive deionization

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Synthesis of carbon nanocomposites consisting of nanocellulose-derived carbon and reduced graphene oxide for high-performance captive deionization

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