Facile and controllable synthesis of hydroxyapatite/graphene hybrid materials with enhanced sensing performance towards ammonia

Qing Zhang; Yong Liu; Ying Zhang; Huixia Li; Yanni Tan; Lanlan Luo; Junhao Duan; Kaiyang Li; Craig E. Banks

doi:10.1039/C5AN00622H

Facile and controllable synthesis of hydroxyapatite/graphene hybrid materials with enhanced sensing performance towards ammonia†

Qing Zhang,^a Yong Liu,*^a Ying Zhang,^b Huixia Li,^a Yanni Tan,^a Lanlan Luo,^a Junhao Duan,^a Kaiyang Li^a and Craig E. Banks*^c

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* Corresponding authors

^a State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China
E-mail: yonliu@csu.edu.cn
Fax: +86-731-88836939
Tel: +86-731-88836939

^b College of Science, Huazhong Agricultural University, Wuhan 430070, PR China

^c Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, UK
E-mail: c.banks@mmu.ac.uk
Web: http://www.craigbanksresearch.com
Fax: +44 (0)1612476831
Tel: +44 (0)1612471196

Abstract

In this work, needle-like and micro-spherical agglomerates of nanocrystalline hydroxyapatite (HA) were successfully assembled on the surface of graphene sheets with the aid of dopamine having two roles, as a template and a reductant for graphite oxide during the process of self-polymerization. The crystalline structure and micromorphology of HA can be conveniently regulated by controlling the mineralization route either with a precipitation (cHA/GR) or biomimetic methodology (bHA/GR). Both the composites exhibit improvements of ∼150% and ∼250% in sensitivity towards the sensing of ammonia at room temperature, compared with that of bare graphene. The combination of the multi-adsorption capability of HA and the electric conductivity of graphene is proposed to be the major reason for the observed enhancements. Gas sensing tests demonstrated that the HA/GR composites exhibit excellent selectivity, high sensitivity and repeatable stability towards the analytical sensing of ammonia.

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DOI: https://doi.org/10.1039/C5AN00622H
Article type: Paper
Submitted: 30 Mar 2015
Accepted: 26 May 2015
First published: 27 May 2015
This article is Open Access

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Analyst, 2015,140, 5235-5242

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Facile and controllable synthesis of hydroxyapatite/graphene hybrid materials with enhanced sensing performance towards ammonia

Q. Zhang, Y. Liu, Y. Zhang, H. Li, Y. Tan, L. Luo, J. Duan, K. Li and C. E. Banks, Analyst, 2015, 140, 5235 DOI: 10.1039/C5AN00622H

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Facile and controllable synthesis of hydroxyapatite/graphene hybrid materials with enhanced sensing performance towards ammonia†

Abstract

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Facile and controllable synthesis of hydroxyapatite/graphene hybrid materials with enhanced sensing performance towards ammonia

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