Electrochemical sensing of 4-nitrochlorobenzene based on carbon nanohorns/graphene oxide nanohybrids

Gangbing Zhu; Heng Sun; Bin Zou; Zhenjiang Liu; Ning Sun; Yinhui Yi; Kwok-Yin Wong

doi:10.1016/j.bios.2018.01.058

Electrochemical sensing of 4-nitrochlorobenzene based on carbon nanohorns/graphene oxide nanohybrids

Biosens Bioelectron. 2018 May 30:106:136-141. doi: 10.1016/j.bios.2018.01.058. Epub 2018 Jan 31.

Authors

Gangbing Zhu¹, Heng Sun², Bin Zou³, Zhenjiang Liu², Ning Sun⁴, Yinhui Yi², Kwok-Yin Wong⁵

Affiliations

¹ Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
² School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China.
³ School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
⁴ Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
⁵ Department of Applied Biology and Chemical Technology, and the State Key Laboratory of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. Electronic address: kwok-yin.wong@polyu.edu.hk.

PMID: 29414080
DOI: 10.1016/j.bios.2018.01.058

Abstract

Owing to the harmful nature of 4-nitrochlorobenzene (4-NCB, one toxic organic pollutant) and the low cost, high sensitivity and ease of operation of electrochemical method, it is highly desirable to develop effect electrochemical sensor for the detection of 4-NCB. Herein, by partially unzipping carbon nanohorns (CNHs) via a simple wet-chemistry method, CNHs and graphene oxide (GO) (CNHs/GO) nanohybrids were produced for sensing 4-NCB with synergistic properties. While the retained CNHs offer a path for rapid electron transport, the GO sheets formed by partially unzipping CNHs provide abundant active sites, further increase in surface area as well as improved dispersibility of the CNHs/GO. Our results show that the CNHs/GO modified electrode has excellent sensitivity to 4-NCB with a wide linear response range and a detection limit as low as 10 nM.

Keywords: 4-nitrochlorobenzene; Carbon nanohorns; Electrochemical sensor; Graphene; Modified electrode; Nanomaterial.

MeSH terms

Biosensing Techniques*
Chlorobenzenes / chemistry
Chlorobenzenes / isolation & purification*
Electrochemical Techniques*
Graphite / chemistry
Limit of Detection
Nanotubes, Carbon / chemistry
Oxides / chemistry

Substances

Chlorobenzenes
Nanotubes, Carbon
Oxides
Graphite
chlorobenzene