A coaxial nanocable textured by a cerium oxide shell and carbon core for sensing nitric oxide

Guorong Hou; Yanjing Yun; Minqiang Wang; Ying Wang; Hao Chen; Longcheng Zhang; Feng Wang; Qingyou Xia; Yang Liu; Zhisong Lu; Shu-Juan Bao

doi:10.1007/s00604-019-3839-1

A coaxial nanocable textured by a cerium oxide shell and carbon core for sensing nitric oxide

Mikrochim Acta. 2019 Nov 15;186(12):789. doi: 10.1007/s00604-019-3839-1.

Authors

Guorong Hou¹, Yanjing Yun¹, Minqiang Wang¹, Ying Wang¹, Hao Chen¹, Longcheng Zhang¹, Feng Wang^{2

3}, Qingyou Xia^{2

3}, Yang Liu⁴, Zhisong Lu⁵, Shu-Juan Bao⁶

Affiliations

¹ Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing, 400715, People's Republic of China.
² State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, 400715, People's Republic of China.
³ Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing, 400715, People's Republic of China.
⁴ Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, No.1 Nongda South Road, Xibeiwang, Haidian District, 100193, People's Republic of China.
⁵ Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing, 400715, People's Republic of China. zslu@swu.edu.cn.
⁶ Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing, 400715, People's Republic of China. baoshj@swu.edu.cn.

PMID: 31732798
DOI: 10.1007/s00604-019-3839-1

Abstract

A corn-like CeO₂/C coaxial cable textured by a cerium oxide shell and a carbon core was designed to sense NO. The carbon core possesses high electrical conductivity, and the CeO₂ surface delivers excellent electrocatalytic activity. The sensor, typically operated at 0.8 V (vs. Ag/AgCl), exhibits a detection limit of 1.7 nM, which is 4-times lower than that of CeO₂ nanotubes based one (at S/N = 3). It also displays wide linear response (up to 83 μM), a sensitivity of 0.81 μA μM^-1 cm^-2, and fast response (2 s). These values are highly competitive to that of a CeO₂ tube (0.92 μA μM^-1 cm^-2 and 2 s). The sensor was used to quantify NO that is released by Aspergillus flavus. Graphical abstractSchematic representation of corn-like CeO₂/C which can more sensitively and effectively detect NO released from A. flavus than when using CeO₂ nanotubes, benefitting from its unique coaxial cable structure.

Keywords: Aspergillus flavus; Biosensor; Electrospinning; Voltammetric determination.

Publication types

Research Support, Non-U.S. Gov't

Abstract

Publication types

Grants and funding