期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 220, 期 -, 页码 749-754出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.06.016
关键词
Fe2O3; MoS2; Nitrite; Sensor; Electrocatalysis
资金
- National Natural Science Foundation of China [21307104]
- Natural Science Foundation of Jiangsu Province, China [BK20130438]
- Jiangsu Key Laboratory of Environmental Material and Engineering [K13059, K14015]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
A novel ferric oxide/molybdenum sulfide (Fe2O3@MoS2) modified glassy carbon electrode (GCE) was fabricated by drop casting Fe2O3@MoS2 and Nafion suspension onto the surface of GCE. Scanning electron microscopy (SEM) image indicates the Fe2O3@MoS2 has a flower-like nanostructure. Both cyclic voltammetry (CV) and linear sweep voltammetry (LSV) results show the Fe2O3@MoS2 modified GCE exhibits excellent electrochemical activity in a 0.1 M phosphate buffered saline (PBS) compared to the Fe2O3 and MoS2 modified GCE. CV results also show the Fe2O3@MoS2 has excellent electrocatalytic behavior to nitrite in a pH 4.0 PBS. The amperometric response result indicates the Fe2O3@MoS2 modified GCE can be used to determine nitrite concentration in a wide linear range of 2.0 and 6730 mu M with a detection limit of 1.0 mu M. (C) 2015 Elsevier B.V. All rights reserved.
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