期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 160, 期 1, 页码 306-311出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.07.053
关键词
Exfoliated graphene oxide; Lead oxide; Arsenic detection; Stripping voltammetry
资金
- DST, India
Reduced graphene oxide-lead dioxide composite is formed when EGO coated surface is electrochemically reduced along with lead ions in the solution. This composite has been shown to be an excellent material for low level detection of arsenic. Various functional groups present on EGO, in a wide pH range of 2-11, are responsible for the favorable interaction between metal ion and the modified electrode surface and subsequent trace level detection. X-ray photoelectron spectroscopy and Raman spectroscopic techniques confirm the formation of composite and its composition. Thin layer of lead dioxide along with reduced exfoliated graphene oxide has been shown to be responsible for the enhanced activity of the surface. The detection limit of arsenic is found to be 10 nM. This study opens up the possibility of using the composites for sensing applications and possibly simultaneous detection of arsenic and lead. (C) 2011 Elsevier B.V. All rights reserved.
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