Hg(II) Ion Detection Using Thermally Reduced Graphene Oxide Decorated with Functionalized Gold Nanoparticles
- 20 April 2012
- journal article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 84 (9), 4057-4062
- https://doi.org/10.1021/ac3000336
Abstract
Fast and accurate detection of aqueous contaminants is of significant importance as these contaminants raise serious risks for human health and the environment. Mercury and its compounds are highly toxic and can cause various illnesses; however, current mercury detectors suffer from several disadvantages, such as slow response, high cost, and lack of portability. Here, we report field-effect transistor (FET) sensors based on thermally reduced graphene oxide (rGO) with thioglycolic acid (TGA) functionalized gold nanoparticles (Au NPs) (or rGO/TGA-AuNP hybrid structures) for detecting mercury(II) ions in aqueous solutions. The lowest mercury(II) ion concentration detected by the sensor is 2.5 × 10(-8) M. The drain current shows rapid response within less than 10 s after the solution containing Hg(2+) ions was added to the active area of the rGO/TGA-AuNP hybrid sensors. Our work suggests that rGO/TGA-AuNP hybrid structures are promising for low-cost, portable, real-time, heavy metal ion detectors.This publication has 30 references indexed in Scilit:
- Methods for the determination and speciation of mercury in natural waters—A reviewAnalytica Chimica Acta, 2010
- Electronic Transport Properties of Individual Chemically Reduced Graphene Oxide SheetsNano Letters, 2007
- Detection of individual gas molecules adsorbed on grapheneNature Materials, 2007
- The rise of grapheneNature Materials, 2007
- Low dose mercury toxicity and human healthEnvironmental Toxicology and Pharmacology, 2005
- Status review of mercury control options for coal-fired power plantsFuel Processing Technology, 2003
- A mercury(II) ion-selective electrode based on neutral salicylaldehyde thiosemicarbazoneTalanta, 2003
- Development of a ‘collect and punch’ cold vapour inductively coupled plasma mass spectrometric method for the direct determination of mercury at nanograms per litre levelsJournal of Analytical Atomic Spectrometry, 1998
- Determination of mercury in filtered sea-water by flow injection with on-line oxidation and atomic fluorescence spectrometric detectionJournal of Analytical Atomic Spectrometry, 1996
- Determination of mercury(II), monomethylmercury cation, dimethylmercury and diethylmercury by hydride generation, cryogenic trapping and atomic absorption spectrometric detectionAnalytica Chimica Acta, 1994