Self-Powered Sensor for Trace Hg2+ Detection
- 28 April 2011
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 83 (10), 3968-3972
- https://doi.org/10.1021/ac2001884
Abstract
A self-powered electrochemical sensor has been facilely designed for sensitive detection of Hg(2+) based on the inhibition of biocatalysis process of enzymatic biofuel cell (BFC) for the first time. The as-prepared one-compartment BFC, which was consisted of alcohol dehydrogenase supported on single-walled carbon nanohorns-based mediator system as the anode and bilirubin oxidase as the cathodic biocatalyst, generated an open circuit potential (V(oc)) of 636 mV and a maximum power density of 137 μW cm(-2). It was interestingly found that the presence of Hg(2+) would affect the performance of the constructed BFC (e.g., V(oc)). Taking advantage of the inhibitive effect of Hg(2+), a novel self-powered Hg(2+) sensor has been developed, which showed a linear range of 1-500 nM (R(2) = 0.999) with a detection limit of 1 nM at room temperature. In addition, this BFC-type sensor exhibited good selectivity for Hg(2+) against other common environmental metal ions, and the feasibility of the method for Hg(2+) detection in actual water samples (i.e., tap, ground, and lake water) was demonstrated with satisfactory results.Keywords
This publication has 27 references indexed in Scilit:
- Nanoengineered Electrically Contacted Enzymes on DNA Scaffolds: Functional Assemblies for the Selective Analysis of Hg2+ IonsJournal of the American Chemical Society, 2010
- Ultrasensitive electrochemical sensor for mercury (II) based on target-induced structure-switching DNABiosensors and Bioelectronics, 2010
- Potentially implantable miniature batteriesAnalytical and Bioanalytical Chemistry, 2006
- MercuryII-Mediated Formation of Thymine−HgII−Thymine Base Pairs in DNA DuplexesJournal of the American Chemical Society, 2006
- Mercury in environmental samples: Speciation, artifacts and validationTrAC Trends in Analytical Chemistry, 2005
- Enzymatic Biofuel Cells for Implantable and Microscale DevicesChemical Reviews, 2004
- Review: Environmental exposure to mercury and its toxicopathologic implications for public healthEnvironmental Toxicology and Water Quality, 2003
- Determination of Memory-Prone Elements Using Direct Injection High Efficiency Nebulizer Inductively Coupled Plasma Mass SpectrometryApplied Spectroscopy, 2002
- A Large Bore-Direct Injection High Efficiency Nebulizer for Inductively Coupled Plasma SpectrometryAnalytical Chemistry, 2000
- Microfabricated Array of Iridium Microdisks as a Substrate for Direct Determination of Cu2+or Hg2+Using Square-Wave Anodic Stripping VoltammetryAnalytical Chemistry, 1999