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Title: Nanostructured Electrochemical Sensors Based on Functionalized Nanoporous Silica for Voltammetric Analysis of Lead, Mercury and Copper

Abstract

We have successfully developed electrochemical sensors based on functionalized nanostructured materials for voltammetric analysis of toxic metal ions. Glycinyl-urea self-assembled monolayers on mesoporous silica (Gly-UR SAMMS) was incorporated in carbon paste electrodes for the detection of toxic metal ions such as lead, copper, and mercury based on adsorptive stripping voltammetry (AdSV). The electrochemical sensor yields a linear response at low ppb level of Pb2+ (i.e., 2.5 to 50 ppb) after a 2 minute preconcentration period, with reproducible measurements (%RSD = 3.5, N = 6), and excellent detection limits (at few ppb). By exploiting the interfacial functionality of Gly-UR SAMMS, the sensor is selective for the target species, does not require the use of a mercury film, and can be easily regenerated in dilute acid solution. The rigid, open, parallel pore structure, combined with suitable interfacial chemistry of SAMMS, also results in fast analysis times (2-3 minutes). The nanostructured SAMMS materials enable the development of miniature sensing devices that are compact and low-cost, have low-energy-consumption, and are easily integrated into field-deployable units. Keywords: electrochemical sensor, glycinyl-urea, self-assembled monolayer, mesoporous silica, lead, mercury, copper, adsorptive stripping voltammetry.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
15016901
Report Number(s):
PNNL-SA-44507
6899; KP1302000; TRN: US200516%%1049
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Nanoscience and Nanotechnology, 5(9):1537-1540
Additional Journal Information:
Journal Volume: 5; Journal Issue: 9
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; VOLTAMETRY; LEAD; COPPER; MERCURY; PORE STRUCTURE; SENSITIVITY; SILICA; PROBES; DESIGN; NANOSTRUCTURES; SAMMS, electrochemical sensors, nanotechnology; Environmental Molecular Sciences Laboratory

Citation Formats

Yantasee, Wassana, Fryxell, Glen E, Conner, Marianne M, and Lin, Yuehe. Nanostructured Electrochemical Sensors Based on Functionalized Nanoporous Silica for Voltammetric Analysis of Lead, Mercury and Copper. United States: N. p., 2005. Web. doi:10.1166/jnn.2005.324.
Yantasee, Wassana, Fryxell, Glen E, Conner, Marianne M, & Lin, Yuehe. Nanostructured Electrochemical Sensors Based on Functionalized Nanoporous Silica for Voltammetric Analysis of Lead, Mercury and Copper. United States. https://doi.org/10.1166/jnn.2005.324
Yantasee, Wassana, Fryxell, Glen E, Conner, Marianne M, and Lin, Yuehe. 2005. "Nanostructured Electrochemical Sensors Based on Functionalized Nanoporous Silica for Voltammetric Analysis of Lead, Mercury and Copper". United States. https://doi.org/10.1166/jnn.2005.324.
@article{osti_15016901,
title = {Nanostructured Electrochemical Sensors Based on Functionalized Nanoporous Silica for Voltammetric Analysis of Lead, Mercury and Copper},
author = {Yantasee, Wassana and Fryxell, Glen E and Conner, Marianne M and Lin, Yuehe},
abstractNote = {We have successfully developed electrochemical sensors based on functionalized nanostructured materials for voltammetric analysis of toxic metal ions. Glycinyl-urea self-assembled monolayers on mesoporous silica (Gly-UR SAMMS) was incorporated in carbon paste electrodes for the detection of toxic metal ions such as lead, copper, and mercury based on adsorptive stripping voltammetry (AdSV). The electrochemical sensor yields a linear response at low ppb level of Pb2+ (i.e., 2.5 to 50 ppb) after a 2 minute preconcentration period, with reproducible measurements (%RSD = 3.5, N = 6), and excellent detection limits (at few ppb). By exploiting the interfacial functionality of Gly-UR SAMMS, the sensor is selective for the target species, does not require the use of a mercury film, and can be easily regenerated in dilute acid solution. The rigid, open, parallel pore structure, combined with suitable interfacial chemistry of SAMMS, also results in fast analysis times (2-3 minutes). The nanostructured SAMMS materials enable the development of miniature sensing devices that are compact and low-cost, have low-energy-consumption, and are easily integrated into field-deployable units. Keywords: electrochemical sensor, glycinyl-urea, self-assembled monolayer, mesoporous silica, lead, mercury, copper, adsorptive stripping voltammetry.},
doi = {10.1166/jnn.2005.324},
url = {https://www.osti.gov/biblio/15016901}, journal = {Journal of Nanoscience and Nanotechnology, 5(9):1537-1540},
number = 9,
volume = 5,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2005},
month = {Thu Sep 01 00:00:00 EDT 2005}
}