One-step electrochemical deposition of a graphene-ZrO₂ nanocomposite: Preparation, characterization and application for detection of organophosphorus agents

Journal Article · Wed Apr 27 00:00:00 EDT 2011 · Journal of Materials Chemistry

DOI:https://doi.org/10.1039/C1JM10696A· OSTI ID:1018120

Du, Dan; Liu, Juan; Zhang, Xiao-Yan; Cui, Xiao-Li; Lin, Yuehe

This paper described the preparation, characterization, and electrochemical properties of a graphene-ZrO₂ nanocomposite (GZN) and its application for both the enrichment and detection of methyl parathion (MP). GZN was fabricated using electrochemical deposition and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), which showed the successful formation of nanocomposites. Due to the strong affinity to the phosphoric group and the fast electron-transfer kinetics of GZN, both the extraction and electrochemical detection of organophosphorus (OP) agents at the same GZN modified electrochemical sensor was possible. The combination of solid-phase extraction and stripping voltammetric analysis allowed fast, sensitive, and selective determination of MP in garlic samples. The stripping response was highly linear over the MP concentrations ranging from 0.5 ng mL^-1 to 100 ng mL^-1, with a detection limit of 0.1 ng mL^-1. This new nanocomposite-based electrochemical sensor provides an opportunity to develop a field-deployable, sensitive, and quantitative method for monitoring exposure to OPs.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1018120
• Report Number(s): PNNL-SA-80611; JMACEP; 400412000; TRN: US201113%%558
• Journal Information: Journal of Materials Chemistry, Vol. 21, Issue 22; ISSN 0959-9428
• Publisher: Royal Society of Chemistry
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AFFINITY
DEPOSITION
DETECTION
ELECTRON TRANSFER
GARLIC
KINETICS
MONITORING
PARATHION
SCANNING ELECTRON MICROSCOPY
SENSITIVITY
SENSORS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
nanocomposite
electrochemical deposition