Title :
Synthesis of Polyaniline/Graphene Composites and Its Application in Detecting Heavy Metal Ions
Author :
Chang Yanhong ; Wang Bin ; Luo Hui ; Zhi Linjie
Author_Institution :
Dept. of Environ. Eng., Univ. of Sci. & Technol. Beijing, Beijing, China
Abstract :
Polyaniline/graphene nanocomposite (PANI/G) was synthesized by an in situ polymerization procedure. The microstructure of PANI/G was characterized to be a mixture of PANI nanowires and graphene sheets by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Energy Dispersive X-Ray Fluoresence Spectrometer (EDX). PANI/G was used to modify glassy carbon electrodes to detect heavy metal ions in aqueous phase by the electrochemical methods. To make a contrast, Polyaniline (PANI) modified glassy-carbon electrode was also used to detect the mixed heavy metal ions including Cd2+, Pb2+, Cu2+ by Anodic Stripping Voltammetry (ASV). Results showed that PANI/G exhibiting higher sensitivity in detecting heavy metal ions than PANI and showing a great selectivity towards Pb2+. Then the electrochemical behavior in detecting Pb2+ by PANI/G was investigated. The detection limit for Pb2+ was 10-8mol/L, being lower than that of national sanitary standard for drinking water.
Keywords :
X-ray chemical analysis; X-ray fluorescence analysis; electrochemical electrodes; graphene; nanocomposites; nanofabrication; nanowires; polymerisation; polymers; scanning electron microscopy; transmission electron microscopy; voltammetry (chemical analysis); water pollution; C; PANI nanowire; anodic stripping voltammetry; drinking water; electrochemical method; energy dispersive X-ray fluoresence spectrometer; graphene nanocomposite; heavy metal ion detection; polyaniline nanocomposite; polymerization procedure; scanning electron microscopy; transmission electron microscopy; Carbon; Electrodes; Ions; Materials; Metals; Nanowires; Scanning electron microscopy;
Conference_Titel :
E-Product E-Service and E-Entertainment (ICEEE), 2010 International Conference on
Conference_Location :
Henan
Print_ISBN :
978-1-4244-7159-1
DOI :
10.1109/ICEEE.2010.5660640