Fabrication and Characterization of Carbon Nanotube-Hydroxyapatite Nanocomposite: Application to Anodic Stripping Voltammetric Determination of Cadmium

✍ Scribed by Dawei Pan; Yuane Wang; Zhaopeng Chen; Tanji Yin; Wei Qin

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 482 KB
• Volume: 21
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/elan.200804492

✦ Synopsis

Abstract

A novel chemically modified electrode for stripping determination of cadmium is presented in this paper, based on carbon nanotube‐hydroxyapatite (CNT‐HAP) nanocomposite, which can be prepared by an easy and effective one‐step sonication. The newly synthesized nanocomposite was characterized with FTIR, TEM, and electrochemical methods. Due to the combination of the strong absorption ability of HAP and excellent electroanalytical properties of CNTs, the GC/CNT‐HAP electrode has been successfully used for determination of Cd^2+^ by anodic stripping voltammetry with a linear range of 20 nM–3 μM. The sensitivity and detection limit are 25.6 μA/μM and 4 nM, respectively. The practical application of the proposed electrode has been carried out for the determination of trace levels of Cd^2+^ in real water samples.