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

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 onestep 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 2þ by anodic stripping voltammetry with a linear range of 20 nM -3 mM. The sensitivity and detection limit are 25.6 mA/mM and 4 nM, respectively. The practical application of the proposed electrode has been carried out for the determination of trace levels of Cd 2þ in real water samples.

Carbon nanotube–hydroxyapatite nanocomposite: A novel platform for glucose/O2 biofuel cell

“…The spectrum for HA showed the well-resolved peaks at 565 cm −1 and 604 cm −1 which were attributed to v 4 P-O bending in phosphate group, the peaks at 960 cm −1 were assigned to v 2 OPO bending, and the peaks at 1064 cm −1 were attributed to the P-O stretching (Bhatnagar, 1971;Bhattarai et al, 2008). The split bands, mainly at 1038 cm −1 and 1091 cm −1 , were seemed to be coincided with the formation of a well-crystallized apatite (Yang et al, 2005;Pan et al, 2009). Moreover, a characteristic band corresponding to the hydroxyl group of HA was found at 3428 cm −1 .…”

Barium Hydrogen Phosphate Modified Carbon Paste Electrode for the Simultaneous Determination of Cadmium and Lead by Differential Pulse Anodic Stripping Voltammetry

“…The toxicity of Pb(II) in humans mainly comes from its detrimental mimicking action of occupying the calcium binding sites on numerous calcium-dependent proteins cells, thus resulting in the corresponding impairment of physiological functions [1,2]. Due to unusual long half-life and accumulation in soft tissues like kidney and liver, Cd(II) is of toxicologically interest [3].…”

Multiwalled carbon nanotube wrapped hydroxyapatite, convenient synthesis via microwave assisted solid state metathesis

“…CNTs exhibit an excellent electrical conductivity [5]. Although HA/CNT composites are a promising biomaterial for tissue engineering [6], recently some authors have reported their applications in electrochemistry [7,8]. Several articles have reported the synthesis of HA/CNT composites [6].…”