Toward Facile Preparation and Design of Mulberry-Shaped Poly(2-methylaniline)-Ce 2 (WO 4 ) 3 @CNT Nanocomposite and Its Application for Electrochemical Cd 2+ Ion Detection for Environment Remediation

Novel hybrid material was prepared by adding slurries of poly(N-methylaniline) and cerium tungstate [Ce2(WO4)3] into a conical flask contained dispersed carbon nanotubes. It was characterized by scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Electrical conductivity of poly(N-methylaniline)-Ce2(WO4)3@carbon nanotube samples was determined using four-probe method. The thin layer of poly(N-methylaniline)-Ce2(WO4)3@carbon nanotube was fabricated onto glassy carbon electrode for a selective Cd2+ ion sensor. The calibration plot is linear (r2 = 0.9917) over the large Cd2+ concentration ranges (1.0 nM–1.0 mM). The sensitivity, detection limit is ∼5.138 µA µM−1 cm−2 and ∼0.11 nM (signal-to-noise ratio, at a SNR of 3), respectively.