Abstract
CdS/PAM nanocomposites have been successfully synthesized in situ via a ultrasound-assisted route under ambient condition, employing CdCl(2) and Na(2)S(2)O(3) as Cd(2+) and S(2-) ion sources and acrylamide (AM) and (NH(4))(2)S(2)O(8) as organic monomers and initiating reagents, respectively. The results from X-ray powder diffraction (XRD) analysis and the IR spectrum of the final product showed the formation of CdS nanoparticles and the polymerization of AM monomers. SEM observations showed that the CdS/PAM nanocomposites could film on the quartz substrate and some holes in which many nanorods regularly arranged distributed on the film. The UV-vis absorption and PL spectra of CdS/PAM nanocomposites obviously differed from those of CdS nanoparticles prepared under the same conditions due to the presence of PAM. The electrochemical research showed that CdS/PAM nanocomposites had a stronger ability to promote electron transfers between Hb and the Au electrode than CdS nanoparticles prepared under the same conditions. A possible formation mechanism was also suggested based on the results of experiments.
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