Synthesis and structural characterization of bismuth-tin nanoparticles in a polymer matrix

Résumé

Nanostructured materials Bi and Si have a potential application as electrodes for detecting heavy metals via electroanalytical techniques such as the separation voltammetry. In this work nanocomposites stable polymer / metal bismuth and tin type were obtained using ultrasonic radiation in dimethylformamide and as a stabilizer a nonionic surfactant. The hydrodynamic diameter of the particles in solution was measured by the technique of dynamic light scattering (DLS), the results showed about 100 nm diameter with low polydispersity for nanocomposites of tin and a bigger size for the bismuth. Nanocomposite films were obtained at 353 and 393 K, the analysis of morphology, composition and microstructure were made by scanning electron microscopy (SEM) coupled with probe EDX and X-ray diffraction (XRD) respectively. The XRD diffraction patterns show different trends of crystallization for the two metals in nanocomposites: amorphous bismuth, and crystalline tin.