In situ SeO2 promoted synthesis of CdSe/PPy and Se/PPy nanocomposites and their utility in optical sensing for detection of Hg2+ ions
作者： Pawan K Khanna , Sreenu Bhanoth , Vaishali Dhanwe , Anuraj Kshirsagar , Priyesh More
DOI: 10.1039/C5RA14425F
关键词:
摘要: Avoiding the use of any external oxidising agent or initiator for polymerisation process, pyrrole was successfully polymerised to polypyrrole (PPy) using SeO2 as an internal oxidant which leads in situ synthesis selenium and cadmium selenide (Se/PPy CdSe/PPy) nanocomposites by chemical microwave methods. PPy formation during reaction monitored UV-Visible absorption spectroscopy. XRD measurements indicated confirmed CdSe/PPy Se/PPy nanocomposites. SEM images show aggregation small particles form large globules with smooth surfaces. HRTEM reveal presence spherical CdSe Se nanoparticles homogeneously embedded matrix interplanar distances 0.35 nm 0.4 (111) (100) atomic planes, respectively. The as-synthesized were tested detection heavy metal ions. detected mercury ions at 25, 50 100 ppm. This article also describes pre-synthesized precursors
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