Synthesis, characterization, and interaction studies of uncapped, PVP, and CTAB capped CuO nanorods with aldicarb and chlorpyrifos

Le résumé fourni par la source

Uncapped copper oxide nanorods (CuOnrs), capped with cetyltrimethylammonium bromide (CTAB-CuOnrs), and polyvinyl pyrrolidine (PVP-CuOnrs) were utilized for the interaction study of the carbamate (Aldicarb (A.D.)) and organophosphate (Chlorpyrifos (C.P.)) pesticides. These nanorods were synthesized using the co-precipitation method, followed by calcination at 350 –ͦ C for 2 hr. X-ray diffraction study confirmed the monoclinic structure of the CuOnrs without any impurities with average crystallite size in the range of 10-12 nm. Field emission scanning and transmission electron microscopy (FE-SEM & TEM) studies confirmed the nanocrystalline structure of CuOnrs, CTAB-CuOnrs, and PVP-CuOnrs having rod-like structures. The contact angle study showed the hydrophilic nature of the uncapped CuOnrs and PVP-CuOnrs with a contact angle of 51 –ͦ & 57 –ͦ , respectively. While CTAB-CuOnrs exhibited hydrophobic nature with a contact angle of more than 90 –ͦ . Interaction study of CuOnrs, CTAB-CuOnrs, and PVP-CuOnrs with A.D. and C.P was conducted using U.V.- vis absorption study (in the 250 - 400 nm region). Uncapped CuOnrs have shown the specific detection with A.D., while CTAB-CuOnrs have shown with C.P. without using any bio-recognition elements. PVP-CuOnrs did not show systematic change with both pesticides confirming the capping agent-dependent specific interaction of the pesticides.

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