International Science Community Association Research Journal of Recent Sciences 2277-2502 7 3 2018 03 2 Synthesis of copper nanoparticles and their catalytic activity in oxidation of threonine 14 21 EN Polorigni Botolisam 1 Laboratory of forest researches, Faculty of Sciences, University of Lomé, 01BP 1515 Lomé 01-Togo Adjonou Kossi 2 Laboratory of forest researches, Faculty of Sciences, University of Lomé, 01BP 1515 Lomé 01-Togo Radji Raoufou A. 3 Laboratory of forest researches, Faculty of Sciences, University of Lomé, 01BP 1515 Lomé 01-Togo Kokou Kouami 4 Laboratory of forest researches, Faculty of Sciences, University of Lomé, 01BP 1515 Lomé 01-Togo Rele Rajan V. 1 Central Research Laboratory, Chemistry, D.G. Ruparel College, Dept. of Chemistry, Matunga, Mumbai-400 016, India Tiwatane Prathamesh P. 2 Central Research Laboratory, Chemistry, D.G. Ruparel College, Dept. of Chemistry, Matunga, Mumbai-400 016, India Niharika Nagar 1 Department of Chemistry, Janki Devi Bajaj Government Girls College, Kota (Rajasthan), India Vijay Devra 2 Department of Chemistry, Janki Devi Bajaj Government Girls College, Kota (Rajasthan), India > Research Paper 2017 7 21 2018 03 2 Present study describes the fabrication of CuNPs (copper nanoparticles) by chemical reduction method and L-AA (L-ascorbic acid) use as a reducing as well as capping agent. Size of CuNPs was depending on the various concentration of L-AA. The synthesized CuNPs have resistance to oxidation by atmospheric oxygen for two months. The copper nanoparticles were studied by spectrophotometric techniques. The average sizes of copper nanoparticles were found to be 28, 16, 12 nm at increasing concentrations of L-ascorbic acid respectively. Interestingly, it was observed that, the activity depends on the size of particles. The catalysis by colloidal copper nanomaterials was studied kinetically with the oxidation of L-threonine (Thr) by peroxodi sulfate (PDS) at neutral pH. The copper nanoparticles are expected to be play important role in the field of catalysis and reduce water pollution. Copyright@ International Science Community Association