TY - JOUR ID - 16070 TI - Catalytic and antibacterial activity of copper nanoparticle-starch composite JO - Advanced Materials Proceedings JA - AMP LA - en SN - 2002-4428 AU - Dinda, Gargi AU - Halder, Dipankar AU - Mitra, Atanu AD - Department of Food Technology & Biochemical Engineering, Jadavpur University, Kolkata 700032. India AD - Department of Chemistry, Shree Chaitanya College, Habra, West Bengal, India Y1 - 2018 PY - 2018 VL - 3 IS - 1 SP - 2 EP - 7 KW - green synthesis KW - CuNP-starch composite KW - catalytic efficiency KW - pollutants degradation KW - antibacterial activity DO - 10.5185/amp.2018/651 N2 - We report the successful synthesis of copper nanoparticle (CuNP)-starch composite employing low cost green protocol without inert gas protection. UV-Vis spectroscopy, X-Ray diffraction (XRD) and Transmission electron microscopy (TEM) were used to characterize the CuNP-starch composite. Mono-disperse almost spherical CuNP having average diameter 4.02 ± 0.076 nm was obtained. The catalytic activity of the as-synthesized CuNP-starch composite during reduction of pollutants, like, 4-nitrophenol (4-NP) and dyes, Eosine Blue (EB), Eriochrome Black T (EBT) and Brilliant Cresyl Blue (BCB by NaBH4 has been investigated. High catalytic efficiency of the composite was demonstrated by rapid decrease of the intensity of the UV-Vis absorption peaks at respective λmax of the pollutants with time when reaction mixture contained NaBH4 and small quantity of CuNP-starch composite. The rate constant of each processes was calculated by considering that the reactions follow pseudo-first-order kinetics with respect to substrate.  The obtained rate constants for 4-NP, EB, EBT and BCB are 0.021S-1, 0.011S-1, 0.036S-1 and 0.032S-1 respectively. The other application, antibacterial activity was tested against Gm positive and Gm negative bacteria. Plate count and minimum inhibitory concentration (MIC) studies show higher susceptibility of Gm positive bacteria towards CuNP-starch composite. The as-synthesized CuNP-starch composite may find potential application in the field of environmental remedies and antibacterial formulations. Copyright©2018 VBRI Press. UR - https://amp.iaamonline.org/article_16070.html L1 - https://amp.iaamonline.org/article_16070_e85b73cd866e81a2960d9db7c49917f0.pdf ER -