Cationic surfactant assisted morphology of Ag@Cu, and their catalytic reductive degradation of Rhodamine B

We describes the UV-visible spectroscopic and transmission electron microscopic evidence to the reactivity of Cu2+, and Ag+ towards hydrazine for the synthesis of cetyltrimethylammonium bromide, CTAB, capped spherical hetero-structure and hexahedral Ag@Cu. The conventional techniques like, UV-visible, TEM, SEM, EDS, and FT-IR were used to the characterization. The catalytic reductive degradation of Rhodamine B (RB) by using Ag@Cu bimetallic nanoparticles as a catalyst has been reported for the first time in this study. The decrease in [RB] was monitored by UV-visible spectroscopy. The [Ag@Cu] = 6.6 x 10(-5) mol dm(-3) exhibited remarkable catalytic activity towards [RB] = 3.5 x 10(-5) mol dm(-3) in presence of [NaBH4] = 13 x 10(-3) mol dm(-3), with a degradation efficiency of ca. 100% in 4 min. The experimental data revealed that the removal of RB increased with increasing the [catalyst loading] and [NaBH4]. Apparent-first order rate constants, turnover frequency, activation parameters (E-a, AH(#), and Delta S-#) have been calculated and discussed. A possible mechanism for the de-colorization of RB has been proposed. (C) 2017 Elsevier B.V. All rights reserved.