SYNTHESIS AND CHARACTERIZATION OF COPPER HYDROXYNITRATE BY HYDROTHERMAL METHOD

Abstract

In this study, copper hydroxynitrate (Cu2(OH)3NO3) was synthesized by hydrothermal method using Cu(NO3)2.3H2O and Na2B4O7.10H2O as reactants with the addition of zwitterionic 3-(N,N-dimethyldodecylammonio) propanesulfonate (SB12) as the surfactant at 180˚C for 24h. The sample was calcined at 400ºC. The prepared samples were characterized by thermal gravimetric analysis (TGA), X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectra, and scanning electron microscopy (SEM) techniques. According to X-ray diffraction results monoclinic copper hydroxynitrate (Cu2(OH)3.NO3) and CuO were obtained at 180ºC, calcined at 400ºC, respectively. TG-DTA analysis showed single stage weight loss. The weight loss of 33.27% at 350°C represents a contemporaneous dissociation of HNO3 and H2O. The FTIR analysis indicates the samples have O-H, O-NO2, N-O and Cu-OH group bands. The SEM results reveal that the copper hydroxynitrate have micrometer-size hexagonal plates.