Abstract
In this paper, a facile two-step process of CuO/Ag and CuO/Ag/Au nanocomposites (NCs) were fabricated for the first time. The Powder X-ray Diffraction (PXRD) pattern revealed the existence of single-phase monoclinic structure of CuO and Face Centered Cubic (FCC) phase of Ag, Au and no other external phase impurities were observed from the prepared materials. In the photoluminescence (PL) studies, charge carrier trapping and fate of electron–hole pairs in CuO/Ag and CuO/Ag/Au NCs were investigated. The band-gap values of prepared CuO/Ag and CuO/Ag/Au NCs were calculated via UV–Visible Spectroscopy using Tauc’s relation and found to be 2.3 eV and 2.1 eV, respectively. The flake-like morphologies were observed from the prepared CuO/Ag and CuO/Ag/Au NCs using FESEM analysis. The as-prepared CuO/Ag and CuO/Ag/Au NCs were evaluated by catalytic performances using the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) and Methelyne blue (MB) to Leuco Methylene blue (LMB) with the presence of NaBH4 in aqueous solution. Thus the result showed the synergistic effects between Ag, Au and CuO in CuO/Ag/Au NCs acted as suitable support to elevate the catalytic performance of M/CuO materials, which may be used as a potential application in industrial production.
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