Melamine-supported nickel oxide nanoparticles as a good alternative to conventional copper catalysts for the regioselective synthesis of triazole derivatives in water

Nickel oxide nanoparticles supported on melamine as a good alternative to conventional copper catalysts have been prepared and used for the regioselective synthesis of triazole derivatives in water. This catalyst can be reused several times without any significant decrease in the catalytic activity. The nanocatalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM), inductively coupled plasma (ICP), X-ray fluorescence (XRF) and Brunauer–Emmett–Teller (BET) surface area analysis.