Hydrothermal synthesis and characterization of CuO–CoO/TiO2 for photocatalytic degradation of methylene blue under visible light and catalytic reduction of P-nitrophenol

Hydrothermal synthesis and characterization of CuO–CoO/TiO2 for photocatalytic degradation of methylene blue under visible light and catalytic reduction of P-nitrophenol

Z Moradi Shammi, AH Kianfar, MM Momeni

Abstract

CuO–CoO/TiO2 has been prepared using TiO2-P-25, Cu(acac)2/Co(acac)3 (sample 1) and Cu(NO3)2/Co (NO3)2 (sample 2) by hydrothermal method. DRS, CV, EDX, XRD, XPS, Raman, FE-SEM, and TEM have been used for structural, optical, and morphological analyses of the samples. The anatase phase formation of the samples has been identified by powder X-ray diffraction and Raman spectroscopy. Cu and Co metals were present as CuO and CoO in both samples, according to XPS and Raman spectroscopy data. UV–Vis–NIR reflectance and cyclic voltammetry analysis were used to determine the absorption nature of the samples. Through these techniques, the band gap values of samples 1 and 2 were determined as 2.0 and 2.5 eV, respectively. Nanotube/nanosheet and nanoparticle morphologies were shown by samples 1 and 2, respectively, based on transmission electron microscopy (TEM) results …

Journal of Materials Science: Materials in Electronics