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Updated: Jan 23, 2026

UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media
Published on: October 25, 2021
Characterization of Cu2O/TiO2NTs nanomaterials using EDXRF, XRD and DRS for photocatalytic applications
Gabrielle Sarto1, Fábio Lopes2, Felipe R Dos Santos2
1Laboratory of Environmental Electrochemistry (LabEA), Chemistry Department, Londrina State University, Londrina, Paraná, Brazil.
Abstract:
TiO2 nanotube arrays (TiO2NTs) were decorated with Cu2O nanoparticles by pulse electrochemical deposition. The Cu2O nanoparticles were uniformly distributed onto TiO2NTs surface and with diameter varying between 50 and 200 nm. The effects of the independent variables on the photocatalytic response were simultaneously assessed by a multivariate statistical design. Energy-Dispersive X-Ray Fluorescence, X-Ray Diffraction, FEG-SEM and Diffuse Reflectance Spectroscopy were employed to Cu2O/TiO2NTs characterization. The Cu2O films obtained on TiO2NTs surface were crystalline. DRS analysis confirmed that the modification of TiO2NTs with Cu2O nanoparticles improved the quantum efficiency of the material. The Cu2O/TiO2NTs photoelectrode shows an intense absorption peak in the visible region decreasing the band gap energy from 3.20eV for TiO2NTs to 2.96 eV for Cu2O/TiO2NTs.
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