fig1
Figure 1. Characterization of Cu/TiO2 nanocatalyst (Cu/TiO2). (A) The HAADF scanning transmission electron microscopic image and elemental maps of Cu/TiO2 NPs; High-resolution XPS spectra: the Ti 2p region for (B) TiO2 and (C) Cu/TiO2; (D) The UV-Vis DRS of TiO2 and Cu/TiO2; (E) Photographs of TiO2 and Cu/TiO2 powders. HAADF: High-angle annular dark-field; NPs: nanoparticles; XPS: X-ray photoelectron spectra; UV-Vis DRS: ultraviolet-visible diffuse reflectance spectra.
