X-ray photoelectron spectroscopic investigations of Cu2O nanoparticles

Synthesis of novel Cu2O/BiOCl heterojunction nanocomposites and their enhanced photocatalytic activity under visible light

“…7b compared the XPS scans over Cu 2p 3/2 peak of 1Cu 2 O/4BiOCl photocatalyst before and after four cycling runs. Before photocatalytic reaction, the binding energy of Cu 2p 3/2 was 932.2 eV, which was in good agreement with the standard binding energy of Cu + in Cu 2 O [36]. While after photocatalytic reaction for four runs, Cu 2p 3/2 peak of the nanocomposites could be decomposed into two peaks: the main peak at 932.2 eV known as the characteristic of Cu + in Cu 2 O, and the other weak peak centered at 941.4 eV attributed to Cu 2+ [36].…”

Synthesis of Cu2O/T-ZnOW nanocompound and characterization of its photocatalytic activity and stability property under UV irradiation

“…8(c)-A curve, the broad O 1s core-level spectrum can be fitted to two peaks by Gaussian rule. The peak at a lower binding energy of 530.3 eV agrees with lattice oxygen (O L ) in mental oxide such as CuO, Cu 2 O and T-ZnO W [36][37][38][39], while the other peak at 531.8 eV is attributed to hydroxide and/or chemisorbed oxygen (O H ) [37,40].…”

“…The peak at 942.0 eV is considered to be a satellite peak of CuO, which can confirm the presence of CuO [41,42]. This is attributed to the fact that a small fraction of Cu 2 O surface can be oxidized to CuO during drying under ambient condition or exposing to humid air [40,42].…”

“…8(d)-A curve that Cu 2p 3/2 and Cu 2p 1/2 core-level spectrum are asymmetric and can also be fitted to symmetrical peaks by Gaussian rule. The peaks at 932.4 and 951.9 eV correspond to the binding energy of Cu 2p 3/2 and Cu 2p 1/2 of Cu 2 O [38][39][40][41], and that at 934.3, 942.0 and 953.7 eV are attributed to CuO main peak [39,41], respectively. The peak at 942.0 eV is considered to be a satellite peak of CuO, which can confirm the presence of CuO [41,42].…”

Design and understanding of superhydrophobic ZnO nanorod arrays with controllable water adhesion

“…2(b) shows the corresponding XPS data. Especially, the characteristic peaks of Cu 2p 3/2 and Cu 2p 1/2 centered at 932.4 and 952.3 eV corresponding to the Cu + double peaks as well as shake-up satellite peaks confirm the formation of Cu 2 O [21,22]. To be noted, although the scanning XRD and XPS data indicate the existence of Cu 2 O at the sample surface, these data cannot tell us the detailed positions Cu 2 O located at.…”