Convenient architectures of Cu₂O/SnO₂ type II p–n heterojunctions and their application in visible light catalytic degradation of rhodamine B

Abstract

Enhanced photocatalytic performance of a coupled p-type Cu2O/n-type SnO2 nanocomposite primarily attributed to the hierarchical architecture and heterojunction formation.

Facile assembly and improved photocatalytic activity of a special cuprous oxide/copper fluoride heterojunction induced by graphene oxide

“…5B), the binding energies at 932.7 eV and 952.6 eV are found to correspond to Cu 2p 3/2 and Cu 2p 1/2 of Cu + , respectively, indicating the presence of Cu + in the composite. 29 It is consistent with the characterizations of TEM image and XRD pattern. In addition, the shake-up peaks at 935.0 eV, 942.6 eV and 955.0 eV, and the satellite peaks at 944.4 and 962.9 eV attributed to the characteristic peaks of Cu 2+ are observed, 30 indicating that a small amount of CuO is present in the nanocomposite.…”

Straddled Band Aligned CuO/BaTiO3 Heterostructures: Role of Energetics at Nanointerface in Improving Photocatalytic and CO2 Sensing Performance

“…Moreover, the subsistence of two shakeup satellite peaks, which is characteristic feature evincing the partially filled d-orbital (3d 9 in the case of Cu 2+ ), further confirms presence of Cu 2+ . 13,14,19 High resolution Ag 3d core level scan displays peaks at 368 (3d 5/2 ) and 374 eV (3d 3/2 ) with spin−orbitals set apart by 6 eV, reiterating the zerovalent nature of Ag (Figure S4d). Diffuse reflectance spectra of CuO, BaTiO 3 , and CuO/ BaTiO 3 heterostructures in varying ratios are displayed in Figure 5b.…”

“…The rate constant for first-order reaction (κ) for each sample was determined from the slope of the plot illustrating ln (C 0 /C) versus irradiation time profile. Photodegradation constant and rate constant for first-order reaction for various catalysts was estimated according to our previous work, 19 and is illustrated in Figure 7c. The rate constants for first-order reaction (κ) value for pristine CuO and BaTiO 3 were observed to be 7.5 × 10 −5 and 7.8 × 10 −3 min −1 with precision of 3.51 × 10 −6 and 4.32 × 10 −4 , respectively, and for CuO/BaTiO 3 lie within the range of 1.232−7.895 × 10 −2 min −1 .…”

Effect of SnO Composition in SnO/SnO2 Nanocomposites on the Photocatalytic Degradation of Malachite Green under Visible Light

“…Based on this, the heterojunctions of Cu 2 O/TiO 2 , [17] Cu 2 O/ SnO 2 , [18] CuO/SnO 2 , [19] NiO/SnO 2 , [20] CuBi 2 O 4 /SnO 2 , [21] CaFe 3 O 4 / Ag 3 VO 4 , [22] SnO/SnO 2 [23,24,25] were fabricated to enhance the photocatalytic degradation of enviromentally-polluted organic dyes under ultraviolet-visible illumination. In addition, due to difference of work functions of metal oxide semiconductors, we can produce n-n or p-p junctions which present highly-efficient separation of photogenerated carriers.…”