Solvent-free synthesis of Cu-Cu2O nanocomposites via green thermal decomposition route using novel precursor and investigation of its photocatalytic activity

A Cu2O–CuSCN Nanocomposite as a Hole-Transport Material of Perovskite Solar Cells for Enhanced Carrier Transport and Suppressed Interfacial Degradation

“…The optical band gaps were measured for different hole-transport materials, as shown in Figure (a). In the case of the nanocomposite material, the band gap is ∼2.2 eV, which deviates from that of Cu 2 O (∼2.1 eV), possibly due to a structural disorder or changed bonding nature caused by the coexistence of O and S components. , Figure (b,c) shows the electronic structure of individual and nanocomposite materials. As illustrated, the work functions and valance-band maxima (VBM) of the nanocomposite and CuSCN are similar, due to the effective nanometer-scale depth of ultraviolet photoelectron spectroscopy (UPS). , On the other hand, Cu 2 O shows a more n -type behavior than CuSCN with a higher work function, thereby transporting holes from OHP to CuSCN more efficiently.…”

“…In the case of the nanocomposite material, the band gap is ∼2.2 eV, which deviates from that of Cu 2 O (∼2.1 eV), possibly due to a structural disorder or changed bonding nature caused by the coexistence of O and S components. 49,50 Figure 2(b,c) shows the electronic structure of individual and nanocomposite materials. As illustrated, the work functions and valance-band maxima (VBM) of the nanocomposite and CuSCN are similar, due to the effective nanometer-scale depth of ultraviolet photoelectron spectroscopy (UPS).…”

Role of surface reconstruction on Cu/TiO2 nanotubes for CO2 conversion

“…In the top panels of Figure 4, the as-synthesized catalysts were heated to 300 °C under continuous flow of Ar, and the initial spectra were acquired. The gas was switched to H 2 (20 ml/min), and their absorption edges red shifted over 10 minutes due to the reduction of Cu and the TiNT support [47,48]. The characteristic absorption band for metallic Cu nanoparticles, at around 600 nm [49], is discernible for the 1.5Cu/TiNT, 3Cu/TiNT and 6Cu/TiNT samples, but is not for 0.3Cu/TiNT.…”

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

“…6 Unfortunately, a high combination of electrons and holes is observed due to the presence of random defects in pure Cu 2 O, which will severely limit the photocatalytic process. 7 Therefore, the design and development of Cu 2 O-related photocatalysts with high charge separation and photocatalytic activity are still essential challenges.…”