Non-noble metallic Cu with three different roles in a Cu doped ZnO/Cu/g-C₃N₄ heterostructure for enhanced Z-scheme photocatalytic activity

Abstract

Doping, co-catalyst, and Z-scheme configuration are three potential approaches to enhance the photocatalytic activity of metal oxides. Cu doped ZnO/Cu/g-C3N4 heterostructure is prepared using the calcination-hydrothermal method. The successful fabrication...

Highly efficient visible light active Cu–ZnO/S-g-C3N4 nanocomposites for efficient photocatalytic degradation of organic pollutants

“… 58,63 In addition, the photocatalytic efficiency of the CZS-25 NC is practically higher compared to the previously reported studies, as presented in Table 5 . 64–70 Hence, the CZS-25 NC is the most effective composite for the photocatalytic dye degradation and was further employed for the recycling study.…”

A Cu medium designed Z-scheme ZnO–Cu–CdS heterojunction photocatalyst for stable and excellent H2 evolution, methylene blue degradation, and CO2 reduction

“…01-085-1326). 27 In the ZnO 0.45 Cu 0.1 CdS 0.45 catalyst, the diffraction peaks of all three components are observed, indicating that all three species preserved their original crystal structures in the composite. However, the corresponding intensity of the diffraction peaks was higher than those of ZnO and CdS.…”

“…25,26 Moreover, the addition of plasmonic metals can boost up the light-absorption response due to the typical SPR effect. 27 Among different precious metals, Cu is a highly effective precious metal because it tends to increase light absorption due to its SPR effect, lower cost, relatively small interband transition threshold (Cu 2.1 eV < Au 2.8 eV < Ag 3.8 eV ), and longer wavelength LSPR harvesting in the visible region. 28 Because of the above design, the photoexcited e − and h + possessing lower redox potentials in two different semiconductors can transfer to the Cu-bridge to decompose each other and experience their prompt split-up while reserving their powerful redox capabilities.…”

Construction of 3D flowers-like O-doped g-C3N4-[N-doped Nb2O5/C] heterostructure with direct S-scheme charge transport and highly improved visible-light-driven photocatalytic efficiency

“…As in the case of oxygen and nitrogen, which have a negative partial charge, the electronegative atom must have one or more unshared electron pairs. Hydrogen's efforts with such a partial positive charge are to find another oxygen or nitrogen atom with additional electrons to exchange and they are drawn-linked to the partial negative charge, resulting in the construction of multiple H-bonds [61][62][63].…”

“…In this case, the intermediate products' (m/z) outcomes are determined to be 415, 387, 359, 301.3, and 259.3, respectively. In general, N-de-ethylation, de-carboxylation, chromophore cleavage, ring-opening, and mineralization are all common processes in the photocatalytic degradation mechanism of RhB dye [63,76,77]. RhB is usually found as a de-ethylated product that has been totally mineralized.…”