An ultrathin Al₂O₃ bridging layer between CdS and ZnO boosts photocatalytic hydrogen production

Abstract

An ultrathin Al2O3 bridging layer is intentionally introduced into the interface between CdS and ZnO by using an atomic layer deposition method, and the resultant CdS@Al2O3@ZnO catalyst exhibits a significantly enhanced H2 evolution rate.

Ultrathin 2D/2D ZnIn2S4/g‐C3N4 Nanosheet Heterojunction with Atomic‐Level Intimate Interface for Photocatalytic Hydrogen Evolution under Visible Light

“…[6][7][8][9] According to the research of titanium dioxide (TiO 2 ) single crystal in photoelectrochemistry, Fujishima and Honda [10] pioneered the field of semiconductor photocatalysis. However, the wide band gap of metal oxide such as ZnO, [11][12][13][14] SnO 2 , [15][16][17][18] Nb 2 O 5 , [19][20][21] etc., makes them only respond to near-ultraviolet or ultraviolet light, resulting in low efficiency of solar energy. In fact, visible light accounts for 43% of sunlight, while ultraviolet ray accounts for merely 4%.…”

Y2O3:Yb3+, Tm3+/ZnO composite with a heterojunction structure and upconversion function for the photocatalytic degradation of organic dyes

“…A potential difference will be generated between the two sides of this heterostructure, facilitating the separation of photogenerated electron–hole pairs and improving the separation efficiency, thereby enhancing the catalytic activity. 40–45 …”

“…A potential difference will be generated between the two sides of this heterostructure, facilitating the separation of photogenerated electron-hole pairs and improving the separation efficiency, thereby enhancing the catalytic activity. [40][41][42][43][44][45] 3.3 Surface structure analysis XPS was used to further characterize the elements contained in the UCNPs and their valences. All peaks were calibrated using carbon C-C/C-H binding energy of 284.8 eV in the C1s adsorption spectrum.…”

LaFeO3 meets nitrogen-doped graphene functionalized with ultralow Pt loading in an impactful Z-scheme platform for photocatalytic hydrogen evolution

“…Thus, direct Z-scheme photocatalyst systems offer better light-induced charge carrier transfer and separation, and hence photocatalytic performance, than their counterparts. [13][14][15] In this regard, LaFeO 3 , one of the most commonly used perovskite oxides, 16,17 is considered as a suitable PS II entity for direct Z-scheme hydrogen evolution systems owing to its low positive CB potential of 0.2 V (vs. NHE), 18 which limits the generation of hydrogen. Perovskite LaFeO 3 has great potential for application in the eld of photocatalysis owing to its lowcost production, high stability, non-toxicity, and low bandgap energy (2.4 eV).…”