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Updated: Aug 3, 2025

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
Published on: October 23, 2018
S-Scheme and Schottky Junction Synchronous Regulation Boost Hierarchical CdS@Nb2O5/Nb2CT (MXene) Heterojunction for
Yiming Chen1, Zirong Wang1, Yue Zhang1
1School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China.
Abstract:
Photocatalytic water cracking hydrogen (H2) production is a promising clean energy production technology. Therefore, a ternary CdS@Nb2O5/Nb2CT (MXene) heterojunction with hierarchical structure was designed to promote photocatalytic H2 evolution. When Na2S/Na2SO3 and lactic acid were used as sacrificial agents, the hydrogen evolution reaction (HER) rates of the optimized photocatalyst were 1501.7 and 2715.8 μmol g-1 h-1, with 12.4% and 26.1% apparent quantum efficiencies (AQE) at 420 nm, respectively. Its HER performance was 10.9-fold higher than that of pure CdS and remained 87% activity after five rounds of cycle tests. Such an enhancement stems from the excellent light absorption properties, tight interfacial contact, fast charge transfer channel, and sufficient active sites. Mechanism analysis demonstrates that S-scheme and Schottky junction synchronous regulation boost hierarchical CdS@Nb2O5/Nb2CT for photocatalytic H2 production. This work creates possibilities for manufacturing Nb-based MXene photocatalysts for converting solar energy and other applications.
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