S-Scheme and Schottky Junction Synchronous Regulation Boost Hierarchical CdS@Nb2O5/Nb2CTx (MXene) Heterojunction for Photocatalytic H2 Production
Source abstract
Abstract
Photocatalytic water cracking hydrogen (H 2 ) production is a promising clean energy production technology. Therefore, a ternary CdS@Nb 2 O 5 /Nb 2 C T x (MXene) heterojunction with hierarchical structure was designed to promote photocatalytic H 2 evolution. When Na 2 S/Na 2 SO 3 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@Nb 2 O 5 /Nb 2 C T x for photocatalytic H 2 production. This work creates possibilities for manufacturing Nb-based MXene photocatalysts for converting solar energy and other applications.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: MXene and MAX Phase Materials · Advanced Photocatalysis Techniques · 2D Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, P. R. China
School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
Funding
Bureau of Science and Technology of Jiangmen Municipality · Guangdong Key Laboratory of Fuel Cell Technology · Department of Education of Guangdong Province · Wuyi University · National Natural Science Foundation of China · Guangdong Basic and Applied Basic Research Foundation · Guangdong Provincial Key Lab of Green Chemical Product Technology
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