Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 269, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118844
Keywords
Step-scheme; Ni2P; SnNb2O6; CdS-diethylenetriamine; Photocatalytic hydrogen production
Funding
- Distinguished Young Scholar of Anhui Province [1808085J14]
- NSFC [51572103, 51973078]
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Step-scheme (S-scheme) photocatalytic system has been considered as an effective method for solar energy conversion by utilizing broadband solar energy, realizing easy separation of photoexcited carriers and strong redox ability. Herein, the novel ternary Ni2P cocatalysted two-dimensional (2D)/2D SnNb2O6/CdS-diethylenetriamine (SNO/CdS-D) system was designed and fabricated. The S-scheme SNO/CdS-D heterostructure gives photocatalytic hydrogen production of 7808 mu mol g h(-1), which is about 130.13 and 2.35 times stronger than that of SNO and CdS-D. Further, noble-metal-free Ni2P cocatalyst is decorated into SNO/CdS-D heterostructure, the photocatalytic hydrogen evolution performance could be enhanced to 11,992 mu mol g(-1)h(-1). Additionally, XPS analysis and DFT calculation revealed the carriers moves from CdS-D to SNO and then to Ni2P in the Ni2P-SNO/CdS-D nanocomposite. This work will give a reliable and clear insight into the interface and surface design of the 2D catalysts and offer a broadband photocatalytic hydrogen evolution process without noble metal co-catalysts.
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