Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 2, Pages 535-541Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta04951a
Keywords
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Funding
- National Basic Research Program of China [2012CB933301]
- Key Project of National High Technology Research of China [2011AA050526]
- Ministry of Education of China [IRT1148]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- National Natural Science Foundation of China [51172110, 51372119, 61377019]
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A dense array of CdS-ZnS core-shell nanorods film (1D vertically aligned) was synthesized through a simple two-step aerosol assisted chemical vapor deposition (AACVD) method. In this configuration, a ZnS nanocrystal (protective shell) was grown in situ on a CdS core, forming nanorod heterostructures to restrain the photo-corrosion and enhance the charge separation and transportation efficiencies of CdS cores. The as-prepared CdS-ZnS films showed elevated photoelectrochemical (PEC) performance (over four times than that of uncoated CdS arrays) with a significant photocurrent density of 7.8 mA cm(-2) (0 V, vs. SCE) and incident photon to electron conversion efficiency (IPCE) values above 35% under AM 1.5G irradiation. Moreover, the stability of the photoelectrode was tested for over 16 min. These results suggest that the dense array of CdS-ZnS core-shell heterostructures provides a unique spatial distribution of the photo-excited charge carriers, as well as stable anti-photo-corrosion ability, and therefore is promising to be a photoelectrode in PEC hydrogen generation from water.
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