Journal
NANOSCALE
Volume 4, Issue 6, Pages 2010-2017Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nr12045c
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Funding
- National Natural Science Foundation of China [20871036, 21071036]
- Province Natural Science Foundation of Heilongjiang Province [ZD201011]
- Harbin Institute of Technology [HITQNJS. 2009. 001]
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ZnS and CdS nanocrystals with a size of 5-10 nm embedded in CdS/ZnS/In2S3 microspheres have been successfully synthesized by a sonochemistry method at room temperature and normal pressure without the use of templates or surfactants. The as-prepared products have been characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), EDX line spectrum, high-angle annular dark-field imaging (HAADF), UV-visible diffuse reflectance spectra (UV-vis) and photoluminescence (PL) spectra. The reaction process in the solution under ultrasonic irradiation was investigated by gas chromatography-mass spectrometry (GC-MS). The mechanisms of phase formation and morphology control of CdS/ZnS/In2S3 microspheres are proposed and discussed in detail. Furthermore, the photocatalytic activity of CdS/ZnS/In2S3 for water splitting was investigated under visible-light irradiation (lambda > 400 nm) and an especially high photocatalytic activity (apparent yield is 40.9% at 420 nm) was achieved in the absence of co-catalysts.
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