Sonochemistry synthesis and enhanced photocatalytic H-2-production activity of nanocrystals embedded in CdS/ZnS/In2S3 microspheres

作者：Shen, Zaoyu; Chen, Gang^*; Wang, Qun; Yu, Yaoguang; Zhou, Chao; Wang, Yu

来源：Nanoscale, 2012, 4(6): 2010-2017.

DOI：10.1039/c2nr12045c

• VISIBLE-LIGHT-DRIVEN
• SOLID-SOLUTION PHOTOCATALYSTS
• HYDROGEN-PRODUCTION
• H-2 EVOLUTION
• FACILE SYNTHESIS
• CDS
• WATER
• TIO2
• NANOPARTICLES
• COCATALYST

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.

• 出版日期2012
• 单位哈尔滨工业大学