http://scholars.ntou.edu.tw/handle/123456789/2258
Title: | Microstructure-Dependent Visible-Light Driven Photoactivity of Sputtering-Assisted Synthesis of Sulfide-Based Visible-Light Sensitizer onto ZnO Nanorods | Authors: | Liang, Yuan-Chang Chung, Cheng-Chia Lo, Ya-Ju Wang, Chein-Chung |
Keywords: | sputtering;microstructures;heterostructure;photoactivity | Issue Date: | Dec-2016 | Publisher: | MDPI AG | Journal Volume: | 9 | Journal Issue: | 12 | Source: | MATERIALS | Abstract: | The ZnO-CdS core-shell composite nanorods with CdS shell layer thicknesses of 5 and 20 nm were synthesized by combining the hydrothermal growth of ZnO nanorods with the sputtering thin-film deposition of CdS crystallites. The microstructures and optical properties of the ZnO-CdS nanorods were associated with the CdS shell layer thickness. A thicker CdS shell layer resulted in a rougher surface morphology, more crystal defects, and a broader optical absorbance edge in the ZnO-CdS rods. The ZnO-CdS (20 nm) nanorods thus engaged in more photoactivity in this study. When they were further subjected to a postannealing procedure in ambient Ar/H-2, this resulted in the layer-like CdS shell layers being converted into the serrated CdS shell layers. By contrast, the ZnO-CdS nanorods conducted with the postannealing procedure exhibited superior photoactivity and photoelectrochemical performance; the substantial changes in the microstructures and optical properties of the composite nanorods following postannealing in this study might account for the observed results. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/2258 | ISSN: | 1996-1944 | DOI: | 10.3390/ma9121014 |
Appears in Collections: | 光電與材料科技學系 07 AFFORDABLE & CLEAN ENERGY |
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