期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 119, 期 35, 页码 20555-20560出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b07370
关键词
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资金
- National Natural Science Foundation of China [51236007, 51323011]
- China Postdoctoral Science Foundation [2014M560769]
- China Fundamental Research Funds for the Central Universities
Controlling the shape or morphology of semiconductor nanocrystals is central to their enhanced physical and chemical properties. Herein, using CdS as a model photo catalyst, we demonstrate that the crystal habit of a visible-light-active semiconductor can be quantitatively controlled through synthesis kinetics. Growth rate control of {0001} facets (r(1)) and {10 (1) over bar1} facets (r(1')) of CdS nanocrystals was achieved by simply employing a syringe pump, which enables us to finely tune the crystal shape from nanocones, to nanofrustums, and further to nanoplates. These shape-controlled samples, showing altered proportions of {0001} to {10 (1) over bar1} facets, were used to investigate the crystal-facet dependence of solar hydrogen production. The results indicate that CdS nanoplates with the largest {0001} facets showed the highest photocatalytic activity. This work not only advances our knowledge on the growth mechanism of semiconductor crystals but also illustrates a robust method to targeted crystal design of semiconductors toward optimizing their associated catalytic activities.
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