期刊
NANOMATERIALS
卷 3, 期 3, 页码 317-324出版社
MDPI AG
DOI: 10.3390/nano3030317
关键词
solid-state synthesis; metathesis; nanoparticles; X-ray diffraction; vibrational spectroscopy
类别
资金
- Natural Science and Engineering Resource Council (Canada)
- Petroleum Research Atlantic Canada
- Canada Foundation for Innovation (New Opportunities)
We demonstrate a simple strategy to either prevent or enhance hydroxide incorporation in nanocrystalline solid-state metathesis reaction products prepared in ambient environments. As an example, we show that ZnCO3 (smithsonite) or Zn-5(CO3)(2)(OH)(6) (hydrozincite) forms extremely rapidly, in less than two minutes, to form crystalline domains of 11 +/- 2 nm and 6 +/- 2 nm, respectively. The phase selectivity between these nanocrystalline products is dominated by the alkalinity of the hydrated precursor salts, which may in turn affect the availability of carbon dioxide during the reaction. Thus, unlike traditional aqueous precipitation reactions, our solid-state method offers a way to produce hydroxide-free, nanocrystalline products without active pH control.
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