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At oxidizing of liquid zinc by H2O/CO2 mixture at supercritical parameters it is found the formation of nanoparticles (ZnO)n with size from 1.5 to 100 nm and combustible substances: H2, CO, lower paraffin and aromatic hydrocarbons, alcohols and formaldehyde. Composition of combustible products depends on H2O/CO2 ratio in mixture. Synthesized ZnO samples were studied by methods of scanning and transmission...
The synthesis of nanoparticles (ZnO)n was found out at study of liquid zinc (Zn)L oxidizing by supercritical CO2. This process called as chemical recondensation (CR). It was determined that depending on CR conditions the nanoparticles with size of 5-50 nm and the nanoneedles with diameter of 25.100 nm, length of up to 50 mum are synthesized. For CR of (Zn)L in CO2 the cluster mechanism is suggested...
Bulk solid (Zn)S and liquid zinc (Zn)L samples are oxidized by water with the formation of nanodimensional ZnO. The rate of this process, called chemical recondensation (CR) by water, increases with temperature and water density rise. The CR process begins with the formation of (ZnO)n clusters via the reaction (Zn)S,L + nH2O = [(Zn)S,Lmiddot(ZnO)n] + nH2, followed by their growth at n > 4. The...
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