Abstract
Our work focuses on the preparation of nanocrystalline Ag2O (n-Ag2O) by mechanochemical decomposition (MCD) of a paramagnetic compound of an empirical formula Ag7O8NO3. Electrochemically prepared millimetre-long needles of Ag7O8NO3 were high-energy ball milled (HEM) for1 min, 3 min and 5 min. A gradual decomposition of Ag7O8NO3 to n-Ag2O and AgNO3 was observed. Ag2O nanocrystals form in an aggregated and spherical morphology with crystallite sizes ranging from ∼10 – 30 nm. n-Ag2O displayed weak ferromagnetism with the saturation magnetisation of 5×10–3emu/g. The MCD of Ag7O8NO3 can be estimated as follows: 2Ag7O8NO3 → 6Ag2O + 2AgNO3 + 5O2.
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