Grinding Ag2O with other chemicals in the glove box at room temperature. Since Ag2O is photosensitive, would it decompose at room temperature?
Dear Sir. Concerning your issue about the decomposition of Ag2O at room temperature in the presence of light . At room temperature Ag2O will not decomposed but the thermal decomposition of AgO is a complicated process. AgO decomposes initially to form a solid solution of Ag2O3 and Ag2O which then slowly decomposes into Ag2O. The main decomposition steps are an initial decomposition of AgO to Ag2O (150– 180 °C), then a slow continuing decomposition of AgO to Ag2O (180– 280 °C),and finally a rapid decomposition of Ag2O to metallic Ag . Pure Ag2O transferred to a mixture of Ag2O and AgO, then to pure AgO, as the oxygen flow ratio was increased. After annealing, the reduction of AgO into Ag2O and decomposition of Ag2O into Ag and O2 took place, and the decomposed Ag elements would diffuse outward and precipitate small silver particles on the surface. I think the following below links may help you in your analysis:
https://ir.nctu.edu.tw/bitstream/11536/27648/1/000184400400106.pdf
http://web.nchu.edu.tw/pweb/users/ycho22081/research/5060.pdf
Thanks
Moisture should be avoided, since it would render the crystalline Ag2O powder rather sensitive to daylight, so that the former (presumably) dry brown powder would be expected to darken. You may dry this powder in vacuum by 80 ºC.
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