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lzk5555

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Waldo J. E. Beek, Martijn M. Wienk, Martijn Kemerink. Hybrid zinc oxide conjugated polymer bulk heterojunction solar cells. J. Phys. Chem. B, 2005, 109: 9505-9516
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ZnO Nanoparticles Synthesis£ºzinc acetate dihydrate (Acros,98%, 2.95 g, 13.4 mmol) was dissolved in methanol (125 mL)at 60 ¡ãC, a solution of KOH (Merck, 87%, 1.48 g, 23 mmol) inmethanol (65 mL) was added in 10 min to the zinc acetate dihydrate solution under vigorous stirring. Zinc hydroxides precipitated but dissolved again. After 5 min, the solution became translucent and remained translucent. After 1.5 h, the nanoparticles started to precipitate and the solution became turbid. After 2 h and 15 min, the heater and stirrer were removed
and the nanoparticles were allowed to precipitate for an additional 2 h. Precipitate and mother liquor were separated, and the precipitate was washed twice with methanol (50 mL). After the washing steps (5 min), the suspension was left unstirred for a minimum of1hto reach full precipitation. The washed precipitate was treated with chloroform or chlorobenzene (10mL) to dissolve the nanoparticles. This solution was only slightly translucent, almost transparent, and was stable for more than two weeks. The amount of methanol in the resulting solution
was determined with 1H NMR. Replacing the last washing step with a centrifugation step (4300 rpm, 5 min) decreased the amount of methanol with a factor 2.

[ Last edited by sddtc888 on 2013-8-8 at 23:04 ]
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