Synthetic method for dodecahedral and tetrakaidecahedral alpha-Fe2O3 microcrystals
A technology of tetradecahedron and dodecahedron, which is applied in the field of preparation of polyhedral ferric oxide micro-nano materials
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Embodiment 1
[0022] Dissolve 0.884 grams of potassium ferrocyanide in 40 mL of deionized water, add 20 mL of sodium hypochlorite solution (use analytically pure sodium hypochlorite solution, available chlorine 10%, solution concentration 21%, the same below), stir well and add 0.07 grams of sodium hydroxide Solid, after dissolving, the reaction solution is transferred to a stainless steel reaction kettle with 50mL polytetrafluoroethylene lining, and the filling degree is 80% (not all adornment, only 80% of the reaction kettle has been filled, and the remaining solution is discarded. However, if you use other types of reactors, such as 100mL or 30mL reactors, the experimental results will not be obtained) Put the reactor in an oven at 180°C for 24 hours at a constant temperature. After natural cooling and centrifugation, the resulting solid was washed three times with deionized water and absolute ethanol, and the solid sample was collected and dried in an oven at 60°C for 12 hours to obtain ...
Embodiment 2
[0024] Dissolve 0.884 grams of potassium ferrocyanide in 40 mL of deionized water, add 20 mL of sodium hypochlorite solution, stir evenly, add 0.1 g of sodium hydroxide solid, and transfer the reaction solution into a 50 mL polytetrafluoroethylene-lined stainless steel reactor , the filling degree was 80% (the remaining solution was discarded), and the reaction kettle was placed in an oven at 180° C. for 24 hours at a constant temperature. After natural cooling and centrifugation, the resulting solid was washed three times with deionized water and absolute ethanol, and the solid sample was collected and dried in an oven at 60°C for 12 hours to obtain a truncated dodecahedral α-Fe 2 o 3 .
Embodiment 3
[0026] Dissolve 0.884 grams of potassium ferrocyanide in 40 mL of deionized water, add 20 mL of sodium hypochlorite solution, stir evenly, add 0.3 grams of sodium hydroxide solid, and transfer the reaction solution into a 50 mL polytetrafluoroethylene-lined stainless steel reactor , the filling degree was 80% (the remaining solution was discarded), and the reaction kettle was placed in an oven at 180° C. for 24 hours at a constant temperature. After natural cooling and centrifugation, the resulting solid was washed three times with deionized water and absolute ethanol, and the solid sample was collected and dried in an oven at 60°C for 12 hours to obtain tetradecahedral α-Fe 2 o 3 .
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