Method for preparing ferriferrous oxide nano powder by means of carbon thermal reduction
A technology of ferric tetroxide and nano-powder, applied in the directions of iron oxide/iron hydroxide, ferrous oxide, etc., can solve the problems of long production cycle, high equipment requirements and high cost, and achieve low production cost, High product purity and good reproducibility
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Embodiment 1
[0026] Add an equal volume and equal molar concentration of citric acid solution to the 10mol / L ferric nitrate solution, and use magnetic stirring to fully stir and mix for 8 hours at a water bath temperature of 60°C, then adjust the pH value to 7.0 with pure ammonia water, and continue stirring at a constant temperature After 4 hours, transfer to a drying oven at 100°C to evaporate until a xerogel is formed, and ignite the xerogel in the air to obtain α-Fe 2 o 3 Nano-powder, the obtained powder is carried out phase analysis with X-ray diffractometer, and the diffraction pattern is as follows figure 1 .
[0027] Weigh the appropriate amount of sucrose and α-Fe 2 o 3 Nanopowder in which sucrose and α-Fe 2 o 3 The molar ratio of the nano powder is 1:48, add the same quality of deionized water, stir and mix until the mixture is evenly mixed and presents a wet soil shape, age the mixture in the air for 8 hours, dry it in a drying oven at 90°C and put it in In the tube furnac...
Embodiment 2
[0029] Add an equal volume and equal molar concentration of citric acid solution to the 8mol / L ferric nitrate solution, and use magnetic stirring to fully stir and mix for 6 hours at a water bath temperature of 50°C, then adjust the pH value to 6.0 with pure ammonia water, and continue to stir at a constant temperature 5h. Then transfer to a drying oven at 110°C to evaporate until a dry gel is formed, and ignite the gel in the air to obtain α-Fe 2 o 3 Nano powder.
[0030] Weigh the appropriate amount of lactose and α-Fe 2 o 3 Nanopowder with lactose and α-Fe 2 o 3 The molar ratio of the nano powder is 1:36, add the same quality of deionized water, stir and mix until the mixture is evenly mixed and presents a wet soil shape, age the mixture in the air for 12 hours, dry it in a drying oven at 100°C and put it in In the tube furnace, use a vacuum pump to evacuate the tube furnace to a vacuum degree of 10 -3 Pa, and then feed the inert gas into the tube furnace to an atmos...
Embodiment 3
[0032] Add an equal volume and equal molar concentration of citric acid solution to the 6mol / L ferric nitrate solution, and use magnetic stirring to fully stir and mix for 5 hours at a water bath temperature of 40°C, then adjust the pH value to 5.0 with pure ammonia water, and continue stirring at a constant temperature After 6 hours, transfer to a drying oven at 120°C to evaporate until a dry gel is formed, and ignite the gel in the air to obtain α-Fe 2 o 3 Nano powder.
[0033] Weigh an appropriate amount of maltose and α-Fe 2 o 3 Nano powder, in which maltose and α-Fe 2 o 3 The molar ratio of the nanometer powder is 1:20, add the same quality of deionized water, stir and mix until the mixture is evenly mixed and appears like wet soil, age the mixture in the air for 16 hours, dry it in a drying oven at 100°C and put it in In the tube furnace, use a vacuum pump to evacuate the tube furnace to a vacuum degree of 10 -3 Pa, and then feed the inert gas into the tube furnace t...
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