Method for controlling size of Birnessite type manganese dioxide nanoflower
A technology of manganese dioxide and nanoflowers, applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, etc., can solve the problems of uncontrollable size, narrow size range of manganese dioxide nanoflowers, etc., and achieve the effect of accelerating the reaction rate
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Embodiment 1
[0034] The three-necked flask was placed in a 90°C constant temperature water bath, and the KMnO 4 Solution (0.1mol / L, 100mL) was added into a three-necked flask and a magnetic stirrer was added, stirring continuously; then sodium oleate solution (0.05mol / L, 1.6mL) was added, mixed evenly, and H 2 SO 4 Solution (2mol / L, 10mL) continued to react until the solution was colorless, then the three-necked flask was taken out from the water bath and cooled to room temperature, and the resulting precipitate was washed with distilled water, washed with absolute ethanol, and dried in an oven. Grind into powder to obtain manganese dioxide nanoflowers, and the scanning electron microscope (SEM) morphology is as follows figure 1 As shown, the XRD spectrum is as Figure 7 As shown, the results show birnessite-type manganese dioxide as a pure phase.
Embodiment 2
[0036] The three-necked flask was placed in a 90°C constant temperature water bath, and the KMnO 4 Solution (0.1mol / L, 100mL) was added into a three-necked flask and a magnetic stirrer was added, stirring continuously; then sodium oleate solution (0.05mol / L, 2mL) was added, mixed evenly, and H 2 SO 4 Solution (2mol / L, 10mL) continued to react until the solution was colorless, then the three-necked flask was taken out from the water bath and cooled to room temperature, and the resulting precipitate was washed with distilled water, washed with absolute ethanol, and dried in an oven. Grind into powder to obtain manganese dioxide nanoflowers, and the scanning electron microscope (SEM) morphology is as follows figure 2 shown.
Embodiment 3
[0038] The three-necked flask was placed in a 90°C constant temperature water bath, and the KMnO 4 Solution (0.1mol / L, 100mL) was added into a three-necked flask and a magnetic stirrer was added, stirring continuously; then sodium oleate solution (0.05mol / L, 2.8mL) was added, mixed evenly, and H 2 SO 4 Solution (2mol / L, 10mL) continued to react until the solution was colorless, then the three-necked flask was taken out from the water bath and cooled to room temperature, and the resulting precipitate was washed with distilled water, washed with absolute ethanol, and dried in an oven. Grind into powder to obtain manganese dioxide nanoflowers, and the scanning electron microscope (SEM) morphology is as follows image 3 shown.
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