Calcium vanadate microsphere material and preparation method and application thereof
A technology of micro-spheres and calcium vanadate, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., to achieve the effects of suitable mass production, mild reaction conditions, and rich materials.
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Embodiment 1
[0027] At room temperature, 2 mmol of sodium orthovanadate was dissolved in 10 mL of distilled water, and 1 mmol of CaCl 2 Dissolved in 8mL distilled water, under magnetic stirring, the sodium orthovanadate solution was added dropwise to the CaCl 2 solution, stirred for 10min, with 1mol / L HNO 3 The solution adjusts the pH value of the reaction system to 10, continues to stir for 10 minutes, then transfers it into a 25mL hydrothermal reaction kettle, seals it, and places it in a constant temperature box for 12 hours of hydrothermal reaction at 180°C. After the reaction is completed, cool it to room temperature, and use Deionized water and absolute ethanol were centrifuged and washed 5 times, and the resulting precipitate was dried in an oven at 80°C for 8 hours to obtain Ca 2 V 2 o 7 microsphere material. The above product was subjected to X-ray diffraction (XRD) analysis, figure 1 It is an XRD spectrum, and the result shows that the product diffraction peak is related to ...
Embodiment 2
[0029] At room temperature, 2 mmol of sodium orthovanadate was dissolved in 7 mL of distilled water, and 1 mmol of CaCl 2 Dissolve in 9mL distilled water, and add sodium orthovanadate solution dropwise to CaCl under magnetic stirring 2 solution, stirred for 10min, with 1mol / L HNO 3 The solution adjusts the pH value of the reaction system to 9 and continues to stir for 10 minutes, then transfers it into a 20mL hydrothermal reaction kettle, seals it, and places it in a constant temperature box for 6 hours of hydrothermal reaction at 160°C. After the reaction is completed, cool it to room temperature, and use After deionized water and absolute ethanol were centrifuged and washed 5 times, they were dried in an oven at 80°C for 12 hours to obtain Ca 2 V 2 o 7 microsphere material. XRD spectrum ( image 3 ) results show that the product diffraction peaks are closely related to Ca 2 V 2 o 7 match. SEM analysis was performed at a higher magnification ( Figure 4 ) indicates ...
Embodiment 3
[0031] At room temperature, 1 mmol of sodium orthovanadate was dissolved in 7 mL of distilled water, and 1 mmol of CaCl 2 Dissolved in 7mL distilled water, under magnetic stirring, the sodium orthovanadate solution was added dropwise to the CaCl 2 solution, stirred for 10min, with 1mol / L HNO 3 The solution adjusts the pH value of the reaction system to 10 and continues to stir for 10 minutes, then transfers it to a 20mL hydrothermal reaction kettle, seals it, and places it in a constant temperature box for hydrothermal reaction at 160°C for 48 hours. After the reaction is completed, cool it to room temperature. The resulting precipitate was washed 6 times with deionized water and then washed 5 times with absolute ethanol, and then placed in an oven at 80°C for 8 h in vacuum to obtain Ca 2 V 2 o 7 microsphere material. SEM analysis ( Figure 5 ) indicates that the diameter of the microsphere is 0.5-1.0μm, and the surface of each microsphere is constructed by smaller partic...
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Abstract
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