Nitrogen-doped graphene-ferronickel hydrotalcite difunctional oxygen catalyst and preparation method and application thereof
A nitrogen-doped graphene and oxygen catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of easy purchase and preparation, increased specific surface area, and improved stability
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[0033] Example 1:
[0034] (a) Preparation of GO / LDH complex
[0035] Disperse a certain amount of GO in ethylene glycol to a concentration of 1.0 mg / mL, disperse ultrasonically for 1 hour, and centrifuge at 3000 rpm for 10 minutes to remove unstripped GO to obtain a stripped GO dispersion. Take 20 mL of the dispersion and press 3: Add nickel chloride hexahydrate and ferric chloride hexahydrate to it at a molar ratio of 1, so that the total concentration of metal ions is 0.04 mol / L, stir to completely dissolve it, and then slowly add 0.6 g of sodium dodecyl sulfonate and stir Dissolve it under the conditions and drop it into 10mL ethylene glycol solution containing 0.16g NaOH at a constant speed. Transfer the mixture into the reactor and react at 160℃ for 24h. After centrifugal separation, the reaction solution is washed with deionized water and ethanol three times. , It becomes GO / LDH compound after drying;
[0036] (b)C 3 N 4 Preparation of nanosheets
[0037] Calcining 0.5 g of m...
Example Embodiment
[0040] Example 2:
[0041] (a) Preparation of GO / LDH complex
[0042] Prepare according to the method and conditions of step (a) in Example 1;
[0043] (b)C 3 N 4 Preparation of nanosheets
[0044] Prepare according to the method and conditions of step (b) in Example 1;
[0045] (c) Preparation of NG / LDH oxygen catalyst
[0046] Disperse the GO / LDH complex obtained in step (a) in an aqueous solution to a concentration of 2mg / ml, pipette 50ml of this solution, and add 30mL of 0.75mg / mL dropwise to the solution at a uniform rate under stirring C 3 N 4 The nanosheet aqueous solution was mixed and transferred to a reaction kettle, and reacted at 180°C for 20 hours. The obtained solid sample was centrifuged and washed with deionized water and ethanol for three times, and then dried to obtain a bifunctional oxygen catalyst NG / LDH. The average particle size is 296nm and the specific surface area is 186.51m 2 / g.
Example Embodiment
[0047] Example 3:
[0048] (a) Preparation of GO / LDH complex
[0049] Prepare according to the method and conditions of step (a) in Example 1;
[0050] (b)C 3 N 4 Preparation of nanosheets
[0051] Prepare according to the method and conditions of step (b) in Example 1;
[0052] (c) Preparation of NG / LDH oxygen catalyst
[0053] Disperse the GO / LDH complex obtained in step (a) in an aqueous solution to a concentration of 2mg / ml, pipette 50ml of this solution, and add 30mL of 0.50mg / mL dropwise to the solution at a constant rate under stirring C 3 N 4 The nanosheet aqueous solution was mixed and transferred to a reaction kettle, and reacted at 180°C for 20 hours. The obtained solid sample was centrifuged and washed with deionized water and ethanol for three times, and then dried to obtain a bifunctional oxygen catalyst NG / LDH. The average particle size is 318nm and the specific surface area is 208.63m 2 / g.
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