A kind of preparation method of graphene supported metal oxide catalyst
A metal and graphene-loaded technology, applied in organic chemistry, chemical recycling, etc., can solve problems such as inability to effectively promote glucose isomerization and polysaccharide hydrolysis, lack of glucose active sites, and small specific surface area, so as to promote efficient degradation and conversion, Fast reaction rate and high catalytic activity
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[0013] The invention provides a kind of preparation method of graphene supported metal oxide catalyst, it is characterized in that comprising the following steps:
[0014] (1) Take 0.0004-0.0008mol of metal chloride, and use water as a solvent to prepare a solution 1 with a concentration of 0.33-0.66mol / L;
[0015] (2) Mix 0.1-0.3g of graphene and 80-120ml of 0.005-0.15mol / L alkali metal hydroxide solution, ultrasonic at room temperature for 1-2h; Wash the resulting solid with water to neutrality to obtain precipitate 1;
[0016] (3) Mix solution 1 and precipitate 1, and sonicate again for 1-2 hours, then stir for 22-26 hours, wash the obtained solid with deionized water, remove remaining reactants, and obtain precipitate 2;
[0017] (4) Mix the precipitate 2 with 80-120ml 0.005-0.15mol / L alkali metal hydroxide solution, sonicate for 1-2 hours, then stir for 22-26h; after stirring, condense at 60-80°C Reflux for 1-4h; wash the obtained solid with deionized water, remove the ...
Embodiment 1-5
[0025] The preparation method of graphene-supported metal oxide catalyst: (1) Weigh 0.0004mol of metal chloride, and use water as a solvent to prepare a solution 1 with a concentration of 0.33mol / L;
[0026] (2) Mix 0.1 g of graphene oxide and 90 ml of 0.01 mol / L NaOH solution, ultrasonicate at room temperature for 1 h, stir at room temperature for 23 h after the end of ultrasonication, and then wash the resulting solid with deionized water to neutrality to obtain precipitate 1 ;
[0027] (3) Mix solution 1 and precipitate 1 and sonicate again for 1 h, then stir for 23 h, and wash the obtained solid with deionized water to obtain precipitate 2;
[0028] (4) Mix the precipitate 2 with 80ml of 0.01mol / L NaOH solution, sonicate for 1h, then stir for 23h, condense and reflux at 60°C for 2h after stirring; wash the obtained solid with deionized water, drying to obtain a graphene-supported metal oxide catalyst;
[0029] The method of preparing 5-HMF from hexose by graphene-support...
Embodiment 6-10
[0033] The preparation method of graphene-supported metal oxide catalyst: (1) weigh 0.0006 mol of metal chloride, and use water as a solvent to prepare a solution 1 with a concentration of 0.5 mol / L;
[0034] (2) Mix 0.2g of graphene oxide and 100ml of 0.01mol / L NaOH solution, sonicate at room temperature for 1.5h, stir at room temperature for 24h after sonication, and then wash the obtained solid with deionized water until neutral to obtain a precipitate 1;
[0035] (3) Mix solution 1 and precipitate 1 and sonicate again for 1.5 h, then stir for 24 h, wash the obtained solid with deionized water, and obtain precipitate 2;
[0036] (4) Mix the precipitate 2 with 100ml of 0.01mol / L NaOH solution, sonicate for 1.5h, then stir for 24h, condense and reflux at 70°C for 2h after stirring; wash the obtained solid with deionized water, Under drying, obtain graphene-supported metal oxide catalyst;
[0037] Graphene-supported metal oxide catalyst catalyzes the method for preparing 5-H...
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