A method for in-situ preparation of highly dispersed metal catalysts by growing two-dimensional nanosheets
A two-dimensional nanotechnology for preparing metals, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. issues such as being effectively protected, achieving the effects of low cost, small scale, and efficient and easy methods
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Embodiment 1
[0024] Dissolve 3.6349g nickel nitrate hexahydrate in 10ml deionized water to prepare salt solution A1, impregnate A1 solution in 7.3363g commercial γ-Al 2 o 3 and ultrasonically disperse for 30 minutes, dry at 120°C for 2 hours, pass through nitrogen protection, place in an ice-water bath, and mechanically stir vigorously; prepare a reducing agent mixture B1 containing 1.8915 g of sodium borohydride, 0.2 g of sodium hydroxide and 25 ml of water . Add the prepared reducing agent mixture B1 dropwise to the above impregnation system with a peristaltic pump. The dropwise addition time is 90 minutes. After the dropwise addition, continue to react for 2 hours to wait for sufficient reduction. Suction filter the reacted product, and then filter it with deionized water and dehydrated ethanol until the filtrate is neutral, then put it into a beaker with 200ml dehydrated ethanol and stir it openly, the stirring speed is 400r / min, and the stirring time 16h, the catalyst precursor of n...
Embodiment 2
[0026] Dissolve 5.0500g of ferric nitrate nonahydrate in 8ml of deionized water to prepare salt solution A, impregnate solution A in 6.1136g of commercial SiO 2 and ultrasonically disperse for 30 minutes, dry at 120°C for 2 hours, pass through nitrogen protection, place in an ice-water bath, and mechanically stir vigorously; prepare a reducing agent mixture B containing 1.8915 g of sodium borohydride, 0.2 g of sodium hydroxide and 25 ml of water . Add the prepared reducing agent mixture B to the above impregnation system dropwise with a peristaltic pump. The dropwise addition time is 90 minutes. After the dropwise addition, continue to react for 2 hours to wait for sufficient reduction. Suction filter the reacted product, and then filter it with deionized water and dehydrated ethanol until the filtrate is neutral, then put it into a beaker with 200ml dehydrated ethanol and stir it openly, the stirring speed is 400r / min, and the stirring time For 16h, the catalyst precursor of...
Embodiment 3
[0028] Dissolve 3.6379g of cobalt nitrate hexahydrate in 28ml of deionized water to prepare salt solution A, impregnate solution A in 4.8911g of commercial TiO 2and ultrasonically disperse for 30 minutes, dry at 120°C for 2 hours, pass through nitrogen protection, place in an ice-water bath, and mechanically stir vigorously; prepare a reducing agent mixture B containing 1.8915 g of sodium borohydride, 0.2 g of sodium hydroxide and 25 ml of water . Add the prepared reducing agent mixture B to the above impregnation system dropwise with a peristaltic pump. The dropwise addition time is 90 minutes. After the dropwise addition, continue to react for 2 hours to wait for sufficient reduction. Suction filter the reacted product, and then filter it with deionized water and dehydrated ethanol until the filtrate is neutral, then put it into a beaker with 200ml dehydrated ethanol and stir it openly, the stirring speed is 400r / min, and the stirring time For 16h, the catalyst precursor of...
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