Multi-walled carbon nanotube-based noble metal catalyst and preparation method thereof
A technology of multi-walled carbon nanotubes and noble metal catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as agglomeration and improve selectivity , Improve recycling, improve the effect of catalytic activity
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Embodiment 1
[0017] At 25°C, measure 0.2 g of multi-walled carbon nanotubes and 25 mL of deionized water, add multi-walled carbon nanotubes to deionized water, ultrasonically disperse for 0.5 h, add 0.4 g of urea, magnetically stir for 2 h, and then add 1.3 mL of platinum An aqueous potassium chloroplatinite solution with an ion concentration of 7.5 mg / mL was stirred for 2 h, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 60 °C for 3 h to obtain a multi-walled carbon nanotube-precious metal composite.
[0018] At 25 °C, measure 15 mL of nitrogen-nitrogen dimethylformamide, 15 mL of deionized water, and 15 mL of absolute ethanol to prepare a mixed solution, add 0.2 g of the multi-walled carbon nanotube-precious metal composite obtained in the previous step, and stir for 15 min. Add 0.096g of 2,5-dihydroxyterephthalic acid and 0.476g of cobalt nitrate hexahydrate in turn, stir and react for 10h, transfer to a hydrothermal reactor, react at 100°C for 24h, cool to ro...
Embodiment 2
[0020] At 25°C, measure 0.2 g of multi-walled carbon nanotubes and 25 mL of deionized water, add multi-walled carbon nanotubes to deionized water, ultrasonically disperse for 0.5 h, add 0.4 g of urea, stir magnetically for 2 h, and add 1.3 mL of gold ions The chloroauric acid solution with a concentration of 7.5 mg / mL was stirred and reacted for 2 hours, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 60 °C for 3 hours to obtain a multi-walled carbon nanotube-precious metal composite.
[0021] At 25°C, measure 15 mL of petroleum ether, 15 mL of deionized water, and 15 mL of absolute ethanol to prepare a mixed solution, add 0.2 g of the multi-walled carbon nanotube-precious metal composite obtained in the previous step, stir for 15 min, and add 0.079 g of p-benzene in turn Diformic acid and 0.284g of cobalt chloride hexahydrate were stirred and reacted for 10h, transferred to a hydrothermal reactor, reacted at 100°C for 24h, cooled to room temperature,...
Embodiment 3
[0023] At 25°C, measure 0.2 g of multi-walled carbon nanotubes and 25 mL of deionized water, add multi-walled carbon nanotubes to deionized water, ultrasonically disperse for 0.5 h, add 0.4 g of urea, stir magnetically for 2 h, and add 1.3 mL of silver ions The silver nitrate aqueous solution with a concentration of 7.5 mg / mL was stirred and reacted for 2 h, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 60 °C for 3 h to obtain the multi-walled carbon nanotube-precious metal composite.
[0024] At 25°C, measure 15 mL of chloroform, 15 mL of deionized water, and 15 mL of absolute ethanol, prepare a mixed solution, add 0.2 g of the multi-walled carbon nanotube-precious metal composite obtained in the previous step, stir for 15 min, and add 0.079 g of phthalate in turn Formic acid and 0.284g of cobalt chloride hexahydrate were stirred and reacted for 10h, transferred to a hydrothermal reactor, reacted at 100°C for 24h, cooled to room temperature, washed...
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