L-proline/MWCNTs (multi-walled carbon nanotubes) high-load type catalyst and preparation method and application thereof
A catalyst and high-load technology, applied in the direction of physical/chemical process catalysts, catalytic reactions, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of catalytic performance and low loading capacity, and achieve simple and efficient operation Ease of operation, good catalytic effect and cycle stability
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Embodiment 1
[0046] 0.1 g of multi-walled carbon nanotubes (MWCNTs) and 1.5 g of L-proline (13.0 mmol) were mixed in deionized water (5.0 mL), and stirred at room temperature for 8 h. After centrifugation, the precipitate was collected and dried overnight in an oven to obtain a black powder of L-proline / MWCNTs.
[0047] figure 2 Thermogravimetric analysis (TGA) of relevant materials is shown. MWCNT( figure 2 a) itself shows little weight loss below 800 °C, most likely due to the pyrolysis of oxygen-containing functional groups on MWCNTs. Pure L-Proline ( figure 2 b) exhibits a characteristic weight loss starting at 229°C and dropping to nearly zero weight at 347°C. L-proline / MWCNTs catalyst ( figure 2 c) shows a slight weight loss (11 wt%) around 200°C. However, the most striking aspect of this curve is the similar percentage weight loss to the L-proline curve. It is calculated that the content of L-proline in the catalyst is as high as 67wt%. The elemental analysis of the cata...
Embodiment 2
[0052] 0.05 g of multi-walled carbon nanotubes (MWCNTs) and 1 g of L-proline (13.0 mmol) were mixed in deionized water (5 mL), and stirred at room temperature for 10 h. After centrifugation, collect the precipitate, wash it with water three times, centrifuge again, collect the precipitate, and dry it in an oven to obtain L-proline / MWCNTs black powder
Embodiment 3
[0054] 0.3 g of multi-walled carbon nanotubes (MWCNTs) and 5 g of L-proline (13.0 mmol) were mixed in deionized water (15 mL), and stirred at room temperature for 12 h. After centrifugation, collect the precipitate, wash it with water three times, centrifuge again, collect the precipitate, and dry it in an oven to obtain L-proline / MWCNTs black powder
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