Preparation method of silver nanoparticle filled microporous carbon spheres and use thereof as catalyst
A technology of silver nanoparticles and microporous carbon, which is applied in the preparation of organic compounds, catalysts for physical/chemical processes, chemical instruments and methods, etc., can solve the problems of no preparation methods, and achieve uniform distribution, good controllability, and single Good dispersion effect
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 Transfer 44 mL of 0.3 M sucrose aqueous solution into a 88 mL hydrothermal reaction vessel (50% full) and seal it. Then put the reaction kettle into an oven, the oven temperature is 190°C, and the reaction time is 2.25h. After the reaction was complete, it was taken out and cooled in air. Finally, the microporous carbon spheres were prepared by centrifugally cleaning with distilled water and alcohol, and drying in an oven.
 figure 1 a is a transmission electron microscope (TEM) picture of the microporous carbon spheres obtained in Example 1. It can be seen that the microporous carbon spheres are relatively uniform in size, with an average diameter of about 800nm; figure 1 b is a high-resolution image of the edge of the microporous carbon sphere. Numerous nanopores are distributed on the surface of the microporous carbon sphere. It can be inferred that the carbon sphere has a microporous structure, which provides a prerequisite for ions to enter the interior...
 Using the microporous carbon spheres obtained in Example 1 as a raw material, Ag-C composite spheres were prepared according to the above-mentioned method for preparing microporous carbon spheres filled with silver nanoparticles, and the reaction parameters were c=2mM, t I = 2h, P = 140W and t R = 10 min.
 figure 2 It is the TEM pictures of different magnifications of Ag-C composite balls obtained in Example 2. From low magnification ( figure 2 a) It can be seen that a large number of small black spots are distributed inside the ball, but there are no balls on the surface. The black dots are nanoparticles with high number density but still uniform distribution. Since TEM is a two-dimensional projection image of a three-dimensional object, the center of the ball is very dark, and it seems that there are agglomerates of nanoparticles, which is due to the overlapping of two-dimensional imaging. The selected area electron diffraction (SAED) pattern of a singl...
 Using the microporous carbon spheres obtained in Example 1 as a raw material, Ag-C composite spheres were prepared according to the above-mentioned preparation method of silver nanoparticles filled microporous carbon spheres, and the reaction parameters were c=0.5mM, t I = 4h, P = 140W and t R = 10 min.
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