Metallic nano cluster/silicon dioxide hollow nuclear shell structured nanoparticles and preparation method thereof
A metal nanocluster and core-shell structure technology, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of limiting the application performance of hollow metals with nanostructures, and the inability to control and adjust synchronously, so as to achieve controllable size and shape, Easy to operate, high output effect
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[0045] Example 1
[0046] 10g Dissolve in 50mL cyclohexane, stir and heat to 50℃, after complete dissolution, add dropwise 1M cobalt chloride solution 1.5mL, stir for 1h, add 2mL 80% hydrazine hydrate solution, stir and react for 5-50 minutes, adjust the reaction with ammonia The pH value of the solution is 10.5-11, 10 g of ethyl orthosilicate is added dropwise, and the reaction is stirred for 2 hours. After centrifugation, washing, drying, roasting, reduction, electron microscope observation, such as figure 1 As shown, the product particles are uniform, the particle size is 40-50nm, the nanometal particle size is less than 4nm, and the cavity diameter is 8-10nm.
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[0047] Example 2
[0048] 10g Dissolve in 50mL cyclohexane, stir and heat to 50℃, after complete dissolution, add 1.5mL 1M cobalt chloride solution dropwise, stir for 1h, then add 1.5mL 1M ethylenediamine (or triethanolamine / diethylenetriamine / tetra Ethylene pentamine) solution, after being evenly dispersed, add 1.0 g of NaBH 4 / LiAlH 4 , The reaction is stirred for 5-50 minutes, the pH of the reaction solution is adjusted to 10.5-11 with ammonia water, 10 g of ethyl orthosilicate is added dropwise, and the reaction is stirred for 2 hours. After centrifugation, washing, drying, roasting, reduction, electron microscope observation, such as figure 2 As shown, the product particles are uniform, the particle size is 40-50nm, the nanometal particle size is less than 4nm, and the cavity diameter is 8-10nm.
Example Embodiment
[0049] Example 3
[0050] 10g Dissolve in 50mL cyclohexane, stir and heat to 50℃, after complete dissolution, add 1.5mL 1M nickel nitrate solution dropwise, stir for 1h, add 2mL 80% hydrazine hydrate solution, stir and react for 5-50 minutes, adjust the reaction solution with ammonia The pH value is 10.5-11, 10 g of ethyl orthosilicate is added dropwise, and the reaction is stirred for 2 hours. After centrifugation, washing, drying, roasting, reduction, electron microscope observation, such as image 3 As shown, the product particles are uniform, the particle size is 20-30nm, the nanometal particle size is less than 4nm, and the cavity diameter is 8-10nm.
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