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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Embodiment 1
[0046] 10g Dissolve in 50mL cyclohexane, stir and heat to 50°C, after complete dissolution, add 1.5mL of 1M cobalt chloride solution dropwise, stir for 1h, add 2mL of 80% hydrazine hydrate solution, stir for 5-50 minutes, adjust the reaction with ammonia water 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, and reduction, electron microscope observation is carried out, such as figure 1 As shown, the product particles are uniform, the particle size is 40-50nm, the nano-metal particle size is <4nm, and the cavity diameter is 8-10nm.
Embodiment 2
[0048] 10g Dissolve in 50mL cyclohexane, stir and heat to 50°C, after complete dissolution, add 1.5mL 1M cobalt chloride solution dropwise, stir for 1h, then add 1.5mL 1M ethylenediamine (or triethanolamine / diethylenetriamine / tetra ethylenepentamine) solution, after being uniformly dispersed, add 1.0 g of NaBH 4 / LiAlH 4 , stirred and reacted for 5-50 minutes, adjusted the pH value of the reaction solution to 10.5-11 with ammonia water, added 10 g of ethyl orthosilicate dropwise, and stirred and reacted for 2 hours. After centrifugation, washing, drying, roasting, and reduction, electron microscope observation is carried out, such as figure 2 As shown, the product particles are uniform, the particle size is 40-50nm, the nano-metal particle size is <4nm, and the cavity diameter is 8-10nm.
Embodiment 3
[0050] 10g Dissolve in 50mL cyclohexane, stir and heat to 50°C, after complete dissolution, add 1.5mL of 1M nickel nitrate solution dropwise, stir for 1h, add 2mL of 80% hydrazine hydrate solution, stir for 5-50 minutes, adjust the reaction solution with ammonia water 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, and reduction, electron microscope observation is carried out, such as image 3 As shown, the product particles are uniform, the particle size is 20-30nm, the nano-metal particle size is <4nm, and the cavity diameter is 8-10nm.
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