Synthesis method of noble metal nano particles
A technology of nanoparticles and a synthesis method, which is applied in the field of preparation of precious metal nanoparticles, can solve the problems of difficulty in preparing nanoparticles and weak protection of nanoparticles, and achieves the effects of simple and fast preparation process, environmental protection and pollution reduction.
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[0046] Example 1
[0047] At room temperature, take 1ml of RuCl with a concentration of 10mg / ml 3 The ethanol solution was added to a 50ml beaker, 70mg PVP and 10ml ethanol were added, stirred and mixed well. Add 0.1ml 6M fresh NaBH 4 The aqueous solution was quickly injected into the above mixed solution to react. After 1 minute, 0.05 ml of n-dodecanethiol was added, and stirring was continued for 15 minutes, flocculent precipitation gradually appeared. Add appropriate amount of ethanol to wash to remove residual PVP and dodecanethiol, centrifuge and dry to obtain Ru nanoparticles with an average particle size of 2nm ( figure 1 ).
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[0048] Example 2
[0049] At room temperature, take 1ml of RhCl with a concentration of 10mg / ml 3 The ethanol solution was added to a 50ml beaker, 100mg PVP and 10ml ethanol were added, and mixed well. 0.15ml 5M fresh NaBH 4 The aqueous solution was quickly injected into the above-mentioned mixed solution to react. After 1 minute, 0.06ml of n-dodecanethiol was added, and stirring was continued for 15 minutes, and flocculent precipitation gradually appeared. Add appropriate amount of ethanol to wash to remove residual PVP and dodecanethiol, centrifuge and dry to obtain Rh nanoparticles with an average particle size of 2nm ( figure 2 ).
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[0050] Example 3
[0051] At room temperature, take 1ml of PdCl with a concentration of 10mg / ml 2 Add the ethanol solution to a 50ml beaker, add 120mg PVP and 12ml ethanol, stir and mix well to obtain a transparent solution. Add 0.1ml 6M fresh NaBH 4 The aqueous solution was quickly injected into the above mixed solution to react. After 1 minute, 0.05 ml of n-dodecanethiol was added, and stirring was continued for 15 minutes, flocculent precipitation gradually appeared. Add appropriate amount of ethanol to wash to remove residual PVP and dodecanethiol, centrifuge and dry to obtain Pd nanoparticles with an average particle size of 3nm ( image 3 ), Figure 4 It shows that the synthesis of well-crystallized nano-palladium.
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