A kind of supported noble metal nanoparticle composite material and preparation method thereof
A nanoparticle and composite material technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor uniformity of metal nanoparticles, wide particle size distribution, harsh reaction conditions, etc. Achieve the effects of stable binding, narrow distribution range and simple preparation method
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Embodiment 1
[0060] First, according to literature (Li, H.; Ma, H.; Wang, X.; Gao, J.; Chen, C.; Shi, S.; Qu, M.; Feng, N.; Xu, J. Journal of Energy Chemistry 2014,23,742) prepared ZIF-67. Weigh 20mg of ZIF-67 powder, dissolve in 10ml of methanol, and ultrasonically dissolve for 10min to obtain a purple suspension system. Prepare 50mM aqueous solution of chloropalladic acid. Use a pipette to pipette 300 μL of the chloropalladium acid aqueous solution, slowly drop it into the ZIF-67 methanol solution system (ie, the above-mentioned purple suspension system), and stir for 6 hours to complete the impregnation process. Weigh 7.2 mg of sodium borohydride, dissolve it in 1 ml of cooled methanol, and ultrasonically dissolve it for 10 s, then add the obtained dispersion into the above impregnation system, and the system changes from purple to black. Stir continuously for 1 h, then centrifuge at 8000 rpm for 10 min, separate the supernatant, and wash with methanol three times repeatedly. The sam...
Embodiment 2
[0064] ZIF-67 was prepared by the same method as in Example 1. Weigh 20mg of ZIF-67 powder, dissolve in 10ml of methanol, and ultrasonically dissolve for 10min to obtain a purple suspension system. Prepare 50mM chloroplatinic acid aqueous solution. Use a pipette to pipette 300 μL of the chloroplatinic acid aqueous solution, slowly drop it into the ZIF-67 methanol solution system (ie, the above-mentioned purple suspension system), and stir for 6 hours to complete the impregnation process. Weigh 7.2 mg of sodium borohydride, dissolve it in 1 ml of cooled methanol, and ultrasonically dissolve it for 10 s, then add the obtained dispersion into the above impregnation system, and the system changes from purple to black. Stir continuously for 1 h, then centrifuge at 8000 rpm for 10 min, separate the supernatant, and wash with methanol three times repeatedly. The samples were dried at room temperature in the dark for 12 h to obtain a ZIF-67-loaded platinum nanoparticle composite, wh...
Embodiment 3
[0068] First, ZIF-67 was prepared by the same method as in Example 1. Weigh 20mg of ZIF-67 powder, dissolve in 10ml of methanol, and ultrasonically dissolve for 10min to obtain a purple suspension system. Prepare 50mM chloroauric acid aqueous solution. Use a pipette to pipette 300 μL of the chloroauric acid aqueous solution, slowly drop it into the ZIF-67 methanol solution system (ie, the above-mentioned purple suspension system), and stir for 6 hours to complete the impregnation process. Weigh 7.2 mg of sodium borohydride, dissolve it in 1 ml of cooled methanol, and ultrasonically dissolve it for 10 s, then add the obtained dispersion into the above impregnation system, and the system changes from purple to black. Stir continuously for 1 h, then centrifuge at 8000 rpm for 10 min, separate the supernatant, and wash with methanol three times repeatedly. The samples were dried at room temperature in the dark for 12 h to obtain a ZIF-67-loaded gold nanoparticle composite, named...
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