Preparation method for platinum nanowire
A technology of platinum nanowires and chloroplatinic acid, applied in the field of nanomaterials, achieves the effects of high yield, simple synthesis process, high controllability and stability
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Embodiment 1
[0019] Dissolve 1.0 mg of chymotrypsin powder in 1.0 mL of prepared glycine-hydrochloric acid buffer solution with a concentration of 8 mM and pH=2.4 to prepare a chymotrypsin solution, vortex and mix thoroughly, and then add 0.1 ml of trifluoroethanol to the solution, Incubate for 50 h on an air shaker at 20° C. with a rotational speed of 120 r / min to obtain a chymotrypsin fiber suspension. Take 180 μL of chymotrypsin fiber suspension, add 80 μL of chloroplatinic acid with a concentration of 5 mM and pH=1.6 to it, mix thoroughly, and incubate on a shaking table at 10°C and 80 r / min for 20 h, then add 5 mM chloroplatinic acid drop by drop. 90 μL of sodium borohydride was used for reduction, and the reaction was completed by incubating on a shaker at 10°C and 80 r / min for 15 hours to obtain platinum nanowires.
[0020] Such as figure 1 The resulting single platinum nanowire is shown to have a diameter of about 34 nm and a length of about 540 nm.
Embodiment 2
[0022] Dissolve 1.0mg of chymotrypsin powder in 0.67mL of prepared glycine-hydrochloric acid buffer solution with a concentration of 10mM and pH=2.5 to prepare a chymotrypsin solution, vortex and mix thoroughly, and then add 0.09ml of trifluoroethanol to the solution, Incubate for 48 hours on an air shaker at 25° C. with a rotational speed of 135 r / min to obtain a chymotrypsin fiber suspension.
[0023] Take 190 μL of chymotrypsin fiber suspension, add 100 μL of chloroplatinic acid with a concentration of 3 mM and pH=2.0 to it, mix well, place it on a shaker at 16 ° C and 90 r / min for 12 h, and then add the concentration of 10 mM 60 μL of sodium borohydride was used for reduction, and the reaction was completed by incubating on a shaker at 16°C and 90 r / min for 12 hours to obtain platinum nanowires.
[0024] Such as figure 2 As shown, a large number of platinum nanowires can be obtained, and the diameter of the platinum nanowires is about 15 nm, up to a micron.
Embodiment 3
[0026] Take 1.0mg of chymotrypsin powder, dissolve it in 0.5mL of prepared glycine-hydrochloric acid buffer solution with a concentration of 12mM and pH=2.6 to prepare a chymotrypsin solution, vortex and mix well, then add 0.09ml of trifluoroethanol to the solution , and incubated for 45 hours on an air shaker at 30° C. with a rotational speed of 150 r / min to obtain a chymotrypsin fiber suspension.
[0027] Take 180 μL of chymotrypsin fiber suspension, add 200 μL of chloroplatinic acid with a concentration of 2.5 mM and pH=2.5 to it, mix well, place it on a shaking table at 20 °C and 100 r / min for 10 h, and then add the concentration of 80 μL of 8 mM dimethylamine borane was used for reduction, and incubated at 20°C for 10 h on a shaker at 100 r / min to complete the reaction to obtain platinum nanowires.
[0028] Such as image 3 The obtained platinum nanowires have a diameter of about 21 nm and a length of about 900 nm.
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