A method for preparing au nanoflowers by a microwave-assisted method and au nanoflowers
A microwave-assisted, nano-flower technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve good monodispersity, uniform particles, and high energy efficiency
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Embodiment 1
[0033] A method of microwave-assisted preparation of Au nanoparticles flower, comprising the steps of:
[0034] A step of adding a certain concentration of HAuCl4 round bottom flask was added followed octadecylamine, and PVP KBr form a mixed solution a;
[0035] Step two, the reducing agent is added in a mixed solution of tetraethylene glycol (the TEG), mixed and stirred to obtain a mixed solution B;
[0036] Step three, the mixed solution was placed in a microwave reactor b heat the reaction;
[0037] Step 4 The product of Step III is treated with acetone to give after Au nanoparticles flowers;
[0038] Specifically, a configuration step 5mL concentration of HAuCl 20mM 4 Solution.
[0039] Further, the step of adding a concentration of 2ml of a 1M solution of octadecylamine.
[0040] Further, a step of KBr was added 20mg.
[0041] Further, the amount of PVP in a step 50mg.
[0042] Further, the step II was added 20mL of TEG 0.4M concentration.
[0043] Further, the mixed solution...
Embodiment 2
[0046] A method of microwave-assisted preparation of Au nanoparticles flower, comprising the steps of:
[0047] A step disposed in a round-bottomed flask 5mL concentration of the HAuCl 20mM 4 Solution; followed by the addition 2ml 5M concentration solution of octadecylamine, 20mg of KBr; 50mg PVP formed a mixed solution of a;
[0048] Step two, the concentration of the mixed solution was added 20mL for a TEG 0.4M, and kneading to obtain a mixed solution B;
[0049] Step three, the mixed solution was placed in a microwave reactor b microwave frequency of 890 ~ 2400MHz microwave heated to a temperature of 180 ℃, heating the reaction held for 1min;
[0050] Step 4 The product of Step III was washed with acetone to give Au nanoflowers after 3-5 treatments.
[0051] like Figure 4 Shown, Au nanoflowers a scanning electron microscope view of the present embodiment was prepared, showing the size of Au nanoflowers 0.73μm-1.1μm, wherein the length of the petals is 0.34 m, the width of the...
Embodiment 3
[0053] A method of microwave-assisted preparation of Au nanoparticles flower, comprising the steps of:
[0054] A step disposed in a round-bottomed flask 5mL concentration of the HAuCl 20mM 4 Solution; followed by the addition 2ml 1M concentration solution of octadecylamine, 20mg of KBr; 100mg PVP formed a mixed solution of a;
[0055] Step two, the concentration of the mixed solution was added 20mL for a TEG 0.4M, and kneading to obtain a mixed solution B;
[0056] Step three, the mixed solution was placed in a microwave reactor b microwave frequency of 890 ~ 2400MHz microwave heated to a temperature of 180 ℃, heating the reaction maintained for 5min;
[0057] Step 4 The product of Step III was washed with acetone to give Au nanoflowers after 3-5 treatments.
[0058] like Figure 5 Shown, Au nanoflowers transmission electron microscopy were prepared FIG embodiment of the present embodiment, it can be seen from the figure, Au nanoflowers size of 1.68μm-2μm, petal length of 0.46 m,...
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