High-pressure hydrothermal method for preparing precious metal nanometer particles and with reaction temperature controllable
A nanoparticle and reaction temperature technology, applied in the field of nanomaterials, can solve the problems of unknown pressure effect and invisible actual reaction temperature of pressure, and achieve the effects of simple steps, diversified control methods, and environmental protection.
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Embodiment 1
[0031] Prepare a gold decahedron nanomaterial, the steps are as follows:
[0032] (1) Add cetyltrimethylammonium chloride and polyvinylpyrrolidone into a glass container, then add chloroauric acid, and finally add water, stir evenly to obtain a reaction solution, and in the reaction solution, cetyl The concentration of trimethylammonium chloride is 0.23mol / L, the concentration of polyvinylpyrrolidone is 1.34 wt%, and the concentration of chloroauric acid is 3 mmol / L;
[0033] (2) Transfer the above reaction liquid into a polytetrafluoroethylene liner, then put the liner into the reaction kettle, seal the reaction kettle and fill it with nitrogen until the pressure inside the kettle is 1.00 MPa;
[0034] (3) Add the reactor to an oil bath at a temperature of 200°C, and react for 2 hours. During the reaction, the pressure gauge shows that the pressure inside the kettle is 2.0MPa (calculated, the boiling point here is 212°C);
[0035] (4) Take out the reaction kettle, take out t...
Embodiment 2
[0037] Prepare a gold decahedron nanomaterial, the steps are as follows:
[0038] (1) Add cetyltrimethylammonium chloride and polyvinylpyrrolidone into a glass container, then add chloroauric acid, then add water, stir evenly to obtain a reaction solution, and in the reaction solution, cetyl trimethyl The concentration of methyl ammonium chloride is 0.23 mol / L, the concentration of polyvinylpyrrolidone is 1.34 wt%, and the concentration of chloroauric acid is 3 mmol / L;
[0039] (2) Transfer the above reaction solution into a polytetrafluoroethylene liner, and then put the liner into the reaction kettle. After sealing the reaction kettle, fill it with nitrogen until the pressure inside the kettle is 0.50 MPa;
[0040] (3) Add the reactor to an oil bath at a temperature of 200°C for 2 hours of reaction. During the reaction, the pressure gauge shows that the pressure inside the kettle is 1.1MPa (calculated, the boiling point here is 184°C);
[0041] (4) Take out the reaction ke...
Embodiment 3
[0043] Prepare a gold decahedron nanomaterial, the steps are as follows:
[0044] (1) Add cetyltrimethylammonium chloride and polyvinylpyrrolidone into a glass container, then add chloroauric acid, then add water, stir evenly to obtain a reaction solution, and in the reaction solution, cetyl trimethyl The concentration of methyl ammonium chloride is 0.23 mol / L, the concentration of polyvinylpyrrolidone is 1.34 wt%, and the concentration of chloroauric acid is 3 mmol / L;
[0045] (2) Transfer the above reaction solution into a polytetrafluoroethylene liner, and then put the liner into the reaction kettle. Close the reactor, the pressure gauge shows a reading of 0.10 MPa;
[0046] (3) Add the reactor to an oil bath at 200 °C for 2 hours of reaction. During the reaction, the pressure gauge shows that the pressure inside the autoclave is 0.15 MPa (calculated, the boiling point here is 78 °C);
[0047] (4) Take out the reaction kettle, take out the reaction solution after cooling wi...
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