Method for preparing nano porous gold
A nanoporous gold and alloy technology, applied in the field of nanoporous gold preparation, can solve the problems of complex process, high cost, and difficult precise control of Zn-Au alloy composition, and achieve simple operation process, accelerated reaction speed, and suitable for large-scale The effect of industrial production
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[0014] Example one
[0015] (1) Put the Al-Au alloy into the smelting furnace according to the proportion of 33.4% Au at atomic percentage and the rest being Al. The alloy is heated to a molten state and fully stirred to alloy it. The molten liquid is blown out quickly with argon at a pressure of 0.1MPa, and then chilled on a high-speed rotating copper roller to obtain an alloy ribbon with a thickness of 20-40 microns, a width of 2-5 mm, and a length of 1-5 cm. .
[0016] (2) React with 5% hydrochloric acid solution at 25°C for 0.5 hours, then heat to 90°C for 0.5 hours until no obvious reaction bubbles are generated, stop heating.
[0017] (3) Collect the reacted products, and rinse them repeatedly with distilled water until the chemical corrosive solution is completely cleaned (extensive pH test paper checks that the rinsed distilled water is neutral). Then dry and store at 25°C. The pore size and pore wall size are 60-80 nanometers, and the pore structure is evenly distributed....
Example Embodiment
[0018] Example two
[0019] (1) Put the Al-Au alloy into the smelting furnace according to the proportion of 20 atomic percent Au and the rest being Al. The alloy is heated to a molten state and fully stirred to alloy it. The molten liquid is blown out quickly with argon at a pressure of 0.1MPa, and then chilled on a high-speed rotating copper roller to obtain an alloy ribbon with a thickness of 30-50 microns, a width of 2-5 mm, and a length of 5-20 cm. .
[0020] (2) React with 5% hydrochloric acid solution at 25°C for 0.5 hours, then heat to 90°C for 0.5 hours until no obvious reaction bubbles are generated, stop heating.
[0021] (3) Collect the reacted products, and rinse them repeatedly with distilled water until the chemical corrosive solution is completely cleaned (extensive pH test paper checks that the rinsed distilled water is neutral). Then dry and store at 25°C. The nanoporous gold has a dual-mode pore distribution.
Example Embodiment
[0022] Example three
[0023] The other steps are the same as in the second embodiment, replacing argon with nitrogen and 5% hydrochloric acid solution with 5% sulfuric acid solution. The nanoporous gold has a dual-mode pore distribution.
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