Preparation and application of gold-silver alloy nanoparticles for metal micro-nano structure assembly
A nanoparticle, gold-silver alloy technology, applied in metal processing equipment, nanotechnology, transportation and packaging, etc., to achieve uniform size distribution, high preparation efficiency, and good solubility.
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[0028] Example 1
[0029] Under stirring conditions, 1.5 g of tetrabutylammonium bromide was dissolved in 80 mL of toluene to prepare a solution with a mass concentration of about 2%, and then 4.66 ml of 2.0 mol / L nitric acid was added. Add 0.35g (2.08mmol) AgNO to the above solution under stirring 3 After the solution is clear and transparent, add 0.11g (0.26mmol) HAuCl to the reaction solution 4 ·4H 2 O, the toluene phase is reddish brown, and the water phase is separated after the water phase is colorless and transparent. Then, 1.4 g of dodecyl mercaptan was added to the reaction solution, and the solution was heated to 30-35°C. Finally, 21 mL of sodium borohydride aqueous solution with a mass concentration of 4% was poured into the reactor, and heating and stirring were continued for 24 hours. Wherein, the molar ratio of the reactants: tetrabutylammonium bromide, nitric acid, noble metal salt, dodecyl mercaptan, and sodium borohydride is 2:4:1:3:10. After the reaction, the ...
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[0030] Example 2
[0031] Under stirring conditions, 1.524 g of tetraoctyl ammonium bromide was dissolved in 80 mL of toluene to prepare a solution with a mass concentration of 2%, and then 3.25 ml of 1.5 mol / L sulfuric acid was added. Add 0.231g (1.36mmol) AgNO to the above solution under stirring 3 After the solution is clear and transparent, add 0.14g (0.34mmol) HAuCl to the reaction solution 4 ·4H 2 O, the toluene phase is reddish brown, and the water phase is separated after the water phase is colorless and transparent. Then 0.494 g of n-hexyl mercaptan was added to the reaction solution, and the solution was heated to 30-35°C. Finally, 20 mL of sodium borohydride aqueous solution with a mass concentration of 1.8% was poured into the reactor, and heating and stirring were continued for 12 hours. Wherein, the molar ratio of the reactants: tetraoctyl ammonium bromide, sulfuric acid, noble metal salt, n-hexyl mercaptan, and sodium borohydride is 2:3.5:1:3:7. After the reactio...
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[0032] Example 3
[0033] Under stirring conditions, 1.25 g of tetraoctyl ammonium chloride was dissolved in 70 mL of toluene to prepare a solution with a mass concentration of 2%, and then 3.7 ml of 1.0 mol / L hydrochloric acid was added. Add 0.105g (0.62mmol) AgNO to the above solution under stirring 3 After the solution is clear and transparent, add 0.255g (0.62mmol) HAuCl to the reaction solution 4 ·4H 2 O, the toluene phase is reddish brown, and the water phase is separated after the water phase is colorless and transparent. Then 0.36 g of n-octyl mercaptan was added to the reaction solution, and the solution was heated to 30-35°C. Finally, 20 mL of an aqueous solution with a mass concentration of 1.8% was poured into the reactor, and heating and stirring were continued for 12 hours. Wherein, the molar ratio of the reactants: tetraoctylammonium chloride, hydrochloric acid, noble metal salt, n-octyl mercaptan, and sodium borohydride is 2:3:1:2:8. After the reaction, the wate...
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