A controllable synthesis method for preparing gold-nickel core-shell nanostructures in ethylene glycol system
A technology of nanostructure and synthesis method, applied in the direction of coating, etc., can solve the problems of high cost, low cost of ingredients, complex process and system, etc., and achieve the effect of low cost, good stability and simple operation
Inactive Publication Date: 2014-10-22
BEIHANG UNIV
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Problems solved by technology
The cost of the ingredients used in the method is low, and the obtained gold-nickel core-shell nanostructure has good uniformity, high purity, excellent performance and good stability; it overcomes the disadvantages of complex processes and systems required by the prior art and high cost
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[0030] See Figure 4 , the present invention will be further described in detail below in conjunction with the accompanying drawings. A controllable synthesis method for preparing a gold-nickel core-shell nanostructure in an ethylene glycol system is invented, which includes the following steps:
[0031] Step 1: Add polyvinylpyrrolidone with a molecular weight of 30,000 to the ethylene glycol solvent, mix and stir until dissolved;
[0032] Step 2: Put the 17×10 -3 The sodium citrate aqueous solution of mol / L is added in the ethylene glycol solution of step 1, stirs until mixing;
[0033] Step 3: Infuse nitrogen gas (flow rate 60ml / min), heat the solution to 185°C, and drop in 2.4×10 at a rate of 300ml / h -3 mol / L ethylene glycol solution of chloroauric acid, reacted for 0.5h;
[0034] Step 4: Keep the heating temperature constant, add 7.2×10 at a rate of 100ml / h -3 mol / L nickel nitrate and 25×10 -3 A mixed ethylene glycol solution of mol / L sodium hydroxide was reacted for ...
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Abstract
A controllable synthetic method for preparing gold-nickel core-shell nanostructure with an ethylene glycol system comprises eight main steps: 1, adding polyvinyl pyrrolidone into ethylene glycol solution, and mixing and churning until the polyvinyl pyrrolidone is dissolved; 2, adding sodium citrate aqueous solution into the ethylene glycol solution of the previous step, and churning until the solution is uniform; 3, inletting nitrogen, adding chloroauric acid solution at the rate of 300 ml / h under the temperature of 185 DEG C, and reacting for 0.5 h; 4, keeping the temperature constant, adding the mixed solution of nickel nitrate and sodium hydroxide at the rate of 100 ml / h, and reacting for 1 h; 5, cleaning the reaction liquid prepared in the previous step at the centrifugal rotation speed of 10 000 rpm to 15 000 rpm for 3 to 10 min; 6, cleaning the reaction liquid prepared in the previous step with trichloromethane in the ultrasonic wave of 50 to 100 MHz for 5 to 10 min; 7, cleaning the reaction liquid prepared in the previous step with extracted pure alcohol in the ultrasonic wave of 50 to 100 MHz for 5 to 10 min; and 8, ultrasonically cleaning the reaction liquid prepared in the previous step with extracted pure alcohol in the ultrasonic wave of 50 to 100 MHz for 5 to 10 min, then the gold-nickel core-shell nanostructure is obtained.
Description
technical field [0001] The invention relates to a controllable synthesis method for preparing a gold-nickel core-shell nanostructure in an ethylene glycol system. It is a method for uniformly growing a gold-nickel core-shell nanostructure using ethylene glycol as a solvent under heating conditions of 185°C. Controlled synthesis method. It belongs to the technical field of metal nanomaterials. Background technique [0002] In the past 20 years, the study of nanomaterials has always attracted the great interest of scientists. Due to the small particle size, large specific surface area, and high surface activity of nanomaterials, they are prone to agglomeration and lose their original characteristics; nanomaterials with a single structure and composition are often difficult to meet the needs of practical applications in terms of performance. For this reason, the structure and composition of materials can be designed and tailored at the nanometer and atomic scales, which has b...
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IPC IPC(8): B22F9/24B22F1/02
Inventor 王荣明黄凌峰崔益民
Owner BEIHANG UNIV