A kind of preparation method of silver nanosheet
A silver nanosheet and concentration technology, applied in nanotechnology and other directions, can solve the problems of harsh reaction conditions, complex production process, not green and environmental protection, etc., and achieve the effects of simple equipment, good repeatability and low cost
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[0026] The invention provides a kind of preparation method of silver nanosheet, comprises the following steps:
[0027] (1) preparation of polydopamine solution;
[0028] (2) Preparation of silver nanosheets.
[0029] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with specific embodiments.
[0030] Step 1: Preparation of polydopamine particles
[0031] In one embodiment, this step can be specifically performed as follows: 2-5 g of dopamine, 0.1-0.3 g of copper sulfate, and 0.2-0.5 mL of hydrogen peroxide are sequentially dissolved in 100-200 mL of Tris buffer solution with pH=7-10 , mechanically stirred for 30-120 minutes, and centrifuged several times to obtain polydopamine particles;
[0032] Step 2: Preparation of silver nanosheets
[0033] In one embodiment, this step can be specifically performed as follows: 0.017-0.17g of silver n...
Embodiment 1
[0040] This implementation case shows a kind of preparation method of silver nanosheet according to the following steps:
[0041] (1) Preparation of polydopamine solution: 2 g of dopamine, 0.1 g of copper sulfate and 0.2 mL of hydrogen peroxide were sequentially dissolved in 100 mL of Tris buffer, mechanically stirred for 45 min, and centrifuged several times to obtain a polydopamine solution.
[0042] (2) Preparation of silver nanosheets: Dissolve 0.05g silver nitrate and 0.1g copper sulfate in 50mL deionized water, then add dropwise the polydopamine solution in 1mL step (1), and react with mechanical stirring for 30min to prepare silver nanosheets .
[0043] For the morphology and structure of the polydopamine prepared in this embodiment, please refer to Figure 3-4 , image 3 It is the TEM figure of the polydopamine prepared by embodiment 1 in a kind of preparation method of silver nanosheet of the present invention, Figure 4 It is a TEM image of the silver nanosheets p...
Embodiment 2
[0045] This implementation case shows a kind of preparation method of silver nanosheet according to the following steps:
[0046] (1) Preparation of polydopamine solution: 3 g of dopamine, 0.15 g of copper sulfate and 0.3 mL of hydrogen peroxide were sequentially dissolved in 150 mL of Tris buffer, mechanically stirred for 60 min, and centrifuged several times to obtain a polydopamine solution.
[0047] (2) Preparation of silver nanosheets: Dissolve 0.1g silver nitrate and 0.15g copper sulfate in 75mL deionized water, then add dropwise the polydopamine solution in 2mL step (1), and mechanically stir for 45min to prepare silver nanosheets .
[0048] For the morphology and structure of the polydopamine prepared in this embodiment, please refer to Figure 5 , Figure 5 It is a TEM image of the silver nanosheets prepared in Example 2 in a method for preparing silver nanosheets of the present invention. Such as Figure 5 As shown, the size of the prepared silver nanosheets is a...
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Abstract
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