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Method for preparing small-diameter silver nanowire by utilizing mixed alcohols
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A technology of silver nanowires and mixed alcohols, applied in the direction of nanotechnology, etc., can solve the problems of high reaction temperature and difficulty in controlling the diameter of silver nanowires, and achieve the effects of low preparation cost, easy control of reaction conditions, and simple and easy methods
Inactive Publication Date: 2018-07-10
ZHEJIANG UNIV
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Therefore, it is still a challenge to find a simple, diameter-controllable and uniform synthesis method of silver nanowires.
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Embodiment 1
[0037] Embodiment 1, a kind of preparation method of silver nanowire, carries out following steps successively:
[0038] 1), weigh the FeCl with a mass of 10.4mg 3 Dissolve the crystals in 100ml ethylene glycol at room temperature, stir evenly, and prepare FeCl 3 solution, as an ionic aid for the growth of silver nanowires;
[0039] 2), take by weighing the silver nitratepowder that quality is 7.2g, stir and dissolve in 100ml ethylene glycol at room temperature, stir evenly, prepare silver nitrate solution, as the silver source of silver nanowire growth;
[0040] 3), take by weighing 0.6g, the surfactant PVP that molecular weight is 360,000 is added in the dry round bottom flask of 100ml; Measure the mixed alcohol that is formed by the ethylene glycol of 40ml and the glycerol of 10ml, put on magnetic Under stirring, add it to a round bottom flask, and heat it to 130°C in an oil bath. As the temperature increases, PVP gradually dissolves;
[0041] 4) When the temperature of...
Embodiment 2
[0044] Embodiment 2, a kind of preparation method of silver nanowire:
[0052] The reaction temperature in step 4) was changed from 130°C to 160°C, and the reaction time was changed from 2h to 1h.
[0053] The rest are equal to Example 1.
[0054] The average diameter of the prepared silver nanowires is 40-50nm; its SEM image is shown in image 3 shown. The length is 30-50 μm.
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Abstract
The invention discloses a method for preparing a small-diameter silver nanowire by utilizing mixed alcohols. The method comprises the following steps of dissolving FeCl3 into ethylene glycol, and obtaining an FeCl3 solution with the concentration being 10 to 11mg / 100ml; dissolving silver nitrate into the ethylene glycol, and obtaining a silver nitrate solution with the concentration being 7 to 8g / 100ml; adding 0.5 to 0.7g of surfactant PVP (Polyvinyl Pyrrolidone) into 50ml of mixed alcohols, heating until the surfactant PVP is dissolved, then adding 0.5ml of FeCl3 solution and 5ml of AgNO3 solution, reacting for 0.5h to 3h, and obtaining the silver nanowire. The silver nanowire prepared by adopting the method has better uniformity and a specific diameter, and the method is simple, easy andconvenient in synthesis process and beneficial for implementing industrial production.
Description
technical field [0001] The invention belongs to the field of synthesis of nanomaterials, and in particular relates to a method for efficiently and rapidly synthesizing small-diametersilver nanowires by using mixed alcohols composed of different types of alcohols. Background technique [0002] Silver nanowires are considered to be the most likely material to replace indiumtinoxide (ITO) due to their excellent electrical and thermal conductivity and toughness. ITO has been widely used in electronic products such as touch screens and LCD panels due to its excellent electrical conductivity, high visible light transmittance, and strong combination with glass substrates. However, in recent years, with the development of electronic products such as touch screens in the direction of high light transmission, high conductivity, and high flexibility, the requirements for transparent electrodes are getting higher and higher, and traditional indiumtinoxide with high film brittleness...
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