Macro preparation method for superfine tellurium nanowires

A tellurium nanowire and macro-quantity technology, applied in the field of nanomaterial preparation, can solve the problems of difficulty in ensuring product quality and uniformity, thick tellurium nanowire diameter, low yield of tellurium nanowire, etc., so as to facilitate mass synthesis and achieve uniform quality. , the effect of thin diameter

Inactive Publication Date: 2013-02-06
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0004] The prior art discloses a lot of synthesis of nanomaterials using the template method, such as the American Chemical Society Nano (AcsNano, 2010 No. 4, page 2307) reported that silver telluride nanowires were used as templates to successfully synthesize telluride Cadmium, lead telluride, silver telluride and platinum telluride nanowires; German "Advanced Functional Materials" (Adv. Synthesized bismuth telluride-tellurium one-dimensional heterogeneous nanostructure; Zhu Junjie et al. invented a simple and fast method to prepare tellurium nanowires with smooth surface (CN1301346C); MC, Kum et al. Cadmium telluride nanowire arrays (Kum M.C., Yoo Y.B2008, 19, 325711), and the tellurium nanowires synthesized by these methods are thicker and uneven in diameter, which is not conducive to subsequent use; in addition, the tellurium nanowires synthesized by the above methods The production line is low. To obtain a large amount of products, repeated experiments are required, and it is difficult to guarantee the quality and uniformity of the products.

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[0025] The invention provides a macro-preparation method of ultrafine tellurium nanowires, comprising the following steps:

[0026] A) Sodium tellurite and the reducing agent react under the action of polyvinylpyrrolidone pH regulator to obtain a reaction mixture;

[0027] B) rapidly cooling the reaction mixture with cold water to obtain a tellurium nanowire mother liquor, and extracting with a solvent to obtain a tellurium nanowire.

[0028] In the present invention, the sodium tellurite and the reducing agent react under the action of the polyvinylpyrrolidone pH regulator to obtain a reaction mixture. In the present invention, the surfactant polyvinylpyrrolidone and the tellurium source sodium tellurite are preferably stirred and then dissolved Into the water, quickly add the pH adjuster and the reducing agent, transfer the solution to the reaction kettle, and heat the reaction to obtain the reaction mixture. Wherein, the stirring is preferably mechanical stirring; the wate...

Embodiment 1

[0033] Add 1.0g polyvinylpyrrolidone (PVP) (Shanghai Reagent Company, molecular weight ≈40,000) into the inner lining of a 50mL polytetrafluoroethylene reactor filled with 32mL deionized water, and mix 1.0g sodium tellurite ( Na 2 TeO 3 ) Add the above solution and stir evenly, quickly add 3.35mL ammonia water with a mass percentage of 25% and 1.65mL hydrazine hydrate with a mass percentage of 85%; put the polytetrafluoroethylene reactor into the cylinder liner, place it in an oven and heat The reaction was carried out for 3 hours, and after the reaction was completed, cold water at 4° C. was added and cooled to room temperature within 5 minutes to obtain a mother liquor of tellurium nanowires. After extraction with 50 mL of acetone, put it into a vacuum drying oven and dry overnight to obtain 0.5 g of tellurium nanowire product.

[0034] Observing the tellurium nanowire product prepared in Example 1 of the present invention with a transmission electron microscope, the resul...

Embodiment 2

[0036] Add 2.0g of polyvinylpyrrolidone (PVP) (Shanghai Reagent Company, molecular weight ≈40,000) into the lining of a 100mL polytetrafluoroethylene reactor filled with 64mL of deionized water, and mix 2.0g of sodium tellurite ( Na 2 TeO 3 ) Add the above solution and stir evenly, quickly add 6.70mL of 27% by mass ammonia water and 3.30mL of 86% by mass hydrazine hydrate; put the polytetrafluoroethylene reactor into the cylinder jacket, and react at 183°C for 3 hours, After the reaction, cold water at 4° C. was added and cooled to room temperature within 5 minutes to obtain a mother liquor of tellurium nanowires. After extraction with 100 mL of acetone, put it into a vacuum oven and dry overnight to obtain 1 g of tellurium nanowire product.

[0037] Observing the tellurium nanowire product prepared by the embodiment of the present invention 2 with a transmission electron microscope, the results are shown in figure 2 , figure 2 The transmission electron micrograph of the...

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Abstract

The invention provides a macro preparation method for superfine tellurium nanowires, which comprises the following steps that sodium telluride reacts with a reducer by the action of a polyvinylpyrrolidone pH modifier to obtain a reaction mixture, the reaction mixture is rapidly cooled by cold water to obtain tellurium nanowire mother liquid, and a solvent is added to the tellurium nanowire mother liquid for extraction to obtain the tellurium nanowires. According to the macro preparation method, as the obtained reaction mixture is rapidly cooled by the cold water to prepare the tellurium nanowires, the quality of the tellurium nanowires is more uniform, and the diameters of the tellurium nanowires are smaller. Further, as preparation conditions are optimized, the preparation method facilitates synthesis in large quantity, and is easy to promote and apply.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a method for mass preparation of ultrafine tellurium nanowires. Background technique [0002] In recent years, one-dimensional nanomaterials such as nanowires, nanofibers, nanorods, nanobelts, etc., have been widely used in nanoelectronic devices due to their unique electrical, optical, magnetic and other physical and chemical properties. , nanolasers, nanochemical and biological sensors, nanoprobes, nanocomposites, etc. [0003] At present, the synthesis methods of one-dimensional nanomaterials mainly include vapor phase growth synthesis method, gas-liquid-solid method (VLS method), Solution-Liquid-Solid methods (SLS method), solvation thermal synthesis (solvothermal Methods), Solution-Phase Methods Based on Capping Reagents, anisotropic crystal growth method, template method, etc. Among them, telluride has a series of special properties, and there a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02B82Y30/00
Inventor 俞书宏王恺阳源
Owner UNIV OF SCI & TECH OF CHINA
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