Method for synthesizing molybdenum dioxide-carbon composite nano-wire

A molybdenum dioxide and synthesis method technology, applied in the field of nanomaterials, can solve problems such as low yield and cumbersome operation, and achieve the effects of high product quality and yield, high preparation efficiency, and adjustable length

Inactive Publication Date: 2009-03-11
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned methods are all inorganic nanomaterials of moly...

Method used

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Embodiment 1

[0044] A method for synthesizing molybdenum dioxide-carbon composite nanowires, comprising the steps of:

[0045] (1) 1.24g ammonium molybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O is dissolved in 20mL distilled water to obtain ammonium molybdate solution (molar molar concentration of molybdenum is about 0.35mol / L);

[0046] (2) Inject 1.73g of aniline into the ammonium molybdate solution (the molar ratio of aniline to molybdenum atoms is about 2.65:1);

[0047] (3) Add 1.0 mol / L hydrochloric acid dropwise to the solution, adjust the pH to 4-5, until a white precipitate appears, and prepare a reaction solution;

[0048] (4) The reaction solution was transferred to an oil bath at 50° C., and reacted for 6 hours to obtain the product;

[0049] (5) The product was washed several times with absolute ethanol, filtered with suction, and dried at 50°C;

[0050] (6) Finally, the product was calcined in an argon flow at a calcining temperature of 575° C. for a calcining time of 5 hours to ob...

Embodiment 2

[0056] A method for synthesizing molybdenum dioxide-carbon composite nanowires, comprising the steps of:

[0057] (1) ammonium molybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O is dissolved in 20mL distilled water to obtain ammonium molybdate solution (molar concentration of molybdenum atoms is 0.01mol / L);

[0058] (2) Inject aniline into the ammonium molybdate solution (the molar ratio of aniline to molybdenum atoms is 4.0-2.0:1);

[0059] (3) Add 1.0 mol / L hydrochloric acid dropwise to the solution, adjust the pH to 4-5, until a white precipitate appears, and prepare a reaction solution;

[0060] (4) The reaction solution was transferred to an oil bath at 50° C., and reacted for 6 hours to obtain the product;

[0061] (5) The product was washed several times with absolute ethanol, filtered with suction, and dried at 50°C;

[0062] (6) Finally, the product was calcined in an argon flow at a calcining temperature of 575° C. and a calcining time of 5 hours to obtain a molybdenum diox...

Embodiment 3

[0064] A method for synthesizing molybdenum dioxide-carbon composite nanowires, comprising the steps of:

[0065] (1) ammonium molybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O is dissolved in 20mL distilled water to obtain ammonium molybdate solution (molar concentration of molybdenum atoms is 2.0mol / L);

[0066] (2) Inject aniline into the ammonium molybdate solution (the molar ratio of aniline to molybdenum atoms is 4.0-2.0:1);

[0067] (3) Add 1.0 mol / L hydrochloric acid dropwise to the solution, adjust the pH to 4-5, until a white precipitate appears, and prepare a reaction solution;

[0068] (4) The reaction solution was transferred to an oil bath at 50° C., and reacted for 6 hours to obtain the product;

[0069] (5) The product was washed several times with absolute ethanol, filtered with suction, and dried at 50°C;

[0070] (6) Finally, the product was calcined in an argon flow at a calcining temperature of 575°C for a calcining time of 5 hours to obtain a molybdenum dioxide...

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Abstract

The invention relates to the technical field of nanometer material and discloses a method for synthesizing a molybdenum dioxide-carbon composite nanowire. The method comprises the following steps: molybdate is dissolved in water; the molar concentration of molybdenum atoms is between 0.01 and 2.0 mol/L; organic amine is injected; the molar ratio of the molybdenum atoms in the organic amine and a molybdate solution is between 10.0:1 and 1.0:1; the solution is dripped with inorganic acid to regulate the PH value of between 3 and 6 till white precipitate occurs; the reaction solution is transferred to an oil bath at the temperature of 30 and 60 DEG C and reacts for 6 to 24 hours; the product is subjected to washing, extraction, filtering, drying and roasting in an inertia atmosphere; the roasting temperature is between 550 and 650 DEG C; and the roasting time is between 2 and 10 hours. The method has the advantages that a one-dimensional composite nanowire is formed and has a carbon composite structure with subnanometer scale, regulable and controllable physicochemical property, large specific surface area and regulable and controllable property of thickness and length; and the method is applied to a lot of fields and has the yield of over 95 percent, simple and easily controllable conditions, has low cost, high preparation efficiency and good application and industrialization prospect.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for synthesizing molybdenum dioxide-carbon composite nanowires. Background technique [0002] Molybdenum dioxide is an important functional material, which has a wide range of uses in photoluminescent materials, electrode materials, catalysis, sensing and other fields (H.Shinohara, Appl.Catal.1986, 24, 17; N.Okamoto, Y.Kobayashi , O.Terasaki, T.Kodaira, T.Kubota, Phys.Chem.Chem.Phys.2002, 4 2852; L.C.Yang, Q.S.Gao, Y.H.Zhang, Y.Tang, Y.P.Wu, Elec trochem.Comm.2008, 10 , 118; M.Shiono.Japan Patent, JP 04,05,561 [92,05,561], 1992; K.Yoshi da, M.Wada, Y.Takahashi, and E.Hasegawa, Ger.Offen.DE 3,336,445 , 1984; J. J. Auborn, Y. L. Barberio, J. Electrochem. Soc. 1987, 134, 638.). The one-dimensional nano-topography strengthens the above-mentioned properties of molybdenum dioxide due to its high external area and good assembly performance. For exampl...

Claims

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Application Information

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IPC IPC(8): C01G39/02C01B31/02
Inventor 唐颐高庆生张亚红
Owner FUDAN UNIV
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