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Method for growing bismuth nanoparticles on oxide substrate in situ

An in-situ growth and oxide technology, applied in solid-state chemical plating, metal material coating process, coating, etc., can solve unseen problems

Inactive Publication Date: 2013-03-27
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the photochemical reduction method is only used to prepare transition metal nanoparticles, and the method of preparing main group metal nanoparticles by photochemical reduction of metal oxides has not been found in the open literature.

Method used

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  • Method for growing bismuth nanoparticles on oxide substrate in situ
  • Method for growing bismuth nanoparticles on oxide substrate in situ

Examples

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Embodiment 1

[0014] This example provides a SrBi prepared in the molten salt method 2 Ta 2 O 9 The method of in-situ growth of bismuth metal nanoparticles is to use photochemical methods to achieve SrBi 2 Ta 2 O 9 The method for preparing bismuth metal nanoparticles by in-situ reduction of trivalent bismuth in, the specific steps are as follows:

[0015] SrBi prepared by molten salt method 2 Ta 2 O 9 :

[0016] Weigh Sr(NO 3 ) 2 ?4H 2 O0.6277g, Bi 2 O 3 1.3820g, Ta 2 O 5 1.3105g, NaCl1.3744g and KCl 1.6133g, grind them in an agate mortar for 2h to make them evenly mixed, then put the ground powder into a porcelain boat, use a tube furnace to burn in the air at a temperature of 850℃ for 3h Cool to room temperature with the furnace, add deionized water to wash, filter, remove NaCl and KCl, and then use AgNO 3 Check the washed solution until there is no precipitation, and finally dry it in an oven at 100℃ for 0.5 hours to obtain SrBi 2 Ta 2 O 9 powder;

[0017] Photochemical reduction of SrBi 2 Ta 2...

Embodiment 2

[0023] This example provides a CaBi prepared by solid phase method 2 Nb 2 O 9 The method of in-situ growth of bismuth metal nanoparticles is to use photochemical methods to achieve CaBi 2 Nb 2 O 9 The method for preparing bismuth metal nanoparticles by in-situ reduction of trivalent bismuth in, the specific steps are as follows:

[0024] Preparation of CaBi by solid phase method 2 Nb 2 O 9 :

[0025] Weigh separately, CaCO 3 0.3811g, Bi 2 O 3 1.7743g, Nb 2 O 5 1.0122g, grind it in an agate mortar for 2h to make it evenly mixed, and then press the ground powder under a pressure of 8 MPa into a disk with a diameter of 10mm and a thickness of 1-2mm, and then put it into a porcelain boat. Use a tube furnace to pre-fire in the air at a temperature of 900°C for 15 hours. After it is naturally cooled to room temperature, take the sample out and continue to grind for 0.5 hours, and then press it into a disc with a diameter of 10mm and a thickness of 1-2mm under a pressure of 8MPa After sin...

Embodiment 3

[0032] This example provides a BaBi prepared in a solid phase method 2 Ta 2 O 9 The method of in-situ growth of bismuth metal nanoparticles is to use photochemical methods to achieve BaBi 2 Ta 2 O 9 The method for preparing bismuth metal nanoparticles by in-situ reduction of trivalent bismuth in, the specific steps are as follows:

[0033] Preparation of BaBi by solid phase method 2 Ta 2 O 9 :

[0034] Weigh BaCO separately 3 0.5579g, Bi 2 O 3 1.3173g and Ta 2 O 5 1.2493g, grind in an agate mortar for 2h to make it evenly mixed, and then press the ground powder into a disc with a diameter of 10mm and a thickness of 1-2mm under a pressure of 8MPa, and then put it in a porcelain boat. The furnace is pre-fired in the air at a temperature of 900℃ for 15h. After it is naturally cooled to room temperature, the sample is taken out and continues to be ground for 0.5h, and then pressed into a disc with a diameter of 10mm and a thickness of 1-2mm under a pressure of 8MPa. After sintering in ...

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Abstract

The invention relates to a method for growing bismuth nanoparticles on an oxide substrate in situ. The method comprises the following steps of: adding a bismuth-contained oxide into an aqueous solution of methanol, ethanol or glucose, wherein the bismuth-contained oxide is prepared by using a molten salt method or high-temperature solid-phase method; and then, irradiating the bismuth-contained oxide under ultraviolet light to form the bismuth nanoparticles on the surface of the bismuth-contained oxide, wherein the particle sizes of the bismuth nanoparticles are distributed uniformly. The method has the advantages of mild preparation condition, simple process, low cost and the like; the prepared bismuth nanoparticles are small in particle size and attached to the oxide substrate; the bismuth nanoparticles growing on the oxide substrate in situ by using the method can be used for the nano electron field, the catalytic field and superconducting materials and the like; and the method is simple in process and used for realizing uniform in-situ growth of the bismuth nanoparticles on the surface of the oxide at room temperature through light irradiation.

Description

Technical field [0001] The invention relates to a method for in-situ growth of bismuth nano particles on an oxide substrate, in particular to realize the in-situ growth of bismuth nano particles on an oxide substrate by using a photochemical method. Background technique [0002] Metal nanoparticles have unique physical and chemical properties and have broad application prospects in the fields of catalysis, optoelectronic devices, magnetic materials, coating materials, etc. Therefore, their preparation has been extensively studied. Various methods based on gas and liquid phases are used for the preparation of metal nanoparticles, but so far, there are relatively few reports on the preparation of metal nanoparticles by direct reduction of metal oxides at room temperature. [0003] Photochemical methods have some advantages in the preparation of metal nanoparticles, such as: reaction conditions can be carried out at room temperature under mild conditions; environmental protection can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/20C23C20/04
Inventor 李英宣王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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