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A method for in-situ growth of bismuth nanoparticles on oxide substrates

An in-situ growth, oxide technology, applied in solid-state chemical plating, metal material coating process, coating and other directions, can solve problems such as unseen

Inactive Publication Date: 2014-10-01
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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  • A method for in-situ growth of bismuth nanoparticles on oxide substrates
  • A method for in-situ growth of bismuth nanoparticles on oxide substrates

Examples

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Embodiment 1

[0014] This example provides a kind of SrBi prepared in molten salt method 2 Ta 2 o 9 The method for 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 method, the specific steps are as follows:

[0015] Preparation of SrBi by Molten Salt Method 2 Ta 2 o 9 :

[0016] Weigh the Sr(NO 3 ) 2 ?4H 2 O0.6277g, Bi 2 o 3 1.3820g, Ta 2 o 5 1.3105g, 1.3744g of NaCl and 1.6133g of KCl were ground in an agate mortar for 2 hours to make them evenly mixed, then put the ground powder into a porcelain boat, and fired in air at a temperature of 850°C for 3 hours in a tube furnace Cool down to room temperature with the furnace, add deionized water to wash, filter, remove NaCl and KCl, and then use AgNO 3 Check the solution after washing until no precipitation is formed, and finally dry it in an oven at a temperature of 100°C ...

Embodiment 2

[0023] This example provides a kind of CaBi prepared by solid phase method 2 Nb 2 o 9 The method of growing bismuth metal nanoparticles in situ is to use photochemical method to realize CaBi 2 Nb 2 o 9 The method for preparing bismuth metal nanoparticles by in situ reduction of trivalent bismuth in the method, 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 2 hours to make it evenly mixed, and then press the ground powder into a disk with a diameter of 10mm and a thickness of 1-2mm under a pressure of 8 MPa and 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 cooling down to room temperature naturally, take the sample out and continue grinding for 0.5 hours, and then press it into a disc with a diameter of 10mm and a thickness of 1-2mm u...

Embodiment 3

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

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

[0034] Weigh out BaCO 3 0.5579g, Bi 2 o 3 1.3173g and Ta 2 o 5 1.2493g, grind it in an agate mortar for 2 hours to make it evenly mixed, and then press the ground powder into a disk with a diameter of 10mm and a thickness of 1-2mm under a pressure of 8MPa, then put it into a porcelain boat, use a tube Pre-fire in the air at a temperature of 900°C for 15 hours in a type furnace. After cooling down to room temperature naturally, take out the sample and continue grinding for 0.5 hours, and then press it into a disc with a diameter of 10mm and a thickness of 1-2m...

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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 the oxide substrate by using a photochemical method. Background technique [0002] Metal nanoparticles have unique physical and chemical properties and have broad application prospects in catalysis, optoelectronic devices, magnetic materials, coating materials and other fields, so their preparation has been extensively studied. Various gas-phase and liquid-phase-based methods have been used for the preparation of metal nanoparticles, but so far, there are 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: mild reaction conditions can be carried out at room temperature; green environmental protection can be achieved only...

Claims

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Application Information

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Patent Type & Authority Patents(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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