Method for synthesizing high-performance metallic materials in low-temperature liquid phase

A technology of metal materials and low-temperature liquid phase, which is applied in the fields of materials science, engineering technology and chemistry, can solve the problems of low reliability and inability to greatly increase production, and achieve the effect of easy operation and simple process

Inactive Publication Date: 2018-12-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method is to control the nucleation by infinitely reducing the solution concentration, which not only has low reliability, but also cannot greatly increase the yield

Method used

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  • Method for synthesizing high-performance metallic materials in low-temperature liquid phase

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] atomically dispersed Ag 1 / TiO 2 Preparation of composite materials.

[0014] First, the water / ethanol mixed solution with a volume ratio of 1:9 is configured as antifreeze: 0.02M AgNO 3 Reaction solution A and containing 5.0M N 2 h 5 Titanium dioxide P25 carrier dispersion of OH reducing agent (2.5mg ml -1 ). Next, the above-mentioned solution and dispersion liquid were placed in a low-temperature box, the temperature was lowered to minus 60° C., and the temperature was maintained for 30 minutes. With syringe pump control, 5ml AgNO 3 Reaction solution A with 0.5ml min -1 Add it dropwise to 125mL of the reducing agent-carrier mixed dispersion at a rate of After the mixed liquid was continuously stirred and reacted at minus 60° C. for 2 hours, it was recovered and cleaned by low-temperature vacuum filtration, and dried naturally at room temperature. Atomically dispersed Ag can be obtained 1 / TiO 2 composite material.

Embodiment 2

[0016] atomically dispersed Ag 1 / TiO 2 Preparation of composite materials.

[0017] First, the water / tetrafluorohydrofuran mixed solution with a volume ratio of 1:9 is used as the antifreeze solution: 0.05M AgNO 3 Reaction solution A and containing 5.0M NaBH 4 Titanium dioxide P25 carrier dispersion of reducing agent (5 mg ml -1 ). Next, the above-mentioned solution and dispersion liquid were placed in a low-temperature box, the temperature was lowered to minus 60° C., and the temperature was maintained for 30 minutes. With syringe pump control, 5ml AgNO 3 The reaction solution A was directly mixed with 125 mL of the reducing agent carrier mixed dispersion liquid. After the mixed liquid was continuously stirred and reacted at minus 60° C. for 2 hours, it was recovered and cleaned by low-temperature vacuum filtration, and dried naturally at room temperature. Atomically dispersed Ag can be obtained 1 / TiO 2 composite material.

Embodiment 3

[0019] atomically dispersed Ag 1 / TiO 2 Preparation of composite materials.

[0020] First, the water / ethanol mixed solution with a volume ratio of 1:9 is configured as antifreeze: 0.05M AgNO 3 Reaction solution A and 5mg ml -1 Titanium dioxide P25 carrier dispersion. Next, the above-mentioned solution and dispersion liquid were placed in a low-temperature box, the temperature was lowered to minus 45° C., and the temperature was maintained for 60 minutes. Introduce UV light to irradiate AgNO 3 Solution A, the light time continued for 2h, and the reacted AgNO 3 Solution A was mixed with 125 mL of the vehicle dispersion. After the mixed liquid was continuously stirred and reacted at minus 45° C. for 2 hours, it was recovered and cleaned by low-temperature vacuum filtration, and dried naturally at room temperature. Atomically dispersed Ag can be obtained 1 / TiO 2 composite material.

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Abstract

The invention relates to a method for synthesizing high-performance metallic materials in a low-temperature liquid phase, and belongs to the field of material science and engineering technology and chemistry. The prepared metallic materials comprises monatomic, diatomic, polyatomic, atomic cluster or ultrafine nanoparticle and other materials composed of one or more metallic elements such as Ti, V, Cr, Mn, Cu, Zr, Nb, Mo, Ru, Rh, Pd, Ag, W, Re, Os, Ir, Pt and Au synthesized chemically in the low-temperature liquid phase.

Description

technical field [0001] The invention relates to a method for synthesizing high-performance materials such as metal single atoms, diatoms, polyatoms, atomic clusters or ultrafine nanoparticles in low-temperature liquid phase, and belongs to the fields of material science and engineering technology and chemistry. Background technique [0002] As important inorganic substances, metals account for more than two-thirds of the elements in the periodic table, and possess rich and fascinating physical and chemical properties. Many metal materials have been widely used in catalysis, electronics, optical imaging, information storage, sensing, medicine and other fields. To study the surface, the performance of metal materials is closely related to a series of physical parameters such as size, shape, fullness and structure. Precise control of related parameters is very important in the process of preparing high-performance metal materials. In particular, metal atoms are the active site...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/054
Inventor 伍晖黄凯郎嘉良魏呵呵
Owner TSINGHUA UNIV
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