Method for preparing octahedral platinoid alloy nanocrystals and octahedral platinoid alloy nanocrystal prepared through adopting same

A platinum-copper alloy and nanocrystal technology, applied in the field of nanomaterials, can solve the problems of complex reaction process and experimental conditions, difficult large-scale production, etc., and achieve the effects of good size uniformity, high repeatability, and easy preparation and storage.

Inactive Publication Date: 2013-10-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods require complex and multi-step reaction processes and strict experimental conditions, and some reactions are difficult to achieve large-scale production

Method used

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  • Method for preparing octahedral platinoid alloy nanocrystals and octahedral platinoid alloy nanocrystal prepared through adopting same
  • Method for preparing octahedral platinoid alloy nanocrystals and octahedral platinoid alloy nanocrystal prepared through adopting same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Equipped with chloroplatinic acid (H 2 PtCl 6 ) and copper chloride (CuCl 2 ) in DMF solution, the concentrations are 0.038mol / L and 0.05mol / L respectively;

[0028] (2) Add 0.18mol / L polyvinylpyrrolidone (PVP) with a molecular weight of 30,000 to 20mL DMF solvent, and dissolve it by ultrasonication for 2-3 minutes;

[0029] (3) Add the prepared chloroplatinic acid and copper chloride solution into (2) the mixed solution, wherein the volume ratio of the copper source solution to the platinum source solution: 6:1, the mixed solution and the DMF solution in step (2) The volume ratio is 1:20, sonicate for 1 to 2 minutes to mix evenly;

[0030] (4) Add the mixed solution obtained in (3) into a hydrothermal kettle with a volume of 40mL, and react at 200°C for 11h;

[0031] (5) Centrifuge the product obtained in (4) at a speed of 12000-13000 rpm for 10 minutes, discard the supernatant, and remove excess PVP;

[0032] (6) Ultrasonic disperse the precipitate obtained i...

Embodiment 2

[0035] (1) Equipped with chloroplatinic acid (H 2 PtCl 6 ) and copper chloride (CuCl 2 ) in DMF solution, the concentrations are 0.045mol / L and 0.03mol / L respectively;

[0036] (2) Add 0.18 mol / l polyethylene glycol (PEG-2000) with a molecular weight of 55,000 into 20 mL of DMF solvent, and dissolve it by ultrasonication for 2-3 minutes;

[0037] (3) Add the prepared potassium platinate and cupric chloride solution into (2) the mixed solution, wherein the volume ratio of the copper source solution to the platinum source solution: 4:1, the ratio of the mixed solution to the DMF solution in step (2) The volume ratio is 1:20, sonicate for 1 to 2 minutes to mix evenly;

[0038] (4) Add the mixed solution obtained in (3) into a hydrothermal kettle with a volume of 40mL, and react at 190°C for 11h;

[0039] (5) Centrifuge the product obtained in (4) at a speed of 12000-13000 rpm for 10 minutes, discard the supernatant, and remove excess PVP;

[0040] (6) Ultrasonic disperse the...

Embodiment 3

[0042] (1) Equipped with potassium chloroplatinate (K 2 PtCl 6 ) and copper chloride (CuCl 2 ) in DMF solution, the concentrations are 0.05mol / L and 0.05mol / L respectively;

[0043](2) Add 0.18mol / l polyethylene glycol with a molecular weight of 2000 to 20ml of DMF solvent, and dissolve it by ultrasonication for 2-3 minutes;

[0044] (3) Add the prepared potassium chloroplatinate and copper chloride solution into (2) the mixed solution, wherein the volume ratio of the copper source solution to the platinum source solution: 3:1, the volume of the mixed solution and the DMF solution in step 2 The ratio is 1:25, ultrasonic 1 ~ 2min to mix evenly;

[0045] (4) Add the mixed solution obtained in (3) into a hydrothermal kettle with a volume of 40mL, and react at 180°C for 11h;

[0046] (5) Centrifuge the product obtained in (4) at a speed of 12000-13000 rpm for 10 minutes, discard the supernatant, and remove excess PEG;

[0047] (6) Ultrasonic disperse the precipitate obtained ...

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PUM

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Abstract

The invention discloses a method for preparing octahedral platinoid alloy nanocrystals. In the method, an N,N-dimethylformamide (DMF) system and appropriate dispersing agent are adopted, other organic modifier and reducing agent are not introduced, only the reducibility of the DMF is utilized, and the hydrothermal reaction for 3-11 h at the temperature of 160-220 DEG C is performed. The preparing method is simple, high in repeatability and low in cost. The invention further discloses an octahedral platinoid alloy nanocrystal obtained and prepared through the method, and the octahedral platinoid alloy nanocrystal is larger in size, excellent in dispersity and easy to store, and the end product can be dispersed in ethyl alcohol and stored.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to an octahedral platinum-copper alloy nanocrystal and a preparation method thereof. Background technique [0002] In recent years, platinum-series nanocrystals have aroused great interest, and their unique catalytic, electrical, and sensing properties enable them to be used in many aspects. However, the high price and limited storage limit its wide application. At present, one of the more successful ways to solve this problem is to use another metal to compound with platinum. This composite nanostructure, on the one hand, can reduce the amount of platinum used, and on the other hand, it will bring better performance than pure platinum. [0003] N,N-Dimethylformamide (DMF) is well known for its excellent properties, including: wide reaction temperature range, excellent chemical and thermal stability, polarity, and good solubility. These properties allow it to be used in many aspects:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B7/10B22F9/24
Inventor 张辉卞婷杜宁杨德仁
Owner ZHEJIANG UNIV
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