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a superfine ruo 2 Preparation method of nanoparticles

A nanoparticle, P123 technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of stable structure, adjustable particle size, and high specific surface area

Active Publication Date: 2017-01-18
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently using SiO 2 Preparation of Ultrafine RuO by Hard Template Method 2 Nanoparticles have not been reported in the literature

Method used

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  • a superfine ruo <sub>2</sub> Preparation method of nanoparticles
  • a superfine ruo <sub>2</sub> Preparation method of nanoparticles
  • a superfine ruo <sub>2</sub> Preparation method of nanoparticles

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Embodiment 1

[0023] 1. Dissolve 5g of P123 and 1mL of 1M HCl solution in 25g of ethanol, stir well to dissolve, add 10.4g of ethyl orthosilicate, and stir for 10 minutes with a magnet.

[0024] 2. Pour the above solution into a 6cm evaporating dish, put it in a cupboard, and let it stand for 48 hours.

[0025] 3. Pour 2-3mm thick liquid paraffin into the evaporating dish, put it into the blast drying oven, 90 degrees, and dry for 12 hours.

[0026] 4. Take the block out from the evaporating dish, and wipe off the liquid paraffin on the surface with filter paper.

[0027] 5. Anneal the above block at 900°C in air with a heating rate of 2°C / min for 1 hour to obtain mesoporous SiO 2 template.

[0028] 6. Put these hard templates in a 5cm petri dish, add 0.2mL of RuCl3 ethanol solution dropwise (every 5-7mL solution can contain 0.38g Ru element), wait until the ethanol is completely volatilized, continue to drop; repeatedly drop 5 Second-rate.

[0029] 7. Fill the RuCl 3 The template was ...

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Abstract

The invention provides a preparation method of ultrafine RuO2 nanoparticles. The method includes: mixing a surfactant P123, 1M hydrochloric acid and ethanol according to a mass ratio of 1:0.1-0.3:3-7, then adding 2-2.5 by mass of tetraethyl orthosilicate, and conducting stirring to obtain an initial solution; pouring the initial solution into an evaporation dish, performing standing for 36-48h, hydrolyzing tetraethyl orthosilicate to form silicon dioxide filling soft template gaps; standing ethanol to volatilize so as to obtain a block; annealing the obtained silicon dioxide block; putting the obtained SiO2 template in a culture dish, adding RuCl3's ethanol solution containing 0.38g Ru in per 5-7mL solution to the SiO2 template, i.e. a hard template, conducting annealing at 300-600DEG C in air, performing soaking in excess HF with a concentration of over 8wt%, removing the SiO2 template, conducting cleaning with deionized water, and performing drying, thus obtaining the ultrafine RuO2 nanoparticles.

Description

technical field [0001] The invention relates to the technical field of materials for supercapacitors and lithium-air batteries, in particular to an ordered porous structure RuO 2 Materials and their preparation methods. Background technique [0002] RuO 2 In the field of supercapacitors and lithium-air batteries, it has an important role and excellent performance. RuO 2 When used as an electrode material for a supercapacitor, it has a very high specific capacitance (768F / g), and is currently one of the most ideal electrode materials for a supercapacitor. [0003] As an electrode material for lithium-air batteries, RuO 2 It can exhibit excellent electrocatalytic activity and can effectively reduce the overvoltage of the battery. [0004] If the RuO 2 The nanostructure can increase the specific surface area of ​​the material, thereby increasing the contact area between the material and the electrolyte. For supercapacitors, a high specific surface area can effectively in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G55/00B82Y30/00
Inventor 郑明波林子夏施毅赵斌濮琳
Owner NANJING UNIV
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