Method for preparing antimony-doped tin dioxide aerogel three-dimensional electrode through normal pressure drying

A tin dioxide, atmospheric drying technology, used in gel electrodes, battery electrodes, active material electrodes, etc., can solve the problems of high energy consumption, brittleness, high risk, and achieve low energy consumption, developed pore structure, The effect of high safety

Active Publication Date: 2016-04-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the disadvantages of high energy consumption, high risk and fragility in water in the preparation of antimony-doped tin dioxide airgel in the prior

Method used

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  • Method for preparing antimony-doped tin dioxide aerogel three-dimensional electrode through normal pressure drying
  • Method for preparing antimony-doped tin dioxide aerogel three-dimensional electrode through normal pressure drying
  • Method for preparing antimony-doped tin dioxide aerogel three-dimensional electrode through normal pressure drying

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dissolve tin tetrachloride pentahydrate in ethanol to prepare 0.6mol / L tin tetrachloride alcohol solution; dissolve ammonium fluoride in water to prepare 7mol / L ammonium fluoride aqueous solution. Stir the tin tetrachloride alcohol solution in a water bath at 60°C for 5 hours, and add the ammonium fluoride aqueous solution dropwise when the stirring starts, and the molar ratio of fluorine to tin is 1:1. Dissolve antimony trichloride in hydrochloric acid to prepare a 2mol / L hydrochloric acid solution, mix it with the stirred tin chloride alcohol solution, and the molar ratio of antimony to tin is 0.15:1. After mixing, a small amount of precipitate precipitated in the solution, filtered off the precipitate, took the supernatant and added propylene oxide in an ice bath, the molar ratio of propylene oxide and tin was 11:1, and reacted in a sealed glass bottle for 20 minutes to obtain antimony Alcohol gel doped with tin dioxide. The obtained alcohol gel was soaked in ethano...

Embodiment 2

[0034]Dissolve tin tetrachloride pentahydrate in propanol to prepare a 0.5 mol / L tin tetrachloride alcohol solution; stir the tin tetrachloride alcohol solution in a 60°C water bath for 5 hours. Dissolve ammonium fluoride in water to prepare a 5mol / L ammonium fluoride aqueous solution. Stir the tin tetrachloride alcohol solution in a water bath at 60°C for 5 hours, and add the ammonium fluoride aqueous solution dropwise when the stirring starts, and the molar ratio of fluorine to tin is 0.5:1. Dissolve antimony trichloride in hydrochloric acid to prepare a 1mol / L hydrochloric acid solution, mix it with the stirred tin chloride alcohol solution, and the molar ratio of antimony to tin is 0.05:1. After mixing, a small amount of precipitate precipitated in the solution, filtered off the precipitate, took the supernatant and added propylene oxide in an ice bath, the molar ratio of propylene oxide and tin was 11:1, and reacted in a sealed glass bottle for 20 minutes to obtain antimo...

Embodiment 3

[0036] Dissolve tin tetrachloride pentahydrate in methanol to prepare 1mol / L tin tetrachloride alcohol solution; dissolve ammonium fluoride in water to prepare 10mol / L ammonium fluoride aqueous solution. Stir the tin tetrachloride alcohol solution in a water bath at 60°C for 5 hours, and add the ammonium fluoride aqueous solution dropwise when the stirring starts, and the molar ratio of fluorine to tin is 1:1. Dissolve antimony trichloride in hydrochloric acid to prepare a 2mol / L hydrochloric acid solution, mix it with the stirred tin chloride alcohol solution, and the molar ratio of antimony to tin is 0.2:1. After mixing, a small amount of precipitate precipitated in the solution, filtered off the precipitate, took the supernatant and added propylene oxide in an ice bath, the molar ratio of propylene oxide and tin was 25:1, and reacted in a sealed glass bottle for 20 minutes to obtain antimony Alcoholic gel doped with tin dioxide. The obtained alcohol gel was soaked in ethan...

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Abstract

The invention discloses a method for preparing an antimony-doped tin dioxide aerogel three-dimensional electrode through normal pressure drying and belongs to the technical field of electrocatalytic electrode preparation, and by means of the method, electrocatalytic oxidation efficiency of traditional two-dimensional electrodes is improved. The method comprises the steps of firstly, preparing antimony-doped tin dioxide aerogel through a sol-gel method, then conducting methyl silanization with tetraethoxysilane, replacing hydroxy on the surface of alcogel with silicon oxygen bond, forming a silicon oxide frame structure among tin oxide oligomer, and conducting solvent exchange, normal pressure drying and calcination to obtain the antimony-doped tin dioxide aerogel which is of a mesoporous structure and large in specific surface area. The antimony-doped tin dioxide aerogel prepared through the method has a three-dimensional network structure formed by crosslinking of nanoparticles and is high in specific surface area and large in number of electrochemical activity points, the defects that aerogel prepared through a supercritical drying method is high in energy consumption and dangerousness, easy to break in water and the like are overcome, and high application value is achieved in the electrochemical catalysis field.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode preparation, and in particular relates to a method for preparing an antimony-doped tin dioxide three-dimensional electrode by drying under normal pressure. Background technique [0002] Due to its unique advantages such as high efficiency and environmental friendliness, electrochemical oxidation has attracted extensive attention in the field of refractory organic wastewater treatment. Traditional two-dimensional electrodes have defects such as short electrode life and low current efficiency, and due to the limitations of mass transfer speed and space-time efficiency, these problems are difficult to solve in traditional two-dimensional electrode systems. The three-dimensional electrode is filled with particles or other debris-like working electrode materials between the electrodes of the two-dimensional electrolyzer, and electrochemical reactions can occur on the surface. Compar...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCH01M4/8882H01M2004/023Y02E60/10Y02E60/50
Inventor 韩卫清刘思琪徐安琳孙秀云刘晓东李健生沈锦优王连军
Owner NANJING UNIV OF SCI & TECH
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