Preparation method of reactive porous Sn-Bi electrode, as well as porous Sn-Bi electrode and application thereof

A reactive, porous and conductive technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of low degradation efficiency of organic matter, overcome easy cracking and deformation, improve electrocatalytic performance, and solve the problem of electrical conductivity poor sex effect

Active Publication Date: 2019-05-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above problems. The present invention provides a reactive porous tin-bismuth electrode and its preparation method and application. The electrode can be used as a coupling system for adsorption, membrane filtration and electrocatalysis, and can not only solve the Oxidation process has the problem of low degradation efficiency of organic matter due to mass transfer limitation, and the preparation method has simple process, low cost and no secondary pollution

Method used

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  • Preparation method of reactive porous Sn-Bi electrode, as well as porous Sn-Bi electrode and application thereof
  • Preparation method of reactive porous Sn-Bi electrode, as well as porous Sn-Bi electrode and application thereof
  • Preparation method of reactive porous Sn-Bi electrode, as well as porous Sn-Bi electrode and application thereof

Examples

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Embodiment 1

[0031] Example 1 A reactive porous tin-bismuth electrode X1 and its preparation method

[0032] Its preparation method comprises the following steps:

[0033] Step 1: Etching pretreatment of porous titanium conductive substrate

[0034] Boil porous titanium with a length of 50mm, a width of 20mm, a thickness of 2mm, and a pore size of 30μm in 10% sodium hydroxide solution and 10% oxalic acid solution for 30 minutes, etch until a gray pitted titanium matrix is ​​formed, take it out and wash it with nitrogen blow dry.

[0035] Step 2: Configure tin-bismuth sol

[0036] Measure 200mL of ethylene glycol, add a certain amount of citric acid, stir and dissolve at 60°C, then add SnCl to the solution 4 4H 2 O and Bi(NO 3 ) 3 ·5H 2O, after raising the temperature to 90°C and maintaining it for 30 minutes, a mixed solution of tin and bismuth was formed. Add 0.5% (g / mL) PVA to the tin-bismuth mixture and keep stirring to obtain a colorless transparent or slightly yellow sol after...

Embodiment 2

[0040] Example 2 A reactive porous tin-bismuth electrode X2 and its preparation method

[0041] Its preparation method comprises the following steps:

[0042] The first step: porous carbon conductive substrate etching pretreatment

[0043] Porous carbon with a diameter of 15 mm, a thickness of 2 mm, a length of 8 mm, and an average pore diameter of 10 μm was etched in 10% nitric acid solution for 30 min, and then cleaned and dried with nitrogen gas after taking it out.

[0044] Step 2: Configure tin-bismuth sol

[0045] Measure 200mL of ethylene glycol, add a certain amount of citric acid, stir and dissolve at 60°C, then add SnCl to the solution 4 4H 2 O and Bi(NO 3 ) 3 ·5H 2 After O was heated to 90°C and kept for 30 min, a mixture of tin and bismuth was formed. Add 0.1% (g / mL) PVB to the tin-bismuth mixture, and obtain a colorless transparent or slightly yellow sol after cooling, which is the polymer-tin-bismuth composite precursor. The compound ratio is citric acid:...

Embodiment 3

[0049] Example 3 A reactive porous tin-bismuth electrode X3 and its preparation method

[0050] Its preparation method comprises the following steps:

[0051] Step 1: Etching pretreatment of porous titanium conductive substrate

[0052] Boil a tubular porous titanium substrate with a length of 30 mm, a thickness of 1 mm, an outer diameter of 15 mm, and a pore diameter of 50 μm in 10% NaOH solution and 10% oxalic acid solution for 30 minutes, etch until a gray pockmarked titanium substrate is formed, take it out and wash it for use Blow dry with nitrogen.

[0053] Step 2: Configure tin-bismuth sol

[0054] Measure 200mL of ethylene glycol, add a certain amount of citric acid, stir and dissolve at 60°C, then add SnCl to the solution 4 4H 2 O and Bi(NO 3 ) 3 ·5H 2 After O was heated to 90°C and kept for 30 min, a mixture of tin and bismuth was formed. Add 3% (g / mL) PVA to the tin-bismuth mixture and keep stirring, and after cooling, a colorless, transparent or slightly ye...

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Abstract

The invention relates to a preparation method of a reactive porous Sn-Bi electrode, as well as the porous Sn-Bi electrode and application thereof. The preparation method comprises the following steps:carrying out etching pretreatment on a porous conducting substrate; preparing an Sn-Bi mixed solution; adding a high molecular polymer in the Sn-Bi mixed solution, thus preparing a high molecular- Sn-Bi composite precursor, wherein a mass-volume ratio of the adding amount of the high molecular polymer to the volume of the Sn-Bi mixed solution is 0.001 to 0.03 g/mL; immersing the porous conductingsubstrate in the high molecular- Sn-Bi composite precursor, and loading an Sn-Bi composite film on the porous conducting substrate by utilizing a wet chemistry method, thus forming an electrode preliminary body; carrying out thermal treatment on the electrode preliminary body, thus preparing the reactive porous Sn-Bi electrode. The reactive porous Sn-Bi electrode disclosed by the invention is applied to an electrochemical filter system, has multiple functions of electrochemical oxidation, adsorption and film filtering, and is capable of effectively solving the problem of mass transfer limitation of the electrochemical oxidation.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode preparation, and in particular relates to a preparation method of a reactive porous tin-bismuth electrode, a porous tin-bismuth electrode and applications thereof. Background technique [0002] With the vigorous development of modern industry, various organic compounds continue to pour into water bodies, especially the organic wastewater produced by chemical, pharmaceutical and other industries, causing serious pollution to water bodies. A considerable part of the organic matter has stable physical and chemical properties, and it is difficult to effectively treat it by conventional physicochemical and biological methods. The electrochemical oxidation method has the advantages of strong oxidation, flexible and controllable process, no need to add chemical agents, and easy systemization. It is an environmentally friendly application technology with great development prospects for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/30
Inventor 谢汝桢蒋文举王晖邓怡陈怡
Owner SICHUAN UNIV
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