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A three-dimensional composite channel antimony-doped tin dioxide electrode and its preparation method and application

A tin dioxide, three-dimensional composite technology, applied in chemical instruments and methods, oxidized water/sewage treatment, electrochemical water/sewage treatment, etc. The improvement of catalytic oxidation ability is limited, etc., to achieve the effects of increased contact, cheap raw materials, and simple preparation methods

Active Publication Date: 2018-08-28
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Improving the composition and structural form of the tin dioxide electrode is conducive to improving the electrocatalytic performance of the electrode. The existing improvement method is basically to improve the structural form of the tin dioxide electrode into a porous structure, mostly a two-dimensional porous structure, and its specific surface area , Impedance and electrocatalytic oxidation ability have limited improvement, often there are limitations such as pollutant concentration polarization, and the mass transfer and diffusion performance has not been effectively improved

Method used

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  • A three-dimensional composite channel antimony-doped tin dioxide electrode and its preparation method and application
  • A three-dimensional composite channel antimony-doped tin dioxide electrode and its preparation method and application
  • A three-dimensional composite channel antimony-doped tin dioxide electrode and its preparation method and application

Examples

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Embodiment example 1

[0024] A three-dimensional composite channel antimony-doped tin dioxide electrode, the specific preparation is as follows (1) Clean the surface of the titanium material as the bottom layer, and then add 0.05 mol / L hydrogen fluoride, 0.05 mol / L potassium fluoride and 0.1 mol / L Carry out anodic oxidation in a mixed solution of L sulfuric acid for 60 minutes, the operating voltage is 25V, take out and wash, heat and roast at 500°C for 4 hours, control the heating rate to 2°C / min, and obtain the titanium dioxide nanotube intermediate layer. (2) The prepared titanium-based titania nanotubes were immersed in 0.2% polymethyl methacrylate (PMMA) microsphere suspension, and dried in an oven at 45°C to obtain titanium-based titania nanotubes assembled with PMMA templates . (3) The titanium-based titania nanotubes assembled with PMMA templates were impregnated with a triblock copolymer composed of 0.5 mol / L tin tetrachloride, 0.03 mol / L antimony trichloride, 0.05 mol / L citric acid and 4 ...

Embodiment example 2

[0026] A three-dimensional composite channel antimony-doped tin dioxide electrode, the specific preparation is as follows (1) Clean the surface of the titanium material as the bottom layer, and then add 0.1 mol / L hydrogen fluoride, 0.01 mol / L sodium fluoride and 0.05 mol / L Carry out anodic oxidation in a mixed solution of L sulfuric acid for 30 minutes, the operating voltage is 20V, take out and wash, heat and roast at 450°C for 3 hours, and control the heating rate to 1°C / min to obtain the titanium dioxide nanotube intermediate layer. (2) The prepared titanium-based titania nanotubes were immersed in 0.05% polymethyl methacrylate (PMMA) microsphere suspension, and dried in an oven at 40°C to obtain titanium-based titania nanotubes assembled with PMMA templates . (3) The titanium-based titania nanotubes assembled with PMMA templates were impregnated with a triblock copolymer of 0.2 mol / L tin tetrachloride, 0.01 mol / L antimony trichloride, 0.02 mol / L citric acid and 1 mmol / L I...

Embodiment example 3

[0028] A three-dimensional composite channel antimony-doped tin dioxide electrode, the specific preparation is as follows (1) Clean the surface of the titanium material as the bottom layer, and then add 0.01mol / L hydrogen fluoride, 0.1 mol / L sodium fluoride and 0.15mol / L Carry out anodic oxidation in a mixed solution of L hydrochloric acid for 90 minutes, the operating voltage is 30V, take out and wash, heat and roast at 550°C for 5 hours, and control the heating rate to 3°C / min to obtain the titanium dioxide nanotube intermediate layer. (2) The prepared titanium-based titania nanotubes were immersed in 0.5% polystyrene (PS) microsphere suspension, and dried in an oven at 50°C to obtain titanium-based titania nanotubes assembled with PS templates. (3) The titanium-based titania nanotubes assembled with PMMA templates were impregnated in a triblock copolymer composed of 0.8 mol / L tin tetrachloride, 0.05 mol / L antimony trichloride, 0.08 mol / L citric acid and 8 mmol / L Immerse in th...

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Abstract

The invention discloses a three-dimensional combined-duct antimony-doped tin dioxide electrode and a preparation method and application thereof. In this electrode, a titanium base is used as a bottom layer, titanium dioxide nanotubes are then generated to form an intermediate layer, PMMA or PS microspheres are used as a hard template, precursor ethanol solution is formed with tin tetrachloride, antimony trichloride, citric acid and triblock copolymer, and three-dimensional macroporous antimony-doped tin dioxide with macroporous walls is made by calcining as a surface layer. The electrode prepared herein has an internally-communicated pore system, three-dimensional structure advantages of macropores and mesopores are given to full play, synergy will be created, this electrode has the advantages of low impedance, large specific surface area, high electrocatalytic activity and high electrocatalytic oxidative performance, and organic pollutants difficult to degrade can be degraded efficiently.

Description

technical field [0001] The invention relates to a three-dimensional compound channel antimony-doped tin dioxide electrode and its preparation method and application, belonging to the field of electrocatalytic electrodes and electrocatalytic degradation of organic pollutants. Background technique [0002] The discharge of wastewater containing refractory organic pollutants will cause serious environmental pollution. Since the efficiency of direct oxidation of strong oxidants cannot meet the treatment requirements stably, people have to seek more effective oxidation treatment technologies to meet the needs. Electrocatalytic oxidation is a form of advanced oxidation. It uses clean electric energy to provide electrons, that is, electrons are used as catalysts, and functional electrodes are used to generate hydroxyl radicals with the highest oxidation potential. Catalytic degradation of organic compounds such as rings. Titanium dioxide and tin dioxide have excellent electrocatal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46C02F1/72
CPCC02F1/4672
Inventor 涂勇陈勇白永刚张耀辉李军
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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