Antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode and preparation method thereof

A carbon nanotube composite, tin dioxide technology, applied in chemical instruments and methods, oxidized water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of low electrocatalytic efficiency, short electrode life, etc. Longevity and the effect of enhancing electrocatalytic efficiency

Active Publication Date: 2016-06-29
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of low electrocatalytic efficiency and short electrode life of tin dioxide electrodes in the prior art, the present invention provides an antimony-doped tin dioxide-carbon with high electrocatalytic efficiency, electrocatalysis-adsorption synergy, and long electrode life. Nanotube Composite Adsorptive Electrode

Method used

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  • Antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode and preparation method thereof
  • Antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode and preparation method thereof
  • Antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode and preparation method thereof

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Embodiment 1

[0026] Cut the titanium plate into a size of 1.0cm×3.0cm, and polish the titanium surface with sandpaper until it is smooth; ultrasonically clean the surface to remove oil; then heat in 18% hydrochloric acid solution for 20min to remove the oxide layer; finally put it in deionized water for later use. The treated titanium plate is used as the anode, and the stainless steel plate of the same size is used as the cathode. The control plate is immersed in the electrolyte solution for 2cm, and the distance between the plates is 1.0cm. At the same time, it is stirred rapidly with a magnetic stirrer. Aqueous solution of mol / L potassium fluoride and 0.95mol / L sulfuric acid, control the operating voltage at 20V, take it out after anodizing for 70min, rinse with deionization, and heat up to 500°C at a rate of 1°C / min in a muffle furnace after drying ℃, calcined for 3 hours, and naturally cooled to room temperature to prepare the titanium dioxide nanotube array matrix.

[0027] The titan...

Embodiment 2

[0034] Cut the titanium plate into a size of 1.0cm×3.0cm, and polish the titanium surface with sandpaper until it is smooth; ultrasonically clean the surface to remove oil; then heat in 18% hydrochloric acid solution for 20min to remove the oxide layer; finally put it in deionized water for later use. The treated titanium plate is used as the anode, and the stainless steel plate of the same size is used as the cathode. The control plate is immersed in the electrolyte solution 2cm, and the distance between the plates is 1.0cm. At the same time, it is stirred rapidly with a magnetic stirrer. mol / L sodium fluoride and 1.05mol / L sulfuric acid aqueous solution, control the operating voltage to 20V, take it out after anodizing for 60min, rinse with deionization, and heat up to 450 at a rate of 2°C / min in a muffle furnace after drying ℃, calcined for 5 hours, and naturally cooled to the room to prepare the titanium dioxide nanotube array matrix.

[0035] The titanium-based titanium dio...

Embodiment 3

[0038] The antimony-doped tin dioxide-carbon nanotube composite adsorptive electrode (Ti-NTs / SnO 2 -Sb / CNTs) and titanium-based tin dioxide electrodes (TiO 2 / SnO 2 -Sb) Electrocatalytic degradation effect on phenol (Phenol).

[0039] Prepare 100mL of BA simulated wastewater with a concentration of 100mg / L, and add 0.1M Na 2 SO 4 As the electrolyte, Ti-NTs / SnO 2 -Sb / CNTs and TiO 2 / SnO 2 -Sb electrode as anode, stainless steel as cathode, control current density 30mA / cm 2 , to compare the electrocatalytic oxidation performance of two electrodes for phenol.

[0040] Figure 5 Ti-NTs / SnO of the present invention 2 -Sb / CNTs electrode and TiO 2 / SnO 2 -Sb electrode degradation of phenol removal rate change with the reaction time. It can be seen from the figure that after electrolysis for 3h, Ti-NTs / SnO 2 -Sb / CNTs electrode and TiO 2 / SnO 2 -Sb electrodes have phenol removal rates of 83.2% and 65.7%, respectively, indicating that the prepared Ti-NTs / SnO 2 -Sb / CNTs e...

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Abstract

The invention discloses an antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode and a preparation method thereof.The antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode consists of a titanium dioxide nanotube array substrate, an antimony-doped tin oxide intermediate layer and an antimony-doped tin oxide compound carbon nanotube active layer.A titanium-based titanium dioxide nanotube array is firstly prepared by adopting an anodic oxidation method to serve as a substrate material, the antimony-doped tin oxide intermediate layer is prepared by adopting a sol-gel method, and finally the carbon nanotube compounded antimony /tin oxide active layer is prepared by adopting a pulse electrodeposition method, and the antimony-doped tin oxide-carbon nanotube compounded adsorptive electrode is obtained.By utilizing the high specific surface area of carbon nanotubes and introducing an antimony/tin dioxide composite material, the electric catalysis efficiency of the electrode is greatly improved, so that the electrode has the synergic effect of electric catalysis-adsorption.In addition, tin-antimony and antimony-tin intermediate layer doped in the carbon nanotubes form a eutectoid, the service life of the electrode is prolonged, and the electrode has a great application value in the field of electrochemical catalysis.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrodes, in particular to an antimony-doped tin dioxide-carbon nanotube composite adsorptive electrode and a preparation method thereof. Background technique [0002] Refractory organic wastewater has caused serious environmental pollution, and traditional water treatment processes cannot completely remove it from the water environment. Electrochemical oxidation has attracted widespread attention due to its high efficiency and environmental friendliness. The electrochemical oxidation method mainly uses electrons as reagents, does not need to add additional redox agents, and avoids the secondary pollution caused by the addition of additional agents. The reaction conditions are mild and the operation is simple. It is an energy-saving and environmentally friendly technology. The electrochemical reaction occurs on the surface of the anode plate. The characteristics of the anode largely de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/46C02F1/72C02F101/30
CPCC02F1/46C02F1/46109C02F1/725C02F2101/30
Inventor 韩卫清刘思琪周解臻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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