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Processing method for enhancing electrochemical performances of TiO2 electrode

A treatment method, electrochemical technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of unstable doping effect, long operation time, high cost, etc., to enhance electrochemical performance and photoelectric performance, improve Conductivity, effect of increasing surface roughness

Active Publication Date: 2013-08-28
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of reinforced TiO 2 The method for processing the electrochemical performance of electrodes is used to solve the problems of high cost, cumbersome operation, long operation time and unstable doping effect of the doping method in the prior art

Method used

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  • Processing method for enhancing electrochemical performances of TiO2 electrode
  • Processing method for enhancing electrochemical performances of TiO2 electrode
  • Processing method for enhancing electrochemical performances of TiO2 electrode

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Embodiment 1

[0026] TiO prepared by constant voltage anodization 2 electrode and TiO 2 The electrode is processed, the specific steps are as follows:

[0027] First, two pieces of Ti foils were provided, and the Ti foils were annealed in air at 450°C for 20 minutes to relieve the stress in the Ti foils, and then the Ti foils were ultrasonically cleaned with acetone, ethanol and water for 10 minutes; then, the Ti foils were As the anode, the carbon rod is the counter electrode, and the electrolyte is 0.5wt%NH 4 F and 2vol%H 2 O in ethylene glycol solution, in this system, the anode is oxidized at a constant voltage of 60V for 2 hours to form a primary oxide film, and then the primary oxide film is removed by ultrasonication for 30 minutes, and the pitted Ti is cleaned with acetone, ethanol and water in sequence. Foil; perform secondary oxidation under the same conditions as the primary oxidation, take out the Ti foil and rinse it with deionized water after completion, dry it and place it...

Embodiment 2

[0036] Preparation of TiO by Hydrothermal Method 2 For the electrode, mix 0.4g of P25 powder and 8mol / L (15mL) of KOH solution evenly, stir for 20min and then transfer it into a polytetrafluoroethylene-lined autoclave, seal the autoclave and place it in an oven at 140°C ,After 24 hours at constant temperature, the milky white colloid was obtained, which was applied to the cleaned conductive glass, and the coating area was 1.2cm 2 , after coating, rinse with deionized water and dry; then, the prepared TiO 2 The electrode was placed in a tube furnace for annealing and crystallization for 2 hours at an annealing temperature of 450°C; secondly, N 2 Plasma treated TiO 2 Electrode, the gas flow rate is 200sccm, the system pressure is 50Pa, the system temperature is 320°C, and the power of the RF power supply is 40mW / cm 2 , The reaction time is 1.5h. Electrode test process is identical with embodiment one, the untreated and treated TiO of obtaining 2 The comparative results of t...

Embodiment 3

[0038] Preparation of TiO by template method 2 Porous alumina AAO with Al substrate for electrode and template (pore diameter 60nm, thickness 20 microns, area 1.2cm 2 ) as a template, using 0.1mol / L (NH 4 ) 2 TiF 6 for the precursor. Immerse the Al-based porous alumina AAO in the solution, take it out after reacting for 1 h, rinse it with deionized water, and dry it; then, the prepared TiO with Al-based 2 Put the electrode into a tube furnace for annealing and crystallization, the annealing temperature is 450°C; secondly, pass H 2 Plasma treated TiO 2 Electrode, the gas flow rate is 100sccm, the system pressure is 50Pa, the system temperature is 25°C, and the power of the RF power supply is 1000mW / cm 2 , The reaction time is 1.5h. Electrode test process is identical with embodiment one, the untreated and treated TiO of obtaining 2 The comparative results of the electrode topography photos, cyclic voltammetry test curves, and impedance test curves are the same as those ...

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Abstract

The invention provides a processing method for enhancing electrochemical performances of a TiO2 electrode, wherein the processing method at least comprises the steps of effectively doping the prepared TiO2 electrode by high-active gas Plasmon, wherein the TiO2 electrode is in a one-dimensional nanostructure. After treatment by the plasma processing method provided in the invention, surface roughness of the one-dimensional nanostructure of the TiO2 electrode is increased, and a specific surface area of the one-dimensional structure is raised. Plasma partially doped and reduced TiO2, reduces energy gaps of material, and raises conductivity and visible light response performances, thereby effectively enhancing electrochemical performance and photoelectric performance of the material, and enables the TiO2 nano-material to be better and more widely applied in the fields of a super capacitor, a lithium ion battery, a solar cell and a photoelectrocatalysis material.

Description

technical field [0001] The invention relates to the field of photoelectrochemical electrode materials, in particular to an enhanced TiO 2 Treatment methods for electrode electrochemical performance. Background technique [0002] TiO 2 Due to the advantages of low cost, semiconductor properties and stable chemical properties, it has attracted the interest of many researchers, and has been widely used in solar cells, photocatalysis, sensors, biomedicine and other fields. In recent years, the problem of energy shortage has become increasingly prominent, and the time to solve the energy crisis cannot wait. Therefore, searching for cheap energy storage materials and clean energy has become a research hotspot. But TiO 2 The applications in energy storage devices and photocatalytic hydrogen production are limited, mainly due to its wide bandgap and poor electrical conductivity. Therefore, reducing the bandgap width and increasing the conductivity are expected to make TiO 2 Th...

Claims

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Application Information

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IPC IPC(8): C01G23/047
Inventor 李东栋吴慧徐辰汪军鲁林峰陈小源
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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