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A particle electrode with photoelectric catalytic function and its preparation and application

A particle electrode, photoelectric catalysis technology, applied in the field of electrochemical electrodes, can solve the problems of electrodes only having electrocatalytic function but not photocatalytic function, unable to realize photoelectric catalytic synergistic effect, etc., achieving significant social and economic benefits, improving biodegradability, The effect of less investment

Inactive Publication Date: 2011-12-14
DONGHUA UNIV +1
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a particle electrode with photoelectric catalytic function and its preparation and application, so as to solve the problem that the existing electrodes only have electrocatalytic function but not photocatalytic function, and cannot realize the synergistic effect of photoelectric catalysis

Method used

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  • A particle electrode with photoelectric catalytic function and its preparation and application
  • A particle electrode with photoelectric catalytic function and its preparation and application
  • A particle electrode with photoelectric catalytic function and its preparation and application

Examples

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Embodiment 1

[0053] (1) Pretreatment of graphite particles: Soak graphite particles with a diameter of 5 mm and a length of 7.5 mm in distilled water for 24 hours and rinse several times, then boil them in a beaker for 10 minutes to remove air bubbles, leave to cool, filter out water and put them in an oven Bake in medium for 24 hours before use.

[0054] (2) Nano-TiO 2 Preparation of the sol: Take 61 mL of n-butyl titanate and slowly dissolve it in 241 mL of ethanol solution, add dropwise 36 mL of glacial acetic acid, add 36 mL of triton surfactant, add 5 g of polyethylene glycol, and stir at room temperature for 3 After 1 hour, use 1:1 hydrochloric acid to control the pH value to 2 to obtain a stable and uniform solution A; take 18ml of twice-distilled water and dissolve it in 90ml of ethanol to form solution B, slowly add solution B to solution A, and stir for 2.5 hours, a yellowish transparent sol was obtained.

[0055] (3) Immersion aging: immerse the pretreated graphite particles i...

Embodiment 2

[0060] Printing and dyeing wastewater is known as refractory organic wastewater, which has color pollution in addition to COD pollution, and Rhodamine B is one of the refractory organics. The graphite particles with photocatalytic function prepared in Example 1 are filled in figure 1 A third-dimensional electrode is formed between the two flat electrodes in the reactor, and rhodamine B solution with a concentration of 10 mg / L is added, and the particle electrode is discharged after reaching adsorption equilibrium in the form of adsorption, and fresh rhodamine B solution of the same concentration is added again to carry out Light, electricity, and photoelectric catalytic oxidation decolorization degradation, sampling analysis and testing at regular intervals during the treatment process and calculation of decolorization rate calculation ( , where A 0 is the absorbance of wastewater before degradation; A t is the absorbance of wastewater at time t of degradation; both are the...

Embodiment 3

[0064] Measure 61mL of n-butyl titanate and dissolve slowly in 150mL ethanol solution, add dropwise 18mL of glacial acetic acid, add 36mL of triton surfactant, add 5g of polyethylene glycol, add 0.3g of lanthanum nitrate, and stir at room temperature for 3 After 1 hour, use 1:1 hydrochloric acid to control the pH value to 2 to obtain a stable and uniform solution A; take 10ml of double distilled water and dissolve it in 45ml of ethanol to form solution B, then slowly add solution B to solution A, and After stirring for 2.5 hours, TiO doped with elemental lanthanum was obtained 2 Sol; All the other obtained the nano-TiO that loaded element doped lanthanum by the same method in embodiment 1 2 particle electrodes.

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Abstract

The invention provides a particle electrode with photoelectric catalytic function and its preparation and application. The electrode is composed of carrier porous graphite loaded nano-TiO2, and the preparation includes (1) pretreatment of graphite particles, (2) preparation of nano-TiO2 by sol-gel method Sol, (3) immersion aging, (4) heat treatment, (5) activation by roasting. The preparation method of the invention is simple and requires less investment; the prepared particle electrode with photocatalytic function has photocatalytic function and electrocatalytic function at the same time, and can effectively reduce the recombination of photogenerated electron-hole pairs in the three-dimensional electrode photocatalytic system and improve the quantum efficiency , obtain obvious synergistic effect of electrocatalysis and photocatalysis, greatly improve the biodegradability of sewage, reduce the energy consumption of sewage treatment and at the same time significantly increase the degradation rate of organic pollutants in water; suitable for the treatment of various refractory organic pollutants, The social and economic benefits are remarkable and the application prospect is broad.

Description

technical field [0001] The invention belongs to the field of electrochemical electrodes, and in particular relates to a particle electrode with photoelectric catalytic function and its preparation and application. Background technique [0002] With the development of modern industry, the discharge of various types of sewage is increasing day by day, the color of sewage is getting darker, and it contains more and more refractory toxic organic components. However, traditional organic sewage treatment methods have many defects. , it is difficult to degrade substances such as rhodamine B and methyl orange, and cannot meet the requirements of environmental protection and sustainable development. The advanced oxidation process (Advanced Oxidation Processes, AOPs), especially the photocatalytic oxidation and electrocatalytic oxidation technology has attracted more and more attention, and has become a research hotspot of new technologies for the treatment of toxic and harmful organi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 景晓辉蔡再生卑圣金
Owner DONGHUA UNIV
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