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Granule electrode possessing photoelectric catalytic function and its uses

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: 2008-05-28
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Granule electrode possessing photoelectric catalytic function and its uses
  • Granule electrode possessing photoelectric catalytic function and its uses
  • Granule electrode possessing photoelectric catalytic function and its uses

Examples

Experimental program
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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 photoelectrocatalytic function prepared in Example 1 are filled between the two flat electrodes in the reactor in Fig. 1 to form a third-dimensional electrode, and the rhodamine B solution with a concentration of 10mg / L is added to make the particle electrode Discharge after reaching adsorption equilibrium, re-add fresh Rhodamine B solution of the same concentration, carry out photo-, electricity-, photoelectric-catalyzed oxidation decolorization and degradation, and take samples, analyze and test at regular intervals during the treatment process and calculate the 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 maximum absorption wavelength...

Embodiment 3

[0064] Measure 61mL of n-butyl titanate and slowly dissolve it 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, the elemental lanthanum-doped TiO 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 photoelectrocatalysis functions, a process for preparation, and application. The particle electrode is composed of carrier porous graphite loading nanometer TiO2. The process for preparation comprises preprocess of graphite particles, preparation of manometer Tio2 colloidal sols with a sol-gel method, dipping and ageing, and annealing and heating activation. The process for preparation of the invention is easy, and has low investment. The particle electrode which is prepared with photoelectrocatalysis function has both photo catalysis function and electro catalysis function, compounds of photoproduction electron hole pairs can be minimized in three-dimensional electrode electro catalysis system, quantum efficiency can be increased, synergistic effects of photo catalysis and electro catalysis can be got, and biodegradability of sewage can be increased greatly. The invention is applied to treat various refractory organic pollutants, and has distinctive social and economic benefits and a wide application prospect.

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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IPC IPC(8): G01N27/30
Inventor 景晓辉蔡再生卑圣金
Owner DONGHUA UNIV
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