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Particle electrode for photocatalytic three-dimensional electrode/electro-Fenton system and preparation method thereof

A particle electrode, catalytic three-dimensional technology, applied in light water/sewage treatment, adsorbed water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc. , to increase adhesion, reduce electron-hole recombination, and improve pore size

Active Publication Date: 2014-04-23
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-dimensional electrode / electric Fenton technology is based on the three-dimensional electrode, by aerating and adding Fe on the surface of the carbonaceous cathode 2+ , can form a Fenton reaction in the system, and cooperate with the three-dimensional electrode electrocatalysis to accelerate the degradation rate of pollutants; at the same time, the combination of photocatalysis and Fenton technology is also a method for efficiently degrading organic pollutants, and the synergistic degradation effect of the two has also been achieved. It has been proved, but the synergy between photocatalysis and three-dimensional electrode / electro-Fenton process, especially the visible light-catalyzed three-dimensional electrode / electro-Fenton process has not yet been realized
At present, the research on the photoelectrocatalytic performance of particle electrodes in the three-dimensional electrode system is mostly focused on ultraviolet photocatalysis, and does not have visible light photocatalytic performance.

Method used

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  • Particle electrode for photocatalytic three-dimensional electrode/electro-Fenton system and preparation method thereof
  • Particle electrode for photocatalytic three-dimensional electrode/electro-Fenton system and preparation method thereof
  • Particle electrode for photocatalytic three-dimensional electrode/electro-Fenton system and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] The photocatalytic three-dimensional electrode / particle electrode of the electro-Fenton system in this embodiment is composed of bimetallic Fe-Ni co-doped P25 supported by columnar activated carbon with a particle size of 3-5 mm and an aspect ratio of 1:1.

[0035] Its preparation method is:

[0036] (1) Pretreatment of activated carbon: soak the activated carbon that has washed away most of the black water in a sulfuric acid solution with a volume concentration of 0.01mol / L, boil it for 30 minutes, wash it to neutrality, and then soak it in a hydrogen solution with a volume concentration of 0.01mol / L Sodium oxide solution, boiled for 30 minutes and then washed until neutral to obtain cleaned activated carbon; treated the clean activated carbon twice in an ultrasonic environment with a power of 75W and a frequency of 20kHZ, each time for 0.5h, and then dried at 105°C 12h to obtain ultrasonically modified activated carbon; impregnate ultrasonically modified activated car...

Embodiment 2

[0040] Comparing the ordinary activated carbon particle electrode and the activated carbon-loaded Fe-Ni co-doped P25 particle electrode prepared in Example 1, it was investigated whether the prepared particle electrode has visible light photoelectrocatalytic performance.

[0041] Take 40g particle electrode to carry out saturation adsorption experiment in rhodamine B solution until the adsorption equilibrium is reached at the concentration of 20mg / L. The particle electrode after adsorption saturation is filled into figure 1 In the visible photocatalytic three-dimensional electrode / electro-Fenton reactor shown, the anode plate is a titanium plate, and the cathode plate is a graphite plate. Add 400ml of rhodamine B solution with a concentration of 20mg / L to carry out the pollutant degradation experiment. The control power supply voltage is 30V, the aeration rate is 1.5L / min, the dosage of anhydrous sodium sulfate is 5g / L, and the pH of the solution is 3.

[0042] In order to e...

Embodiment 3

[0047] The gac-loaded Fe-Ni co-doped P25 particle electrode prepared in embodiment 1 is used to carry out saturated adsorption treatment until it is no longer adsorbed under the rhodamine B solution of 20mg / L, and after the saturated treatment, it is filled to figure 1 In the visible photocatalytic three-dimensional electrode / electric Fenton reactor shown, the anode plate of the device is a titanium plate, and the cathode plate is a graphite plate. The control power supply voltage is 30V, the aeration rate is 1.5L / min, the dosage of anhydrous sodium sulfate is 5g / L, the pH of the solution is 3, Fe 2+ The dosage is 0.05mmol / L. Investigate the three processes of visible light photocatalysis (no electricity, add light source), three-dimensional electrode electro-Fenton (energize, no light source) visible light photocatalysis three-dimensional electrode / electro-Fenton (energize, add light source), and compare the effects of the three processes on 20mg / The degradation effect of L...

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Abstract

The invention discloses a particle electrode for a photocatalytic three-dimensional electrode / electro-Fenton system and a preparation method thereof. The particle electrode is prepared from activated-carbon loaded bimetallic codoping P25. The preparation method comprises the following steps: preprocessing activated carbon to obtain ultrasonic-nitric acid modified activated carbon; preparing bimetallic codoping P25, and then loading the ultrasonic-nitric acid modified activated carbon and the bimetallic codoping P25 to obtain the particle electrode used for the visible-light photocatalytic three-dimensional electrode / electro-Fenton system. The preparation method is simple, and the obtained particle electrode has a visible-light photoelectrocatalytic effect and can rapidly and efficiently degrade organic pollutants. The particle electrode can obtain an obvious visible-light photocatalysis and three-dimensional electrode / electro-Fenton synergetic treatment effect at the visible-light photocatalytic three-dimensional electrode / electro-Fenton system.

Description

technical field [0001] The invention belongs to the field of water treatment and water pollution control, and relates to a rapid degradation technology of refractory organic matter in waste water, in particular to a particle electrode and a preparation method of a photocatalytic three-dimensional electrode / electro-Fenton system. Background technique [0002] The combination of photocatalysis and electrocatalysis technology is currently a research hotspot in the treatment of refractory organic pollutants. It solves the limitations of low energy and current efficiency and high energy consumption in electrocatalysis, and the combination of the two has been proved to have a synergistic treatment effect in many studies. [0003] The three-dimensional electrode is to fill the particle electrode between the plates of the traditional two-dimensional electrode electrolyzer to form the third electrode. Compared with the two-dimensional electrode, the three-dimensional electrode greatl...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/28C02F1/30
Inventor 喻泽斌孙玲芳彭振波郭靖
Owner GUANGXI UNIV
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