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Preparation and control method of catalytic electrode for bioelectrochemical and photoelectrocatalytic degradation of ethyl acetate and toluene

A technology of bioelectrochemistry and photocatalysis, applied in physical/chemical process catalysts, chemical instruments and methods, gas treatment, etc., can solve the problems of high recombination rate of photoelectron-hole pairs, lack of visible light response, and low quantum yield. Achieve the effect of short degradation time, simple preparation process and good stability

Active Publication Date: 2019-09-06
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are major disadvantages such as low quantum yield, high recombination rate of photoelectron-hole pairs, and lack of visible light response.

Method used

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  • Preparation and control method of catalytic electrode for bioelectrochemical and photoelectrocatalytic degradation of ethyl acetate and toluene
  • Preparation and control method of catalytic electrode for bioelectrochemical and photoelectrocatalytic degradation of ethyl acetate and toluene
  • Preparation and control method of catalytic electrode for bioelectrochemical and photoelectrocatalytic degradation of ethyl acetate and toluene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Degradation of ethyl acetate gas under different systems

[0025] The interior of the reactor includes a 50w halogen tungsten lamp, a 3w small fan, and the volume of the anode chamber is 160cm 3 , equipped with Shewan's electrogenic bacteria and nutrient solution (52mL), the electrogenic bacteria are loaded on activated carbon (22g), the voltage is maintained between 0.35 and 0.4V, and the stainless steel mesh (3cm×6cm) loaded with 0.05g catalyst As the air cathode, microorganisms as the anode, separated by a proton exchange membrane in the middle, the electrons generated by the anode are exported from the copper wire through the carbon rod, the cathode is connected with the stainless steel mesh with the crocodile clip, and communicated with the external circuit through the copper wire, and the external circuit is connected with a resistor and ammeter voltmeter.

[0026] Before the reaction, use a 10 μL liquid-phase sampling needle to inject 2 μL ethyl aceta...

Embodiment 2

[0032] Embodiment two: Degradation of toluene gas under different systems

[0033] The reactor device is the same as in Example 1. Before the reaction, inject 4 μL of toluene solution (corresponding to a gas concentration of 340 ppm) into the reactor with a 10 μL liquid-phase sampling needle, and turn on the fan to mix evenly. After 30 minutes, start to connect the circuit and light for the reaction , the light source is facing the catalyst, and the distance from the catalyst is 5cm. Use a 1mL gas phase sampling needle to take samples. The measured concentration is recorded as the initial concentration C 0 , and then take a sample every 10 minutes, and record the data C t , The reaction time is 2h.

[0034] Blank control system: there is a stainless steel mesh (3cm×6cm) coated with 0.05g of material in the reactor, without MFC components, and the measurement is carried out without light;

[0035] PC system: the reaction device is similar to the blank control, the difference ...

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Abstract

The invention provides a preparation and control method of a catalytic electrode for bioelectrochemical and photoelectrocatalytic degradation of ethyl acetate and toluene, belongs to the technical fields of gas pollutant purification and volatile organic pollutant removal, and mainly relates to the preparation of a Ag / AgBr / TiO2-ZnO composite nanocatalyst. A silica solution is used for fixing a nano-catalytic material on a stainless steel network to be a catalytic cathode, a microbial fuel cell serves as an anode, electricity generated by microorganisms is guided out through carbon rods, the anode is connected with an external resistor through a circuit and forms a closed circuit with the cathode, and a photoelectrocatalytic coupled microorganism fuel cell system is constructed. A PEC-MFC system degrades ethyl acetate gas and toluene gas in a batch type system and a recycle system respectively, polluted gas is efficiently removed under visible light, and a new idea is provided for VOC control.

Description

technical field [0001] The invention belongs to the technical field of gas pollutant purification and removal of volatile organic pollutants (VOC), and mainly relates to Ag / AgBr / TiO 2 The preparation of -ZnO composite nanocatalyst, photoelectric catalysis coupling microbial fuel cell system degrades ethyl acetate gas and toluene gas in batch and circulation systems respectively, and realizes the efficient removal of polluting gases under visible light, providing a new way for the treatment of VOC train of thought. Background technique [0002] With the development of industry, the VOC emitted into the atmosphere during the production process is gradually increasing. VOC is an important precursor of photochemical smog, which can react photochemically with hydroxyl radicals (OH) and nitrogen oxides (NOx) in the atmosphere, leading to the formation of ground smog; it can also cause climate warming and sick building syndrome , plant decay and human carcinogenicity, etc., so it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01D53/86B01D53/72B01D53/74
CPCB01J27/138B01D53/8668B01D53/74B01D2255/806B01D2255/802B01D2257/708B01J35/33
Inventor 高翔柳丽芬
Owner DALIAN UNIV OF TECH
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