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Automatic biasing microbial coupled photoelectrocatalysis fuel cell pollution control system and electrode preparation method

A photoelectric catalysis and fuel cell technology, applied in biochemical fuel cells, battery electrodes, chemical instruments and methods, etc., can solve problems such as poor electricity generation performance, low degradation efficiency, and poor effluent quality, so as to promote the development of electronics and Effects of hole separation, efficient degradation, enhanced absorption and utilization

Active Publication Date: 2018-08-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology involves creating special types of catalyst called BiOC3 that can absorb or break up harmful chemical compounds like bacteria, peses, fats, tanning agents, etc., which are commonly found around us today's world. These catalyst have been developed from cheaper raw materials for use at home but they still require expensive equipment such as vacuum arc lamps (VAC) to operate properly. By combining these two elements together into one structure, this new type of photocatalysis device becomes more effective than traditional methods alone due to its ability to separate electron/hole pairs better.

Problems solved by technology

This patented technical solution describes combining photoelectric material and bacteria to improve cleanliness and reduce costs associated therewith electronic devices. These technologies include photosynthesis systems or membrane reactor systems, respectively called biofilm reactors or MECOs. They combine different types of components like photoconversion elements and batteries to create a stable and highly useful device. Additionally, these solutions aim to optimize the optoacoustic properties of the photocatalysers and produce electricity when combined together. Overall, this approach provides better ways to remove harmful compounds during remotely controlled processes.

Method used

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  • Automatic biasing microbial coupled photoelectrocatalysis fuel cell pollution control system and electrode preparation method
  • Automatic biasing microbial coupled photoelectrocatalysis fuel cell pollution control system and electrode preparation method
  • Automatic biasing microbial coupled photoelectrocatalysis fuel cell pollution control system and electrode preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] C-ZnO-g-C 3 N 4 - Preparation of BiOBr photocatalytic powder:

[0028] (1) g-C 3 N 4 Preparation: Weigh 5.0g of melamine, grind it, pass through a 300-mesh sieve, and put it in a crucible. The crucible was calcined in a muffle furnace at 550 °C for 4 hours at a heating rate of 5 °C min -1 . After cooling down, the crucible was taken out, and ground through a 300-mesh sieve to obtain a yellow powder.

[0029] (2) C-ZnO-g-C 3 N 4 Preparation: Mix 5mL of ethylene glycol (EG) and 75mL of ethanol and stir for 30 minutes, then add 0.654g of zinc acetate dihydrate to the mixed liquid, and mix in 0.08g of g-C 3 N 4 After stirring for 30 minutes, the clear solution was transferred to a 100 mL polytetrafluoroethylene-lined autoclave and heated at 180 °C for 12 hours in a forced-air drying oven. The precipitate was separated by suction filtration with a circulating water vacuum pump, and washed with absolute ethanol and deionized water several times. The precipitate was...

Embodiment 2

[0033] The C-ZnO-g-C prepared by embodiment 1 3 N 4 -BiOBr photocatalytic powder is evenly attached to the surface of carbon fiber cloth after hydrothermal pretreatment.

[0034] Self-bias microbial coupling photocatalytic fuel cell pollution control system operation: Add 400ml of simulated wastewater containing 10mg / L rhodamine B to the cathode chamber of a 100mm*50mm*200mm double-chamber reactor. C-ZnO-g-C 3 N 4 -The BiOBr electrode is used as the cathode, and Shewanella is filled in the anode chamber and placed on the other side of the reactor. The external circuit is connected to a 10Ω resistor. The light source uses a 50W cold reflective tungsten halogen lamp / ultraviolet lamp. The distance between the light source is 5cm, and the bottom of the reactor lasts Aeration provides sufficient dissolved oxygen for electronic activation of oxygen to generate oxygen free radicals. Before the reaction starts, expose to air and stir, avoid light and absorb for 30 minutes to reach...

Embodiment 3

[0037] The composition of the reaction system described in Example 2 is the same. Add 400 mL of tetracycline hydrochloride to the cathode chamber as simulated wastewater. Before the reaction starts under dark conditions during operation, aerate and stir, and absorb in the dark for 30 minutes to reach adsorption-desorption equilibrium. Samples were taken every 30 minutes for liquid chromatography analysis. Such as Figure 9 As shown, the degradation of tetracycline in the first 30 minutes is relatively low, mainly because the adsorption process of tetracycline is catalyzed by the electrode, and tetracycline can be degraded by 85% in 30 minutes. This implementation case found that this catalytic electrode still has a high degradation rate for other types of pollutants, so the quaternary coupling photocatalytic electrode C-ZnO-g-C 3 N 4 -BiOBr can be applied to the removal of other different types of pollutants.

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Abstract

The invention provides an automatic biasing microbial coupled photoelectrocatalysis fuel cell pollution control system and an electrode preparation method, and belongs to the technical field of energyand pollution wastewater treatment. A C-ZnO/g-C<3>N<4>/BrOBi quaternary photocatalyst is prepared from low-cost materials through a two-step hydrothermal method. By taking the C-ZnO/g-C<3>N<4>/BrOBiquaternary photocatalyst as a negative electrode and by taking microbial shewanella oneidensis as a positive electrode, the automatic biasing microorganism coupled photoelectrocatalysis fuel cell pollution control system is established for degrading and processing dye and antibiotic wastewater in different light intensities. The invention achieves the beneficial effects that the quaternary negative electrode photocatalyst, by combining wastewater treatment and power generation and power utilization in a coupling system, can realize high-efficiency and low-energy-consumption water pollution control.

Description

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Claims

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Application Information

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Owner DALIAN UNIV OF TECH
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