CN112652842A - Micro-flow control photocatalytic fuel cell and preparation method and application thereof - Google Patents
Micro-flow control photocatalytic fuel cell and preparation method and application thereof Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M14/00—Electrochemical current or voltage generators not provided for in groups H01M6/00 - H01M12/00; Manufacture thereof
- H01M14/005—Photoelectrochemical storage cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention belongs to the field of photocatalytic fuel cells, and discloses a micro-flow control photocatalytic fuel cell and a preparation method and application thereof. The cell comprises a photocatalytic electrode, a light-transmitting micro-flow channel shell, a light-transmitting electrode groove, a lead and an electrolyte; the light-transmitting electrode groove is arranged in the light-transmitting micro-flow channel shell; the photocatalytic electrode comprises a photocatalytic anode and a photocatalytic cathode, and the photocatalytic anode and the photocatalytic cathode are arranged in the light-transmitting electrode groove; at least one group of liquid inlet holes and liquid outlet holes are formed in the light-transmitting micro-flow channel shell; the lead penetrates through the light-transmitting micro-flow channel shell and is respectively connected with the photocatalytic anode and the photocatalytic cathode. Compared with the traditional fuel cell, the micro-flow control photocatalytic fuel cell provided by the invention does not need preparation and addition of a proton exchange membrane, reduces the manufacturing cost of the cell, and does not need complex auxiliary equipment.
Description
Technical Field
The invention belongs to the field of photocatalytic fuel cells, and particularly relates to a micro-flow control photocatalytic fuel cell and a preparation method and application thereof.
Background
In recent years, as fossil fuels are exploited in large quantities, not only is the reserves of fossil fuels greatly reduced, but also the environment is seriously damaged in the exploitation process. Therefore, it is necessary to develop a device capable of degrading pollutants and outputting electric energy, so as to reduce environmental pollution, improve power generation efficiency, and achieve the effects of energy conservation and environmental protection. At present, fuel cells are widely applied to the field of new energy generation, for example, proton exchange membrane fuel cells, solid oxide fuel cells, and the like, because the fuel cells have the advantages of capability of directly converting chemical energy of fuel into electric energy, little environmental pollution, high power generation efficiency and high specific energy, and the fuel cells receive attention from governments of various countries in the fields of aerospace flight, automobile industry, ship industry, and the like. The basic principle is the reverse reaction of electrolyzed water, hydrogen and oxygen are supplied to the anode and cathode respectively, and after the hydrogen diffuses out through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. For smaller power plants on the market, the cost of fuel cells is too high, which is currently the biggest technical problem. In addition, the fuel cell has the defects of inconvenient storage, large volume, inconvenient carrying, great harm to the environment if electrolyte leaks and the like. In recent years, Photocatalytic Fuel Cells (PFCs) based on semiconductor Photocatalytic technology have begun to receive a wide range of attention from researchers. Under the illumination condition, the PFC converts chemical energy in the organic wastewater and absorbed solar energy into electric energy through a photoelectrochemical reaction, and simultaneously plays a role in degrading the wastewater. In view of the fact that the micro-fluid reactor is used for degrading organic waste and hydrolyzing hydrogen and CO2Excellent performance in systems involving photocatalytic reactions such as reduction, and the likePreviously, there is a need to provide a microfluidic photocatalytic fuel cell system that is small, portable, high in energy density and free of environmental contamination.
Disclosure of Invention
The invention aims to provide a micro-flow control photocatalytic fuel cell and a preparation method and application thereof aiming at the defects of the prior art. Compared with the traditional fuel cell, the micro-flow control photocatalytic fuel cell provided by the invention does not need to prepare and add a proton exchange membrane, reduces the manufacturing cost of the cell, and does not need complex auxiliary equipment such as fuel storage equipment.
In order to achieve the above object, a first aspect of the present invention provides a micro-fluidic photocatalytic fuel cell comprising a photocatalytic electrode, a light-transmissive micro-fluidic channel housing, a light-transmissive electrode groove, a lead wire, and an electrolyte;
the light-transmitting electrode groove is arranged in the light-transmitting micro-flow channel shell;
the photocatalytic electrode comprises a photocatalytic anode and a photocatalytic cathode, and the photocatalytic anode and the photocatalytic cathode are arranged in the light-transmitting electrode groove;
at least one group of liquid inlet holes and liquid outlet holes are formed in the light-transmitting micro-flow channel shell;
the lead penetrates through the light-transmitting micro-flow channel shell and is respectively connected with the photocatalytic anode and the photocatalytic cathode.
The invention provides a preparation method of the micro-fluidic photo-catalytic fuel cell in a second aspect, which comprises the following steps:
s1: cutting, drilling and bonding a plate for preparing the light-transmitting micro-flow channel shell to obtain the light-transmitting electrode groove and the at least one group of liquid inlet hole and liquid outlet hole;
s2: after the photocatalytic electrode is placed in the light-transmitting electrode groove, the plates are bonded to form the light-transmitting micro-flow channel shell; and the conducting wires are respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell is subjected to liquid leakage prevention treatment.
In a third aspect, the present invention provides a method for preparing a micro-fluidic photocatalytic fuel cell, including the following steps:
s1: cutting and drilling a plate for preparing the light-transmitting micro-flow channel shell to obtain the cathode tank, the anode tank and at least one group of liquid inlet holes and liquid outlet holes;
s2: after the photocatalytic anode and the photocatalytic cathode are respectively arranged in the anode groove and the cathode groove, the plates are bonded to form the light-transmitting micro-flow channel shell; and the conducting wires are respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell is subjected to liquid leakage prevention treatment.
The invention provides the application of the micro-flow control photocatalytic fuel cell in pollutant treatment.
The technical scheme of the invention has the following beneficial effects:
(1) compared with the traditional fuel cell, the micro-flow control photocatalytic fuel cell provided by the invention does not need to prepare and add a proton exchange membrane, reduces the manufacturing cost of the cell, and does not need complex auxiliary equipment such as fuel storage equipment; the preparation method of the micro-fluidic photocatalytic fuel cell provided by the invention is simple, convenient to carry, clean and environment-friendly, accurate in flow control, large in specific surface area, uniform in illumination and large in energy density, and can strengthen the transmission of photons, electrons and mass under the micro-scale, so that the micro-fluidic photocatalytic fuel cell can obtain higher performance than the traditional volumetric photocatalytic fuel cell.
(2) The assembly of the photocatalytic electrode of the microfluidic photocatalytic fuel cell provided by the invention can be in a side-by-side or face-to-face arrangement mode.
(3) The micro-flow control photocatalytic fuel cell provided by the invention can be used for treating pollutants, can effectively utilize chemical energy in organic pollutants, solves the problem of water pollution and relieves the shortage of energy. The micro-flow control photocatalytic fuel cell provided by the invention can also be used for carbon dioxide reduction, electric energy generation and hydrogen energy generation.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a schematic diagram of a micro-fluidic photocatalytic fuel cell provided in embodiment 1 of the present invention.
Fig. 2 shows a schematic diagram of a micro-fluidic photocatalytic fuel cell provided in embodiment 2 of the present invention. (wherein hv represents a lighting condition; Air represents Air)
The reference numerals are explained below:
1-a photocatalytic anode; 2-a photocatalytic cathode; 3-a light-transmissive microfluidic channel housing; 4-a first set of liquid inlet holes; 5-a first group of liquid outlet holes; 6-a second group of liquid inlet holes; 7-a second group of liquid outlet holes; 8-a wire; 9-a substrate; 10-a barrier layer; 11-an active material layer; 12-an electrolyte injector; 13-a light-transmissive electrode cell; 14-a water outlet liquid pump; 15-anode groove; 16-cathode channel; 17-light-transmissive microfluidic channel.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In a first aspect, the invention provides a microfluidic photocatalytic fuel cell comprising a photocatalytic electrode, a light-transmissive microfluidic channel housing, a light-transmissive electrode cell, a wire, and an electrolyte;
the light-transmitting electrode groove is arranged in the light-transmitting micro-flow channel shell;
the photocatalytic electrode comprises a photocatalytic anode and a photocatalytic cathode, and the photocatalytic anode and the photocatalytic cathode are arranged in the light-transmitting electrode groove;
at least one group of liquid inlet holes and liquid outlet holes are formed in the light-transmitting micro-flow channel shell;
the lead penetrates through the light-transmitting micro-flow channel shell and is respectively connected with the photocatalytic anode and the photocatalytic cathode.
In the invention, as a preferred scheme, two groups of liquid inlet holes and liquid outlet holes are arranged on the light-transmitting micro-flow channel shell, wherein one group of liquid inlet holes and liquid outlet holes are used for injecting and guiding out the electrolyte, and the other group of liquid inlet holes and liquid outlet holes are used for injecting and guiding out the pollutants.
In the invention, as a preferred scheme, a group of liquid inlet holes and liquid outlet holes are arranged on the light-transmitting micro-flow channel shell, so that the electrolyte and the pollutants are injected and guided out through the group of liquid inlet holes and liquid outlet holes.
In the invention, the length, width and height of the light-transmitting electrode tank are automatically regulated and controlled according to the actual battery preparation and the electrolyte inlet condition.
According to the present invention, preferably, the photocatalytic anode and the photocatalytic cathode each comprise an active material layer, a substrate and a barrier layer; the active material layer is loaded on the upper surface of the substrate, and the barrier layer surrounds the lower surface of the substrate and the side surface formed by the active material layer and the substrate.
According to the invention, preferably, the method for loading the active material layer on the upper surface of the substrate is to directly and uniformly scrape and coat the active material on the upper surface of the substrate, and the electroplating method, the hydrothermal method or the microwave hydrothermal method are adopted.
According to the invention, the active material of the photocatalytic cathode is preferably a P-type semiconductor material, preferably TiO2、BiVO4、WO3And ZrO2At least one of (1).
According to the invention, the active material of the photocatalytic anode is preferably an N-type semiconductor material, preferably Cu2O、NiO、MoS2And Cu2At least one of S.
According to the present invention, preferably, the preparation method of the active material is a hydrothermal method, a solvothermal method, a microwave hydrothermal method, a microwave solvothermal method, or an electrochemical deposition method.
According to the present invention, preferably, the substrate is selected from ITO, FTO, PET-ITO, carbon paper, nickel foam, copper mesh, metal thin film, metal sheet or metal mesh.
The barrier layer is made of at least one of epoxy resin, polytetrafluoroethylene, phenolic resin, polyester resin and polyamide resin.
According to the present invention, the electrolyte is preferably a neutral and non-polluting electrolyte, preferably a phosphate buffer solution with a pH of 7.
According to the invention, the plate material used for preparing the light-transmitting micro-fluidic channel shell is preferably made of acrylic plate or polydimethylsiloxane material.
According to the invention, preferably, the photocatalytic anode and the photocatalytic cathode are arranged in the light-transmitting electrode groove in a side-by-side manner; the thickness of the light-transmitting electrode groove is larger than that of the photocatalytic electrode, and the light-transmitting electrode groove is used for supporting the photocatalytic electrode so that the photocatalytic electrode is not in contact with the light-transmitting micro-flow channel shell; the liquid inlet hole and the liquid outlet hole are both arranged on the upper part of the light-transmitting micro-flow channel shell relative to the light-transmitting electrode groove.
According to the present invention, preferably, the light-transmissive electrode cell includes a cathode cell and an anode cell, which are disposed in the light-transmissive microfluidic channel housing face to face; the photocatalytic anode and the photocatalytic cathode are respectively arranged in the anode tank and the cathode tank; the liquid inlet and the liquid outlet are respectively arranged on the light-transmitting micro-flow channel shells on two sides of the anode tank.
In the present invention, the closer the distance between the photocatalytic anode and the photocatalytic cathode is, the better, and as a preferable scheme, when the photocatalytic anode and the photocatalytic cathode are arranged in the light-transmitting electrode tank in a shoulder-to-shoulder manner, the distance between the photocatalytic anode and the photocatalytic cathode may be 0.
In the invention, the size and the depth of the light-transmitting electrode groove can be determined according to the size and the application place of the photocatalytic anode and the photocatalytic cathode.
The invention provides a preparation method of the micro-fluidic photo-catalytic fuel cell in a second aspect, which comprises the following steps:
s1: cutting, drilling and bonding a plate for preparing the light-transmitting micro-flow channel shell to obtain the light-transmitting electrode groove and the at least one group of liquid inlet hole and liquid outlet hole;
s2: after the photocatalytic electrode is placed in the light-transmitting electrode groove, the plates are bonded to form the light-transmitting micro-flow channel shell; and the conducting wires are respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell is subjected to liquid leakage prevention treatment.
In a third aspect, the present invention provides a method for preparing a micro-fluidic photocatalytic fuel cell, including the following steps:
s1: cutting and drilling a plate for preparing the light-transmitting micro-flow channel shell to obtain the cathode tank, the anode tank and at least one group of liquid inlet holes and liquid outlet holes;
s2: after the photocatalytic anode and the photocatalytic cathode are respectively arranged in the anode groove and the cathode groove, the plates are bonded to form the light-transmitting micro-flow channel shell; and the conducting wires are respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell is subjected to liquid leakage prevention treatment.
According to the invention, the board for preparing the light-transmitting electrolytic cell is subjected to cutting and drilling treatment, and the cut board can be bonded by using strong double-sided adhesive or strong glass water, so that battery leakage is avoided.
The invention provides the application of the micro-flow control photocatalytic fuel cell in pollutant treatment.
According to the invention, preferably, the contaminant is a gas or a liquid.
The volume flow rate of the electrolyte is not more than 2.5 times of the volume of the light-transmitting micro-flow channel shell;
the temperature of the treatment can be between normal temperature and 40 ℃, and is preferably 20-40 ℃.
According to the invention, the conducting wire is respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and after the electrolyte and the pollutants enter the light-transmitting micro-flow channel, chemical energy is converted into electric energy, so that a battery loop is formed.
In the present invention, the temperature of the treatment may reduce the influence of electrochemical kinetics.
The present invention is specifically illustrated by the following examples.
Example 1
The present embodiment provides a micro-fluidic photocatalytic fuel cell, as shown in fig. 1, the cell includes a photocatalytic electrode, a light-transmissive micro-fluidic channel housing 3, a light-transmissive electrode groove 13, a lead wire 8 and an electrolyte;
the light-transmitting electrode groove 13 is arranged in the light-transmitting micro-flow channel shell 3;
the photocatalytic electrode comprises a photocatalytic anode 1 and a photocatalytic cathode 2; the photocatalytic anode 1 and the photocatalytic cathode 2 are arranged in the light-transmitting electrode groove 13 side by side; the thickness of the light-transmitting electrode groove 13 is greater than that of the photocatalytic electrode, and the light-transmitting electrode groove 13 is used for supporting the photocatalytic electrode so that the photocatalytic electrode is not in contact with the light-transmitting microfluidic channel shell 3; set up two sets of feed liquor holes and play liquid hole on printing opacity miniflow passageway casing 3, be first a set of feed liquor hole 4, first a set of liquid hole 5, second a set of feed liquor hole 6 and second a set of liquid hole 7 respectively, and its homogeneous phase for printing opacity electrode slot 13 set up in the upper portion of printing opacity miniflow passageway casing 3, wire 8 passes printing opacity miniflow passageway casing 3 respectively with photocatalysis positive pole 1 and photocatalysis negative pole 2 are connected. In this embodiment, the first group of inlet holes 4 and the first group of outlet holes 5 are used for injecting and discharging the electrolyte, and the second group of inlet holes 6 and the second group of outlet holes 7 are used for injecting and discharging the pollutants.
The photocatalytic anode 1 and the photocatalytic cathode 2 both comprise an active material layer 11, a substrate 9 and a barrier layer 10; the active material layer 11 is loaded on the upper surface of the substrate 9, and the barrier layer 10 is used for connecting the lower surface of the substrate 9 and the side surface formed by the active material layer 11 and the substrate 9The surface surrounds. The active material layer 11 is loaded on the upper surface of the substrate 9 by directly and uniformly scraping the active material on the upper surface of the substrate 9; the active material of the photocatalytic cathode 2 is P-type semiconductor material Cu2O; the active material of the photocatalytic anode 1 is N-type semiconductor material TiO2(ii) a The substrate 9 is FTO; the barrier layer 10 is made of epoxy resin.
The plate used for preparing the light-transmitting micro-flow channel shell 3 is an acrylic plate; the electrolyte is a phosphate buffer solution with a pH of 7.
The preparation method of the micro-flow control photocatalytic fuel cell comprises the following steps:
s1: cutting, drilling and bonding the plate for preparing the light-transmitting micro-flow channel shell 3 to obtain the light-transmitting electrode slot 13, the first group of liquid inlet holes 4, the first group of liquid outlet holes 5, the second group of liquid inlet holes 6 and the second group of liquid outlet holes 7;
s2: after the photocatalytic electrode is placed in the light-transmitting electrode groove 13, the plates are bonded to form the light-transmitting microfluidic channel shell 3; and the conducting wire 8 is respectively bonded with the photocatalytic anode 1 and the photocatalytic cathode 2 by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell 3 is subjected to liquid leakage prevention treatment.
In this embodiment, the cut plates can be bonded by using a strong double-sided adhesive tape, thereby preventing the leakage of the battery.
In this embodiment, the size of the plate used for preparing the light-transmitting microfluidic channel housing 3 is 5cm × 5cm, the size of the light-transmitting electrode groove 13 is 2cm × 1cm × 0.5cm, the thickness of the photocatalytic electrode is 0.2cm, and the size of the light-transmitting microfluidic channel is 2cm × 1cm × 0.3 cm.
Example 2
The present embodiment provides a micro-fluidic photocatalytic fuel cell, as shown in fig. 2, the cell includes a photocatalytic electrode, a light-transmissive micro-fluidic channel housing 3, a light-transmissive electrode groove 13, a lead wire 8 and an electrolyte;
the light-transmitting electrode groove 13 is arranged in the light-transmitting micro-flow channel shell 3;
the photocatalytic electrode comprises a photocatalytic anode 1 and a photocatalytic cathode 2; the light-transmitting electrode groove 13 comprises a cathode groove 16 and an anode groove 15, and the cathode groove 16 and the anode groove 15 are arranged in the light-transmitting micro-flow channel shell 3 in a face-to-face manner; the photocatalytic anode 1 and the photocatalytic cathode 2 are respectively arranged in the anode tank 15 and the cathode tank 16; a group of liquid inlet holes and liquid outlet holes, namely a first group of liquid inlet holes 4 and a first group of liquid outlet holes 5, are formed in the light-transmitting micro-flow channel shell 3, and the first group of liquid inlet holes 4 and the first group of liquid outlet holes 5 are respectively formed in the light-transmitting micro-flow channel shell 3 on two sides of the anode slot 15; the lead 8 penetrates through the light-transmitting micro-flow channel shell 3 and is respectively connected with the photocatalytic anode 1 and the photocatalytic cathode 2. In this embodiment, the electrolyte and the contaminants are both injected and discharged through the first set of inlet holes 4 and the first set of outlet holes 5.
The photocatalytic anode 1 and the photocatalytic cathode 2 both comprise an active material layer 11, a substrate 9 and a barrier layer 10; the active material layer 11 is loaded on the upper surface of the substrate 9, and the barrier layer 10 surrounds the lower surface of the substrate 9 and the side surface formed by the active material layer 11 and the substrate 9. The active material layer 11 is loaded on the upper surface of the substrate 9 by directly and uniformly scraping the active material on the upper surface of the substrate 9; the active material of the photocatalytic cathode 2 is P-type semiconductor material Cu2O; the active material of the photocatalytic anode 1 is N-type semiconductor material TiO2(ii) a The substrate 9 is FTO; the barrier layer 10 is made of epoxy resin.
The plate for preparing the light-transmitting micro-flow channel shell 3 is made of polydimethylsiloxane material; the electrolyte is a phosphate buffer solution with a pH of 7.
The preparation method of the micro-flow control photocatalytic fuel cell comprises the following steps:
s1: cutting and drilling a plate for preparing the light-transmitting micro-flow channel shell 3 to obtain the cathode slot 16, the anode slot 15, the first group of liquid inlet holes 4 and the first group of liquid outlet holes 5;
s2: after the photocatalytic anode 1 and the photocatalytic cathode 2 are respectively arranged in the anode groove 15 and the cathode groove 16, the plates are bonded to form the light-transmitting micro-flow channel shell 3; and the conducting wire 8 is respectively bonded with the photocatalytic anode 1 and the photocatalytic cathode 2 by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell 3 is subjected to liquid leakage prevention treatment.
In this embodiment, the cut plates can be bonded by using a strong double-sided adhesive tape, thereby preventing the leakage of the battery.
Example 3
This example provides the use of the microfluidic photocatalytic fuel cell of example 1 in wastewater treatment.
In the embodiment, the electrolyte is injected into the light-transmitting microfluidic channel 17 through the first group of liquid inlet holes 4 by using an electrolyte injector 12, and the volume flow rate of the electrolyte is 150 μ L/min;
in the embodiment, 10mg/L of methylene blue is used for simulating sewage, and the methylene blue is injected into the light-transmitting micro-flow channel 17 through the second group of liquid inlet holes 6;
the treatment temperature is normal temperature; the residence time of the mixed solution of methylene blue and electrolyte is controlled to be 30 s. And the treated methylene blue is pumped out of the light-transmitting micro-flow channel 17 by the effluent liquid pump 14.
After the treatment of this example, the concentration of methylene blue was reduced by 41%.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A micro-flow control photocatalysis fuel cell is characterized in that the cell comprises a photocatalysis electrode, a light-transmitting micro-flow channel shell, a light-transmitting electrode groove, a lead and an electrolyte;
the light-transmitting electrode groove is arranged in the light-transmitting micro-flow channel shell;
the photocatalytic electrode comprises a photocatalytic anode and a photocatalytic cathode, and the photocatalytic anode and the photocatalytic cathode are arranged in the light-transmitting electrode groove;
at least one group of liquid inlet holes and liquid outlet holes are formed in the light-transmitting micro-flow channel shell;
the lead penetrates through the light-transmitting micro-flow channel shell and is respectively connected with the photocatalytic anode and the photocatalytic cathode.
2. A micro-fluidic photocatalytic fuel cell according to claim 1, wherein the photocatalytic anode and photocatalytic cathode each comprise an active material layer, a substrate, and a barrier layer; the active material layer is loaded on the upper surface of the substrate, and the barrier layer surrounds the lower surface of the substrate and the side surface formed by the active material layer and the substrate.
3. A micro-fluidic photocatalytic fuel cell according to claim 2, wherein,
the method for loading the active material layer on the upper surface of the substrate is to directly and uniformly scrape and coat the active material on the upper surface of the substrate, and adopts an electroplating method, a hydrothermal method or a microwave hydrothermal method;
the active material of the photocatalytic cathode is a P-type semiconductor material, preferably TiO2、BiVO4、WO3And ZrO2At least one of;
the active material of the photocatalytic anode is an N-type semiconductor material, preferably Cu2O, NiO and MoS2,Cu2At least one of S;
the preparation method of the active material is a hydrothermal method, a solvothermal method, a microwave hydrothermal method, a microwave solvothermal method or an electrochemical deposition method;
the substrate is selected from ITO, FTO, PET-ITO, carbon paper, foamed nickel, copper mesh, metal film, metal sheet or metal mesh;
the barrier layer is made of at least one of epoxy resin, polytetrafluoroethylene, phenolic resin, polyester resin and polyamide resin.
4. A micro-fluidic photocatalytic fuel cell according to claim 1, wherein,
the electrolyte is neutral and pollution-free, and is preferably a phosphate buffer solution with the pH value of 7;
the plate used for preparing the light-transmitting micro-flow channel shell is made of an acrylic plate or a polydimethylsiloxane material.
5. A micro-fluidic photo-catalytic fuel cell according to claim 1, wherein the photo-catalytic anode and the photo-catalytic cathode are disposed shoulder-to-shoulder within the light-transmissive electrode cell; the thickness of the light-transmitting electrode groove is larger than that of the photocatalytic electrode, and the light-transmitting electrode groove is used for supporting the photocatalytic electrode so that the photocatalytic electrode is not in contact with the light-transmitting micro-flow channel shell; the liquid inlet hole and the liquid outlet hole are both arranged on the upper part of the light-transmitting micro-flow channel shell relative to the light-transmitting electrode groove.
6. A micro-fluidic photo-catalytic fuel cell according to claim 1, wherein the light-transmissive electrode cell comprises a cathode cell and an anode cell, the cathode cell and the anode cell being disposed face-to-face within the light-transmissive micro-fluidic channel housing; the photocatalytic anode and the photocatalytic cathode are respectively arranged in the anode tank and the cathode tank; the liquid inlet and the liquid outlet are respectively arranged on the light-transmitting micro-flow channel shells on two sides of the anode tank.
7. The method of any one of claims 1-5, comprising the steps of:
s1: cutting, drilling and bonding a plate for preparing the light-transmitting micro-flow channel shell to obtain the light-transmitting electrode groove and the at least one group of liquid inlet hole and liquid outlet hole;
s2: after the photocatalytic electrode is placed in the light-transmitting electrode groove, the plates are bonded to form the light-transmitting micro-flow channel shell; and the conducting wires are respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell is subjected to liquid leakage prevention treatment.
8. The method of any one of claims 1-4 or 6, comprising the steps of:
s1: cutting and drilling a plate for preparing the light-transmitting micro-flow channel shell to obtain the cathode tank, the anode tank and at least one group of liquid inlet holes and liquid outlet holes;
s2: after the photocatalytic anode and the photocatalytic cathode are respectively arranged in the anode groove and the cathode groove, the plates are bonded to form the light-transmitting micro-flow channel shell; and the conducting wires are respectively bonded with the photocatalytic anode and the photocatalytic cathode by utilizing conductive silver paste, and the light-transmitting micro-flow channel shell is subjected to liquid leakage prevention treatment.
9. Use of a micro-fluidic photo-catalytic fuel cell according to any one of claims 1 to 6 in the treatment of contaminants.
10. The use according to claim 9, wherein,
the contaminant is a gas or a liquid;
the volume flow rate of the electrolyte is not more than 2.5 times of the volume of the light-transmitting micro-flow channel shell;
the temperature of the treatment is 20-40 ℃.
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