CN114956251A - Self-electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process and system - Google Patents

Self-electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process and system Download PDF

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CN114956251A
CN114956251A CN202210470220.5A CN202210470220A CN114956251A CN 114956251 A CN114956251 A CN 114956251A CN 202210470220 A CN202210470220 A CN 202210470220A CN 114956251 A CN114956251 A CN 114956251A
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electrode
anode
hydrogen peroxide
treatment process
photocatalytic degradation
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CN114956251B (en
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郝晓琼
银凤翔
何小波
李国儒
李志春
郁晓婷
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Changzhou University
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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
    • 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
    • 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
    • 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
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/10—Photocatalysts
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The invention discloses an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process and a system thereof, wherein an anode Bi electrode and a cathode catalyst electrode are respectively arranged at two sides of an electrolytic cell, and a light source is arranged beside the anode Bi electrode, wherein the anode and the cathode are connected through a lead; will contain Cl ‑ Injecting the ion wastewater into an electrolytic tank, turning on a light source, illuminating the anode Bi metal electrode, and simultaneously connecting the anode Bi metal electrode and the cathode electrode, wherein the anode Bi electrode is subjected to oxidation reaction to generate Bi 3+ And with Cl in the wastewater ‑ Ion combination, in-situ generating BiOCl photocatalyst on the Bi electrode, oxygen reduction reaction at the cathode to generate hydrogen peroxide,the invention provides a method for coupling an electrically-driven hydrogen peroxide oxidation process and a photocatalysis process, effectively solves the bottleneck problem of high energy consumption of the traditional electrochemical hydrogen peroxide oxidation process or the coupling process based on the traditional electrochemical hydrogen peroxide oxidation process, and has good application prospect.

Description

Self-electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process and system
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process and system.
Background
In recent years, key industries such as petrifaction, papermaking, plastics, textiles, pesticides and the like are developed vigorously, great contributions are made to economy, finance, export and employment of China, but a series of environmental problems are generated along with the development of the key industries, and the key industries are particularly remarkable in terms of large amounts of high-salinity organic wastewater generated in the production process. The direct discharge of such waste water not only destroys the surrounding ecological environment, but also affects the living environment and health of the surrounding residents.
Therefore, the method for treating the wastewater by a proper method is of great significance to guarantee the physical health of people and promote the green sustainable development of key industries.
At present, the organic wastewater treatment method mainly comprises a biological method, a physical method and a chemical method. Among them, the biological method is popular in the scientific and industrial fields because of its advantages such as low treatment cost, small technical difficulty and convenient operation and management, but because salts can inhibit the growth of microorganisms, the biological method has poor effect of treating high-salt organic wastewater. The membrane method is a typical physical method, can efficiently separate organic matters in organic wastewater, but the membrane is expensive, so that the treatment cost is high, and the industrial application of the membrane method is severely restricted. The chemical method mainly comprises a chemical oxidation method, a photocatalytic oxidation method and the like, wherein the hydrogen peroxide oxidation method as a typical chemical oxidation method has the advantages of high efficiency, environmental protection and the like and is widely applied to organic wastewater treatment.
At present, a method of adding hydrogen peroxide is generally adopted in the process of oxidizing and treating organic wastewater by hydrogen peroxide, but the chemical property of hydrogen peroxide is active and easy to decompose, so that the method of adding hydrogen peroxide usually needs to add hydrogen peroxide with a quantity far higher than the theoretical proportion to ensure effective removal of organic matters, which undoubtedly increases the treatment cost. Compared with the prior art, the method for producing hydrogen peroxide by reducing oxygen by adopting the electrochemical method can not only reduce the consumption of hydrogen peroxide in the traditional process of adding hydrogen peroxide, but also thoroughly solve the safety risk in the transportation and storage of hydrogen peroxide, so that the organic matter is degraded by the hydrogen peroxide oxidation method.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
Therefore, the invention aims to overcome the defects in the prior art and provide an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process.
In order to solve the technical problems, the invention provides the following technical scheme: an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process comprises,
an anode Bi electrode and a cathode catalyst electrode are respectively arranged on two sides of the electrolytic cell, and a light source is arranged beside the anode Bi electrode, wherein the anode and the cathode are connected through a lead;
will contain Cl - Injecting the ion wastewater into an electrolytic bath, turning on a light source, illuminating an anode Bi metal electrode, and simultaneously connecting the anode Bi metal electrode and a cathode electrode, wherein the anode Bi electrode is subjected to an oxidation reaction to generate Bi 3+ And with Cl in the wastewater - Ion combination, in-situ generating BiOCl photocatalyst on the Bi electrode, and generating hydrogen peroxide by oxygen reduction reaction at the cathode;
under the drive of light, active oxygen species (hydroxyl free radicals) are derived from cavities generated by the anode BiOCl photocatalyst and hydrogen peroxide generated on the surface of the cathode catalyst, and organic matters in the wastewater are completely mineralized into carbon dioxide to be removed.
As a preferred scheme of the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process, the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process comprises the following steps: the cathode catalyst electrode is composed of a gas diffusion layer substrate and an electroactive material having an oxygen reduction function.
As a preferred scheme of the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process, the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process comprises the following steps: the electroactive material with the oxygen reduction function is one or more of noble metals, carbon materials and transition metal oxides.
As a preferred scheme of the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process, the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process comprises the following steps: the light source irradiation angle and the anode Bi electrode angle are 35-135 degrees.
As a preferred scheme of the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process, the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process comprises the following steps: the light intensity of the light source irradiation is 10mW/cm 2 ～100mW/cm 2 。
The invention further aims to overcome the defects in the prior art and provide an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process in the presence of Cl - Application in the treatment of high-salt organic wastewater.
The invention also aims to overcome the defects in the prior art and provide a system applied to an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process.
In order to solve the technical problems, the invention provides the following technical scheme: a system applied to an electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process comprises,
an electrolysis system;
an illumination system; wherein the content of the first and second substances,
the electrolysis system comprises an electrolytic cell, an anode Bi electrode, a cathode catalyst electrode and a connecting lead, wherein the anode Bi electrode and the cathode electrode are sequentially arranged on two sides of the electrolytic cell and are connected through the connecting lead;
the illumination system comprises a light source which is arranged beside the anode Bi electrode.
As a preferable mode of the system of the present invention, wherein: the electrolytic cell also comprises a liquid inlet device, a liquid outlet device and an exhaust device, wherein the liquid inlet device is arranged at the bottom of the electrolytic cell, and the liquid outlet device and the exhaust device are arranged at the top of the electrolytic cell.
As a preferable mode of the system of the present invention, wherein: the connecting lead is also provided with a control switch.
The invention has the beneficial effects that:
(1) compared with the traditional hydrogen peroxide production method treatment process by electrochemistry, the self-electricity-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process provided by the invention has the advantages that Bi metal is used as an anode, an oxygen reduction catalyst electrode is used as a cathode, a Bi metal-air battery with a self-electricity-production function is constructed, the cathode generates an oxygen reduction reaction and generates hydrogen peroxide, the anode generates a photocatalyst on a self-oxidation surface, no external voltage is required for the reaction, and the problem of high energy consumption of the traditional process is thoroughly solved;
(2) compared with the traditional photocatalytic treatment process, the method disclosed by the invention has the advantages that the BiOCl photocatalyst is prepared on the basis of in-situ growth of an electrochemical method, and active species are uniformly distributed on the surface of the electrode, so that the electrode is in full contact with organic matters in wastewater; meanwhile, the catalytic surface adsorption energy is reduced, so that organic matters in the wastewater are enriched on the surface of BiOCl, and a better organic matter treatment effect is achieved;
(3) the invention realizes the synergy of the cathode and the anode by constructing the electrochemical reaction of a Bi metal-air battery mechanism, effectively couples the photocatalytic process with the hydrogen peroxide oxidation process, not only solves the problem of high energy consumption or poor treatment effect of a single process, but also solves the problem of complex coupling process of two processes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a system diagram of the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process of the present invention.
FIG. 2 is a reaction principle and a process schematic diagram of the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The invention relates to nitrogen-doped graphene, which is a reagent grade product with the nitrogen content of 3.0-5.0 wt% and is a common commercial product (Nanjing Xiancheng nano material science and technology Co., Ltd.); other raw materials are all common commercial products.
The preparation method of the cathode catalyst electrode comprises the following steps: fully dispersing and dissolving an electroactive material with an oxygen reduction function in a mixed solvent consisting of a perfluorosulfonic acid membrane solution, water and an alcohol (isopropanol) solution to prepare slurry, and uniformly coating the slurry on a carbon paper substrate of a gas diffusion layer to obtain a cathode catalyst electrode, wherein the volume ratio of the perfluorosulfonic acid membrane solution to the water to the isopropanol is 8:57: 35.
Example 1:
the embodiment provides a system for an electrically-driven hydrogen peroxide oxidation-coupling photocatalytic degradation treatment process, as shown in fig. 1, specifically including,
an electrolysis system 100;
an illumination system 200; wherein the content of the first and second substances,
the electrolysis system 100 comprises an electrolysis bath 101, an anode Bi electrode 102, a cathode catalyst electrode 103 and a connecting lead 104, wherein the anode Bi electrode 102 and the cathode catalyst electrode 103 are sequentially arranged at two sides of the electrolysis bath 101 and are connected through the connecting lead 104;
the illumination system 200 comprises a light source 201, wherein the light source 201 is arranged beside the anode Bi electrode 102;
the electrolytic tank 101 further comprises a liquid inlet device 101a, a liquid outlet device 101b and an exhaust device 101c, wherein the liquid inlet device 101a is arranged at the bottom of the electrolytic tank 101, and the liquid outlet device 101b and the exhaust device 101c are arranged at the top of the electrolytic tank 101;
a control switch 104a is also arranged on the connecting lead 104;
the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment is carried out under the system, specifically, 2L of industrial wastewater containing chlorine organic matters enters an electrolytic tank 101 through a liquid inlet device 101a, and an anode Bi electrode 102 and a cathode catalyst electrode 103 are immersed in the industrial wastewater;
the oxygen reduction electrocatalyst on the side of the cathode catalyst electrode 103 is made of nitrogen-doped graphene, the anode Bi electrode 102 and the cathode catalyst electrode 103 are communicated by closing the control switch 104a, the liquid outlet device 101b is closed, the exhaust device 101c is opened, the light source 201 in the illumination system 200 is opened, and the light intensity of the light source is 80mW/cm 2 The irradiation angle of the light source and the angle of the anode Bi electrode are 90 degrees, and after the treatment time is 1 hour, the connection is disconnected through the control switch 104a, and the reaction is finished;
the COD value of the Chemical Oxygen Demand (COD) of the industrial wastewater containing the chlorine organic matters is 3000ppm, and after 1 hour of treatment, the COD of the wastewater reaches the first-level discharge standard of the industrial wastewater.
The specific reaction principle and process are shown in figure 2.
Example 2:
in the system of example 1, the process for treating high concentration organic matter by photocatalytic coupling hydrogen peroxide oxidation comprises the steps of adopting a metal Bi electrode as an anode side electrode, adopting nickel oxide as a cathode side oxygen reduction electrocatalyst, adding 2L of industrial wastewater containing chlorine and organic matter into an electrolyte tank, wherein the Chemical Oxygen Demand (COD) value of the contained organic matter is 5000ppm, and the light intensity of a light source is 60mW/cm 2 The irradiation angle of the light source and the angle of the anode Bi electrode are 90 degrees, the treatment time is 3 hours, and the COD of the treated wastewater reaches the first-grade discharge standard of industrial wastewater.
Example 3:
in the system of example 1, in the process of oxidation treatment of high concentration organic matter by photocatalytic coupling with hydrogen peroxide, the oxygen reduction electrocatalyst on the cathode catalyst electrode 103 side is made of nitrogen-doped graphene material, the anode Bi electrode 102 and the cathode catalyst electrode 103 are communicated by closing the control switch 104a, the liquid outlet device 101b is closed, the exhaust device 101c is opened, the light source 201 in the illumination system 200 is turned on, and the light intensity of the light source is 100mW/cm 2 The irradiation angle of the light source and the angle of the anode Bi electrode are 65 degrees, and after the treatment time is 3 hours, the connection is disconnected through the control switch 104a, and the reaction is finished;
the COD value of the Chemical Oxygen Demand (COD) of the industrial wastewater containing the chlorine organic matters is 3000ppm, and after treatment, the COD of the wastewater reaches the first-level discharge standard of the industrial wastewater.
Example 4:
in the system of example 1, in the process of oxidation treatment of high concentration organic matter by photocatalytic coupling with hydrogen peroxide, the oxygen reduction electrocatalyst on the cathode catalyst electrode 103 side is made of nitrogen-doped graphene material, the anode Bi electrode 102 and the cathode catalyst electrode 103 are communicated by closing the control switch 104a, the liquid outlet device 101b is closed, the exhaust device 101c is opened, the light source 201 in the illumination system 200 is turned on, and the light intensity of the light source is 10mW/cm 2 The irradiation angle of the light source and the angle of the anode Bi electrode are 90 degrees, and after the treatment time is 6 hours, the connection is disconnected through a control switch 104a, and the reaction is finished;
the COD value of the Chemical Oxygen Demand (COD) of the industrial wastewater containing the chlorine organic matters is 3000ppm, and after treatment, the COD of the wastewater reaches the first-level discharge standard of the industrial wastewater.
The traditional process for electrochemically generating hydrogen peroxide needs to be driven by external voltage, which is also an energy consumption source of the process, so that the finding of an appropriate mode for driving oxygen reduction to spontaneously perform and generating hydrogen peroxide is an important idea for reducing the energy consumption of a system; meanwhile, the process of generating the double-oxidation degradation organic matter by electrochemistry only occurs at the cathode, the action of the anode is obviously ignored, and if the anode can also generate active species which are beneficial to the degradation of the organic matter like the cathode, the number of the active species of the whole process system is undoubtedly increased, and the degradation of the organic matter is further promoted. Based on the innovative thought, the Bi metal is used as the anode, and the electrochemical reaction similar to a Bi metal-air battery mechanism in an electrically-driven structure is used for promoting the cathode to spontaneously generate hydrogen peroxide; bi generated by oxidation reaction of Bi metal at anode 3+ With Cl in high-salt wastewater - The combination can generate BiOCl photocatalyst, and the BiOCl photocatalyst is generated in situ on an anode metal electrode, so that the BiOCl has high specific surface area and low surface adsorption energy, and has good photocatalytic performance.
Under the illumination condition, active oxygen species generated by anode BiOCl catalysis and active oxygen species generated by cathode hydrogen peroxide decomposition are synchronously performed, so that the concentration of the active oxygen species in a coupling system is increased, the treatment effect of the whole process is further improved, and the method has a good application prospect.
In summary, the invention discloses an electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process and a system thereof, wherein an anode Bi electrode and a cathode catalyst electrode are respectively arranged at two sides of an electrolytic cell, and a light source is arranged beside the anode Bi electrode, wherein the anode and the cathode are connected through a lead; will contain Cl - Injecting the ion wastewater into an electrolytic tank, turning on a light source, illuminating the anode Bi metal electrode, and simultaneously connecting the anode Bi metal electrode and the cathode electrode, wherein the anode Bi electrode is subjected to oxidation reaction to generate Bi 3+ And with Cl in the wastewater - The invention provides a coupling of an electrically-driven hydrogen peroxide oxidation process and a photocatalysis processThe new method effectively solves the bottleneck problem of high energy consumption of the traditional electrochemical hydrogen peroxide oxidation process or the coupling process based on the traditional electrochemical hydrogen peroxide oxidation process, and has good application prospect.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (9)

1. An electrically-driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process is characterized in that: comprises the steps of (a) preparing a substrate,
an anode Bi electrode and a cathode catalyst electrode are respectively arranged on two sides of the electrolytic bath, and a light source is arranged beside the anode Bi electrode, wherein the anode and the cathode are connected through a lead;
will contain Cl - Injecting the ion wastewater into an electrolytic tank, turning on a light source, illuminating the anode Bi metal electrode, and simultaneously connecting the anode Bi metal electrode and the cathode catalyst electrode, wherein the anode Bi electrode is subjected to oxidation reaction to generate Bi 3+ And with Cl in the wastewater - Ion combination, in-situ generating BiOCl photocatalyst on the Bi electrode, and generating hydrogen peroxide by oxygen reduction reaction at the cathode;
under the drive of light, a cavity generated by the anode BiOCl photocatalyst and active oxygen species hydroxyl radicals derived from hydrogen peroxide generated on the surface of the cathode catalyst act together to completely mineralize organic matters in the wastewater into carbon dioxide to be removed.
2. The self-electrically driven hydrogen peroxide oxidative coupling photocatalytic degradation treatment process as claimed in claim 1, wherein: the cathode catalyst electrode is composed of a gas diffusion layer substrate and an electroactive material having an oxygen reduction function.
3. The self-electrically driven hydrogen peroxide oxidative coupling photocatalytic degradation treatment process as claimed in claim 2, wherein: the electroactive material with the oxygen reduction function is one or more of noble metals, carbon materials and transition metal oxides.
4. The self-electrically driven hydrogen peroxide oxidative coupling photocatalytic degradation treatment process as claimed in any one of claims 1 to 3, characterized in that: the light source irradiation angle and the anode Bi electrode angle are 35-135 degrees.
5. The self-electrically driven hydrogen peroxide oxidative coupling photocatalytic degradation treatment process as claimed in claim 4, wherein: the light intensity of the light source irradiation is 10mW/cm 2 ～100mW/cm 2 。
6. The self-electrically-driven hydrogen peroxide oxidative coupling photocatalytic degradation treatment process as claimed in any one of claims 1 to 5, wherein the treatment process comprises Cl - Application in the treatment of high-salt organic wastewater.
7. A system applied to the self-electrically driven hydrogen peroxide oxidation coupling photocatalytic degradation treatment process of any one of claims 1 to 5 is characterized in that: comprises the steps of (a) preparing a substrate,
an electrolysis system (100);
an illumination system (200); wherein the content of the first and second substances,
the electrolysis system (100) comprises an electrolysis bath (101), an anode Bi electrode (102), a cathode catalyst electrode (103) and a connecting lead (104), wherein the anode Bi electrode (102) and the cathode catalyst electrode (103) are sequentially arranged on two sides of the electrolysis bath (101) and are connected through the connecting lead (104);
the illumination system (200) comprises a light source (201), and the light source (201) is arranged beside the anode Bi electrode (102).
8. The system of claim 7, wherein: the electrolytic tank (101) further comprises a liquid inlet device (101a), a liquid outlet device (101b) and an exhaust device (101c), wherein the liquid inlet device (101a) is arranged at the bottom of the electrolytic tank (101), and the liquid outlet device (101b) and the exhaust device (101c) are arranged at the top of the electrolytic tank (101).
9. The system of claim 7, wherein: the connecting lead (104) is also provided with a control switch (104 a).
CN202210470220.5A 2022-04-28 2022-04-28 Self-electrically driven hydrogen peroxide oxidative coupling photocatalytic degradation treatment process and system thereof Active CN114956251B (en)

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Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
CN106395998A (en) * 2016-10-18 2017-02-15 华东理工大学 Salt-containing wastewater resourceful treatment method
CN108675382A (en) * 2018-05-02 2018-10-19 景德镇陶瓷大学 One kind being based on TiO2The integrated catalytic system and its degradation process method of nano pipe light catalyst
CN110885984A (en) * 2018-09-11 2020-03-17 中国科学院大连化学物理研究所 Method for synthesizing hydrogen peroxide by utilizing solar photoelectrocatalysis
CN111847598A (en) * 2020-03-27 2020-10-30 同济大学 Efficient photoelectrocatalysis oxidation method for removing atrazine by virtue of cooperation of cathode and anode

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