CN203360046U - Visible light catalytic degradation reactor based on glass fiber load sodium bismuthate - Google Patents
Visible light catalytic degradation reactor based on glass fiber load sodium bismuthate Download PDFInfo
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- CN203360046U CN203360046U CN2013204266325U CN201320426632U CN203360046U CN 203360046 U CN203360046 U CN 203360046U CN 2013204266325 U CN2013204266325 U CN 2013204266325U CN 201320426632 U CN201320426632 U CN 201320426632U CN 203360046 U CN203360046 U CN 203360046U
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- sodium bismuthate
- glass fiber
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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
- 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
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Abstract
The utility model discloses a visible light catalytic degradation reactor based on glass fiber load sodium bismuthate, which is a glass sleeve composed of a glass internal tube and a glass external tube, wherein a visible light lamp is arranged in the glass internal tube; sodium bismuthate/epoxy resin/glass fiber composite with proper shape and size is uniformly filled in a glass tube jacket between the glass internal tube and the glass external tube; the sodium bismuthate/epoxy resin/glass fiber composite is composed of a glass fiber cloth layer and a sodium bismuthate epoxy resin glue layer coated on the glass fiber cloth layer; a water inlet and a water outlet are formed in two sides of the glass external tube respectively; an external cover is arranged at one end of the glass external tube. The visible light catalytic degradation reactor, disclosed by the utility model, is low in energy consumption and convenient to operate, and can fulfill the objective of degrading organic wastewater within a short time; the sodium bismuthate/epoxy resin/glass fiber composite is convenient to fill and replace and easier to recycle.
Description
Technical field:
The utility model belongs to the Technologies for Organic Wastewater Treatment field, is specifically related to a kind of visible light photocatalytic degradation reactor base based on glass fiber loaded sodium bismuthate.
Background technology:
The Fujishim of Tokyo Univ Japan in 1972 is incorporated into electricity in catalystic converter system, in rutile TiO with Honda together with light simultaneously
2found the photoelectrocatalysis Decomposition of water on Single Crystalline Electrodes, this discovery has started the research boom of conductor photocatalysis, started new era [Fujishim of the heterogeneous photochemical catalysis research of semi-conductor, K.Honda.Electrochemical photocatalysis of water at asemiconductor electroe[J] .Nature.1972,238:37-38.].1976, Carye[Carey J.H, Lawrence H M.Tosine.Photodechlorination of PCBs in the presence of titanium dioxide in aqueous so1utions[J] .Enviorn Contam Toxicol., l976,16:697.] etc. first by TiO
2be applied to the Study on degradation of polychlorobiphenyl, thereby untied the research prelude that conductor photocatalysis is applied to processing and the purifying air of water pollutant.1977, Frank and Bard proved TiO first
2prussiate in can degradation water, and proposed photocatalysis technology is applied to the suggestion of environmental improvement.In recent years, semiconductor light-catalyst is applied to the focus that environmental pollution improvement has become the world.The high pardon that there is higher photochemistry turnover ratio and stability and can entirely compose deep oxidation to all kinds of organic pollutants due to it, particularly it can directly utilize the outstanding unique advantage that sun power carries out the photochemistry conversion, at the very start the deep extensive concern that has been subject to scientist and great attention.The optically catalytic TiO 2 technology has become a kind of emerging environmental pollution treatment technology, and the research and development of its practicality have been subject to people's generally attention day by day.But, for now with TiO
2for basic photocatalysis technology also exists several critical problems urgently to be resolved hurrily, therefore seriously restricted its industrialized development.These problems sum up and mainly contain following 2 points: (l) energy gap is about 3.2eV, can only absorb the UV-light that wavelength is less than 387 nanometers, and the utilization ratio of sun power is very low; (2) the recycle and reuse difficulty of catalyzer, and be difficult to find can be effectively fixing TiO
2powder can not reduce the load technology of its catalytic activity again simultaneously.
Just start to pay close attention to sun power research people in light-catalysed early stage and transformed photochemical catalysis; mainly that research and development utilize and storage sun power; this process mainly realizes by utilizing sun power to carry out photodissociation hydrogen manufacturing to water; advantage is to utilize the new forms of energy hydrogen energy source to replace fossil fuel exactly, alleviates the energy dilemma of growing tension.But, at present mainly with the UV-light that only accounts for solar energy 4% as excitation light source, the utilization ratio of sun power is lower, so how to utilize the excitation light source of visible ray as conductor photocatalysis, directly utilizes sun power, becomes the focus of current research.Perovskite type metal oxide is widely used in the fields such as environment protection and Industrial Catalysis because of stable crystalline structure, unique electromagnetic performance and higher redox, hydrogenolysis, isomerization, electrocatalysis isoreactivity.Wherein, sodium bismuthate is a kind of excellent performance, broad-spectrum type material, research finds that it has higher visible light catalysis activity, utilizing visible ray green middle wide application prospect (the Kako T that demonstrated that curbs environmental pollution, Zou Z G, Katagiri M, et al.Decomposition of organic compounds over NaBiO
3under visible light irradiation[J] .Chemistry of Materials, 2007,19 (2): 198-202).
But, because the particle size of function powder is little, be not easy to reclaim, limited its industrial applications, seek the visible ray penetrance good, materialization bonding in surface is firm, the photocatalyst for degrading performance is had no adverse effects, specific surface area is large, to the organic pollutants high adsorption capacity, be easy to solid-liquid separation, efficient solid support material and the immobilization technology of stable chemical performance, the difficult problem that is difficult to Separation and Recovery existed in sewage treatment process to improve functional materials, reduce the cost in sewage treatment process, it is another key of visible light catalytic oxidation degradation of organic waste water application.
The existing visible light photocatalytic degradation reactor based on sodium bismuthate is generally a transparent glass container, and container outside (overhead or side) applies visible lamp, adds the sodium bismuthate powder in container.Because the sodium bismuthate powder particle size is little, be difficult to Separation and Recovery in sewage treatment process, therefore this reactor result of use bad.
The utility model content:
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of novel visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate that is filled with sodium bismuthate/epoxy resin/glass fiber compound material is provided.
Design of the present utility model is as follows: select glass fibre and epoxy resin relatively inexpensive, easy acquisition, prepare sodium bismuthate/epoxy resin/glass fiber compound material, simultaneously by this sodium bismuthate/epoxy resin/glass fiber compound material uniform filling in the Glass tubing photoreactor, obtain thus a kind of novel visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate.
The technical solution of the utility model is as follows:
A kind of visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate, this reactor is a glass bushing be comprised of glass inner tube and glass outer tube, be provided with the visible lamp that power is greater than 500W in glass inner tube, in the Glass tubing chuck between glass inner tube and glass outer tube, uniform filling has shape, sizeable sodium bismuthate/epoxy resin/glass fiber compound material; Described sodium bismuthate/epoxy resin/glass fiber compound material is comprised of glass fibre layer of cloth and coating sodium bismuthate epoxy glue layer thereon.
Described glass outer tube can be designed to vertical uncovered; Or be designed to (water-in, water outlet are located at respectively the both sides of glass outer tube, and an end of glass outer tube is provided with openable enclosing cover) of horizontal closed at both ends.
Described sodium bismuthate/epoxy resin/preferred 100-500g/L of the compactedness of glass fiber compound material uniform filling in the Glass tubing chuck; The preferred 5-8cm of glass inner tube diameter, the preferred 25-45cm of glass outer tube diameter.
Described sodium bismuthate/epoxy resin/glass fiber compound material prepares by the following method:
Process 50-70min in the aqueous solution of the silane coupling agent that is 0.5%-2% by sodium bismuthate powder immersion mass concentration, drying for standby after taking out; In epoxy resin, add the methyl tetrahydro phthalic anhydride of stoichiometric ratio to mix and obtain epoxy resin adhesive liquid; Sodium bismuthate powder after processing is sneaked in epoxy resin adhesive liquid by the add-on of 5-10g/L, and under 45-55 ℃ of condition ultrasonic dispersion 15-30min; The epoxy resin adhesive liquid that will contain the sodium bismuthate powder evenly is coated on alkali-free glass fiber cloth, then the glasscloth of impregnation is sent into after superimposed 3-5 layer in scribbling the steel die of releasing agent in the baking oven of 75-85 ℃ and is solidified 2.5-3.5h, the cooling rear demoulding; By the above-mentioned glass fibre laminates be coated with containing the epoxy resin adhesive liquid of sodium bismuthate powder be cut into definite shape a certain size, obtain a kind of sodium bismuthate/epoxy resin/glass fiber compound material.
Utilize the method for the above-mentioned visible light photocatalytic degradation reactor degradation of organic waste water based on glass fiber loaded sodium bismuthate as follows: the Glass tubing chuck that organic waste water is injected to described reactor, the organic waste water circulation is through described sodium bismuthate/epoxy resin/glass fiber compound material, touch the glasscloth containing the epoxy resin adhesive liquid of sodium bismuthate powder that is coated with in it, open visible lamp, under radiation of visible light, organic waste water reacts with sodium bismuthate generation visible light photocatalytic degradation.Reaction time is depending on organic waste water concentration.
The beneficial effects of the utility model:
The characteristics of the visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate described in the utility model are: filled the sodium bismuthate/epoxy resin of suitable shape size/glass fiber compound material in reactor.This sodium bismuthate/epoxy resin/glass fiber compound material is to visible ray according to having good absorptivity, and support materials has certain inertia to light-catalyzed reaction simultaneously.Improved the important channel of the anti-stress impact performance of matrix material with glass fiber reinforced epoxy resin.The utility model is low for equipment requirements, and energy consumption is low, easy to operate, can reach at short notice the target of degradation of organic waste water.
Compared with the prior art, the beneficial effects of the utility model also are embodied in:
(1) the utility model, without applying as auxiliary energies such as microwave, ultrasonic and ultraviolets, only need to carry out radiation of visible light to solution, compares the expensive of ultraviolet source, and the photochemical catalysis cost is controlled.
(2) sodium bismuthate/epoxy resin described in the utility model/glass fiber compound material, be by sodium bismuthate by cross linking of epoxy resin on glass fibre, support materials is transparent, do not affect the illumination transmissivity, the rigidity of support materials is better simultaneously, the organic waste water that can adapt to the different treatment amount, can provide extra adsorption to pollutent, improves the contact reacts probability of catalyzer and pollutent.
(3) sodium bismuthate/epoxy resin described in the utility model/glass fiber compound material can repeatedly be used continuously, and without regeneration, active high, the desired raw material preparation is simple, cheap, is easy to use of large-scale production.
(4) sodium bismuthate/epoxy resin described in the utility model/glass fiber compound material can easily fill and change, and compares the fine catalyst recovery comparatively easy.
(5) a whole set of system operating cost is very low, simple to operate.
The accompanying drawing explanation
Fig. 1 is the perspective view of a kind of visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate of the utility model;
Fig. 2 is the side-looking structural representation of a kind of visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate of the utility model;
Fig. 3 is the structural representation of facing of a kind of visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate of the utility model.
In figure: 1, glass inner tube 2, glass outer tube 3, Glass tubing chuck 4, visible lamp 5, sodium bismuthate/epoxy resin/glass fiber compound material 6, water-in 7, water outlet 8, enclosing cover
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment 1:
As Figure 1-3, a kind of visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate of the utility model, this reactor is one by glass inner tube 1 (diameter is 5cm) and glass outer tube 2(diameter, to be 30cm) glass bushing that forms, the visible lamp 4 that to be provided with power in glass inner tube be 500W, in Glass tubing chuck 3 between glass inner tube and glass outer tube, uniform filling has the sodium bismuthate/epoxy resin of suitable shape size/glass fiber compound material 5, and compactedness is 100g/L.Described sodium bismuthate/epoxy resin/glass fiber compound material is comprised of 3 layers of glass fibre layer of cloth and 3 layers of sodium bismuthate epoxy glue layer be coated on glasscloth.Water-in 6, water outlet 7 are located at respectively the both sides of glass outer tube; One end of glass outer tube also is provided with filling and the replacing that enclosing cover 8(facilitates sodium bismuthate/epoxy resin/glass fiber compound material 5).
Above-mentioned sodium bismuthate/epoxy resin/glass fiber compound material prepares by the following method: will process 1h in the aqueous solution of the silane coupling agent of sodium bismuthate powder immersion mass concentration 0.5%, drying for standby after taking out.In epoxy resin, add the methyl tetrahydro phthalic anhydride of stoichiometric ratio to mix and obtain epoxy resin adhesive liquid.Get 5g sodium bismuthate powder and sneak in the 1L epoxy resin adhesive liquid, and under 50 ℃ of conditions ultrasonic dispersion 20min.The epoxy resin adhesive liquid that will contain the sodium bismuthate powder evenly is coated on the alkali free glass fibre plain, then the cloth of impregnation is sent into after superimposed 3 layers in 80 ℃ of baking ovens and is solidified 3h, the cooling rear demoulding.The above-mentioned glass fibre laminates be coated with containing the epoxy resin adhesive liquid of sodium bismuthate powder is cut into to the square block that the length of side is 15cm one by one, obtains.
The luxuriant and rich with fragrance solution that configuration concentration is 10mg/L, in the Glass tubing chuck by the above-mentioned visible light photocatalytic degradation reactor of pump suction, open visible lamp, and after illumination reaction 2h, pollutants removal rate reaches 57%.
Embodiment 2:
As Figure 1-3, a kind of visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate of the utility model, this reactor is one by glass inner tube 1 (diameter is 8cm) and glass outer tube 2(diameter, to be 25cm) glass bushing that forms, the visible lamp 4 that to be provided with power in glass inner tube be 750W, in Glass tubing chuck 3 between glass inner tube and glass outer tube, uniform filling has the sodium bismuthate/epoxy resin of suitable shape size/glass fiber compound material 5, and compactedness is 200g/L.Described sodium bismuthate/epoxy resin/glass fiber compound material is comprised of 4 layers of glass fibre layer of cloth and 4 layers of sodium bismuthate epoxy glue layer be coated on glasscloth.Water-in 6, water outlet 7 are located at respectively the both sides of glass outer tube; One end of glass outer tube also is provided with filling and the replacing that enclosing cover 8(facilitates sodium bismuthate/epoxy resin/glass fiber compound material 5).
Above-mentioned sodium bismuthate/epoxy resin/glass fiber compound material prepares by the following method: will process 50min in the aqueous solution of the silane coupling agent of sodium bismuthate powder immersion mass concentration 1%, drying for standby after taking out.In epoxy resin, add the methyl tetrahydro phthalic anhydride of stoichiometric ratio to mix and obtain epoxy resin adhesive liquid.Get 7g sodium bismuthate powder and sneak in the 1L epoxy resin adhesive liquid, and under 55 ℃ of conditions ultrasonic dispersion 15min.The epoxy resin adhesive liquid that will contain the sodium bismuthate powder evenly is coated on the alkali free glass fibre drills, then the cloth of impregnation is sent into after superimposed 4 layers in scribbling the steel die of releasing agent in 85 ℃ of baking ovens and is solidified 3.5h, the cooling rear demoulding.The above-mentioned glass fibre laminates be coated with containing the epoxy resin adhesive liquid of sodium bismuthate powder is cut into to the isosceles triangle piece that the length of side is 8cm one by one, obtains a kind of sodium bismuthate/epoxy resin/glass fiber compound material.
The pentachlorophenol solution that configuration concentration is 5mg/L, in the Glass tubing chuck by the above-mentioned visible light photocatalytic degradation reactor of pump suction, open visible lamp, and after illumination reaction 1.5h, pollutants removal rate reaches 87%.
Embodiment 3:
As Figure 1-3, the utility model provides a kind of DeR device base based on glass fiber loaded sodium bismuthate visible light catalytic, this reactor is one by glass inner tube 1 (diameter is 8cm) and glass outer tube 2(diameter, to be 45cm) glass bushing that forms, the visible lamp 4 that to be provided with power in glass inner tube be 1000W, in Glass tubing chuck 3 between glass inner tube and glass outer tube, uniform filling has the sodium bismuthate/epoxy resin of suitable shape size/glass fiber compound material 5, and compactedness is 400g/L.Described sodium bismuthate/epoxy resin/glass fiber compound material is comprised of 5 layers of glass fibre layer of cloth and 5 layers of sodium bismuthate epoxy glue layer be coated on glasscloth.Water-in 6, water outlet 7 are located at respectively the both sides of glass outer tube; One end of glass outer tube also is provided with filling and the replacing that enclosing cover 8(facilitates sodium bismuthate/epoxy resin/glass fiber compound material 5).
Above-mentioned sodium bismuthate/epoxy resin/glass fiber compound material prepares by the following method: will process 70min in the aqueous solution of the silane coupling agent of sodium bismuthate powder immersion mass concentration 1.5%, drying for standby after taking out.In epoxy resin, add the methyl tetrahydro phthalic anhydride of stoichiometric ratio to mix and obtain epoxy resin adhesive liquid.Get 10g sodium bismuthate powder and sneak in the 1L epoxy resin adhesive liquid, and under 45 ℃ of conditions ultrasonic dispersion 25min.The epoxy resin adhesive liquid that will contain the sodium bismuthate powder evenly is coated on the alkali free glass fibre plain, then the cloth of impregnation is sent into after superimposed 5 layers in scribbling the steel die of releasing agent in 75 ℃ of baking ovens and is solidified 2.5h, the cooling rear demoulding.The above-mentioned glass fibre laminates be coated with containing the epoxy resin adhesive liquid of sodium bismuthate powder is cut into to the square block that the length of side is 10cm one by one, obtains a kind of sodium bismuthate/epoxy resin/glass fiber compound material.
The phenol solution that configuration concentration is 20mg/L, in the Glass tubing chuck by the above-mentioned visible light photocatalytic degradation reactor of pump suction, open visible lamp, and after illumination reaction 3.5h, pollutants removal rate reaches 92%.
Embodiment 4:
As Figure 1-3, the utility model provides a kind of DeR device base based on glass fiber loaded sodium bismuthate visible light catalytic, this reactor is one by glass inner tube 1 (diameter is 7cm) and glass outer tube 2(diameter, to be 30cm) glass bushing that forms, the visible lamp 4 that to be provided with power in glass inner tube be 750W, in Glass tubing chuck 3 between glass inner tube and glass outer tube, uniform filling has the sodium bismuthate/epoxy resin of suitable shape size/glass fiber compound material 5, and compactedness is 500g/L.Described sodium bismuthate/epoxy resin/glass fiber compound material is comprised of 5 layers of glass fibre layer of cloth and 5 layers of sodium bismuthate epoxy glue layer be coated on glasscloth.Water-in 6, water outlet 7 are located at respectively the both sides of glass outer tube; One end of glass outer tube also is provided with filling and the replacing that enclosing cover 8(facilitates sodium bismuthate/epoxy resin/glass fiber compound material 5).
Above-mentioned sodium bismuthate/epoxy resin/glass fiber compound material prepares by the following method: will process 1h in the aqueous solution of the silane coupling agent of sodium bismuthate powder immersion mass concentration 2%, drying for standby after taking out.In epoxy resin, add the methyl tetrahydro phthalic anhydride of stoichiometric ratio to mix and obtain epoxy resin adhesive liquid.Get 8g sodium bismuthate powder and sneak in the 1L epoxy resin adhesive liquid, and under 50 ℃ of conditions ultrasonic dispersion 30min.The epoxy resin adhesive liquid that will contain the sodium bismuthate powder evenly is coated on the alkali free glass fibre plain, then the cloth of impregnation is sent into after superimposed 5 layers in scribbling the steel die of releasing agent in 80 ℃ of baking ovens and is solidified 3h, the cooling rear demoulding.The above-mentioned glass fibre laminates be coated with containing the epoxy resin adhesive liquid of sodium bismuthate powder is cut into to the regular hexagon piece that the length of side is 5cm one by one, obtains a kind of sodium bismuthate/epoxy resin/glass fiber compound material.
The methylene blue solution that configuration concentration is 50mg/L, in the Glass tubing chuck by the above-mentioned visible light photocatalytic degradation reactor of pump suction, open visible lamp, and after illumination reaction 2.5h, pollutants removal rate reaches 97%.
Claims (5)
1. the visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate, it is characterized in that, this reactor is a glass bushing be comprised of glass inner tube and glass outer tube, being provided with power in glass inner tube is the above visible lamp of 500W, and in the Glass tubing chuck between glass inner tube and glass outer tube, uniform filling has shape, sizeable sodium bismuthate/epoxy resin/glass fiber compound material; Described sodium bismuthate/epoxy resin/glass fiber compound material is comprised of glass fibre layer of cloth and coating sodium bismuthate epoxy glue layer thereon.
2. the visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate as claimed in claim 1, it is characterized in that, the sodium bismuthate epoxy glue layer that described sodium bismuthate/epoxy resin/glass fiber compound material is coated on glasscloth by 3-5 layer glass fibre layer of cloth and 3-5 layer forms.
3. the visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate as claimed in claim 1 or 2, it is characterized in that: water-in, water outlet are located at respectively the both sides of glass outer tube; One end of glass outer tube also is provided with enclosing cover.
4. the visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate as claimed in claim 3, it is characterized in that: the described sodium bismuthate/epoxy resin/compactedness of glass fiber compound material uniform filling in the Glass tubing chuck is 100-500g/L.
5. the visible light photocatalytic degradation reactor based on glass fiber loaded sodium bismuthate as claimed in claim 4, it is characterized in that: the glass outer tube diameter of described reactor is 25-45cm, the glass inner tube diameter of described reactor is 5-8cm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744835A (en) * | 2017-10-12 | 2018-03-02 | 湖北工业大学 | A kind of preparation method of sodium bismuthate base visible light catalytic paper material |
| CN108940196A (en) * | 2018-06-28 | 2018-12-07 | 湖北工业大学 | A kind of preparation method of activated carbon fiber-loaded sodium bismuthate adsoption catalysis material |
| CN113264569A (en) * | 2021-05-17 | 2021-08-17 | 西安交通大学 | Micro-fluid photodegradation device and preparation method thereof |
-
2013
- 2013-07-17 CN CN2013204266325U patent/CN203360046U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744835A (en) * | 2017-10-12 | 2018-03-02 | 湖北工业大学 | A kind of preparation method of sodium bismuthate base visible light catalytic paper material |
| CN107744835B (en) * | 2017-10-12 | 2019-11-15 | 湖北工业大学 | A kind of preparation method of sodium bismuthate base visible light catalytic paper material |
| CN108940196A (en) * | 2018-06-28 | 2018-12-07 | 湖北工业大学 | A kind of preparation method of activated carbon fiber-loaded sodium bismuthate adsoption catalysis material |
| CN113264569A (en) * | 2021-05-17 | 2021-08-17 | 西安交通大学 | Micro-fluid photodegradation device and preparation method thereof |
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