CN106882880A - The processing method of rhdamine B waste water - Google Patents
The processing method of rhdamine B waste water Download PDFInfo
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- CN106882880A CN106882880A CN201710155036.0A CN201710155036A CN106882880A CN 106882880 A CN106882880 A CN 106882880A CN 201710155036 A CN201710155036 A CN 201710155036A CN 106882880 A CN106882880 A CN 106882880A
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- rhdamine
- waste water
- processing method
- rhodamine
- bismuth tungstate
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The invention discloses the processing method of rhdamine B waste water, comprise the following steps：In the ratio that the volume ratio of compound degradation agent and rhdamine B waste water is 2~5: 100, the compound degradation agent of rhodamine B degradation dyestuff is added to concentration in 15mg/L~25mg/L rhdamine B waste water, and the nutrient solution needed for adding Nitrobacter winogradskyi, reacted under the xenon lamp of 400W~600W, light application time is 270min~300min, completes the degraded to organic pollution；The compound degradation agent completes the degraded to toxic organic pollutant rhodamine B using bismuth tungstate and the synergy of Nitrobacter winogradskyi, and sodium carboxymethylcellulose plays cladding protective effect, it is possible to decrease toxic action of the rhodamine B to Nitrobacter winogradskyi.The processing method has the advantages that manufacturing cost is low, high treating effect.
Description
Technical field
The present invention relates to Organic Dyestuff Wastewater Treatment technical field, more particularly to a kind for the treatment of of rhdamine B waste water
Method.
Background technology
In textile printing and dyeing process, pollution environment and harmful auxiliary agent are largely used, these auxiliary agents are big
Many forms with liquid are discharged, and inevitably into water environment, cause water pollution.As rhdamine B have it is carcinogenic and
Mutagenicity, such chroma in waste water is deep, organic pollution content is high, biological degradability is poor, with conventional method such as physical absorption
Method, Fenton process etc. are difficult to administer, and cause the health of polluted water long-term degradation, serious harm water body environment and the mankind, therefore right
The degradation treatment of such waste water seems particularly significant and urgent.
Photocatalysis is that the luminous energy existed using nature is converted into the energy needed for chemically reacting to produce catalysis
The technology of effect, is decomposed to human body and the harmful organic substance of environment, while not resulting in the wave of resource by this means
Take the formation with additional pollution.Numerous studies show, almost all of organic pollution can be by effectively photocatalytic degradation, de-
Color, mineralising are inorganic molecules material, so that the pollution and harm to environment are eliminated, therefore, photocatalytic degradation progressively turns into
Organic Pollution administers one of the study hotspot in field.Most widely used at present is the TiO of ultraviolet excitation2Base optic catalytic
Agent, but due to its greater band gap (3.2eV), only there is response in ultraviolet light range, in visible-range and without catalysis
Activity, thus TiO2Utilization rate of the based photocatalyst in use to sunshine is relatively low, which greatly limits this kind of catalysis
The practical application of agent.Sight has been turned to Recent study personnel the exploitation of novel visible active photocatalyst one after another, at present
The visible light catalyst of exploitation has bismuth tungstate, nickel titanate etc., with narrower energy gap, can have under visible light higher
Catalysis activity.However, this kind of visible light catalyst manufacturing cost is high, therefore this kind of visible light catalyst photocatalysis is used alone
Degraded persistent organic pollutants, will be difficult to obtain large-scale promotion in actual applications.
Bioremediation technology is the new technology that the water pollutant that recent fast development is got up is repaired, and it is by water
High-effective microorganism bacterial strain is delivered in body, absorption, conversion or degraded using these microorganisms to Organic Pollutants In Water reach
Slow down or finally eliminate water pollution, recover the biological control measure of water ecology function.The main machine of microorganism remediation river sewage
Reason has：Microorganism is Self substances by assimilation meeting transform portion organic pollution, and another aspect microbes are produced not
Same biology enzyme is used as catalyst degradation N-NH3With TP etc.；In addition, microorganism can suppress algae by way of nutrient competition
The growth of class；Also can be by suppressing the growth of some pathogens and spoilage organisms as dominant bacteria, so as to reduce ammonia and stink
Produce.Operating cost is low, adaptable, reduce pollutant great efforts, will not cause pollution because having for microorganism remediation technology
The features such as thing is shifted, is expected to be played an important role during organic pollution aquifer is administered.But, some poisonous organic dirts
Most microorganisms are had very big toxic action by dye thing, such as phenol, rhodamine B, thus be greatly limit biological prosthetic
Application of the technology in toxic organic pollutant improvement.
Therefore, it is necessary to develop new low cost, especially rhodamine B contaminates the poisonous Recalcitrant chemicals of high treating effect
Material method of wastewater treatment.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, there is provided a kind of manufacturing cost is low, treatment effect
The processing method of really good rhdamine B waste water, principle is the synergy using bismuth tungstate and Nitrobacter winogradskyi, is completed
Degraded to toxic organic pollutant rhodamine B.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of processing method of rhdamine B waste water, comprises the following steps：By compound degradation agent and rhdamine B
The volume ratio of waste water is 2~2: 100 ratio, and the compound degradation agent of rhodamine B degradation dyestuff is added into concentration for 15mg/L
In~25mg/L rhdamine B waste water, and the nutrient solution needed for adding Nitrobacter winogradskyi, under the xenon lamp of 400W~600W
Reacted, the liquid level distance of xenon lamp and the rhdamine B waste water is 18cm~22cm, light application time be 270min~
300min, completes the degraded to organic pollution；
The compound degradation agent of the rhodamine B degradation dyestuff is obtained by following methods：
Nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid and carboxymethylcellulose sodium solution are mixed, mixed liquor is obtained, will
Gained mixed liquor is added in fermentation medium, and magnetic agitation is carried out at normal temperatures, and magnetic agitation rotating speed is 400r/min~500r/
Min, the time is 48h~72h, obtains the compound degradation agent of rhodamine B degradation dyestuff.
Preferably, in the nutrient solution, 10g containing glucose~15g/L, yeast extract 5g~10g/L, peptone 10g~
15g/L, potassium dihydrogen phosphate 0.5g~1g/L, magnesium sulfate 0.4g~0.5g/L.
Preferably, in the fermentation medium, 10g containing glucose~15g/1L, yeast extract 5g~10g/1L, peptone
10g~15g/1L, potassium dihydrogen phosphate 0.5g~1g/1L, magnesium sulfate 0.4g~0.5g/1L.
Preferably, in the mixed liquor, the ratio of the spore count in the nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid
It is 100g~120g: 5 × 109Cfu~6 × 109cfu。
Preferably, the nanometer bismuth tungstate is prepared by following methods：
(1) five water bismuth nitrates and tungstate dihydrate acid sodium are dissolved in the mixed solution of water and ethylene glycol, obtain bismuth tungstate forerunner
Liquid solution；Gained bismuth tungstate precursor solution is transferred in hydrothermal reaction kettle, coordination poly-merization is carried out, temperature is 150 DEG C~
160 DEG C, the time is 72h~96h, is centrifuged after completion of the reaction, by sediment washing, is dried, and obtains coordination polymer；
(2) coordination polymer obtained by step (1) is carried out into high-temperature heat treatment, temperature is 600 DEG C~650 DEG C, the time is
2.5h~3.5h, obtains a nanometer bismuth tungstate.
Preferably, in the bismuth tungstate precursor solution, bismuth nitrate is 2: 1 with the mol ratio of sodium tungstate.
Preferably, in the step (1), sediment is washed using ethanol, in the ring that temperature is 45 DEG C~65 DEG C
6h~10h is dried under border.
Preferably, the Nitrobacter winogradskyi is Nitrobacter winogradskyi (Nitrobacter winogradskyi) CGMCC
No.3390。
Principle of the invention is：
Bismuth tungstate shows excellent visible light activity to can completely be decomposed rhodamine B under visible ray.But be prepared into
This is too high, is difficult to obtain large-scale promotion in actual applications.Applicant passes through gas chromatography mass spectrometry (GC-MS), infrared (IR) and core
Magnetic resonance (1HNMR) method, detects intermediate product of the bismuth tungstate under visible light illumination during light degradation rhodamine B main
It is the benzyloxy amine of hypotoxicity, benzoic acid, neck phthalic acid etc., if thus the absorption such low toxicity organic matter of degraded can be looked for
Microorganism, be combined with each other by by the agent of bismuth tungstate photocatalytic degradation and microorganism, Synergistic degradation rhodamine B, so as to can drop
The production cost of low degradation agent is expected to realize wolframic acid bismuth catalyst large-scale promotion in actual applications.Due to metallic compound
Photocatalytic degradation agent has inhibitory action to most of microorganism, thus the suitable above-mentioned low toxicity intermediate product that can degrade microorganism
Selection needs lot of experiments to explore and theory analysis, has in practice been verified that, Nitrobacter winogradskyi is to benzyloxy amine, benzoic acid, neck
Phthalic acid has good catalytic degradation to act on, and bismuth tungstate does not poison inhibitory action to this quasi-microorganism, therefore, can profit
The compound degradation agent constituted with bismuth tungstate and Nitrobacter winogradskyi realizes the drop to poisonous persistent organic pollutants rhodamine B
Solution.
Compared with prior art, the advantage of the invention is that：
1st, the processing method of rhdamine B waste water of the invention, the Vickers coated using sodium carboxymethylcellulose is nitrified
Bacillus and the compound degradation agent of bismuth tungstate composition, degrade under the visible ray of 400W~600W to rhodamine B, and bismuth tungstate exists
The rhodamine B of high toxicity difficult degradation is first resolved into intermediate product benzyloxy amine, benzoic acid, neck phthalic acid under visible ray
Low toxicity intermediate product Deng, these photocatalytic degradations enters in the cavity of sodium carboxymethylcellulose cladding, for Nitrobacter winogradskyi
Absorb degraded.There are many hydroxyls in sodium carboxymethylcellulose structure, the surface for being coated on the compound degradation agent can be stablized, reduce sieve
Toxic actions of the red bright B to microorganism Nitrobacter winogradskyi, in addition, sodium carboxymethylcellulose property in water body is transparent, will not
Influence the photocatalysis performance of bismuth tungstate；In addition, sodium carboxymethylcellulose has loose and porous structure, in the low toxicity of photocatalytic degradation
Between product can enter sodium carboxymethylcellulose cladding cavity in, for Nitrobacter winogradskyi absorb degrade.
2nd, processing method of the invention is simple to operate, easy control of reaction conditions, with low cost, with potential industrialization
Application prospect.
Brief description of the drawings
Fig. 1 is m- degradation efficiency when the rhodamine B in the compound degradation agent wastewater by photocatalysis of embodiment 1 is corresponding
Graph of a relation.
Specific embodiment
Below in conjunction with specific preferred embodiment, the invention will be further described, but not thereby limiting the invention
Protection domain.
Embodiment 1：
A kind of processing method of rhdamine B waste water, comprises the following steps：
A. in 1ml compound degradation agents being added into 100ml concentration for the waste water of the rhodamine B of 20mg/L, and Vickers is added
Nutrient solution (10mg/mL containing glucose, yeast extract 5mg/mL, peptone 10mg/mL, potassium dihydrogen phosphate needed for bacterium nitrobacter
0.5mg/mL, magnesium sulfate 0.5mg/mL), the dye strength in waste water now is designated as C0。
Wherein, compound degradation agent is adopted and prepared with the following method：
(1) nanometer bismuth tungstate is prepared：
(1.1) five water bismuth nitrates and tungstate dihydrate acid sodium are dissolved in the mixed solution of water and ethylene glycol, before obtaining bismuth tungstate
Liquid solution is driven, wherein, the ratio of bismuth nitrate, sodium tungstate, ethylene glycol and water is 0.2mmol: 0.1mmol: 1mL: 0.5mL；By institute
Obtain bismuth tungstate precursor solution to be transferred in hydrothermal reaction kettle, carry out coordination poly-merization, temperature is 160 DEG C, and the time is 90h, instead
It is centrifuged after should finishing, by sediment washing, is dried, obtains coordination polymer；
(1.2) coordination polymer obtained by step (1.1) is put into Muffle furnace, is heated up with the heating rate of 15 DEG C/min
High-temperature heat treatment is carried out to 600 DEG C, the time is 2.5h, it is cold that heat treatment finishes rear stove, is pulverized after taking-up, obtains a nanometer wolframic acid
Bismuth.
(2) compound degradation agent of rhodamine B degradation dyestuff is prepared：
(2.1) in an aseptic environment, by nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid and carboxylic first obtained in step (1)
Base sodium cellulosate solution mixes, and obtains mixed liquor；Wherein, nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid and carboxymethyl cellulose
The ratio of plain sodium solution is 100mg: 1mL: 5mL, and Nitrobacter winogradskyi is Nitrobacter winogradskyi (Nitrobacter
Winogradskyi) CGMCC No.3390, the spore concentration in Nitrobacter winogradskyi spore liquid is 5 × 106Cfu/mL, carboxylic first
Base sodium cellulosate solution is prepared by following methods：Sodium carboxymethylcellulose is mixed with water, the heated sealed in 60 DEG C of water-baths,
Sustained oscillation dissolves sodium carboxymethylcellulose, obtains the carboxymethylcellulose sodium solution that mass concentration is 0.8wt%.
(2.2) step (2.1) gained mixed liquor is added into fermentation medium (10mg/mL containing glucose, yeast extract 5mg/
ML, peptone 10mg/mL, potassium dihydrogen phosphate 0.5mg/mL, magnesium sulfate 0.5mg/mL) in, magnetic agitation, magnetic are carried out at normal temperatures
Power speed of agitator is 500r/min, and the time is 48h, obtains the compound degradation agent of rhodamine B degradation dyestuff.
B. the rhodamine B solution of the addition compound degradation agent of step a is entered under the xenon lamp irradiation of visible light source 500W
Row photocatalytic degradation reacts and starts timing, and light source is 20cm with liquid level distance.5ml is drawn from reaction system every 30min
Solution, after 5min is centrifuged under the rotating speed of 5000r/min, Aspirate supernatant, with UV, visible light spectrophotometric determination supernatant
Middle dyestuff residual concentration is simultaneously designated as C.After after illumination reaction 300min, xenon lamp is closed.
With C/C0It is ordinate, with light application time as abscissa, in making the compound degradation agent degrading waste water of the present embodiment
The graph of a relation of m- degradation efficiency when rhodamine B is corresponding, as a result as shown in figure 1, as seen from the figure, it is seen that after light irradiation 300min,
The compound degradation agent of the present embodiment reaches 83.52% to rhodamine B degradation efficiency, and this shows, compound degradation agent pair of the invention
Rhodamine B has very strong degradation capability.With potential industrial applications prospect.
Embodiment 2：
A kind of processing method of rhdamine B waste water, comprises the following steps：
A. printing and dyeing mill of Jiangsu Jiangyin City waste water from dyestuff is chosen, the waste water from dyestuff major pollutants are rhodamine B, through inspection
Survey, more than 120mg/L, the waste water from dyestuff is diluted to rhodamine B concentration for 20mg/L to rhodamine B concentration.
B. in the ratio that the volume ratio of the rhdamine B waste water after compound degradation agent and dilution is 1.5: 100 above-mentioned
Add compound degradation agent in rhdamine B waste water after dilution, and nutrient solution needed for adding Nitrobacter winogradskyi is (containing grape
Sugared 15g/L, yeast extract 10g/L, peptone 15g/L, potassium dihydrogen phosphate 0.5g/L, magnesium sulfate 0.5g/L), by waste water now
Dye strength be designated as C0。
Wherein, compound degradation agent is adopted and prepared with the following method：
(1) nanometer bismuth tungstate is prepared：
(1.1) five water bismuth nitrates and tungstate dihydrate acid sodium are dissolved in the mixed solution of water and ethylene glycol, before obtaining bismuth tungstate
Liquid solution is driven, wherein, the ratio of bismuth nitrate, sodium tungstate, ethylene glycol and water is 0.2mol: 0.1mol: 1L: 0.5L；By gained tungsten
Sour bismuth precursor solution is transferred in hydrothermal reaction kettle, carries out coordination poly-merization, and temperature is 160 DEG C, and the time is 90h, has been reacted
It is centrifuged after finishing, by sediment washing, is dried, obtains coordination polymer；
(1.2) coordination polymer obtained by step (1.1) is put into Muffle furnace, is heated up with the heating rate of 15 DEG C/min
High-temperature heat treatment is carried out to 600 DEG C, the time is 2.5h, it is cold that heat treatment finishes rear stove, is pulverized after taking-up, obtains a nanometer wolframic acid
Bismuth.
(2) compound degradation agent of rhodamine B degradation dyestuff is prepared：
(2.1) in an aseptic environment, by nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid and carboxylic first obtained in step (1)
Base sodium cellulosate solution mixes, and obtains mixed liquor；Wherein, nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid and carboxymethyl cellulose
The ratio of plain sodium solution is 120g: 1L: 5L, and Nitrobacter winogradskyi is Nitrobacter winogradskyi (Nitrobacter
Winogradskyi) CGMCC No.3390, the spore concentration in Nitrobacter winogradskyi spore liquid is 6 × 109Cfu/L, carboxymethyl
Sodium cellulosate solution is prepared by following methods：Sodium carboxymethylcellulose is mixed with water, the heated sealed in 60 DEG C of water-baths is held
Continuous concussion dissolves sodium carboxymethylcellulose, obtains the carboxymethylcellulose sodium solution that mass concentration is 0.8wt%.
(2.2) step (2.1) gained mixed liquor is added into fermentation medium (15g/L containing glucose, yeast extract 10g/L, egg
White peptone 15g/L, potassium dihydrogen phosphate 0.5g/L, magnesium sulfate 0.5g/L) in, magnetic agitation, magnetic agitation rotating speed are carried out at normal temperatures
It is 500r/min, the time is 48h, obtains the compound degradation agent of rhodamine B degradation dyestuff.
C. the rhodamine B solution of the addition compound degradation agent of step b is entered under the xenon lamp irradiation of visible light source 500W
Row photocatalytic degradation reacts and starts timing, and light source is 20cm with liquid level distance.After after illumination reaction 300min, xenon lamp is closed.
5ml solution is drawn from reacted system, after 5min is centrifuged under the rotating speed of 5000r/min, Aspirate supernatant, with it is ultraviolet can
See in spectrophotometric determination supernatant dyestuff residual concentration and be designated as C.With C/C0It is degradation rate, as a result shows, it is seen that illumination
After penetrating 300min, the compound degradation agent of the present embodiment reaches 78.6% to the rhodamine B degradation efficiency in industrial wastewater, this table
Bright, compound degradation agent of the invention has good industrial applications prospect in rhodamine B degradation waste water.
Finally be necessary described herein be：Above example is served only for making further in detail technical scheme
Ground explanation, it is impossible to be interpreted as limiting the scope of the invention, those skilled in the art's the above of the invention
Some the nonessential modifications and adaptations made belong to protection scope of the present invention.Finally be necessary described herein be：With
Upper embodiment is served only for being described in more detail technical scheme, it is impossible to be interpreted as to the scope of the present invention
Limitation, some nonessential modifications and adaptations that those skilled in the art's the above of the invention is made belong to
Protection scope of the present invention.
Claims (8)
1. a kind of processing method of rhdamine B waste water, comprises the following steps：Given up by compound degradation agent and rhdamine B
The volume ratio of water for 1~2: 100 ratio, by the compound degradation agent of rhodamine B degradation dyestuff be added to concentration for 15mg/L~
In 25mg/L rhdamine B waste water, and the nutrient solution needed for adding Nitrobacter winogradskyi, enter under the xenon lamp of 400W~600W
Row reaction, the liquid level distance of xenon lamp and the rhdamine B waste water is 18cm~22cm, light application time be 270min~
300min, completes the degraded to organic pollution；
The compound degradation agent of the rhodamine B degradation dyestuff is obtained by following methods：
Nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid and carboxymethylcellulose sodium solution are mixed, mixed liquor is obtained, by gained
Mixed liquor is added in fermentation medium, and magnetic agitation is carried out at normal temperatures, and magnetic agitation rotating speed is 400r/min~500r/min,
Time is 48h~72h, obtains the compound degradation agent of rhodamine B degradation dyestuff.
2. the processing method of rhdamine B waste water according to claim 1, it is characterised in that in the nutrient solution, contain
Glucose 10g~15g/L, yeast extract 5g~10g/L, peptone 10g~15g/L, potassium dihydrogen phosphate 0.5g~1g/L, magnesium sulfate
0.4g~0.5g/L.
3. the processing method of rhdamine B waste water according to claim 1, it is characterised in that the fermentation medium
In, 10g containing glucose~15g/L, yeast extract 5g~10g/L, peptone 10g~15g/L, potassium dihydrogen phosphate 0.5g~1g/L,
Magnesium sulfate 0.4g~0.5g/L.
4. the processing method of rhdamine B waste water according to claim 1, it is characterised in that in the mixed liquor, institute
The ratio for stating the spore count in a nanometer bismuth tungstate, Nitrobacter winogradskyi spore liquid is 100g~120g: 5 × 109Cfu~6 ×
109cfu。
5. the processing method of the rhdamine B waste water according to any one of Claims 1 to 4, it is characterised in that described to receive
Rice bismuth tungstate is prepared by following methods：
(1) five water bismuth nitrates and tungstate dihydrate acid sodium are dissolved in the mixed solution of water and ethylene glycol, obtain bismuth tungstate presoma molten
Liquid；Gained bismuth tungstate precursor solution is transferred in hydrothermal reaction kettle, coordination poly-merization is carried out, temperature is 150 DEG C~160
DEG C, the time is 72h~96h, is centrifuged after completion of the reaction, by sediment washing, is dried, and obtains coordination polymer；
(2) coordination polymer obtained by step (1) is carried out into high-temperature heat treatment, temperature is 600 DEG C~650 DEG C, and the time is 2.5h
~3.5h, obtains a nanometer bismuth tungstate.
6. the processing method of rhdamine B waste water according to claim 5, it is characterised in that the bismuth tungstate forerunner
In liquid solution, bismuth nitrate is 2: 1 with the mol ratio of sodium tungstate.
7. the processing method of rhdamine B waste water according to claim 5, it is characterised in that in the step (1),
Sediment is washed using ethanol, 6h~10h is dried in the environment of being 45 DEG C~65 DEG C in temperature.
8. the processing method of the rhdamine B waste water according to any one of claim 1~7, it is characterised in that the dimension
Family name's bacterium nitrobacter is Nitrobacter winogradskyi (Nitrobacter winogradskyi) CGMCC No.3390.
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| CN101623630A (en) * | 2009-07-24 | 2010-01-13 | 中国科学院上海硅酸盐研究所 | Bi*WO*/oxide fiber cloth with multistage heterogeneous structure, method and application |
| JP2012091991A (en) * | 2010-09-30 | 2012-05-17 | Ohara Inc | Glass ceramic, method for producing the same, photocatalyst containing the same, slurry mixture, photocatalyst member, purifying device, filter, sintered compact and glass ceramic composite |
| CN103191723A (en) * | 2013-03-22 | 2013-07-10 | 南开大学 | Hydro-thermal synthesis method of visible light photocatalyst mesoporous Bi2WO6 |
| CN205773495U (en) * | 2016-05-31 | 2016-12-07 | 上海纳晶科技有限公司 | A kind of photoelectrocatalysis purifies water treatment facilities |
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