CN106732786B - A kind of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst and preparation method thereof - Google Patents
A kind of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalysts and preparation method thereof.The present invention prepares aluminum oxide coating layer using the method for spin coating in substrate, and the photochemical reduction of the carbonyl radical generated by light deposits nano-Ag particles in porous aluminas, 11- Mercaptoundecanoic acid self-assembles on nano-Ag particles, last PORPHYRIN IRON passes through carboxyl-zirconium-carboxyl coordination key, it is connect with 11- Mercaptoundecanoic acid, obtains aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst.Aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst of the invention, photocatalysis efficiency significantly improves, optical response range increases, the degradation of organic pollutant can be achieved under ultraviolet or visible light irradiation, and it can be recycled, preparation method is simple, has broad application prospects in organic pollutant process field.
Description
Technical field
The invention belongs to technical field of environmental science, and in particular to one kind, which can make full use of Uv and visible light degradation, to be had
Aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst of machine pollutant and preparation method thereof.
Background technique
The industrial dyes such as weaving, printing cause serious environmental pollution, and solar energy is as a kind of economic, effective, cleaning
The energy, become one of the energy most with prospects in the world.Titanium dioxide is best semiconductor material, can be using too
The positive inorganic and organic pollutant that can degrade.Titanium dioxide have 3.2eV band gap, but can only absorb ultraviolet light and its less than too
The 5% of positive energy.In order to more effectively utilize solar energy, many researchs are dedicated to developing the photochemical catalyst of visible light-inducing.
Chinese patent 200710300303.5 discloses a kind of visible-light activated titanium dioxide porphyrin nano composite catalyzing
Agent, mixed, be heated to reflux in proportion in a solvent by titanium dioxide nano-particle and tetracarboxylic porphyrin etc., is filtered, washed and
It is made after drying, although improving the photocatalysis performance of titanium dioxide to a certain extent, is not still able to satisfy people couple
Its requirement for putting into practical application.(X.F.Zhou, et.al, Plasmon-Assisted the Degradation of of document 1
Toxic Pollutants with Ag-AgBr/Al2O3Under Visible-Light Irradiation,
J.Phys.Chem.C, 2010) a kind of silver-silver bromide/alumina composite catalyst is reported, by deposition-precipitation by silver-
Silver bromide dispersion be made on alumina, although the catalyst have it is very strong visible light-responded, recycle it is more difficult.Document
2(X.L.He,et.al,Photocatalytic degradation of organic pollutants with Ag
decorated free-standing TiO2nanotube arrays and interface electrochemical
Response, J.Mater.Chem., 2011) a kind of silver/titanium dioxide composite material is reported, pass through electrochemical anodic oxidation
Method preparation, although improving the photocatalysis effect of titanium dioxide to a certain extent, it only has very well under ultraviolet light
Efficiency, cannot utilize extensively.
In recent years, since iron species have high photocatalysis efficiency and unique " green " chemical property, have in catalytic degradation
Unique application prospect is shown in machine pollutant.(Y.P., Huang, et.al, A Novel the β-CD-Hemin of document 3
Complex Photocatalyst for Efficient Degradation of Organic Pollutants at
Neutral pHs under Visible Irradiation, J.Phys.Chem.B, 2003) report a kind of cyclodextrin-porphin
Quinoline iron composite photo-catalyst is combined by beta-cyclodextrin and small molecule PORPHYRIN IRON and is made, since it needs activated hydrogen peroxide
Carry out oxidative degradation pollutant, cannot largely come into operation.
Summary of the invention
The purpose of the present invention is to provide a kind of oxidations that can make full use of Uv and visible light degradable organic pollutant
Aluminium/silver-PORPHYRIN IRON composite photo-catalyst and preparation method thereof.
In order to realize goal of the invention, technical scheme is as follows:
A kind of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst, the composite photo-catalyst by porous oxidation aluminized coating,
Silver nano-grain and PORPHYRIN IRON composition, the silver nano-grain are deposited in porous oxidation aluminized coating, the porphyrin Tie Tong
It crosses 11- Mercaptoundecanoic acid and is fixed on silver nano-grain surface.
The present invention also provides the preparation methods of above-mentioned aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst, the specific steps are as follows:
Step 1, the preparation of aluminum oxide coating layer: AlOOH colloidal sol being spun in clean substrate, it is dry after with 3~5 DEG C/
The heating rate of min rises to 510~550 DEG C, after heat preservation, and porous oxidation aluminized coating is made;
Step 2, using tetrahydrofuran as solvent, Silver Trifluoroacetate solution, 2- hydroxyl -4'- (2- hydroxyl the preparation of solution: are prepared
Ethyoxyl) -2- methyl phenyl ketone solution and cetylamine solution, three kinds of solution are then mixed to get reaction solution;
Step 3, the fixation of silver nano-grain: porous oxidation aluminized coating is immersed in reaction solution, is irradiated under ultraviolet light, instead
Coating is taken out after answering, and obtains aluminium oxide/silver composite material after washing, drying;
Step 4, aluminium oxide/silver composite material aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst preparation: is immersed in 11-
In the ethanol solution of Mercaptoundecanoic acid, after rinsing, drying, aluminium oxide/silver composite material of 11- Mercaptoundecanoic acid will be loaded
It is immersed in the ethanol solution of eight water oxygen zirconium chlorides, rinsing, drying, it finally will load 11- Mercaptoundecanoic acid and eight water oxygen chlorine
Change zirconium aluminium oxide/silver composite material immerse PORPHYRIN IRON dimethyl sulphoxide solution in, rinsing, drying, finally be made aluminium oxide/
Silver-PORPHYRIN IRON composite photo-catalyst.
Wherein, in step 1, AlOOH and the mass ratio of deionized water are 1:5~10 in the AlOOH colloidal sol, described
Substrate is selected from one of glass, electro-conductive glass, quartz and silicon wafer, and the drying temperature is 50~100 DEG C, the heat preservation
Time is 2~3.5h.
In step 2, the Silver Trifluoroacetate solution, 2- hydroxyl -4'- (2- hydroxy ethoxy) -2- methyl phenyl ketone solution
Concentration with cetylamine solution is 0.5~1.0mM.
In step 3, the time irradiated under the ultraviolet light is 1~30min.
In step 4, the concentration of the ethanol solution of the 11- Mercaptoundecanoic acid is 0.5~1.0mM, soaking time 8
~12h;The concentration of the ethanol solution of the eight water oxygen zirconium chlorides is 0.5~1.0mM, and soaking time is 0.5~1h;Described
The concentration of the dimethyl sulphoxide solution of PORPHYRIN IRON is 0.25~0.5mM, and soaking time is 0.5~1h.
Compared with prior art, remarkable result of the invention are as follows: the aluminum oxide coating layer large specific surface area in the present invention uses
Nano silver is uniformly distributed in aluminum oxide coating layer by photoreduction met hod, increases the load capacity of silver nano-grain, and pass through 11- sulfydryl ten
One alkanoic acid connects PORPHYRIN IRON, provides more active sites, and photocatalysis efficiency significantly improves, and optical response range increases, ultraviolet or
The degradation of organic pollutant can be achieved under the irradiation of visible light, and can be recycled, have in organic pollutant process field
Have broad application prospects.
Detailed description of the invention
Fig. 1 is aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst preparation flow schematic diagram of the invention.
Fig. 2 is aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst SEM figure in embodiment 1.
Fig. 3 be embodiment 5 under the conditions of ultraviolet methyl orange concentration versus time curve figure.
Fig. 4 is in embodiment 6 in visible condition Methyl Orange concentration versus time curve figure.
Fig. 5 be embodiment 7 under the conditions of visible acid red 18 concentration versus time curve figure.
Fig. 6 is the UV-visible absorption spectrum of acid red 18 in embodiment 8.
Fig. 7 is the repetition lab diagram of the photocatalytic degradation of acid red 18 in embodiment 9.
Fig. 8 is the change of methyl orange concentration at any time when aluminium oxide/PORPHYRIN IRON is catalyst under visible light conditions in comparative example 1
Change curve graph.
Specific embodiment
Below with reference to embodiment and attached drawing, the invention will be further described.
Embodiment 1
The AlOOH that mass ratio is 1:10 is mixed with deionized water, stirs evenly, finally obtains transparent leucosol.
By obtained colloidal sol drop in clean glass sheet surface, it is spin-coated in substrate with sol evenning machine with the revolving speed of 5000rev/min, in
Dry 10min at 50 DEG C.Dried substrate is put into Muffle furnace, 550 DEG C is risen to 5 DEG C/min rate, keeps the temperature 2h, finally
Porous oxidation aluminized coating is obtained.Using tetrahydrofuran as solvent, Silver Trifluoroacetate solution, the 2- that 5mL concentration is 0.5mM are prepared
Then three kinds of solution are mixed to get reaction by hydroxyl -4'- (2- hydroxy ethoxy) -2- methyl phenyl ketone solution and cetylamine solution
Liquid.Aluminum oxide coating layer is immersed in reaction solution, 20min is irradiated under 100w high-pressure sodium lamp, takes out coating after reaction, is used
Deionized water is rinsed, and is dried in air, and aluminium oxide/silver composite material is just obtained.Aluminium oxide/silver composite material is immersed in
12h in the ethanol solution of the 11- Mercaptoundecanoic acid of 0.5mM, reaction are completed to be drawn off being rinsed with ethyl alcohol, air drying.
It is immersed in 1h in the ethanol solution of the eight water oxygen zirconium chlorides of 0.5mM again, reaction terminates to be drawn off being rinsed with ethyl alcohol, do in air
It is dry.It is finally dipped in 1h in the dimethyl sulphoxide solution of the PORPHYRIN IRON of 0.25mM, is rinsed with deionized water, is done in air
It is dry, finally obtain aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst.
Fig. 2 is aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst SEM figure, and silver-PORPHYRIN IRON is in stub as can be seen from Figure
Shape structure, and be embedded in the porous structure of aluminium oxide.
Embodiment 2
The AlOOH that mass ratio is 1:5 is mixed with deionized water, stirs evenly, finally obtains transparent leucosol.It will
Obtained colloidal sol drop is spin-coated in substrate with sol evenning machine with the revolving speed of 5000rev/min in clean glass sheet surface, in
Dry 10min at 100 DEG C.Dried substrate is put into Muffle furnace, 510 DEG C is risen to 3 DEG C/min rate, keeps the temperature 3.5h,
Porous oxidation aluminized coating is finally obtained.Using tetrahydrofuran as solvent, preparation 5mL concentration is that the Silver Trifluoroacetate of 0.5mM is molten
Three kinds of solution, are then mixed to get by liquid, 2- hydroxyl -4'- (2- hydroxy ethoxy) -2- methyl phenyl ketone solution and cetylamine solution
Reaction solution.Aluminum oxide coating layer is immersed in reaction solution, 20min is irradiated under 100w high-pressure sodium lamp, takes out apply after reaction
Layer, is rinsed, and dried in air with deionized water, just obtains aluminium oxide/silver composite material.Aluminium oxide/the silver composite material
It is immersed in 12h in the ethanol solution of the 11- Mercaptoundecanoic acid of 0.5mM, reaction is completed to be drawn off being rinsed with ethyl alcohol, in air
It is dry.It is immersed in 1h in the ethanol solution of the eight water oxygen zirconium chlorides of 0.5mM again, reaction terminates to be drawn off being rinsed with ethyl alcohol, empty
It is dry in gas.It is finally dipped in 1h in the dimethyl sulphoxide solution of the PORPHYRIN IRON of 0.25mM, is rinsed with deionized water, in air
Middle drying has finally obtained aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst.
Embodiment 3
The AlOOH that mass ratio is 1:10 is mixed with deionized water, stirs evenly, finally obtains transparent leucosol.
By obtained colloidal sol drop in clean glass sheet surface, it is spin-coated in substrate with sol evenning machine with the revolving speed of 5000rev/min, in
Dry 10min at 50 DEG C.Dried substrate is put into Muffle furnace, 550 DEG C is risen to 5 DEG C/min rate, keeps the temperature 2h, finally
Porous oxidation aluminized coating is obtained.Using tetrahydrofuran as solvent, Silver Trifluoroacetate solution, the 2- that 5mL concentration is 1.0mM are prepared
Then three kinds of solution are mixed to get reaction by hydroxyl -4'- (2- hydroxy ethoxy) -2- methyl phenyl ketone solution and cetylamine solution
Liquid.Aluminum oxide coating layer is immersed in reaction solution, 1min is irradiated under 100w high-pressure sodium lamp, takes out coating after reaction, is used
Deionized water is rinsed, and is dried in air, and aluminium oxide/silver composite material is just obtained.Aluminium oxide/the silver composite material is immersed in
8h in the ethanol solution of the 11- Mercaptoundecanoic acid of 1.0mM, reaction are completed to be drawn off being rinsed with ethyl alcohol, air drying.Again
It is immersed in 0.5h in the ethanol solution of the eight water oxygen zirconium chlorides of 1.0mM, reaction terminates to be drawn off being rinsed with ethyl alcohol, do in air
It is dry.It is finally dipped in 0.5h in the dimethyl sulphoxide solution of the PORPHYRIN IRON of 0.5mM, is rinsed with deionized water, is done in air
It is dry, finally obtain aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst.
Embodiment 4
The AlOOH that mass ratio is 1:10 is mixed with deionized water, stirs evenly, finally obtains transparent leucosol.
By obtained colloidal sol drop in clean glass sheet surface, it is spin-coated in substrate with sol evenning machine with the revolving speed of 5000rev/min, in
Dry 10min at 100 DEG C.Dried substrate is put into Muffle furnace, 510 DEG C is risen to 3 DEG C/min rate, keeps the temperature 3.5h,
Porous oxidation aluminized coating is finally obtained.Using tetrahydrofuran as solvent, preparation 5mL concentration is that the Silver Trifluoroacetate of 1.0mM is molten
Three kinds of solution, are then mixed to get by liquid, 2- hydroxyl -4'- (2- hydroxy ethoxy) -2- methyl phenyl ketone solution and cetylamine solution
Reaction solution.Aluminum oxide coating layer is immersed in reaction solution, 30min is irradiated under 100w high-pressure sodium lamp, takes out apply after reaction
Layer, is rinsed, and dried in air with deionized water, just obtains aluminium oxide/silver composite material.Aluminium oxide/the silver composite material
It is immersed in 8h in the ethanol solution of the 11- Mercaptoundecanoic acid of 1.0mM, reaction is completed to be drawn off being rinsed with ethyl alcohol, in air
It is dry.It is immersed in 0.5h in the ethanol solution of the eight water oxygen zirconium chlorides of 1.0mM again, reaction terminates to be drawn off being rinsed with ethyl alcohol,
Air drying.It is finally dipped in 0.5h in the dimethyl sulphoxide solution of the PORPHYRIN IRON of 0.5mM, is rinsed with deionized water,
Air drying has finally obtained aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst.
Embodiment 5
The preparation of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is the same as embodiment 1.
The initial concentration of methyl orange is 10mg/L, and aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is dipped into methyl orange water
In solution, 2h is irradiated under 100w high-pressure sodium lamp, separated in time takes a certain amount of MO aqueous solution, uses ultraviolet specrophotometer
The concentration of solution is tested, and then obtains its degradation rate.As shown in figure 3, after 2h, methyl orange drops the degradation curve of MO under ultraviolet light
Solve 85%.
Embodiment 6
The preparation of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is the same as embodiment 1.
The initial concentration of methyl orange is 10mg/L, and aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is dipped into methyl orange water
In solution, 2h is irradiated under 300w xenon lamp, separated in time takes a certain amount of MO aqueous solution, tested with ultraviolet specrophotometer
The concentration of solution, and then obtain its degradation rate.MO degradation curve under visible light is as shown in figure 4, after 2h, methyl orange degradation
70%.
Embodiment 7
The preparation of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is the same as embodiment 1.
The initial concentration of acid red 18 is 10mg/L, and aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is dipped into acid red
In 18 aqueous solutions, 2h is irradiated under 300w xenon lamp, separated in time takes a certain amount of acid red 18 aqueous solution, uses ultraviolet spectrometry
Photometer tests the concentration of solution, and then obtains its degradation rate.Acid red 18 degradation curve under visible light as shown in figure 5,
After 2h, acid red 18 degrades 80%.
Embodiment 8
The preparation of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is the same as embodiment 1.
The initial concentration of acid red 18 is 10mg/L, and aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is dipped into acid red
In 18 aqueous solutions, 2h is irradiated under 100w high-pressure sodium lamp, separated in time takes a certain amount of acid red 18 aqueous solution, and use is ultraviolet
Spectrophotometer tests solution absorbance.The uv-visible absorption spectra of acid red 18 is as shown in fig. 6, with light application time
Extend, the absorbance of acid red 18 reduces.
Embodiment 9
The preparation of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is the same as embodiment 1.
The initial concentration of acid red 18 is 10mg/L, and aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst is dipped into acid red
In 18 aqueous solutions, 2h is irradiated under 100w high-pressure sodium lamp, separated in time takes a certain amount of acid red 18 aqueous solution, and use is ultraviolet
Spectrophotometer tests the concentration of solution, and then obtains its degradation rate.The composite material tested is impregnated in deionized water
Ultrasonic 5min takes out drying later, and it is in 10mg/L acid red 18 aqueous solution, with purple that the composite material, which is dipped into concentration, again
The concentration of outer spectrophotometer test solution, and then obtain its degradation rate.It is repeated four times.The weight of the photocatalytic degradation of acid red 18
As shown in fig. 7, after 5 reuses, the degradation effect of composite photo-catalyst is not substantially reduced multiple experimental result.
Comparative example 1
The AlOOH that mass ratio is 1:10 is mixed with deionized water, stirs evenly, finally obtains transparent leucosol.
By obtained colloidal sol drop in clean glass sheet surface, it is spin-coated in substrate with sol evenning machine with the revolving speed of 5000rev/min, in
Dry 10min at 50 DEG C.Dried substrate is put into Muffle furnace, 550 DEG C is risen to 5 DEG C/min rate, keeps the temperature 2h, finally
Porous oxidation aluminized coating is obtained.Aluminum oxide coating layer is immersed in 1h in the dimethyl sulphoxide solution of the PORPHYRIN IRON of 0.25mM, is used
Deionized water is rinsed, and is dried in air, has been finally obtained aluminium oxide/porphyrin iron composite material.
The initial concentration of methyl orange is 10mg/L, and aluminium oxide/porphyrin iron composite material is dipped into methyl orange aqueous solution,
2h is irradiated under 300w xenon lamp, separated in time takes a certain amount of MO aqueous solution, with ultraviolet specrophotometer test solution
Concentration, and then obtain its degradation rate.As shown in figure 8, after 2h, methyl orange only degrades the degradation curve of MO under visible light
12%.
Claims (7)
1. a kind of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst, which is characterized in that the composite photo-catalyst is by porous oxygen
Change aluminized coating, silver nano-grain and PORPHYRIN IRON composition, the silver nano-grain is deposited in porous oxidation aluminized coating, described
PORPHYRIN IRON is fixed on silver nano-grain surface by 11- Mercaptoundecanoic acid and eight water oxygen zirconium chlorides.
2. a kind of method for preparing aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst as described in claim 1, which is characterized in that
Specific step is as follows:
Step 1, the preparation of aluminum oxide coating layer: AlOOH colloidal sol being spun in clean substrate, with 3~5 DEG C/min's after drying
Heating rate rises to 510~550 DEG C, after heat preservation, and porous oxidation aluminized coating is made;
Step 2, the preparation of solution: using tetrahydrofuran as solvent, Silver Trifluoroacetate solution, 2- hydroxyl -4'- (2- hydroxyl are prepared respectively
Ethyoxyl) -2- methyl phenyl ketone solution and cetylamine solution, three kinds of solution are then mixed to get reaction solution;
Step 3, the fixation of silver nano-grain: porous oxidation aluminized coating is immersed in reaction solution, is irradiated under ultraviolet light, reaction knot
Coating is taken out after beam, obtains aluminium oxide/silver composite material after washing, drying;
Step 4, aluminium oxide/silver composite material aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst preparation: is immersed in 11- sulfydryl
In the ethanol solution of hendecanoic acid, after rinsing, drying, the aluminium oxide/silver composite material for loading 11- Mercaptoundecanoic acid is impregnated
In the ethanol solution of eight water oxygen zirconium chlorides, rinsing, drying finally will load 11- Mercaptoundecanoic acid and eight water oxygen zirconium chlorides
Aluminium oxide/silver composite material immerse PORPHYRIN IRON dimethyl sulphoxide solution in, rinsing, drying, finally be made aluminium oxide/silver-
PORPHYRIN IRON composite photo-catalyst.
3. the preparation method of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst according to claim 2, which is characterized in that step
In rapid 1, AlOOH and the mass ratio of deionized water are 1:5~10 in the AlOOH colloidal sol, and the substrate is selected from glass, leads
One of electric glass, quartz and silicon wafer, the drying temperature are 50~100 DEG C, and the soaking time is 2~3.5h.
4. the preparation method of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst according to claim 2, which is characterized in that step
In rapid 2, the Silver Trifluoroacetate solution, 2- hydroxyl -4'- (2- hydroxy ethoxy) -2- methyl phenyl ketone solution and cetylamine are molten
The concentration of liquid is 0.5~1.0mM.
5. the preparation method of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst according to claim 2, which is characterized in that step
In rapid 3, the time irradiated under the ultraviolet light is 1~30min.
6. the preparation method of aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst according to claim 2, which is characterized in that step
In rapid 4, the concentration of the ethanol solution of the 11- Mercaptoundecanoic acid is 0.5~1.0mM, and soaking time is 8~12h;It is described
Eight water oxygen zirconium chlorides ethanol solution concentration be 0.5~1.0mM, soaking time be 0.5~1h;The two of the PORPHYRIN IRON
The concentration of methyl sulfoxide solution is 0.25~0.5mM, and soaking time is 0.5~1h.
7. aluminium oxide/silver-PORPHYRIN IRON composite photo-catalyst according to claim 1 answering in organic pollutant processing
With.
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CN101195094A (en) * | 2007-12-24 | 2008-06-11 | 吉林大学 | Visible light activated titanium dioxide porphyrin nano composite catalyst and method for producing the same |
CN102192938A (en) * | 2010-03-19 | 2011-09-21 | 黄炳照 | Homogeneous compound catalyst/enzyme structure, fabricating method thereof and application thereof |
WO2015134204A1 (en) * | 2014-03-07 | 2015-09-11 | University Of Cincinnati | Silver nanoparticle-enhanced photosensitizers |
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