CN106040213A - TiO2/CNCs composite photocatalyst and preparation method and application thereof - Google Patents
TiO2/CNCs composite photocatalyst and preparation method and application thereof Download PDFInfo
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- CN106040213A CN106040213A CN201610357627.1A CN201610357627A CN106040213A CN 106040213 A CN106040213 A CN 106040213A CN 201610357627 A CN201610357627 A CN 201610357627A CN 106040213 A CN106040213 A CN 106040213A
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 59
- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 239000002091 nanocage Substances 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims abstract description 6
- 238000006731 degradation reaction Methods 0.000 claims abstract description 6
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 29
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 8
- 229960004756 ethanol Drugs 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 7
- 229960000583 acetic acid Drugs 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000013078 crystal Substances 0.000 abstract description 29
- 230000001699 photocatalysis Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000002957 persistent organic pollutant Substances 0.000 abstract 2
- 238000009776 industrial production Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 25
- 238000007146 photocatalysis Methods 0.000 description 11
- 239000000975 dye Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 5
- 238000003760 magnetic stirring Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- ZXJXZNDDNMQXFV-UHFFFAOYSA-M crystal violet Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1[C+](C=1C=CC(=CC=1)N(C)C)C1=CC=C(N(C)C)C=C1 ZXJXZNDDNMQXFV-UHFFFAOYSA-M 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZWYDDDAMNQQZHD-UHFFFAOYSA-L titanium(ii) chloride Chemical compound [Cl-].[Cl-].[Ti+2] ZWYDDDAMNQQZHD-UHFFFAOYSA-L 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 150000001448 anilines Chemical class 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
- B01J21/185—Carbon nanotubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
- B01J20/205—Carbon nanostructures, e.g. nanotubes, nanohorns, nanocones, nanoballs
-
- B01J35/39—
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
-
- 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 a TiO2/CNCs composite photocatalyst. The TiO2/CNCs composite photocatalyst is prepared by loading a certain amount of titanium dioxide on the surface of a carbon nano cage. The invention further discloses a preparation method of the TiO2/CNCs composite photocatalyst and application of the TiO2/CNCs composite photocatalyst to the absorption and degradation of crystal violet dye molecules. The modified TiO2/CNCs composite photocatalyst prepared by the method has the advantages that the specific surface area of the photocatalyst is increased, the absorption ability of the photocatalyst is enhanced, the photocatalytic activity of the photocatalyst is increased, and the photocatalyst can fast degrade organic pollutants in water under ultraviolet and visible light and can absorb and remove the organic pollutants; the TiO2/CNCs composite photocatalyst has strong absorption ability and photocatalytic activity on the crystal violet dye molecules in the water and is good in removing effect. In addition, the preparation method is easy in raw material obtaining, low in cost, mild in reaction condition, free of environment pollution and suitable for industrial production.
Description
Technical field
The present invention relates to a kind of titanium dioxide optical catalyst, particularly relate to a kind of TiO2/ CNCs composite photo-catalyst, also relates to
And above-mentioned TiO2The preparation method and application of/CNCs composite photo-catalyst, belong to photocatalyst field.
Background technology
In recent years, the annual production of China's dyestuff is in sustainable growth.Dye industry belongs to highly energy-consuming, high pollution industry.According to phase
Pass data show, often produce 1t dyestuff, about waste discharge 744m3.Produce in the raw material of dyestuff and mainly have Anthraquinones, aromatic series
The Organic substances such as class, phenyl amines, phenol and nitrobenzene.And during producing dyestuff, substantial amounts of soda acid can be used, as
Really the later stage is dealt with improperly, and these materials, all possibly into waste water from dyestuff, make the COD value of waste water, pH value etc. exceed standard, and then pollutes certainly
So water body, to aquatic animals and plants and the production of the mankind, lives and brings harm.
Nowadays, photocatalysis field develops rapidly, and one of photocatalytic degradation Organic substance photocatalysis research field especially important
Branch.Utilize TiO2Photocatalytically degradating organic dye not only efficiency is high, low cost and environmental protection is reliable.But due to TiO2Taboo
Bandwidth is 3.2ev, can only be excited by the wavelength ultraviolet light less than 380nm；And in sunlight only about 4% ultraviolet
Light, all can not produce response to remaining visible ray of about 96%.It addition, work as TiO2During by solar radiation, by sunlight institute
The electron-hole pair excited is easy to be combined rapidly in inside, and this hinders TiO significantly2Application at actual light catalytic field.
It is thus desirable to TiO2It is modified processing, thus improves its photocatalysis performance.
Summary of the invention
Goal of the invention: the technical problem to be solved is to provide one and has visible light activity and high absorption capacity
TiO2/ CNCs composite photo-catalyst, this photocatalyst not only under ultraviolet light and visible ray all can to light produce response thus
Organic pollution in degradation water, and organic pollution can also be carried out Adsorption.
The present invention also to solve the technical problem that and be to provide above-mentioned TiO2The preparation method of/CNCs composite photo-catalyst.
The present invention finally to solve the technical problem that and be to provide above-mentioned TiO2/ CNCs composite photo-catalyst is tied at absorption degradation
Application in terms of crystalviolet dye molecule.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
A kind of TiO2/ CNCs composite photo-catalyst, described photocatalyst by by a certain amount of titanium dichloride load at carbon
Nanocages surface and prepare.
Above-mentioned TiO2The preparation method of/CNCs composite photo-catalyst, comprises the steps:
Step 1, adds a certain amount of CNCs in dehydrated alcohol, obtains suspension I after stirring；By a certain amount of metatitanic acid
Butyl ester, ethanol and glacial acetic acid mixing, be uniformly mixing to obtain mixed solution I I；
Step 2, is added dropwise over mixed solution I I while stirring in suspension I, is mixed after continuously stirred a period of time
Close liquid A；
Step 3, dripping ammonia to pH of mixed in mixed liquor A is 8, stops dropping and obtains sol B；
Step 4, adds a certain amount of dehydrated alcohol in sol B, by mixed material centrifugation after stirring, then wash,
It is dried to obtain material C；
Step 5, calcines after being ground by material C, obtains TiO2/ CNCs composite photo-catalyst.
Wherein, often adding 1mg CNCs, the volume of required butyl titanate is 0.1～0.2mL.
Wherein, the addition volume ratio of described butyl titanate, ethanol and glacial acetic acid is 5: 10: 2.
Wherein, described baking temperature is 80 DEG C.
Wherein, described calcining heat is 400 DEG C, and calcination time is 2h.
Above-mentioned TiO2The application in terms of the absorption degradation Crystal Violet Dye molecule of/CNCs composite photo-catalyst.
The present invention prepares TiO by colloidal sol-hydrothermal method2/ CNCs composite photo-catalyst, during preparing titanium dioxide
(between 2～100nm, surface texture is similar to porous carbon in the aperture of nano cages, and it has big ratio table to add nano cages
Area), then drip ammonia, make titanium dichloride load on nano cages surface, scrubbed dried calcine in Muffle furnace the most again,
Obtain anatase titanium dioxide composite (TiO2/ CNCs composite photo-catalyst).
Compared to prior art, technical scheme is had the beneficial effect that
First, the TiO that the present invention is modified2/ CNCs composite photo-catalyst specific surface area increases, and absorbability strengthens, light
Catalysis activity improves, not only the organic pollution in equal energy fast degradation water under ultraviolet light and visible ray, moreover it is possible to organic dirt
Dye thing carries out Adsorption；
Secondly, preparation method raw material of the present invention is easy to get, low cost, reaction condition gentle, environmentally safe, is suitable to industry
Metaplasia is produced；
Finally, TiO of the present invention2/ CNCs composite photo-catalyst has extremely strong absorption to Crystal Violet Dye molecule in water body
Ability and photocatalytic activity, removal effect is good.
Accompanying drawing explanation
Fig. 1 is TiO of the present invention2The process chart of/CNCs composite photo-catalyst preparation method；
Fig. 2 is TiO of the present invention2/ CNCs composite photo-catalyst before modified after absorption-ultraviolet catalytic degraded crystal violet effect
Really comparison diagram；
Fig. 3 is TiO of the present invention2/ CNCs composite photo-catalyst before modified after absorption-visible light photocatalytic degradation crystal violet effect
Really comparison diagram.
Detailed description of the invention
Below in conjunction with drawings and Examples, technical scheme is described further, but claimed
Scope be not limited thereto.
Embodiment 1
TiO of the present invention2The preparation method of/CNCs composite photo-catalyst, comprises the steps:
Step 1, adds 0.05g CNCs (nano cages) in 20mL dehydrated alcohol, after magnetic stirrer stirring 30min
Make CNCs reach suspended state, obtain suspension I；10mL butyl titanate, 20mL ethanol and 4mL glacial acetic acid are mixed, stirring
Mixed liquor I I is obtained after 30min；
Step 2, is added dropwise over mixed liquor I I in suspension I while stirring, the most again to mixing after mixing completely
The continuously stirred 2h of material obtains mixed liquor A；
Step 3, is slowly added dropwise ammonia to pH of mixed in mixed liquor A and reaches 8, stops dropping and obtains sol B；
Step 4, addition 10mL dehydrated alcohol in sol B, the suspension centrifugation that will obtain after stirring 30min, then
Wash respectively 2 times with ethanol and deionized water, finally the material after washing is placed in vacuum drying oven at 80 DEG C drying,
To material C；
Step 5, grinds material C and is placed in Muffle furnace at 400 DEG C calcining 2h, obtain TiO2/ CNCs complex light is urged
Agent.
Embodiment 2
TiO of the present invention2The preparation method of/CNCs composite photo-catalyst, comprises the steps:
Step 1, adds 0.1g CNCs (nano cages) in 20mL dehydrated alcohol, makes after magnetic stirrer stirring 30min
CNCs reaches suspended state, obtains suspension I；10mL butyl titanate, 20mL ethanol and 4mL glacial acetic acid are mixed, stirs 30min
After obtain mixed liquor I I；
Step 2, is added dropwise over mixed liquor I I in suspension I while stirring, the most again to mixing after mixing completely
The continuously stirred 2h of material obtains mixed liquor A；
Step 3, is slowly added dropwise ammonia to pH of mixed in mixed liquor A and reaches 8, stops dropping and obtains sol B；
Step 4, addition 10mL dehydrated alcohol in sol B, the suspension centrifugation that will obtain after stirring 30min, then
Wash respectively 2 times with ethanol and deionized water, finally the material after washing is placed in vacuum drying oven at 80 DEG C drying,
To material C；
Step 5, grinds material C and is placed in Muffle furnace at 400 DEG C calcining 2h, obtain TiO2/ CNCs complex light is urged
Agent.
The TiO that embodiment 1,2 is prepared2/ CNCs composite photo-catalyst carries out Crystal Violet absorption-photocatalysis in solution
Remove and test:
Take the crystal violet solution 500mL that initial concentration is 20mg/L, add the TiO that 0.5g embodiment 1 prepares2/ CNCs is multiple
Close photocatalyst, temperature constant magnetic stirring 1h, upon adsorption reach balance after, open ultra violet lamp 50min, carry out photocatalysis real
Test；Treat that experiment terminates, take out solution, and with high speed centrifuge centrifugal after, utilize spectrophotometric to measure crystal violet in solution dense
Degree, according to formula (1)Obtain clearance, wherein, in formula (1): R is clearance (%), C0For crystal violet in solution
Initial concentration (mg/L), Ct is the concentration (mg/L) of crystal violet in solution after absorption-light-catalyzed reaction；Result is as shown in table 1；
Take the crystal violet solution 500mL that initial concentration is 20mg/L, add the TiO that 0.5g embodiment 2 prepares2/ CNCs is multiple
Close photocatalyst, temperature constant magnetic stirring 1h, upon adsorption reach balance after, open ultra violet lamp 50min, carry out photocatalysis real
Test；Treat that experiment terminates, take out solution, and with high speed centrifuge centrifugal after, utilize spectrophotometric to measure crystal violet in solution dense
Degree, obtains clearance, and result is as shown in table 1；
Table 1 is embodiment 1 and the prepared TiO of embodiment 22/ CNCs the composite photo-catalyst removal effect to crystal violet:
| Crystal violet residual concentration (mg/L) in solution | Clearance (%) | |
| The photocatalyst of embodiment 1 | 1.927 | 90.29% |
| The photocatalyst of embodiment 2 | 0.459 | 97.69% |
Can be drawn by table 1, the addition of CNCs (nano cages) is the most, the TiO finally given2/ CNCs complex light is urged
Agent absorption-photocatalysis performance is the best, thus the best to the removal effect of Crystal Violet in solution.
Utilize the TiO that embodiment 2 prepares2/ CNCs composite photo-catalyst and before modified TiO2Photocatalyst carries out crystal violet
Absorption-ultraviolet catalytic is tested:
Taking two parts of 500mL concentration respectively is the crystal violet solution of 20mg/L, adds 0.5g embodiment 2 in a copy of it solution
The TiO prepared2/ CNCs composite photo-catalyst, adds 0.5g TiO in another part of solution2Two parts of solution are carried out by photocatalyst
Temperature constant magnetic stirring 1h, upon adsorption reach balance after, be then turned on ultra violet lamp 50min, carry out photocatalysis experiment, open from experiment
Begin to terminate to experiment, from two parts of solution, take out solution the most respectively, and be centrifuged with high speed centrifuge, utilize light splitting
The concentration of crystal violet in two parts of solution measured by photometer, thus calculates crystal violet concentration and the initial concentration of each time point
Ratio, result is as shown in Figure 2.
Figure it is seen that TiO2/ CNCs and TiO2In degraded crystal violet experimentation, after absorption 1h, crystal violet dense
The ratio of degree and initial concentration is respectively 54.7%, 89.55%, calculates clearance and is respectively 45.3%, 10.45%.Ultraviolet light
After irradiating 50min, the concentration of crystal violet and the ratio of initial concentration are respectively 2.31%, 17.66%, calculate clearance and are respectively
97.69%, 82.34%.Data show, modified TiO2Absorption-the ultraviolet light of crystal violet is urged by/CNCs composite photo-catalyst
Change ability is significantly improved.
Utilize the TiO that embodiment 2 prepares2/ CNCs composite photo-catalyst and TiO before modified2Photocatalyst carries out crystal violet
Absorption-visible light catalytic experiment:
Taking two parts of 500mL concentration respectively is the crystal violet solution of 20mg/L, adds 0.5g embodiment 2 in a copy of it solution
The TiO prepared2/ CNCs composite photo-catalyst, adds 0.5g TiO before modified in another part of solution2Photocatalyst, molten by two parts
Liquid carries out temperature constant magnetic stirring 1h, upon adsorption reach balance after, be then turned on xenon lamp and irradiate 180min, carry out photocatalysis experiment, from
Experiment starts to experiment to terminate, and takes out solution the most respectively, and be centrifuged with high speed centrifuge, profit from two parts of solution
Measure the concentration of crystal violet in two parts of solution with spectrophotometric, thus calculate the crystal violet concentration of each time point with initial
Concentration ratio, result is as shown in Figure 3.
From figure 3, it can be seen that TiO2/ CNCs and TiO2In degraded crystal violet experimentation, after xenon lamp irradiates 180min, knot
The concentration of crystalviolet and the ratio of initial concentration are respectively 15.61%, 87.18%, calculate clearance be respectively 84.39%,
13.82%.Data show, modified TiO2Absorption-visible light catalytic the ability of crystal violet is obtained by/CNCs composite photo-catalyst
To being obviously improved.The G-CoPcS-TiO of modified gained2Absorption-visible light photocatalysis the ability of methylene blue is obtained
It is substantially improved, modified TiO2/ CNCs composite photo-catalyst the most still has the strongest photocatalysis and lives crystal violet
Property, and TiO before modified2Under visible light almost without photocatalytic activity.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and not to the present invention
The restriction of embodiment.For those of ordinary skill in the field, can also be made it on the basis of the above description
The change of its multi-form or variation.Here without also cannot all of embodiment be given exhaustive.And these belong to this
What bright spirit was extended out obviously changes or changes among still in protection scope of the present invention.
Claims (7)
1. a TiO2/ CNCs composite photo-catalyst, it is characterised in that: described photocatalyst is by by a certain amount of titanium dioxide
It is supported on nano cages surface and prepares.
2. the TiO described in claim 12The preparation method of/CNCs composite photo-catalyst, it is characterised in that comprise the steps:
Step 1, adds a certain amount of CNCs in dehydrated alcohol, obtains suspension I after stirring；By a certain amount of butyl titanate,
Ethanol and glacial acetic acid mixing, be uniformly mixing to obtain mixed solution I I；
Step 2, is added dropwise over mixed solution I I while stirring in suspension I, obtains mixed liquor after continuously stirred a period of time
A；
Step 3, dripping ammonia to pH of mixed in mixed liquor A is 8, stops dropping and obtains sol B；
Step 4, adds a certain amount of dehydrated alcohol in sol B, by mixed material centrifugation after stirring, then washs, is dried
Obtain material C；
Step 5, calcines after being ground by material C, obtains TiO2/ CNCs composite photo-catalyst.
TiO the most according to claim 22The preparation method of/CNCs composite photo-catalyst, it is characterised in that: in step 1, often
Adding 1mg CNCs, the volume of required butyl titanate is 0.1～0.2mL.
TiO the most according to claim 22The preparation method of/CNCs composite photo-catalyst, it is characterised in that: in step 1, institute
The addition volume ratio stating butyl titanate, ethanol and glacial acetic acid is 5: 10: 2.
TiO the most according to claim 22The preparation method of/CNCs composite photo-catalyst, it is characterised in that: in step 4, institute
Stating baking temperature is 80 DEG C.
TiO the most according to claim 22The preparation method of/CNCs composite photo-catalyst, it is characterised in that: in step 5, institute
Stating calcining heat is 400 DEG C, and calcination time is 2h.
7. the TiO described in claim 12The application in terms of the absorption degradation Crystal Violet Dye molecule of/CNCs composite photo-catalyst.
Priority Applications (1)
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| CN106378202A (en) * | 2016-11-04 | 2017-02-08 | 河海大学 | H-CNCs/TiO2 composite photocatalyst, and preparation method and application thereof |
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| CN109107599A (en) * | 2018-09-21 | 2019-01-01 | 东华理工大学 | A kind of 3D Gr/g-C3N4Composite material, preparation method and application |
| CN113731390A (en) * | 2021-09-27 | 2021-12-03 | 南通大学 | Spherical HCNs @ TiO2Preparation method of photocatalyst and application of photocatalyst in dye wastewater |
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