CN105944673A - Preparation method of TiO2/active carbon net-loaded adsorption- photocatalysis water purifying composite material - Google Patents
Preparation method of TiO2/active carbon net-loaded adsorption- photocatalysis water purifying composite material Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 136
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000002131 composite material Substances 0.000 title claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 16
- 230000001699 photocatalysis Effects 0.000 title description 2
- 239000004677 Nylon Substances 0.000 claims abstract description 34
- 229920001778 nylon Polymers 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000008187 granular material Substances 0.000 claims description 47
- 239000007864 aqueous solution Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 24
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 22
- 238000010521 absorption reaction Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- 239000003610 charcoal Substances 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003760 magnetic stirring Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 15
- 238000006731 degradation reaction Methods 0.000 abstract description 15
- 239000000843 powder Substances 0.000 abstract description 11
- 239000010865 sewage Substances 0.000 abstract description 6
- 239000003054 catalyst Substances 0.000 abstract description 5
- 238000011109 contamination Methods 0.000 abstract description 4
- 239000011941 photocatalyst Substances 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 23
- 239000000463 material Substances 0.000 description 13
- 238000012545 processing Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 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 4
- 238000010586 diagram Methods 0.000 description 4
- 229960000907 methylthioninium chloride Drugs 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- JNRLEMMIVRBKJE-UHFFFAOYSA-N 4,4'-Methylenebis(N,N-dimethylaniline) Chemical compound C1=CC(N(C)C)=CC=C1CC1=CC=C(N(C)C)C=C1 JNRLEMMIVRBKJE-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- -1 hydroxyl radical free radical Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 230000003313 weakening effect Effects 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
- 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
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- 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
- C02F1/30—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
Abstract
The invention provides a preparation method of a TiO2/active carbon net-loaded adsorption-photocatalysis water purifying composite material, and relates to a preparation method of an adsorption-photocatalysis water purifying composite material. The preparation method provided by the invention is used for solving the technical problem that a TiO2 photocatalysed powder suspended phase catalyst is not easy to recycle, is liable to coagulate to cause secondary pollution, and has poor treatment effect on water body low concentration organic contamination. The preparation method comprises the steps of first, pre-treating active carbon; second, preparing TiO2/active carbon composite powder; third, loading the composite powder to a net. The preparation method has the following advantages: active carbon with excellent adsorbability is combined with a TiO2 photocatalyst to prepare adsorption-photocatalysis composite powder, and the powder is loaded to the nylon net, so as to effectively treat a wide water area and realize recycle. Placing the composite material provided by the invention into sewage, and naturally treating for 12 hours, the organic matter degradation rate reaches not less than 90 percent. The preparation method is applied to the field of water treatment.
Description
Technical field
The present invention relates to the preparation method of a kind of absorption-photocatalysis water-purifying composite.
Background technology
The processing method of organic pollutants in water body mainly has: microbial method, Physical and chemical method.(1) microbial method is to poison
Some artificial synthetic organic materials that property is high are helpless.(2) the difficult life of the adsorbent of absorption method in Physical, vaporizing extract process discomfort
Reclaim difficulty for low concentration pollution, solvent extraction extractant and produce at secondary pollution, ion exchange and membrane separation process
Reason water body in large energy consumption is too high.(3) in chemical method, burning method uses that reagent cost is too high, micro-electrolysis method there is also energy consumption mistake
High problem.
TiO2Photocatalysis is that a kind of degree of purification is high, applied widely, do not produce secondary pollution and chemical treatment side that energy consumption is low
Method.It mainly hinders and is: (1) powder suspended phase catalyst is not easily recycled, and easily cohesion causes secondary pollution；(2) right
In water body low concentration (μ g/L or ng/L) organic contamination poor processing effect.
The Chinese invention patent application of Publication No. CN1587116 describes a kind of nano-TiO processing sewage2Net, it is main
Acting on is the high-concentration sewage of discharge in processing plant, but the technological process of complexity can not be substantial amounts of contaminated for processing
Lake Water.The Chinese invention patent application of Publication No. CN204952919U describes and processes low concentration city under a kind of room temperature
The activated carbon base nano-TiO of volatile organic contaminant (TVOC) in interior air2Material, but it is organic to process water body
Thing.
Summary of the invention
The present invention is to solve TiO2Light-catalysed powder suspended phase catalyst is not easily recycled, and easily cohesion causes secondary dirty
Dye, and for the technical problem of water body low concentration organic contamination poor processing effect, and provide a kind of net to carry TiO2/ activated carbon
The preparation method of absorption-photocatalysis water-purifying composite.
A kind of net of the present invention carries TiO2The preparation method of the absorption of/activated carbon-photocatalysis water-purifying composite is by following step
Suddenly carry out:
One, Activated Carbon Pretreatment: be the HNO of 17% by granular active carbon and volume fraction3Aqueous solution uniformly mixes, then
With magnetic stirring apparatus heated and stirred 1h～3h under conditions of temperature is 100 DEG C, then by distilled water filtering and washing 6 times～7 times,
In the air drier that temperature is 80 DEG C, it is dried 2h, obtains the activated carbon that pretreatment is complete；The matter of described granular active carbon
Amount and volume fraction are the HNO of 17%3The volume ratio of aqueous solution is 1g:(35mL～45mL)；
Two, TiO2Prepared by/activated carbon composite granule: activated carbon complete for pretreatment in step one is added P25 type TiO2Water
In solution, it is put in ultrasonic washing instrument and vibrates to no longer having bubble to emerge from activated carbon granule, the most in the dark stir
Mix 1h, filter, be then placed in electrically heated drying cabinet, under conditions of temperature is 110 DEG C, dries 2h, is 500 DEG C in temperature
Muffle furnace under heat treatment 1h, naturally cool to room temperature, obtain TiO2/ activated carbon composite granule；Described P25 type TiO2
Aqueous solution in P25 type TiO2Concentration more than or equal to 500mg/L and less than or equal to 1000mg/L；In described step one
The quality of the activated carbon that pretreatment is complete and P25 type TiO2The volume ratio of aqueous solution be 1g:(60mL～70mL)；
Three, net load composite granule: be coated with last layer waterproof gel, the TiO then step 2 obtained on nylon wire2/ live
On property charcoal composite granule uniform fold waterproof gel on nylon wire, the TiO of covering2/ activated carbon composite granule thickness is
1mm～2mm, i.e. completes net and carries TiO2The preparation of the absorption of/activated carbon-photocatalysis water-purifying composite；Buddhist nun described in composition
The diameter of section of the nylon rope of dragon net is 2mm～20mm.
Advantages of the present invention:
The present invention will be provided with activated carbon and the TiO of excellent adsorptivity2Photocatalyst combines, and prepares absorption-photocatalysis and is combined
Powder body, loads this powder body on nylon wire, can effectively process wide waters and achieve recovery and use.
The present invention is easily combined in view of light induced electron, hole, and the hydroxyl radical free radical time-to-live is shorter, and pollutant need to move rapidly
Move to catalyst surface and hole and hydroxyl radical reaction；Titanium dioxide absorption affinity when pollutant levels are relatively low in pollution territory, lake
More weak, auxiliary absorption need to be carried out；Activated carbon adsorptive capacity is strong, preparation technology is simple, with low cost.
The TiO of the present invention2/ activated carbon composite granule has the advantage that (1) promotes that pollutant migrate to adsorbent from aqueous phase,
Transfer to catalyst surface；(2) degraded can make adsorbent (activated carbon) use continuously timely；(3) is produced from centre
Thing is adsorbed to surface, the most degradable；(4) electric conductivity of activated carbon accelerates the separation of electron-hole pair, thus carries
The catalysis activity of high photocatalyst；(5) reunion is reduced, it is simple to separate.
Owing to composite powder material is not easily recycled in aqueous environment, and flexible material resistance in aqueous environment is less, necessarily
Weakening the current souring to composite granule in degree, the present invention utilizes waterproof gel to realize composite granule on nylon rope
Be uniformly distributed, can make composite granule reach recycle purpose, select nylon wire is anticorrosive, tensile strength is higher, become
This is cheap.
The net carrier material Consideration of the present invention is as follows:
(1) glue material
Owing to long period of soaking is in aqueous environment, it is desirable to colloid is water insoluble, anticorrosion, be difficult to after adhesive good, adhesion solid
Changing, easily obtain relatively by force, can bond with various material, waterproof gel all meets above-mentioned condition.Typical commercial product is entitled " anti-
Water is precious ", it is made up through special process of inorganic silicate, imported with original packaging high molecular polymer and filler etc.；
(2) net materials kind
Flexible material resistance in aqueous environment is less, weakens the current souring to composite granule to a certain extent, because of
This should select anticorrosive, wear-resisting, heat-resisting, weak acid resistant, tensile strength are higher and non-pigment.White Nylon material (polyamide)
All it is combined above-mentioned requirements；
(3) net materials diameter and aperture
If net materials diameter is less, comparatively dense web frame after braiding, can be formed, cause the seepage of water of net materials to strongly reduce.
During net sink-float, strengthen the rubbing action of water body and net materials so that composite granule serious wear.The most too small
Diameter cannot load more complex carrier, affects catalytic efficiency equally.Therefore diameter is the most suitable 2～20mm.
The net of the present invention is carried TiO2The absorption of/activated carbon-photocatalysis water-purifying composite is put in sewage, through 12h from
So processing, degradation effect of organic compound reaches more than 90%.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of the nylon wire of the present invention, and 1 is the nylon rope of composition nylon wire, and net establishment becomes equilateral triangle
Hole, a length of 10mm～300mm of triangle edges；
Fig. 2 is the schematic diagram of the nylon wire of the present invention, and 1 is the nylon rope of composition nylon wire, and net establishment becomes square hole,
The square length of side is 10mm～300mm；
Fig. 3 obtains TiO for test one step 22The SEM figure of/activated carbon composite granule；
Fig. 4 obtains TiO for test two step 22The SEM figure of/activated carbon composite granule；
Fig. 5 is the process methylene blue degradation curve figure of test one, and direction of arrow representative processes the increase of time；
Fig. 6 is to process methylene blue degradation rate comparison diagram, and curve 1 is test one, and curve 2 is test two.
Detailed description of the invention
Detailed description of the invention one: present embodiment is that a kind of net carries TiO2The absorption of/activated carbon-photocatalysis water-purifying composite
Preparation method, is carried out the most according to the following steps:
One, Activated Carbon Pretreatment: be the HNO of 17% by granular active carbon and volume fraction3Aqueous solution uniformly mixes, then
With magnetic stirring apparatus heated and stirred 1h～3h under conditions of temperature is 100 DEG C, then by distilled water filtering and washing 6 times～7 times,
In the air drier that temperature is 80 DEG C, it is dried 2h, obtains the activated carbon that pretreatment is complete；The matter of described granular active carbon
Amount and volume fraction are the HNO of 17%3The volume ratio of aqueous solution is 1g:(35mL～45mL)；
Two, TiO2Prepared by/activated carbon composite granule: activated carbon complete for pretreatment in step one is added P25 type TiO2Water
In solution, it is put in ultrasonic washing instrument and vibrates to no longer having bubble to emerge from activated carbon granule, the most in the dark stir
Mix 1h, filter, be then placed in electrically heated drying cabinet, under conditions of temperature is 110 DEG C, dries 2h, is 500 DEG C in temperature
Muffle furnace under heat treatment 1h, naturally cool to room temperature, obtain TiO2/ activated carbon composite granule；Described P25 type TiO2
Aqueous solution in P25 type TiO2Concentration more than or equal to 500mg/L and less than or equal to 1000mg/L；In described step one
The quality of the activated carbon that pretreatment is complete and P25 type TiO2The volume ratio of aqueous solution be 1g:(60mL～70mL)；
Three, net load composite granule: be coated with last layer waterproof gel, the TiO then step 2 obtained on nylon wire2/ live
On property charcoal composite granule uniform fold waterproof gel on nylon wire, the TiO of covering2/ activated carbon composite granule thickness is
1mm～2mm, i.e. completes net and carries TiO2The preparation of the absorption of/activated carbon-photocatalysis water-purifying composite；Buddhist nun described in composition
The diameter of section of the nylon rope of dragon net is 2mm～20mm.
Detailed description of the invention two: present embodiment is unlike detailed description of the invention one: the seed activity described in step one
The quality of charcoal and volume fraction are the HNO of 17%3The volume ratio of aqueous solution is 1g:41.7mL.Other and detailed description of the invention
One is identical.
Detailed description of the invention three: present embodiment is unlike detailed description of the invention one: the P25 type described in step 2
TiO2Aqueous solution in P25 type TiO2Concentration be 500mg/L.Other are identical with detailed description of the invention one.
Detailed description of the invention four: present embodiment is unlike detailed description of the invention one: in the step one described in step 2
The quality of the activated carbon that pretreatment is complete and P25 type TiO2The volume ratio of aqueous solution be 1g:66.7mL.Other are real with concrete
Execute mode one identical.
Detailed description of the invention five: present embodiment is unlike detailed description of the invention one: form described nylon in step 3
The diameter of section of the nylon rope of net is 10mm.Other are identical with detailed description of the invention one.
The effect of the employing tests below checking present invention:
Test one: this test is that a kind of net carries TiO2The preparation method of the absorption of/activated carbon-photocatalysis water-purifying composite, tool
Body is carried out according to the following steps:
One, Activated Carbon Pretreatment: be the HNO of 17% by granular active carbon and volume fraction3Aqueous solution uniformly mixes, then
By magnetic stirring apparatus heated and stirred 2h under conditions of temperature is 100 DEG C, then by distilled water filtering and washing 7 times, in temperature it is
The air drier of 80 DEG C is dried 2h, obtains the activated carbon that pretreatment is complete；The quality of described granular active carbon and volume
Mark is the HNO of 17%3The volume ratio of aqueous solution is 1g:41.7mL；
Two, TiO2Prepared by/activated carbon composite granule: activated carbon complete for pretreatment in step one is added P25 type TiO2Water
In solution, it is put in ultrasonic washing instrument and vibrates to no longer having bubble to emerge from activated carbon granule, the most in the dark stir
Mix 1h, filter, be then placed in electrically heated drying cabinet, under conditions of temperature is 110 DEG C, dries 2h, is 500 DEG C in temperature
Muffle furnace under heat treatment 1h, naturally cool to room temperature, obtain TiO2/ activated carbon composite granule；Described P25 type TiO2
Aqueous solution in P25 type TiO2Concentration be 500mg/L；In described step one quality of the activated carbon that pretreatment is complete with
P25 type TiO2The volume ratio of aqueous solution be 1g:66.7mL；
Three, net load composite granule: be coated with last layer waterproof gel, the TiO then step 2 obtained on nylon wire2/ live
On property charcoal composite granule uniform fold waterproof gel on nylon wire, the TiO of covering2/ activated carbon composite granule thickness is
1.5mm, i.e. completes net and carries TiO2The preparation of the absorption of/activated carbon-photocatalysis water-purifying composite；Nylon wire described in composition
The diameter of section of nylon rope be 10mm.
Test two: this test is that a kind of net carries TiO2The preparation method of the absorption of/activated carbon-photocatalysis water-purifying composite, tool
Body is carried out according to the following steps:
One, Activated Carbon Pretreatment: be the HNO of 17% by granular active carbon and volume fraction3Aqueous solution uniformly mixes, then
By magnetic stirring apparatus heated and stirred 2h under conditions of temperature is 100 DEG C, then by distilled water filtering and washing 7 times, in temperature it is
The air drier of 80 DEG C is dried 2h, obtains the activated carbon that pretreatment is complete；The quality of described granular active carbon and volume
Mark is the HNO of 17%3The volume ratio of aqueous solution is 1g:41.7mL；
Two, TiO2Prepared by/activated carbon composite granule: activated carbon complete for pretreatment in step one is added P25 type TiO2Water
In solution, it is put in ultrasonic washing instrument and vibrates to no longer having bubble to emerge from activated carbon granule, the most in the dark stir
Mix 1h, filter, be then placed in electrically heated drying cabinet, under conditions of temperature is 110 DEG C, dries 2h, is 500 DEG C in temperature
Muffle furnace under heat treatment 1h, naturally cool to room temperature, obtain TiO2/ activated carbon composite granule；Described P25 type TiO2
Aqueous solution in P25 type TiO2Concentration be 1000mg/L；In described step one quality of the activated carbon that pretreatment is complete with
P25 type TiO2The volume ratio of aqueous solution be 1g:66.7mL；
Three, net load composite granule: be coated with last layer waterproof gel, the TiO then step 2 obtained on nylon wire2/ live
On property charcoal composite granule uniform fold waterproof gel on nylon wire, the TiO of covering2/ activated carbon composite granule thickness is
1.5mm, i.e. completes net and carries TiO2The preparation of the absorption of/activated carbon-photocatalysis water-purifying composite；Nylon wire described in composition
The diameter of section of nylon rope be 10mm.
Fig. 3 obtains TiO for test one step 22The SEM figure of/activated carbon composite granule, Fig. 4 obtains for test two step 2
TiO2The SEM figure of/activated carbon composite granule, as can be seen from the figure: (1) TiO2Successfully it is supported on activated carbon surface；(2)
Along with P25 type TiO2Aqueous solution in P25 type TiO2The rising of concentration, TiO2Load capacity is in rising trend.
Test three: obtain TiO by test one and test two step 2 respectively2/ activated carbon composite granule degradation of methylene blue, figure
5 is the process methylene blue degradation curve figure of test one, and direction of arrow representative processes the increase of time, and Fig. 6 is to process methylene
Base indigo plant degradation rate comparison diagram, curve 1 is test one, and curve 2 is test two, and figure as can be seen from Figure, tests a step
Two obtain TiO2The degradation efficiency of/activated carbon composite granule is the highest, i.e. activated carbon is immersed in the TiO of 500mg/L2Institute in solution
The composite granule obtained has the most efficient photocatalysis performance.When impregnation concentrations is excessive, TiO2Mesopore on activated carbon can be caused
Blocking, thus cut down absorbability, caused degradation rate to decline.
Test four: test on the spot at Harbin Ma Jiagou (heavily contaminated river, Harbin City).Take an airtight water tank, add
Enter Majiagou River water, the net of test one preparation is carried TiO2Water tank put into by the absorption of/activated carbon-photocatalysis water-purifying composite
In, the most again sample in water tank and water sample absorbance after measurement processing after 0h, 3h, 6h, 12h.
By measuring the concentration of the organic pollution of two groups of water samples, calculate organic pollutant degradation rate:
η=(C1-C2)/C1 (4-1)
Wherein, η is degradation rate；C1 is Organic Pollution substrate concentration before processing；C2 is organic contamination substrate concentration after processing.
It is proportional to solution concentration, i.e. again because of the absorbance measured by spectrophotometer
η=(A1-A2)/A1 (4-2)
Known A1=0.012, A2=0.001；Above-mentioned data are brought in (4-2), obtains degradation rate η=91.67%.
Sum up and analyze
After net materials catalytic degradation under 12h nature light, the stink of sewage disappears substantially.The composite granule degraded to sewage
It is quick and efficient, degradation rate η >=90% of organic pollution, and use can be reclaimed, it is expected to promote.
The advantage of test one and two:
(1) activated carbon utilizing titanium dioxide and high adsorption prepares composite granule, reaches synergistic sorption-light-catalysed effect,
Solve territory, lake organic pollution low concentration not problem of easy degradation；
(2) load TiO2/ activated carbon composite granule is online in erosion-resisting flexible nylon so that composite granule immobilization and energy
Enough recycle, solve powder body problem of not easily collecting in aqueous environment, reduce the cost that pollution processes simultaneously.
Claims (5)
1. a net carries TiO2The preparation method of the absorption of/activated carbon-photocatalysis water-purifying composite, it is characterised in that net carries
TiO2The preparation method of the absorption of/activated carbon-photocatalysis water-purifying composite is carried out according to the following steps:
One, Activated Carbon Pretreatment: be the HNO of 17% by granular active carbon and volume fraction3Aqueous solution uniformly mixes, then
With magnetic stirring apparatus heated and stirred 1h～3h under conditions of temperature is 100 DEG C, then by distilled water filtering and washing 6 times～7 times,
In the air drier that temperature is 80 DEG C, it is dried 2h, obtains the activated carbon that pretreatment is complete；The quality of described granular active carbon
It is the HNO of 17% with volume fraction3The volume ratio of aqueous solution is 1g:(35mL～45mL)；
Two, TiO2Prepared by/activated carbon composite granule: activated carbon complete for pretreatment in step one is added P25 type TiO2Water-soluble
In liquid, it is put in ultrasonic washing instrument and vibrates to no longer having bubble to emerge from activated carbon granule, the most in the dark stir
1h, filters, is then placed in electrically heated drying cabinet, dries 2h, be 500 DEG C in temperature under conditions of temperature is 110 DEG C
Heat treatment 1h under Muffle furnace, naturally cools to room temperature, obtains TiO2/ activated carbon composite granule；Described P25 type TiO2's
P25 type TiO in aqueous solution2Concentration more than or equal to 500mg/L and less than or equal to 1000mg/L；In described step one in advance
The quality of the activated carbon processed and P25 type TiO2The volume ratio of aqueous solution be 1g:(60mL～70mL)；
Three, net load composite granule: be coated with last layer waterproof gel, the TiO then step 2 obtained on nylon wire2/ activity
On charcoal composite granule uniform fold waterproof gel on nylon wire, the TiO of covering2/ activated carbon composite granule thickness is
1mm～2mm, i.e. completes net and carries TiO2The preparation of the absorption of/activated carbon-photocatalysis water-purifying composite；Nylon described in composition
The diameter of section of the nylon rope of net is 2mm～20mm.
A kind of net the most according to claim 1 carries TiO2The preparation side of the absorption of/activated carbon-photocatalysis water-purifying composite
Method, it is characterised in that the quality of the granular active carbon described in step one and volume fraction are the HNO of 17%3The body of aqueous solution
Long-pending ratio is 1g:41.7mL.
A kind of net the most according to claim 1 carries TiO2The preparation side of the absorption of/activated carbon-photocatalysis water-purifying composite
Method, it is characterised in that P25 type TiO described in step 22Aqueous solution in P25 type TiO2Concentration be 500mg/L.
A kind of net the most according to claim 1 carries TiO2The preparation side of the absorption of/activated carbon-photocatalysis water-purifying composite
Method, it is characterised in that the quality of the activated carbon that pretreatment is complete and P25 type TiO in the step one described in step 22Aqueous solution
Volume ratio be 1g:66.7mL.
A kind of net the most according to claim 1 carries TiO2The preparation side of the absorption of/activated carbon-photocatalysis water-purifying composite
Method, it is characterised in that the diameter of section of the nylon rope forming described nylon wire in step 3 is 10mm.
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| CN111617740A (en) * | 2020-05-25 | 2020-09-04 | 齐鲁工业大学 | Layered carbon/titanium dioxide composite material and preparation method and application thereof |
| CN113354104A (en) * | 2021-07-01 | 2021-09-07 | 云南华谱量子材料有限公司 | Ecological system suitable for deepwater environment restoration and construction method thereof |
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