CN102976402A - TiO2 xerogel for reversible adsorption of azo dye under light control and preparation method and application of TiO2 xerogel - Google Patents
TiO2 xerogel for reversible adsorption of azo dye under light control and preparation method and application of TiO2 xerogel Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 230000002441 reversible effect Effects 0.000 title claims abstract description 22
- 238000001179 sorption measurement Methods 0.000 title abstract description 7
- 239000000987 azo dye Substances 0.000 title abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title abstract 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000975 dye Substances 0.000 claims abstract description 35
- 238000003795 desorption Methods 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 13
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000005286 illumination Methods 0.000 claims description 23
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- TZMFJUDUGYTVRY-UHFFFAOYSA-N pentane-2,3-dione Chemical compound CCC(=O)C(C)=O TZMFJUDUGYTVRY-UHFFFAOYSA-N 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 238000002336 sorption--desorption measurement Methods 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 230000029087 digestion Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000003980 solgel method Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 abstract 2
- 238000004043 dyeing Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 28
- 239000000243 solution Substances 0.000 description 20
- 229910010413 TiO 2 Inorganic materials 0.000 description 15
- CQPFMGBJSMSXLP-ZAGWXBKKSA-M Acid orange 7 Chemical compound OC1=C(C2=CC=CC=C2C=C1)/N=N/C1=CC=C(C=C1)S(=O)(=O)[O-].[Na+] CQPFMGBJSMSXLP-ZAGWXBKKSA-M 0.000 description 10
- 239000000499 gel Substances 0.000 description 10
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 235000011194 food seasoning agent Nutrition 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 230000008313 sensitization Effects 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- -1 azobenzene compound Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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- 230000005281 excited state Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 208000017983 photosensitivity disease Diseases 0.000 description 1
- 231100000434 photosensitization Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical group O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses a TiO2 xerogel for reversible adsorption of azo dye and a preparation method and application of the TiO2 xerogel, belonging to the field of absorption materials. The TiO2 xerogel for reversible adsorption of azo dye is prepared from tetrabutyl titanate, acetylacetone, alcohol, nitric acid and water as raw materials by adopting a sol-gel method through regulating the proportion of different raw materials and the formation condition of the gel. The preparation method has the advantages of simple steps, easy availability of the raw materials, and environmental friendliness of a preparation process. Proved by experiments, the prepared TiO2 xerogel can realize circulation of absorption-desorption, when the TiO2 xeroge is applied to a sensor, signal transformation can be realized by using the light-sensitive characteristic of the TiO2 xeroge, and when the TiO2 xeroge is applied to the field of water treatment, decoloring of printing and dyeing wastewater and recycling of dyes can be realized.
Description
Technical field
The present invention relates to a kind of preparation method and purposes of light-operated sorbing material, relate in particular a kind of TiO of light-operated reversible adsorption desorption azoic dyestuff
2Xerogel and its preparation method and application.
Background technology
Absorption is an important interface process, can be used for the recycling of gas delivery, water purification and resource etc.Absorption also be light-catalyzed reaction must through and first step.TiO
2Photocatalyst is because of good stability, the catalytic efficiency advantages of higher, and its preparation and applied research have become the study hotspot of catalytic field.Present restricted T iO
2The Main Bottleneck of photocatalytic applications is the utilization ratio of sun power low.Dye molecule is adsorbed on TiO
2The utilization ratio of the energy can be improved by the photosensitization of dye molecule in the surface.In the solar cell of dye sensitization, dye molecule is at metal oxide (TiO
2, SnO
2Deng) electrode surface absorption, after the illumination by ground state transition to excited state, transfer transport is to semi-conductive conduction band.In this process, the active adsorption of dye molecule is the key that improves photoelectric transformation efficiency.Because the electrode of dye-sensitized cell is soaked in the electrolyte solution, the dye molecule of electrode surface is in the dynamic adsorption and desorption process.Dyestuff behind the desorption will lose the sensibilized to metal oxide.Therefore, desorption is a unfavorable factor in the solar cell of dye sensitization.In contrast, the product that catalysis generates in the selective photocatalysis oxidising process is slower at the desorption of catalyst surface, and product might become the limiting factor of catalyzed reaction in the accumulation of catalyst surface.Therefore, effectively controlling the adsorption-desorption process is the efficient key of utilizing this surface phenomenon of absorption.
Absorption spontaneous process of carrying out normally need to by various chemistry or physical means, mainly contain solvent elution, temperature, pH value, light, magnetic field and electric field etc. usually to the regulation and control of adsorption-desorption process.Wherein, illumination has been avoided the problem of some other method energy consumption height or secondary pollution, thereby has been received much concern because utilizing inexhaustible solar energy resources.Number of patent application has been disclosing of CN200910242242.0 utilizes illumination to control the method for carbon nanotube solubleness, mainly be to dissociate under the illumination of certain wavelength by the inclusion type supramolecular complex that azobenzene compound and cyclodextrin form, realize increasing the solubleness of carbon nanotube in water.People had observed the phenomenon at the photoadsorption of metal oxide surface or desorption micro-molecular gas already, but these processes are usually irreversible and because adsorptive capacity is low, material is not enough to use as sorbent material.Therefore, develop the material with light-operated reversible adsorption desorption dyestuff ability and become an above Application Areas difficult problem in the urgent need to address.
Summary of the invention
1, invents the technical problem that will solve
In the energy consumption height that exists aspect the desorption, the problem of secondary pollution, the invention provides a kind of TiO of light-operated reversible absorption azoic dyestuff for existing sorbing material
2Xerogel and its preparation method and application is rationally regulated the proportioning of different material and the formation condition side of gel and is prepared TiO
2Xerogel can UV-light be reversible adsorption and the desorption that unique energy is realized azo dyes.
2, technical scheme
The principle of the invention: adopt sol-gel method, prepare TiO by the proportioning of adjusting different material and the formation condition of gel
2Xerogel, purpose are TiO
2The reversing process of xerogel adsorption-desorption azoic dyestuff can be controlled by illumination.
Its technical scheme is as follows:
A kind of TiO of light-operated reversible absorption azoic dyestuff
2The preparation method of xerogel:
(1) methyl ethyl diketone, tetrabutyl titanate and ethanol are at room temperature stirred with ratio in sequence, mix, wherein the volume ratio of tetrabutyl titanate and methyl ethyl diketone is 10:0.75-3;
(2) a certain amount of deionized water, acetic acid or nitric acid and ethanol are mixed, slowly splash into step (1) gained solution, stir after 30 minutes under the room temperature and obtain even colloidal sol, wherein raw materials used volume ratio tetrabutyl titanate: ethanol: water: nitric acid or acetic acid are 10: 20-40: 1-3: 0.25-0.75;
(3) colloidal sol places under the natural condition and is aged to gel, is dried to constant weight, obtains the TiO of light-operated reversible absorption azoic dyestuff
2Xerogel.
The amount of adding nitric acid or acetic acid in the step (2) makes the pH value of gained colloidal sol between 2-5.Middle digestion time 1-7 days of step (3), the vacuum-drying temperature is 40-80 ℃.
The light-operated reversible that adopts aforesaid method to prepare adsorbs the TiO of azoic dyestuff
2Xerogel is faint yellow particle (Fig. 1) under the room temperature, has certain hydrophobicity (Fig. 2).Active adsorption azoic dyestuff under the low power UV illumination condition, remove illumination after, the reversible desorption of azoic dyestuff, and repeatedly illumination can realize circulation absorption-desorption (Fig. 3).
3, beneficial effect
With respect to prior art, the present invention has following beneficial effect:
(1) TiO of light-operated reversible absorption azoic dyestuff of the present invention
2Preparation method's step of xerogel is simple, and raw material is easy to get, the preparation process environmental friendliness;
(2) TiO of light-operated reversible absorption azoic dyestuff of the present invention
2Xerogel can utilize inexhaustible solar radiation, and the reversible adsorption desorption of dyestuff is based upon on the basis that has or not illumination, adsorb under the illumination condition, lucifuge is desorption then, is easy to achieve effective control, has overcome the shortcomings such as the conventional physical loading capacity is low, desorption is difficult, recovery is difficult.
(3) xerogel of the present invention's preparation can be realized circulation absorption-desorption through experimental verification, in the application of sensor, can utilize its " light sensitive characteristic " to realize conversion of signals.
The present invention has wide practical use in fields such as water pollution control and resource utilization, sun power conversion and molecular switches.
Description of drawings
Fig. 1 is TiO
2Xerogel prepares the resulting material of each step: the variation diagram of colloidal sol, gel, xerogel;
Fig. 2 is TiO
2The enlarged photograph of the quiet contact angle that drips of xerogel (surface is water droplet);
Fig. 3 is TiO
2The variation synoptic diagram of xerogel-azoic dyestuff solution system illumination absorption and placement desorption process.
Embodiment
By the following examples the present invention is described in further detail.
Embodiment 1:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 10 mL butyl (tetra) titanates is splashed in the mixed solution of ethanol (10 mL) and methyl ethyl diketone (0.75 mL), stirred 10 minutes under the normal temperature, be A liquid;
(2) getting 0.6 mL mass percent is the nitric acid of 65%-68%, fully mixes with 20 mL ethanol with after 3 times of the deionized water dilutions, is B liquid;
(3) B liquid is slowly splashed in the A liquid, lasting stirring obtains stable colloidal sol;
(4) colloidal sol is at room temperature aging 7 days, and 80 ℃ of vacuum-dryings are to constant weight, i.e. xerogel.
Getting 0.05 g xerogel is in acid orange 7 (AO7) solution of 70 mg/L in 100 mL concentration, at low power ultraviolet lamp (power 20 W, light intensity 0.3 mW/cm
2, wavelength 254 nm) and descend illumination 3 hours, AO7 solution decolours fully; Remove illumination after 12 hours, solution colour partly recovers, and after 24 hours, AO7 solution returns to the starting point concentration before the illumination, reaches complete desorption, nearly 140 mg/g of desorption rate.
Embodiment 2:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 0.75 mL methyl ethyl diketone is splashed in the 10 mL butyl (tetra) titanates, stirred 10 minutes under the room temperature, be A liquid;
(2) in A liquid, add 20 mL ethanol, continue to stir, be B liquid;
(3) measuring deionized water 3 mL, massfraction is that 35% nitric acid 0.5 mL, ethanol 10 mL mix, and slowly splashes in the B liquid, stirs after 30 minutes under the room temperature and obtains homogeneous colloidal sol;
(4) colloidal sol places under the natural condition and wears out, 4 hours inner gels, and seasoning is to constant weight under the room temperature.
Getting 0.01 g xerogel is in the AO7 solution of 40 mg/L in 25 mL concentration, at low power ultraviolet lamp (power 36 W, light intensity 0.03 mW/cm
2, wavelength 254 nm) and descend illumination 2 hours, solution is colourless, and dye decolored rate reaches 100%.Place under the dark situation after 24 hours, it is orange red that solution recovers, and desorption rate is near 50 mg/g.
Embodiment 3:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 0.75 mL methyl ethyl diketone is splashed in the 10 mL butyl (tetra) titanates, stirred 10 minutes under the room temperature, be A liquid;
(2) in A liquid, add 10 mL ethanol, continue to stir, be B liquid;
(3) measure deionized water 3 mL, acetic acid 0.75 mL, ethanol 10 mL mix, and slowly splash in the B liquid, stir under the room temperature after 30 minutes and obtain homogeneous colloidal sol;
(4) colloidal sol places under the natural condition and is aged to gel, and seasoning is to constant weight under the room temperature.
Getting the 0.01g xerogel is in the AO7 solution of 40 mg/L in 25 mL concentration, at low power ultraviolet lamp (power 36 W, light intensity 0.03 mW/cm
2, wavelength 254 nm) and descend illumination 2 hours, solution is colourless, and the dyestuff desorption rate reaches 37 mg/g after 24 hours.
Embodiment 4:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 1.5 mL methyl ethyl diketones is splashed in the 10 mL butyl (tetra) titanates, stirred 10 minutes under the room temperature, be A liquid;
(2) in A liquid, add 20 mL ethanol, continue to stir, be B liquid;
(3) measuring deionized water 3 mL, massfraction is that 35% nitric acid 0.5 mL, ethanol 10 mL mix, and slowly splashes in the B liquid, stirs after 30 minutes under the room temperature and obtains homogeneous colloidal sol;
(4) colloidal sol places under the natural condition and wears out, 24 hours inner gels, and 80 ℃ of vacuum-dryings are to constant weight.
Be faint yellow particle under the xerogel room temperature that is prepared by present embodiment, its content is: C 9.05 % by weight; , H 3.56 % by weight, O 52.77 % by weight, N 1.24 % by weight, Ti 33.38 % by weight.
Getting 0.01 g xerogel is in the AO7 solution of 80 mg/L in 40 mL concentration, at low power ultraviolet lamp (power 36 W, light intensity 0.03 mW/cm
2, wavelength 365 nm) and descend illumination 2 hours, solution is substantially colourless, and treatment capacity is 250 mg/g.Place after 24 hours solution under the dark situation and return to orange redly, desorption rate accounts for 20% of total treatment capacity; Illumination is 2 hours again, and solution is again colourless, returns to orange redly after 24 hours, and desorption rate is near 100%; Lighting effect is with for the second time basic identical for the third time.
Embodiment 5:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 2.25 mL methyl ethyl diketones is splashed in the 10 mL butyl (tetra) titanates, stirred 10 minutes under the room temperature, be A liquid;
(2) in A liquid, add 20 mL ethanol, continue to stir, be B liquid;
(3) measuring deionized water 3 mL, massfraction is 35% nitric acid 0.5 mL, ethanol 10 mL, mixes, and slowly splashes in the B liquid, stirs after 30 minutes under the room temperature and obtains homogeneous colloidal sol;
(4) colloidal sol places under the natural condition and is aged to gel, and seasoning is to constant weight under the room temperature.
Getting 0.01 g xerogel is in the AO7 solution of 80 mg/L in 40 mL concentration, at low power ultraviolet lamp (power 15 W, light intensity 60 W/cm
2, wavelength 365 nm) and descend illumination 2 hours, solution is colourless, and the xerogel treatment capacity is 170 mg/g.Place under the dark situation after 24 hours, desorption rate was still increasing after the dyestuff desorption rate accounted for 14%, 48 hour of total treatment capacity.
Embodiment 6:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 3 mL methyl ethyl diketones is splashed in the 10 mL butyl (tetra) titanates, stirred 10 minutes under the room temperature, be A liquid;
(2) in A liquid, add 20 mL ethanol, continue to stir, be B liquid;
(3) measuring deionized water 3 mL, massfraction is that 35% nitric acid 0.25 mL, ethanol 20 mL mix, and slowly splashes in the B liquid, stirs after 30 minutes under the room temperature and obtains homogeneous colloidal sol;
(4) colloidal sol places under the natural condition and is aged to gel, and seasoning is to constant weight under the room temperature.
Getting 0.01 g xerogel is in the AO7 solution of 80 mg/L in 40 mL concentration, at low power ultraviolet lamp (power 36 W, light intensity 0.03 mW/cm
2, wavelength 365 nm) and descend illumination 2 hours, place under the dark situation, desorption rate can reach 70 mg/g after 48 hours.
Embodiment 7:
Present embodiment TiO
2The xerogel preparation is carried out according to the following steps:
(1) 1.5 mL methyl ethyl diketones is splashed in the 10 mL butyl (tetra) titanates, stirred 10 minutes under the room temperature, be A liquid;
(2) in A liquid, add 20 mL ethanol, continue to stir, be B liquid;
(3) measuring deionized water 1 mL, massfraction is that 35% nitric acid 0.5 mL, ethanol 10 mL mix, and slowly splashes in the B liquid, stirs after 30 minutes under the room temperature and obtains homogeneous colloidal sol;
(4) colloidal sol places under the natural condition and is aged to gel, and seasoning is to constant weight under the room temperature.
Getting 0.01 g xerogel is in the AO7 solution of 80 mg/L in 40 mL concentration, at low power ultraviolet lamp (power 36 W, light intensity 0.03 mW/cm
2, wavelength 365 nm) and descend illumination 2 hours, solution is substantially colourless, and the xerogel treatment capacity reaches 306 mg/g.Place after 24 hours under the dark situation, the dyestuff desorption rate is 60 mg/g.
Claims (6)
1. the TiO of light-operated reversible absorption azoic dyestuff
2The preparation method of xerogel the steps include:
(1) a certain amount of methyl ethyl diketone, tetrabutyl titanate and ethanol are at room temperature stirred, mix, wherein the volume ratio of tetrabutyl titanate and methyl ethyl diketone is 10:0.75-3;
(2) a certain amount of deionized water, acetic acid or nitric acid and ethanol are mixed, slowly splash into step (1) gained solution, stir after 30 minutes under the room temperature and obtain even colloidal sol, wherein raw materials used volume tetrabutyl titanate: ethanol: water: nitric acid or acetic acid are 10: 20-40: 1-3: 0.25-0.75;
(3) colloidal sol places under the natural condition and is aged to gel, is dried to constant weight, obtains the TiO of light-operated reversible absorption azoic dyestuff
2Xerogel.
2. light-operated reversible according to claim 1 adsorbs the TiO of azoic dyestuff
2The preparation method of xerogel is characterized in that the amount of adding nitric acid or acetic acid in the step (2) makes the pH value of gained colloidal sol between 2-5.
3. light-operated reversible according to claim 1 adsorbs the TiO of azoic dyestuff
2The preparation method of xerogel is characterized in that digestion time is 1-7 days in the step (3), and the vacuum-drying temperature is 40-80 ℃.
4. the TiO of the light-operated reversible absorption azoic dyestuff for preparing of method claimed in claim 1
2Xerogel.
5. the TiO of the light-operated reversible absorption azoic dyestuff for preparing of method claimed in claim 1
2Xerogel is in the application of adsorbing domain.
6. application according to claim 5 is characterized in that illumination 1-3 hour adsorbable azoic dyestuff under the low power ultraviolet lamp 15W-40W, remove illumination after, the dyestuff desorption, the adsorption-desorption process is reversible.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2600767C1 (en) * | 2015-07-27 | 2016-10-27 | Государственное образовательное учреждение высшего профессионального образования "Челябинский государственный педагогический университет" | Method of producing titanium dioxide |
| WO2016192144A1 (en) * | 2015-06-05 | 2016-12-08 | 南京大学 | Tio2-base coagulant and application thereof |
| CN108928850A (en) * | 2018-07-31 | 2018-12-04 | 中冶华天工程技术有限公司 | The preparation method of visible light-responded mesoporous titanium dioxide material |
| CN111115783A (en) * | 2020-01-11 | 2020-05-08 | 南京大学 | Method for preparing poly-titanium coagulant and application thereof |
| CN111151225A (en) * | 2020-01-09 | 2020-05-15 | 南京大学 | Titanium oxide cluster gel adsorbent and application thereof |
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| WO2016192144A1 (en) * | 2015-06-05 | 2016-12-08 | 南京大学 | Tio2-base coagulant and application thereof |
| RU2600767C1 (en) * | 2015-07-27 | 2016-10-27 | Государственное образовательное учреждение высшего профессионального образования "Челябинский государственный педагогический университет" | Method of producing titanium dioxide |
| CN108928850A (en) * | 2018-07-31 | 2018-12-04 | 中冶华天工程技术有限公司 | The preparation method of visible light-responded mesoporous titanium dioxide material |
| CN111151225A (en) * | 2020-01-09 | 2020-05-15 | 南京大学 | Titanium oxide cluster gel adsorbent and application thereof |
| CN111115783A (en) * | 2020-01-11 | 2020-05-08 | 南京大学 | Method for preparing poly-titanium coagulant and application thereof |
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