CN105964235A - Preparation method of porous titanium dioxide-silica block - Google Patents
Preparation method of porous titanium dioxide-silica block Download PDFInfo
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- CN105964235A CN105964235A CN201610293407.7A CN201610293407A CN105964235A CN 105964235 A CN105964235 A CN 105964235A CN 201610293407 A CN201610293407 A CN 201610293407A CN 105964235 A CN105964235 A CN 105964235A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000010936 titanium Substances 0.000 title claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract description 14
- 239000000377 silicon dioxide Substances 0.000 title abstract description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title abstract description 6
- 229910052719 titanium Inorganic materials 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001879 gelation Methods 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 33
- TVUBDAUPRIFHFN-UHFFFAOYSA-N dioxosilane;oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4].O=[Si]=O TVUBDAUPRIFHFN-UHFFFAOYSA-N 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 229920001223 polyethylene glycol Polymers 0.000 claims description 7
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000011975 tartaric acid Substances 0.000 claims description 3
- 235000002906 tartaric acid Nutrition 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims 2
- 150000001412 amines Chemical class 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract description 2
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- 239000011259 mixed solution Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical group 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 2
- SZUKQRSUJLZCFE-UHFFFAOYSA-N [Ti].O=[Si]=O Chemical compound [Ti].O=[Si]=O SZUKQRSUJLZCFE-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- JLFNLZLINWHATN-UHFFFAOYSA-N pentaethylene glycol Chemical compound OCCOCCOCCOCCOCCO JLFNLZLINWHATN-UHFFFAOYSA-N 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 229940093429 polyethylene glycol 6000 Drugs 0.000 description 2
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- TZBAVQKIEKDGFH-UHFFFAOYSA-N n-[2-(diethylamino)ethyl]-1-benzothiophene-2-carboxamide;hydrochloride Chemical compound [Cl-].C1=CC=C2SC(C(=O)NCC[NH+](CC)CC)=CC2=C1 TZBAVQKIEKDGFH-UHFFFAOYSA-N 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 229940057838 polyethylene glycol 4000 Drugs 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- -1 silicon ion Chemical class 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/651—50-500 nm
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/653—500-1000 nm
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Silicon Compounds (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a preparation method of a porous titanium dioxide-silica block. The preparation method comprises respectively adding butyl titanate and ethyl orthosilicate as raw materials into a specific dispersant-containing anhydrous ethanol-deionized water mixed solution, carrying out a water bath reaction process on the butyl titanate solution to obtain butyl titanate semigel, adding the ethyl orthosilicate solution into the semigel, carrying out a stirring reaction process until gelation, directly molding the dried powder and carrying out sintering to obtain the porous titanium dioxide-silica block. The preparation method has the characteristics of simple device, short period and low cost.
Description
Technical field
The invention belongs to field of material technology, particularly to a kind of poriferous titanium dioxide-silicon dioxide bulk
Preparation method.
Background technology
Nano titanium oxide-silicon dioxide composite material is a kind of efficient photocatalyst, air cleaning,
The fields such as organic degraded have a wide range of applications.Affect nano titanium oxide-silicon dioxide multiple
The principal element of the photocatalysis performance closing powder body material includes morphology microstructure, particle diameter, crystalline phase composition and dispersion
Degree, the reduction of titania-silica composite powder material particle diameter, its surface activity is the biggest, light
Catalysis activity is the biggest.But, the increase of specific surface area easily causes titania-silica composite Nano
The agglomeration of powder body, the photocatalysis effect of titania-silica composite granule is also restrained.
Synthesizing porous titania-silica bulk, sufficiently fine perforate composition can keep nano titanium oxide
The efficient catalytic of-silicon dioxide composite material, this method efficiently solves composite nano-powder material
Agglomeration traits.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of porous silica
The preparation method of titanium-silicon dioxide bulk, has that production technology is simple, equipment requirements is simple, the cycle is short
Feature.
To achieve these goals, the technical solution used in the present invention is:
The preparation method of a kind of poriferous titanium dioxide-silicon dioxide bulk, comprises the steps:
(1) in the mixed liquor of the dehydrated alcohol that volume ratio is 1:2～3 and deionized water, dispersion is added
Agent stirring and dissolving forms solution A；
(2) take the solution A of 1/5, tetraethyl orthosilicate is dissolved in wherein formation solution B standby；By metatitanic acid
Butyl ester is dissolved in surplus solution A formation solution C, obtains to 5～7 with the pH value of ammonia regulation solution C
Colloidal sol C；
(3) by colloidal sol C water-bath 20～30min at 80～85 DEG C, lower solution B is added being stirred continuously
Enter wherein, continue in this water bath condition down to gelation, then at 140～160 DEG C, be dried formation xerogel,
Naturally carry out ground sieve after drying under room temperature and obtain xerogel powder body；
(4) dry powder after sieving is the most dry-pressing formed, forms block blank of material, finally by bulk base
Body material carries out being thermally treated resulting in poriferous titanium dioxide-silicon dioxide bulk.
In described step (1), described dispersant is by ethylenediaminetetraacetic acid, citric acid, diethylenetriamine five
Carboxylic acid, tartaric acid, ethylene glycol and Polyethylene Glycol composition, in solution A, the concentration model of dispersant each component
Enclose and be 0～0.5mol/L.
In described step (2), the mol ratio of Si Yu Ti is 1:(4～8), and Si ion and Ti
Ion sum is 1:(0.5～1 with the mol ratio of citric acid).
In described step (4), described heat treatment is to carry out burying burning in ZnO powder body, and temperature is
700～900 DEG C.
Compared with prior art, the invention has the beneficial effects as follows: the poriferous titanium dioxide that the present invention provides-
In the preparation method of silicon dioxide bulk, with ethylenediaminetetraacetic acid, citric acid, diethylenetriamine pentacarboxylic acid,
Tartaric acid, ethylene glycol, Polyethylene Glycol (such as PEG400, Macrogol 4000, polyethylene glycol 6000)
Deng directly carrying out the gelation process of complexation foaming as dispersant, by controlling the concentration of each material, special
Not being the consumption of each dispersant, the middle powder body material formed after drying can become bulk material by straight forming,
In this preparation method, titanium ion and silicon ion is not made to be uniformly present in system merely with dispersant,
Make the crystallization of poriferous titanium dioxide-silicon dioxide bulk and recombination process more uniform, and reduce pelletize,
Old process, makes crystallization process complete with sintering one step, and this all makes manufacturing cycle shorten, and cost reduces.
In conjunction with burying the heat treatment process of burning, organic foaming and decomposition combustion process is utilized to form porous silica
Titanium-silicon dioxide bulk, can obtain the poriferous titanium dioxide-silicon dioxide bulk of perforate.
Detailed description of the invention
Embodiments of the present invention are described in detail below in conjunction with embodiment.
Embodiment 1
The preparation method of a kind of poriferous titanium dioxide-silicon dioxide bulk, comprises the steps:
(1) mixed liquor (V of 50mL dehydrated alcohol and deionized water is measuredDehydrated alcohol: VDeionized water=1:2),
Weigh a certain amount of dispersant (by ethylenediaminetetraacetic acid, citric acid, diethylenetriamine pentacarboxylic acid, winestone
Acid, ethylene glycol, Polyethylene Glycol composition, wherein Polyethylene Glycol includes again PEG400, Polyethylene Glycol
4000 and polyethylene glycol 6000) be added thereto, stirring and dissolving forms solution A, dispersant each component dense
Degree controls at 0.5mol/L.
(2) measure the solution A of 1/5, tetraethyl orthosilicate is dissolved in wherein formation solution B standby；By titanium
Acid butyl ester is dissolved in surplus solution A formation solution C, wherein, Si:Ti (mol ratio)=1:4, ion:
Citric acid (mol ratio)=1:0.5.With ammonia (volumetric concentration 25～28%) regulation pH value to 5～
7 i.e. obtain colloidal sol C.
(3) by colloidal sol C water-bath 20～30min at 85 DEG C, lower by solution B addition being stirred continuously
Wherein, continue in this water bath condition down to gelation.It is dried at 140 DEG C again and forms xerogel, room temperature
Lower naturally dry after be ground sieving by powder body.
(4) the direct dry pressing of dry powder after sieving forms block blank of material, finally by bulk base substrate
Material carries out burying burning in ZnO powder body, i.e. obtains poriferous titanium dioxide-silicon dioxide block materials, heat
Treatment temperature is 900 DEG C.Gained poriferous titanium dioxide-silicon dioxide bulk is open-celled structure, crystal grain chi
Very little about 50nm～400nm, gap size is 50nm～200nm.
Embodiment 2
The preparation method of a kind of poriferous titanium dioxide-silicon dioxide bulk, comprises the steps:
(1) mixed liquor (V of 50mL dehydrated alcohol and deionized water is measuredDehydrated alcohol: VDeionized water=1:3),
Weigh a certain amount of dispersant (by ethylenediaminetetraacetic acid, citric acid, diethylenetriamine pentacarboxylic acid, winestone
Acid, ethylene glycol, Polyethylene Glycol composition) it is added thereto, stirring and dissolving forms solution A, each group of dispersant
The concentration of part controls at 0.5mol/L.
(2) measure the solution A of 1/5, tetraethyl orthosilicate is dissolved in wherein formation solution B standby；By titanium
Acid butyl ester is dissolved in surplus solution A formation solution C, wherein, Si:Ti (mol ratio)=1:8, ion:
Citric acid (mol ratio)=1:1.With ammonia (volumetric concentration 25～28%) regulation pH value to 5～7
I.e. obtain colloidal sol C.
(3) by colloidal sol C water-bath 20～30min at 80 DEG C, lower solution B is added it being stirred continuously
In, continue in this water bath condition down to gelation.It is dried at 160 DEG C again and forms xerogel, under room temperature
Naturally it is ground sieving by powder body after drying.
(4) the direct dry pressing of dry powder after sieving, forms block blank of material, finally by bulk base
Body material carries out burying burning in ZnO powder body and i.e. obtains poriferous titanium dioxide-silicon dioxide block materials, heat
Treatment temperature is 700 DEG C.Gained poriferous titanium dioxide-silicon dioxide bulk is open-celled structure, crystal grain chi
Very little about 50nm～400nm, gap size is 50nm～200nm.
Embodiment 3
The preparation method of a kind of poriferous titanium dioxide-silicon dioxide bulk, comprises the steps:
(1) mixed liquor (V of 50mL dehydrated alcohol and deionized water is measuredDehydrated alcohol: VDeionized water=1:2),
Weigh a certain amount of dispersant (by ethylenediaminetetraacetic acid, citric acid, diethylenetriamine pentacarboxylic acid, winestone
Acid, ethylene glycol, Polyethylene Glycol composition) it is added thereto, stirring and dissolving forms solution A, each group of dispersant
Part concentration control 0.01,0.12,0.11,0.15,0.33,0.5mol/L.
(2) measure the solution A of 1/5, tetraethyl orthosilicate is dissolved in wherein formation solution B standby；By titanium
Acid butyl ester is dissolved in surplus solution A formation solution C, wherein, Si:Ti (mol ratio)=1:6, ion:
Citric acid (mol ratio)=1:0.6.With ammonia (volumetric concentration 25～28%) regulation pH value to 5～
7 i.e. obtain colloidal sol C.
(3) by colloidal sol C water-bath 20～30min at 85 DEG C, lower by solution B addition being stirred continuously
Wherein, continue in this water bath condition down to gelation.It is dried at 150 DEG C again and forms xerogel, room temperature
Lower naturally dry after be ground sieving by powder body.
(4) the direct dry pressing of dry powder after sieving, forms block blank of material, finally by bulk base
Body material carries out burying burning in ZnO powder body and i.e. obtains poriferous titanium dioxide-silicon dioxide block materials, heat
Treatment temperature is 800 DEG C.Gained poriferous titanium dioxide-silicon dioxide bulk is open-celled structure, crystal grain chi
Very little about 50nm～400nm, gap size is 50nm～200nm.
Claims (5)
1. the preparation method of poriferous titanium dioxide-silicon dioxide bulk, it is characterised in that include as
Lower step:
(1) in the mixed liquor of the dehydrated alcohol that volume ratio is 1:2～3 and deionized water, dispersion is added
Agent stirring and dissolving forms solution A；
(2) take the solution A of 1/5, tetraethyl orthosilicate is dissolved in wherein formation solution B standby；By metatitanic acid
Butyl ester is dissolved in surplus solution A formation solution C, obtains to 5～7 with the pH value of ammonia regulation solution C
Colloidal sol C；
(3) by colloidal sol C water-bath 20～30min at 80～85 DEG C, lower solution B is added being stirred continuously
Enter wherein, continue in this water bath condition down to gelation, then at 140～160 DEG C, be dried formation xerogel,
Naturally carry out ground sieve after drying under room temperature and obtain xerogel powder body；
(4) dry powder after sieving is the most dry-pressing formed, forms block blank of material, finally by bulk base
Body material carries out being thermally treated resulting in poriferous titanium dioxide-silicon dioxide bulk.
The most according to claim 1, the preparation method of poriferous titanium dioxide-silicon dioxide bulk, it is special
Levying and be, in described step (1), described dispersant is by ethylenediaminetetraacetic acid, citric acid, divinyl three
Amine pentacarboxylic acid, tartaric acid, ethylene glycol and Polyethylene Glycol composition.
The most according to claim 2, the preparation method of poriferous titanium dioxide-silicon dioxide bulk, it is special
Levying and be, in described solution A, the concentration range of dispersant each component is 0～0.5mol/L.
The most according to claim 2, the preparation method of poriferous titanium dioxide-silicon dioxide bulk, it is special
Levying and be, in described step (2), the mol ratio of Si Yu Ti is 1:(4～8), and Si ion with
Ti ion sum is 1:(0.5～1 with the mol ratio of citric acid).
The most according to claim 2, the preparation method of poriferous titanium dioxide-silicon dioxide bulk, it is special
Levying and be, in described step (4), described heat treatment is to carry out burying burning in ZnO powder body, and temperature is
700～900 DEG C.
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