CN106345471B - A kind of optically catalytic TiO 2 composite for purifying vehicle exhaust and preparation method thereof - Google Patents
A kind of optically catalytic TiO 2 composite for purifying vehicle exhaust and preparation method thereof Download PDFInfo
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- CN106345471B CN106345471B CN201610632487.4A CN201610632487A CN106345471B CN 106345471 B CN106345471 B CN 106345471B CN 201610632487 A CN201610632487 A CN 201610632487A CN 106345471 B CN106345471 B CN 106345471B
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- 239000002131 composite material Substances 0.000 title claims abstract description 39
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 30
- 229910010413 TiO 2 Inorganic materials 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims abstract description 32
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000012153 distilled water Substances 0.000 claims abstract description 16
- 229960000583 acetic acid Drugs 0.000 claims abstract description 15
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 15
- 239000010936 titanium Substances 0.000 claims abstract description 15
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 15
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 15
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052627 muscovite Inorganic materials 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 12
- 239000002245 particle Substances 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 230000001699 photocatalysis Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- AOJJSUZBOXZQNB-VTZDEGQISA-N 4'-epidoxorubicin Chemical group O([C@H]1C[C@@](O)(CC=2C(O)=C3C(=O)C=4C=CC=C(C=4C(=O)C3=C(O)C=21)OC)C(=O)CO)[C@H]1C[C@H](N)[C@@H](O)[C@H](C)O1 AOJJSUZBOXZQNB-VTZDEGQISA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000005297 material degradation process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 150000003608 titanium Chemical class 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/745—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
-
- 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
- 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
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Combustion & Propulsion (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a kind of optically catalytic TiO 2 composite for purifying vehicle exhaust, it is prepared by the raw material including following parts by weight：5~25 parts of titanium source, 0.001~0.01 part of ferric nitrate, 5~30 parts of glacial acetic acid, 2~15 parts of distilled water, 16~80 parts of absolute ethyl alcohol.Material of the present invention, good catalytic effect is respectively provided with ultraviolet light and visible ray, and be easily recycled, recycling degree is high.
Description
Technical field
The invention belongs to nano material preparation technology and application field, more particularly to a kind of dioxy for purifying vehicle exhaust
Change titanium optic catalytic composite material and preparation method thereof.
Background technology
Environment opposing seal in vcehicular tunnel or building, the inside can not discharge there is substantial amounts of vehicle exhaust
Go, not only influence traffic safety, and very big harm, especially nitric oxide (NO), their harmfulness pole are produced to human body
Greatly.Traditional tunnel ventilation air purification mode not only purifies vehicle exhaust, and to obtain effect limited, and ventilation equipment running cost
It is higher.
Nano-titania particle photocatalysis compound action is applied to environmental improvement, compared with traditional processing mode,
With following advantages:
(1) energy consumption is low, and reaction condition is gentle, occurs in ultraviolet light or under sunshine；
(2) reaction speed is fast, and degradation process occurs quickly, to generally require several mins to several hours；
(3) without selectivity, can almost degrade any organic matter, be particularly suitable for degrading polycyclic aromatic hydrocarbons class, more chlorine for degraded
Join benezene material；
(4) secondary pollution is eliminated, organic matter is thoroughly degraded to CO2And H2The advantages such as O.
But there are some defects in the nano-titania particle as photochemical catalyst：(1) greater band gap, it is only capable of absorbing purple
Outer light, is not responded in visible-range, low to ordinary light source utilization rate；(2) recombination rate of photo-generate electron-hole pair is higher, greatly
Its photocatalysis efficiency is have impact on greatly.(3) when nano-titania particle carries out photocatalysis, because its particle is trickle, it is difficult to precipitate,
Catalyst is difficult to reclaim, and active ingredient loss is big, is unfavorable for the regeneration of photochemical catalyst.These shortcomings seriously restrict the technology
Application in tunnel purifying vehicle exhaust.
The content of the invention
(1) technical problems to be solved
It is wide as catalyst to there is band gap for TiO 2 particles of the prior art, catalytic efficiency is low and is difficult to reclaim
The defects of, the present invention provides a kind of optically catalytic TiO 2 composite for purifying vehicle exhaust.
(2) technical scheme
Composite of the present invention, it is prepared by the raw material including following parts by weight；
5~25 parts of titanium source, 0.001~0.01 part of ferric nitrate, 5~30 parts of glacial acetic acid, 2~15 parts of distilled water, absolute ethyl alcohol
16~80 parts.During use, glacial acetic acid, distilled water and absolute ethyl alcohol are used by corresponding parts by volume.
The raw material of composite of the present invention, include the aluminum oxide of 10~100 parts by weight.
The raw material of composite of the present invention, include the muscovite of 2~10 parts by weight.
The raw material of composite of the present invention, the titanium source are titanium class inorganic salts or titanate esters.
The raw material of composite of the present invention, the specific surface area of the aluminum oxide is 300-400m2/g。
The raw material of composite of the present invention, it is preferred that be prepared by the raw material including following parts by weight：
5~25 parts of butyl titanate, 0.001~0.01 part of ferric nitrate, 40~70 parts of aluminum oxide, 4~7 parts of muscovite, ice second
15~25 parts of acid, 8~10 parts of distilled water, 40~56 parts of absolute ethyl alcohol.
It is a further object of the present invention to provide the preparation method of composite of the present invention, comprise the following steps：
1) titanium source is added in the absolute ethyl alcohol of part at room temperature, clear yellow solution A is obtained after stirring 30~50mins；
Distilled water, glacial acetic acid and remaining absolute ethyl alcohol are sufficiently mixed at room temperature, then add ferric nitrate thereto, is sufficiently stirred to be formed
Solution B；
2) at 30~35 DEG C, solution B is added drop-wise in solution A, obtains the colloidal sol of homogeneous transparent, standing forms gel；
3) gel is dried in vacuo at 80~110 DEG C, obtains xerogel；
4) xerogel is calcined at 550~650 DEG C, obtains optically catalytic TiO 2 composite.
The solution B is added in solution A with 1~3 drop/sec of speed, to the solution A with 80 during dropwise addition
~150r/min speed is stirred.
Preferably, following operation is also included between the step 2) and step 3), the colloidal sol is added to saturated oxygen
Change in aluminium, stir 50~70min, stand to it and form gel；
The saturation aluminum oxide is stirred with 50~200r/min speed during the addition；
The preparation method of the saturation aluminum oxide is to weigh a certain amount of aluminum oxide to be soaked in deionized water to saturation,
Discharge unnecessary water；
Preferably, the step 1) is that titanium source is added in the absolute ethyl alcohol of part at room temperature, after stirring 30~50mins
Obtain clear yellow solution A；Distilled water, glacial acetic acid and remaining absolute ethyl alcohol are sufficiently mixed at room temperature, then added thereto
Ferric nitrate and muscovite, are sufficiently stirred to form solution B；
The purification car tail that final object of the present invention is Sustainable use raw material of the present invention and prepared by method
The optically catalytic TiO 2 composite of gas.
(2) beneficial effect
Composite of the present invention has the advantages that：
1) Fe is added in the feed3+, the catalytic efficiency of photocatalysis material of titanium dioxide can be improved, improves its catalytic effect；
2) after the aluminum oxide for further, adding muscovite and high-specific surface area wherein so that catalysis material is ultraviolet
Good catalytic effect is respectively provided with light and visible ray；The titanium dioxide is distributed in aluminum oxide, finally gained is compound
Its particle diameter of material is 0.5~2mm, beneficial to the regeneration of photochemical catalyst, and titanium dioxide being evenly distributed wherein, with reference to
Firmly.
3) method preparation technology of the present invention is simple, and mild condition, controllability is strong, and obtained titanium dioxide is
Detitanium-ore-type, degree of crystallization is good, and crystal grain is grown up rapidly and rolled into a ball firmly phenomenon when avoiding high-temperature calcination crystallization.
In a word, the present invention adds Fe in the feed by selection3+, muscovite and aluminum oxide, improve urging for composite
Change efficiency and recycling rate of waterused, and also there is stronger catalytic performance under visible light, meanwhile, method letter of the present invention
Single, mild condition, controllability is strong, and a kind of good anatase titanium dioxide of degree of crystallization can finally be made.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
The present embodiment is related to a kind of optically catalytic TiO 2 composite, by being prepared including the following raw material：
The present embodiment also provides the preparation method of the composite, comprises the following steps：
1) absolute ethyl alcohol is divided into two parts of absolute ethyl alcohol a30mL and absolute ethyl alcohol b29mL；
Titanium source is added in absolute ethyl alcohol a at room temperature, clear yellow solution A is obtained after stirring 40mins；It will steam at room temperature
Distilled water, glacial acetic acid and absolute ethyl alcohol b are sufficiently mixed, then add ferric nitrate thereto, are sufficiently stirred to form solution B；
2) at 30 DEG C, solution B is added drop-wise in solution A with 1-3 drops/s speed, obtains the colloidal sol of homogeneous transparent；Dripping
During adding, solution A is stirred with 100r/min speed；
3) colloidal sol is dried in vacuo at 100 DEG C, obtains xerogel；
4) xerogel is calcined at 600 DEG C, obtains optically catalytic TiO 2 composite.
Under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 5.1%,
6.2%th, 3.4%, 5.6%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 5.4%, 6.3%,
3.5%th, 5.7%.
Embodiment 2
The present embodiment is related to a kind of optically catalytic TiO 2 composite, and compared with embodiment 1, its difference is, also exists
It is 350m that 40g specific surface areas are added in the raw material2/ g aluminum oxide；Its preparation method is：
1) absolute ethyl alcohol is divided into two parts of absolute ethyl alcohol a 30mL and absolute ethyl alcohol b 29mL；
Titanium source is added in absolute ethyl alcohol a at room temperature, clear yellow solution A is obtained after stirring 40mins；It will steam at room temperature
Distilled water, glacial acetic acid and absolute ethyl alcohol b are sufficiently mixed, then add ferric nitrate thereto, are sufficiently stirred to form solution B；By aluminum oxide
It is dissolved in deionized water and to saturation, discharges unnecessary water, obtains saturation aluminum oxide；
2) at 30 DEG C, solution B is added drop-wise in solution A with 1-3 drops/s speed, obtains the colloidal sol of homogeneous transparent；Dripping
During adding, solution A is stirred with 150r/min speed；
3) colloidal sol is added in saturation aluminum oxide, stirs 50~70min, stood to it and form gel；Addition
During the saturation aluminum oxide is stirred with 100~200r/min speed；
4) gel is dried in vacuo at 100 DEG C, obtains xerogel；
5) xerogel is calcined at 600 DEG C, obtains optically catalytic TiO 2 composite.
Under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 4.6%,
4.9%th, 3.1%, 2.6%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 4.7%, 5.0%,
3.2%th, 2.7%.
Embodiment 3
The present embodiment is related to a kind of optically catalytic TiO 2 composite, and compared with embodiment 1, its difference is, also exists
It is 350m that 40g specific surface areas are added in the raw material2/ g aluminum oxide, and 7g muscovites；Its preparation method is：
1) absolute ethyl alcohol is divided into two parts of absolute ethyl alcohol a 30mL and absolute ethyl alcohol b 29mL；
Titanium source is added in absolute ethyl alcohol a at room temperature, clear yellow solution A is obtained after stirring 40mins；It will steam at room temperature
Distilled water, glacial acetic acid and absolute ethyl alcohol b are sufficiently mixed, then add ferric nitrate and muscovite thereto, are sufficiently stirred to form solution B；
Aluminum oxide is dissolved in deionized water and to saturation, discharges unnecessary water, obtains saturation aluminum oxide；
2) at 30 DEG C, solution B is added drop-wise in solution A with 1-3 drops/s speed, obtains the colloidal sol of homogeneous transparent；Dripping
During adding, solution A is stirred with 150r/min speed；
3) colloidal sol is added in saturation aluminum oxide, stirs 60min, stood to it and form gel；The process of addition
In the saturation aluminum oxide is stirred with 100~200r/min speed；
4) gel is dried in vacuo at 100 DEG C, obtains xerogel；
5) xerogel is calcined at 600 DEG C, obtains optically catalytic TiO 2 composite.
Under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 4.1%,
4.2%th, 3.1%, 2.5%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 3.9%, 4.1%,
3.0%th, 2.5%.
Embodiment 4
Compared with embodiment 3, its difference is, the addition of muscovite is 4g, and other are same as Example 3, gained
Optically catalytic TiO 2 composite,
Under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 3.6%,
3.9%th, 3.1%, 2.8%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 3.7%, 3.8%,
3.2%th, 2.9%.
Embodiment 5
The present embodiment is related to a kind of optically catalytic TiO 2 composite, by the raw material preparation including following parts by weight
Into：
The present embodiment also provides the preparation method of the composite, comprises the following steps：
1) absolute ethyl alcohol is divided into two parts of absolute ethyl alcohol a 11mL and absolute ethyl alcohol b 9mL；
Titanium source is added in absolute ethyl alcohol a at room temperature, clear yellow solution A is obtained after stirring 30mins；It will steam at room temperature
Distilled water, glacial acetic acid and absolute ethyl alcohol b are sufficiently mixed, then add ferric nitrate and muscovite thereto, are sufficiently stirred to form solution B；
Aluminum oxide is dissolved in deionized water and to saturation, discharges unnecessary water, obtains saturation aluminum oxide；
2) at 30 DEG C, solution B is added drop-wise in solution A with 1-3 drops/s speed, obtains the colloidal sol of homogeneous transparent；Dripping
During adding, solution A is stirred with 150r/min speed；
3) colloidal sol is added in saturation aluminum oxide, stirs 50min, stood to it and form gel；The process of addition
In the saturation aluminum oxide is stirred with 100~200r/min speed；
4) gel is dried in vacuo at 80 DEG C, obtains xerogel；
5) xerogel is calcined at 550 DEG C, obtains optically catalytic TiO 2 composite.
Under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 4.0%,
4.0%th, 3.1%, 2.7%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 4.2%, 4.1%,
3.2%th, 2.5%.
Embodiment 6
The present embodiment is related to a kind of optically catalytic TiO 2 composite, by the raw material preparation including following parts by weight
Into：
The present embodiment also provides the preparation method of the composite, comprises the following steps：
1) absolute ethyl alcohol is divided into two parts of absolute ethyl alcohol a 55mL and absolute ethyl alcohol b 45mL；
Titanium source is added in absolute ethyl alcohol a at room temperature, clear yellow solution A is obtained after stirring 50mins；It will steam at room temperature
Distilled water, glacial acetic acid and absolute ethyl alcohol b are sufficiently mixed, then add ferric nitrate and muscovite thereto, are sufficiently stirred to form solution B；
Aluminum oxide is dissolved in deionized water and to saturation, discharges unnecessary water, obtains saturation aluminum oxide；
2) at 35 DEG C, solution B is added drop-wise in solution A with 1-3 drops/s speed, obtains the colloidal sol of homogeneous transparent；Dripping
During adding, solution A is stirred with 80r/min speed；
3) colloidal sol is added in saturation aluminum oxide, stirs 70min, stood to it and form gel；The process of addition
In the saturation aluminum oxide is stirred with 100~200r/min speed；
4) gel is dried in vacuo at 80 DEG C, obtains xerogel；
5) xerogel is calcined at 550 DEG C, obtains optically catalytic TiO 2 composite.
Under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 3.8%,
3.9%th, 3.1%, 3.6%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 3.6%, 3.6%,
2.9%th, 3.5%.
Comparative example 1
Compared with embodiment 1, its difference is, ferric nitrate is not added in the raw material, and gained optically catalytic TiO 2 is answered
Condensation material, under the conditions of ultraviolet source to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 5.5%,
6.5%th, 5%, 6.3%.
Under incandescent lamp to vehicle exhaust in CO, CO2、HC、NOX60mins degraded be respectively 8%, 9.7%,
6.3%th, 7.9%.
It can be seen that by above example and comparative example, can effectively be degraded using product made from raw material of the present invention
Harmful substance in vehicle exhaust, improves the solution rate to harmful substance, and the percentage composition of the harmful substance after degraded in tail gas is bright
Aobviously less than the harmful substance in the tail gas for not using material degradation of the present invention.
Although above the present invention is made to retouch in detail with general explanation, embodiment and experiment
State, but on the basis of the present invention, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, are belonged to claimed
Scope.
Claims (7)
1. a kind of optically catalytic TiO 2 composite for purifying vehicle exhaust, it is characterised in that by including following parts by weight
Raw material is prepared as follows forming：
5~25 parts of titanium source, 0.001~0.01 part of ferric nitrate, 5~30 parts of glacial acetic acid, 2~15 parts of distilled water, absolute ethyl alcohol 16~
80 parts；10~100 parts of aluminum oxide；2~10 parts of muscovite；
1) titanium source is added in the absolute ethyl alcohol of part at room temperature, clear yellow solution A is obtained after stirring 30~50mins；Room temperature
It is lower to be sufficiently mixed distilled water, glacial acetic acid and remaining absolute ethyl alcohol, then ferric nitrate and muscovite are added thereto, it is sufficiently stirred
Form solution B；
2) at 30~35 DEG C, solution B is added drop-wise in solution A, obtains the colloidal sol of homogeneous transparent, the colloidal sol is added to saturation
In aluminum oxide, stir 50~70min, stand to its formed gel, the preparation method of the saturation aluminum oxide be weigh it is a certain amount of
Aluminum oxide be soaked in deionized water and to saturation, discharge unnecessary water；
3) gel is dried in vacuo at 80~110 DEG C, obtains xerogel；
4) xerogel is calcined at 550~650 DEG C, obtains optically catalytic TiO 2 composite.
2. composite according to claim 1, it is characterised in that the titanium source is titanium class inorganic salts or titanate esters.
3. composite according to claim 1 or 2, it is characterised in that the specific surface area of the aluminum oxide is 300-
400m2/g。
4. composite according to claim 1 or 2, it is characterised in that by the raw material preparation including following parts by weight
Into：
5~25 parts of butyl titanate, 0.001~0.01 part of ferric nitrate, 40~70 parts of aluminum oxide, 4~7 parts of muscovite, glacial acetic acid 15
~25 parts, 8~10 parts of distilled water, 40~56 parts of absolute ethyl alcohol.
5. composite according to claim 3, it is characterised in that be prepared by the raw material including following parts by weight：
5~25 parts of butyl titanate, 0.001~0.01 part of ferric nitrate, 40~70 parts of aluminum oxide, 4~7 parts of muscovite, glacial acetic acid 15
~25 parts, 8~10 parts of distilled water, 40~56 parts of absolute ethyl alcohol.
A kind of 6. side for the optically catalytic TiO 2 composite for preparing any one of Claims 1 to 5 purification vehicle exhaust
Method, it is characterised in that comprise the following steps：
1) titanium source is added in the absolute ethyl alcohol of part at room temperature, clear yellow solution A is obtained after stirring 30~50mins；Room temperature
It is lower to be sufficiently mixed distilled water, glacial acetic acid and remaining absolute ethyl alcohol, then ferric nitrate and muscovite are added thereto, it is sufficiently stirred
Form solution B；
2) at 30~35 DEG C, solution B is added drop-wise in solution A, obtains the colloidal sol of homogeneous transparent, the colloidal sol is added to saturation
In aluminum oxide, 50~70min is stirred, stands to it and forms gel；
3) gel is dried in vacuo at 80~110 DEG C, obtains xerogel；
4) xerogel is calcined at 550~650 DEG C, obtains optically catalytic TiO 2 composite.
7. the optically catalytic TiO 2 composite of purification vehicle exhaust prepared by claim 6 methods described.
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| CN101219371A (en) * | 2007-01-08 | 2008-07-16 | 北京化工大学 | Photocatalysis oxidation treated high concentration organic trade waste |
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| CN101219371A (en) * | 2007-01-08 | 2008-07-16 | 北京化工大学 | Photocatalysis oxidation treated high concentration organic trade waste |
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