CN105195130A - Strontium barium niobate series photo-catalyst normal-temperature degradation hydrocarbon compound - Google Patents
Strontium barium niobate series photo-catalyst normal-temperature degradation hydrocarbon compound Download PDFInfo
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- CN105195130A CN105195130A CN201510690530.8A CN201510690530A CN105195130A CN 105195130 A CN105195130 A CN 105195130A CN 201510690530 A CN201510690530 A CN 201510690530A CN 105195130 A CN105195130 A CN 105195130A
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- WOIHABYNKOEWFG-UHFFFAOYSA-N [Sr].[Ba] Chemical compound [Sr].[Ba] WOIHABYNKOEWFG-UHFFFAOYSA-N 0.000 title claims description 8
- 239000011941 photocatalyst Substances 0.000 title abstract description 11
- 230000015556 catabolic process Effects 0.000 title abstract description 4
- 238000006731 degradation reaction Methods 0.000 title abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 title description 7
- 239000003054 catalyst Substances 0.000 claims abstract description 50
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052737 gold Inorganic materials 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 4
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 4
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 4
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 5
- 239000008246 gaseous mixture Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 12
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 6
- 229930195733 hydrocarbon Natural products 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 3
- -1 methane hydrocarbon Chemical class 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 abstract 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 29
- 239000005977 Ethylene Substances 0.000 description 23
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 239000001294 propane Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- 230000000593 degrading effect Effects 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000007146 photocatalysis Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 206010068319 Oropharyngeal pain Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 201000007100 Pharyngitis Diseases 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000791 photochemical oxidant Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 238000002256 photodeposition Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000000935 solvent evaporation Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
Classifications
-
- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/20—Capture or disposal of greenhouse gases of methane
Landscapes
- Catalysts (AREA)
Abstract
The invention relates to a ywt%M-SrxBa1-xNb2O6 series photo-catalyst normal-temperature degradation non-methane hydrocarbon (NMHC) technology. The catalyst is shown as a general formula: ywt%M-SrxBa1-xNb2O6, wherein M is one of Pt, Ag, Au, Pd, Ru, Fe, Co, Ni and Cu; x is greater than or equal to 0.4 and less than or equal to 0.8; y is greater than or equal to 0 and less than or equal to 4. The ywt%M-SrxBa1-xNb2O6 series photo-catalyst has the advantages of low cost, high photo-catalytic activity and high stability, and NMHC gas can be subjected to efficient photo-catalytic degradation at a normal temperature by simulation of sunlight radiation. Meanwhile, the photo-catalyst is very easy to recycle, and has a very good application prospect in removal of NMHC gas from atmospheric air at the normal temperature and a normal pressure and under a mild condition.
Description
Technical field
The present invention relates to a kind of strontium barium niobate system photochemical catalyst normal temperature degraded NMHC (NMHC) technology, belong to inorganic field of photocatalytic material.
Background technology
According to " China Environmental State Bulletin " display that People's Republic of China's Environmental Protection Department is issued for 2014,2014, national air quality city up to standard only accounted for less than one one-tenth.Air-polluting main matter is caused to comprise carbon monoxide (CO), nitrogen oxide (NO
x), hydrocarbon (HC), oxysulfide and particle (PM) etc.In hydrocarbon, NMHC (NMHC) is an important part.NMHC, all volatilizable hydrocarbon compound namely except methane.This class material has larger photochemical activity, is the precursor forming photochemical fog.The artificial source of NMHC mainly contains gasoline combustion, burning, solvent evaporation, oil evaporation and transport loss and refuse refines, and this five class accounts for about 96% of hydrocarbon anthropogenic discharge amount.The kind that NMHC comprises is a lot, and these materials can form photochemical oxidant and particulate in city and rural atmosphere because of photochemical reaction, work the mischief to environment and the mankind.NMHC (NMHC) and nitrogen oxide (NO
x) under the radiation of sunshine, reaction can generate secondary pollution as peroxyacyl nitrate (PAN), secondary particulate (SOA) and ozone (O
3) etc., and the existence of volatile organic matter (VOCs) also can cause fine particle as the increase of PM2.5 concentration.Nineteen fifty-five, the photochemical fog event of Los Angeles,U.S generation caused the dead people more than 400 of over-65s old man, and the symptom such as ten hundreds of people extremely sees red, have sore throat, brain is vexed torment, and meanwhile forest, vegetation, crops sparetime university area are injured; The whole city that the photochemical fog event that Tokyo in 1970 occurs is is injured 6000 people.Since 2013, the weather of national haze brings inconvenience to daily life, meanwhile brings, and is the rising of the incidence of disease such as respiratory disease, heart disease.Naturally constantly remind us, the task of administering NMHC pollutant in air has been very urgent, extremely urgent.
NMHC has the features such as kind is many, concentration is low, difficult absorption, causes it to be difficult to be degraded.In current elimination environment, the method for NMHC mainly contains physisorphtion, thermocatalytic method, strong oxidizer oxidizing process and photocatalytic method.Physisorphtion adopts active carbon and molecular sieve etc. to adsorb NMHC, but adsorbance is limited, and easy desorption at an elevated temperature.Treatment temperature needed for thermocatalytic method heat is higher, consumes energy larger.Strong oxdiative method adopts the method for chemistry, make hydrocarbon gas be converted degraded, but oxidant itself is easier to environment by strong oxidizer.And utilize the photocatalysis method of Driven by Solar Energy to be one of the effective scheme of NMHC of at room temperature degrading.Adopt TiO both at home and abroad at present more
2carry out light catalytic purifying NMHC gas, but due to TiO
2surface has higher electronics and hole-recombination rate, thus lower to the utilization rate of sunshine, thus develops the photochemical catalyst that effectively can be separated photo-generated carrier and is significant.Ferroelectric material, when lower than Curie temperature, has spontaneous polarization effect.The carrier that catalyst produces after illumination by be subject to spontaneous polarization effect produce small electrical field effect under be separated, effectively decrease the compound in light induced electron and hole.Up to now, strontium barium niobate series photochemical catalyst has no any type of report in light catalytic purifying NMHC.
Summary of the invention
The object of the invention is to strontium barium niobate system (expressed by the following formula: ywt%M-Sr
xba
1-xnb
2o
6, in general formula, M is the one in Pt, Ag, Au, Pd, Rh, Ru, Fe, Co, Ni, Cu element, and the value of x is 0.4≤x≤0.8, and the value of y is 0≤y≤4) and photochemical catalyst is used for photocatalytic degradation NMHC gas under normal temperature.
The invention provides a kind of strontium barium niobate system photochemical catalyst, its purposes is normal-temperature light catalytic degradation NMHC gas.
The invention provides the preparation method of above-mentioned strontium barium niobate system photochemical catalyst, comprise the following steps:
Step one, by SrCO
3powder, BaCO
3powder and Nb
2o
5powder is according to stoichiometric proportion precise and mix, and the ratio of the amount of substance of each material is: (SrCO
3: BaCO
3: Nb
2o
5)=n:(10-n): 10, in general formula, n value is 4≤n≤8;
Step 2, the KCl powder of mixture step one obtained and corresponding proportion puts into ball grinder, and mixed-powder is 1:2 with the ratio of the amount of substance of KCl, and after adding 10-20mL ethanol, ball milling 5-18h forms even suspension, is reaction raw materials;
Step 3, suspension step 2 obtained is dried, and is positioned over 1173K-1573K in Muffle furnace and calcines 2-8 hour, obtain the Sr containing fused salt after grinding
xba
1-xnb
2o
6(0.4≤x≤0.8) powder.Powder intermediate water and ethanol are respectively cleaned 3 times and washes away fused salt, obtain pure Sr
xba
1-xnb
2o
6(0.4≤x≤0.8) photochemical catalyst, grinds stand-by.
Step 4, adopts the Sr that Photodeposition obtains in step 3
xba
1-xnb
2o
6powder supports noble metal, and wherein supported noble metal can be any one in Pt, Ag, Au, Pd, Ru, Fe, Co, Ni, Cu element.
According to the present invention, described ywt%M-Sr
xba
1-xnb
2o
6the x value preferably 0.8 of series photochemical catalyst; Described ywt%M-Sr
xba
1-xnb
2o
6series photochemical catalyst M loading is preferably: 1% (mass fraction).Prepared ywt%M-Sr
xba
1-xnb
2o
6series photochemical catalyst microscopic appearance is bar-shaped, and its length is between 4.0-6.0 μm, and its width is between 0.40-0.60 μm, and its length-width ratio is between 9.00 ~ 13.00, and the specific area of described composite photo-catalyst is at 0.4-3.5m
2between/g.
According to the present invention, described NMHC gas is volatility NMHC gas pollutant, is preferably ethene, propylene, propane, ethane.The concentration of described photocatalytic degradation NMHC gas is in below 200ppm, and wherein NMHC gas is the gaseous mixture of one-component NMHC gas or multiple NMHC gas composition.
Accompanying drawing explanation
Fig. 1 is Sr
xba
1-xnb
2o
6the abosrption spectrogram of (0.4≤x≤0.8) serial photochemical catalyst.
Fig. 2 is 1wt%Pt-Sr
xba
1-xnb
2o
6the abosrption spectrogram of (0.4≤x≤0.8) serial photochemical catalyst.
Fig. 3 is 1wt%Pt-Sr
0.8ba
0.2nb
2o
6the scanning electron microscope (SEM) photograph of photochemical catalyst.
Fig. 4 is 1wt%Pt-Sr
xba
1-xnb
2o
6the datagram of (0.4≤x≤0.8) serial photochemical catalyst photocatalytic degradation of ethylene under simulated solar irradiation fixed bed condition.
Fig. 5 is 1wt%Pt-Sr
0.8ba
0.2nb
2o
6the datagram of photochemical catalyst photocatalytic degradation of ethylene stability test under simulated solar irradiation fixed bed condition.
Fig. 6 is ywt%Pt-Sr
0.8ba
0.2nb
2o
6the datagram of (0≤y≤4) catalyst series photocatalytic degradation of ethylene under simulated solar irradiation fixed bed condition.
Figure 71 wt%Pt-Sr
xba
1-xnb
2o
6the datagram of (0.4≤x≤0.8) serial photochemical catalyst photocatalytic degradation propane under simulated solar irradiation fixed bed condition.
Detailed description of the invention
Technical scheme of the present invention and effect is illustrated below in conjunction with accompanying drawing.
Embodiment 1:
This example provides a kind of ywt%M-Sr
xba
1-xnb
2o
6series photochemical catalyst, its formula composed as follows represents: Sr
xba
1-xnb
2o
6, wherein the value of x is the value of 0.4-0.8, y is 0.Preparation method is as follows:
By SrCO
3, BaCO
3, Nb
2o
5and KCl forms even suspension according to corresponding stoichiometric coefficient than adding ethanol ball milling after mixing.Obtain mixed-powder after being dried by suspension, then transferred in alumina crucible, to be placed in Muffle furnace 1373K heat treatment 3 hours, to obtain the Sr containing fused salt
xba
1-xnb
2o
6(0.4≤x≤0.8) powder.Wash away fused salt 3 times with intermediate water and ethanol purge, obtain pure Sr
xba
1-xnb
2o
6(0.4≤x≤0.8) photochemical catalyst, grinds stand-by.
Embodiment 2:
This example provides a kind of ywt%M-Sr
xba
1-xnb
2o
6series photochemical catalyst, its formula composed as follows represents: ywt%Pt-Sr
xba
1-xnb
2o
6, wherein the value of M to be the value of Pt, x be 0.4-0.8, y is 0.5-4.Preparation method is as follows:
Take Sr prepared by embodiment 1 respectively
xba
1-xnb
2o
6(0.4≤x≤0.8) catalyst 0.2g, adds 150mL20% methanol solution, and the H of corresponding concentration
2ptCl
6sample is obtained after illumination 10h.Ywt%Pt-Sr is obtained through deionized water and ethanol wash 3 post-dryings
xba
1-xnb
2o
6(0.4≤x≤0.8,0.5≤y≤4) serial photochemical catalyst.Embodiment 3:
This example provides a kind of ywt%M-Sr
xba
1-xnb
2o
6series photochemical catalyst, its formula composed as follows represents: ywt%Ag-Sr
xba
1-xnb
2o
6, wherein the value of M to be the value of Ag, x be 0.4-0.8, y is 1.Preparation method is as follows:
Take Sr prepared by embodiment 1 respectively
xba
1-xnb
2o
6(0.4≤x≤0.8) catalyst 0.2g, adds 150mL20% methanol solution, and the AgNO of corresponding concentration
3, after illumination 10h, obtain sample.1wt%Ag-Sr is obtained through deionized water and ethanol wash 3 post-dryings
xba
1-xnb
2o
6(0.4≤x≤0.8) serial photochemical catalyst.
Embodiment 4:
1wt%Pt-Sr
xba
1-xnb
2o
6the fixed bed photocatalytic degradation of ethylene gas of (0.4≤x≤0.8) catalyst.
The photocatalysis performance test of photochemical catalyst fixed bed degrading ethylene gas of the present invention, carries out under normal temperature, simulated solar irradiation.Implementation process is as follows:
Take 1wt%Pt-Sr prepared by embodiment 2 respectively
xba
1-xnb
2o
6(0.4≤x≤0.8) catalyst series 0.2g, tiling is bottom the Photoreactor of 450mL to volume, is sealed by reactor.90 μ L high-purity ethylene gases are injected with in gas Trace bio-element device phototropic reaction device.Open 300WXe lamp source afterwards.Every sampling in 1 minute, adopt the change of ethylene gas concentration in gas chromatograph detection reaction device.
Test result as shown in Figure 4, under the irradiation of simulated solar irradiation, 1wt%Pt-Sr
xba
1-xnb
2o
6(0.4≤x≤0.8) catalyst shows good photocatalytic degradation of ethylene ability, and Sr/Ba comparison 1wt%Pt-Sr
xba
1-xnb
2o
6the photocatalytic activity of (0.4≤x≤0.8) has considerable influence.Wherein 1wt%Pt-Sr
0.4ba
0.6nb
2o
6photocatalyst for degrading ethene performance is the poorest, by degradable for the ethylene gas of 200ppm in 14min; And 1wt%Pt-Sr
0.8ba
0.2nb
2o
6photocatalyst for degrading ethene best performance, can by degradable for the ethylene gas of 200ppm in 7min.
Embodiment 5:
1wt%Pt-Sr
0.8ba
0.2nb
2o
6the fixed bed photocatalytic degradation of ethylene stability test of catalyst.
The photocatalysis performance stability test of photochemical catalyst fixed bed degrading ethylene gas of the present invention, carries out under normal temperature, simulated solar irradiation.Implementation process is as follows:
Take 1wt%Pt-Sr prepared by embodiment 2 respectively
0.8ba
0.2nb
2o
6catalyst series 0.2g, tiling is bottom the Photoreactor of 450mL to volume, is sealed by reactor.90 μ L high-purity ethylene gases are injected with in gas Trace bio-element device phototropic reaction device.Open 300WXe lamp source afterwards.Every sampling in 1 minute, adopt the change of ethylene gas concentration in gas chromatograph detection reaction device.When ethylene concentration detected value is 0, refills same concentrations ethene and repeat abovementioned steps 6 times.
Test result as shown in Figure 5, under the irradiation of simulated solar irradiation, 1wt%Pt-Sr
0.8ba
0.2nb
2o
6catalyst shows good photocatalytic degradation of ethylene stability.The phenomenon that catalyst activity weakens is there is not in 6 loop tests.
Embodiment 6:
Ywt%Pt-Sr
0.8ba
0.2nb
2o
6the fixed bed photocatalytic degradation of ethylene gas of (0≤y≤4) catalyst.
The photocatalysis performance test of photochemical catalyst fixed bed degrading ethylene gas of the present invention, carries out under normal temperature, simulated solar irradiation.Implementation process is as follows:
Take the Sr in embodiment 1 respectively
0.8ba
0.2nb
2o
6ywt%Pt-Sr prepared by sample and embodiment 2
0.8ba
0.2nb
2o
6(0.5≤y≤4) catalyst series 0.2g, tiling is bottom the Photoreactor of 450mL to volume, is sealed by reactor.90 μ L high-purity ethylene gases are injected with in gas Trace bio-element device phototropic reaction device.Open 300WXe lamp source afterwards.Every sampling in 0.5 ~ 1 minute, adopt the change of ethylene gas concentration in gas chromatograph detection reaction device.
Test result as shown in Figure 6, under the irradiation of simulated solar irradiation, ywt%Pt-Sr
0.8ba
0.2nb
2o
6(0.5≤y≤4) catalyst shows good photocatalytic degradation of ethylene ability, and Pt content (y value) is to ywt%Pt-Sr
0.8ba
0.2nb
2o
6the photocatalytic activity of (0≤y≤4) has considerable influence.Wherein Sr
0.8ba
0.2nb
2o
6photocatalyst for degrading ethene performance is the poorest, can by the ethylene gas of 200ppm degraded 60% in 3h; And 4wt%Pt-Sr
0.8ba
0.2nb
2o
6photocatalyst for degrading ethene best performance, can by degradable for the ethylene gas of 200ppm in 2min.
Embodiment 7:
1wt%Pt-Sr
xba
1-xnb
2o
6the fixed bed photocatalytic degradation propane gas of (0.4≤x≤0.8) catalyst.
The photocatalysis performance test of photochemical catalyst fixed bed degraded propane gas of the present invention, carries out under normal temperature, simulated solar irradiation.Implementation process is as follows:
Take 1wt%Pt-Sr prepared by embodiment 2
xba
1-xnb
2o
6(0.4≤x≤0.8) catalyst series 0.2g, tiling is bottom the Photoreactor of 450mL to volume, is sealed by reactor.90 μ L high-purity propane gases are injected with in gas Trace bio-element device phototropic reaction device.Open 300WXe lamp source afterwards.First time, every septum secundum sampled for 30 minutes afterwards every sampling in 15 minutes.Adopt the change of propane gas concentration in gas chromatograph detection reaction device.
Test result as shown in Figure 7, under the irradiation of simulated solar irradiation, 1wt%Pt-Sr
xba
1-xnb
2o
6(0.4≤x≤0.8) catalyst shows good photocatalytic degradation propane ability, and Sr/Ba comparison Sr
xba
1-xnb
2o
6the photocatalytic activity of (0.4≤x≤0.8) has considerable influence.Wherein 1wt%Pt-Sr
0.4ba
0.6nb
2o
6photocatalyst for degrading propane performance is the poorest, can by the propane of 200ppm degraded 50% in 2h; And 1wt%Pt-Sr
0.8ba
0.2nb
2o
6photocatalyst for degrading propane best performance, can by degradable for the propane of 200ppm in 2h.
Catalytic degradation NMHC gas aspect has good photocatalytic activity and stability, under normal temperature condition, have extraordinary application value in photocatalytic degradation NMHC.
Claims (4)
1. a strontium barium niobate series photochemical catalyst, is characterized in that: its composition is expressed by the following formula: ywt%M-Sr
xba
1-xnb
2o
6, in general formula, M is the one in Pt, Ag, Au, Pd, Rh, Ru, Fe, Co, Ni, Cu element, and the value of x is 0.4≤x≤0.8, and the value of y is 0≤y≤4.
2. catalyst according to claim 1, is characterized in that: described catalyst microscopic appearance is powder or film, and wherein the particle size of powder is at 0 ~ 6 μm.
3. the purposes of catalyst described in claim 1 or 2, is characterized in that: the photocatalytic degradation of described catalyst application NMHC gas in normal temperature environment.
4. purposes according to claim 3, is characterized in that: described NMHC is the gaseous mixture of one-component gas or multiple gases composition.
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|---|---|---|---|
| CN201510690530.8A CN105195130B (en) | 2015-10-22 | 2015-10-22 | Strontium barium niobate system photochemical catalyst normal temperature degraded hydrocarbon |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510690530.8A CN105195130B (en) | 2015-10-22 | 2015-10-22 | Strontium barium niobate system photochemical catalyst normal temperature degraded hydrocarbon |
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| CN103861590A (en) * | 2014-03-19 | 2014-06-18 | 中国科学院福建物质结构研究所 | Noble metal loaded potassium niobate photocatalyst for ethylene photocatalytic degradation |
| CN104826484A (en) * | 2015-03-26 | 2015-08-12 | 中国科学院福建物质结构研究所 | Normal-temperature hydrocarbon degradation technique by nanometer TiO2/WO3 composite photocatalyst |
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| CN103861590A (en) * | 2014-03-19 | 2014-06-18 | 中国科学院福建物质结构研究所 | Noble metal loaded potassium niobate photocatalyst for ethylene photocatalytic degradation |
| CN104826484A (en) * | 2015-03-26 | 2015-08-12 | 中国科学院福建物质结构研究所 | Normal-temperature hydrocarbon degradation technique by nanometer TiO2/WO3 composite photocatalyst |
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