CN107349931A - Photoreactivation catalyst of degraded indoor pollutant and preparation method thereof - Google Patents
Photoreactivation catalyst of degraded indoor pollutant and preparation method thereof Download PDFInfo
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- CN107349931A CN107349931A CN201710793492.8A CN201710793492A CN107349931A CN 107349931 A CN107349931 A CN 107349931A CN 201710793492 A CN201710793492 A CN 201710793492A CN 107349931 A CN107349931 A CN 107349931A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 61
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 29
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 158
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000002131 composite material Substances 0.000 claims abstract description 24
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000001354 calcination Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000809 air pollutant Substances 0.000 claims abstract description 9
- 231100001243 air pollutant Toxicity 0.000 claims abstract description 9
- 239000000725 suspension Substances 0.000 claims abstract description 9
- 239000012153 distilled water Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007540 photo-reduction reaction Methods 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 238000000746 purification Methods 0.000 claims abstract description 5
- 239000010931 gold Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 230000000593 degrading effect Effects 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 description 13
- 238000006731 degradation reaction Methods 0.000 description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 230000001699 photocatalysis Effects 0.000 description 3
- 238000002256 photodeposition Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 229910021650 platinized titanium dioxide Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/58—Platinum group metals with alkali- or alkaline earth metals
-
- 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
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
Photoreactivation catalyst of degraded indoor pollutant and preparation method thereof, is related to photochemical catalyst.The chemical formula of the photoreactivation catalyst of degraded indoor pollutant is Au TiO2/NaOH.Nano titanium oxide is put into container, adds distilled water in a reservoir, stirs, forms white suspension；NaOH is added in obtained white suspension, is stirred, is washed, is centrifuged, is dried, calcining, obtains composite catalyst TiO2/NaOH；Au is supported on composite catalyst TiO using photoreduction met hod2On/NaOH, the photoreactivation catalyst Au TiO of degraded indoor pollutant are produced2/NaOH.The photoreactivation catalyst of the degraded indoor pollutant can be applied under light conditions indoors, can be used particularly for the purification of gas phase indoor air pollutants.
Description
Technical field
, being capable of efficient degradation room air pollution under low light condition more particularly, to one kind the present invention relates to photochemical catalyst
Photoreactivation catalyst of degraded indoor pollutant of thing and preparation method thereof.
Background technology
With the continuous lifting of china's overall national strength, the housing condition of people is also progressively improved, and fits up material on the market
Material is also varied, but pollution also becomes increasingly severe caused by these finishing materials, and the health to people causes
Great hidden danger.How the air pollution of interior is effectively administered, and to the health of people, the quality of life for improving people has extensively
General meaning.At present, conventional governing measure ventilation process can disperse the pollutant of interior, but can only handle furniture and distribute
Partial contamination thing out, it is a kind of method cured the symptoms, not the disease.Therefore a kind of green, nontoxic, non-secondary pollution place is developed
Reason means are imperative.Wherein photocatalysis technology is because cost is low, the gentle, non-secondary pollution of safe and non-toxic, reaction condition etc. is excellent
Point turns into a kind of technology of preferably indoor environment purification.But requirement of the photocatalysis technology to illumination condition is harsher, leads
It is caused to receive certain limitation among the application of reality.For this practical problem, some researchers begin one's study
Some catalyst that indoor pollutant can be purified under low light condition.In recent years, changed using sulfuric acid or highly basic
The current potential of catalyst surface can be good at adsorbing, and activate organic pollution, be advantageous to improve the detergent power of catalyst.
The content of the invention
It is an object of the invention to for existing photochemical catalyst sensitiveness to light is inadequate, there is illumination condition in confined space
The problems such as limit, there is provided prepared photochemical catalyst have the reference area that nano-scale is small, high, can under low light condition effectively
Degrade indoor air pollutants, preparation method is simple, raw material is cheap and easy to get, can large-scale application, economic and social benefit it is notable
Degraded indoor pollutant photoreactivation catalyst and preparation method thereof.
The chemical formula of the photoreactivation catalyst of the degraded indoor pollutant is Au-TiO2/NaOH。
The preparation method of the photoreactivation catalyst of the degraded indoor pollutant comprises the following steps：
1) nano titanium oxide is put into container, adds distilled water in a reservoir, stirred, form white suspension；
2) NaOH is added in the white suspension that step 1) obtains, stirred, washed, centrifuged, dried, calcining, obtained compound
Catalyst TiO2/NaOH；
3) Au is supported on composite catalyst TiO using photoreduction met hod2On/NaOH, the light of degraded indoor pollutant is produced
Composite catalyst Au-TiO2/NaOH。
In step 1), the time of the stirring can be 0.5~24h.
In step 2), the condition of the calcining can in Muffle furnace 200~400 DEG C of 0.5~2h of calcining；The stirring can
0.5~24h is kept stirring under conditions of ultra violet lamp.
In step 3), the predecessor of Au load can be gold chloride, or other golden solubility salts.
The NaOH can use other strong base substances.
The method that the present invention utilizes photo-reduction using load Au.
The photoreactivation catalyst of the degraded indoor pollutant can be applied under light conditions indoors, can be used particularly for gas
The purification of phase indoor air pollutants.
The composite catalyst of efficient degradation indoor air pollutants is a kind of composite catalyst using titanium dioxide as matrix,
Chemical formula is Au-TiO2/NaOH.Composite catalyst has that size is small, high-specific surface area, and Au loads can effectively extend light and urge
The response wave length of agent, be advantageous to aoxidize organic pollution, NaOH not only can effectively change TiO2The property on surface, and it is right
Pollutant has certain activation, promotes catalysed oxidn.
The preparation method of the composite catalyst of efficient degradation indoor air pollutants is traditional stirring-calcination method.
The present invention solves photochemical catalyst and looks after the problems such as insufficient in purification of air indoors.Catalysis prepared by the present invention
Agent has the advantages that small size, high-specific surface area, activation pollutant reduce reaction potential energy.Preparation method of the present invention is simple, raw material
Inexpensively, there is certain economic benefit.
The beneficial effects of the present invention are：
(1) present invention is first by Au-TiO2In terms of/NaOH is applied to catalytic degradation indoor air pollutants, Au can have
The increase TiO of effect2Catalysis oxidation ability, make its degradable organic pollutant under low light condition, and NaOH can be with effective activation
Pollutant improves its catalytic performance and efficiently degraded indoor air pollutants.
(2) present invention is using efficient easily stirring-calcination method, by adjusting Au and matrix ratio, reaction system
Mixing time, calcination time, substep synthesize the composite catalyst Au-TiO of different proportion2/ NaOH, preparation flow is simple, favorably
In large-scale industrial production.
(3) photoreactivation catalyst Au-TiO2/ NaOH can efficient degradation indoor air pollutants, while have good
Activity stability.Separating treatment can be easily carried out in reaction system, catalyst renewable is strong, and repetitive rate is high, tool
There are very high practical value and application prospect.
Brief description of the drawings
Fig. 1 is TiO of the present invention2, TiO2/ NaOH and Pt-TiO2Gas phase degradation of formaldehyde under/NaOH catalyst low light conditions
Situation.
Fig. 2 is Pt-TiO of the present invention2The estimation of stability figure of/NaOH catalyst.
Embodiment
The preparation process of the present invention is as follows：
Given commodity titanium dioxide is put into container, a certain amount of distilled water is added into container, at room temperature
1~2h is stirred, uniform white suspension is formed, then a certain amount of NaOH solution is slowly dropped in above-mentioned suspension, held
1~2h of continuous stirring, product obtain described composite catalyst TiO by washing, centrifugation, drying and calcining2/ NaOH, it is then sharp
A certain amount of Au is carried on TiO with photoreduction met hod2Au-TiO is prepared on/NaOH2/ NaOH composite catalysts.
Specific embodiment given below.
Embodiment 1
Composite catalyst Au-TiO with efficient gas phase degradation capability2/ NaOH preparation.
A certain amount of P25 is put into container, adds 60mL distilled water, 30min is stirred at room temperature, is formed uniform
White suspension, the pH of above-mentioned turbid is adjusted to 13 with sodium hydroxide solution, 1h is persistently stirred, then centrifuges product, wash
Wash, dry and calcine 2h under the conditions of 400 DEG C, obtain TiO2/ NaOH composite catalysts, 1%Au is born followed by photoreduction met hod
It is loaded in above-mentioned TiO2Au-TiO is obtained on/NaOH2/NaOH.Fig. 1 is given at TiO under low light condition2, TiO2/ NaOH and Au-
TiO2/ NaOH catalyst is schemed in the activity of gas phase degradation of formaldehyde, it can be found that prepared composite catalyst Au- from Fig. 1
TiO2/ NaOH shows the ability of outstanding catalytic degradation formaldehyde, and TiO2And TiO2/ NaOH catalyst performances are compared with Pt-TiO2/
NaOH performance is low.Fig. 2 provides Au-TiO2/ NaOH gas phase degradation of formaldehyde stability diagram, from Fig. 2 it is observed that
Prepared catalyst is passing through 50h degradation experiment, can still keep higher activity.Illustrate the catalysis in gas phase degraded first
Outstanding catalytic stability is shown in aldehyde reaction.Therefore composite catalyst Au-TiO2/ NaOH may be dirty in processing room air
It is a very promising catalyst in terms of dye.
Embodiment 2
A certain amount of P25 is added in container, 60mL distilled water is added to container, is stirred until homogeneous the suspended of white
Liquid, the pH of above-mentioned turbid is then adjusted to 13 with sodium hydroxide, 1h is stirred, then centrifuges product, washs, dries 500
2h is calcined under the conditions of DEG C, obtains TiO2/ NaOH composite catalysts, 0.5%Au is carried on followed by Photodeposition above-mentioned
TiO2Au-TiO is obtained on/NaOH2/ NaOH composite catalysts.
Embodiment 3
A certain amount of P25 is added in container, 60mL distilled water is added to container, is stirred until homogeneous the suspended of white
Liquid, the pH of above-mentioned turbid is then adjusted to 14 with sodium hydroxide, 2h is stirred, then centrifuges product, washs, dries 600
2h is calcined under the conditions of DEG C, obtains TiO2/ NaOH composite catalysts, 1.5%Au is carried on followed by Photodeposition above-mentioned
TiO2Au-TiO is obtained on/NaOH2/ NaOH composite catalysts.
Embodiment 4
A certain amount of P25 is added in container, 60mL distilled water is added to container, is stirred until homogeneous the suspended of white
Liquid, the pH of above-mentioned turbid is then adjusted to 14 with sodium hydroxide, 2h is stirred, then centrifuges product, washs, dries 400
1h is calcined under the conditions of DEG C, obtains TiO2/ NaOH composite catalysts, 1%Au is carried on followed by Photodeposition above-mentioned
TiO2Au-TiO is obtained on/NaOH2/ NaOH composite catalysts.
It the foregoing is only presently preferred embodiments of the present invention.
The present invention can under normal temperature, low light condition efficient degradation indoor pollutant photochemical catalyst Au-TiO2/ NaOH and
Its preparation method and application, described several catalyst are researched and developed on the basis of titanium dioxide, intend to solve traditional photocatalysis
Agent does not have the problems such as ultraviolet light, degradation efficiency is low in actual applications.Matrix TiO is handled by highly basic2, then by your gold
Category Au is loaded on the material, and this composite A u-TiO is synthesized using the simple step of pretreatment-load two2/NaOH.This hair
The catalyst of bright preparation has the performance that indoor pollutant is decomposed under visible light conditions, therefore can preferably be applied to processing
Indoor pollutant, mainly there are formaldehyde, benzene, toluene etc..Preparation method of the present invention is simple, and raw material is cheap and easy to get, is advantageous to extensive
Industrial production, possess significant economy and social effect.
Claims (9)
1. the photoreactivation catalyst for indoor pollutant of degrading, it is characterised in that its chemical formula is Au-TiO2/NaOH。
2. as claimed in claim 1 degraded indoor pollutant photoreactivation catalyst preparation method, it is characterised in that including with
Lower step：
1) nano titanium oxide is put into container, adds distilled water in a reservoir, stirred, form white suspension；
2) NaOH is added in the white suspension that step 1) obtains, stirred, washed, centrifuged, dried, calcining, obtain composite catalyzing
Agent TiO2/NaOH；
3) Au is supported on composite catalyst TiO using photoreduction met hod2On/NaOH, the photoreactivation for producing degraded indoor pollutant is urged
Agent Au-TiO2/NaOH。
3. the preparation method of the photoreactivation catalyst of degraded indoor pollutant as claimed in claim 2, it is characterised in that in step
1) in, the time of the stirring is 0.5~24h.
4. the preparation method of the photoreactivation catalyst of degraded indoor pollutant as claimed in claim 2, it is characterised in that in step
2) in, the condition of the calcining is 200~400 DEG C of 0.5~2h of calcining in Muffle furnace.
5. the preparation method of the photoreactivation catalyst of degraded indoor pollutant as claimed in claim 2, it is characterised in that in step
2) in, the stirring is that 0.5~24h is kept stirring under conditions of ultra violet lamp.
6. the preparation method of the photoreactivation catalyst of degraded indoor pollutant as claimed in claim 2, it is characterised in that in step
3) in, the predecessor of Au load is gold chloride, or other golden solubility salts.
7. the preparation method of the photoreactivation catalyst of degraded indoor pollutant as claimed in claim 2, it is characterised in that described
NaOH uses other strong base substances.
8. the photoreactivation catalyst of degraded indoor pollutant is applied under light conditions indoors as claimed in claim 1.
9. application as claimed in claim 8, it is characterised in that the purification for gas phase indoor air pollutants.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710793492.8A CN107349931A (en) | 2017-09-06 | 2017-09-06 | Photoreactivation catalyst of degraded indoor pollutant and preparation method thereof |
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| CN201710793492.8A CN107349931A (en) | 2017-09-06 | 2017-09-06 | Photoreactivation catalyst of degraded indoor pollutant and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109621948A (en) * | 2019-01-23 | 2019-04-16 | 深圳市至霸化工有限公司 | One kind having weak light-catalysed nano-titanium dioxide and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621948A (en) * | 2019-01-23 | 2019-04-16 | 深圳市至霸化工有限公司 | One kind having weak light-catalysed nano-titanium dioxide and preparation method thereof |
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Application publication date: 20171117 |