CN107596911A - A kind of method using atmosphere organic pollutants such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde - Google Patents
A kind of method using atmosphere organic pollutants such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde Download PDFInfo
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- CN107596911A CN107596911A CN201711006786.8A CN201711006786A CN107596911A CN 107596911 A CN107596911 A CN 107596911A CN 201711006786 A CN201711006786 A CN 201711006786A CN 107596911 A CN107596911 A CN 107596911A
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Abstract
The invention discloses a kind of method using atmosphere organic pollutants such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde, its content of the invention includes：Catalyst is prepared, establishes the experimental method of the atmosphere organic pollutants such as thermocatalytic degradation of formaldehyde and the evaluation method of thermocatalytic degradation efficiency.The invention has the characteristics that：The metal-doped titanium deoxide catalyst prepared has stability good, the efficiency high of the atmosphere organic pollutant such as degradation of formaldehyde under heating condition；The implementation of this method is to carry out at a certain temperature in the closed glass reactor of (45~65 DEG C) no light, have the advantages that technique is simple, low, the easily operated and degradation efficiency of appointed condition requirement is high, and trace meter need to be only adulterated, is suitable for actual application.The present invention will provide new approach to administer air pollution particularly room air pollution and its development and application.
Description
【Technical field】
The invention discloses one kind to utilize the organic dirts of air such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde
The method of thing is contaminated, this method appointed condition requires low, simple to operate and is easy to practical application, organic for air such as degradation of formaldehyde
Pollutant has higher efficiency.The invention belongs to science and technology field of curbing environmental pollution, and is provided for control atmosphere pollution
A kind of new easy method.
【Background technology】
At present, atmosphere pollution at every moment endangers the health of people, with the improvement of living standards, spruce up or
Indoor pollution caused by buying new furniture, the common concern of people is obtained, indoor pollution pollutant main is first
Aldehyde, formaldehyde have causing toxicity.Scientific investigations showed that the short-term inhaled formaldehyde of people can cause furious, eye to be itched, throat discomfort etc. is a variety of
Adverse reaction, and for a long time in content of formaldehyde more than 30mg/m3Interior, various diseases such as skin disease and cancer can be triggered.
Generally the acquisition time of formaldehyde is longer, up to as long as 3-10.Therefore, how to eliminate Formaldehyde Pollution of Indoor Air and be one and concern
The big problem of whole mankind's health.
The invention discloses one kind to utilize the organic dirts of air such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde
Contaminate the method for thing.This method is to utilize the metal-doped titanium deoxide catalyst developed thermocatalytic under no light cryogenic conditions
Organic contamination in the air such as degradation of formaldehyde, its organic contamination is changed into free of contamination carbon dioxide and water.This method cost
Low, efficiency high, remove thoroughly, and condition requirement is simple, has for control atmosphere pollution particularly indoor pollution extensive
Application prospect.At present, report, the party are had no using the research work of metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde
Method will open up new direction for control atmosphere pollution.
【The content of the invention】
The invention discloses one kind to utilize the atmosphere organic pollutants such as metal-doped titanium deoxide catalyst thermal degradation formaldehyde
Method, its content of the invention includes following aspect：1. metal is prepared using sol-gel process, coprecipitation and hydro-thermal method etc.
Doping titanium dioxide catalyst.2. establish the experiment in atmosphere organic pollutants such as thermocatalytic degradation of formaldehyde using the catalyst
The evaluation method of method and thermocatalytic efficiency.3. it is big to carry out thermocatalytic degradation of formaldehyde etc. using metal-doped titanium deoxide catalyst
The experiment of gas organic pollution.As a result show：Metal-doped titanium deoxide catalyst is under the conditions of (65 DEG C) are heated for formaldehyde
Thermocatalytic degraded Deng atmosphere organic pollutant has higher efficiency；Experimental method technique is simple, implementation condition requires low, easily
In operation；And the evaluation method of thermocatalytic efficiency is accurately feasible.
The specific method of the present invention is as follows：
1. the preparation of metal-doped titanium deoxide catalyst
Using technologies such as sol-gel process, coprecipitations, metal-doped titanium deoxide catalyst is prepared.
2. the evaluation method of the atmosphere organic pollutant such as thermocatalytic degradation of formaldehyde experimental method and thermocatalytic efficiency
The experiment of thermocatalytic degradation of formaldehyde is that proper catalyst is being coated in surface (the area 7cm of glass slide
× 2cm), put it into reactor, degradation product (e.g., 20 μ L formaldehyde) is then injected into thermal reactor, will reaction after sealing
Device is placed in insulating box, is placed 30 minutes at room temperature, formaldehyde is gasified totally, and reach adsorption equilibrium in catalyst surface；
Then degradation temperature (e.g., 65 DEG C) is set.Start timing, every the reaction gas (0.4mL) that 2 hours extract, utilize gas-chromatography
Product (CO after the residual concentration of instrument measure formaldehyde and the degraded of formaldehyde thermocatalytic2) concentration, determine that catalyst thermo-catalytic formaldehyde drops
Solution rate.Carry out thermal degradation and the light degradation contrast experiment of catalyst respectively under the conditions of not driving xenon lamp or not heating.
For a better understanding of the present invention, the present invention is described in further detail with reference to embodiment, but this hair
Bright claimed scope is not limited to the scope represented by embodiment.
【Brief description of the drawings】
The XRD spectrum of sample in Fig. 1 Examples 1 and 2；
The XPS element collection of illustrative plates of sample in Fig. 2 Examples 1 and 2；
The thermocatalytic degradation of formaldehyde generation CO of sample in Fig. 3 Examples 1 and 22Activity figure；
The present invention is described further below in conjunction with specific embodiments and the drawings, and illustrates the thermocatalytic of the present invention
As a result.
【Embodiment】
Embodiment 1
TiO2- Pd preparation：Under room temperature condition, the dense HCl solutions of 1ml, a certain amount of PdCl2Solution with 40ml absolute ethyl alcohols
C2H5OH is sufficiently mixed, with vigorous stirring, by 12ml butyl titanate Ti (OC4H9)4It is slowly dropped in above-mentioned solution, is formed
Homogeneous phase solution.It is 3.5 or so to add a certain amount of deionized water (3ml) regulation PH, and lasting stirring is until forming TiO2Gel；Room
Lower ageing 24h, the 100 DEG C of dry 12h of temperature, by sample pulverize it is last move in crucible, 450 DEG C of high-temperature calcination 2.5h, obtain
TiO2- Pd samples.
Embodiment 2
TiO2- Pt preparation：Under room temperature condition, the dense HCl solutions of 1ml, a certain amount of H2PtCl6Solution with the anhydrous second of 40ml
Alcohol C2H5OH is sufficiently mixed, with vigorous stirring, by 12ml butyl titanate Ti (OC4H9)4It is slowly dropped in above-mentioned solution,
Form homogeneous phase solution.It is 3.5 or so to add a certain amount of deionized water (3ml) regulation PH, and lasting stirring is until forming TiO2It is solidifying
Glue；Be aged 24h, 100 DEG C of dry 12h at room temperature, by sample pulverize it is last move in crucible, 450 DEG C of high-temperature calcinations
2.5h, obtain TiO2- Pt samples.
Accompanying drawing is described briefly below：
Fig. 1 and Fig. 2 shows to be successfully prepared out TiO respectively2- Pd and TiO2- Pt catalyst, Pd elements and Pt elements are to change
Solvate form is present in TiO2Surface.
Fig. 3 shows pure TiO2Thermocatalytic degradation of formaldehyde generation CO2Activity it is very low, reaction 8h generation CO2Concentration is only
0.152×10-4mol·L-1.Under the same conditions, TiO2After the experiment of-Pd degradation of formaldehyde carries out 8h, CO in reactor2Concentration is
4.542×10-4mol·L-1, TiO2After the experiment of-Pt degradation of formaldehyde carries out 8h, CO in reactor2Concentration is 6.067 × 1O- 4mol·L-1, it is pure TiO respectively2CO under heating condition2Generate 30 and 40 times of concentration.
As can be seen that and Pure TiO from above example2Sample contrasts, in a heated condition TiO2- Pd samples and TiO2-Pt
The catalytic degradation formaldehyde generation CO of sample2Catalytic activity be greatly improved.
Claims (4)
1. a kind of method using atmosphere organic pollutants such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde, bag
Include：Prepare metal-doped titanium deoxide catalyst, establish the atmosphere organic pollutants such as thermocatalytic degradation of formaldehyde experimental method and
The evaluation method of thermocatalytic efficiency；Described metal-doped titanium deoxide catalyst be characterised by the catalyst stability it is good,
The efficiency high of the atmosphere organic pollutants such as thermocatalytic degradation of formaldehyde and applied widely；The organic dirt of the air such as thermocatalytic degradation of formaldehyde
The evaluation method of the experimental method and thermocatalytic efficiency that contaminate thing is characterised by the atmosphere organic pollutants such as thermocatalytic degradation of formaldehyde
Experiment be under the conditions of no light certain temperature (in closed glass reactor) carry out；Metal-doped titanium deoxide catalyst
Preparation：Using technologies such as sol-gel process, coprecipitations, metal-doped titanium deoxide catalyst is prepared；Catalytic degradation is real
Test process：Proper catalyst is coated in slide glass (such as：Glass slide) surface (area is 7cm × 2cm), put it into anti-
Answer in device, degradation product (e.g., 20 μ L formaldehyde) is then injected into thermal reactor, reactor is placed in insulating box after sealing,
Place 30 minutes at room temperature, formaldehyde is gasified totally, and reach adsorption equilibrium in catalyst surface；Then degradation temperature is set
(e.g., 65 DEG C), start timing, every the reaction gas (0.4mL) that 2 hours extract, utilize the residue of gas chromatograph for determination formaldehyde
Product (CO after concentration and the degraded of formaldehyde thermocatalytic2) concentration, catalyst thermo-catalytic Degradation Formaldehyde rate is determined, in identical bar
Pure titinium dioxide catalytic thermal degradation of formaldehyde contrast experiment is carried out under part.
2. one kind according to claim 1 has using air such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde
The method of organic pollutants, it is characterised in that described degradation temperature is 45~65 DEG C.
It is 3. according to claim 1 or 2 a kind of big using metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde etc.
The method of gas organic pollution, it is characterised in that described metal-doped titanium deoxide catalyst can be TiO2- Cu, TiO2-
In, TiO2- Au, TiO2- Pd or TiO2Any one of-Pt.
4. one kind according to claim 1 has using air such as metal-doped titanium deoxide catalyst thermocatalytic degradation of formaldehyde
The method of organic pollutants, it is characterised in that described atmosphere organic pollutant can be that formaldehyde, acetone, phenol and cresols etc. are organic
Any one of small molecule.
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Cited By (2)
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| CN109321016A (en) * | 2018-10-10 | 2019-02-12 | 广东顺德碧昂负离子新材料有限公司 | A kind of neutral anion liquid spray agent and preparation method thereof except formaldehyde and purifying air |
| CN110907587A (en) * | 2019-10-15 | 2020-03-24 | 山东工商学院 | Portable formaldehyde detector |
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