CN114433032A - Bionic nano deodorant, preparation method and application - Google Patents
Bionic nano deodorant, preparation method and application Download PDFInfo
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- CN114433032A CN114433032A CN202210120052.7A CN202210120052A CN114433032A CN 114433032 A CN114433032 A CN 114433032A CN 202210120052 A CN202210120052 A CN 202210120052A CN 114433032 A CN114433032 A CN 114433032A
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- deodorant
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- nano deodorant
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- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
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- B01J35/39—
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- 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
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- 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
Abstract
The invention discloses a bionic nano deodorant, a preparation method and application. The prepared bionic nano deodorant mainly comprises bionic templated TiO2、MnO2Grape seed extract and ethanol. Templated preparation of TiO2The photocatalyst has better photocatalysis due to smaller size, more pores and narrower pore diameter caused by space restriction effectAnd (4) activity. MnO (MnO)2Very strong catalytic property and TiO2And the combined action shows more excellent adsorption performance. The grape seed extract has rich flavonoid and polyphenol substances, and can perform sulfur capture reaction with odorous gas molecules such as sulfide, so that the grape seed extract has a good odor removing effect. The bionic nano deodorant prepared by the invention has good odor removing effect, long retention time, environmental protection and safety, and has certain market popularization value.
Description
Technical Field
The invention relates to the technical field of a deodorant and a preparation method thereof, in particular to a bionic nano deodorant, a preparation method and application thereof.
Background
With the rapid development of domestic economy, the living standard of people is continuously improved, but the environmental air quality of people is continuously reduced, the severe air pollution condition is generated, and people are pollutedRespiration and physical health are associated with serious consequences. The main pollution source is soot type pollution, a large amount of fine particle dust is suspended in the air, the concentration ratio of sulfide generated in industrial production and nitrogen oxide discharged by automobiles is rising year by year, and the pollution degree is becoming serious. Currently, people pay more and more attention to the quality of living environment and physical health, air pollution prevention and improvement of the quality of ambient air are one of hot topics in society. In order to cope with indoor air pollution which may be caused by decoration pollution and urban air pollution, air purification is one of the hot spots of the current research. Harmful particles in indoor air come from many aspects, and in daily activities, a large amount of harmful particles such as dust, bacteria, viruses, molds, pollen, second-hand smoke, automobile exhaust and the like are generated due to human metabolism or ambient environmental factors. The types of pollutants in indoor air are mainly classified into three main types: physical contamination (particulates, dust, pollen, animal dander, etc.), biological contamination (bacteria, viruses, mold spores, etc.), and chemical contamination (NO)X、SOXAnd volatile organic compounds, etc.).
Air pollution is a problem in many developing countries, and it is understood that more people die worldwide from air pollution than from aids, malaria, breast cancer or tuberculosis. Harmful gases in the air are particularly harmful to human health. In 2012, china passed the environmental air quality standard and began to establish a national air quality reporting system, focusing on six pollutants in the air: less than 2.5 microns, less than 10 microns, sulfur dioxide, nitrogen dioxide, ozone and carbon monoxide.
It is worth noting that exceeding of harmful gas in an automobile is more harmful to human bodies than exceeding of harmful gas in a house. The reason for this is that: with the large increase of the demand of the market for the sedan, a lot of automobiles enter the market directly after leaving the production line, in the production process of the automobiles, a large amount of high-performance adhesive substances are generally used for splicing and fixing the interior trim materials of the automobiles, the high-performance adhesive substances visible on the market are mostly formed by adding diluting substances into high-molecular polymer materials, the diluting substances contain higher formaldehyde and volatile organic compounds such as aldehyde ketone and the like, along with the increase of time, the volatile other compounds such as the formaldehyde and the like are continuously volatilized outwards from the interior trim materials of the automobiles, so that the interior trim materials are continuously sucked into the bodies of the automobiles, various harmful gases emitted from accessories and the materials are not subjected to an effective release period, if plastic parts, carpets, roofs, felts, sofas and the like in the automobiles are not installed according to the environmental protection requirement, the emission amount of the harmful substances in the automobiles can be further increased, and the interior space of the automobiles is limited, generally, the window of the automobile is closed for a long time, and the air in the automobile is difficult to convect. Besides the harmful gases volatilized from air pollution and automobiles, the harmful gases generated by benzene and the like and the ammonia gas, hydrogen sulfide, sulfur dioxide and the like which can generate peculiar smell threaten the human health.
Formaldehyde is a transparent gas with an obvious pungent odor, and is widely applied to chemical production in industrial production. Formaldehyde can not only cause the denaturation of human protein, but also further cause chronic poisoning, has great damage to the nervous system, and is also a high carcinogen. At present, formaldehyde is widely applied to furniture production, thereby causing great harm to the health of people. The main harm of formaldehyde is represented by the stimulation effect on skin mucosa, and formaldehyde is a raw pulp toxic substance, can be combined with protein, and causes severe respiratory tract stimulation, edema, eye stimulation and headache when being inhaled at high concentration. The skin directly contacts with formaldehyde to cause allergic dermatitis, mottle, and necrosis, and bronchial asthma can be induced when high concentration formaldehyde is inhaled. High concentrations of formaldehyde are also a genotoxic substance. The experimental animal can cause nasopharyngeal tumor under the condition of high concentration inhalation in a laboratory. After being inhaled into the lung, ammonia gas easily enters the blood through alveoli and is combined with hemoglobin to destroy the oxygen transport function. Tearing, pharyngalgia, hoarseness, cough, phlegm with blood streak, chest distress and dyspnea can occur after a large amount of ammonia gas is absorbed in a short period, and dizziness, headache, nausea, vomiting, hypodynamia and the like can be accompanied, and patients with severe symptoms can generate pulmonary edema and adult respiratory distress syndrome and respiratory tract irritation symptoms at the same time. Ammonia is a colorless and strongly irritating odor gas that is lighter than air (specific gravity of 0.5) and is perceived at a minimum concentration of 5.3 ppm. Ammonia is an alkaline substance that has corrosive and irritating effects on contacting skin tissue. Can absorb water in skin tissue, denature tissue protein, saponify tissue fat, and destroy cell membrane structure. The solubility of ammonia is very high, so that it has the action of stimulating and corroding upper respiratory tract of animal or human body, and can reduce resistance of human body to disease. Hydrogen sulfide is extremely toxic to human bodies, mainly has the stimulation effect on eyes and respiratory mucosa at low concentration, and can cause chemical inflammation and pulmonary edema. The hydrogen sulfide has strong affinity with alkali metal ions of enzyme and protein containing sulfydryl, so that the activity of cytochrome oxidase, succinate dehydrogenase and ATPase is inhibited and reduced glutathione is exhausted, the processes of intracellular respiration and biological oxidation are blocked, and cells are anoxic.
The odorants developed for these harmful gases at present are mainly the following: (1) physical deodorants, which are deodorants deodorized by physical means, utilize the physical properties of the deodorants or odorous gases without changing the gas components, but only in their local concentrations, or in relative concentrations. Adsorption of the odor eliminating agent, masking of the odor eliminating agent, and the like are common. (2) The chemical deodorant is characterized in that the generated peculiar smell substances are changed into peculiar smell-free substances by oxidation, reductive decomposition, neutralization reaction, addition reaction, condensation reaction, ion exchange reaction and the like, so that peculiar smell is eliminated. (3) The microbial deodorant is a process of absorbing peculiar smell substances in dissolved water into microbes by using the microbes and degrading the peculiar smell substances through the metabolic activity of the microbes. Microbial deodorization can be divided into three stages: firstly, the dissolving process of the odor gas, namely, the odor gas is transferred from a gas phase to a liquid phase; secondly, peculiar smell components in the water solution are adsorbed and absorbed by microorganisms; and thirdly, the peculiar smell components entering the microbial cells are used as nutrient substances to be decomposed and utilized by the microbes, so that pollutants are removed.
Patent CN 110090626A discloses a protein nano deodorant and a preparation method thereof, which is characterized by comprising the following components in parts by weight: 15-25 parts of purified water, 1.5-2.5 parts of protein nano-gel, 15-25 parts of alkali liquor and 5-15 parts of disinfectant, wherein the hydrophilic protein nano-particles with the diameter of 1-100 nanometers are used, and the factors of stable hydrophilicity are as follows: the surface of the protein nano particle is mostly provided with hydrophilic groups, so that hydrophilic odor gas such as hydrogen sulfide, ammonia and the like can be absorbed, a layer of hydrated film is formed on the surface of the protein nano particle, thereby blocking mutual aggregation and penetration of other odor molecules, the surface of the protein nano particle can be provided with charges, and the problems that when the odor removing agent is used, the odor removing agent simply absorbs the odor molecules through pores on the surface of a porous medium, the volume of the porous medium is limited, the adsorption saturation is easy to achieve, the saturated porous medium can cause secondary pollution, and the odor removing efficiency and the environmental protection of the odor removing agent are influenced are solved.
Patent CN 109499339A discloses an indoor air deodorant, which is characterized by comprising the following materials in parts by weight: 0.1-0.5 part of amino acid functionalized graphene oxide, 2-6 parts of sodium percarbonate, 0.03-0.05 part of citric acid, 5-10 parts of nano titanium dioxide and 70-90 parts of deionized water. The beneficial effects of the invention are: the deodorant can be formed into a film by simple spraying, plays the role of a deodorant, does not need to be smeared, and is convenient to use; citric acid increases the film forming effect, and is beneficial to film forming and foreign matter degradation; all the components form a synergistic effect, foreign matters adsorbed into the deodorant holes can be concentrated, condensed and oxidized, the foreign matters are degraded, peculiar smell disappears, and foreign matters causing the peculiar smell indoors are fundamentally removed.
Although the technology of the deodorant in the prior art is updated and iterated, for example, most of chemical deodorants abandon organic matters which may have side effects on human bodies, and adopt nano particles such as nano titanium dioxide and the like as main adsorbents, the adoption of nano titanium dioxide as a photocatalyst has certain disadvantages: the ideal purification effect is only achieved in the 254nm or 365nm wavelength range of the ultraviolet light. And in the household, the general part of rooms is difficult to collect light, and no sunlight exists at night. But the organic pollutants in the indoor decoration materials and furniture can be released continuously, and the purification effect of treating indoor pollution by a common photocatalysis method is not obvious. The biological deodorant has the defects of narrow adsorption range, such as only adsorbing water-soluble gas, and the like. Therefore, the development of the deodorant which has good deodorizing effect, long retention time and environmental protection and safety and the preparation method thereof have certain popularization significance.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to solve the technical problem of preparing the deodorant which has good deodorizing effect, long retention time, environmental protection and safety.
The technical scheme of the invention is as follows:
a preparation method of a bionic nano deodorant comprises the following steps:
s1, soaking poplar wood in water, heating and soaking for 3-6 hours, taking out the wood, drying for 6-8 hours, adding absolute ethyl alcohol and ammonia water, soaking for 2-4 hours, and taking out to obtain pretreated poplar wood;
s2 dissolving butyl titanate in absolute ethyl alcohol, marking as solution X, mixing absolute ethyl alcohol, water and glacial acetic acid, and marking as solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X in the step S2, sealing and ultrasonically treating the poplar wood for 4-6 hours, then dropwise adding the solution Y in the step S2 while stirring, controlling the rotating speed to be 400-500 rpm, and ultrasonically treating the poplar wood for 4-6 hours after the dropwise adding is finished;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying and calcining to obtain the bionic templated titanium dioxide;
s5 template bionic TiO2、MnO2And mixing the grape seed extract with ethanol to obtain the bionic nano deodorant.
Preferably, the preparation of the bionic nano deodorant comprises the following steps:
s1, soaking 10-15 parts by weight of poplar wood in 100-200 parts by weight of water, heating to 50-60 ℃, soaking for 3-6 hours, taking out the wood, drying at 60-80 ℃ for 6-8 hours, adding 100-200 parts by weight of absolute ethyl alcohol and 2-5 parts by weight of ammonia water, soaking for 2-4 hours, and taking out to obtain pretreated poplar wood;
s2, weighing 5-10 parts by weight of butyl titanate, dissolving the butyl titanate in 10-20 parts by weight of absolute ethyl alcohol, marking as a solution X, weighing 5-10 parts by weight of absolute ethyl alcohol, mixing the absolute ethyl alcohol with 5-10 parts by weight of water and 5-10 parts by weight of glacial acetic acid, and marking as a solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X obtained in the step S2, sealing the solution X, performing ultrasonic treatment at the frequency of 40-45 kHz and 400-450W for 4-6 hours, then dropwise adding the solution Y in the step S2 at the speed of 4-5 mL/min, stirring while dropwise adding, controlling the rotating speed at 400-500 rpm, and performing ultrasonic treatment at the frequency of 40-45 kHz and 400-450W for 4-6 hours after dropwise adding;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying the wood at the temperature of 60-80 ℃ for 2-4 h, and calcining the wood at the temperature of 300-500 ℃ for 1-2 h to obtain the bionic templated TiO2；
S5 template TiO bionic25 to 10 parts by weight of MnO22-5 parts by weight of grape seed extract, 3-5 parts by weight of grape seed extract and 20-50 parts by weight of ethanol are mixed to obtain the bionic nano deodorant.
Compared with the prior art, the invention has the beneficial effects that:
(1) in the invention, the pore structure of the natural wood is introduced into the nano TiO by a biological template synthesis method2In the structure of (1), a templated preparation of TiO2Because of the space-limiting effect, the size is smaller, and the anatase phase TiO is more prone to be generated by high-temperature calcination2The photocatalyst is more porous and has narrower pore diameter, so that the photocatalyst has better photocatalytic activity, and the adsorption effect of the deodorant is improved;
(2) templated TiO2Has a porous structure capable of improving MnO2MnO-a defect that the aggregation phenomenon easily occurs due to the low specific surface area2Strong catalytic activity with TiO2The adsorption performance is more excellent under the combined action;
(3) the grape seed extract added in the invention has rich flavonoid and polyphenol substances, and can generate sulfur capture reaction with odor gas molecules such as sulfide, so the grape seed extract has good odor removing effect.
The invention also provides a bionic nano deodorant prepared by the method.
The specific method for applying the bionic nano deodorant in the field of air purification comprises the following steps: the bionic nano deodorant is sprayed on the surfaces of objects such as decorated houses, toilets, vehicles or cloth crafts which generate peculiar smell. By adopting the method, the application of the bionic nano deodorant can be realized, and the use is convenient. In addition, if the bionic nano deodorant is not strongly wiped by the outside, the smell can be removed all the time, and the effect is durable.
Detailed Description
Hereinafter, the technical solution of the present invention will be described in detail by specific examples, but these examples should be explicitly proposed for illustration, but should not be construed as limiting the scope of the present invention.
The parameters of part of the raw materials in the embodiment of the invention are as follows:
poplar wood, apparent density 0.42g/m3Purchased from Taicang Wood processing factories.
Butyl titanate, CAS number: 5593-70-4 from alatin.
Glacial acetic acid, CAS No.: 64-19-7, available from alatin.
Grape seed extract, the content is more than or equal to 10%, purchased from: exemplary Biotechnology, Inc., Guangzhou.
Nano TiO 22The model is as follows: p25, available from: shanghai Kayin chemical industry.
NaY molecular sieve, silica to alumina ratio (mole ratio): 5.2, purchased from Tianyi New materials Co., Ltd, Hunan province.
MnO2CAS number: 1313-13-9 from alatin.
MnSO4·H2O, CAS number: 10034-96-5, available from Aladdin.
Comparative example 1
The preparation method of the bionic nano deodorant comprises the following steps:
s1 mixing nano TiO2 50g、MnO220g of grape seed extract, 30g of grape seed extract and 300mL of absolute ethyl alcohol are mixed to obtain the bionic nano deodorant.
Example 1
The preparation method of the bionic nano deodorant comprises the following steps:
s1, soaking 150g of poplar wood with the size of 5cm multiplied by 2cm multiplied by 1cm in 1500mL of water, heating to 50 ℃, soaking for 3h, taking out the wood, drying at 80 ℃ for 6h, adding 1200mL of absolute ethyl alcohol, soaking in 25mL of ammonia water for 4h, and taking out to obtain pretreated poplar wood;
s2, weighing 50g of butyl titanate, dissolving the butyl titanate in 150mL of absolute ethyl alcohol, marking as a solution X, weighing 50g of absolute ethyl alcohol, mixing the absolute ethyl alcohol with 50g of water and 50g of glacial acetic acid, and marking as a solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X in the step S2, sealing the solution X, performing ultrasonic treatment at 40kHz and 400W for 4 hours, then dropwise adding the solution Y in the step S2 at a speed of 4mL/min, stirring while dropwise adding, controlling the rotation speed at 400rpm, and performing ultrasonic treatment at 40kHz and 400W for 6 hours after dropwise adding;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying the wood at 80 ℃ for 4h, and calcining the wood at 400 ℃ for 2h to obtain the bionic templated TiO2；
S5 template TiO bionic2 50g、MnO220g of grape seed extract, 30g of grape seed extract and 300mL of ethanol are mixed to obtain the bionic nano deodorant.
Example 2
The preparation method of the bionic nano deodorant comprises the following steps:
s1, soaking 150g of poplar wood with the size of 5cm multiplied by 2cm multiplied by 1cm in 1500mL of water, heating to 50 ℃, soaking for 3h, taking out the wood, drying at 80 ℃ for 6h, adding 1200mL of absolute ethyl alcohol, soaking in 25mL of ammonia water for 4h, and taking out to obtain pretreated poplar wood;
s2, weighing 50g of butyl titanate, dissolving the butyl titanate in 150mL of absolute ethyl alcohol, marking as a solution X, weighing 50g of absolute ethyl alcohol, mixing the absolute ethyl alcohol with 50g of water and 50g of glacial acetic acid, and marking as a solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X in the step S2, sealing the solution X, performing ultrasonic treatment at 40kHz and 400W for 4 hours, then dropwise adding the solution Y in the step S2 at a speed of 4mL/min, stirring while dropwise adding, controlling the rotation speed at 400rpm, and performing ultrasonic treatment at 40kHz and 400W for 6 hours after dropwise adding;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying the wood at 80 ℃ for 4h, and calcining the wood at 400 ℃ for 2h to obtain the bionic templated TiO2；
S5 template TiO bionic2Mixing 50g of grape seed extract and 30g of 300mL of ethanol to obtain the bionic nano deodorant.
Example 3
The preparation method of the bionic nano deodorant comprises the following steps:
s1, soaking 150g of poplar wood with the size of 5cm multiplied by 2cm multiplied by 1cm in 1500mL of water, heating to 50 ℃, soaking for 3h, taking out the wood, drying at 80 ℃ for 6h, adding 1200mL of absolute ethyl alcohol, soaking in 25mL of ammonia water for 4h, and taking out to obtain pretreated poplar wood;
s2, weighing 50g of butyl titanate, dissolving the butyl titanate in 150mL of absolute ethyl alcohol, marking as a solution X, weighing 50g of absolute ethyl alcohol, mixing the absolute ethyl alcohol with 50g of water and 50g of glacial acetic acid, and marking as a solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X in the step S2, sealing the solution X, performing ultrasonic treatment at 40kHz and 400W for 4 hours, then dropwise adding the solution Y in the step S2 at a speed of 4mL/min, stirring while dropwise adding, controlling the rotation speed at 400rpm, and performing ultrasonic treatment at 40kHz and 400W for 6 hours after dropwise adding;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying the wood at 80 ℃ for 4h, and calcining the wood at 400 ℃ for 2h to obtain the bionic templated TiO2；
S5 weighing NaY molecular sieve 10g, MnO230g was added to 1000mL of water, and MnSO was added4·H2O55 g to obtain a mixed solution, and after the addition is finished, 35g of KMnO is weighed4Dissolving in 600mL of water, dropwise adding into the mixed solution, performing ultrasonic treatment at 40kHz and 400W for 1h, adding 7.5g of NaOH, heating to 60 ℃, and stirring for 2 h;
s6 centrifuging the reaction solution stirred in the step S5 at 4000rpm, washing the lower layer solid with 500mL of water, drying at 80 ℃ for 2h, and heating at 500 ℃ for 2h to obtain NaY/MnO2A nanocomposite;
s7 template TiO bionic2 50g、NaY/MnO2And mixing 20g of the nano composite material, 30g of the grape seed extract and 300mL of ethanol to obtain the bionic nano deodorant.
Example 4
The preparation method of the bionic nano deodorant comprises the following steps:
s1, soaking 150g of poplar wood with the size of 5cm multiplied by 2cm multiplied by 1cm in 1500mL of water, heating to 50 ℃, soaking for 3h, taking out the wood, drying at 80 ℃ for 6h, adding 1200mL of absolute ethyl alcohol, soaking in 25mL of ammonia water for 4h, and taking out to obtain pretreated poplar wood;
s2, weighing 50g of butyl titanate, dissolving the butyl titanate in 150mL of absolute ethyl alcohol, marking as a solution X, weighing 50g of absolute ethyl alcohol, mixing the absolute ethyl alcohol with 50g of water and 50g of glacial acetic acid, and marking as a solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X in the step S2, sealing the solution X, performing ultrasonic treatment at 40kHz and 400W for 4 hours, then dropwise adding the solution Y in the step S2 at a speed of 4mL/min, stirring while dropwise adding, controlling the rotation speed at 400rpm, and performing ultrasonic treatment at 40kHz and 400W for 6 hours after dropwise adding;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying the wood at 80 ℃ for 4h, and calcining the wood at 400 ℃ for 2h to obtain the bionic templated TiO2；
S5 template TiO bionic2 50g、MnO220g of mint extract, 30g of mint extract and 300mL of absolute ethyl alcohol are mixed to obtain the bionic nano deodorant.
Test example 1
The adsorption experiment is carried out on harmful gases generated in decoration such as formaldehyde removal in the comparative example and the embodiment, formaldehyde, benzene and TVOC solutions with the same concentration are respectively sprayed in a sealed room of one cubic meter, a decorated room is simulated, the concentration of the harmful gases in the room is tested, and then the samples are mixed according to the following ratio: diluting with water at a ratio of 1:50, spraying into a room, taking out after 24 hours, and testing the concentration of harmful gas in the room again. The adsorption rate for harmful gas was calculated from the gas concentration using (pre-adsorption concentration-post-adsorption concentration)/pre-adsorption concentration 100%. And compared with the limit values specified in the national standard GB50325 for formaldehyde, benzene and TVOC.
Table 1 table of adsorption experiment results of harmful gas
According to the adsorption results in table 1, examples 1, 3 and 4 have better adsorption effect on three common harmful gases, namely formaldehyde, benzene and TVOC, than comparative examples 1 and 2, which is probably due to the fact that examples 1, 3 and 4 all adopt biomimetic templated TiO as compared with comparative example 12With TiO not templated2In contrast, TiO in wood forms2Because the binding energy of Ti ions is changed, more oxygen vacancies exist, the photocatalytic activity is improved, and the multi-scale pore structure is more favorable for capturing formaldehyde. Example 1 differs from comparative example 1 in that the templated TiO2Has a more porous structure and can improve MnO2MnO-a defect that the aggregation phenomenon easily occurs due to the low specific surface area2Very strong catalytic property and TiO2And thus can exhibit more excellent adsorption performance. NaY/MnO used in example 32Nanocomposite material compared to MnO in example 12The adsorption rate of formaldehyde is higher because the coupling effect of the NaY molecular sieve combines the catalytic performance and the adsorption performance of the NaY molecular sieve, and the high specific surface area of the NaY molecular sieve can gather the formaldehyde on the surface of the NaY molecular sieve and then move the NaY molecular sieve to MnO through diffusion2The surface is degraded, and the adsorption performance is further enhanced.
Test example 2
The odor removal test was performed on the control examples and the examples, and the adsorption test was performed on the odor gas common to the home, including: ammonia, hydrogen sulfide, sulfur dioxide, adopt the mode of configuring peculiar smell gas into solution to spray in sealed room equally, place such as the bathroom of peculiar smell appears in the simulation, peculiar smell gas concentration in the test room, according to the sample again: water was diluted 1:50, sprayed into the room, taken out after 24 hours, and the room was again tested for gas concentration.
Table 2 table of the results of the odor adsorption experiment
According to the results in table 2 regarding the adsorption of the odorous gases including ammonia, hydrogen sulfide and sulfur dioxide, which are common in life, the odor removing effect of the odor removing agent prepared in example 4 is inferior to that of the odor removing agents prepared in other examples, because the main effect of the mint extract is to drive off the odor through cool fragrance, and thus the odor removing effect is inferior. The grape seed extract contains a large amount of flavonoids and polyphenols, and the structural hydroxyl can react with sulfides to degrade the sulfides, so that the effect of removing the peculiar smell is achieved.
Test example 3
Researches show that the VOC volatilization amount of textiles, leather, adhesives, sealants and the like used in the automobile is high, and the VOC volatilization amount is directly related to the phenolic resin serving as a bonding material used in the manufacturing process of the adhesive. The modified polypropylene (PP) material for manufacturing the automotive interior material meets corresponding requirements on use performance in all aspects, but Volatile Organic Compounds (VOC) and certain odor can be generated in the use process to influence the body health of people. Therefore, odor removal and adsorption of harmful gases in the automobile interior are also important concerns. The odor removal agents prepared in the comparative examples and examples were subjected to automobile odor removal and adsorption experiments, a batch of new automobiles were divided into 5 groups for odor removal treatment, 10 automobiles in each group, and the samples were subjected to the following treatments: diluting the water in a ratio of 1:50, spraying the diluted water into a room to deodorize the interior of the automobile, sealing the room for 12 hours, detecting the quality of air in the automobile, and averaging the results. The detection limit is described in the request for concentration of volatile organic compounds in air in a vehicle (survey).
TABLE 3 odor removal and adsorption test results table for the interior of the automobile
As can be seen from the odor removal and adsorption results in Table 3, examples 1, 3 and 4 have better adsorption effects on formaldehyde and benzene than comparative example 1 and example 2, which is probably due to the introduction of the pore structure of natural wood into nano TiO by the biomatesynthesis method in these examples2In the structure of (1), a templated preparation of TiO2Due to the space-limiting effect, the anatase phase tends to be formed more easily by high-temperature calcination, and the TiO in the anatase phase2More porous and narrower pore size, thus better photocatalytic activity, which will also enhance the adsorption of the odor removal agent, templated TiO in example 32Has a porous structure capable of improving MnO2MnO-a defect that the aggregation phenomenon easily occurs due to the low specific surface area2Very strong catalytic property and TiO2And by the combined action, more excellent adsorption performance can be shown. The added grape seed extract has rich flavonoid and polyphenol substances, and can perform sulfur capture reaction with odor gas molecules such as sulfide, so that the added grape seed extract has good odor removing effect.
Claims (10)
1. A preparation method of a bionic nano deodorant is characterized by comprising the following steps:
s1, soaking poplar wood in water, heating and soaking for 3-6 hours, taking out the wood, drying for 6-8 hours, adding absolute ethyl alcohol and ammonia water, soaking for 2-4 hours, and taking out to obtain pretreated poplar wood;
s2 dissolving butyl titanate in absolute ethyl alcohol, marking as solution X, mixing absolute ethyl alcohol, water and glacial acetic acid, and marking as solution Y;
s3, soaking the poplar wood pretreated in the step S1 in the solution X in the step S2, sealing and ultrasonically treating the poplar wood for 4-6 hours, then dropwise adding the solution Y in the step S2 while stirring, controlling the rotating speed to be 400-500 rpm, and ultrasonically treating the poplar wood for 4-6 hours after the dropwise adding is finished;
s4, taking out the wood subjected to the ultrasonic treatment in the step S3, drying, and calcining to obtain the bionic templated titanium dioxide;
s5 template TiO bionic2、MnO2And mixing the grape seed extract with ethanol to obtain the bionic nano deodorant.
2. The method of claim 1 for preparing a biomimetic nano deodorant, wherein: in the step S1, the temperature for heating and soaking in water is 50-60 ℃, and the drying temperature is 60-80 ℃.
3. The method of claim 1 for preparing a biomimetic nano deodorant, wherein: in the solution X in the step S2, the butyl titanate is 5-10 parts by weight, and the absolute ethyl alcohol is 10-20 parts by weight.
4. The method of claim 1 for preparing a biomimetic nano deodorant, wherein: in the solution Y obtained in the step S2, the weight parts of absolute ethyl alcohol, water and glacial acetic acid are respectively 5-10 parts, 5-10 parts and 5-10 parts.
5. The method of claim 1 for preparing a biomimetic nano deodorant, characterized in that: and the dropping speed of the dropwise solution Y in the step S3 is 4-5 mL/min.
6. The method of claim 1 for preparing a biomimetic nano deodorant, wherein: the drying temperature in the step S4 is 60-80 ℃, and the calcining temperature is 400-500 ℃.
7. The method of claim 1 for preparing a biomimetic nano deodorant, wherein: the drying time in the step S4 is 2-4 h, and the calcining time is 1-2 h.
8. The method of claim 1, wherein the bionic nano deodorant comprises: step S5 biomimetic templated TiO2、MnO2The mass ratio of the grape seed extract to the ethanol is (5-10): (2-5): (3-5): (20 to 50).
9. A bionic nano deodorant, which is prepared by the method of any one of claims 1-8.
10. Use of the biomimetic nano deodorant according to claim 9 in air purification.
Priority Applications (1)
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