CN107737578B - Preparation method of anion antibacterial adsorption material composition - Google Patents
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Abstract
The invention provides a preparation method of an anion antibacterial adsorption material composition, which is characterized by comprising the following steps: (a) 13X molecular sieve raw powder accounting for 60-75% of the total mass of the composition, alkali metal oxide accounting for 10-20% of the total mass of the composition, and tourmaline powder accounting for 10-20% of the total mass of the composition, wherein the rest components are a binder and a pore-expanding agent, and are mixed according to a ratio to form mixed powder of a homogeneous system; (b) soaking the mixed powder into an aqueous solution of AgNO3, performing ultrasonic oscillation to form a suspension, and adding a NaOH solution to adjust the pH to 10 to form a mixed solution; (c) and sealing and heating the mixed solution under hydrothermal conditions, separating, sintering at high temperature, and crushing to obtain the composition. Compared with the prior art, the invention has the advantages of low preparation cost, adsorption capacity for indoor polluted gas, decomposition and desorption prevention performance, capability of releasing a certain amount of negative ions, promotion of adsorption effect and benefit for human bodies.
Description
Technical Field
The invention relates to an anion antibacterial adsorption material composition.
Background
The indoor air pollution phenomenon is widely existed in various closed buildings such as living rooms at present, and severe indoor air brings serious harm to human health. The world environment held in Washington in 1997 indicates that indoor air pollution is more severe than outdoor air pollution. The problem of indoor air pollution is highly regarded in many countries of the world, and research work on indoor environment quality has been conducted in europe, north america, japan, and the like from the 20 th century to the 80 th century.
According to a large number of research reports, toxic and harmful gases generated by indoor decoration, furniture and electric appliances are the main causes of most of cancers at present, modern people spend almost 80-90% of the time indoors, the quality of indoor air is concerned with the health of people, but the toxic and harmful gases unconsciously damage the health of people.
Indoor toxic and harmful gases include:
aldehydes (formaldehyde predominates): as a raw stock toxic substance, the product can be combined with protein to affect human health from the aspect of metabolism. Low concentrations of formaldehyde can cause respiratory and digestive diseases, while high concentrations of formaldehyde have a strong carcinogenic effect. Formaldehyde is easily dissolved in water and organic solvents, is easy to adhere to, and is easy to volatilize when the temperature is increased. Is one of carcinogenic toxic gases which are left on furniture and home furnishings for a long time and slowly volatilize;
benzene and toluene: benzene and toluene are the basic cause of leucocyte lesion and can cause chromosome lesion, and benzene and toluene belong to aromatic compounds, and benzene rings are particularly stable and are not easy to decompose in vivo, so that the body health is seriously affected. Benzene ring substances mainly come from indoor paint and coating;
radioactive radon gas: radioactive radon gas comes from building materials or building foundations, can continuously emit radioactive gas, and the too high concentration of the radioactive gas can cause cell canceration and gene mutation, thereby having particularly serious influence on pregnant women and infants;
ammonia nitrogen compound: the ammonia nitrogen compound in the room is mainly ammonia gas which can cause damage to a respiratory system and a mucosa system, and the ammonia gas in the room is mainly generated by building materials.
The CN201210408096.6 patent adopts zeolite, but the modification adopts fluorine-silicon treatment, which enhances the adsorption capacity of benzene and toluene, but does not obviously improve the adsorption performance of formaldehyde, radioactive radon gas and the like. Patent No. cn201110023219.x discloses a metal-organic framework material for adsorbing indoor pollution gas, which has relatively good adsorption performance on benzene, toluene, formaldehyde and the like, but has complex synthesis, high price and no general adaptability. The method in patent CN200910017520.2 is to mix several adsorbents with different substances according to a certain proportion to achieve the adsorption performance of adsorbing indoor polluted gas, and is not a novel adsorption material.
Compared with the prior art, the invention has the advantages of low price, simple preparation, adsorption capacity for indoor polluted gas, decomposition and desorption prevention performance, capability of releasing a certain amount of negative ions, promotion of adsorption effect and benefit for human bodies.
Disclosure of Invention
The invention aims to provide a synthetic preparation method of an adsorbing material which has stable performance, high adsorption rate, large adsorption capacity and stable decomposition aiming at indoor harmful gas, has the advantages of low price and simple preparation, has the adsorption capacity and decomposition and desorption prevention performance for indoor polluted gas, can release a certain amount of negative ions, promotes the adsorption effect and is beneficial to human bodies.
A preparation method of an anion antibacterial adsorption material composition is characterized by comprising the following steps:
(a) 13X molecular sieve raw powder accounting for 60-75% of the total mass of the composition, alkali metal oxide accounting for 10-20% of the total mass of the composition, and tourmaline powder accounting for 10-20% of the total mass of the composition, wherein the rest components are a binder and a pore-expanding agent which are mixed according to a ratio to form mixed powder of a homogeneous system;
(b) soaking the mixed powder into an aqueous solution of AgNO3, performing ultrasonic oscillation to form a suspension, and adding a NaOH solution to adjust the pH to 10 to form a mixed solution;
(c) and sealing and heating the mixed solution under hydrothermal conditions, separating, sintering at high temperature, and crushing to obtain the composition.
Wherein the sintering temperature is above 700 ℃. The purpose of high temperature is to further combine metal oxide, tourmaline powder and molecular sieve powder, thereby increasing the loading capacity and enhancing the adsorption capacity. Meanwhile, the pore-expanding agent and other residual substances in the molecular sieve powder can be decomposed, the diameter of the pore passage is increased, and the specific surface area is increased.
Wherein the alkali metal may comprise 80 wt.% calcium oxide, 10 wt.% aluminum oxide, 10 wt.% magnesium oxide. The alkali metal oxide has the function of providing enough hydroxyl groups, and after the alkali metal oxide is compounded with the molecular sieve, the alkali metal oxide can fully absorb harmful gas small molecules such as formaldehyde and the like which react with the hydroxyl groups based on the hydroxyl-rich structure.
Wherein the binder is a silica sol.
After NaOH is added, AgNO3 reacts with NaOH to form silver hydroxide sol, which is decomposed into nano silver oxide under hydrothermal condition and fully compounded with powder such as molecular sieve to form a nano silver oxide coating on the surface. The nano silver oxide can play an antibacterial role and kill harmful bacteria in the air. Meanwhile, after NaOH is added to adjust the pH value, the pore diameter of the molecular sieve can be further expanded, and the richness of the mixture comprising metal oxide and hydroxyl on the surface of the molecular sieve is increased, so that the formaldehyde adsorbed by the molecular sieve is further enhanced, and a certain synergistic effect is achieved.
Wherein the hydrothermal temperature is 200 ℃ and 300 ℃ and the time is 2-4 hours. The hydrothermal method aims to ensure that all substances are further mixed fully in the form of suspension and are mutually supported in an infiltration manner, so that the activity of all substances including tourmaline powder can be further enhanced, and silver hydroxide sol is decomposed into nano silver oxide.
Wherein the AgNO3 aqueous solution is a saturated solution.
The tourmaline powder has the function of generating negative ions beneficial to human bodies. Meanwhile, the tourmaline powder has a synergistic effect on the increase of the adsorption rate and the adsorption capacity. Meanwhile, experimental results show that the tourmaline powder also has a synergistic bactericidal effect with the nano silver oxide.
A method for purifying indoor air using the anion antibacterial adsorbent material composition prepared according to the above claim.
Detailed Description
Example 1
The synthesis method of the negative ion antibacterial adsorption material provided by the invention comprises the following specific steps:
1, fully mixing 75 parts by mass of raw powder of an X molecular sieve, 8 parts by mass of calcium oxide, 1 part by mass of aluminum oxide, 1 part by mass of magnesium oxide, 10 parts by mass of tourmaline, 3 parts by mass of silica sol as a binder and 2 parts by mass of sesbania powder as a pore-enlarging agent (wherein the sesbania powder is converted into carbon dioxide after being roasted and leaves a carrier).
2, adding the mixture into 500 parts by mass of AgNO3 saturated aqueous solution, fully stirring, carrying out ultrasonic oscillation to form suspension, putting the suspension into a high-temperature reaction kettle, adding NaOH to adjust the pH value to 10, and heating for 2 hours at 200 ℃ under a hydrothermal condition.
And 3, after centrifugally filtering the suspension obtained in the step 2, calcining at a high temperature of 700 ℃, and fully crushing by using a crusher to obtain the catalyst.
Comparative example 1
The test was carried out using only molecular sieve raw powder.
Comparative example 2
Prepared according to the method of example 1 except that no metal oxide is added.
Comparative example 3
Prepared according to the method of example 1, except that no NaOH was added.
Comparative example 4
Prepared according to the method of example 1, except that tourmaline is not added.
Comparative example 5
And (3) directly calcining and crushing the mixture obtained in the step (1).
Adsorption measurement of the adsorbent:
the method for testing the adsorption capacity of the adsorbing material to toluene and formaldehyde comprises the steps of respectively introducing toluene gas and formaldehyde gas in a nitrogen bubbling mode in a 1 cubic meter glass box until the concentration of harmful gas is 100Ppm, adding 1g of the adsorbing material to be tested, and adsorbing until the adsorbing material is saturated, namely, achieving adsorption balance, wherein the toluene and formaldehyde gas is not continuously introduced during the period.
The method for testing the adsorption rate of the adsorbing materials to toluene and formaldehyde comprises the steps of respectively introducing toluene gas and formaldehyde gas in a nitrogen bubbling mode in a 1 cubic meter glass box until the concentration of harmful gas is 100Ppm, putting 1g of adsorbing material to be tested, adsorbing for a period of time (calculated according to one hour in the invention), and calculating the adsorption rate of the adsorbing material in unit mass.
And (3) negative ion release determination:
the amount of negative ions generated was measured by an ion meter.
The indoor conditions of the measurement were: the temperature is 25 ℃, the humidity is 75%, and no wind exists. The amount of negative ions generated was measured for 120 seconds, 5 times, and the average value was obtained.
And (4) performing an experiment according to GB/T21510-.
The results are as follows
TABLE 1 measurement results
| Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
| Adsorption Rate/(ppm/h) | 95 | 61 | 81 | 77 | 82 | 79 |
| Adsorption capacity/(ppm) | 547 | 419 | 461 | 458 | 517 | 504 |
| Amount of negative ions generated (per/cm 3) | 563 | 78 | 432 | 317 | 84 | 431 |
| Antibacterial rate | 91 | 15 | 87 | 34 | 78 | 27 |
According to the performance test results, comparing example 1 with comparative example 1 and comparative example 2, it is found that the adsorption rate and the adsorption capacity can be improved by a certain amount after the adsorbing material is further loaded with the metal oxide. Comparing example 1 with comparative example 4, it is found that tourmaline can significantly improve the anion release rate, and tourmaline powder has synergistic effect on the increase of adsorption rate and adsorption capacity. Comparing example 1 with comparative example 3, it was found that the addition of NaOH further increased the abundance of hydroxyl groups, in addition to acting with AgNO3, thereby increasing the adsorption rate and adsorption capacity. Comparing example 1 and comparative example 5, the hydrothermal method can promote the activity of each substance, promote the combination of each substance, and thus increase the adsorption rate, adsorption capacity, and anion generation amount. Comparing example 1 with comparative example 4, it was found that the tourmaline powder has a synergistic bactericidal effect with the nano silver oxide.
Claims (2)
1. A preparation method of an anion antibacterial adsorption material composition is characterized by comprising the following steps:
(a) 75 parts by mass of raw powder of an X molecular sieve, 8 parts by mass of calcium oxide, 1 part by mass of aluminum oxide, 1 part by mass of magnesium oxide, 10 parts by mass of tourmaline, 3 parts by mass of a binder and 2 parts by mass of a pore-expanding agent, and mixing the raw powder, the calcium oxide, the magnesium oxide, the tourmaline, the binder and the pore-expanding agent according to a ratio to form mixed powder of a uniform system;
(b) soaking the mixed powder in AgNO3After the aqueous solution is ultrasonically vibrated to form a suspension, NaOH solution is added for regulationForming a mixed solution when the pH value is 10;
(c) sealing and heating the mixed solution under hydrothermal condition, separating, sintering at high temperature and crushing to obtain the composition;
wherein the sintering temperature is above 700 ℃;
wherein the binder is a silica sol;
wherein the hydrothermal temperature is 200 ℃ and 300 ℃, and the time is 2-4 hours;
wherein AgNO3The aqueous solution is a saturated solution.
2. A method for purifying indoor air using the anion antibacterial adsorbent material composition prepared according to claim 1.
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| CN108706917A (en) * | 2018-04-04 | 2018-10-26 | 徐雄剑 | A kind of preparation method of antibacterial fireproof heat insulating kieselguhr wall material |
| CN109574631B (en) * | 2019-01-23 | 2022-04-19 | 安庆市江润微纳科技有限公司 | Antibacterial environment-friendly negative ion quartz stone table surface material and preparation method thereof |
| CN110564005B (en) * | 2019-08-28 | 2021-04-09 | 中国第一汽车股份有限公司 | Anion additive |
| CN111254136A (en) * | 2020-03-20 | 2020-06-09 | 王淑君 | Preparation method of bioactive adsorption material |
| CN112694677B (en) * | 2021-01-08 | 2022-03-22 | 会通新材料股份有限公司 | Bamboo charcoal and tourmaline composite Ag-loaded antibacterial agent, antibacterial polypropylene composition and preparation method |
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| CN101934219B (en) * | 2009-06-30 | 2012-11-21 | 郭春樱 | Porous carbon material having effects of long-acting nanometer antibacterium and accelerant, and preparation method thereof |
| CN103611531A (en) * | 2013-12-16 | 2014-03-05 | 长春工业大学 | Preparation method and application of silver oxide/titanium dioxide composite nanofiber photocatalyst |
| CN104888694A (en) * | 2015-05-28 | 2015-09-09 | 同济大学 | Adsorbing material for efficiently adsorbing indoor formaldehyde and methylbenzene gases |
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