CN109020388B - Non-photocatalytic diatom ooze material for purifying air formaldehyde and preparation method thereof - Google Patents

Non-photocatalytic diatom ooze material for purifying air formaldehyde and preparation method thereof Download PDF

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CN109020388B
CN109020388B CN201811016982.8A CN201811016982A CN109020388B CN 109020388 B CN109020388 B CN 109020388B CN 201811016982 A CN201811016982 A CN 201811016982A CN 109020388 B CN109020388 B CN 109020388B
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catalyst
diatomite
diatom ooze
formaldehyde
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CN109020388A (en
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詹耀东
刘小军
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Guangdong Taigood Environmental Protection Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a non-photocatalytic typeA diatom ooze material for purifying air formaldehyde and a preparation method thereof. The diatom ooze of the invention decomposes formaldehyde based on a catalytic oxidation method and utilizes MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2The catalyst is used as a composite catalyst, oxygen in the air is used as an oxidant, and formaldehyde in the air is converted into CO under the non-illumination condition2And H2And O, under the condition that a plurality of volatile pollutants coexist, can also show better capability of decomposing formaldehyde. The diatom ooze material has the advantages that the components are reasonably selected, the component ratio of the components is optimized, the diatom ooze material is high in bonding strength, good in humidity adjusting performance and high in air purification rate, and the diatom ooze material is green, environment-friendly and pollution-free.

Description

Non-photocatalytic diatom ooze material for purifying air formaldehyde and preparation method thereof
Technical Field
The invention relates to the technical field of diatom ooze, in particular to a non-photocatalytic diatom ooze material for purifying air formaldehyde and a preparation method thereof.
Background
With the development of social economy and the improvement of the living standard of people, the types of decorative materials for building decoration are more and more, and the decoration is gradually complicated. Because the interior decoration material slowly releases pollutants, the discharge of indoor air pollutants is extremely easy to exceed the standard, and if the indoor air cannot be purified in time, the health of people is seriously threatened. Formaldehyde is a substance with pungent smell, strong toxicity and strong volatility, is one of the main pollutants of indoor air at present, and can generate adverse effects on the respiratory tract of a human body. With the improvement of environmental protection consciousness of people, various decoration materials for removing formaldehyde are produced.
The diatomite has a porous structure, a relatively large specific surface area, strong adsorption performance and strong stability, and can effectively adsorb gas pollutants in the air. The diatom ooze takes the diatomite as a main functional filler, the inorganic cementing material and the auxiliary agent are added, the components such as titanium dioxide and the like are doped into the diatomite, the formaldehyde decomposition effect is achieved, the diatom ooze material does not release harmful substances, no pungent smell is generated, and the diatom ooze is an environment-friendly decoration material. However, titanium dioxide is a photocatalyst, and has an effect of removing formaldehyde by catalytic oxidation under the condition of light, and the photocatalytic efficiency is low, so that the titanium dioxide does not have catalytic oxidation capability under the dark condition without light, and the effect of purifying air is not ideal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a non-photocatalytic diatomite material for purifying air formaldehyde and a preparation method thereof, so that the indoor air purifying efficiency of the diatomite under the non-light condition is improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a non-photocatalytic diatom ooze material for purifying air formaldehyde comprises the following components in parts by weight: 30-35 parts of diatomite, 10-15 parts of calcium carbonate, 6-15 parts of kaolin, 3-6 parts of portland cement, 0.8-2 parts of hydroxypropyl methyl cellulose, 0.5-1.5 parts of flax fiber, 3-6 parts of rubber powder, 20-25 parts of quartz powder, 0.2-0.3 part of dispersing agent, MnO23-6 parts of/diatomite catalyst, 0.5-0.8 part of Au/diatomite catalyst and Au/CeO20.2-1 part of catalyst.
The invention adopts MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2The composite catalyst formed by the catalyst can catalyze and decompose formaldehyde, and improves the indoor air purification capability of the diatom ooze material. Compared with the traditional titanium dioxide photocatalyst, MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2The catalyst can decompose formaldehyde under the condition of room temperature without light, and convert formaldehyde in the air into CO2And H2And O. In the actual use process, the conversion rate of formaldehyde of a single catalyst is easily influenced by the initial concentration of formaldehyde, generally, the conversion rate of formaldehyde is reduced along with the increase of the initial concentration of formaldehyde, and the conversion rates of formaldehyde of different catalysts are different; meanwhile, compared with the condition that formaldehyde exists independently, the conversion rate of the formaldehyde is obviously reduced under the condition that a plurality of volatile pollutants coexist. According to the invention, three different catalysts are compounded, so that the defects of a single catalyst are overcome, and the conversion rate of formaldehyde is synergistically improved.
As a preferable embodiment of the non-photocatalytic type diatom ooze material for purifying formaldehyde in air, MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the diatomite to the diatomite is 0.3-0.8: 1.
In a preferred embodiment of the non-photocatalytic air formaldehyde purifying diatom ooze material, in the Au/diatomite catalyst, the weight ratio of Au to diatomite is 0.02-0.03: 1.
As a preferable embodiment of the non-photocatalytic type diatom ooze material for purifying formaldehyde in air, MnO is2The particle size of diatomite in the diatomite catalyst is 50-150 nm; the particle size of the diatomite in the Au/diatomite catalyst is 50-200 nm.
The particle size and dispersity of the diatomite carrier are closely related to the activity of the catalyst, the catalytic activity is reduced due to the fact that the diatomite is too large in particle size, the diatomite is too small in particle size and easy to agglomerate, and the dispersity is reduced2The particle size of the diatomite in the diatomite catalyst is controlled to be 50-150 nm, the particle size of the diatomite in the Au/diatomite catalyst is controlled to be 50-200 nm, and in the range, the diatomite carrier is beneficial to loading small-size MnO2Or Au particles, enhance the reducing ability of the catalyst.
As a preferred embodiment of the non-photocatalytic type diatom ooze material for purifying formaldehyde in air, the Au/CeO2In the catalyst, Au and CeO2The weight ratio of the catalyst is 0.01-0.05: 1.
In the present invention, by preferably mixing MnO on a carrier2And the loading amount of Au is regulated and controlled to obtain the catalyst with good formaldehyde catalytic oxidation capability.
As the preferable embodiments of the non-photocatalytic type diatom ooze material for purifying formaldehyde in air, the Au/diatomite catalyst and Au/CeO2The weight ratio of the catalyst is 1: 1.
Tests show that the diatom ooze of the invention is applied to Au/diatomite catalyst and Au/CeO2When the weight ratio of the catalyst is 1:1, the catalyst still shows better capability of decomposing formaldehyde under the condition of coexistence of various volatile pollutants.
The non-photocatalytic type diatom ooze material for purifying formaldehyde in air, provided by the invention, comprises the following components in parts by weight: 31 parts of diatomite, 14 parts of calcium carbonate, 10 parts of kaolin and silicon5 parts of acid salt cement, 1.5 parts of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber, 4 parts of rubber powder, 20 parts of quartz powder, 0.2 part of dispersing agent and MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst.
The non-photocatalytic type diatom ooze material for purifying formaldehyde in air, provided by the invention, comprises the following components in parts by weight: 32 parts of diatomite, 12 parts of calcium carbonate, 12 parts of kaolin, 5 parts of Portland cement, 1.8 parts of hydroxypropyl methyl cellulose, 1.5 parts of flax fiber, 4 parts of rubber powder, 22 parts of quartz powder, 0.2 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst.
The non-photocatalytic type diatom ooze material for purifying formaldehyde in air, provided by the invention, comprises the following components in parts by weight: 34 parts of diatomite, 10 parts of calcium carbonate, 8 parts of kaolin, 4 parts of Portland cement, 2 parts of hydroxypropyl methyl cellulose, 0.5 part of flax fiber, 4 parts of rubber powder, 24 parts of quartz powder, 0.3 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst.
According to the technical scheme, the diatom ooze has high bonding strength and good humidity regulation performance by adjusting the component proportion.
The invention also provides a preparation method of the diatom ooze material for purifying air formaldehyde in a non-photocatalytic manner, which comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
As a preferable embodiment of the preparation method of the non-photocatalytic type diatom ooze material for purifying formaldehyde in air, M isnO2The preparation method of the diatomite catalyst comprises the following steps: adding diatomite into a potassium permanganate solution, and obtaining a uniform suspension after ultrasonic dispersion; placing the suspension in a reaction kettle for hydrothermal treatment, wherein the hydrothermal temperature is 120-140 ℃, and the reaction time is 8-12 h; centrifuging the suspension after the hydrothermal reaction, washing and drying the precipitate to obtain the MnO2A diatomite catalyst.
As a preferred embodiment of the preparation method of the non-photocatalytic diatom ooze material for purifying formaldehyde in air, the preparation method of the Au/diatomite catalyst comprises the following steps: preparation of HAuCl4Adjusting the pH of the solution to 6.5-7.2, and adding diatomite into HAuCl in proportion4Stirring the solution for 2-4 h at 55-65 ℃, centrifuging, taking the precipitate, washing, drying, and roasting at 300-350 ℃ for 2-3 h to obtain the Au/diatomite catalyst.
As a preferable embodiment of the preparation method of the non-photocatalytic diatom ooze material for purifying formaldehyde in air, the Au/CeO2The preparation method of the catalyst comprises the following steps: preparation of HAuCl4Adjusting the pH of the solution to 6.5-7.2, and adding CeO2Proportionally adding into HAuCl4Stirring the solution for 2 to 4 hours at the temperature of between 55 and 65 ℃, centrifuging the solution, taking the precipitate, washing and drying the precipitate, and roasting the precipitate for 2 to 3 hours at the temperature of between 300 and 350 ℃ to obtain the Au/CeO2A catalyst.
Compared with the prior art, the invention has the beneficial effects that:
the diatom ooze material of the invention decomposes formaldehyde based on a catalytic oxidation method and uses MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2The catalyst is used as a composite catalyst, oxygen in the air is used as an oxidant, and formaldehyde in the air is converted into CO under the non-illumination condition2And H2And O, under the condition that a plurality of volatile pollutants coexist, can also show better capability of decomposing formaldehyde. According to the invention, by optimizing the proportion of the components, the diatom ooze material has the advantages of high bonding strength, good humidity regulation performance, high air purification rate, environmental friendliness and no pollution.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples. It will be understood by those skilled in the art that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.
MnO as described in the examples below2The preparation method of the diatomite catalyst comprises the following steps: adding diatomite into a potassium permanganate solution, and obtaining a uniform suspension after ultrasonic dispersion; placing the suspension in a reaction kettle for hydrothermal treatment, wherein the hydrothermal temperature is 120-140 ℃, and the reaction time is 8-12 h; centrifuging the suspension after the hydrothermal reaction, washing and drying the precipitate to obtain the MnO2A diatomite catalyst.
The preparation of the Au/diatomaceous earth catalyst described in the following examples was: preparation of HAuCl4Adjusting the pH of the solution to 6.5-7.2, and adding diatomite into HAuCl in proportion4Stirring the solution for 2-4 h at 55-65 ℃, centrifuging, taking the precipitate, washing, drying, and roasting at 300-350 ℃ for 2-3 h to obtain the Au/diatomite catalyst.
Au/CeO as described in the examples below2The preparation method of the catalyst comprises the following steps: preparation of HAuCl4Adjusting the pH of the solution to 6.5-7.2, and adding CeO2Proportionally adding into HAuCl4Stirring the solution for 2 to 4 hours at the temperature of between 55 and 65 ℃, centrifuging the solution, taking the precipitate, washing and drying the precipitate, and roasting the precipitate for 2 to 3 hours at the temperature of between 300 and 350 ℃ to obtain the Au/CeO2A catalyst.
Example 1 influence of the compounding ratio of the composite catalyst on Formaldehyde purification Performance
The non-photocatalytic air formaldehyde purification diatom ooze material comprises the following components in parts by weight: 31 parts of diatomite, 12 parts of calcium carbonate, 15 parts of kaolin, 4 parts of Portland cement, 1.3 parts of hydroxypropyl methyl cellulose, 1 part of flax fiber, 4 parts of rubber powder, 8 parts of quartz powder and 0.2 part of dispersing agent, wherein MnO is added2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2Catalyst and process for preparing sameThe contents of (A) are shown in Table 1, respectively.
Wherein, the MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the Au to the diatomite is 0.5:1, the weight ratio of the Au to the diatomite in the Au/diatomite catalyst is 0.02:1, and the Au/CeO is2In the catalyst, Au and CeO2The weight ratio of the catalyst was 0.03: 1.
The preparation method of the non-photocatalytic type air formaldehyde purification diatom ooze material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
The diatom ooze material prepared in the above way was tested for its formaldehyde purification performance in the absence of light and in the coexistence of formaldehyde, toluene and xylene with reference to the standard JC/T2177-2013, and the results are shown in table 1.
TABLE 1
Figure BDA0001784313570000051
Figure BDA0001784313570000061
From the results in Table 1, it is clear that Au/diatomaceous earth catalyst and Au/CeO2The formaldehyde purification performance of the catalyst compound is obviously superior to that of the catalyst compound used alone, and the diatom ooze of the invention is applied to Au/diatomite catalyst and Au/CeO2When the weight ratio of the catalyst is 1:1, the catalyst still shows better capability of decomposing formaldehyde under the condition of coexistence of various volatile pollutants.
Example 2
The non-photocatalytic diatom ooze material for purifying formaldehyde in air in this example is substantially the same as that in example 1, except that the catalyst contents in this example are shown in Table 2.
TABLE 2
Figure BDA0001784313570000062
And detecting the formaldehyde purification performance of the prepared diatom ooze material. The detection method was the same as in example 1, and the results are shown in Table 2.
As can be seen from Table 2, the formaldehyde scavenging performance of the diatom ooze is determined by MnO2The content of the diatomite catalyst tends to increase and then decrease, when the content is 6 parts by weight, the formaldehyde purification effect of the diatom ooze is optimal, and the three catalysts have the synergistic effect of purifying formaldehyde.
Example 3
As an example of the non-photocatalytic air formaldehyde purifying diatom ooze material of the present invention, the non-photocatalytic air formaldehyde purifying diatom ooze material of the present embodiment comprises the following components by weight: 31 parts of diatomite, 14 parts of calcium carbonate, 10 parts of kaolin, 5 parts of Portland cement, 1.5 parts of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber, 4 parts of rubber powder, 20 parts of quartz powder, 0.2 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst, wherein, MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the Au to the diatomite is 0.5:1, the weight ratio of the Au to the diatomite in the Au/diatomite catalyst is 0.03:1, and the Au/CeO is2In the catalyst, Au and CeO2The weight ratio of the catalyst was 0.04: 1.
The preparation method of the non-photocatalytic type air formaldehyde purification diatom ooze material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2The catalyst is thrown into a mixerAnd after mixing for 3-4 h, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 h, and packaging to obtain the non-photocatalytic air formaldehyde purification diatom ooze material.
Example 4
As an example of the non-photocatalytic air formaldehyde purifying diatom ooze material of the present invention, the non-photocatalytic air formaldehyde purifying diatom ooze material of the present embodiment comprises the following components by weight: 32 parts of diatomite, 12 parts of calcium carbonate, 12 parts of kaolin, 5 parts of Portland cement, 1.8 parts of hydroxypropyl methyl cellulose, 1.5 parts of flax fiber, 4 parts of rubber powder, 22 parts of quartz powder, 0.2 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst, wherein, MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the Au to the diatomite is 0.6:1, the weight ratio of the Au to the diatomite in the Au/diatomite catalyst is 0.02:1, and the Au/CeO is2In the catalyst, Au and CeO2The weight ratio of the catalyst was 0.05: 1.
The preparation method of the non-photocatalytic type air formaldehyde purification diatom ooze material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
Example 5
As an example of the non-photocatalytic air formaldehyde purifying diatom ooze material of the present invention, the non-photocatalytic air formaldehyde purifying diatom ooze material of the present embodiment comprises the following components by weight: 34 parts of diatomite, 10 parts of calcium carbonate, 8 parts of kaolin, 4 parts of Portland cement, 2 parts of hydroxypropyl methyl cellulose,0.5 part of flax fiber, 4 parts of rubber powder, 24 parts of quartz powder, 0.3 part of dispersant and MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst, wherein, MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the Au to the diatomite is 0.6:1, the weight ratio of the Au to the diatomite in the Au/diatomite catalyst is 0.025:1, and the Au/CeO is2In the catalyst, Au and CeO2The weight ratio of the catalyst was 0.05: 1.
The preparation method of the non-photocatalytic type air formaldehyde purification diatom ooze material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
Example 6
As an example of the non-photocatalytic air formaldehyde purifying diatom ooze material of the present invention, the non-photocatalytic air formaldehyde purifying diatom ooze material of the present embodiment comprises the following components by weight: 30 parts of diatomite, 15 parts of calcium carbonate, 15 parts of kaolin, 6 parts of Portland cement, 0.8 part of hydroxypropyl methyl cellulose, 1.5 parts of flax fiber, 3 parts of rubber powder, 20 parts of quartz powder, 0.25 part of dispersant, MnO26 parts of diatomite catalyst, 0.6 part of Au/diatomite catalyst and Au/CeO20.6 part of catalyst, wherein, MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the Au to the diatomite is 0.3:1, the weight ratio of the Au to the diatomite in the Au/diatomite catalyst is 0.02:1, and the Au/CeO is2In the catalyst, Au and CeO2The weight ratio of the catalyst was 0.02: 1.
The preparation method of the non-photocatalytic type air formaldehyde purification diatom ooze material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
Example 7
As an example of the non-photocatalytic air formaldehyde purifying diatom ooze material of the present invention, the non-photocatalytic air formaldehyde purifying diatom ooze material of the present embodiment comprises the following components by weight: 35 parts of diatomite, 10 parts of calcium carbonate, 6 parts of kaolin, 3 parts of Portland cement, 2 parts of hydroxypropyl methyl cellulose, 0.5 part of flax fiber, 6 parts of rubber powder, 25 parts of quartz powder, 0.3 part of dispersant, MnO26 parts of diatomite catalyst, 0.5 part of Au/diatomite catalyst and Au/CeO20.5 part of catalyst, wherein, MnO is2In a kieselguhr catalyst, MnO2The weight ratio of the Au to the diatomite is 0.3:1, the weight ratio of the Au to the diatomite in the Au/diatomite catalyst is 0.02:1, and the Au/CeO is2In the catalyst, Au and CeO2The weight ratio of the catalyst was 0.01: 1.
The preparation method of the non-photocatalytic type air formaldehyde purification diatom ooze material comprises the following steps:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
Under the conditions of no light and coexistence of formaldehyde, toluene and xylene, the formaldehyde purification performance and the formaldehyde purification effect durability of the diatom ooze materials prepared in the embodiments 3-7 are detected by referring to a standard JC/T2177-2013, and the results are shown in Table 3.
TABLE 3
Example 3 Example 4 Example 5 Example 6 Example 7
Formaldehyde purification Performance (%) 94 92 95 91 90
Durability of Formaldehyde cleaning Effect (%) 77 75 73 73 70
From the results in table 3, it is understood that the diatom ooze of the present invention has a good lasting ability of formaldehyde purification in the presence of various volatile contaminants.
The bonding strength, the humidity regulating performance, the mold-proof performance and the mold-proof durability of the diatom ooze materials of the examples 3-7 are detected according to the standard JC/T2177-2013, the results are shown in the table 4, and the results are shown in the table 4.
TABLE 4
Figure BDA0001784313570000091
Figure BDA0001784313570000101
The content of harmful substances in the diatom ooze materials of examples 3-7 was determined according to the standard JC/T2177-2013, and the results are shown in Table 5.
TABLE 5
Figure BDA0001784313570000102
The detection limit of the VOC content in Table 5 is 1 g/kg; the detection limit of the total amount of the benzene, the toluene, the ethylbenzene and the xylene is 50 mg/kg; the detection limit of free formaldehyde is 5 mg/kg; the detection limit of soluble heavy metals is 10 mg/kg.
The results in table 5 show that the diatom ooze material of the invention does not contain soluble heavy metals such as lead, volatile organic compounds or free formaldehyde, does not pollute the environment, and is safe and environment-friendly.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. A non-photocatalytic diatom ooze material for purifying air formaldehyde is characterized by comprising the following components in parts by weightThe components are as follows: 30-35 parts of diatomite, 10-15 parts of calcium carbonate, 6-15 parts of kaolin, 3-6 parts of portland cement, 0.8-2 parts of hydroxypropyl methyl cellulose, 0.5-1.5 parts of flax fiber, 3-6 parts of rubber powder, 20-25 parts of quartz powder, 0.2-0.3 part of dispersing agent, MnO23-6 parts of/diatomite catalyst, 0.5-0.8 part of Au/diatomite catalyst and Au/CeO20.2-1 part of a catalyst; the MnO2In a kieselguhr catalyst, MnO2The weight ratio of the diatomite to the diatomite is 0.3-0.8: 1; in the Au/diatomite catalyst, the weight ratio of Au to diatomite is 0.02-0.03: 1.
2. The non-photocatalytic air formaldehyde purifying diatom ooze material of claim 1, wherein said MnO is2The particle size of diatomite in the diatomite catalyst is 50-150 nm; the particle size of the diatomite in the Au/diatomite catalyst is 50-200 nm.
3. The non-photocatalytic air formaldehyde purifying diatom ooze material of claim 1 wherein said Au/CeO2In the catalyst, Au and CeO2The weight ratio of the catalyst is 0.01-0.05: 1.
4. The non-photocatalytic air formaldehyde purifying diatom ooze material of claim 1 wherein said Au/diatomaceous earth catalyst is in combination with Au/CeO2The weight ratio of the catalyst is 1: 1.
5. The non-photocatalytic air formaldehyde purifying diatom ooze material of claim 1, comprising the following components in parts by weight: 31 parts of diatomite, 14 parts of calcium carbonate, 10 parts of kaolin, 5 parts of Portland cement, 1.5 parts of hydroxypropyl methyl cellulose, 1.2 parts of flax fiber, 4 parts of rubber powder, 20 parts of quartz powder, 0.2 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst.
6. The non-photocatalytic of claim 1The diatom ooze material for purifying air formaldehyde is characterized by comprising the following components in parts by weight: 32 parts of diatomite, 12 parts of calcium carbonate, 12 parts of kaolin, 5 parts of Portland cement, 1.8 parts of hydroxypropyl methyl cellulose, 1.5 parts of flax fiber, 4 parts of rubber powder, 22 parts of quartz powder, 0.2 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst.
7. The non-photocatalytic air formaldehyde purifying diatom ooze material of claim 1, comprising the following components in parts by weight: 34 parts of diatomite, 10 parts of calcium carbonate, 8 parts of kaolin, 4 parts of Portland cement, 2 parts of hydroxypropyl methyl cellulose, 0.5 part of flax fiber, 4 parts of rubber powder, 24 parts of quartz powder, 0.3 part of dispersant, MnO26 parts of diatomite catalyst, 0.8 part of Au/diatomite catalyst and Au/CeO20.8 part of catalyst.
8. The preparation method of the non-photocatalytic air formaldehyde purification diatom ooze material according to any one of claims 1-7, comprising the steps of:
(1) weighing raw materials of each component according to a proportion;
(2) mixing diatomite and MnO2Catalyst/diatomaceous earth, Au/diatomaceous earth and Au/CeO2After the catalyst is put into a mixer and mixed for 3-4 hours, adding calcium carbonate, kaolin, portland cement, hydroxypropyl methyl cellulose, flax fiber, rubber powder, quartz powder and a dispersing agent, mixing for 4-5 hours, and packaging to obtain the non-photocatalytic air formaldehyde-purifying diatom ooze material.
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