CN113559855A - Broad-spectrum absorption catalytic fiber and preparation method and application thereof - Google Patents

Broad-spectrum absorption catalytic fiber and preparation method and application thereof Download PDF

Info

Publication number
CN113559855A
CN113559855A CN202110842549.5A CN202110842549A CN113559855A CN 113559855 A CN113559855 A CN 113559855A CN 202110842549 A CN202110842549 A CN 202110842549A CN 113559855 A CN113559855 A CN 113559855A
Authority
CN
China
Prior art keywords
solution
catalytic fiber
drying
broad spectrum
washing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110842549.5A
Other languages
Chinese (zh)
Inventor
陈运法
李双德
聂林峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Process Engineering of CAS
Original Assignee
Institute of Process Engineering of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Process Engineering of CAS filed Critical Institute of Process Engineering of CAS
Priority to CN202110842549.5A priority Critical patent/CN113559855A/en
Publication of CN113559855A publication Critical patent/CN113559855A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/652—Chromium, molybdenum or tungsten
    • B01J23/6525—Molybdenum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention provides a broad-spectrum absorption catalytic fiber and a preparation method and application thereof. The preparation method comprises the following steps: (1) washing the catalyst carrier with the washing solution, and drying for later use; (2) mixing the noble metal salt solution, the carbon heat conduction material, the precursor solution and the dried catalyst carrier obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; (3) and (3) heating, centrifugally washing and drying the catalyst precursor obtained in the step (2) in sequence to obtain the broad spectrum absorption catalytic fiber. The wide-spectrum absorption catalytic fiber provided by the invention has the wide-spectrum absorption of 300-2400nm, has higher catalytic efficiency when being used for photothermal decomposition of indoor and outdoor VOCs, can realize the decomposition of 45-96% of VOCs by the illumination of a 300W xenon lamp for 30-60min, and has good application prospect.

Description

Broad-spectrum absorption catalytic fiber and preparation method and application thereof
Technical Field
The invention belongs to the technical field of photo-thermal catalysis, relates to an absorption catalytic fiber, and particularly relates to a broad-spectrum absorption catalytic fiber, and a preparation method and application thereof.
Background
In recent years, environmental pollution is one of the main global concerns, and volatile organic gases (VOCs) emitted from interior decoration and oil smoke, and VOCs emitted into the atmosphere from industry cause environmental pollution and affect human health. Among the numerous environmental purification methods, various environmental catalysis techniques such as photocatalysis and electrocatalysis have attracted attention. Catalytic oxidation is an effective method to decompose volatile organic gases into non-toxic carbon dioxide and water in the presence of a catalyst. Compared with the problems of high energy consumption of the traditional thermal catalytic oxidation technology, low efficiency of the photocatalytic purification technology and the like, the development of the photothermal synergistic purification technology is the direction of future development.
The photo-thermal catalysis technology is an environment-friendly technology, can directly utilize light to convert a heat source to degrade organic pollutants, and has the advantages of less pollution, recycling and the like. The catalytic fiber with wide spectrum absorption can improve the utilization rate of sunlight, and utilize the catalyst to absorb the sunlight and convert the sunlight into heat to catalytically decompose volatile organic gas; on the other hand, the catalytic fiber can be used as an integral catalytic material, cut into different sizes, and compared with a catalytic powder material, the catalytic fiber is convenient for the practical application of engineering photo-thermal concerted catalytic decomposition of volatile organic gases.
CN 112892577A discloses a photo-thermal synergetic catalytic material capable of utilizing full-spectrum absorption of near-infrared light, and preparation and application thereof. The photothermal synergetic catalytic material capable of utilizing the full-spectrum absorption of near infrared light is obtained by photo-depositing Au nanoparticles capable of utilizing visible light and having an LSPR effect after solid-phase mechanical mixing of a photothermal material capable of utilizing the near infrared light and a semiconductor photocatalytic material capable of utilizing ultraviolet light in a mass ratio of 1 (1-5); the photo-thermal material capable of utilizing near infrared light is ferroferric oxide nano particles with silicon dioxide layers wrapped on the outer surfaces. The patent discloses a full-spectrum absorption photo-thermal synergetic catalytic material capable of utilizing near infrared light, aiming at the current situations of insufficient utilization of the near infrared light and low photocatalytic efficiency in solar energy. Three types of materials capable of absorbing near infrared light, ultraviolet light and visible light are assembled mainly in a mechanical mixing mode, but the mechanical mixing mode easily causes uneven mixing of different components, so that the problem of low photo-thermal efficiency is caused; on the other hand, the powder catalyst is not convenient for the application of catalytic decomposition of VOCs.
CN 111569859A discloses a cerium dioxide composite chromium dioxide oxygen-containing defect photo-thermal catalyst, a preparation method and an application thereof. The preparation method of the cerium dioxide composite chromium dioxide oxygen-containing defect photo-thermal catalyst comprises the following steps: (1) adding cerium salt and chromium salt into deionized water, heating in a water bath, stirring and keeping for 1-2h, and drying to obtain a catalyst precursor; (2) and grinding the precursor, calcining in an inert gas environment or an air environment, and naturally cooling to obtain the cerium dioxide composite chromium dioxide photo-thermal catalyst with oxygen-containing defects. The patent improves the catalytic activity by manufacturing a composite interface of cerium dioxide and chromium dioxide to form a heterojunction and introducing oxygen defects. However, the absorption spectrum of sunlight is narrow, which causes a problem of low utilization rate of sunlight. On the other hand, the powder catalyst is inconvenient for practical application of catalytic decomposition of VOCs.
Therefore, providing a photo-thermal catalyst with a wider spectrum absorption, increasing the solar light utilization rate, and increasing the catalytic activity has become one of the problems to be solved in the art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a catalytic fiber with wide spectrum absorption, and a preparation method and application thereof. The wide-spectrum absorption catalytic fiber provided by the invention has a wider absorption spectrum, and the light absorption material is loaded on the catalyst carrier in situ to form an integral catalytic material which is used for photothermal decomposition of indoor and outdoor VOCs and has high catalytic efficiency.
The broad spectrum absorption of the invention means that the spectrum absorption range of the catalytic fiber provided by the invention is 300-2400 nm.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a broad spectrum absorbing catalytic fiber comprising a catalyst support and a light absorbing material;
the light absorbing material comprises Bi anchored with noble metal nanoparticles and a carbon heat conducting material2MO6A material; the Bi2MO6M in the material is an element of VIB group;
the absorption spectrum range of the broad spectrum absorption catalytic fiber is 300-2400 nm.
The wide-spectrum absorption catalytic fiber provided by the invention has a wider absorption spectrum, and the light absorption material is loaded on the catalyst carrier in situ to form an integral catalytic material which is used for photothermal decomposition of indoor and outdoor VOCs, has high catalytic efficiency, can realize 45-96% decomposition of VOCs by 300W xenon lamp illumination for 30-60min, and has a better application prospect.
Preferably, the catalyst support comprises aluminosilicate fibers and/or mullite fibers.
Preferably, the Bi2MO6The material comprises Bi2MoO6Material and/or Bi2WO6A material.
Preferably, the noble metal nanoparticles comprise platinum nanoparticles and/or palladium nanoparticles.
Preferably, the noble metal nanoparticles have an average particle size of 2 to 10nm, which may be, for example, 2nm, 3nm, 4nm, 5nm, 6nm, 7nm, 8nm, 9nm or 10nm, but is not limited to the recited values, and other values not recited within the range of values are equally applicable.
Preferably, the noble metal nanoparticles comprise Bi2MO6The amount of material is, for example, 0.5 to 2 wt.%, and can be, for example, 0.5 wt.%, 0.7 wt.%, 1.1 wt.%, 1.3 wt.%, 1.5 wt.%, 1.7 wt.%, 1.9 wt.% or 2 wt.%, although not limited to the recited values, and other values not recited in the range of values are equally applicable.
Preferably, the carbon heat conduction material comprises graphene quantum dots and/or carbon quantum dots.
Preferably, the carbon heat conductive material has an average particle size of 2 to 6nm, and may be, for example, 2nm, 2.5nm, 3nm, 3.5nm, 4nm, 4.5nm, 5nm, 5.5nm or 6nm, but is not limited to the recited values, and other values not recited in the range of values are also applicable.
The particle size of the carbon heat conduction material can influence the absorption range and the light absorption intensity of an absorption spectrum, and the absorption range and the light absorption intensity of the absorption spectrum can be reduced if the particle size is too large.
Preferably, the carbon heat conduction material is Bi2MO60.1-2.0 wt.%, for example 0.1 wt.%, 0.3 wt.%, 0.5 wt.%, 0.7 wt.% of the material1.1 wt.%, 1.3 wt.%, 1.5 wt.%, 1.7 wt.%, 1.9 wt.% or 2 wt.%, but not limited to the values recited, and other values not recited within the numerical ranges are equally applicable.
The carbon heat conduction material disclosed by the invention has overlarge specific gravity, so that the light absorption intensity of an ultraviolet region is increased, and the photo-thermal conversion efficiency is influenced.
In a second aspect, the present invention provides a method for preparing a catalytic fiber with broad spectrum absorption according to the first aspect, the method comprising the following steps:
(1) washing the catalyst carrier with the washing solution, and drying for later use;
(2) mixing the noble metal salt solution, the carbon heat conduction material, the precursor solution and the dried catalyst carrier obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor;
(3) and (3) heating, centrifugally washing and drying the catalyst precursor obtained in the step (2) in sequence to obtain the broad spectrum absorption catalytic fiber.
According to the invention, the noble metal nano-particles and the carbon-based heat conduction material are anchored on Bi by an in-situ hydrothermal method2MO6On the material, the wide spectrum absorption and high photo-thermal conversion are generated, and the catalytic fiber has high surface temperature and is beneficial to improving the photo-thermal catalytic efficiency.
Preferably, the washing solution of step (1) comprises ethanol and/or acetone.
Preferably, the drying temperature in step (1) is 40-100 ℃, for example, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃ or 100 ℃, but not limited to the recited values, and other values not recited in the numerical range are also applicable.
Preferably, the drying time in step (1) is 2-6h, such as 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h, 5.5h or 6h, but not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the catalyst carrier of step (2) comprises alumina silicate fibers and/or mullite fibers.
Preferably, the noble metal salt solution of step (2) includes any one of chloropalladic acid, chloroplatinic acid, palladium nitrate, platinum nitrate, ammonium chloropalladate, ammonium chloroplatinate, sodium chloropalladate, sodium chloroplatinate, or a combination of at least two thereof, and typical non-limiting combinations include a combination of chloropalladic acid and chloroplatinic acid, a combination of chloropalladic acid and palladium nitrate, a combination of ammonium chloropalladate, ammonium chloropalladate and sodium chloropalladate, a combination of ammonium chloropalladate, sodium chloropalladate and sodium chloropalladate, a combination of chloropalladic acid, chloroplatinic acid, palladium nitrate and platinum nitrate, or a combination of platinum nitrate, ammonium chloropalladate, sodium chloropalladate and sodium chloropalladate.
Preferably, the carbon heat conduction material in the step (2) comprises graphene quantum dots and/or carbon quantum dots.
Preferably, the preparation method of the precursor solution in the step (2) is as follows: dissolving bismuth nitrate and sodium salt into a solvent;
preferably, the solvent comprises a glycol solution and/or an ethanol solution.
Preferably, the sodium salt comprises sodium molybdate and/or sodium tungstate.
Preferably, the ratio of the amount of the bismuth nitrate, the sodium salt and the solvent is (1.6-2.4) mmol:1mmol: (30-50) mL, and may be, for example, 1.6mmol:1mmol:30mL, 2mmol:1mmol:40mL, 2.4mmol:1mmol:50mL, 1.6mmol:1mmol:40mL, 1.8mmol:1mmol:40mL, or 2.2mmol:1mmol:40mL, but is not limited to the values listed, and other values not listed in the range of values are equally applicable. Preferably, the heating temperature in step (3) is 140-180 ℃, such as 140 ℃, 145 ℃, 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃ or 180 ℃, but not limited to the recited values, and other unrecited values within the range of values are equally applicable.
Preferably, the heating time in step (3) is 6-38h, such as 6h, 10h, 14h, 18h, 22h, 26h, 30h, 34h or 38h, but not limited to the recited values, and other values not recited in the range of values are also applicable.
Preferably, the centrifugal washing in step (3) is 2-5 times of centrifugal washing with ethanol and water respectively, for example, 2 times, 3 times, 4 times or 5 times.
Preferably, the temperature of the drying in step (3) is 60-110 ℃, for example, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃ or 110 ℃, but not limited to the recited values, and other values not recited in the numerical range are also applicable.
Preferably, the drying time in step (3) is 6-16h, such as 6h, 8h, 10h, 12h, 14h or 16h, but not limited to the recited values, and other values not recited in the numerical range are also applicable.
As a preferred embodiment of the present invention, the method for preparing the catalytic fiber with broad spectrum absorption according to the second aspect comprises the following steps:
(1) washing the catalyst carrier by adopting ethanol and/or acetone, and drying for 6-16h at 40-100 ℃ for later use;
(2) mixing the noble metal salt solution, the carbon heat conduction material, the precursor solution and the dried catalyst carrier obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; the preparation method of the precursor solution comprises the following steps: dissolving bismuth nitrate and sodium salt into an ethanol solution and/or an ethanol solution; the average grain diameter of the carbon heat conduction material is 2-6 nm;
(3) and (3) heating the catalyst precursor obtained in the step (2) at 40-180 ℃ for 6-38h, respectively centrifugally washing with ethanol and water for 2-5 times, and drying at 60-110 ℃ for 6-16h to obtain the broad spectrum absorption catalytic fiber.
In a third aspect, the present invention provides the use of a broad spectrum absorbing catalytic fiber as described in the first aspect for photothermolysis of VOCs indoors and/or outdoors.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the beneficial effects that:
(1) the wide-spectrum absorption catalytic fiber provided by the invention has the wide-spectrum absorption of 300-2400nm, has higher catalytic efficiency when being used for photothermal decomposition of indoor and outdoor VOCs, can realize the decomposition of 95% of VOCs by 300W xenon lamp illumination for 30min, and has good application prospect;
(2) the preparation method of the broad-spectrum absorption catalytic fiber provided by the invention has the advantages of stable process and good repeatability, and is beneficial to industrial production.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments.
Example 1
This example provides a broad spectrum absorbing catalytic fiber with noble metal nanoparticles in Bi2MoO61 wt% of the material, the carbon heat-conducting material is Bi2MoO61.5 wt% of the weight of the material.
The preparation method of the catalytic fiber with wide spectrum absorption comprises the following steps:
(1) washing aluminum silicate fibers by using ethanol, and drying for 10 hours at 80 ℃ for later use;
(2) mixing 0.06mmol of chloroplatinic acid solution, graphene quantum dots, precursor solution and the dried aluminum silicate fiber obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; the preparation method of the precursor solution comprises the following steps: dissolving 2.0mmol of bismuth nitrate and 1.0mmol of sodium molybdate solution into 40mL of ethylene glycol solution; the average particle size of the graphene quantum dots is 5 nm;
(3) and (3) heating the catalyst precursor obtained in the step (2) at 150 ℃ for 15h, respectively centrifugally washing the catalyst precursor with ethanol and water for 2 times, and drying the catalyst precursor at 80 ℃ for 10h to obtain the broad spectrum absorption catalytic fiber.
The spectral absorption range of the broad-spectrum absorption catalytic fiber provided by the embodiment is 300-2400 nm.
Example 2
This example provides a broad spectrum absorbing catalytic fiber having noble metal nanoparticles in Bi2MoO60.5 wt% of the material, the carbon heat conducting material is Bi2MoO60.1 wt% of the weight of the material.
The preparation method of the catalytic fiber with wide spectrum absorption comprises the following steps:
(1) washing aluminum silicate fibers by using ethanol, and drying for 16h at 40 ℃ for later use;
(2) mixing 0.03mmol of ammonium chloroplatinate solution, graphene quantum dots, precursor solution and the dried aluminum silicate fibers obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; the preparation method of the precursor solution comprises the following steps: dissolving 1.6mmol of bismuth nitrate and 1.0mmol of sodium molybdate solution into 30mL of ethylene glycol solution; the average particle size of the graphene quantum dots is 2 nm;
(3) and (3) heating the catalyst precursor obtained in the step (2) at 140 ℃ for 38h, respectively centrifugally washing the catalyst precursor with ethanol and water for 2 times, and drying the catalyst precursor at 60 ℃ for 16h to obtain the broad spectrum absorption catalytic fiber.
The spectral absorption range of the broad-spectrum absorption catalytic fiber provided by the embodiment is 300-2400 nm.
Example 3
This example provides a broad spectrum absorbing catalytic fiber having noble metal nanoparticles in Bi2MoO62 wt% of the material, the carbon heat-conducting material is Bi2MoO62.0 wt% of the weight of the material.
The preparation method of the catalytic fiber with wide spectrum absorption comprises the following steps:
(1) washing aluminum silicate fibers by using ethanol, and drying for 6 hours at 100 ℃ for later use;
(2) mixing 0.12mmol of platinum nitrate solution, graphene quantum dots, precursor solution and the dried aluminum silicate fiber obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; the preparation method of the precursor solution comprises the following steps: dissolving 2.4mmol of bismuth nitrate and 1.0mmol of sodium molybdate solution into 50mL of ethylene glycol solution; the average particle size of the graphene quantum dots is 6 nm;
(3) and (3) heating the catalyst precursor obtained in the step (2) at 180 ℃ for 6h, respectively centrifugally washing the catalyst precursor with ethanol and water for 5 times, and drying the catalyst precursor at 110 ℃ for 6h to obtain the broad spectrum absorption catalytic fiber.
The spectral absorption range of the broad-spectrum absorption catalytic fiber provided by the embodiment is 300-2400 nm.
Example 4
This example provides a broad spectrum absorbing catalytic fiber,the noble metal nanoparticles of the broad spectrum absorption catalytic fiber account for Bi2WO61.5 wt% of the material, the carbon heat conducting material is Bi2WO61 wt% of the weight of the material.
The preparation method of the catalytic fiber with wide spectrum absorption comprises the following steps:
(1) washing mullite fiber by using acetone, and drying for 6 hours at 100 ℃ for later use;
(2) mixing 0.06mmol of chloropalladate solution, carbon quantum dots, precursor solution and the dried aluminum silicate fiber obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; the preparation method of the precursor solution comprises the following steps: dissolving 2mmol of bismuth nitrate and 1.0mmol of sodium tungstate solution into 40mL of ethanol solution; the average grain diameter of the carbon quantum dots is 4.5 nm;
(3) and (3) heating the catalyst precursor obtained in the step (2) at 150 ℃ for 10h, respectively centrifugally washing the catalyst precursor with ethanol and water for 3 times, and drying the catalyst precursor at 80 ℃ for 10h to obtain the broad spectrum absorption catalytic fiber.
The spectral absorption range of the broad-spectrum absorption catalytic fiber provided by the embodiment is 300-2400 nm.
Example 5
This example provides a broad spectrum absorbing catalytic fiber with noble metal nanoparticles in Bi2MoO61 wt% of the material, the carbon heat-conducting material is Bi2MoO61.5 wt% of the weight of the material.
The preparation method of the broad spectrum absorption catalytic fiber is the same as that of the embodiment 1 except that the average particle size of the carbon quantum dots in the step (2) is changed to 15 nm.
The spectral absorption range of the broad-spectrum absorption catalytic fiber provided by the embodiment is 300-1800 nm.
Example 6
This example provides a broad spectrum absorbing catalytic fiber with noble metal nanoparticles in Bi2MoO61 wt% of the material, the carbon heat-conducting material is Bi2MoO61.5 wt% of the weight of the material.
The preparation method of the broad spectrum absorption catalytic fiber is the same as that of the embodiment 1 except that the average particle size of the carbon quantum dots in the step (2) is changed to 1 nm.
The spectral absorption range of the broad-spectrum absorption catalytic fiber provided by the embodiment is 300-2000 nm.
Comparative example 1
The comparative example provides a catalytic fiber, and the preparation method of the catalytic fiber is the same as that of the example 1 except that the mixture of the 0.06mmol chloroplatinic acid solution, the graphene quantum dots, the precursor solution and the dried aluminum silicate fiber obtained in the step (1) in the step (2) is replaced by the mixture of the 0.06mmol chloroplatinic acid solution, the precursor solution and the dried aluminum silicate fiber obtained in the step (1).
The spectral absorption range of the catalytic fiber provided by the comparative example is 300-1800 nm.
Comparative example 2
This comparative example provides a catalytic fiber having noble metal nanoparticles in Bi2MoO61 wt% of the material, the carbon heat-conducting material is Bi2MoO61.5 wt% of the weight of the material.
The preparation method of the catalytic fiber comprises the following steps:
(1) washing aluminum silicate fibers by using ethanol, and drying for 10 hours at 80 ℃ for later use;
(2) mixing the dried aluminum silicate fiber obtained in the step (1), 2.0mmol of bismuth nitrate, 1.0mmol of sodium molybdate solution and 40mL of ethylene glycol solution, heating at 150 ℃ for 15h, respectively centrifugally washing with ethanol and water for 2 times, and drying at 80 ℃ for 10h to obtain Bi2MoO6A material;
(3) equal-volume impregnation of Bi by ethanol solution of chloroplatinic acid2MoO6Adding graphene quantum dots into the material, mechanically grinding and mixing, and drying at 80 ℃ for 10h to obtain the catalytic fiber.
The spectral absorption range of the catalytic fiber provided by the comparative example is 300-1800 nm.
Comparative example 3
This comparative example provides a catalytic fiber having a noble metalRice grain of Bi2MO61 wt% of the material, the carbon heat-conducting material is Bi2MO61.5 wt% of the weight of the material.
The preparation method of the catalytic fiber is the same as that of the embodiment 1 except that the sodium molybdate in the step (2) is replaced by the sodium perrhenate.
The spectral absorption range of the catalytic fiber provided by the comparative example is 300-2000 nm.
The photo-thermal catalysis experiments of toluene were carried out using the catalytic fibers provided in examples 1-6 and comparative examples 1-3, respectively, under the following conditions: the catalyst was used in an amount of 200mg, the reaction mixer consisted of 100ppm toluene, 21% oxygen and nitrogen as the balance gas, the total gas flow was 100mL/min and the light source was a 300W xenon lamp. The concentration of the inlet toluene gas and the concentration of the outlet toluene gas are detected by gas chromatography. The toluene conversion is shown in table 1.
TABLE 1
Figure BDA0003179546720000111
As can be seen from Table 1, the wide-spectrum absorption catalytic fiber provided by the invention can effectively catalyze and decompose toluene, and when the loading of noble metal is 1 wt%, the toluene decomposition of more than 95% can be realized in 30min under the illumination of a 300W xenon lamp, so that the wide-spectrum absorption catalytic fiber has a good application prospect.
In conclusion, the wide-spectrum absorption catalytic fiber provided by the invention has the wide-spectrum absorption of 300-2400nm, has higher catalytic efficiency when being used for photothermal decomposition of indoor and outdoor VOCs, can realize the decomposition of more than 95% of VOCs by 300W xenon lamp illumination for 60min, and has good application prospect; in addition, the preparation method of the broad-spectrum absorption catalytic fiber provided by the invention has the advantages of stable process and good repeatability, and is beneficial to industrial production.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A broad spectrum absorbing catalytic fiber, comprising a catalyst support and a light absorbing material;
the light absorbing material comprises Bi anchored with noble metal nanoparticles and a carbon heat conducting material2MO6A material;
the Bi2MO6M in the material is an element of VIB group;
the absorption spectrum range of the broad spectrum absorption catalytic fiber is 300-2400 nm.
2. The broad spectrum absorbing catalytic fiber of claim 1, wherein the catalyst support comprises aluminosilicate fibers and/or mullite fibers;
preferably, the Bi2MO6The material comprises Bi2MoO6Material and/or Bi2WO6A material.
3. The broad spectrum absorbing catalytic fiber of claim 1 or 2, wherein the noble metal nanoparticles comprise platinum nanoparticles and/or palladium nanoparticles;
preferably, the noble metal nanoparticles have an average particle size of 2 to 10 nm;
preferably, the noble metal nanoparticles comprise Bi2MO60.5-2 wt% of the weight of the material.
4. The broad spectrum absorbing catalytic fiber of any of claims 1-3, wherein the carbon thermal conductive material comprises graphene quantum dots and/or carbon quantum dots;
preferably, the average particle size of the carbon heat conduction material is 2-6 nm;
preferably, the carbon heat conduction material is Bi2MO60.1-2.0 wt% of the weight of the material.
5. A method for preparing a broad spectrum absorption catalytic fiber as defined in any of claims 1-4, wherein said method comprises the steps of:
(1) washing the catalyst carrier with the washing solution, and drying for later use;
(2) mixing the noble metal salt solution, the carbon heat conduction material, the precursor solution and the dried catalyst carrier obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor;
(3) and (3) heating, centrifugally washing and drying the catalyst precursor obtained in the step (2) in sequence to obtain the broad spectrum absorption catalytic fiber.
6. The method according to claim 5, wherein the washing liquid of step (1) comprises ethanol and/or acetone;
preferably, the drying temperature in the step (1) is 40-100 ℃;
preferably, the drying time in the step (1) is 2-6 h.
7. The production method as claimed in claim 5 or 6, wherein the catalyst carrier of step (2) comprises aluminosilicate fibers and/or mullite fibers;
preferably, the noble metal salt solution in step (2) comprises any one of chloropalladic acid, chloroplatinic acid, palladium nitrate, platinum nitrate, ammonium chloropalladate, ammonium chloroplatinate, sodium chloropalladate and sodium chloroplatinate or a combination of at least two of the above;
preferably, the carbon heat conduction material of step (2) comprises graphene quantum dots and/or carbon quantum dots;
preferably, the preparation method of the precursor solution in the step (2) is as follows: dissolving bismuth nitrate and sodium salt into a solvent;
preferably, the sodium salt comprises sodium molybdate and/or sodium tungstate;
preferably, the solvent comprises a glycol solution and/or an ethanol solution;
preferably, the dosage ratio of the bismuth nitrate, the sodium salt and the solvent is (1.6-2.4) mmol to 1mmol (30-50) ml.
8. The method according to any one of claims 5 to 7, wherein the temperature of the heating in step (3) is 140 ℃ to 180 ℃;
preferably, the heating time of the step (3) is 6-38 h;
preferably, the centrifugal washing in the step (3) is that the ethanol and the water are respectively washed for 2 to 5 times;
preferably, the drying temperature in the step (3) is 60-110 ℃;
preferably, the drying time in the step (3) is 6-16 h.
9. The method according to any one of claims 5 to 8, characterized by comprising the steps of:
(1) washing the catalyst carrier by adopting ethanol and/or acetone, and drying for 6-16h at 40-100 ℃ for later use;
(2) mixing the noble metal salt solution, the carbon heat conduction material, the precursor solution and the dried catalyst carrier obtained in the step (1), and stirring and dispersing to obtain a catalyst precursor; the preparation method of the precursor solution comprises the following steps: dissolving bismuth nitrate and sodium salt into ethylene glycol solution;
(3) and (3) heating the catalyst precursor obtained in the step (2) at the temperature of 140 ℃ to 180 ℃ for 6-38h, respectively centrifugally washing the catalyst precursor with ethanol and water for 2-5 times, and drying the catalyst precursor at the temperature of 60-110 ℃ for 6-16h to obtain the broad spectrum absorption catalytic fiber.
10. Use of the broad spectrum absorbing catalytic fiber of any of claims 1-4 for photothermolysis of indoor and/or outdoor VOCs.
CN202110842549.5A 2021-07-26 2021-07-26 Broad-spectrum absorption catalytic fiber and preparation method and application thereof Pending CN113559855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110842549.5A CN113559855A (en) 2021-07-26 2021-07-26 Broad-spectrum absorption catalytic fiber and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110842549.5A CN113559855A (en) 2021-07-26 2021-07-26 Broad-spectrum absorption catalytic fiber and preparation method and application thereof

Publications (1)

Publication Number Publication Date
CN113559855A true CN113559855A (en) 2021-10-29

Family

ID=78167171

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110842549.5A Pending CN113559855A (en) 2021-07-26 2021-07-26 Broad-spectrum absorption catalytic fiber and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN113559855A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103864576A (en) * 2014-03-28 2014-06-18 厦门大学 Method of preparing ethylene glycol by photo-catalytic formaldehyde conversion
WO2014204200A1 (en) * 2013-06-18 2014-12-24 서강대학교산학협력단 Hydrogen fuel converter provided with photocatalyst and method for preparing hydrogen from methanol using photocatalyst
CN106040312A (en) * 2016-06-06 2016-10-26 东华大学 Preparation method for textile fiber/graphene/Bi2MoO6/BiVO4 composite environmental catalytic material
CN106423301A (en) * 2016-12-02 2017-02-22 东华大学 Fiber/carbon nanotube/Bi2MoO6 three-dimensional recyclable efficient catalytic material as well as preparation method and application of catalytic material
CN108940300A (en) * 2018-07-12 2018-12-07 江苏大学 A kind of polynary Cu2O@CQDs/Bi2WO6The Preparation method and use of composite photo-catalyst
CN110893340A (en) * 2018-09-13 2020-03-20 江西理工大学 Preparation method and application of carbon quantum dot carbon nanofiber modified nano bismuth molybdate photocatalyst
CN111905762A (en) * 2020-08-17 2020-11-10 四川大学 Pt/Bi2WO6/CuS ternary composite photocatalyst and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014204200A1 (en) * 2013-06-18 2014-12-24 서강대학교산학협력단 Hydrogen fuel converter provided with photocatalyst and method for preparing hydrogen from methanol using photocatalyst
CN103864576A (en) * 2014-03-28 2014-06-18 厦门大学 Method of preparing ethylene glycol by photo-catalytic formaldehyde conversion
CN106040312A (en) * 2016-06-06 2016-10-26 东华大学 Preparation method for textile fiber/graphene/Bi2MoO6/BiVO4 composite environmental catalytic material
CN106423301A (en) * 2016-12-02 2017-02-22 东华大学 Fiber/carbon nanotube/Bi2MoO6 three-dimensional recyclable efficient catalytic material as well as preparation method and application of catalytic material
CN108940300A (en) * 2018-07-12 2018-12-07 江苏大学 A kind of polynary Cu2O@CQDs/Bi2WO6The Preparation method and use of composite photo-catalyst
CN110893340A (en) * 2018-09-13 2020-03-20 江西理工大学 Preparation method and application of carbon quantum dot carbon nanofiber modified nano bismuth molybdate photocatalyst
CN111905762A (en) * 2020-08-17 2020-11-10 四川大学 Pt/Bi2WO6/CuS ternary composite photocatalyst and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAJUN ZHENG等: "Carbon quantum dot sensitized Pt@Bi2WO6/FTO electrodes for enhanced photoelectro-catalytic activity of methanol oxidation", 《RSC ADVANCES》 *

Similar Documents

Publication Publication Date Title
Tahir et al. Cu-NPs embedded 1D/2D CNTs/pCN heterojunction composite towards enhanced and continuous photocatalytic CO2 reduction to fuels
CN102350346B (en) Preparation method of visible light catalyst with surface plasmon effect and application thereof
CN107159202B (en) Manganese-doped palladium supported catalyst and preparation method and application thereof
CN102836712A (en) Catalyst for completely removing formaldehyde in indoor air at room temperature
CN104785234A (en) Honeycomb active carbon supported catalyst plate
Silva et al. Catalytic and photocatalytic nitrate reduction over Pd-Cu loaded over hybrid materials of multi-walled carbon nanotubes and TiO2
CN104941642A (en) Preparation method for nanogold particle loading CeO2-TiO2 composite catalyst
CN112717916B (en) Rare earth monoatomic supported two-dimensional flaky titanium oxide composite photocatalytic material and preparation method and application thereof
CN113441157A (en) Photoreduction synthesis method of supported high-dispersion metal monatomic catalyst
CN103846086A (en) Catalyst for preparing nitric oxides through catalytic ammonia oxidation
CN100395025C (en) Method for preparing high stable, reproducible load type photocatalyst of Nano cadmium sulphide
Xu et al. Biphasic Ag block assisting electron and energy transfer to facilitate photothermal catalytic oxidation of HCHO over manganese oxide
CN102974379B (en) Method for preparing nitrogen-doped photo-catalytic material containing gallium oxide at low temperature
CN102101051A (en) Method for preparing carbon nano tube supported nano photocatalysis material capable of degrading nitrogen oxides
CN102553562B (en) Multiple modified composite photocatalyst and preparation method thereof
CN112934219A (en) Heteroatom-resistant combustion catalyst, and preparation method and application thereof
CN100415365C (en) Nano photocatalyst of possessing function of molecular engram, preparation method and usage
CN113559855A (en) Broad-spectrum absorption catalytic fiber and preparation method and application thereof
CN115254138B (en) Preparation method and application of Ir-CoO/alumina photo-thermal catalyst
Grandcolas et al. Porogen template assisted TiO 2 rutile coupled nanomaterials for improved visible and solar light photocatalytic applications
CN111871438B (en) Pt/TiN efficient photo-thermal synergistic catalyst and preparation method and application thereof
CN101785997A (en) Method for preparing activated carbon-carried nano-gold catalyst
CN102744065B (en) Catalyst with optothermal coupling effect and preparation method thereof
CN102836735A (en) Micro/mesoporous manganese molecular sieve loading high-efficiency formaldehyde removal catalyst
CN110605117A (en) Ag-loaded nano TiO with atomic-level dispersion2Process for preparing catalyst

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20211029