KR20170046858A - Basalt fiber-perovskite metal titanate photocatalyst with core/shell structure and preparation method of the same - Google Patents
Basalt fiber-perovskite metal titanate photocatalyst with core/shell structure and preparation method of the same Download PDFInfo
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/002—Catalysts characterised by their physical properties
- B01J35/004—Photocatalysts
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- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/002—Catalysts characterised by their physical properties
- B01J35/0073—Distribution of the active metal ingredient
- B01J35/008—Distribution of the active metal ingredient egg-shell like
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/02—Solids
- B01J35/10—Solids characterised by their surface properties or porosity
- B01J35/1004—Surface area
- B01J35/1014—10-100 m2/g
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C9/00—Aliphatic saturated hydrocarbons
- C07C9/02—Aliphatic saturated hydrocarbons with one to four carbon atoms
- C07C9/04—Methane
Abstract
The present invention relates to a core layer comprising basalt fibers; And a shell layer containing an oxide represented by the following formula (1): < EMI ID = 1.0 >
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
The basalt fiber photocatalyst of the core / shell structure according to the present invention comprises a basalt fiber as a core layer and an oxide of an ABO 3 structure as a shell layer to promote separation of electron-hole pairs induced by light, And an oxide of ABO 3 structure is formed in the form of bases in the basalt fiber including a large number of pores, so that the reaction surface area is wide and the absorption amount of the reaction product is high, so that the efficiency of the photocatalyst is excellent. Particularly, The yield is excellent.
Description
The present invention relates to a basalt fiber-based photocatalyst having a core / shell structure and a method for producing the same.
Due to the use of fossil fuels, the concentration of atmospheric carbon dioxide, a major cause of global warming, has steadily increased over the last few centuries. For recent mitigating global warming and lack of fossil fuel by the carbon dioxide, producing carbon dioxide using a photocatalyst with an organic molecule, such as methane (CH 4), formic acid (HCOOH), formaldehyde (HCHO) or methanol (CH 3 OH) Artificial photosynthetic technology has been developed. In particular, the method of manufacturing or converting organic molecules using the photocathode reaction of carbon dioxide has been attracting attention as an environmentally friendly and sustainable technology using only water and solar energy.
The methane represents the simplest form of hydrocarbons but is the main component of natural gas with the highest energy per unit mass (55.7 kJ / g). It is a useful raw material for electricity generation as a fuel for gas turbines or steam generators.
As described above, it is important to use an excellent photocatalyst for producing or converting carbon dioxide into methane using solar energy. TiO 2, which is used as a photocatalyst, is chemically stable, non-toxic and abundant in nature, and is used as a photocatalyst for photoreduction of carbon dioxide.
In particular, recently, TiO 2 is mixed with a porous material such as zeolite, silicate, or polycrystalline fiber to improve charge separation efficiency and reaction species adsorption efficiency, and to reduce the recombination rate of reaction products to TiO 2 -bonded photocatalyst, There have been a lot of researches on the technique of composite photocatalyst.
For example, studies have been reported on TiO 2 / ZnAl layered double hydroxide (LDH) or TiO 2 -WO 3 -bentonite complexes coated on a porous mineral substrate, It is difficult to use it as a photocatalyst for production.
In addition, there is no research on the photocatalyst that converts basalt fiber into methane by using basalt fiber as a supporting layer, and it is necessary to study it.
The object of the present invention is to provide a technical content of a basalt fiber-based photocatalyst having a core / shell structure for converting carbon dioxide into methane using basalt fiber.
In order to achieve the above-mentioned object, according to the present invention, there is provided a core layer comprising basalt fibers; And a shell layer containing an oxide represented by the following formula (1): < EMI ID = 1.0 >
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
The basalt fiber is characterized by a diameter of 8 to 25 nm.
And the oxide is PbTiO 3 .
The average crystal size of the PbTiO 3 is 30 to 50 nm.
And the surface area of the PbTiO 3 is 15 to 25 m 2 / g.
The PbTiO 3 is characterized by absorbing light having a wavelength of 250 to 400 nm.
The present invention relates to a method for producing a basalt fiber, comprising: (a) acid-treating a basalt fiber; (b) immersing the basalt fiber of step (a) in a solution containing an oxide represented by the following formula (1); And (c) annealing the basalt fiber of step (b). ≪ Desc /
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
The step (a) is characterized in acid treatment under the condition of pH 1.5 to 3.
And the step (b) is repeated three or more times.
In addition, the step (c) is characterized in that the annealing is performed at a temperature of 300 to 600 ° C.
The present invention provides a methane generator comprising a photocatalyst produced by the above-described method as a photocatalyst for the methanation reaction of carbon dioxide and water.
The basalt fiber-based photocatalyst of the core / shell structure according to the present invention comprises a basalt fiber as a core layer and an oxide of an ABO 3 structure as a shell layer to facilitate the separation of the electron- The photocatalytic efficiency of the photocatalyst is improved due to the increase of the absorption of the reactant due to the broadening of the reaction surface area and the formation of the ABO 3 structure oxide in the basal fiber having a large number of pores. The production yield is excellent. In addition, an oxide having an ABO 3 structure having a large particle size is included as a shell layer to increase the adsorption amount of the reactant, thereby improving the catalytic performance.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram schematically showing a mechanism of photocatalysis of carbon dioxide by a photocatalyst of a basalt fiber core / PbTiO 3 shell structure which is an example of the present invention. FIG.
Fig. 2 is a view showing an XRD pattern of the photocatalyst and the basalt fiber according to the embodiment and the comparative example 1. Fig.
3 is an SEM image of photocatalyst and basalt fiber according to Example and Comparative Example 1. Fig.
4 is a graph showing the atomic composition of the photocatalyst and the basalt fiber according to the embodiment and the comparative example 1 by energy-dispersive X-ray spectroscopy.
Fig. 5 is a result of energy dispersive X-ray spectroscopy analysis showing the atomic composition of the nodal surface of the photocatalyst according to Comparative Example 1. Fig.
FIG. 6 is a graph showing adsorption-desorption isotherm curves of the photocatalyst according to Example and Comparative Example 1. FIG.
7 is a diagram showing the results of UV-visible light absorption spectroscopy and Tauc's plots of the photocatalyst and the basalt fiber according to Example and Comparative Example 1. FIG.
Fig. 8 is a graph showing the methane production yields of the photocatalyst and the basalt fiber according to Examples and Comparative Examples 1 to 3. Fig.
FIG. 9 is a graph showing the temperature programmed desorption analysis results of the photocatalyst and the basalt fiber according to the embodiment (A) and the results of the thermogravimetric analysis of the photocatalyst and the basalt fiber according to the example (B) Fig.
Hereinafter, the present invention will be described in detail.
The present invention relates to a core layer comprising basalt fibers; And a shell layer containing an oxide represented by the following formula (1): < EMI ID = 1.0 >
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
The oxide of the ABO 3 structure may more preferably be PbTiO 3 .
As described above, the basalt fiber-based photocatalyst of the core / shell structure according to the present invention includes basalt fiber as the core layer and oxide of the ABO 3 structure as the shell layer to promote the separation of the electron- The photocatalytic efficiency is improved due to the increase of the absorption amount of the reactant due to the wide reaction surface area and the formation of the ABO 3 structure oxide in the basalt fiber including many pores. The yield of methane production is excellent. In addition, an oxide having an ABO 3 structure having a large particle size is included as a shell layer to increase the adsorption amount of the reactant, thereby improving the catalytic performance.
Hereinafter, the present invention will be described in detail with reference to a photocatalyst of a basalt fiber core / PbTiO 3 shell structure containing PbTiO 3 as an oxide of ABO 3 structure.
In the case of a photocatalyst of a basalt fiber core / PbTiO 3 shell structure, a PbTiO 3 nanoparticle may be coated on the surface of the basalt fiber to form a core / shell structure.
The core / shell structure may appear as a node with PbTiO 3 nanoparticles partially coated on the surface of the basalt fiber without covering all of the basalt fiber surfaces. As a result, a large surface area can be provided as compared with a photocatalyst having a smooth surface, so that reactants can be effectively adsorbed to the basalt fiber core.
The basalt fiber constituting the core of the photocatalyst according to the present invention may have a diameter of 8 to 25 nm. On the other hand, the length of the basalt fiber is not particularly limited and may be appropriately selected depending on the use of the photocatalyst including the core.
In addition, the average crystal size of the PbTiO 3 shell particles may be 30 to 50 nm, preferably 35 to 45 nm.
In addition, the surface area can be 15 to 25 m 2 / g, preferably 18 to 22 m 2 / g.
The PbTiO 3 particles have a particle size of 8 to 9 times larger than that of TiO 2 and a surface area of 7 to 7.5 times larger than that of TiO 2 .
The photocatalyst of the above-mentioned basalt fiber core / PbTiO 3 shell structure is capable of exhibiting photocatalytic activity by absorbing light having a wavelength of 250 to 400 nm including PbTiO 3 as a photocatalyst.
For example, the photocatalyst of the above-described basalt fiber core / PbTiO 3 shell structure can reduce carbon dioxide to methane through the photocatalytic reduction mechanism as shown in FIG.
More specifically, since PbTiO 3 has a shorter band gap than TiO 2 , excitation by photons in PbTiO 3 on the basalt fiber core / PbTiO 3 shell compound starts quickly. The excited electrons can be efficiently transferred to carbon dioxide molecules. When carbon dioxide molecules are preferentially adsorbed on the surface of the basalt fiber, the holes in the valance band of PbTiO 3 are trapped by water vapor species and transferred to OH radicals and protons. The resulting proton is converted electronically to H radicals and H radicals react with the C and CO radicals formed by the reduction of carbon dioxide on the basalt fiber, resulting in the formation of methane.
The basalt fiber cores can promote the separation of the photoinduced electron-hole pairs (e - / h + ) on the PbTiO 3 shell and can adsorb many reactants because of their porosity. In addition, PbTiO 3, which is an oxide having a large particle size, is easier to transfer electrons than TiO 2 and can absorb a large amount of reactants.
Therefore, the photocatalyst of the basalt fiber core / PbTiO 3 shell structure according to an example of the present invention can exhibit a high carbon dioxide reducing effect.
The present invention relates to a method for producing a basalt fiber, comprising: (a) acid-treating a basalt fiber; (b) immersing the basalt fiber of step (a) in a solution containing an oxide represented by the following formula (1); And (c) annealing the basalt fiber of step (b). The present invention also provides a method of producing a basalt fiber photocatalyst of core / shell structure.
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
The step (a) is an acid treatment of the basalt fiber, which can be treated in a concentrated acid solution to remove impurities and the coated polymer on the surface of the basalt fiber. The pH of the acid solution may be pH 1.5-3.
The step (b) is a step of immersing the basalt fiber in a solution containing an oxide represented by the following formula (1), and a sol-gel dip-coating method may be used. May be repeated three or more times.
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
The step (c) is a step of annealing the basalt fiber, and the additive of the photocatalyst powder of the core / shell structure can be removed by annealing. In this step, annealing may be performed at a temperature of 300 to 600 ° C, and preferably at a temperature of 400 to 500 ° C.
The present invention provides a methane generator comprising a photocatalyst produced by the above-described production method as a photocatalyst for a methanation reaction of carbon dioxide and water.
The basalt fiber photocatalyst of the core / shell structure described above facilitates electron transfer and promotes the separation of the optically induced electron-hole pairs (e - / h + ), as well as the basalt fiber And has a high photocatalytic efficiency, and is actively reacted with gaseous carbon dioxide and water to have a high methane production efficiency, and can be effectively used as a photocatalyst of a methane generator.
The basalt fiber photocatalyst of the core / shell structure according to the present invention comprises a basalt fiber as a core layer and an oxide of an ABO 3 structure as a shell layer to promote separation of electron-hole pairs induced by light, And an oxide of ABO 3 structure is formed in the form of bases in the basalt fiber including a large number of pores, so that the reaction surface area is wide and the absorption amount of the reaction product is high, so that the efficiency of the photocatalyst is excellent. Particularly, The yield is excellent. In addition, an oxide having an ABO 3 structure having a large particle size is included as a shell layer to increase the adsorption amount of the reactant, thereby improving the catalytic performance.
Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. The embodiments presented are only a concrete example of the present invention and are not provided for the purpose of limiting the scope of the present invention.
<Examples>
After adding 1.0 mol of lead (Pb (NO 3 ) 2 , 99.9%, JunseiChem.Co, Japan) to 200 ml of distilled water, the pH of the mixture was adjusted to 11 with 3.0 M NaOH, Lt; / RTI > Then, 1.0 mol of titanium tetraisopropoxide (TTIP, 99.95%, Junsei Chem. Co., Japan) was dropwise added to the mixture. The mixture was stirred at room temperature for 2 hours, transferred to an autoclave, and heat-treated in a nitrogen atmosphere, at a pressure of about 3.0 atm and at 200 DEG C for 18 hours. The resultant was washed with distilled water fought until
Basalt fibers were etched in a concentrated acid solution for 1 hour. After drying the basalt fiber substrate, the dried substrate was immersed in a 1.0 M PbTiO 3 ethanol colloid solution fixed at pH 2.5 with acetic acid and then aged for 10 minutes. The basalt fiber was filtered and dried at 80 ° C for 1 hour.
The dried basalt fibers were re-immersed in a 1.0 M PbTiO 3 ethanol colloid solution and subjected to aging, filtration and drying steps, and this process was repeated five times.
Finally, the dried basalt fibers were annealed in air at 450 캜 for 30 minutes to obtain a core / shell structure of basalt fiber-PbTiO 3 compound.
≪ Comparative Example 1 &
A photocatalyst having a core / shell structure was obtained in the same manner as in Example except that TiO 2 was used instead of PbTiO 3 .
≪ Comparative Example 2 &
Basalt fiber A photocatalyst of core / shell structure was obtained in the same manner as in Example except that glass wool was used instead.
≪ Comparative Example 3 &
Basalt fiber A photocatalyst having a core / shell structure was obtained in the same manner as in Comparative Example 1, except that glass wool was used instead.
<Experimental Example 1> Physical property analysis of photocatalyst
(1) Analysis of structure and crystal size of the photocatalyst produced
In order to analyze the physical properties of the produced photocatalyst, the structure and crystal size of the photocatalyst and the basalt fiber according to Examples and Comparative Example 1 were analyzed by X-ray diffraction (XRD) using nickel-filtered CuKα radiation (30 kV, 30 mA) ) Pattern, and the result is shown in Fig.
As shown in FIG. 2, the PbTiO 3 of the Examples is (001) -21.39, (100) -22.78, (101) -31.45, ) -46.54, (102) -49.70, (201) -51.75, (210) -52.42, (112) -55.37, (211) -57.27, 70.47, (221) -72.38, (303) -72.68, (301) -76.79 and (310) -77.30 °. As a result, it can be confirmed that the PbTiO 3 powder is tetragonal (P4 / mmm group).
The XRD pattern of Comparative Example 1 is associated with pure anatase. Peaks were observed at 25.3 °, 38.0 °, 48.2 °, 54 °, 63 ° and 68 ° 2θ, respectively, .
The basalt fibers did not show any peak associated with the metal oxide and were found to be amorphous. As a result, many metal oxides were mixed irregularly, suggesting that each peak overlapped.
The XRD peak is clearly visible, indicating that the degree of arrangement of the core / shell structure between the basalt fiber and the metal oxide nanoparticles is excellent.
A wider peak was observed in Comparative Example 1 than in the Examples, and thus it can be confirmed that the photocatalyst according to the Example has a larger crystal size.
The crystal size of crystals was 39.57 and 15.7 nm, respectively, in the case of Example and Comparative Example 1, and the average crystallite size determined by XRD peak of TiO 2 anatase (101) and PbTiO 3 fibroblastite (101) and Scherrer equation.
(2) Analysis of the particle shape of the produced photocatalyst
The microstructure of the photocatalyst was observed using an electron microscope (SEM, JEOL 2000EX) in order to analyze the particle shape of the present invention, Comparative Example 1 and the basalt fiber, and it is shown in FIG.
As shown in FIG. 3, the photocatalyst according to the example and the comparative example 1 can confirm regular arrangement of nanoparticles in the parallel and perpendicular directions of the two shells, and thus it can be confirmed that the core / shell structure.
PbTiO 3 and TiO 2 nanoparticles were found to be partially coated on the surface of the fiber without covering the surface of the basalt fiber completely, and the shells appeared to have the shape of a node, and the spacing between the nodes was very constant have. The shell thickness was thicker in the photocatalyst according to Example 1 than in Comparative Example 1, which is due to the particle size of PbTiO 3 .
(3) Surface analysis of manufactured photocatalyst
The presence of the metal on the surface of the photocatalyst was analyzed using the energy dispersive X-ray spectroscopy (EDAX) to analyze the surface of the basalt fiber according to Examples of the present invention, Comparative Example 1, and the results are shown in FIG.
As shown in Fig. 4, various metal oxides such as Na, K, Ca, Mg, Al, Si, Fe and Ti were observed in the basalt fiber. Pure basalt fiber was composed of 15 wt% of Si, 2.43 wt% of total alkali metals, 0.98 wt% of Ti, 4.23 wt% of Fe and 4.56 wt% of Al. The contents of Ca and Mg as the carbon dioxide adsorbent were 2.82 wt% and 2.04 wt%, respectively, and the photocatalyst according to the comparative example and the example contained 27.42 wt% of Ti and 17.12 wt% of Pb, respectively.
Since the composition may vary depending on the measurement position, the nodal surfaces of the photocatalyst according to Comparative Example 1 were compared to confirm the difference in composition, and the results are shown in FIG.
Al and Si were detected in TiO 2 coated partial shells even with fully coated basalt fibers with pure TiO 2 . Thus, it can be seen that the TiO 2 particles are stably coated on the surface of the basalt fiber as a shell and bonded to the Al and Si components in the basalt fiber, and finally the AlSiTi oxide composite is formed. In addition, other elements such as Ca and Fe were observed in the nodal plane.
(4) Analysis of adsorption behavior of photocatalyst
Fig. 6 shows an adsorption / desorption isotherm curve using N 2 at 77K to analyze the adsorption behavior of the photocatalyst according to Examples and Comparative Example 1.
Generally, the width of the hysteresis slope means the pressure difference between adsorption and desorption. As shown in FIG. 6, the hysteresis slope did not appear in spite of the high relative pressure, and thus it can be judged that the slope of the photocatalyst according to Example and Comparative Example 1 is insignificant.
The BET surface area of the photocatalyst according to Example and Comparative Example 1 was 20.72 m 2 / g in Example and 2.34 m 2 / g in Comparative Example 1, and the surface area of the photocatalyst according to the Example was wider, Further, it can be confirmed that the photocatalyst according to the embodiment is wider. Accordingly, during the photocatalytic reaction, it can be predicted that the photocatalyst according to the example can absorb more reaction gas than the photocatalyst according to the comparative example 1.
EXPERIMENTAL EXAMPLE 2 Analysis of Photocatalytic Activity of Basalt Fiber Photocatalyst
(1) Ultraviolet-visible spectral reflectance analysis of basalt fiber photocatalyst
In order to analyze the photocatalytic activity of the Example of the present invention, Comparative Example 1 and the basalt fiber, the ultraviolet-visible ray spectrum reflectance was obtained using a
The cyclic voltammetry (CV, BAS 100B) was performed using the working and counter electrodes and Ag / AgCl as the reference electrode.
As shown in FIG. 7, it can be seen that the pure basalt fiber absorbs a broad range of wavelengths due to the presence of a transition metal such as Fe, and the major absorption peak of the photocatalyst according to Example and Comparative Example 1 becomes clearer. The photocatalyst according to Examples and Comparative Example 1 exhibited a maximum band in the range of 250 to 400 nm, and Ti-O-Ti species such as Ti (IV) species coordinated in hexahedral form can be confirmed to be polymerized in a high degree of coordination. This band shifted to a higher wavelength in the photocatalyst according to Example 1 compared to Comparative Example 1.
On the other hand, the absorption spectrum shows a steep absorption edge, similar to the results obtained from Tauc's equation.
The bandgap calculated using the Tauc's equation was 1.92 (525 nm) eV in the case of the embodiment and 2.48 (425 nm) in the case of the comparative example 1.
Therefore, it can be confirmed that the photocatalyst according to the embodiment has improved photocatalytic activity.
(2) Optical reduction and gas adsorption capacity analysis of basalt fiber photocatalyst
The adsorption power of Examples, Comparative Examples 1 to 3, and basalt fiber was measured using CO 2 -TPD (Temperature programmed desorption), H 2 O-TPD test and thermogravimetric analysis (TGA).
The photoreduction ability of carbon dioxide and water vapor to methane in Examples, Comparative Examples 1 to 3, and basalt fiber is shown in Fig. As shown in FIG. 8, the photocatalysts according to Examples and Comparative Example 1 showed higher photocatalytic activity for carbon dioxide photoreduction than Comparative Example 2, Comparative Example 3 and basalt fiber.
It was released of 80 mmol / g cat L methane from basalt fiber, thus, and the basalt fiber is confirmed that containing a small amount of TiO 2, the level of the generated methane in Comparative Example 3 50 mmol / g cat L Respectively. On the other hand, the maximum value of the methane yield was 290 mmol / g cat L after 6 hours in the example, and the methane yield of the photocatalyst according to Comparative Example 1 was 170 mmol / g cat L . This difference in yields is attributable to the band gap and the gas absorption capacity of the TiO 2 and PbTiO 3 nanoparticles, thus confirming that the basalt fiber support is suitable for photoreaction.
In addition, the desorption profile of carbon dioxide and water vapor was obtained at a high temperature of 900 ° C or higher, and is shown in FIG.
As shown in FIG. 9A, the desorption curve strength of carbon dioxide was higher in the examples than in the basalt fibers, especially at low temperatures (500-700 ° C). Accordingly, it can be confirmed that considerably more carbon dioxide molecules are adsorbed on the surface of the photocatalyst according to the embodiment.
As shown in Fig. 9B, the water vapor desorption curve was also significantly increased in the photocatalyst according to the example, as compared with the basalt fiber.
Generally, TiO 2 , which is hydrophilic, causes carbon dioxide and water vapor to form basalt, TiO 2 And it can be expected to be preferentially adsorbed by the PbTiO 3. Therefore, it can be seen that the number of carbon dioxide and water vapor molecules adsorbed by the basalt fiber and PbTiO 3 in the photocatalyst according to the embodiment is relatively increased and the catalyst performance is improved.
Claims (11)
A basalt fiber-based photocatalyst having a core / shell structure comprising a shell layer comprising an oxide represented by the following formula (1).
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
(b) immersing the basalt fiber of step (a) in a solution containing an oxide represented by the following formula (1); And
(c) annealing the basalt fiber of step (b)
≪ / RTI > wherein the photocatalyst comprises a core / shell structure.
[Chemical Formula 1]
ABO 3
(Wherein A is one kind of element selected from Pb, Ca, Ba and Sr, and B is one kind of element selected from Ti, Zr, Sn and Hf)
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| CN111117613A (en) * | 2019-12-17 | 2020-05-08 | 深圳先进技术研究院 | Basalt fiber-based photoelectric material and preparation method thereof |
| CN114836092A (en) * | 2022-04-19 | 2022-08-02 | 兴安盟石源玄武岩纤维工程技术研究院 | Preparation method of multi-purpose coating containing basalt fibers |
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2015
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| CN110252051A (en) * | 2019-05-27 | 2019-09-20 | 山东中琦环保设备制造有限公司 | A kind of boiler smoke dust-removal and desulfurizing denitration and the method for removing dioxin |
| CN110252051B (en) * | 2019-05-27 | 2020-11-17 | 山东中琦环保设备制造有限公司 | Method for dedusting, desulfurizing and denitrating boiler flue gas and removing dioxin |
| CN111117613A (en) * | 2019-12-17 | 2020-05-08 | 深圳先进技术研究院 | Basalt fiber-based photoelectric material and preparation method thereof |
| WO2021121298A1 (en) * | 2019-12-17 | 2021-06-24 | 深圳先进技术研究院 | Basalt fiber-based photoelectric material and preparation method therefor |
| CN111117613B (en) * | 2019-12-17 | 2021-07-30 | 深圳先进技术研究院 | Basalt fiber-based photoelectric material and preparation method thereof |
| CN114836092A (en) * | 2022-04-19 | 2022-08-02 | 兴安盟石源玄武岩纤维工程技术研究院 | Preparation method of multi-purpose coating containing basalt fibers |
| CN114836092B (en) * | 2022-04-19 | 2022-11-22 | 兴安盟石源玄武岩纤维工程技术研究院 | Preparation method of multi-purpose coating containing basalt fibers |
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