CN114433171A - Carbon dioxide reduction photocatalyst and preparation method and application thereof - Google Patents
Carbon dioxide reduction photocatalyst and preparation method and application thereof Download PDFInfo
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims abstract description 12
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- 239000002131 composite material Substances 0.000 claims description 11
- TXKAQZRUJUNDHI-UHFFFAOYSA-K bismuth tribromide Chemical group Br[Bi](Br)Br TXKAQZRUJUNDHI-UHFFFAOYSA-K 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 8
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- 238000011068 loading method Methods 0.000 claims description 4
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 44
- 238000006722 reduction reaction Methods 0.000 description 18
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- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/03—Catalysts comprising molecular sieves not having base-exchange properties
- B01J29/0308—Mesoporous materials not having base exchange properties, e.g. Si-MCM-41
- B01J29/0341—Mesoporous materials not having base exchange properties, e.g. Si-MCM-41 containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
-
- 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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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Abstract
The invention discloses a carbon dioxide reduction photocatalyst and a preparation method and application thereof, wherein the preparation method comprises the following steps: dissolving bismuth salt and cesium salt in dimethyl sulfoxide, adding molecular sieve, mixing, grinding, soaking, heating, and holding for a set time to form molecular sieve @ Cs3Bi2Br9And (c) a complex. Prepared molecular sieve @ Cs3Bi2Br9The photocatalyst has good photogenerated carrier separation and transfer efficiency, and can realize the photocatalytic reduction of CO under the irradiation of light2CO is produced with a yield of 5.62-25.4. mu. mol g‑1h‑1Photocatalytic reduction of CO in the gas phase compared to pure cesium bismuth bromide2The performance of CO generation is improved by 2.97-13.4 times.
Description
Technical Field
The invention belongs to the technical field of photocatalysts, and particularly relates to a molecular sieve @ Cs3Bi2Br9Compound and preparation method and application thereof, and the compound can be applied to photocatalysis CO in gas-solid phase2And (4) reducing.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
To alleviate global warming, a great deal of research effort is devoted to CO by using renewable energy sources2Reducing to produce high-value chemicals. Wherein the CO is photo-catalyzed2Reduction of CO that can be captured in the atmosphere2Using CO as raw material2Conversion to CO, being CO2Good routes to conversion and CO synthesis. However, the existing photocatalyst is mainly limited by low light conversion efficiency and cannot be well applied. The halide perovskite material has received wide attention due to its excellent optical properties, and is considered as a potential visible light photocatalytic material, but the lead-based halide perovskite material has a large microscopic size due to the high toxicity of lead, and the large microscopic size tends to bring a small specific surface area due to the property of the ionic crystal, which is not favorable for the adsorption of reactants on the surface of the catalyst, and meanwhile, the number of reaction sites is small, which is not favorable for the photocatalytic reaction. Furthermore, it is unstable in the aqueous phase.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a molecular sieve @ Cs3Bi2Br9A compound and a preparation method and application thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a molecular sieve @ Cs3Bi2Br9A method of preparing a composite comprising the steps of:
dissolving bismuth salt and cesium salt in organic solvent, adding molecular sieve, mixing, soaking, grinding to obtain molecular sieve powder, mixing with the solution, heating, and holding for a set time to obtain molecular sieve @ Cs3Bi2Br9And (c) a complex.
In a second aspect, the present invention provides a molecular sieve @ Cs3Bi2Br9The compound is prepared by the preparation method.
In a third aspect, the molecular sieve @ Cs3Bi2Br9Photocatalytic reduction of CO from complexes2The use of (1).
The beneficial effects achieved by one or more of the embodiments of the invention described above are as follows:
the photocatalyst is synthesized by a method of chemical dipping, grinding and heat preservation in an oven, and the preparation method is simple, mild in reaction condition, low in cost, capable of being prepared in a large scale and free of pollution, and has good application and industrialization values.
Prepared molecular sieve @ Cs3Bi2Br9The photocatalyst has good photogenerated carrier separation and transfer efficiency, and can realize the photocatalytic reduction of CO under the irradiation of light2CO is produced with a yield of 5.62-25.4. mu. mol g-1h-1Photocatalytic reduction of CO in the gas phase compared to pure cesium bismuth bromide2The performance of CO generation is improved by 2.97-13.4 times.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 shows the different Cs prepared in Experimental example 13Bi2Br9MCM-41 molecular sieve @ Cs in mass ratio3Bi2Br9An XRD pattern of the photocatalyst, wherein a is a large-angle XRD pattern, and b is a small-angle XRD pattern.
FIG. 2 shows the 50% mass ratio obtained in Experimental example 1Cs of (A)3Bi2Br9Other molecular sieves at ratios of loadings @ Cs3Bi2Br9The XRD patterns (including SBA-3, SBA-15 and MCM-48) of the photocatalyst are shown in the specification, wherein a, c and e are large-angle XRD patterns, and b, d and f are small-angle XRD patterns.
FIG. 3 shows MCM-41 molecular sieves @ Cs prepared in Experimental example 13Bi2Br9X-ray photoelectron spectroscopy (XPS) analysis of the photocatalyst, wherein a is XPS total spectrum; b is Cs 3d XPS spectra; c is Bi 4f XPS spectrum; d is Br 3d XPS spectrum.
FIG. 4 shows MCM-41 molecular sieves @ Cs prepared in Experimental example 13Bi2Br9High-angle annular dark field Scanning Transmission Electron Microscope (STEM) photo of photocatalyst, wherein the small particles are Cs3Bi2Br9。
FIG. 5 shows MCM-41 molecular sieves @ Cs prepared in Experimental example 13Bi2Br9Optical testing of the photocatalyst. Wherein a is MCM-41 molecular sieve @ Cs3Bi2Br9B is MCM-41 molecular sieve @ Cs3Bi2Br9The color of the sample.
FIG. 6 photo-catalytic CO of the product of example 12Reducing the performance graph; wherein a is MCM-41 molecular sieve @ Cs3Bi2Br9The gas yield of the photocatalyst is changed along with the time under different test conditions within 2h of reaction time; b is series MCM-41 molecular sieve @ Cs3Bi2Br9CO gas production rate of photocatalyst under visible light irradiation, c is 5 times of circulating photocatalytic experiment, d is13CO2MS diagram when used as gas source.
FIG. 7 shows the different molecular sieves @ Cs of the product of example 13Bi2Br9Photocatalytic CO2Reduction performance diagram.
FIG. 8 is the MCM-41 molecular sieves @ Cs in the product of example 13Bi2Br9CO with product of comparative example 12-TPD spectra.
FIG. 9 shows the MCM-41 molecular sieves @ Cs product of example 13Bi2Br9In the photocatalysis of CO2In situ Red in reduction ProcessExo (FT-IR) spectra, and MCM-41 molecular sieves @ Cs3Bi2Br9And pure Cs3Bi2Br9PL and TRPL spectra of (a). Wherein a is MCM-41 molecular sieve @ Cs3Bi2Br9Introducing CO in the dark2B is MCM-41 molecular sieve @ Cs after the in-situ pool is sealed3Bi2Br9In-situ infrared spectrum under the illumination condition, c is MCM-41 molecular sieve @ Cs3Bi2Br9And pure Cs3Bi2Br9Fluorescence emission spectrum of the photocatalyst, wherein d is MCM-41 molecular sieve @ Cs3Bi2Br9And pure Cs3Bi2Br9Steady state fluorescence spectrum of the photocatalyst.
FIG. 10 shows the MCM-41 molecular sieves @ Cs product of example 13Bi2Br9Schematic representation of the preparation process.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As described in the background of the invention, the prior art has the problems of toxicity, large particle size and easy decomposition of visible water of a single lead halide-containing perovskite, and the invention provides the following technical solutions in order to solve the above problems.
In a first aspect, the present invention provides a molecular sieve @ Cs3Bi2Br9A method of preparing a composite comprising the steps of:
dissolving bismuth salt and cesium salt in organic solvent, adding molecular sieve, mixing, soaking, grinding to obtain molecular sieve powder, mixing with the solution, heating, and holding for a set time to obtain molecular sieve @ Cs3Bi2Br9And (c) a complex.
The molecular sieve is used as a substrate material, and the pore channels of the molecular sieve can be used for limiting the growth of perovskite and increasing reaction sites. In addition, molecular sieves can increase photocatalysisSpecific surface area of the agent, increase of CO2Promote the separation and transfer of photon-generated carriers and reduce CO2Reduced activation energy barrier, thereby improving photocatalytic performance.
In some embodiments, the organic solvent is dimethyl sulfoxide or N, N-dimethylformamide. The corresponding bromide solution can be dissolved.
In some embodiments, the molecular sieve @ Cs3Bi2Br9In complex, Cs3Bi2Br9The amount of the supported group (b) is 10% to 60%, preferably 45% to 55%, and more preferably 50%. Too much loading results in a decrease in catalytic activity.
Preferably, the molar ratio of bismuth salt to cesium salt is 1.8-2.5: 2.5 to 3.5, more preferably 2: 3.
preferably, the bismuth salt is bismuth bromide (since the perovskite material is Cs)3Bi2Br9So the corresponding salt is the bromide of bismuth, i.e. bismuth bromide).
Preferably, the cesium salt is cesium bromide (since the perovskite material is Cs)3Bi2Br9So the corresponding salt is the bromide of cesium, i.e. cesium bromide).
In some embodiments, the time of milling is 20-40 min. The particle size of the molecular sieve itself does not change significantly during the milling process, which is only to allow the molecular sieve and the solution to mix thoroughly.
In some embodiments, the heating and heat preservation temperature is 150-; similarly, too long a holding time may affect the state of the perovskite. Preferably, the temperature for heating and heat preservation is 155 ℃, and the time for heating and heat preservation is 12 h.
During the heating and heat preservation process, the precursor liquid can be converted into cesium bismuth bromide (Cs) of the non-lead perovskite3Bi2Br9)。
In a second aspect, the present invention provides a molecular sieve @ Cs3Bi2Br9The compound is prepared by the preparation method.
In a third aspect, the molecular sieve @ Cs3Bi2Br9Photocatalytic reduction of CO from complexes2The use of (1).
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described in detail below with reference to specific examples and comparative examples.
The test materials used in the following examples are all conventional in the art and are commercially available.
Example 1
A visible light photocatalyst for photocatalytic carbon dioxide reduction and a preparation method thereof comprise the following steps:
(1) under the assistance of ultrasound, a certain amount of bismuth bromide (BiBr)3) And an amount of cesium bromide (CsBr) dissolved in 500. mu.L of dimethyl sulfoxide.
(2) The resulting solution was added to a mortar containing 250mg of MCM-41 molecular sieve powder and ground for 30 min.
(3) Putting the ground mortar into an oven, and preserving heat at 155 ℃ for 12h to obtain the MCM-41 molecular sieve @ Cs3Bi2Br9A photocatalyst. Can carry out photocatalysis on CO2And (4) carrying out reduction reaction.
(4) By varying the bismuth bromide (BiBr) added3) And cesium bromide (CsBr), namely, dissolving 12mg of cesium bromide and 16.8mg of bismuth bromide in 500 microliters of dimethyl sulfoxide, grinding and mixing the cesium bromide and 250mg of MCM-41 molecular sieve powder fully, and then preserving the heat at 155 ℃ for 12 hours to obtain the MCM-41 molecular sieve @ Cs with the mass fraction of 10%3Bi2Br9；
Dissolving 24mg of cesium bromide and 33.6mg of bismuth bromide in 500 microliters of dimethyl sulfoxide, grinding and mixing the cesium bromide and 250mg of MCM-41 molecular sieve powder fully, and keeping the temperature at 155 ℃ for 12 hours to obtain the MCM-41 molecular sieve @ Cs with the mass fraction of 20%3Bi2Br9；
By analogy, MCM-41 molecular sieves @ Cs with different mass fractions can be obtained3Bi2Br9。
MCM-41 was treated in the same mannerThe molecular sieve is replaced by SBA-3, SBA-15 and MCM-48 molecular sieves, and a series of molecular sieves @ Cs can be synthesized3Bi2Br9The photocatalyst, taking SBA-3 molecular sieve as an example, 60mg of cesium bromide and 84mg of bismuth bromide are dissolved in 500 microliters of dimethyl sulfoxide, are fully ground and mixed with 250mg of SBA-3 molecular sieve powder, and then are kept at 155 ℃ for 12 hours to obtain the SBA-3 molecular sieve @ Cs with the mass fraction of 50%3Bi2Br9。
Photocatalytic CO2Reduction test
1. The test method comprises the following steps:
photocatalytic CO catalysis was carried out at atmospheric pressure using a self-made cylindrical quartz reactor (volume 45mL)2And (4) carrying out reduction experiments. Before the photoreaction, 5mg of the photocatalyst was uniformly dispersed into a round cap having a diameter of 2.5cm, and the original form containing the photocatalyst was put into the reactor. 500 microliter of water was dropped out of the dome and the reactor was sealed with a quartz lid. Before the reaction, the flow rate is 10mL min-1High purity CO of2The air in the reactor was vented. The reactor was connected to circulating cooling water to maintain the reaction at 20 ℃ and avoid changes in yield due to excessive temperatures. Using a 300W xenon lamp equipped with a visible light filter as a light source, 0.5mL of gas was extracted from the reactor with a sampling needle after 2 hours of light irradiation, and analyzed by an online gas chromatograph equipped with a Flame Ionization Detector (FID).
2. And (3) test results:
CBB in each figure means Cs3Bi2Br9。
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9The XRD pattern of the photocatalyst is shown in figure 1, and it can be seen that in the composite material, MCM-41 molecular sieve @ Cs3Bi2Br9The shape and position of the characteristic peak of (1) and Cs3Bi2Br9The XRD spectra of the standard cards matched well. In addition, the small-angle XRD pattern shows that the structure of the MCM-41 molecular sieve is not changed in the process of growing the perovskite in a limited area.
Example 1 product other molecular sieves @ Cs3Bi2Br9The XRD pattern of the photocatalyst is shown in figure 2,it can be seen that SBA-3, SBA-15 and MCM-48 molecular sieve have Cs with limited growth3Bi2Br9The positions of the characteristic peaks of the nanoparticles are all equal to Cs3Bi2Br9The XRD spectra of the standard cards matched well. The small angle XRD pattern also shows that the structure of the molecular sieve is not changed in the process of limited domain growth.
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9The XPS spectrum of the photocatalyst is shown in figure 3. XPS characterization further investigated chemical states and sample composition. The binding energy positions of the element peaks are consistent with those in the literature, and the combination of XRD results shows that the sample photocatalyst is successfully synthesized.
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9A high angle annular dark field Scanning Transmission Electron Microscope (STEM) photograph of the photocatalyst is shown in fig. 4. Wherein the small particles are non-lead perovskite Cs3Bi2Br9。
Product MCM-41 molecular sieve @ Cs3Bi2Br9Optical testing of the photocatalyst is shown in FIG. 5, where it can be seen that the comparison is with pure Cs3Bi2Br9MCM-41 molecular sieve @ Cs3Bi2Br9The absorption edge of the photocatalyst appears blue-shifted, and as the loading ratio increases, the light absorption gradually increases due to the quantum size effect. Evidence of Cs3Bi2Br9The limited domain grows in the MCM-41 molecular sieve, and a sample photo is shown in FIG. 5, and the depth of the color of the sample is continuously deepened.
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9Photocatalytic CO of photocatalyst2The activity of reduction is shown in FIG. 6, and comparative experiments can show that CO production is driven by a photocatalytic reaction (FIG. 6a), and MCM-41 molecular sieve @ Cs is irradiated by visible light3Bi2Br9CO of photocatalyst2Reduction ability compared to initial Cs3Bi2Br9Has a great improvement on Cs3Bi2Br9The performance is best when the sexual mass fraction is 50%, and the production rate of CO is 17.24 mu mol g-1h-1Is the initial Cs3Bi2Br99 times higher (fig. 6 b). The stability can be used to characterize the practical application potential of the photocatalyst, and after 5 cycle stability experiments (fig. 6c), the activity of the photocatalyst hardly decreases, indicating that the photocatalyst is stable during the water splitting experiment. Isotope tests further verify that the carbon source in the CO in the product is derived from CO2(FIG. 6 d).
Different molecular sieves @ Cs3Bi2Br9Photocatalytic CO of photocatalyst2The performance of the reduction is shown in FIG. 7, with Cs grown in the confined regions of the SBA-3, SBA-15 and MCM-48 molecular sieves3Bi2Br9All to CO2The reduction performance is improved to a certain extent, and the method is proved to have certain universality.
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9Photocatalyst comparative Cs3Bi2Br9CO of2The TPD spectrum is shown in FIG. 8. The active site for photocatalytic CO2 reduction can be evaluated by the total area under each desorption peak curve. MCM-41 molecular sieve @ Cs3Bi2Br9The peak area of the photocatalyst is larger than Cs3Bi2Br9Prove that the MCM-41 molecular sieve @ Cs3Bi2Br9Can obviously improve CO2The adsorption capacity of (1). This favors photocatalytic CO2And (4) reduction process. Meanwhile, MCM-41 molecular sieve @ Cs3Bi2Br9The desorption temperature of the photocatalyst is shifted to a high temperature, indicating that CO is present2Molecule and MCM-41 molecular sieve @ Cs3Bi2Br9The binding of the photocatalyst is stronger. Due to this strong interaction, CO is photocatalyzed2The activation energy barrier for the reduction is then lowered.
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9Photocatalyst for photocatalytic CO2In situ Infrared (FT-IR) Spectroscopy in the reduction Process MCM-41 molecular sieves @ Cs3Bi2Br9And pure Cs3Bi2Br9The PL and TRPL profiles of (A) and (B) are shown in FIG. 9. It can be seen that the adsorption of CO2 during the adsorption of CO2Species mainly comprising bidentate carbonates (b-CO)3 2-) And bicarbonate (HCO)3 -) (FIG. 9 a). In the photocatalysis process, the main intermediate is monodentate carbonate m-CO3 2-And formate (— COOH) (fig. 9 b). As shown in FIG. 9c, MCM-41 molecular sieves @ Cs3Bi2Br9PL emission peak intensity and Cs of photocatalyst3Bi2Br9The comparison is obviously weakened, which indicates that the recombination rate of photogenerated electrons and holes is reduced. In FIG. 6d the Time Resolved Photoluminescence (TRPL) spectra were studied using a tri-exponential function to fit the decay curve, MCM-41 molecular sieves @ Cs3Bi2Br9τ of 5.274ns, in comparison with Cs3Bi2Br9(2.038ns) is significantly improved, and an increase in the average PL lifetime indicates a molecular sieve-restricted Cs3Bi2Br9Has longer carrier life, and is beneficial to the photocatalytic reaction.
EXAMPLE 1 product MCM-41 molecular sieves @ Cs3Bi2Br9The schematic synthesis of the photocatalyst is shown in FIG. 10.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Molecular sieve @ Cs3Bi2Br9A method of preparing a composite, comprising: the method comprises the following steps:
dissolving bismuth salt and cesium salt in organic solvent, adding molecular sieve, mixing, soaking, grinding to obtain molecular sieve powder, mixing with the solution, heating, and holding for a set time to obtain molecular sieve @ Cs3Bi2Br9And (c) a complex.
2. The molecular sieve @ Cs of claim 13Bi2Br9Preparation of the ComplexThe method is characterized in that: the organic solvent is dimethyl sulfoxide or N, N-dimethylformamide;
preferably, said molecular sieve @ Cs3Bi2Br9In complex, Cs3Bi2Br9The loading amount of the catalyst is 10-60%.
3. The molecular sieve @ Cs of claim 13Bi2Br9A method of preparing a composite, comprising: the molecular sieve @ Cs3Bi2Br9In complex, Cs3Bi2Br9The loading amount of (A) is 45-55%, preferably 50%.
4. The molecular sieve @ Cs of claim 13Bi2Br9A method of preparing a composite, comprising: the molar ratio of the bismuth salt to the cesium salt is 1.8-2.5: 2.5 to 3.5, more preferably 2: 3.
5. the molecular sieve @ Cs of claim 43Bi2Br9A method of preparing a composite, comprising: the bismuth salt is bismuth bromide.
6. The molecular sieve @ Cs of claim 43Bi2Br9A method of preparing a composite, comprising: the cesium salt is cesium bromide.
7. The molecular sieve @ Cs of claim 13Bi2Br9A method of preparing a composite, comprising: the grinding time is 20-40 min.
8. The molecular sieve @ Cs of claim 13Bi2Br9A method of preparing a composite, comprising: the heating and heat preservation temperature is 150-;
preferably, the temperature for heating and heat preservation is 155 ℃, and the time for heating and heat preservation is 12 h.
9. Molecular sieve @ Cs3Bi2Br9A composite, characterized by: prepared by the preparation method of any one of claims 1 to 8.
10. The molecular sieve @ Cs of claim 93Bi2Br9Photocatalytic reduction of CO from complexes2The use of (1).
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| CN116371452A (en) * | 2023-04-19 | 2023-07-04 | 上海应用技术大学 | Efficient CO adsorption and reduction 2 Cs of (2) 2 CuBr 4 Photocatalyst |
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