Preparation of amorphous RuS2 / MAPbBr3 photo-thermal catalyst and application of amorphous RuS2 / MAPbBr3 photo-thermal catalyst in catalysis of toluene oxidation

Abstract

The invention discloses preparation of an amorphous RuS2 / MAPbBr3 photo-thermal catalyst and application of the amorphous RuS2 / MAPbBr3 photo-thermal catalyst in catalysis of toluene oxidation. According to the method, ruthenium trichloride and a sulfur-containing chemical agent are used as raw materials to prepare the amorphous RuS2 nanoparticles. Then the composite material is prepared through a simple in-situ anti-solvent method, the process is simple, and the repeatability is high. The in-situ growth anti-solvent method can increase the contact area between MAPbBr3 and amorphous RuS2, is more beneficial to the generation and migration of carriers under the irradiation of visible light, reduces the recombination rate of electrons and holes, and improves the utilization rate of light energy. The prepared amorphous RuS2 has the performance of utilizing near-infrared light, and can convert near-infrared light energy into heat energy to play a role in local heating. The heating effect can increase the temperature of the reaction system, accelerate the migration of carriers to the surface of the catalyst, promote the surface reaction, and effectively improve the efficiency of the whole catalytic system.

Description

Technical Field

[0001] The present invention relates to a preparation technology of an environmental catalyst and its application field, and specifically to a preparation method of an amorphous RuS2 / MAPbBr3 photothermal catalyst and its application in photocatalytic aerobic oxidation of toluene. Background Art

[0002] Toluene is a very important chemical raw material, widely used in paints, coatings, adhesives and polymers. Its oxidation products, benzyl alcohol (BA) and benzaldehyde (BAD), are important chemical raw materials and synthetic intermediates, which can be widely used in the fields of pharmaceuticals, dyes, fragrances and food additives, and have higher economic value. 3 )-H bond activation and conversion into value-added products has always been a research hotspot in the field of modern chemical industry. 3 The high dissociation energy of the )-H bond makes it very inert in thermodynamics and kinetics. Traditional toluene oxidation technology is usually carried out under high temperature and high pressure conditions, and requires the use of toxic and expensive solvents. This traditional process is difficult to operate, energy-intensive and can cause secondary pollution. Therefore, it is necessary to develop a catalytic technology that is low in energy consumption, simple in process and highly efficient in the oxidation of toluene under mild conditions to meet environmental protection needs.

[0003] Traditional photocatalytic toluene oxidation has the problems of low light energy utilization, serious carrier recombination and inability to utilize near-infrared light, and thermal catalytic oxidation has the problems of complex process, high cost and high energy consumption. However, photothermal catalysis with solar energy as the only energy source avoids these problems. It can convert the captured near-infrared light into thermal energy, heat up the reaction system, accelerate the migration of electrons to the catalyst surface, promote the surface reaction, and thus increase the rate of the entire catalytic reaction system. Therefore, the use of this photothermal catalytic system can not only prepare high-value products benzyl alcohol and benzaldehyde, but also improve the conversion efficiency of toluene. The reaction formula is: 4C7H8+ 3O2→ 2C7H8O + 2C7H6O + 2H2O. At present, the catalysts for photocatalytic aerobic oxidation of toluene are mainly precious metal systems (Pt, Pd, Ag). These supported metal oxide catalysts can usually completely convert toluene under milder conditions, but the reserves of precious metals are small and expensive, which limits their application in catalytic toluene. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst and its application in view of the deficiencies of the prior art, so as to solve the problems in the prior art of low conversion rate of oxygen and toluene reaction and the need to add an external heat source for photothermal catalysis. The amorphous RuS2 / MAPbBr3 photothermal catalyst uses sunlight as a single energy source, uses part of the light energy for the generation of electrons and holes, and converts the other part of the light energy into heat energy to accelerate the migration of carriers to the catalyst surface, promotes the oxidation of toluene by oxygen on the catalyst surface, and thus effectively improves the efficiency of the catalytic system.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions: A method for preparing a photothermal catalyst in which amorphous RuS2 is in situ grown on the surface of perovskite MAPbBr3, comprising the following steps: (1) Weigh 4.34 mmol of ruthenium trichloride and dissolve it in an appropriate amount of deionized water to prepare a precursor solution of ruthenium with a certain concentration; (2) Weigh a certain amount of sulfur-containing precursor and dissolve it in 30 mL of deionized water, then add 1 mL of the ruthenium precursor solution in step (1) and stir at a certain temperature for 20 minutes; (3) Then, the suspension obtained in step (2) was transferred into a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and maintained at a certain temperature for 4 to 6 hours; (4) filtering, washing and drying the precipitate obtained in step (3) in an oven to obtain amorphous RuS2 nanoparticles; (5) Weigh 224 mg of methylammonium bromide and 734 mg of lead bromide, respectively, and dissolve them in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L; (6) Then, 0.5 mL of the two precursor solutions in step (5) are taken respectively, mixed evenly, and then added dropwise to an organic solvent containing a certain amount of amorphous RuS2 nanoparticles obtained in step (4), and stirred at room temperature for 0.5 to 2 hours; (7) The precipitate obtained in step (6) is filtered, washed and placed in an oven for drying to obtain the final amorphous RuS2 / MAPbBr3 photothermal catalyst.

[0006] Preferably, the concentration of the ruthenium precursor solution prepared in step (1) is 0.145-0.148 mol / L.

[0007] Preferably, the sulfur-containing precursor in step (2) is thiourea, sodium sulfide or sulfur, and the stirring temperature is 23-40°C.

[0008] Preferably, the hydrothermal temperature in step (3) is 180-200 °C.

[0009] Preferably, the drying temperature in step (4) is 50-80°C.

[0010] Preferably, the mass of the amorphous RuS2 nanoparticles used in step (6) is 10-40 mg, and the organic solvent is toluene or isopropanol.

[0011] Preferably, the detergent in step (7) is toluene, the washing times are 2 to 3 times, and the drying temperature is 50 to 80°C.

[0012] Preferably, the final product amorphous RuS2 / MAPbBr3 photothermal catalyst is a ground powder.

[0013] An application of the amorphous RuS2 / MAPbBr3 photothermal catalyst prepared by the above preparation method: used for photothermal catalytic aerobic oxidation of toluene to prepare benzyl alcohol and benzaldehyde.

[0014] Preferably, the reaction temperature for the photothermal catalytic aerobic oxidation of toluene is 25°C.

[0015] Preferably, the amount of the amorphous RuS2 / MAPbBr3 photothermal catalyst is 10 mg; the reaction atmosphere is O2; the reaction substrate components are: 2 mL acetonitrile, 1 mL toluene; the light source is a 300 W xenon lamp with a 400 nm cutoff filter.

[0016] The present invention has the following advantages and beneficial effects: 1. The amorphous RuS2 / MAPbBr3 photothermal catalyst prepared by the present invention can make full use of sunlight and convert near-infrared light into thermal energy. The generated thermal energy can increase the temperature of the reaction system, accelerate the migration of electrons to the catalyst surface, and promote the surface oxidation reaction. In addition, the preparation process is simple and the raw materials are cheap, so it has broad application prospects. 2. The amorphous RuS2 / MAPbBr3 photothermal catalyst synthesized by the present invention has a heterojunction between the two components, which provides sufficient contact area, is conducive to the efficient migration of carriers, and has good activity in the photocatalytic aerobic oxidation of toluene; 3. Perovskite MAPbBr3 is a good light-absorbing material with high carrier mobility, long carrier lifetime and adjustable band gap. Amorphous RuS2 nanoparticles have metal-like properties and can form an ohmic junction when in contact with the high work function semiconductor MAPbBr3, which promotes the transfer of electrons between RuS2 and MAPbBr3 and improves the efficiency of carrier separation. In addition, amorphous RuS2 has the ability to absorb and utilize near-infrared light, and can convert long-wavelength light into thermal energy to play a role in local heating. Under this heating effect, electrons are accelerated to transfer to the surface of the catalyst, promoting the oxidation of toluene by oxygen on the catalyst surface, thereby improving the catalytic efficiency of the reaction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 X-ray powder diffraction spectra of amorphous RuS2 / MAPbBr3 prepared in Examples 1 to 5 of the present invention and Comparative Example 1; Figure 2 The scanning electron microscope images of amorphous RuS2 / MAPbBr3 prepared in Examples 1 to 5 of the present invention and Comparative Example 1; Figure 3 X-ray photoelectron spectroscopy (XPS) graphs of amorphous 25% RuS2 / MAPbBr3 and MAPbBr3 prepared in Example 4 of the present invention and Comparative Example 1; Figure 4 The toluene oxidation activity diagram of amorphous RuS2 / MAPbBr3 prepared in Examples 1 to 5 of the present invention and Comparative Example 1; Figure 5 This is a temperature monitoring curve diagram of the reaction process of amorphous 25% RuS2 / MAPbBr3 and MAPbBr3 prepared in Example 4 of the present invention and Comparative Example 1. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail below in conjunction with embodiments and drawings. The examples described are further explanations of the present invention rather than limitations of the contents of the present invention.

[0019] Example 1 A method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst: 0.9 g (4.34 mmol) of ruthenium trichloride hydrate was weighed and dissolved in 31 mL of deionized water to prepare a ruthenium precursor solution with a concentration of 0.14 mol / L. 110 mg of thiourea was weighed and added to 30 mL of deionized water and stirred at 25 °C for 20 minutes, 1 mL of ruthenium precursor solution was added to the solution, and stirring was continued for 20 minutes. The above suspension was then transferred to a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and kept at 180 °C for 4 hours. Then, the obtained precipitate was filtered, washed and dried in a 50 °C oven, and amorphous RuS2 nanoparticles were obtained after grinding. Subsequently, 224 mg of methylammonium bromide and 734 mg of lead bromide were dissolved in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L. Then, 0.5 mL of the two precursor solutions were taken, mixed evenly, and then added dropwise to 10 mL of toluene solution containing 10.6 mg of amorphous RuS2 nanoparticles, and stirred at room temperature for 1.5 hours. The resulting precipitate was centrifuged, washed three times with toluene, dried at 50 ° C, and ground to obtain the final product, an amorphous RuS2 / MAPbBr3 photothermal catalyst, which was named 10% RuS2 / MAPbBr3.

[0020] Example 2 A method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst: 4.5 g (4.34 mmol) of ruthenium trichloride hydrate was weighed and dissolved in 29 mL of deionized water to prepare a ruthenium precursor solution with a concentration of 0.15 mol / L. 348 mg of sodium sulfide nonahydrate was weighed and added to 30 mL of deionized water and stirred at 25 °C for 20 minutes, 1 mL of ruthenium precursor solution was added to the solution, and stirring was continued for 20 minutes. The above suspension was then transferred to a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and kept at 180 °C for 5 hours. Then, the obtained precipitate was filtered, washed and dried in a 60 °C oven, and amorphous RuS2 nanoparticles were obtained after grinding. Subsequently, 224 mg of methylammonium bromide and 734 mg of lead bromide were dissolved in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L. Then, 0.5 mL of the two precursor solutions were taken, mixed evenly, and then added dropwise to 10 mL of toluene solution containing 15.9 mg of amorphous RuS2 nanoparticles, and stirred at room temperature for 0.5 hours. The resulting precipitate was centrifuged, washed three times with toluene, dried at 55 ° C, and ground to obtain the final product, an amorphous RuS2 / MAPbBr3 photothermal catalyst, which was named 15% RuS2 / MAPbBr3.

[0021] Example 3 A method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst: 4.5 g (4.34 mmol) of ruthenium trichloride hydrate was weighed and dissolved in 30 mL of deionized water to prepare a ruthenium precursor solution with a concentration of 0.145 mol / L. 46.5 mg of thiourea was weighed and added to 30 mL of deionized water and stirred at 23 °C for 20 minutes, 1 mL of ruthenium precursor solution was added to the solution, and stirring was continued for 20 minutes. The above suspension was then transferred to a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and kept at 190 °C for 6 hours. Then, the obtained precipitate was filtered, washed and placed in a 70 °C oven for drying, and amorphous RuS2 nanoparticles were obtained after grinding. Subsequently, 224 mg of methylammonium bromide and 734 mg of lead bromide were dissolved in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L. Then, 0.5 mL of the two precursor solutions were taken, mixed evenly, and then added dropwise to 10 mL of isopropanol solution containing 21.2 mg of amorphous RuS2 nanoparticles, and stirred at room temperature for 1 hour. The resulting precipitate was centrifuged, washed three times with isopropanol, dried at 50 ° C, and ground to obtain the final product, an amorphous RuS2 / MAPbBr3 photothermal catalyst, which was named 20% RuS2 / MAPbBr3.

[0022] Example 4 A method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst: 4.5 g (4.34 mmol) of ruthenium trichloride hydrate was weighed and dissolved in 29 mL of deionized water to prepare a ruthenium precursor solution with a concentration of 0.15 mol / L. 110 mg of thiourea was weighed and added to 30 mL of deionized water and stirred at 24 °C for 20 minutes, 1 mL of ruthenium precursor solution was added to the solution, and stirring was continued for 20 minutes. The above suspension was then transferred to a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and kept at 190 °C for 4 hours. Then, the obtained precipitate was filtered, washed and dried in a 60 °C oven, and amorphous RuS2 nanoparticles were obtained after grinding. Subsequently, 224 mg of methylammonium bromide and 734 mg of lead bromide were dissolved in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L. Then, 0.5 mL of the two precursor solutions were taken, mixed evenly, and then added dropwise to 10 mL of isopropanol solution containing 26.5 mg of amorphous RuS2 nanoparticles, and stirred at room temperature for 2 hours. The resulting precipitate was centrifuged, washed three times with isopropanol, dried at 50 ° C, and ground to obtain the final product, an amorphous RuS2 / MAPbBr3 photothermal catalyst, which was named 25% RuS2 / MAPbBr3.

[0023] Example 5 A method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst: 4.5 g (4.34 mmol) of ruthenium trichloride hydrate was weighed and dissolved in 30 mL of deionized water to prepare a ruthenium precursor solution with a concentration of 0.145 mol / L. 348 mg of sodium sulfide nonahydrate was weighed and added to 30 mL of deionized water and stirred at 25 °C for 20 minutes, 1 mL of ruthenium precursor solution was added to the solution, and stirring was continued for 20 minutes. The above suspension was then transferred to a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and kept at 200 °C for 5 hours. Then, the obtained precipitate was filtered, washed and dried in a 60 °C oven, and amorphous RuS2 nanoparticles were obtained after grinding. Subsequently, 224 mg of methylammonium bromide and 734 mg of lead bromide were dissolved in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L. Then, 0.5 mL of the two precursor solutions were taken, mixed evenly, and then added dropwise to 10 mL of toluene solution containing 31.8 mg of amorphous RuS2 nanoparticles, and stirred at room temperature for 1.5 hours. The resulting precipitate was centrifuged, washed three times with isopropanol, dried at 60 ° C, and ground to obtain the final product, an amorphous RuS2 / MAPbBr3 photothermal catalyst, which was named 30% RuS2 / MAPbBr3.

[0024] Comparative Example 1 A method for preparing a MAPbBr3 photothermal catalyst: 224 mg of methylammonium bromide and 734 mg of lead bromide were dissolved in 5 mL of N,N-dimethylformamide to prepare two precursor solutions with a concentration of 0.4 mol / L. Then, 0.5 mL of the two precursor solutions were taken respectively, mixed evenly, and added dropwise to 10 mL of toluene without amorphous RuS2 nanoparticles, and stirred at room temperature for 1 hour. The resulting precipitate was centrifuged, washed three times with toluene, dried at 60°C, and ground to obtain the final product, which was a MAPbBr3 photothermal catalyst and named MAPbBr3.

[0025] X-ray powder diffraction (XRD): The phase characterization of the samples was measured using Panalytical's X'pert pro powder diffractometer, with an X'celerator as the detector, a copper target (Cu Kα, λ = 0.154 nm) as the excitation radiation source, an operating voltage of 40 KV, and an operating current of 40 mA.

[0026] The morphology of the catalyst was observed by S-4800 field emission scanning electron microscope. The vacuum degree of the analysis chamber was less than 2.7×10 –6Pa, the scanning voltage and current were 5 kV and 7 μA respectively. The sample powder was glued to the conductive glue and then observed after gold spraying.

[0027] The temperature changes during the reaction were monitored by a Fotric 344 infrared camera, and the temperature curve was recorded and exported using the AnalyzIR software, while ensuring a stable working environment and good air circulation for the instrument.

[0028] Figure 1 The X-ray powder diffraction spectra of amorphous RuS2 / MAPbBr3 prepared in Examples 1 to 5 of the present invention and Comparative Example 1. As can be seen from the figure, the six samples all have five diffraction peaks at 14.9, 21.1, 30.1, 33.8, and 37.1°, which are respectively attributed to the five crystal planes (100), (110), (200), (210), and (211) of MAPbBr3. Since RuS2 is amorphous, its introduction does not change the diffraction peak position of MAPbBr3.

[0029] Figure 2 The SEM images of amorphous RuS2 / MAPbBr3 prepared in Comparative Example 1 (A), Example 1 (B), Example 2 (C), Example 3 (D), Example 4 (E) and Example 5 (F) of the present invention are shown. It can be seen from the figure that RuS2 is a nanoparticle and MAPbBr3 is a block morphology. In addition, RuS2 in the composite material sample is embedded in the surface of MAPbBr3, and the density of embedded RuS2 increases with the increase of the introduced amount.

[0030] Figure 3 The (XPS) graphs of 25% RuS2 / MAPbBr3 and MAPbBr3 prepared in Example 4 of the present invention and Comparative Example 1. As can be seen from the figure, the amorphous RuS2 / MAPbBr3 composite material was successfully prepared. It can be seen from the figure that the introduction of RuS2 can cause a positive shift in the binding energy of Ru 3d and S 2p, and a negative shift in the binding energy of Br 3d, Pb 4f, and N 1s, indicating that there is an electron transfer between RuS2 and MAPbBr3. Therefore, the introduction of RuS2 can adjust the charge distribution and further affect the photocatalytic reaction process.

[0031] Figure 4 The toluene oxidation activity of amorphous RuS2 / MAPbBr3 prepared in Examples 1 to 5 of the present invention and Comparative Example 1 is shown in the figure. It can be seen from the figure that 25% RuS2 / MAPbBr3 exhibits the best catalytic activity (BAD and BA yields are 3064 μmol g -1 h -1 and 389 μmol g -1 h -1), the yields of BAD and BA products of MAPbBr3 in comparative example 1 were increased by 24 and 13 times, respectively, indicating that the introduction of RuS2 can significantly improve the catalytic toluene performance of MAPbBr3.

[0032] Figure 5 The temperature monitoring curves of the reaction process of 25% RuS2 / MAPbBr3 and MAPbBr3 prepared in Example 4 of the present invention and Comparative Example 1 are shown in the figure. As shown in the figure, compared with MAPbBr3, 25% RuS2 / MAPbBr3 can cause the temperature of the reaction system to increase by an additional 10 °C, indicating that the addition of RuS2 can increase the temperature of the reaction system, showing a photothermal effect.

[0033] Photocatalytic toluene oxidation performance test: The RuS2 / MAPbBr3 prepared in Examples 1 to 5 and Comparative Example 1 was ground into powder for evaluation of toluene oxidation. The test conditions were as follows: the light source was a 300 W xenon lamp with a 400 nm cutoff filter; the amount of the amorphous RuS2 / MAPbBr3 photothermal catalyst was 10 mg; the reaction atmosphere was O2; the reaction substrate components were: 2 mL acetonitrile, 1 mL toluene.

[0034] In summary, the amorphous RuS2 / MAPbBr3 prepared by the present invention has different catalytic properties in the photocatalytic aerobic oxidation reaction of toluene, among which the 25% RuS2 / MAPbBr3 sample has the highest catalytic activity and has great application potential.

[0035] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing an amorphous RuS2 / MAPbBr3 photothermal catalyst, characterized in that: The following steps are involved: (1) Weigh 4.34 mmol of ruthenium trichloride and dissolve it in an appropriate amount of deionized water to prepare a precursor solution of ruthenium with a certain concentration; (2) Weigh a certain amount of sulfur-containing precursor and dissolve it in 30 mL of deionized water, then add 1 mL of the ruthenium precursor solution in step (1) and stir at a certain temperature for 20 minutes; (3) Then, the suspension obtained in step (2) was transferred into a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and maintained at a certain temperature for 4 to 6 hours; (4) filtering, washing and drying the precipitate obtained in step (3) in an oven to obtain amorphous RuS2 nanoparticles; (5) Weigh 224 mg of methylammonium bromide and 734 mg of lead bromide and dissolve them in 5 mL of N,N-dimethylformamide to prepare two precursor solutions; (6) Then, 0.5 mL of the two precursor solutions in step (5) were taken respectively, mixed evenly, and then added dropwise to an organic solvent containing a certain amount of amorphous RuS2 nanoparticles, and stirred at room temperature for 0.5 to 2 hours; (7) The precipitate obtained in step (6) is filtered, washed and placed in an oven for drying to obtain the final amorphous RuS2 / MAPbBr3 photothermal catalyst.

2. The method for preparing the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 1, characterized in that: The concentration of the ruthenium precursor solution prepared in step (1) is 0.14-0.15 mol / L.

3. The method for preparing the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 1, characterized in that: The sulfur-containing precursor in step (2) is thiourea, sodium sulfide or sulfur, and the stirring temperature is 23-40 °C.

4. The method for preparing the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 1, characterized in that: The reaction temperature in step (3) is 180-200 °C.

5. The method for preparing the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 1, characterized in that: In step (4), water is used for washing and the temperature used for drying is 50~80℃.

6. The method for preparing the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 1, characterized in that: The mass of amorphous RuS2 nanoparticles used in step (6) is 10-40 mg, and the organic solvent is toluene or isopropanol.

7. The method for preparing the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 1, characterized in that: The detergent in step (7) is toluene or isopropanol, the washing times are 2 to 3 times, and the drying temperature is 50 to 80 °C.

8. An amorphous RuS2 / MAPbBr3 photothermal catalyst prepared by the preparation method as described in any one of claims 1 to 7.

9. The use of the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 8, characterized in that: Used for photothermal catalytic aerobic oxidation of toluene to produce benzyl alcohol and benzaldehyde.

10. The use of the amorphous RuS2 / MAPbBr3 photothermal catalyst according to claim 9, characterized in that: When used for photothermal catalytic aerobic oxidation of toluene, the light source is a 300 W xenon lamp with a 400 nm cutoff filter; the reaction temperature is 25 °C; the raw gas composition is: 100% O2; the catalyst dosage is 10 mg; the reaction substrate components are: 2 mL acetonitrile, 1 mL toluene.

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