A NiSe 0.4 S 1.6 Composite catalyst of NiSe / MgIn2S4, preparation method and application thereof

Abstract

The application belongs to the field of piezoelectric photocatalysts, and particularly relates to a NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst, a preparation method and application thereof. The application is mainly based on MgIn2S4, supplemented with NiSe 0.4 S 1.6 , and a heterojunction structure is formed by using an impregnation method to prepare the NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst. The catalyst can efficiently produce hydrogen under the combined action of piezoelectric catalysis and photocatalysis. The catalyst synthesis method is simple, easy to operate, harmless to the environment, and the prepared catalyst has high activity and excellent stability, and will not cause secondary pollution and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of piezoelectric photocatalysis, and particularly relates to a NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst, a preparation method and application thereof. BACKGROUND

[0002] Under the challenges of energy crisis and environmental pollution, it is increasingly necessary to develop and utilize clean energy to solve the imminent fuel problem. The photocatalytic hydrogen evolution process can collect a large amount of clean solar energy and convert it into hydrogen energy, which is considered as a promising technology and can be used as a reliable clean energy source for human beings. In the field of photocatalysis, a variety of photocatalysts have been found, such as metal sulfides, metal oxides, etc. MgIn2S4 has unique photocatalytic performance and optimal band gap for effective absorption of visible light, and is a unique photocatalytic material. However, the rapid recombination of photo-generated carriers and the serious photo-corrosion phenomenon limit the large-scale application of MgIn2S4. Patent CN117181253A discloses a H3PMo 12 O 40 / MgIn2S4 composite photocatalyst and a preparation method thereof. The prepared catalyst reduces the recombination rate of photo-generated electrons and holes, and improves the quantum efficiency and photocatalytic activity. However, the preparation method of the above-mentioned catalyst is relatively complex and not easy to operate. SUMMARY

[0003] The application aims to provide a NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst, which is used for piezoelectric photocatalytic H2 production and has higher catalytic activity and corrosion resistance.

[0004] The NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst provided by the application has the advantages of high catalytic activity, corrosion resistance, and the like.

[0005] (1) Preparation of MgIn2S4:

[0006] MgCl2.6H2O and InCl3.4H2O are dissolved in ethylene glycol, and ultrasonic treatment is performed for 30 min to make them fully dissolved. Then C2H5NS is added, and stirring is performed for 30 min. Then the reaction kettle with a polytetrafluoroethylene lining is transferred to a stainless steel reaction kettle, and the reaction kettle is placed in an oven at 180 DEG C for 12 h. After cooling to room temperature, filtration is performed, and the solid in the reaction kettle is washed with deionized water and anhydrous ethanol for three times. Drying is performed at 60 DEG C overnight to obtain yellow MgIn2S4.

[0007] Furthermore, the molar ratio of MgCl2·6H2O and InCl3·4H2O is 1:2; the mass ratio of C2H5NS and MgCl2·6H2O is 0.30052:0.10165.

[0008] (2) NiSe 0.4 S 1.6 Preparation:

[0009] Ni(NO3)2·6H2O and urea were dispersed in water and ethylene glycol and sonicated for 15 min to ensure uniform dispersion. The mixture was then transferred to a stainless steel reactor with a PTFE liner and placed in an oven at 150°C for 4 h. After the reaction, the solid in the reactor was filtered, washed three times with deionized water and anhydrous ethanol, and vacuum-dried overnight at 60°C to obtain bright green Ni3(NO3)2(OH)4. Next, sulfur powder, selenium powder, and NaBH4 were dissolved in water at 70°C. After cooling to room temperature, Ni3(NO3)2(OH)4 was added, and the mixture was stirred vigorously for 10 min. The mixture was then transferred to a PTFE-lined reactor and placed in an oven at 180°C for 12 h. After the reaction, the mixture was allowed to cool naturally to room temperature. The solid in the reactor was filtered, centrifuged, washed, and dried overnight at 60°C to obtain black NiSe. 0.4 S 1.6 .

[0010] Furthermore, the molar ratio of Ni(NO3)2·6H2O to urea is 0.894:1.665; the mass ratio of sulfur powder, selenium powder, NaBH4 and Ni3(NO3)2(OH)4 is 3:1:2:2.

[0011] Furthermore, the volume ratio of water to ethylene glycol in the water and ethylene glycol mixed solution is 12:8.

[0012] (3) NiSe 0.4 S 1.6 Preparation of MgIn2S4 composite catalyst:

[0013] MgIn2S4, NiSe 0.4 S 1.6 The catalyst was dissolved in a solvent, subjected to ultrasonication and stirring, followed by filtration, washing, and drying to obtain a green powder, which is NiSe. 0.4 S 1.6 / MgIn2S4 composite catalyst.

[0014] The solvent is: anhydrous ethanol, deionized water, or a mixture of anhydrous ethanol and water; the volume ratio of anhydrous ethanol to deionized water in the mixture of anhydrous ethanol and deionized water is 1:1-4.

[0015] Furthermore, the NiSe0.4 S 1.6 The amount of the added MgIn2S4 is 6-12% of the mass of MgIn2S4, preferably 6-10%.

[0016] The ultrasonic power is 240W, the ultrasonic time is 30min, the stirring speed is 400r / min, and the stirring time is 24h.

[0017] The composite catalyst prepared by the above method is applied to piezophotocatalytic H2 production, and the specific operation steps are as follows: firstly, NiSe 0.4 S 1.6 The MgIn2S4 composite catalyst is uniformly dispersed in water, then a sacrificial agent is added, and finally nitrogen is introduced and sealed, and H2 is produced under the combined action of light and ultrasonic waves.

[0018] Further, the ultrasonic power is 240W; the light uses 55W xenon lamp simulated sunlight.

[0019] Further, the amount of the NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst is 2mg / 18mL.

[0020] Further, the sacrificial agent includes one of triethanolamine, a mixed solution of 0.35M Na2S and 0.25M Na2SO3, anhydrous ethanol, and lactic acid; preferably triethanolamine.

[0021] The advantages of the present application are as follows:

[0022] (1) The present application uses MgIn2S4 as the main component, supplemented by NiSe 0.4 S 1.6 , and a heterojunction structure is formed by compounding, so that the NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst is prepared, so that the catalytic activity of MgIn2S4 is improved, and hydrogen can be efficiently produced under the combined action of piezocatalysis and photocatalysis. 0.4 S 1.6 The composite catalyst prepared under the condition that the mass of NiSe 0.4 S 1.6 is 8% of the mass of MgIn2S4 has the best effect, reaches 976.34umol / (g·h), and the hydrogen production efficiency is 7.58 times that of MgIn2S4 and 22.93 times that of NiSe 0.4 S 1.6 .

[0023] (2) The NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst prepared by the present application has good corrosion resistance and stability, and the hydrogen production efficiency does not decrease significantly after 4 cycles of testing.

[0024] (3) NiSe 0.4 S 1.6 The introduction of NiSe 0.4 S 1.6 only deposited on the surface of MgIn2S4, and the obtained NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst has high crystallinity and high purity.

[0025] (4) The NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst synthesized by the impregnation method of the present application has simple synthesis method, easy operation, no harm to the environment, energy saving and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 SEM image of the catalyst synthesized in Example 1;

[0027] Figure 2 XRD pattern of the catalyst synthesized in Examples 1-4 and Comparative Examples 3-4;

[0028] Figure 3 H2 production performance graph of the catalyst synthesized in Examples 1-4 and Comparative Examples 3-4 under the synergistic effect of piezoelectricity and light;

[0029] Figure 4 H2 production performance graph of the catalyst synthesized in Examples 1-4 and Comparative Examples 3-4 under only piezoelectricity condition;

[0030] Figure 5 H2 production performance graph of the catalyst synthesized in Examples 1-4 and Comparative Examples 3-4 under only light condition;

[0031] Figure 6 H2 production performance graph of Examples 1 and Examples 8-10 under the synergistic effect of piezoelectricity and light;

[0032] Figure 7 H2 production performance graph of the catalyst synthesized in Example 1 for 4 cycles. 0.4 S 1.6 / MgIn2S4 composite catalyst. DETAILED DESCRIPTION

[0033] The present application is not limited to the specific embodiments, and those skilled in the art can adopt other various embodiments according to the disclosure of the present application, or make simple changes or modifications using the design structure and ideas of the present application, which fall within the protection scope of the present application. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] The H2 production efficiency is calculated according to the following formula:

[0035]

[0036] R: H2 production rate, unit: pmol / (g·h), V: hydrogen volume, unit: pL, m: catalyst mass, unit: g, t: reaction time, unit: h.

[0037] Example 1:

[0038] (1) First, 0.10165 g of MgCl2·6H2O and 0.29324 g of InCl3·4H2O were dissolved in 70 mL of ethylene glycol, and ultrasonic treatment was performed for 30 min. Then, 0.30052 g of C2H5NS was added, and stirring was performed for 30 min. Finally, the mixed solution was transferred to a reaction kettle with a polytetrafluoroethylene liner, and was placed in an oven at 180°C for 12 h. After the reaction was completed, the solid in the reaction kettle was naturally cooled to room temperature, washed with deionized water and anhydrous ethanol three times, and dried at 60°C overnight to obtain yellow MgIn2S4.

[0039] (2) 0.26 g of Ni(NO3)2·6H2O and 0.1 g of urea were dispersed in a mixed solution of 12 mL of water and 8 mL of ethylene glycol, and ultrasonic treatment was performed for 15 min to make them uniformly dispersed. Then, the mixture was transferred to a stainless steel reaction kettle with a polytetrafluoroethylene liner, and was placed in an oven at 150°C for 4 h. After the reaction was completed, the solid in the reaction kettle was filtered, washed with deionized water and anhydrous ethanol three times, and vacuum dried at 60°C overnight to obtain bright green Ni3(NO3)2(OH)4. Then, 0.09 g of sulfur powder, 0.03 g of selenium powder and 0.06 g of NaBH4 were dissolved in 70°C 28 mL of water, and the mixture was cooled to room temperature. Then, 0.06 g of Ni3(NO3)2(OH)4 was added, and stirring was performed for 10 min. Then, the mixture was transferred to a reaction kettle with a polytetrafluoroethylene liner, and was placed in an oven at 180°C for 12 h. After the reaction was completed, the solid in the reaction kettle was naturally cooled to room temperature, filtered and centrifuged, and washed. The solid was dried at 60°C overnight to obtain black NiSe 0.4 S 1.6 .

[0040] (3) MgIn2S4, NiSe 0.4 S 1.6Dissolved in a mixture of 8 mL deionized water and 2 mL anhydrous ethanol, the solution was sonicated for 30 min (240 W) and stirred for 24 h (400 r / min). After filtration, washing, and drying, a green powder was obtained, which is NiSe. 0.4 S 1.6 / MgIn2S4 composite catalyst, denoted as 8% NiSe 0.4 S 1.6 / MgIn2S4. Wherein, NiSe 0.4 S 1.6 The mass is 8% of the mass of MgIn2S4.

[0041] The 8% NiSe obtained in Example 1 0.4 S 1.6 / MgIn2S4 is used in piezoelectric photocatalytic H2 production:

[0042] 2 mg 8% NiSe 0.4 S 1.6 MgIn₂S₄ was added to 18 mL of water and ultrasonically dispersed for 30 min to ensure uniform dispersion of the composite catalyst. Then, 2 mL of sacrificial triethanolamine was added, followed by N₂ purging for 30 min. Finally, the mixture was sealed for 2 h under 240 W ultrasonication and 55 W xenon lamp simulated sunlight. After the experiment, 0.5 mL of gas was extracted from the tube, and the peak area was detected using a gas chromatograph to calculate the H₂ production rate, which was found to be 976.34 μmol / (g·h).

[0043] Example 2:

[0044] Compared with Example 1, the difference is that in step (3), NiSe is added. 0.4 S 1.6 The mass of the catalyst was 6% of the mass of MgIn2S4, and other parameters were the same as in Example 1. The resulting composite catalyst was designated as 6% NiSe. 0.4 S 1.6 / MgIn2S4.

[0045] The 6% NiSe obtained in Example 2 0.4 S 1.6 / MgIn2S4 was applied to piezoelectric photocatalytic H2 production, using the same method as in Example 1, and the calculated H2 production rate was 765.60 μmol / (g·h).

[0046] Example 3:

[0047] Compared with Example 1, the difference is that in step (3), NiSe is added. 0.4 S 1.6 The mass of the catalyst was 10% of that of MgIn2S4, and other parameters were the same as in Example 1. The resulting composite catalyst was designated as 10% NiSe.0.4 S 1.6 / MgIn2S4.

[0048] The 10% NiSe obtained in Example 2 0.4 S 1.6 / MgIn2S4 was applied to piezoelectric photocatalytic H2 production, using the same method as in Example 1, and the calculated H2 production rate was 704.29 μmol / (g·h).

[0049] Example 4:

[0050] Compared with Example 1, the difference is that in step (3), NiSe is added. 0.4 S 1.6 The mass of the catalyst was 12% of the mass of MgIn2S4, and other parameters were the same as in Example 1. The resulting composite catalyst was designated as 12% NiSe. 0.4 S 1.6 / MgIn2S4.

[0051] The 12% NiSe obtained in Example 2 0.4 S 1.6 / MgIn2S4 was applied to piezoelectric photocatalytic H2 production, using the same method as in Example 1, and the calculated H2 production rate was 446.88 μmol / (g·h).

[0052] Example 5:

[0053] Compared with Example 1, the difference is that in step (3), MgIn2S4 and NiSe are... 0.4 S 1.6 Dissolve in 10 mL of anhydrous ethanol, otherwise as in Example 1.

[0054] The 8% NiSe obtained in Example 5 0.4 S 1.6 / MgIn2S4 was applied to piezoelectric photocatalytic H2 production, using the same method as in Example 1, and the calculated H2 production rate was 305.91 μmol / (g·h).

[0055] Example 6:

[0056] Compared with Example 1, the difference is that in step (3), MgIn2S4 and NiSe are... 0.4 S 1.6 Dissolve in 10 mL of water, otherwise as in Example 1.

[0057] The 8% NiSe obtained in Example 6 0.4 S 1.6 / MgIn2S4 was applied to piezoelectric photocatalytic H2 production, using the same method as in Example 1, and the calculated H2 production rate was 538.58 μmol / (g·h).

[0058] Example 7:

[0059] The difference between Example 1 and Example 7 is that in step (3), MgIn2S4 and NiSe 0.4 S 1.6 are dissolved in 5 mL water and 5 mL anhydrous ethanol, and the rest is the same as Example 1.

[0060] The 8% NiSe 0.4 S 1.6 / MgIn2S4 obtained in Example 7 is applied to piezophotocatalytic H2 production, and the method is the same as Example 1. The calculated H2 production rate is 445.74 μmol / (g·h).

[0061] Example 8:

[0062] The difference between Example 1 and Example 8 is that the sacrificial agent is changed to a mixed solution of 2 mL of 0.35 M Na2S and 0.25 M Na2SO3, and the rest is the same as Example 1.

[0063] The 8% NiSe 0.4 S 1.6 / MgIn2S4 obtained in Example 8 is applied to piezophotocatalytic H2 production, and the method is the same as Example 1. The calculated H2 production rate is 76.96 μmol / (g·h).

[0064] Example 9:

[0065] The difference between Example 1 and Example 9 is that the sacrificial agent is changed to anhydrous ethanol, and the rest is the same as Example 1.

[0066] The 8% NiSe 0.4 S 1.6 / MgIn2S4 obtained in Example 9 is applied to piezophotocatalytic H2 production, and the method is the same as Example 1. The calculated H2 production rate is 584.32 μmol / (g·h).

[0067] Example 10:

[0068] The difference between Example 1 and Example 10 is that the sacrificial agent is changed to lactic acid, and the rest is the same as Example 1.

[0069] The 8% NiSe 0.4 S 1.6 / MgIn2S4 obtained in Example 10 is applied to piezophotocatalytic H2 production, and the method is the same as Example 1. The calculated H2 production rate is 146.12 μmol / (g·h).

[0070] Comparative Example 1:

[0071] Compared with Example 1, the difference is that in the application method, 240W ultrasonic and 55W xenon lamp simulated sunlight irradiation are replaced by only 240W ultrasonic, and other conditions are the same as those in Example 1, 8% NiSe 0.4 S 1.6 The H2 production rate of the MgIn2S4 composite catalyst is 403.48 μmol / (g·h).

[0072] Comparative Example 2:

[0073] Compared with Example 1, the difference is that in the application method, 240W ultrasonic and 55W xenon lamp simulated sunlight irradiation are replaced by only 55W xenon lamp simulated sunlight irradiation, and other conditions are the same as those in Example 1, 8% NiSe 0.4 S 1.6 The H2 production rate of the MgIn2S4 composite catalyst is 180.21 μmol / (g·h).

[0074] Comparative Example 3:

[0075] Dissolve 0.10165 g of MgCl2·6H2O and 0.29324 g of InCl3·4H2O in 70 mL of ethylene glycol, and ultrasonically treat for 30 min. Then add 0.30052 g of C2H5NS, stir for 30 min, and then transfer to a reaction kettle with a polytetrafluoroethylene lining, and place in an oven at 180°C for 12 h. After the reaction is completed, allow to cool to room temperature naturally, wash the solid in the reaction kettle with deionized water and anhydrous ethanol three times, and dry at 60°C overnight to obtain yellow MgIn2S4.

[0076] Apply the MgIn2S4 catalyst obtained in Comparative Example 3 to piezophotocatalytic H2 production:

[0077] Add 2 mg of MgIn2S4 to 18 mL of water, ultrasonically treat for 30 min to uniformly disperse the composite catalyst in the water, then add 2 mL of the sacrificial agent triethanolamine, pass in 30 min of N2, and finally irradiate under 240W ultrasonic and 55W xenon lamp simulated sunlight for 2 h. After the experiment is completed, extract 0.5 mL of gas from the tube, detect the peak area by gas chromatography, and calculate the H2 production rate. The calculated H2 production rate is 128.66 μmol / (g·h).

[0078] Comparative Example 4:

[0079] Ni(NO3)2·6H2O and 0.1 g urea were dispersed in 12 mL water and 8 mL ethylene glycol, and ultrasonic dispersion was performed for 15 min to make them uniformly dispersed, and then transferred to a stainless steel reaction kettle with a polytetrafluoroethylene lining, placed in an oven at 150 DEG C for 4 h, after the reaction was completed, the solid in the reaction kettle was filtered, washed with deionized water and anhydrous ethanol three times, and vacuum dried at 60 DEG C overnight to obtain bright green Ni3(NO3)2(OH)4. Then 0.09 g of sulfur powder, 0.03 g of selenium powder, and 0.06 g of NaBH4 were dissolved in 28 mL of water at 70 DEG C, and after cooling to room temperature, 0.06 g of Ni3(NO3)2(OH)4 was added, and stirred vigorously for 10 min, and then the mixed solution was transferred to a reaction kettle with a polytetrafluoroethylene lining, and placed in an oven at 180 DEG C for 12 h, after the reaction was completed, it was naturally cooled to room temperature, and the solid in the reaction kettle was filtered and washed, and dried at 60 DEG C overnight to obtain black NiSe 0.4 S 1.6 (NSS).

[0080] The NiSe 0.4 S 1.6 The catalyst was applied to piezoelectric photocatalytic H2 production:

[0081] 2 mg of NiSe 0.4 S 1.6 was added to 18 mL of water, ultrasonic dispersion was performed for 30 min to make the composite catalyst uniformly dispersed in water, then 2 mL of the sacrificial agent triethanolamine was added, and then 30 min of N2 was introduced, and finally under the irradiation of 240 W ultrasonic and 55 W xenon lamp simulated sunlight for 2 h. After the experiment was completed, 0.5 mL of gas was extracted from the tube, and the peak area was detected by gas chromatography, and the H2 production rate was calculated, and the calculated H2 production rate was 42.57 pmol / (g·h).

[0082] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst characterized in that, The composite catalyst is MgIn2S4 and NiSe 0.4 S 1.6 The heterojunction structure is formed by the composite, wherein NiSe 0.4 S 1.6 The mass of MgIn2S4 is 6-12%; the preparation method of the NiSe 0.4 S 1.6 ​ Ni(NO3)2·6H2O and urea were dissolved in a mixed solution of water and ethylene glycol, ultrasonic treatment for 15 min, then transferred to a reaction kettle with a polytetrafluoroethylene lining, placed in an oven at 150 DEG C for 4 h, after the reaction, natural cooling to room temperature, washing, drying, Ni3(NO3)2(OH)4 was obtained; Sulfur powder, selenium powder, NaBH4 were dissolved in water at 70 °C, after cooling to room temperature, Ni3(NO3)2(OH)4 was added, stirred vigorously for 10 min, then transferred to a reaction kettle with a polytetrafluoroethylene liner, placed in an oven at 180 °C for 12 h, after the reaction was completed, cooled to room temperature, the solid in the reaction kettle was washed and dried at 60 °C overnight to obtain NiSe 0.4 S 1.6 .

2. A NiSe according to claim 1 0.4 S 1.6 A method for preparing a composite catalyst of NiSe / MgIn2S4, characterized by, NiSe 0.4 S 1.6 and MgIn2S4 are dissolved in a solvent, and a NiSe 0.4 S 1.6 / MgIn2S4 composite catalyst is obtained by ultrasonic treatment, stirring, filtration, washing, and drying.

3. The NiSe of claim 2 0.4 S 1.6 A method for preparing a composite catalyst of NiSe / MgIn2S4, characterized in that, The solvent is one of deionized water, anhydrous ethanol, and a mixed solvent of anhydrous ethanol and water; the volume ratio of anhydrous ethanol to deionized water in the mixed solvent of anhydrous ethanol and water is 1:1-4.

4. The NiSe of claim 2 0.4 S 1.6 A method for preparing a composite catalyst of NiSe / MgIn2S4, characterized in that, The ultrasonic power is 240 W, and the ultrasonic time is 30 min; the stirring speed is 400 r / min, and the stirring time is 24 h.

5. The NiSe as claimed in claim 1 0.4 S 1.6 / MgIn2S4 composite catalyst characterized by, The molar ratio of Ni(NO3)2·6H2O to urea is 0.894:1.665; And / or, the mass ratio of sulfur powder, selenium powder, NaBH4 and Ni3(NO3)2(OH)4 is 3:1:2:2; And / or, the volume ratio of water to ethylene glycol in the mixed solution of water and ethylene glycol is 12:

8.

6. The NiSe of claim 2 0.4 S 1.6 A method for preparing a composite catalyst of NiSe / MgIn2S4, characterized in that, The preparation method of MgIn2S4 is: First, MgCl2·6H2O and InCl3·4H2O were dissolved in ethylene glycol, ultrasonic treatment for 30 min, C2H5NS was added, stirring for 30 min, then transferred to a reaction kettle with a polytetrafluoroethylene lining, placed in an oven at 180 DEG C for 12 h, natural cooling to room temperature, washing and drying the solid in the reaction kettle to obtain MgIn2S4.

7. The NiSe as claimed in claim 6 0.4 S 1.6 A method for preparing a composite catalyst of NiSe / MgIn2S4, characterized by, The molar ratio of MgCl2·6H2O to InCl3·4H2O is 1:2; And / or, the mass ratio of C2H5NS to MgCl2·6H2O is 0.30052:0.10165.

8. A NiSe according to claim 1 0.4 S 1.6 / MgIn2S4 composite catalyst in piezophotocatalytic H2 production, characterized in that NiSe 0.4 S 1.6 The NiSe / MgIn2S4 composite catalyst was uniformly dispersed in water, then a sacrificial agent was added, and finally N2 was introduced to carry out catalytic H2 production under ultrasonic and light conditions.

9. Use according to claim 8, characterized in that, The ultrasonic power is 240 W; the light uses 55 W xenon lamp to simulate sunlight; and / or, the NiSe 0.4 S 1.6 The amount of the composite catalyst of MgIn2S4 / CoSe was 2 mg / 18 mL. And / or, the sacrificial agent includes one of triethanolamine, a mixed solution of 0.35 M Na2S and 0.25 M Na2SO3, anhydrous ethanol, and lactic acid.

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