CN109806888B - 1T-MoS2Modified ZnCoS solid solution hollow dodecahedron nanocomposite and preparation method and application thereof - Google Patents
1T-MoS2Modified ZnCoS solid solution hollow dodecahedron nanocomposite and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a 1T-MoS2Firstly, ZnCo-MOF is calcined at high temperature to obtain a derivative thereof, and then the derivative and molybdate are subjected to hydrothermal vulcanization reaction to obtain MoS2The ZnCo-MOF is a bimetallic organic framework material and is obtained by reacting cobalt acetate, zinc acetate and dimethyl imidazole. The method utilizes a bimetallic organic framework material with a high specific surface area and a stable three-dimensional structure as a template, obtains a ZnCo bimetallic oxide derivative through high-temperature calcination, and finally sulfurizes a mixture of the derivative and molybdate through a hydrothermal method to obtain the transition metal sulfide nano material with high catalytic activity. Prepared hollow polyhedron MoS2the/ZnCoS nano composite material has higher performance of photocatalytic water decomposition hydrogen production.
Description
Technical Field
The invention belongs to the technical field of photocatalytic nano materials, and particularly relates to a photocatalyst based on 1T-MoS2Modified ZnCoS solid solution hollow dodecahedron nanocomposite and a preparation method and application thereof.
Background
In recent years, due to global energy shortage and increasingly prominent environmental pollution problems, development of new green energy and technology is imminent, and research on photocatalysis is in progress. Photocatalysis refers to decomposing some easily available or cheap chemicals into more efficient, clean and environment-friendly substances or energy products by using light energy of the nature as an energy source in the presence of a catalyst. The difference between photocatalysis and other catalysis is that the energy consumption rate is low, and catalytic reaction can be carried out only by using natural sunlight as the supply of energy. Meanwhile, sunlight also belongs to renewable resources, so that the method greatly accords with the environmental-friendly and low-consumption chemical process characteristic of a green catalysis concept. The hydrogen energy has important research value for relieving the current energy shortage and solving the environmental problem, and the adoption of photocatalytic water decomposition for hydrogen production is one of the hot spots of research in recent years.
Zinc sulfide is widely studied as one of typical photocatalyst materials, both in breadth and depth. Although ZnS has high catalytic activity and good application prospect, it can only be excited by uv light due to its wide forbidden bandwidth (3.2eV), and its photo-generated electrons and holes can be rapidly recombined, which greatly limits its application in the field of photocatalysis. It is therefore the focus of current research to modify zinc sulfide for applications in the visible range and to further improve its photocatalytic performance. The main way to improve the photocatalytic performance of the material is to modify the material, and the modifying means mainly comprises element doping, catalyst promoters, heterojunction, morphology control, precious metal modification and the like. The introduction of the cocatalyst can greatly improve the catalytic performance, a heterojunction structure can be formed, the forbidden bandwidth of the semiconductor material can be effectively adjusted, the utilization rate of light can be enhanced by adjusting the morphology, and therefore the combination of an effective multi-aspect modification method is the most popular modification means at present.
The bimetallic organic framework material derived photocatalyst generally shows excellent activity in energy-related applications, so that the bimetallic organic framework material is used as a template to synthesize an advanced photocatalytic material, so that the absorption of light and the separation and transfer of electrons can be obviously enhanced. We form a more stable derivative ZnO-Co with a cavity structure by calcining ZnCo-MOF by taking ZnCo-MOF as a template3O4Finally, forming the hollow polyhedron MoS by high-temperature hydrothermal method vulcanization2and/ZnCoS. MoS due to transition metal sulfide2Has the following advantages thatThe noble metal Pt has similar hydrogen adsorption energy, so the noble metal Pt is used as a substitute of the noble metal to be applied to photocatalytic reaction, is a popular promoter currently researched, and can remarkably improve the performance of hydrogen production by photocatalytic water decomposition. Thus, in the final sulfurization stage, the derivative ZnO-Co is added by addition of molybdate3O4Sulfurizing with thioacetamide by a one-step high-temperature hydrothermal method to obtain MoS2Modified ZnCoS hollow polyhedral nano composite material MoS2/ZnCoS。
Disclosure of Invention
Aiming at the problems of the existing photocatalyst, the invention provides a stable hollow polyhedron nano composite photocatalyst, namely 1T-MoS, which has the advantages of high catalytic activity, large specific surface area, good stability, high utilization rate of a light source and low cost2The modified ZnCoS solid solution hollow dodecahedron nanocomposite also provides a preparation method and application thereof.
In order to achieve the above object, the present invention adopts the following technical solutions.
1T-MoS2The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite comprises the following steps:
(1) dissolving cobalt acetate and zinc acetate in methanol at normal temperature to obtain a solution A;
(2) dissolving dimethyl imidazole in methanol at normal temperature to obtain a solution B;
(3) stirring the solution A at normal temperature, adding the solution B into the solution A, continuously stirring after the solution B is added, standing, performing suction filtration, and washing to obtain a bimetallic organic framework material ZnCo-MOF;
(4) drying the ZnCo-MOF obtained in the step (3), and then calcining to obtain the derivative ZnO-Co of the bimetallic organic framework material3O4；
(5) The bimetal organic framework material derivative ZnO-Co obtained in the step (4)3O4And dispersing molybdate and thioacetamide in water to perform hydrothermal reaction, and performing post-treatment after the hydrothermal reaction is finished to obtain 1T-MoS2Modified ZnCoS solid solution hollow dodecahedral nanocomposites, MoS2a/ZnCoS nanocomposite.
Preferably, the mass ratio of the cobalt acetate to the zinc acetate is: 1:9-9:1, wherein the ratio of the volume of the methanol in the solution A to the total amount of the cobalt acetate and the zinc acetate is 10-50 ml/mmol; the ratio of the amount of the substance of the dimethyl imidazole to the total amount of the cobalt acetate and the zinc acetate in the step (1) is 4-8: 1, the ratio of the volume of methanol in the solution B to the amount of substance of dimethylimidazole is 5 to 30 ml/mmol.
Preferably, the solution B is continuously stirred for 20 to 24 hours after the solution B is added, and is kept stand for 4 to 6 hours.
Preferably, in the step (4), the ZnCo-MOF is dried for 8 to 12 hours at the temperature of between 60 and 80 ℃.
Preferably, the calcination process parameters are as follows: under the air atmosphere, the calcination temperature is 350-400 ℃, the heating rate is 2-5 ℃/min, after the temperature is increased to 350-400 ℃, the temperature is kept at 350-400 ℃ for 4-8h, and then the temperature is reduced to the room temperature at the cooling rate of 2-5 ℃/min.
Preferably, the molybdate is selected from one of water-soluble sodium molybdate and ammonium molybdate.
Preferably, the mass of molybdenum in the molybdate in the step (5) is equal to that of ZnO-Co3O4The mass ratio of (A) to (B) is 1-5: 100, said ZnO-Co3O4And the mass ratio of the total mass of the molybdate and the thioacetamide is 1: 3-5.
Preferably, the ZnO-Co is3O4Performing hydrothermal reaction on the molybdate and thioacetamide to obtain MoS2The step of the/ZnCoS nanocomposite comprises:
1) adding ZnO-Co3O4The molybdate and the thioacetamide are dispersed in a container filled with 30-60ml of distilled water and are stirred uniformly to obtain a mixed solution;
2) transferring the mixed solution in the container to a 60-100ml polytetrafluoroethylene lining reaction kettle, sealing the lining reaction kettle in a stainless steel high-pressure reaction kettle, putting the stainless steel high-pressure reaction kettle into an oven, heating to the reaction temperature of 160-220 ℃, wherein the heating rate is 1-3 ℃/min, and then keeping the constant temperature at the temperature of 160-220 ℃ for 18-24 hours for reaction;
3) fromCooling to room temperature, opening the inner lining reaction kettle, filtering, washing with distilled water and ethanol in sequence, and drying in a vacuum drying oven at 60-80 deg.C for 8-12h to obtain polyhedral MoS2a/ZnCoS nanocomposite.
The invention also provides the 1T-MoS prepared by the preparation method2Modified ZnCoS solid solution hollow dodecahedron nanocomposite and application thereof in photocatalytic water decomposition hydrogen production.
Compared with the prior art, the invention has the following advantages:
the method comprises the steps of calcining a bimetallic organic framework material serving as a template in an air atmosphere to obtain a derivative with a hollow structure, and finally vulcanizing by a one-step hydrothermal method to obtain a stable hollow polyhedral sulfide MoS with a large specific surface area2a/ZnCoS nanocomposite. The large specific surface area can provide more active sites, and the solid solution ZnCoS has a proper forbidden bandwidth and a wide light absorption range so as to improve the utilization rate of light; the cavity is favorable for light to be reflected for multiple times in the material, the utilization rate of the light is further improved, and the catalyst promoter MoS2As a noble metal substitute, the doping of the noble metal can obviously improve the performance of hydrogen production by photocatalytic water decomposition, and the noble metal can be used as a semiconductor 2H-MoS2In contrast, a metallic 1T phase MoS with a disordered octahedral structure2The photocatalyst has rich active sites on edges and basal planes and higher electron conductivity, thereby showing better photocatalytic activity. The nano composite material can be simply synthesized, has better photocatalytic water decomposition hydrogen production performance, stability and light utilization rate compared with ZnS, and has cheap synthesis raw materials and simple preparation process.
Drawings
FIG. 1 is Zn0.5Co0.5-XRD pattern of MOF material;
FIG. 2 shows Zn0.5Co0.5SEM picture of MOF;
FIG. 3 shows ZnO-Co3O4XRD pattern of (a);
FIG. 4 shows ZnO-Co3O4A TEM image of (B);
FIG. 5 is a nanocomposite 2% MoS2/Zn0.5Co0.5XRD pattern of S;
FIG. 6 is a nanocomposite 2% MoS2/Zn0.5Co0.5SEM picture of S;
FIG. 7 is a nanocomposite 2% MoS2/Zn0.5Co0.5A TEM image of S;
FIG. 8 is a nanocomposite 2% MoS2/Zn0.5Co0.5A nitrogen adsorption and desorption curve diagram of S;
FIG. 9 is a nanocomposite 2% MoS2/Zn0.5Co0.5(ii) a Raman map of S;
FIG. 10 is a nanocomposite 2% MoS2/Zn0.5Co0.5Photocatalytic performance diagram of S.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings but the scope and the implementation manner of the present invention are not limited thereto.
In practice, the reagents and materials employed are commercially available, unless otherwise specified.
Example 1
1T-MoS2The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite comprises the following specific steps:
(1) preparation of metal organic framework material ZnCo-MOF:
184mg of zinc acetate (1mmol) and 177mg of cobalt acetate (1mmol) were weighed out and dissolved in 50ml of methanol solution, and stirred at room temperature until the solute was completely dissolved, to obtain a mixed solution of two metal salts as solution A. 414mg of dimethylimidazole (8mmol) was weighed out and dissolved in 40ml of methanol solution and stirred at room temperature until the solute was completely dissolved, giving solution B. Slowly adding the solution B into the solution A at room temperature, continuously stirring for 20h, standing for 6h, separating a reaction product through suction filtration, washing with distilled water for 3 times, washing with ethanol for 3 times, and drying the product in a vacuum oven at 60 ℃ for 8h to obtain Zn0.5Co0.5-a MOF. FIG. 1 is Zn0.5Co0.5XRD pattern of MOF material, with better crystalline form,FIG. 2 shows Zn0.5Co0.5SEM image of MOF, from which it can be seen that Zn of very uniform size is synthesized0.5Co0.5-a MOF material.
(2) Derivative ZnO-Co3O4The preparation of (1):
weighing a certain amount of the synthesized Zn0.5Co0.5Placing the MOF material in a quartz boat, calcining in a high-temperature calcining furnace, heating to 350 ℃ at a heating rate of 2 ℃/min under an air atmosphere, calcining at a constant temperature for 8h, and cooling to room temperature at a cooling rate of 2 ℃/min to obtain the derivative ZnO-Co3O4. FIG. 3 shows ZnO-Co3O4The XRD pattern of (A) shows that there is no MOF peak at all, indicating Zn0.5Co0.5The MOF was completely successfully oxidized to ZnO-Co3O4. FIG. 4 shows the derivative ZnO-Co3O4The TEM image of (A) shows that the calcined derivative ZnO-Co3O4The structure of the perfect rhombohedral is kept, and a cavity structure is formed.
(3) Nanocomposite 2% MoS2/Zn0.5Co0.5S preparation:
weighing 10mg of Na2MoO4·2H2O，525mg CH3CSNH2And 160mg of the above-mentioned derivative ZnO-Co3O4Stirring uniformly in 50ml of deionized water at room temperature, transferring the uniformly dispersed solution into a lining of a 100ml polytetrafluoroethylene high-temperature reaction kettle, sealing the lining, placing the stainless steel reaction kettle into a stainless steel reaction kettle, heating the stainless steel reaction kettle to 180 ℃ in a constant-temperature drying oven, heating the stainless steel reaction kettle at the heating rate of 2 ℃/min, continuously reacting for 20 hours, naturally cooling the reaction kettle to room temperature, taking the reaction kettle out, separating the reaction product through suction filtration, washing the reaction product for 3 times with water, washing the reaction product for 3 times with ethanol, and finally placing the reaction product in a vacuum oven at 80 ℃ for drying for 8 hours to obtain black powder, namely 2% MoS of the nano composite material with the mass fraction of molybdenum being 22/Zn0.5Co0.5And S. FIG. 5 shows 2% MoS of the nano composite photocatalytic material2/Zn0.5Co0.5XRD pattern of S from which the oxide ZnO-Co can be seen3O4The peak of (A) completely disappeared to show that the oxide ZnO-Co3O4Is completely converted into sulfide. FIGS. 6 and 7 are 2% MoS for nanocomposites, respectively2/Zn0.5Co0.5And SEM and TEM images of S show that the nano composite material after hydrothermal reaction has well maintained hollow dodecahedron structure. FIG. 8 is 2% MoS2/Zn0.5Co0.5The nitrogen adsorption and desorption curve chart of the S composite material has the specific surface area of 70m2g-1. FIG. 9 is a nanocomposite 2% MoS2/Zn0.5Co0.5Raman plot of S, 2% MoS can be seen from FIG. 92/Zn0.5Co0.5The S composite material contains metal 1T phase MoS2. FIG. 10 is 2% MoS2/Zn0.5Co0.5S,Zn0.5Co0.5Compared with the photocatalytic water decomposition hydrogen production performance of S and ZnS, the hydrogen production amounts are respectively 15.5mmol/g/h,6.12mmol/g/h and 0.98 mmol/g/h.
Example 2
1T-MoS2The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite comprises the following specific steps:
(1) preparation of metal organic framework material ZnCo-MOF:
184mg of zinc acetate (1mmol) and 1.593g of cobalt acetate (9mmol) were weighed out and dissolved in 100ml of methanol solution, and stirred at room temperature until the solute was completely dissolved, to obtain a mixed solution of two metal salts as solution A. Weighing 4.144g of dimethyl imidazole (80mmol) and dissolving in 1600ml of methanol solution, stirring at room temperature until the solute is completely dissolved to obtain solution B. Slowly adding the solution B into the solution A at room temperature, continuously stirring for 24h, standing for 6h, separating a reaction product through suction filtration, washing with distilled water for 3 times, washing with ethanol for 3 times, and drying the product in a vacuum oven at 80 ℃ for 8h to obtain Zn0.1Co0.9-MOF。
(2) Derivative ZnO-Co3O4The preparation of (1):
weighing a certain amount of the synthesized Zn0.1Co0.9Placing the MOF material in a quartz boat, calcining in a high-temperature calcining furnace, heating to 400 ℃ at a heating rate of 5 ℃/min under an air atmosphere, calcining at a constant temperature for 4h,cooling to room temperature at a cooling rate of 5 ℃/min to obtain the derivative ZnO-Co3O4。
(3) Nanocomposite 5% MoS2/Zn0.1Co0.9S preparation:
weighing 20mg of Na2MoO4·2H2O，549mg CH3CSNH2And 160mg of the derivative ZnO-Co3O4Stirring uniformly in 50ml of deionized water at room temperature, transferring the uniformly dispersed solution into a lining of a 100ml polytetrafluoroethylene high-temperature reaction kettle, sealing the lining, placing the stainless steel reaction kettle into a stainless steel reaction kettle, heating the stainless steel reaction kettle to 160 ℃ in a constant-temperature drying oven, heating the stainless steel reaction kettle at the heating rate of 1 ℃/min, continuously reacting for 24 hours, naturally cooling the reaction kettle to room temperature, taking the reaction kettle out, separating the reaction product through suction filtration, washing the reaction product for 3 times with water, washing the reaction product for 3 times with ethanol, and finally placing the reaction product in a vacuum oven at 80 ℃ for drying for 8 hours to obtain the 5% MoS nano composite material with the mass fraction of molybdenum of 5%2/Zn0.1Co0.9S, 5% MoS of the nanocomposite2/Zn0.1Co0.9The photocatalytic water decomposition hydrogen production performance of S is 11.5 mmol/g/h.
Example 3
1T-MoS2The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite comprises the following specific steps:
(1) preparation of metal organic framework material ZnCo-MOF:
1.656mg of zinc acetate (9mmol) and 177mg of cobalt acetate (1mmol) were weighed out and dissolved in 500ml of methanol solution, and stirred at room temperature until the solute was completely dissolved, to obtain a mixed solution of two metal salts as a solution A. 3.108g of dimethylimidazole (60mmol) was weighed out and dissolved in 1800ml of methanol solution and stirred at room temperature until the solute was completely dissolved, giving solution B. Slowly adding the solution B into the solution A at room temperature, continuously stirring for 24h, standing for 8h, separating a reaction product through suction filtration, washing with distilled water for 3 times, washing with ethanol for 3 times, and drying the product in a vacuum oven at 80 ℃ for 12h to obtain Zn0.9Co0.1-MOF 。
(2) Derivative ZnO-Co3O4The preparation of (1):
weighing a certain amount of the synthesized Zn0.9Co0.1Placing the MOF material in a quartz boat, calcining in a high-temperature calcining furnace, heating to 400 ℃ at a heating rate of 3 ℃/min under an air atmosphere, calcining at a constant temperature for 6h, and cooling to room temperature at a cooling rate of 3 ℃/min to obtain the derivative ZnO-Co3O4。
(3) Nanocomposite 0.5% MoS2/Zn0.9Co0.1S preparation:
weighing 5mg of Na2MoO4·2H2O，495mg CH3CSNH2And 160mg of the derivative ZnO-Co3O4Stirring uniformly in 50ml of deionized water at room temperature, transferring the uniformly dispersed solution into a lining of a 100ml polytetrafluoroethylene high-temperature reaction kettle, sealing the lining, placing the stainless steel reaction kettle into a stainless steel reaction kettle, heating the stainless steel reaction kettle to 220 ℃ in a constant-temperature drying oven, heating the stainless steel reaction kettle at a heating rate of 3 ℃/min, continuously reacting for 18 hours, naturally cooling the reaction kettle to room temperature, taking the reaction kettle out, separating a reaction product through suction filtration, washing the reaction product for 3 times with water, washing the reaction product for 3 times with ethanol, and finally placing the reaction product in a vacuum oven at 80 ℃ for drying for 8 hours to obtain the nano composite material 0.5% MoS with the mass fraction of molybdenum of 0.5%2/Zn0.9Co0.1S, 0.5% MoS of the nanocomposite2/Zn0.9Co0.1The photocatalytic water decomposition hydrogen production performance of S is 9.4 mmol/g/h.
ZnCo-MOF and ZnO-Co prepared in examples 2 and 33O4Reference is made to the figure in example 1 for corresponding properties.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1.1T-MoS2The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized by comprising the following steps of:
(1) dissolving cobalt acetate and zinc acetate in methanol at normal temperature to obtain a solution A;
(2) dissolving dimethyl imidazole in methanol at normal temperature to obtain a solution B;
(3) stirring the solution A at normal temperature, adding the solution B into the solution A, continuously stirring after the solution B is added, standing, performing suction filtration, and washing to obtain a bimetallic organic framework material ZnCo-MOF;
(4) drying the ZnCo-MOF obtained in the step (3), and then calcining to obtain the derivative ZnO-Co of the bimetallic organic framework material3O4；
(5) The bimetal organic framework material derivative ZnO-Co obtained in the step (4)3O4And dispersing molybdate and thioacetamide in water to perform hydrothermal reaction, and performing post-treatment after the hydrothermal reaction is finished to obtain 1T-MoS2Modified ZnCoS solid solution hollow dodecahedral nanocomposites, MoS2a/ZnCoS nanocomposite.
2. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized in that the mass ratio of the cobalt acetate to the zinc acetate is as follows: 1:9-9:1, wherein the ratio of the volume of the methanol in the solution A to the total amount of the cobalt acetate and the zinc acetate is 10-50 ml/mmol; the ratio of the amount of the substance of the dimethyl imidazole to the total amount of the cobalt acetate and the zinc acetate is 4-8: 1, the ratio of the volume of methanol in the solution B to the amount of substance of dimethylimidazole is 5 to 30 ml/mmol.
3. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized in that the solution B is continuously stirred for 20-24 hours after being added, and is kept stand for 4-6 hours.
4. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized by comprising the following steps(4) The ZnCo-MOF is dried for 8 to 12 hours at the temperature of between 60 and 80 ℃.
5. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized in that the calcination process parameters are as follows: under the air atmosphere, the calcination temperature is 350-400 ℃, the heating rate is 2-5 ℃/min, after the temperature is increased to 350-400 ℃, the temperature is kept at 350-400 ℃ for 4-8h, and then the temperature is reduced to the room temperature at the cooling rate of 2-5 ℃/min.
6. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized in that molybdate is selected from one of water-soluble sodium molybdate and ammonium molybdate.
7. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized in that the mass of molybdenum in molybdate and ZnO-Co in the step (5)3O4The mass ratio of (A) to (B) is 1-5: 100, said ZnO-Co3O4And the mass ratio of the total mass of the molybdate and the thioacetamide is 1: 3-5.
8. 1T-MoS according to claim 12The preparation method of the modified ZnCoS solid solution hollow dodecahedron nanocomposite is characterized in that ZnO-Co is used3O4Performing hydrothermal reaction on the molybdate and thioacetamide to obtain MoS2The step of the/ZnCoS nanocomposite comprises:
1) adding ZnO-Co3O4The molybdate and the thioacetamide are dispersed in a container filled with 30-60ml of distilled water and are stirred uniformly to obtain a mixed solution;
2) transferring the mixed solution in the container to a 60-100ml polytetrafluoroethylene lining reaction kettle, sealing the lining reaction kettle in a stainless steel high-pressure reaction kettle, putting the stainless steel high-pressure reaction kettle into an oven, heating to the reaction temperature of 160-220 ℃, wherein the heating rate is 1-3 ℃/min, and then keeping the constant temperature at the temperature of 160-220 ℃ for 18-24 hours for reaction;
3) naturally cooling to room temperature, opening the reaction kettle with the inner lining, filtering, washing with distilled water and ethanol in sequence, and drying in a vacuum drying oven at 60-80 deg.C for 8-12h to obtain polyhedral MoS2a/ZnCoS nanocomposite.
9. 1T-MoS prepared by the preparation method of claim 12Modified ZnCoS solid solution hollow dodecahedron nanocomposite.
10. The 1T-MoS of claim 92The modified ZnCoS solid solution hollow dodecahedron nanocomposite is applied to photocatalytic water decomposition hydrogen production.
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