CN115893487A - Morphology-controllable bismuth sulfide nano material and preparation method and application thereof - Google Patents
Morphology-controllable bismuth sulfide nano material and preparation method and application thereof Download PDFInfo
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- FBXVOTBTGXARNA-UHFFFAOYSA-N bismuth;trinitrate;pentahydrate Chemical compound O.O.O.O.O.[Bi+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FBXVOTBTGXARNA-UHFFFAOYSA-N 0.000 description 3
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Abstract
The invention discloses a bismuth sulfide nano material with controllable morphology as well as a preparation method and application thereof, wherein the preparation method comprises the following steps: providing Bi (S) 2 CNEt 2 ) 3 Powder and aliphatic amine solvent; mixing the Bi (S) 2 CNEt 2 ) 3 And dispersing the powder in the aliphatic amine solvent, and then reacting at a preset reaction temperature for a preset time to obtain the bismuth sulfide nano material with the required morphology. The invention adopts solvothermal reaction and uses a single precursor Bi (S) 2 CNEt 2 ) 3 Powder is prepared by dissolving aliphatic amine solventThe preparation does not need any substance regulation, the required bismuth sulfide nano materials (nano-sheet bismuth sulfide nano material, nano-tube bismuth sulfide nano material and nano-rod bismuth sulfide nano material) with different appearances can be prepared by adopting the same preparation method under the same reaction system and simply controlling the reaction time and temperature, and the method is simple, safe and pollution-free.
Description
Technical Field
The invention relates to the technical field of semiconductor materials, in particular to a bismuth sulfide nano material with controllable morphology as well as a preparation method and application thereof.
Background
Bismuth sulfide is a direct band gap semiconductor material, has good light absorption and excellent photoelectron characteristics, attracts much attention in recent years, and has been applied to numerous fields such as photocatalysis, photovoltaics, medicine, energy storage and the like. For wider research and application, higher requirements are put forward on simple and controllable synthesis of bismuth sulfide materials. At present, bismuth sulfide has various shapes, and bismuth sulfide with different shapes has unique characteristics in performance, particularly the catalytic performance of bismuth sulfide nano materials is closely related to the shape. At present, bismuth sulfide with different morphologies is prepared by solvothermal, hydrothermal or ionothermal reaction under different reaction systems, different reactants are utilized, and the pH regulation and control of a surfactant or a solution are combined, so that the methods increase the preparation cost and the preparation complexity while realizing the morphology regulation and control, and limit the research and application of bismuth sulfide to a certain extent.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a bismuth sulfide nano material with controllable morphology as well as a preparation method and application thereof, and aims to solve the problem that the existing bismuth sulfide materials with different morphologies are obtained by different preparation methods under different reaction systems and cannot be prepared by the same preparation method under the same system.
The technical scheme of the invention is as follows:
the invention provides a preparation method of a bismuth sulfide nano material with controllable morphology, which comprises the following steps:
providing Bi (S) 2 CNEt 2 ) 3 Powder and aliphatic amine solvent;
mixing the Bi (S) 2 CNEt 2 ) 3 And dispersing the powder in the aliphatic amine solvent, and then reacting at a preset reaction temperature for a preset time to obtain the bismuth sulfide nano material with the required morphology.
Optionally, the number of carbon atoms in the carbon chain of the aliphatic amine solvent is less than or equal to 3.
Optionally, the aliphatic amine solvent is selected from at least one of trimethylamine, monoethylamine, ethylenediamine and propylamine.
Alternatively, the Bi (S) 2 CNEt 2 ) 3 The preparation method of the powder comprises the following steps:
providing an aqueous bismuth nitrate solution and an aqueous sodium diethyldithiocarbamate solution;
dropwise adding the bismuth nitrate aqueous solution into the sodium diethyldithiocarbamate aqueous solution, and reacting to obtain the Bi (S) 2 CNEt 2 ) 3 And (3) powder.
Alternatively, the Bi (S) 2 CNEt 2 ) 3 The ratio of the powder to the aliphatic amine solvent is (0.15-0.3) g: (10-20) mL.
Optionally, reacting for 1-12 h at the reaction temperature of 80-200 ℃ to obtain the bismuth sulfide nano material with the required morphology.
Optionally, reacting at the reaction temperature of 80-130 ℃ for 0.5-2 h to obtain the nano flaky bismuth sulfide nano material;
reacting for 3-6 h at the reaction temperature of 130-150 ℃ to obtain a nano-tube-shaped bismuth sulfide nano-material;
reacting for 8-12 h at the reaction temperature of 130-150 ℃ to obtain the nano-rod-shaped bismuth sulfide nano-material.
In a second aspect of the invention, a morphology-controllable bismuth sulfide nanomaterial is provided, wherein the bismuth sulfide nanomaterial is prepared by the preparation method provided by the invention.
In a third aspect of the invention, the invention provides an application of the bismuth sulfide nano material with controllable morphology in the field of photocatalysis.
Optionally, the bismuth sulfide nano material with controllable morphology is used as a photocatalyst in photocatalytic decomposition of organic pollutants.
Has the advantages that: the invention provides a preparation method of a bismuth sulfide nano material with controllable morphology, which specifically adopts solvothermal reaction and uses a single precursor Bi (S) 2 CNEt 2 ) 3 The powder takes aliphatic amine solvent as solvent, no substance is needed to regulate and control, and the required bismuth sulfide nano-materials (nano-sheet bismuth sulfide nano-materials, nano-tube bismuth sulfide nano-materials and nano-rod bismuth sulfide nano-materials) with different morphologies and uniformity can be prepared by simply controlling the reaction time and temperature, so that the method is simple, safe and pollution-free. The preparation method realizes the preparation of the bismuth sulfide nano-material with controllable morphology by a simple same preparation method under the same reaction system, and makes up for the blank of realizing the preparation of the bismuth sulfide nano-material with different morphologies by the same preparation method under the same reaction system.
Drawings
Fig. 1 is an XRD chart of bismuth sulfide nanosheets, bismuth sulfide nanotubes, and bismuth sulfide nanorods prepared in embodiments 1-3 of the present invention.
Fig. 2 is FESEM images of bismuth sulfide nanosheets, bismuth sulfide nanotubes, bismuth sulfide nanorods prepared in examples 1-3 of the present invention, wherein (a) is an FESEM image of the bismuth sulfide nanosheets prepared in example 1, and (d) is an enlarged view of (a); (b) An FESEM image of the bismuth sulfide nanotubes prepared in example 2, and (e) an enlarged image of (b); (c) In order to obtain a FESEM image of the bismuth sulfide nanorods prepared in example 3, and (f) is an enlarged view of (c).
Fig. 3 is an EDS diagram of bismuth sulfide nanosheets prepared in example 1 of the present invention.
FIG. 4 is a diagram showing the results of decomposing rhodamine B with bismuth sulfide nanosheets, bismuth sulfide nanotubes and bismuth sulfide nanorods prepared in examples 1 to 3 of the present invention, wherein (a) is C t /C 0 A time-dependent change of (b) is ln (C) 0 /C t ) Graph over time.
In FIG. 5, (a) is an FESEM image of bismuth sulfide prepared at 130 ℃ for 0.5 hour, (b) is an FESEM image of bismuth sulfide prepared at 130 ℃ for 2 hours, (c) is an FESEM image of bismuth sulfide prepared at 130 ℃ for 4 hours, and (d) is an FESEM image of bismuth sulfide prepared at 130 ℃ for 8 hours.
FIG. 6 is an SEM photograph of the products obtained in comparative example 1 using water as a solvent at different reaction temperatures and reaction times, wherein (a) is 150 ℃ for 6 hours; (b) at 150 ℃ for 24h; (c) the temperature is 180 ℃ and the time is 6 hours; (d) the temperature is 180 ℃ for 24h; (e) at 200 ℃ for 24h.
FIG. 7 is an SEM photograph of the products obtained in comparative example 2 using ethanol as a solvent at different reaction temperatures and reaction times, wherein (a) is 120 ℃ for 6h; (b) at 120 ℃ for 12h; (c) at 150 ℃ for 6h; (d) at 150 ℃ for 24h; (e) at 180 ℃ for 6h; (f) at 180 ℃ for 12h.
FIG. 8 is an SEM photograph of the products obtained in comparative example 3 using ethylene glycol as a solvent at different reaction temperatures and reaction times, wherein (a) is 150 ℃ for 6 hours; (b) at 150 ℃ for 24h; (c) the temperature is 200 ℃ for 12h; and (d) at 200 ℃ for 24h.
Detailed Description
The invention provides a bismuth sulfide nano material with controllable morphology, a preparation method and application thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and more clear. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The embodiment of the invention provides a preparation method of a bismuth sulfide nano material with controllable morphology, which comprises the following steps:
s1, providing Bi (S) 2 CNEt 2 ) 3 Powder and aliphatic amine solvent;
s2, mixing the Bi (S) 2 CNEt 2 ) 3 And dispersing the powder in the aliphatic amine solvent, and then reacting at a preset reaction temperature for a preset time to obtain the required micro-morphology bismuth sulfide nano-material.
The embodiment of the invention provides a preparation method of a bismuth sulfide nano material with controllable morphology, which is specifically adoptedBy solvothermal reaction using a single precursor of Bi (S) 2 CNEt 2 ) 3 The powder takes aliphatic amine solvent as solvent, no matter regulation (such as a morphology control agent or a pH value regulator) is needed, and the required bismuth sulfide nano-materials (nano-sheet bismuth sulfide nano-material, nano-tube bismuth sulfide nano-material and nano-rod bismuth sulfide nano-material) with different morphologies and uniformity can be prepared by simply controlling the reaction time and temperature, so that the method is simple, safe and pollution-free. The preparation method realizes the preparation of the bismuth sulfide nano-material with controllable morphology under the same reaction system and by the same simple preparation method, and makes up for the blank of realizing the preparation of bismuth sulfide nano-materials with different morphologies under the same reaction system and by the same preparation method.
It is understood that the topography in this embodiment refers to a microscopic topography, i.e., a topography observed by magnifying a material (e.g., by scanning electron microscopy).
In one embodiment, the number of carbon atoms in the carbon chain of the aliphatic amine solvent is 3 or less.
In one embodiment, the aliphatic amine solvent is selected from at least one of trimethylamine, monoethylamine, ethylenediamine, and propylamine, but is not limited thereto. Wherein trimethylamine and monoethylamine are used as gases, and when the catalyst is used specifically, the catalyst is dissolved in water to prepare aqueous solution with the mass fraction of 30 wt%.
In one embodiment, the Bi (S) 2 CNEt 2 ) 3 The preparation method of the powder comprises the following steps:
s11, providing a bismuth nitrate aqueous solution and a sodium diethyldithiocarbamate aqueous solution;
s12, dropwise adding the bismuth nitrate aqueous solution into the sodium diethyldithiocarbamate aqueous solution, and reacting to obtain the Bi (S) 2 CNEt 2 ) 3 And (3) powder.
In this embodiment, bi (S) 2 CNEt 2 ) 3 The powder can be prepared by directly mixing the aqueous solution of bismuth nitrate and sodium diethyldithiocarbamate, and the preparation method is simple and easy to operate.
In step S11, the bismuth nitrate aqueous solution may be prepared by dissolving bismuth nitrate pentahydrate in water. The aqueous solution of sodium diethyldithiocarbamate can be prepared by dissolving sodium diethyldithiocarbamate trihydrate in water.
In S12, dropwise adding the bismuth nitrate aqueous solution into a sodium diethyldithiocarbamate aqueous solution at normal temperature, and reacting to obtain the Bi (S) 2 CNEt 2 ) 3 And (3) powder. Wherein the molar ratio of bismuth nitrate in the bismuth nitrate aqueous solution to sodium diethyldithiocarbamate in the sodium diethyldithiocarbamate aqueous solution is 1:3.
in one embodiment, the Bi (S) 2 CNEt 2 ) 3 The ratio of the powder to the aliphatic amine solvent is (0.15-0.3) g: (10-20) mL.
When the aliphatic amine solvent is selected from trimethylamine and monoethylamine, bi (S) 2 CNEt 2 ) 3 The ratio of the powder to the trimethylamine aqueous solution with the mass fraction of 30 percent is (0.15-0.3) g: (10-20) mL; bi (S) 2 CNEt 2 ) 3 The ratio of the powder to a 30% monoethylamine aqueous solution by mass is (0.15-0.3) g: (10-20) mL.
When the aliphatic amine solvent is selected from ethylenediamine and propylamine, bi (S) 2 CNEt 2 ) 3 The ratio of the powder to the ethylenediamine is 0.15-0.3) g: (10-20) mL of Bi (S) 2 CNEt 2 ) 3 The ratio of the powder to the propylamine is (0.15-0.3) g: (10-20) mL.
In one embodiment, the bismuth sulfide nano material with the required morphology is obtained by reacting for 1 to 12 hours at a reaction temperature of 80 to 200 ℃.
In some specific embodiments, the reaction is carried out at a reaction temperature of 80-130 ℃ for 0.5-2 h to obtain a nanosheet-shaped bismuth sulfide nanomaterial (i.e., bismuth sulfide nanosheet);
reacting for 3-6 h at the reaction temperature of 130-150 ℃ to obtain a nano-tube-shaped bismuth sulfide nano-material (namely a bismuth sulfide nano-tube);
reacting for 8-12 h at the reaction temperature of 130-150 ℃ to obtain the nano-rod-shaped bismuth sulfide nano-material (namely the bismuth sulfide nano-rod).
The invention provides a method for preparing bismuth sulfide nanosheets (80-130 ℃, 0.5-2 h), bismuth sulfide nanotubes (130-150 ℃, 3-6 h) and bismuth sulfide nanorods (130-150 ℃, 8-12 h) under the condition of a single precursor without any substance regulation and control, and the bismuth sulfide nanosheets (80-130 ℃, 0.5-2 h), the bismuth sulfide nanotubes (130-150 ℃, 3-6 h) and the bismuth sulfide nanorods (130-150 ℃, 8-12 h) can be prepared, and the shapes of the bismuth sulfide are crushed and re-grown into the nanotubes along with the prolonging of time and the rising of temperature, and the nanotube walls gradually thicken and grow into the nanorods, specifically, the growth process can be shown in a figure 5, wherein (a) is an FESEM picture of the bismuth sulfide prepared under the conditions of 130 ℃ and 0.5h (obtaining the nanosheets), (b) is an FESEM picture of the bismuth sulfide prepared under the conditions of 130 ℃ and 2h (obtaining the nanotubes gradually crushed and re-grown), (c) is an FESEM picture of the bismuth sulfide prepared under the conditions of 130 ℃ and 4h (obtaining the nanotubes gradually thicken and growing into the nanorods).
The embodiment of the invention also provides a bismuth sulfide nano material with controllable morphology, wherein the bismuth sulfide nano material is prepared by the preparation method provided by the embodiment of the invention.
The morphology-controllable bismuth sulfide nano material provided by the embodiment of the invention can be a bismuth sulfide nano sheet, a bismuth sulfide nano tube and a bismuth sulfide nano rod. The bismuth sulfide nanosheet, the bismuth sulfide nanotube and the bismuth sulfide nanorod have proper band gaps (1.3-1.7 eV) and energy bands, and are good visible-light catalysts.
The embodiment of the invention also provides application of the morphology-controllable bismuth sulfide nano material in the field of photocatalysis. The bismuth sulfide nano material has a proper band gap (1.3-1.7 eV) and energy band, is a good visible light catalyst, and the catalytic performance and the appearance of the bismuth sulfide nano material are closely related.
In one embodiment, the bismuth sulfide nanomaterial with controllable morphology is applied to photocatalytic decomposition of organic pollutants as a photocatalyst.
The details are described below by way of specific examples.
Example 1
Adding bismuth nitrate pentahydrate into deionized water, and magnetically stirring for two hours at room temperature to obtain a solution A;
adding sodium diethyldithiocarbamate trihydrate (the molar ratio of the sodium diethyldithiocarbamate trihydrate to bismuth nitrate pentahydrate is 3:1) into deionized water, and magnetically stirring for two hours at room temperature to obtain a solution B;
dropwise adding the solution A into the solution B under the condition of magnetic stirring, wherein the solution is transparent to generate yellow solid, and the yellow solid is continuously increased along with the dropwise adding process. Magnetically stirring for 2h, filtering the mixture to obtain yellow solid, and drying in a drying oven at 60 deg.C for 12h to obtain Bi (S) 2 CNEt 2 ) 3 Powder;
0.15g of Bi (S) 2 CNEt 2 ) 3 Adding the powder into a 50mL polytetrafluoroethylene kettle, adding 10mL ethylenediamine monohydrate, magnetically stirring for 1h, and then ultrasonically dispersing for 1h. And (3) placing the dispersed solution in a homogeneous reaction furnace, reacting at 100 ℃ for 2h under the condition of rotary stirring (30 r/m), performing suction filtration, alternately washing the obtained black solid substance with alcohol and deionized water for three times, and then placing in a drying oven for drying at 60 ℃ for 12h to obtain the bismuth sulfide nanosheets.
Example 2
Bi(S 2 CNEt 2 ) 3 The powder was prepared in the same manner as in example 1.
0.15g of Bi (S) 2 CNEt 2 ) 3 Adding the powder into a 50mL polytetrafluoroethylene kettle, adding 10mL ethylene diamine monohydrate, magnetically stirring for 1h, and then ultrasonically dispersing for 1h. And (3) placing the dispersed solution in a homogeneous reaction furnace, reacting at 150 ℃ for 3h under the condition of rotary stirring (30 r/min), performing suction filtration, alternately washing the obtained black solid substance with alcohol and deionized water for three times, and then placing in a drying oven for drying at 60 ℃ for 12h to obtain the bismuth sulfide nano-tube.
Example 3
Bi(S 2 CNEt 2 ) 3 Method for preparing powderThe same as in example 1.
0.15g of Bi (S) 2 CNEt 2 ) 3 Adding the powder into a 50mL polytetrafluoroethylene kettle, adding 10mL ethylenediamine monohydrate, magnetically stirring for 1h, and then ultrasonically dispersing for 1h. And placing the dispersed solution in a homogeneous reaction furnace, performing suction filtration after reacting for 12h at the temperature of 150 ℃ under the condition of rotary stirring (30 revolutions per minute), alternately washing the obtained black solid substance with alcohol and deionized water for three times, and then placing in a drying oven for drying for 12h at the temperature of 60 ℃ to obtain the bismuth sulfide nanorod.
And (3) testing:
(1) XRD tests on the bismuth sulfide nanosheets, the bismuth sulfide nanotubes and the bismuth sulfide nanorods prepared in examples 1-3 showed results shown in FIG. 1.
The results show that: the XRD of bismuth sulfide obtained under the reaction conditions of 100 ℃ and 2h in example 1 is significantly different from the XRD patterns of bismuth sulfide obtained under the reaction conditions of 150 ℃ and 3h in example 2 and 150 ℃ and 12h in example 3, because bismuth sulfide nanosheets are obtained in an amorphous state under the reaction conditions of 100 ℃ and 2h in example 1. The XRD peaks of the bismuth sulfide obtained under the reaction conditions of 150 ℃ and 3h in example 2 and 150 ℃ and 12h in example 3 correspond to the peak positions of the standard PDF card one by one, which shows that pure-phase bismuth sulfide is obtained and good crystallinity is shown.
(2) SEM tests of the bismuth sulfide nanosheets, the bismuth sulfide nanotubes and the bismuth sulfide nanorods prepared in examples 1 to 3 show that the results are shown in FIG. 2. As shown in fig. 2 (a) and (d), in example 1, under the reaction conditions of 100 ℃ and 2h, bismuth sulfide nanosheets in the form of uniform nanosheets can be obtained, the diameter of the nanosheets being about 400nm, and the thickness being about several nanometers. As shown in (b) and (e) of FIG. 2, in example 2, under the reaction conditions of 150 ℃ and 3h, bismuth sulfide nanotubes with a diameter of 0.3-1 micron and a length of about 2-3 microns can be obtained. As shown in (c) and (f) of FIG. 2, in example 3, bismuth sulfide nanorods with a diameter of about 100-200 nm and a length of about 2-4 μm can be obtained under the reaction conditions of 150 ℃ and 12h.
(3) The EDS of the bismuth sulfide nanosheets in example 1 is shown in fig. 3, and the results show that the bismuth sulfide nanosheets have a Bi: S of 39.6.
(4) Bismuth sulfide has appropriate band gap (1.3-1.7 eV) and energy band, is a good visible light catalyst, and the specific surface areas of the bismuth sulfide nanosheets, the bismuth sulfide nanotubes and the bismuth sulfide nanorods in the implementation examples 1-3 are measured to be 12.7 m, 14.2 m and 3.4m respectively 2 ·g -1 。
(5) The bismuth sulfide nanosheets, bismuth sulfide nanotubes and bismuth sulfide nanorods of the implementation examples 1-3 were subjected to a photocatalytic rhodamine B decomposition experiment, wherein a 500W xenon lamp (added with a 400nm cut-off filter to retain visible light) was used as a light source, and the results are shown in (a) and (B) of FIG. 4, in which C is shown t The concentration of rhodamine B at time t, namely the concentration of rhodamine B at time t when the bismuth sulfide nano material decomposes rhodamine B for t minutes, C 0 The concentration of rhodamine B at the initial time. In the graph (a), the maximum decomposition efficiency of rhodamine B at 140min reaches 41%. In the diagram (B), the rate constant of the decomposition of the bismuth sulfide nanosheet to rhodamine B under visible light is 4.1 multiplied by 10 -3 min -1 . The specific surface area, the decomposition rate of rhodamine B, the surface catalytic activity and the reaction rate constant are summarized in the following table 1.
TABLE 1 Properties of the products obtained in examples 1-3
Comparative example 1 Water as solvent
1mmol of BiCl 3 、4mmol CH 4 N 2 S, adding 20mL of hydrochloric acid solution (wherein the concentration of HCL is 1 mol/L) into a polytetrafluoroethylene kettle, uniformly stirring, and repeating for 5 times to obtain 5 parts of the same reaction solution;
and then placing the mixture into a homogeneous reaction furnace, reacting for 6h at 150 ℃, for 24h at 150 ℃, for 6h at 180 ℃, for 24h at 200 ℃, filtering, alternately washing the obtained product with alcohol and deionized water for three times, then placing the product into a drying oven, and drying for 12h at 60 ℃ to obtain 5 parts of product, wherein corresponding SEM pictures are respectively shown as (a) - (e) in FIG. 6, and the results show that the shapes of the obtained products are similar and are all nanowires.
Comparative example 2 ethanol as solvent
1mmol of BiCl 3 、4mmol CH 4 N 2 S, adding 10mL of ethanol into a polytetrafluoroethylene kettle, uniformly stirring, and repeating for 6 times to obtain 6 parts of the same reaction solution;
and then placing the mixture into a homogeneous reaction furnace, reacting for 6h at the temperature of 120 ℃, reacting for 12h at the temperature of 120 ℃, reacting for 6h at the temperature of 150 ℃, reacting for 24h at the temperature of 150 ℃, reacting for 6h at the temperature of 180 ℃ and reacting for 12h at the temperature of 180 ℃, filtering, alternately washing the obtained product with alcohol and deionized water for three times, then placing the product into a drying box, drying for 12h at the temperature of 60 ℃ to obtain 6 parts of product, wherein corresponding SEM pictures are respectively shown in (a) - (f) of FIG. 7, and the results show that the obtained products have similar shapes and are all nanorods.
Comparative example 3 ethylene glycol as solvent
1mmol of BiCl 3 、6mmol CH 4 N 2 S, adding 10mL of ethylene glycol into a polytetrafluoroethylene kettle, uniformly stirring, and repeating for 4 times to obtain 4 parts of the same reaction solution;
and then placing the mixture into a homogeneous reaction furnace, reacting for 24 hours at the temperature of 150 ℃, reacting for 12 hours at the temperature of 200 ℃ and reacting for 24 hours at the temperature of 200 ℃, filtering, alternately washing the obtained product with alcohol and deionized water for three times, then placing the product into a drying oven for drying for 12 hours at the temperature of 60 ℃ to obtain 4 parts of products, wherein corresponding SEM pictures are respectively shown as (a) to (d) in FIG. 8, and the results show that the shapes of the obtained products are similar and are all nanoflowers.
In conclusion, the invention provides a bismuth sulfide nano material with controllable morphology, a preparation method and application thereof. The invention adopts solvothermal reaction and uses a single precursor Bi (S) 2 CNEt 2 ) 3 The powder takes aliphatic amine solvent as solvent, does not need any substance regulation (such as a morphology control agent or a pH value regulator), and only simply controlsThe required bismuth sulfide nano materials (nano flaky bismuth sulfide nano materials, nano tubular bismuth sulfide nano materials and nano rod-shaped bismuth sulfide nano materials) with different morphologies and uniformity can be prepared by the reaction time and temperature, and the method is simple, safe and pollution-free. The preparation method realizes the preparation of the bismuth sulfide nano-material with controllable morphology by a simple same preparation method under the same reaction system, and makes up for the blank of realizing the preparation of the bismuth sulfide nano-material with different morphologies by the same preparation method under the same reaction system.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. The preparation method of the bismuth sulfide nano material with controllable morphology is characterized by comprising the following steps:
providing Bi (S) 2 CNEt 2 ) 3 Powder and aliphatic amine solvent;
mixing the Bi (S) 2 CNEt 2 ) 3 And dispersing the powder in the aliphatic amine solvent, and then reacting at a preset reaction temperature for a preset time to obtain the bismuth sulfide nano material with the required morphology.
2. The preparation method of the bismuth sulfide nanomaterial with controllable morphology according to claim 1, wherein the number of carbon atoms in the carbon chain of the aliphatic amine solvent is less than or equal to 3.
3. The method for preparing bismuth sulfide nano-materials with controllable morphology as claimed in claim 2, wherein the aliphatic amine solvent is at least one selected from trimethylamine, monoethylamine, ethylenediamine and propylamine.
4. The method for preparing bismuth sulfide nano-materials with controllable morphology as claimed in claim 1, wherein the Bi (S) is 2 CNEt 2 ) 3 The preparation method of the powder comprises the following steps:
providing an aqueous bismuth nitrate solution and an aqueous sodium diethyldithiocarbamate solution;
dropwise adding the bismuth nitrate aqueous solution into the sodium diethyldithiocarbamate aqueous solution, and reacting to obtain the Bi (S) 2 CNEt 2 ) 3 And (3) powder.
5. The method for preparing bismuth sulfide nano-materials with controllable morphology as claimed in claim 1, wherein the Bi (S) is 2 CNEt 2 ) 3 The ratio of the powder to the aliphatic amine solvent is (0.15-0.3) g: (10-20) mL.
6. The preparation method of the bismuth sulfide nano material with controllable morphology according to claim 1, characterized by reacting at a reaction temperature of 80-200 ℃ for 1-12 h to obtain the bismuth sulfide nano material with the required morphology.
7. The preparation method of the bismuth sulfide nano-material with controllable morphology as claimed in claim 6, characterized in that the reaction is carried out at a reaction temperature of 80-130 ℃ for 0.5-2 h to obtain the nano-flaky bismuth sulfide nano-material;
reacting for 3-6 h at the reaction temperature of 130-150 ℃ to obtain a nano-tube-shaped bismuth sulfide nano-material;
reacting for 8-12 h at the reaction temperature of 130-150 ℃ to obtain the nano-rod-shaped bismuth sulfide nano-material.
8. The bismuth sulfide nano material with controllable morphology is characterized by being prepared by the preparation method of any one of claims 1 to 7.
9. The use of the morphologically controlled bismuth sulfide nanomaterial of claim 8 in the field of photocatalysis.
10. The use of claim 9, wherein the morphology-controlled bismuth sulfide nanomaterial is used as a photocatalyst in photocatalytic decomposition of organic pollutants.
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