Single-walled carbon nanotube confinement single-layer transition metal chalcogenide nanobelt and precise preparation method and application thereof

Abstract

The invention discloses a single-walled carbon nanotube confined single-layer transition metal chalcogenide nanobelt as well as a precise preparation method and application thereof, and the nanobelt comprises a single-walled carbon nanotube and transition metal sulfide or selenide or sulfur selenide attached to the single-walled carbon nanotube, and the transition metal sulfide or selenide or sulfur selenide forms a single-layer nanobelt. The preparation method comprises the following steps: mixing polyacid containing transition metal with a single-walled carbon nanotube and water to obtain a precursor, and carrying out gas-phase vulcanization or selenylation on the confinement precursor to obtain the high-quality single-layer confinement transition metal sulfide or selenide nanobelt. After the single-layer confinement transition metal sulfide or selenide nanobelt is obtained, the nanobelt is subjected to gas phase vulcanization (aiming at the selenide nanobelt) or selenylation (aiming at the sulfide nanobelt), the high-quality single-layer confinement transition metal sulfide selenide nanobelt is obtained, the process is simple, large-scale production is easy, and a foundation is provided for production of nanobelts of the same kind.

Description

Technical Field

[0001] The present invention relates to a single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon and a precise preparation method and application thereof, belonging to the technical field of transition metal chalcogenide preparation. Background Art

[0002] The research on one-dimensional transition metal chalcogenides (TMDs) has recently revealed some interesting physical phenomena, including the quantum spin Hall effect, valley polarization, and superconductivity, indicating their potential applications in functional devices. Applying additional confinement in two-dimensional (2D) materials can further control their electronic, optical, and topological properties. However, the synthesis of one-dimensional single-layer high-quality transition metal chalcogenides still has difficulties because the anisotropy of their own structure tends to two-dimensional growth; due to the different melting points of different metal or metal oxide precursors, the precise synthesis of bimetallic, trimetallic, and their high-entropy metal chalcogenide nanoribbons has not been achieved yet; the general strategy for large-scale synthesis also has certain challenges. Summary of the Invention

[0003] The purpose of the present invention is to provide a single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon and a precise preparation method and application thereof. By using the method of gas-phase sulfidation and / or selenization to confine polyoxometalate precursors, high-quality single-layer confined transition metal chalcogenide nanoribbons can be obtained. The process is simple and easy to scale up, providing a basis for the production of similar nanoribbons.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon, comprising single-walled carbon nanotubes and a transition metal sulfide or selenide or sulfur selenide attached inside the single-walled carbon nanotubes, and the transition metal sulfide or selenide or sulfur selenide forms a single-layer nanoribbon.

[0005] The precise preparation method of the above single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon comprises the following steps: S1. Mix a polyoxometalate containing a transition metal with single-walled carbon nanotubes and water, then wash, centrifuge, and dry to obtain a precursor. S2. Place sulfur powder or selenium powder and the precursor in a tube furnace. After replacing the gas in the tube furnace with a mixed gas of hydrogen and argon, heat the sulfur powder or selenium powder and the precursor respectively, and then continuously introduce the mixed gas of hydrogen and argon to drive the sulfur powder or selenium powder to react with the precursor. After completion, cool down to obtain a single-walled carbon nanotube-confined monolayer transition metal sulfide nanoribbon or selenide nanoribbon. Or place the precursor in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen sulfide and argon, heat the precursor, and then continuously introduce the mixed gas of hydrogen sulfide and argon for reaction. After completion, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons.

[0006] Preferably, after obtaining the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons, place the selenium powder and the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen and argon, heat the selenium powder and the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons respectively, and then continuously introduce the mixed gas of hydrogen and argon to drive the selenium powder to react with the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons. After completion, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfoselenide nanoribbons.

[0007] Preferably, after obtaining the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons, place the sulfur powder and the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen and argon, heat the sulfur powder and the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons respectively, and then continuously introduce the mixed gas of hydrogen and argon to drive the sulfur powder to react with the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons. After completion, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfoselenide nanoribbons; Or place the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen sulfide and argon, heat the precursor, and then continuously introduce the mixed gas of hydrogen sulfide and argon for reaction. After completion, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfoselenide nanoribbons.

[0008] Preferably, in step S1, the polyoxometalate is Anderson-type and / or Keggin-type and / or Dawson-type and / or Weaklysandwich-type polyoxometalate.

[0009] Preferably, in step S1, the mass ratio of the polyoxometalate to the single-walled carbon nanotubes and water is (80 - 160):(3 - 8):1.

[0010] Preferably, in step S1, the mixing duration is 6 - 10 d; the drying condition is: 50 - 70 °C.

[0011] Preferably, the volume content of hydrogen in the mixed gas of hydrogen and argon is 5 - 15%, and the volume content of hydrogen sulfide in the mixed gas of hydrogen sulfide and argon is 3 - 8%; the flow rate of the mixed gas is 20 - 80 sccm.

[0012] Preferably, the target heating temperature of sulfur powder or selenium powder is 180 - 320 °C, and the target heating temperatures of the precursor, single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons, and single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons are 550 - 800 °C, with a heating-up time of 20 - 80 min; the reaction time is 1 - 2 h for all of them.

[0013] The above-mentioned single-walled carbon nanotube-confined single-layer transition metal chalcogenide nanoribbons are applied in photodetectors, photoelectric sensors, and the catalytic field.

[0014] The beneficial effects of the present invention are as follows: By using the method of gas-phase sulfidation or selenization to confine polyoxometalate precursors, high-quality single-layer confined transition metal chalcogenide nanoribbons can be obtained; and after obtaining single-layer confined transition metal sulfide or selenide nanoribbons, gas-phase sulfidation (for selenide nanoribbons) or selenization (for sulfide nanoribbons) of the nanoribbons can be carried out to obtain high-quality single-layer confined transition metal chalcogenide (sulfoselenide) nanoribbons. The average width of the obtained single-layer nanoribbons is only about 2.0 nm, showing great application prospects in aspects such as photodetectors, photoelectric sensors, and catalysis. Compared with the existing chemical vapor deposition method on a substrate, this method can achieve the synthesis of up to fifty kinds of high-quality single-layer confined transition metal chalcogenide nanoribbons with an average width of only about 2.0 nm, and the process is simple and easy to scale up production. Description of the Drawings

[0015] Figure 1 It is the spherical aberration electron microscope photograph of the nanoribbons prepared in Example 1; Figure 2 It is the Raman spectrum of the nanoribbons prepared in Example 1; Figure 3 It is the X-ray photoelectron spectra of (a) Mo and (b) S of the nanoribbons prepared in Example 1; Figure 4 It is the spherical aberration electron microscope photograph of the nanoribbons prepared in Example 2; Figure 5 It is the Raman spectrum of the nanoribbons prepared in Example 2; Figure 6 It is the X-ray photoelectron spectra of (a) Mo, (b) W, and (c) S of the nanoribbons prepared in Example 2; Figure 7 It is the spherical aberration electron microscope photograph of the nanoribbons prepared in Example 3; Figure 8 It is the Raman spectrum of the nanoribbons prepared in Example 3; Figure 9 It is the X-ray photoelectron spectra of (a) Mo, (b) W, (c) V, and (d) S of the nanoribbons prepared in Example 3; Figure 10 Aberration-corrected electron microscopy image of the nanoribbons prepared in Example 4; Figure 11 Raman spectrum of the nanoribbons prepared in Example 4; Figure 12 X-ray photoelectron spectroscopy spectra of Mo (a), W (b), V (c), Co (d), and S (e) of the nanoribbons prepared in Example 4; Figure 13 Aberration-corrected electron microscopy image of the nanoribbons prepared in Example 5; Figure 14 Raman spectrum of the nanoribbons prepared in Example 5; Figure 15 X-ray photoelectron spectroscopy spectra of Mo (a), W (b), Co (c), V (d), S (e), and Se (f) of the nanoribbons prepared in Example 5; Figure 16 Transmission electron microscopy images of the stacked nanosheets prepared in Comparative Example 1 at different magnifications, (a) 100 nm scale bar, (b) 50 nm scale bar. Detailed Description of the Invention

[0016] To further illustrate the present invention, the single-walled carbon nanotube-confined synthesis of monolayer transition metal chalcogenide nanoribbons and their precise preparation method and application provided by the present invention will be described in detail below in conjunction with examples.

[0017] Example 1: A method for preparing single-walled carbon nanotube-confined monolayer molybdenum disulfide nanoribbons, comprising the following steps: a) Stir 800 mg of polyoxometalate phosphomolybdic acid, 50 mg of open-ended single-walled carbon nanotubes, and 10 mg of deionized water together for 6 days, wash 10 times with water and then centrifuge, and then dry in an oven at 60 °C to obtain a uniform powder as a reaction precursor; b) Place 1 g of sulfur powder and 50 mg of the above reaction precursor in a corundum boat and place them in a two-zone tube furnace. The sulfur powder is located upstream of the gas flow, and the reaction precursor is located downstream of the gas flow; c) Pass a mixture of 60 sccm of argon and hydrogen (ratio 9:1) into the tube. After heating for 60 min, the positions of the sulfur powder and the precursor powder reach 200 °C and 800 °C respectively. After reacting for 60 min, stop heating and continue to cool the product to room temperature with the gas flowing. d) Take out the product obtained in step c to obtain single-walled carbon nanotube-confined monolayer molybdenum disulfide nanoribbons.

[0018] The prepared single-walled carbon nanotube-confined monolayer molybdenum disulfide nanoribbons were characterized by aberration-corrected electron microscopy, and the results are shown in Figure 1 , Figure 1is the aberration-corrected electron microscopy image of the single-walled carbon nanotube-confined monolayer molybdenum disulfide nanoribbon prepared in Example 1. It can be seen from Figure 1 that the molybdenum disulfide is a single-layer one-dimensional nanoribbon structure with an average width of 2.0 nm. The material contrast is uniform, indicating uniform growth of the material without obvious defects. The single-layer nanoribbon and clear boundaries demonstrate high crystallinity of the material.

[0019] Figure 2 is the Raman spectrum of the single-walled carbon nanotube-confined monolayer molybdenum disulfide nanoribbon. The positions of the characteristic peaks confirm that the material is molybdenum disulfide and single-walled carbon nanotubes.

[0020] Figure 3 is the photoelectron spectrum of the single-walled carbon nanotube-confined monolayer molybdenum disulfide nanoribbon. The nanoribbon is composed of molybdenum and sulfur.

[0021] Example 2: Preparation method of single-walled carbon nanotube-confined monolayer molybdenum tungsten disulfide nanoribbon. In step a), 800 mg of heteropolyacid phosphomolybdotungstic acid is used, and the rest is the same as in Example 1. The single-walled carbon nanotube-confined monolayer molybdenum tungsten disulfide nanoribbon is prepared. Its aberration-corrected electron microscopy image, Raman spectrum, and photoelectron spectrum are respectively as shown in Figure 4 、 5 、6.

[0022] Figure 4 is the aberration-corrected electron microscopy image of the single-walled carbon nanotube-confined monolayer molybdenum tungsten disulfide nanoribbon prepared in Example 2. It can be seen from Figure 4 that the molybdenum tungsten disulfide is a single-layer one-dimensional nanoribbon structure with an average width of 2.0 nm. The material contrast is uniform, and the bright and dark phases of tungsten and molybdenum elements indicate uniform growth of the material without obvious defects. The single-layer nanoribbon and clear boundaries demonstrate high crystallinity of the material.

[0023] Figure 5 is the Raman spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten disulfide nanoribbon. The positions of the characteristic peaks confirm that the material is molybdenum tungsten disulfide and single-walled carbon nanotubes.

[0024] Figure 6 is the photoelectron spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten disulfide nanoribbon. The nanoribbon is composed of molybdenum, tungsten, and sulfur.

[0025] Example 3: Preparation method of single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium disulfide nanoribbon. In step a), 800 mg of the heteropolyacid is a mixture of phosphomolybdovanadic acid and phosphotungstovanadic acid with a molar ratio of 2:1. The rest is the same as in Example 1. The single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium disulfide nanoribbon is prepared. Its aberration-corrected electron microscopy image, Raman spectrum, and photoelectron spectrum are respectively as shown in Figure 7 、 8 、9.

[0026] Figure 7 is the aberration-corrected electron microscopy image of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium disulfide nanoribbon prepared in Example 3. It can be seen from Figure 7 that the molybdenum tungsten vanadium disulfide is a monolayer one-dimensional nanoribbon structure with an average width of 2.0 nm. The material contrast is uniform, and the elements of tungsten, molybdenum, and vanadium are light and dark alternately, indicating that the material grows uniformly without obvious defects. The monolayer nanoribbon and the clear boundary indicate that the material has high crystallinity.

[0027] Figure 8 is the Raman spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium disulfide nanoribbon prepared. The positions of the characteristic peaks confirm that the material is molybdenum tungsten vanadium disulfide and single-walled carbon nanotubes.

[0028] Figure 9 is the photoelectron spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium disulfide nanoribbon prepared. The nanoribbon is composed of molybdenum, tungsten, vanadium, and sulfur.

[0029] Example 4: Preparation method of single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfide nanoribbon. In step a), 1000 mg of polyoxometalate is a mixture of phosphocobaltmolybdic acid and phosphovanadic acid with a molar ratio of 2:1. The rest is the same as in Example 1. The single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfide nanoribbon is prepared. Its aberration-corrected electron microscopy image, Raman spectrum, and photoelectron spectrum are respectively as shown in Figure 10 , 11 , and Figure 12.

[0030] Figure 10 is the aberration-corrected electron microscopy image of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfide nanoribbon prepared in Example 4. It can be seen from Figure 1 that the molybdenum tungsten vanadium cobalt disulfide is a monolayer one-dimensional nanoribbon structure with an average width of 2.0 nm. The material contrast is uniform, and the elements of tungsten, molybdenum, vanadium, and cobalt are light and dark alternately, indicating that the material grows uniformly without obvious defects. The monolayer nanoribbon and the clear boundary indicate that the material has high crystallinity.

[0031] Figure 11 is the Raman spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfide nanoribbon prepared. The positions of the characteristic peaks confirm that the material is molybdenum tungsten vanadium cobalt disulfide and single-walled carbon nanotubes.

[0032] Figure 12 is the photoelectron spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfide nanoribbon prepared. The nanoribbon is composed of molybdenum, tungsten, vanadium, cobalt, and sulfur.

[0033] Example 5: Preparation method of single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt diselenide nanoribbon, including the following steps: In step a), 1000 mg of polyoxoacid is a mixture of phosphocobaltmolybdatotungstic acid and phosphovanadic acid with a molar ratio of 2:1, and the rest is the same as step a) in Example 1; In step b), sulfur powder is changed to selenium powder, and the rest is the same as step b) in Example 1; In step c), the position of the precursor powder reaches 750 °C, and the rest is the same as step c) in Example 1; In step d), the product obtained in step c) is taken out to obtain molybdenum tungsten vanadium cobalt diselenide nanobelts confined by single-walled carbon nanotubes; In step e), the precursor in step 1b) is changed to molybdenum tungsten vanadium cobalt diselenide nanobelts confined by single-walled carbon nanotubes, and the subsequent steps of Example 1 are the same to obtain single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfoselenide nanobelts. The aberration-corrected electron microscopy image, Raman spectrum, and X-ray photoelectron spectroscopy of the product are respectively as Figure 13 、 14 、shown in Figure 15.

[0034] Figure 13 Figure 16 is the aberration-corrected electron microscopy image of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfoselenide nanobelts prepared in Example 5. It can be seen from Figure 1 that molybdenum tungsten vanadium cobalt disulfoselenide is a monolayer one-dimensional nanobelt structure with an average width of 2.0 nm. The material contrast is uniform, and the elements of tungsten, molybdenum, vanadium, cobalt, and selenium are alternately bright and dark. The selenide is mainly distributed at the edge of the nanobelt, and the sulfide is mainly distributed in the middle of the nanobelt, indicating that the material grows uniformly without obvious defects. The monolayer nanobelt and the clear boundary indicate high crystallinity of the material.

[0035] Figure 14 Figure 17 is the Raman spectrum of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfoselenide nanobelts prepared. The positions of the characteristic peaks confirm that the material is molybdenum tungsten vanadium cobalt disulfoselenide and single-walled carbon nanotubes.

[0036] Figure 15 Figure 18 is the X-ray photoelectron spectroscopy of the single-walled carbon nanotube-confined monolayer molybdenum tungsten vanadium cobalt disulfoselenide nanobelts prepared. The nanobelt is composed of molybdenum, tungsten, vanadium, cobalt, sulfur, and selenium.

[0037] It can be seen from the above examples that the present application prepares single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanobelts through a simple method.

[0038] Comparative Example 1: A method for preparing molybdenum disulfide nanosheets includes the following steps: a) Place 50 mg of phosphomolybdic acid in a corundum boat and place it at the center position of a tube furnace. Introduce 30 sccm of 5% (volume content) hydrogen sulfide and 95% (volume content) argon into the tube. After heating for 60 min to reach 800 °C, stop heating after reacting for 60 min, and continue to cool the product to room temperature with the furnace while maintaining the gas flow; b) Take out the product obtained in step a to obtain molybdenum disulfide nanosheets.

[0039] Characterize the prepared molybdenum disulfide nanosheets by transmission electron microscopy, and the results are shown in Figure 16 , Figure 16 is a transmission electron microscopy photograph of the molybdenum disulfide nanosheets prepared in Comparative Example 1. It can be seen from Figure 16 that molybdenum disulfide is stacked by multiple layers of flakes.

Claims

1. A single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon, characterized in that, It includes single-walled carbon nanotubes and transition metal sulfides or selenides or sulfoselenides attached inside the single-walled carbon nanotubes, and the transition metal sulfides or selenides or sulfoselenides form single-layer nanoribbons.

2. The precise preparation method of the single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon according to claim 1, characterized in that, It includes the following steps: S1. Mix a polyoxoacid containing a transition metal with single-walled carbon nanotubes and water, then wash, centrifuge, and dry to obtain a precursor. S2. Place sulfur powder or selenium powder and the precursor in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen and argon, heat the sulfur powder or selenium powder and the precursor separately, then continuously introduce the mixed gas of hydrogen and argon to drive the sulfur powder or selenium powder to react with the precursor. After the reaction ends, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons or selenide nanoribbons. Or place the precursor in a tubular furnace, replace the gas in the tubular furnace with a mixed gas of hydrogen sulfide and argon, heat the precursor, then continuously introduce the mixed gas of hydrogen sulfide and argon to react. After the reaction ends, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons.

3. The precise preparation method of the single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon according to claim 2, wherein, After obtaining single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons, place selenium powder and the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen and argon, heat the selenium powder and the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons separately, then continuously introduce the mixed gas of hydrogen and argon to drive the selenium powder to react with the single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbons. After the reaction ends, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfoselenide nanoribbons.

4. The precise preparation method of the single-walled carbon nanotube-confined single-layer transition metal chalcogenide nanoribbon according to claim 2, characterized in that, After obtaining single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons, place sulfur powder and the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons in a tubular furnace. After replacing the gas in the tubular furnace with a mixed gas of hydrogen and argon, heat the sulfur powder and the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons separately, then continuously introduce the mixed gas of hydrogen and argon to drive the sulfur powder to react with the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons. After the reaction ends, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfoselenide nanoribbons. Or place the single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbons in a tubular furnace, replace the gas in the tubular furnace with a mixed gas of hydrogen sulfide and argon, heat the precursor, then continuously introduce the mixed gas of hydrogen sulfide and argon to react. After the reaction ends, cool down to obtain single-walled carbon nanotube-confined single-layer transition metal sulfoselenide nanoribbons.

5. The precise preparation method of the single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon according to claim 2, wherein In step S1, the polyoxoacid is Anderson-type and / or Keggin-type and / or Dawson-type and / or Weakly sandwich-type polyoxoacid.

6. The precise preparation method of the single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon according to claim 2, characterized in that, In step S1, the mass ratio of the polyoxoacid to the single-walled carbon nanotubes and water is (80 - 160):(3 - 8):

1.

7. The precise preparation method of the single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon according to claim 2, wherein In step S1, the mixing duration is 6 - 10 d; the drying condition is: 50 - 70 °C.

8. The precise preparation method of the single-walled carbon nanotube-confined monolayer transition metal chalcogenide nanoribbon according to any one of claims 2-4, characterized in that, In the mixed gas of hydrogen and argon, the volume content of hydrogen is 5 - 15%, and in the mixed gas of hydrogen sulfide and argon, the volume content of hydrogen sulfide is 3 - 8%; the flow rate of the mixed gas is 20 - 80 sccm.

9. The precise preparation method of the single-walled carbon nanotube-confined single-layer transition metal chalcogenide nanoribbon according to any one of claims 2-4, characterized in that, The heating target temperature of sulfur powder or selenium powder is 180 - 320 °C, and the heating target temperature of the precursor, single-walled carbon nanotube-confined single-layer transition metal sulfide nanoribbon, and single-walled carbon nanotube-confined single-layer transition metal selenide nanoribbon is 550 - 800 °C, and the heating-up duration is 20 - 80 min; the reaction duration is 1 - 2 h.

10. Application of the single-walled carbon nanotube-confined single-layer transition metal chalcogenide nanoribbon according to claim 1 in photodetectors, photoelectric sensors, and the catalytic field.

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