Polydopamine modified transition metal chalcogenide nano-sheet and preparation method thereof

A technology of transition metal chalcogenides and polydopamine, which is applied in the direction of binary selenium/tellurium compounds, molybdenum sulfide, nanotechnology, etc., can solve the problems of insufficient stability of surface modification methods, lack of surface modification strategies, and weak hydrophobic interactions. Achieve the effect of simple and efficient preparation method, low price and good reproducibility

Inactive Publication Date: 2018-08-17
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, two-dimensional transition metal chalcogenide nanosheets are prone to agglomeration and insufficient stability in complex solution environments.
In recent years, many research groups have been exploring the surface modification methods of two-dimensional transition metal chalcogenide nanosheets and have made a series of progress. However, due

Method used

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  • Polydopamine modified transition metal chalcogenide nano-sheet and preparation method thereof
  • Polydopamine modified transition metal chalcogenide nano-sheet and preparation method thereof
  • Polydopamine modified transition metal chalcogenide nano-sheet and preparation method thereof

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Effect test

Embodiment 1

[0028] Add 120 μL of 10 mg / mL dopamine solution and 2 mL of 0.1 mg / mL molybdenum disulfide solution into a 50 mL jar containing 20 mL of Tris-HCl buffer solution, and sonicate in a water bath at 40 °C for 1 h. Wash with ultrapure water several times, centrifuge at 8000 rpm, and centrifuge for 40 minutes, and disperse the final product in ultrapure water to obtain polydopamine-modified molybdenum disulfide nanosheets. figure 1 The molybdenum disulfide nanosheets modified by polydopamine have regular appearance and uniform dispersion, and the size of the nanosheets is about 200nm-400nm. From figure 2 It can be seen that the prepared polydopamine-modified molybdenum disulfide nanosheets have a thickness of about 5 nm.

Embodiment 2

[0030] Add 120 μL of 10 mg / mL dopamine solution and 2 mL of 0.1 mg / mL molybdenum disulfide solution into a 50 mL jar containing 20 mL of Tris-HCl buffer solution, and sonicate in a water bath at 30 °C for 3 h. Wash with ultrapure water several times, centrifuge at 12,000 rpm, and centrifuge for 30 minutes, and disperse the final product in ultrapure water to obtain polydopamine-modified molybdenum disulfide nanosheets. image 3 The molybdenum disulfide nanosheets modified by polydopamine have regular appearance and uniform dispersion, and the size of the nanosheets is about 200nm-450nm. From Figure 4 It can be seen that the prepared polydopamine-modified molybdenum disulfide nanosheets have a thickness of about 6 nm.

Embodiment 3

[0032] Add 120 μL of 10 mg / mL dopamine solution and 2 mL of 0.1 mg / mL molybdenum disulfide solution into a 50 mL jar containing 20 mL of Tris-HCl buffer solution, and ultrasonicate in a water bath at 20 °C for 6 h. Wash with ultrapure water several times, centrifuge at 12,000 rpm, and centrifuge for 30 minutes, and disperse the final product in ultrapure water to obtain polydopamine-modified molybdenum disulfide nanosheets. Figure 5 The molybdenum disulfide nanosheets modified by polydopamine have regular appearance and uniform dispersion, and the size of the nanosheets is about 250nm-400nm. From Figure 6 It can be seen that the prepared polydopamine-modified molybdenum disulfide nanosheets have a thickness of about 6.5 nm.

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Abstract

The invention discloses a preparation method of a polydopamine modified transition metal chalcogenide nano-sheet. The method includes the steps: preparing dopamine transparency water solution and transition metal chalcogenide water solution, and enabling the molar ratio of dopamine to transition metal chalcogenides to be (3-5):1; preparing trihydroxymethyl aminomethane hydrochloride (Tris-HCL) buffer solution with the concentration of 10mM and a pH (potential of hydrogen) value of 8.5; transferring the solution prepared in the steps into a wild-mouth bottle to mix the solution, and placing thewild-mouth bottle with the solution into a water-bath ultrasonic instrument to perform water-bath ultrasonic reaction for 1h-6h under ultrasonic power of 65KHz; washing products in the steps by the aid of ultra-pure water, performing centrifugal purification, dispersing the finally-prepared products into the ultra-pure water, and storing the products in a refrigerator of 4 DEG C. The preparationmethod is simple and efficient and good in reproducibility and meets environment-friendly requirements, mass production is facilitated, and the polydopamine modified transition metal chalcogenide nano-sheet prepared by the method is low in cost, normalized in shape, uniform in size and uniform to disperse.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and more specifically relates to a novel polydopamine-modified transition metal chalcogenide nanosheet and a preparation method thereof. Background technique [0002] Since 2004, graphene, as a typical two-dimensional nanomaterial, has been widely used in optoelectronic devices, energy, catalysis, biomedicine and many other fields due to its unique properties. In recent years, new two-dimensional nanomaterials with graphene-like two-dimensional structure have become a new research hotspot, including boron nitride (BN), two-dimensional transition metal chalcogenide nanosheets and other nanomaterials. Among them, two-dimensional transition metal chalcogenides have become new research materials in the fields of physics, chemistry and material science, such as MoS 2 、MoSe 2 、WS 2 、WSe 2 Wait. Two-dimensional transition metal chalcogenides are sandwich structures composed of one la...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y40/00C01B19/04
Inventor 汪联辉宇文力辉孙一婷翁丽星
Owner NANJING UNIV OF POSTS & TELECOMM
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