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A kind of two-dimensional material, nano sheet and its preparation method and application

A technology of two-dimensional materials and two-dimensional crystals, applied in the field of chemistry, can solve problems such as uneven distribution of functionalized regions, uncontrollable material properties, and difficulty in achieving covalent functionalization, and achieve the effect of increasing designability

Active Publication Date: 2022-02-18
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, scientists have used post-modification methods, such as covalent reaction with existing functional groups (Chem.Res.2013, 46,31), reactive filling of defect sites on the surface of two-dimensional materials (J.Am.Chem.Soc. 2013,135, 4584), two-dimensional material phase transition reaction, etc. (Nat.Chem.2015,7,45), to realize the covalent functionalization of two-dimensional material surface, but there are still many challenges to be overcome: 1) Two The type, quantity, and spatial distribution of functional groups on the surface of two-dimensional materials cannot be precisely controlled; 2) On the surface of two-dimensional materials, only partial but not full-coverage functionalization can be achieved, and the distribution of functionalized regions is uneven; 3) If there is no pre-existing available 4) The process of chemical functionalization on the surface of post-modified two-dimensional materials is often accompanied by violent chemical reactions, which will bring unpredictable defects, making the functionalized Material properties are uncontrollable

Method used

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  • A kind of two-dimensional material, nano sheet and its preparation method and application
  • A kind of two-dimensional material, nano sheet and its preparation method and application
  • A kind of two-dimensional material, nano sheet and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0076] CuHBT single crystal synthesis: 4-hydroxythiophenol (0.0836g, 0.663mmol) and CuCl 2 2H 2 O (0.0158 g, 0.093 mmol) was added to a round bottom glass bottle with a volume of 10 mL, followed by absolute ethanol (5 mL) at room temperature. Afterwards, the mixture was sonicated in a sonicator for one hour, and then the reaction vial was taken out, and 0.7 mL of 1.25M NaOH was added dropwise thereto. Then put the reaction bottle after adding sodium hydroxide into an oven at 85 degrees Celsius, and finally obtained a yellow cuboid single crystal. After that, the obtained single crystal was washed with ethanol, water, ethanol and ether. Single crystals were then collected by centrifugation. get the molecular formula C 6 h 5 Crystals of CuOS. C 6 h 5 The basic structural unit and two-dimensional structure diagram of CuOS single crystal are shown in figure 2 and image 3 .

Embodiment 2

[0077] Synthesis of Example 2 OMCs series compound nanosheets:

[0078] 1.4-Hydroxythiophenol (0.0850g, 0.674mmol) and CuCl 2 2H 2 O (0.0243 g, 0.143 mmol) was dissolved in absolute ethanol (5 mL) at room temperature, and the resulting mixture was sonicated for one hour, after which 0.5 mL of 1.25M NaOH was added. Afterwards, the resulting reactant was reacted in an oven at 85 degrees Celsius for 12 days, and finally obtained yellow sheet-like nanosheets. Afterwards, the obtained nanosheets were washed with ethanol, deionized water, and ethanol repeatedly three times, and finally washed with ether in turn. Then suction or filter to get C 6 h 5 CuOS nanosheets. Named: CuHBT.

[0079] 2. Mix cuprous oxide (0.0210g, 0.147mmol) and 4-mercaptobenzoic acid (0.0677g, 0.439mmol) in 5mL of deionized water, then add 0.5mL of 12M hydrochloric acid. The resulting mixture is then sonicated for 30 minutes Afterwards, react the reactants obtained by ultrasound in an oven at 85 degrees...

Embodiment 3 2

[0088] The preparation of embodiment 3 two-dimensional material OMCs:

[0089] The OMCs series nanosheets prepared in Example 2 are stripped, and the best stripping conditions are as follows:

[0090] CuHBT: Disperse the CuHBT sample in ethanol to prepare a CuHBT dispersion with a concentration of 0.5mg / mL. Take 5mL of the CuHBT dispersion at a power of 135W, sonicate for 30 minutes, and finally centrifuge at 2000 rpm for 30 minutes. Keep the upper 2 / 3 of the dispersion to obtain a CuHBT two-dimensional material.

[0091] CuMBA: Disperse the CuMBA sample in water to prepare a CuMBA dispersion with a concentration of 1 mg / mL. Take 10 mL of the CuMBA dispersion, sonicate at 200 W for 60 minutes, and finally centrifuge at 5000 rpm for 30 minutes. Keep the upper 2 / 3 of the dispersion to obtain the CuMBA two-dimensional material.

[0092] AgHBT: Disperse the AgHBT sample in ethanol to prepare an AgHBT dispersion with a concentration of 3 mg / mL. Take 10 mL of the AgHBT dispersion,...

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Abstract

The application provides a two-dimensional material having the chemical formula (X‑Y‑Z) a m b , X is selected from hydroxyl, ether group, carboxyl group, aldehyde group, carbonyl group, aliphatic group, nitro group, amino group, amido group, sulfonic acid group, phosphoric acid group, cyano group, thiocyano group, hydrocarbon group, substituted hydrocarbon group, halogen at least One; Y is selected from at least one of hydrocarbon group, substituted hydrocarbon group, heteroaryl group, substituted heteroaryl group; Z is selected from at least one of hydroxyl group, thiol group, selenol group, telluryl group; M is selected from Iron, chromium, manganese, copper, lead, zinc, tin, cobalt, nickel, antimony, mercury, cadmium, bismuth, gold, silver, platinum, ruthenium, rhodium, palladium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, At least one of tungsten, molybdenum, gallium, indium, thallium, germanium, rhenium, scandium, yttrium, thorium and lanthanide metal elements; a and b are each independently 1-6. The functional groups grafted on the surface of the two-dimensional material based on structural design have the advantages of known distribution, distribution area, and modification rate.

Description

technical field [0001] The invention relates to a two-dimensional material, a nanosheet and a preparation method and application thereof, belonging to the field of chemistry. Background technique [0002] Two-dimensional materials, as sheet-like crystalline materials with a thickness of single or multiple atomic / molecular layers, exhibit some unusual physical and chemical properties, making them widely used in electronic / optoelectronic devices, catalysis, sensors, energy storage and conversion, etc. All show good potential application value. At present, the use of covalent bonding to graft organic functional groups onto the surface of two-dimensional materials can further optimize the physical and chemical properties of the original two-dimensional materials, making them have better solvent dispersion (J.Am.Chem.Soc.2008 ,130, 16201), open bandgap (Nat.Mater.2010,9,315), more reactive active sites (Chem. Rev.2012,112,6027), so as to further optimize the material in energy s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C323/20C07C323/34C07C323/09C07C323/62C07C319/02
CPCC07C323/20C07C323/34C07C323/09C07C323/62C07B2200/13H10K85/371
Inventor 徐刚李艳周
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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