Preparation method of alkali metal and alkaline earth metal doped nano black phosphorus

An alkaline earth metal and metal doping technology, applied in the field of nanomaterials, can solve the problems of large differences in nano black phosphorus morphology, uneven doping, difficult alkali metal and alkaline earth metal doping, etc., to avoid oxidation and alkali Metal/alkaline earth metal oxidation, good doping uniformity, and the effect of improving energy storage and hydrogen storage performance

Pending Publication Date: 2021-11-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the problem of inhomogeneous doping during the stripping process and large differences in the morphology of nano black phosphorus, making it difficult to achieve doping with alkali metals and alkaline earth metals.

Method used

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  • Preparation method of alkali metal and alkaline earth metal doped nano black phosphorus
  • Preparation method of alkali metal and alkaline earth metal doped nano black phosphorus
  • Preparation method of alkali metal and alkaline earth metal doped nano black phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the method for preparing Li-doped nano black phosphorus sheets is as follows:

[0027] First, the nano black phosphorus sheet is used as the cathode electrode, the lithium sheet is used as the anode electrode, and the electrolyte is 1mol / L LiN(SO 2 CF 3 ) / ethylene carbonate + diethyl carbonate (volume ratio 1:1), the anode, cathode and electrolyte constitute an electrolytic cell, the anode and cathode are respectively connected to the positive and negative electrodes of the power supply, and the whole process is carried out in the glove box Complete; start the power supply, and react for 120min under the action of a constant voltage of 0.5V; collect the reaction product, then wash it with N-methylpyrrolidone and ethanol for 3 times, the centrifugal speed is 6000r / min, each time is 5min, and finally the solid is in Li-doped nano black phosphorus flakes were obtained by vacuum drying at 40 °C.

[0028] The XPS, Raman, and transmission electron microscope i...

Embodiment 2

[0029] Embodiment 2: the method for preparing Na-doped black phosphorus quantum dots is as follows:

[0030] First, the black phosphorus quantum dots are used as the negative electrode, the sodium sheet is used as the positive electrode, and the electrolyte is 0.5mol / L NaClO 4 / dimethyl carbonate, the positive electrode, the negative electrode and the electrolyte form an electrolytic cell, the positive electrode and the negative electrode are respectively connected to the positive and negative electrodes of the power supply, and the whole process is completed in the glove box; start the power supply, under the action of a constant voltage of 1V, React for 60 minutes; collect the reaction product, then centrifuge and wash 3 times with acetone and ethanol at 12,000 r / min for 10 minutes each time, and finally dry the solid in vacuum at 40°C to obtain Na-doped black phosphorus quantum dots.

Embodiment 3

[0031] Embodiment 3: the method for preparing Mg-doped nano black phosphorus sheets is as follows:

[0032] First, the nanometer black phosphorus sheet is used as the negative electrode, the magnesium sheet is used as the positive electrode, and the electrolyte is 1.5mol / L MgCl 2 / diethyl carbonate + ethyl methyl carbonate (volume ratio 1:1), the anode, cathode and electrolyte constitute an electrolytic cell, the anode and cathode are respectively connected to the positive and negative electrodes of the power supply, the whole process is in the glove box Complete; start the power supply, and react for 30 minutes under the action of a constant voltage of 5V; collect the reaction product, then filter and wash it with N-methylpyrrolidone and ethanol for 3 times, and finally dry the solid in vacuum at 25°C to obtain Mg-doped nano black phosphorus piece.

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Abstract

The invention discloses a preparation method of alkali metal and alkaline earth metal doped nano black phosphorus, the preparation method comprises the following steps: taking nano black phosphorus as a negative electrode, taking alkali metal / alkaline earth metal to be doped as a positive electrode, taking a non-aqueous solution of metal salt as electrolyte, carrying out electrochemical reaction under constant voltage, and obtaining metal cations after metal elementary substance electron loss, reacting electrons of the cathode nano black phosphorus with metal cations so that the metal cations are uniformly doped on the nano black phosphorus; and collecting a reaction product, washing with an organic solvent, and drying to obtain the alkali metal / alkaline earth metal doped nano black phosphorus. The method is simple in process, high in controllability and good in doping effect, and the energy storage and hydrogen storage performance of the nano black phosphorus can be improved by applying the alkali metal and alkaline earth metal doped nano black phosphorus to the fields of alkali metal ion batteries and hydrogen storage.

Description

technical field [0001] The invention relates to a preparation method of alkali metal and alkaline earth metal doped nanometer black phosphorus, which belongs to the technical field of nanomaterials. Background technique [0002] Nano black phosphorus has a special wrinkled structure, large specific surface area, adjustable direct band gap, and excellent carrier mobility. Doping ultra-high conductivity alkali metals and alkaline earth metals in nano black phosphorus can make Nano black phosphorus has superconductivity and has good application prospects in the fields of alkali metal ion batteries, hydrogen storage and field effect transistors. However, alkali metals and alkaline earth metals are more active and difficult to dope. At present, the reported methods of doping black phosphorus include atomic layer deposition, electrochemical method, ball milling method, high temperature and high pressure method, and chemical vapor transport. Compared with other methods, the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/01C25B1/50C25B9/60C25B11/042
CPCC25B1/01C25B1/50C25B9/60C25B11/042
Inventor 廉培超李雪梅梅毅牛丽辉陈鑫智
Owner KUNMING UNIV OF SCI & TECH
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