Preparation method for phosphorene-polydopamine composite film

A technology of polydopamine and composite membranes, applied in separation methods, chemical instruments and methods, membranes, etc., can solve the problems of damage, reduction of specific surface area, small specific surface area of ​​phosphorene materials, etc., and achieve excellent separation characteristics and good mechanical properties , Good product quality

Inactive Publication Date: 2017-09-29
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0003] Due to the strong van der Waals force between phosphorus atom layers, phosphorene materials are prone to lamination and form a sheet-like structure similar to a thin film. This structure will lead to a large decrease in specific surface area, which will seriously lose the unique adsorption and conductivity of phosphorene. , thermal conductivity and other excellent properties
In addition, the strong chemical activity of phosphorene makes it easy to be corroded by oxygen, water and other substances and lose its original performance.
Phosphorene has poor mechanical properties and oil-water separation performance, and is easily damaged by external force during use, and will lose separation performance due to specific use environment restrictions
[0004] In the prior art, the prepared phosphorene material has a small specific surface area, weak mechanical properties and oil-water separation performance. In addition, there is no good treatment method for the layering phenomenon of phosphorene and the disadvantages of being easily oxidized and corroded, and there is no phosphorus Diene-polydopamine composite film and its synthesis method

Method used

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  • Preparation method for phosphorene-polydopamine composite film

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preparation example Construction

[0022] A preparation method of phosphorene-polydopamine composite film, comprising the following steps:

[0023] Step A, coating phosphorene on conductive metal to make phosphorene electrode. Wherein, the conductive metal is at least one of gold, platinum, silver, copper, iron, nickel, zinc, tin, lead, and stainless steel, and the shape of the conductive metal can be sheet, mesh, rod, or wire or frothy.

[0024] Step B. Disperse the dopamine hydrochloride in the phosphate buffer solution evenly to prepare a dopamine hydrochloride electrolyte solution with a concentration of 0.01-0.5 mol / L.

[0025] Step C, placing the phosphorene electrode and the metal counter electrode in the dopamine hydrochloride electrolyte, and reacting by chronopotentiometry, with a current density of 0.1-5mA / cm 2 , The reaction time is 0.1-72 hours, so as to prepare the phosphorene-polydopamine composite film precursor.

[0026] Step D, soaking the phosphorene-polydopamine composite film precursor i...

Embodiment 1

[0030] A preparation method of phosphorene-polydopamine composite film, comprising the following steps:

[0031] Step a1, coating phosphorene on the nickel foam to make a phosphorene electrode.

[0032] Step b1, dispersing the dopamine hydrochloride in the phosphate buffer solution evenly to prepare a dopamine hydrochloride electrolyte solution with a concentration of 0.02 mol / L.

[0033] Step c1, placing the phosphorene electrode and the gold foil counter electrode in the dopamine hydrochloride electrolyte, and reacting by chronopotentiometry with a current density of 0.1mA / cm 2 , The reaction time is 72h, thereby making the phosphorene-polydopamine composite film precursor;

[0034] Step d1, soaking the phosphorene-polydopamine composite membrane precursor in a hydrochloric acid solution with a pH value of 0.001 for 0.2h, then performing solid-liquid separation, and drying the solid obtained by solid-liquid separation, so as to obtain the following: figure 1 The phosphoren...

Embodiment 2

[0036] A preparation method of phosphorene-polydopamine composite film, comprising the following steps:

[0037] Step a2, coating phosphorene on aluminum foil to make a phosphorene electrode.

[0038] Step b2, dispersing the dopamine hydrochloride in the phosphate buffer solution evenly to prepare a dopamine hydrochloride electrolyte solution with a concentration of 0.1 mol / L.

[0039] Step c2, placing the phosphorene electrode and the aluminum foil counter electrode in the dopamine hydrochloride electrolyte, and reacting by chronopotentiometry with a current density of 0.5mA / cm 2 , The reaction time is 60h, thereby making phosphorene-polydopamine composite film precursor;

[0040] Step d2, soaking the phosphorene-polydopamine composite film precursor in a sulfuric acid solution with a pH value of 0.01 for 6 hours, then performing solid-liquid separation, and drying the solid obtained by solid-liquid separation, thereby preparing phosphorene- Polydopamine composite film.

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Abstract

The invention discloses a preparation method for phosphorene-polydopamine composite film. The preparation method comprises the following steps: coating conductive metal with phosphorene so as to prepare a phosphorene electrode; uniformly dispersing dopamine hydrochloride in a phosphate buffered solution so as to prepare a dopamine hydrochloride electrolyte; placing the phosphorene electrode and a metal counter electrode in the dopamine hydrochloride electrolyte and carrying out a reaction by using chronopotentiometry for 0.1 to 72 h with current density being 0.1 to 5 mA / cm<2> so as to prepare a phosphorene-polydopamine composite film precursor; and soaking the phosphorene-polydopamine composite film precursor in a solution with a pH value of no more than 5 for 0.1 to 72 h so as to prepare the phosphorene-polydopamine composite film. The preparation method provided by the invention can effectively prepare the phosphorene-polydopamine composite film integrating the advantages of both phosphorene and polydopamine, and is simple to operate, low in requirements on equipment, good in product quality, high in yield and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of phosphorene composite materials, in particular to a method for preparing a phosphorene-polydopamine composite film. Background technique [0002] Phosphorene material is a new type of phosphorus nanomaterial that is densely packed into a two-dimensional honeycomb lattice structure by a single layer of phosphorus atoms. Its special microscopic stable structure makes it have excellent electrochemical performance and thermal conductivity. , transportation and other fields have broad application prospects. [0003] Due to the strong van der Waals force between phosphorus atom layers, phosphorene materials are prone to lamination and form a sheet-like structure similar to a thin film. This structure will lead to a large decrease in specific surface area, which will seriously lose the unique adsorption and conductivity of phosphorene. , thermal conductivity and other excellent properties. In addition, the strong chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/60B01D67/00B01D46/54C08G73/06
CPCB01D46/543B01D69/12B01D69/125B01D71/60B01D2323/35C08G73/0672
Inventor 祖雷崔秀国连慧琴
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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