Polydopamine modified black phosphorus, and preparation method and applications thereof

A technology of polydopamine and dopamine hydrochloride, applied in the field of materials, can solve the problems of large pollution of organic solvents, loss of two-dimensional structure of black phosphorus, difficulty in large-scale production, etc., and achieves environmental friendliness, simple production process, and low-cost large-scale production. Effect

Inactive Publication Date: 2018-08-07
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above modification methods use chemical or physical methods to reduce the contact opportunities of black phosphorus with oxygen and water, and slow down the degradation rate of black phosphorus in the environment. Chemical grafting on phosphorus, such as grafting diazobenzene derivatives or titanium ligands, these methods are complicated in process, low in yield, and difficult to produce on a large scale; while polymer wrapping such as PLGA uses a large amount of polymer to wrap a small amount of Black phosphorus has lost the two-dimensional structure of black phosphorus, and the preparation process requires the use of highly polluting organic solvents, causing pollution to the environment

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  • Polydopamine modified black phosphorus, and preparation method and applications thereof
  • Polydopamine modified black phosphorus, and preparation method and applications thereof
  • Polydopamine modified black phosphorus, and preparation method and applications thereof

Examples

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Embodiment 1

[0031] This embodiment provides a method for preparing polydopamine-modified black phosphorus, comprising the following steps:

[0032] (1) Weigh 25 mg of black phosphorus block in an oxygen-free environment, grind it in N-methylpyrrolidone to obtain a 1 mg / mL dispersion; use a 1200W probe to sonicate for 10 hours, and use a 400W probe to sonicate for 10 hours in a low-temperature water bath get the supernatant after getting the dispersion liquid with 4000rpm centrifugal 10min, and get the precipitate after the centrifugal 10min of the supernatant with 7000rpm, then the precipitate is dispersed successively in dehydrated alcohol and aqueous solution to repeat the above-mentioned centrifugation steps, and finally obtain the black phosphorus material ( BP).

[0033] (2) Weigh 4, 10, 20, 30, 40 mg of dopamine hydrochloride respectively, dissolve them in 5 mL of aqueous solution, add 1 mg of the above-mentioned black phosphorus material, ultrasonically disperse for 20 min, and adj...

Embodiment 2

[0040] This embodiment provides a method for preparing polydopamine-modified black phosphorus, comprising the following steps:

[0041] (1) Weigh 25 mg of black phosphorus block in an oxygen-free environment, grind it in N-methylpyrrolidone to obtain a 1 mg / mL dispersion; use a 1200W probe to sonicate for 10 hours, and use a 400W probe to sonicate for 10 hours in a low-temperature water bath get the supernatant after getting the dispersion liquid with 4000rpm centrifugal 10min, and get the precipitate after the centrifugal 10min of the supernatant with 7000rpm, then the precipitate is dispersed successively in dehydrated alcohol and aqueous solution to repeat the above-mentioned centrifugation steps, and finally obtain the black phosphorus material ( BP).

[0042] (2) Weigh 1 mg of dopamine hydrochloride, dissolve it in 5 mL of aqueous solution, add 1 mg of the above-mentioned black phosphorus material, disperse by ultrasonic for 20 min, adjust the pH value of the solution to ...

Embodiment 3

[0044] This embodiment provides a method for preparing polydopamine-modified black phosphorus, comprising the following steps:

[0045] (1) Weigh 25 mg of black phosphorus block in an oxygen-free environment, grind it in N-methylpyrrolidone to obtain a 1 mg / mL dispersion; use a 1200W probe to sonicate for 10 hours, and use a 400W probe to sonicate for 10 hours in a low-temperature water bath get the supernatant after getting the dispersion liquid with 4000rpm centrifugal 10min, and get the precipitate after the centrifugal 10min of the supernatant with 7000rpm, then the precipitate is dispersed successively in dehydrated alcohol and aqueous solution to repeat the above-mentioned centrifugation steps, and finally obtain the black phosphorus material ( BP).

[0046] (2) Weigh 1 mg of dopamine hydrochloride, dissolve it in 5 mL of aqueous solution, add 1 mg of the above-mentioned black phosphorus material, and disperse it ultrasonically for 20 min. Adjust the pH value of the solu...

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Abstract

The invention discloses a polydopamine modified black phosphorus, and a preparation method and applications thereof. The polydopamine modified black phosphorus comprises black phosphorus and polydopamine attached to the surface of the black phosphorus. The black phosphorus is coated with a uniform layer of polydopamine, so that the black phosphorus is isolated from oxygen and water vapor completely, and the black phosphorus stability is increased. The polydopamine modified black phosphorus possesses relatively excellent photothermal conversion performance and biocompatibility, is promising tobe applied in the fields such as photoelectric field and biological medical science. The invention also provides a preparation method of the polydopamine modified black phosphorus; the preparation method is simple; yield is high; the polydopamine modified black phosphorus is friendly to the environment; and low cost large scale production can be realized.

Description

technical field [0001] The invention relates to the field of materials, in particular to a polydopamine-modified black phosphorus and its preparation method and application. Background technique [0002] As an emerging two-dimensional material, black phosphorus (BP) has a sheet structure similar to graphene, and its wrinkled structure and tunable natural band gap make it have unique in-plane anisotropy and extraordinary physical properties , studies have shown that black phosphorus has an ultra-high specific surface area and good biocompatibility, and is widely used in the biomedical field as a drug sustained-release carrier and an integrated material for cancer diagnosis and treatment, such as in the journal Advanced Materials, 2017, Volume 1, Issue 29 Black Phosphorus Nanosheets as a Robust Delivery Platform for Cancer Theranostics reported that black phosphorus can be used as a drug carrier for cancer treatment, and black phosphorus has high photothermal conversion effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/00C08G73/06A61K47/34A61K47/04
CPCC01B25/006A61K47/02A61K47/34C08G73/0672
Inventor 喻学锋游柏浩邵俊东杨娜
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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