Black phosphorus/precious metal composite material as well as preparation method and application thereof

A composite material, precious metal technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc. The effect of good performance and excellent physical and chemical properties

Active Publication Date: 2017-12-15
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that black phosphorus is easily oxidized so that the structure and functi...

Method used

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  • Black phosphorus/precious metal composite material as well as preparation method and application thereof
  • Black phosphorus/precious metal composite material as well as preparation method and application thereof
  • Black phosphorus/precious metal composite material as well as preparation method and application thereof

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preparation example Construction

[0035] The present invention also provides a method for preparing the above-mentioned black phosphorus / noble metal composite material, comprising the following steps: mixing the organic solution of noble metal nanoparticles and / or noble metal alloy nanoparticles with black phosphorus, heating up and reacting, and separating the solid in the reaction system, A black phosphorus / noble metal composite material is obtained. The temperature-rising reaction process is to stir and react at 20-100° C. for 15-30 hours under a protective gas atmosphere, and then reflux at 25-300° C. for 1-40 hours. The temperature-rising reaction process is under a protective gas atmosphere, stirring and reacting at 28-60°C for 23-25 ​​hours, and then refluxing at 40-200°C for 1-40 hours.

[0036]In a preferred embodiment, the black phosphorus is modified black phosphorus, further, the modified black phosphorus is amino-modified or thiol-modified black phosphorus. The amino-modified or mercapto-modified...

Embodiment 1

[0041] The black phosphorus / ultrasmall platinum nanoparticle composite was prepared using the following steps:

[0042] 1) Amino modification of black phosphorus nanosheets: Disperse 0.1 g of black phosphorus nanosheets into 50 mL of isopropanol (HPLC grade), then add 0.1 mL of 3-amino-4-hydroxybenzenesulfonic acid (APS), at 70 ° C Reflux for 10 hours, then centrifuge, wash the solid part with a mixture of absolute ethanol and water, and redisperse in 150 mL of absolute ethanol to obtain a dispersion of amino-modified black phosphorus nanosheets.

[0043] 2) Preparation of ultra-small platinum nanoparticles on the surface of black phosphorus nanosheets. Get 3mL of the amino-modified black phosphorus nanosheet dispersion prepared in step 1), add it to the mixed solution of 20mL absolute ethanol, 125mL deionized water and 0.2mL ammonia solution (28wt%), add 0.3g ten Sodium dialkylbenzene sulfonate (SDBS), stir well. Make resorcinol into a 25g / L solution, and potassium tetrachl...

Embodiment 2

[0052] The black phosphorus / ultrasmall platinum-palladium alloy nanoparticle composite was prepared by the following steps:

[0053] 1) Amino modification of black phosphorus nanosheets: Disperse 10 g of black phosphorus nanosheets into 100 mL of isopropanol (HPLC grade), then add 10 mL of 3-amino-4-hydroxybenzenesulfonic acid (APS), and reflux at 180 °C for 8 hours, then centrifuged, and the solid part was washed with absolute ethanol, and redispersed in 150mL of absolute ethanol to obtain the amino-modified black phosphorus nanosheet dispersion.

[0054] 2) Preparation of ultra-small platinum-palladium alloy nanoparticles on the surface of black phosphorus nanosheets. Take 10mL of the amino-modified black phosphorus nanosheet dispersion prepared in step 1), add it to the mixed solution of 1mL of absolute ethanol, 1mL of deionized water and 10mL of ammonia solution (25wt%), add 10g of dodecane Sodium benzene sulfonate (SDBS), stir well. Make resorcinol into a 22g / L solution...

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Abstract

The invention discloses a black phosphorus/precious metal composite material as well as a preparation method and an application thereof. The black phosphorus/precious metal composite material is a product prepared from precious metal nano-particles and/or precious metal alloy nano-particles through coordinate bond with black phosphorus, black phosphorus is modified with precious metal, so that black phosphorus cannot be oxidized in water and air, and stability of structure and performance of the black phosphorus material is enhanced; compared with the black phosphorus material and the precious metal/precious metal alloy nano-particles, the black phosphorus/precious metal composite material has excellent physicochemical characteristics, and catalytic performance of the black phosphorus/precious metal composite material is better than that of black phosphorus, therefore, the black phosphorus/precious metal composite material can be applied to a wider catalysis field and can be taken as an efficient photocatalyst, an electrocatalyst and an organic catalyst to be applied to the fields of photocatalysis, electrochemistry, organic catalytic reaction and the like.

Description

technical field [0001] The invention relates to the technical field of black phosphorus materials, in particular to a black phosphorus / noble metal composite material, its preparation method and application. Background technique [0002] Two-dimensional black phosphorus (referred to as black phosphorus) is a new type of two-dimensional semiconductor material that has attracted extensive attention. As a member of two-dimensional planar materials, black phosphorus has a two-dimensional layered structure similar to graphene. The phosphorus atoms in the same layer are connected by covalent bonds, and the layers are stacked together by van der Waals force. Through nearly three years of research, black phosphorus has shown many unique properties. First of all, compared with the zero band gap of graphene and the indirect band gap (above the second layer) of transition metal sulfides, black phosphorus is a direct band gap semiconductor, that is, the bottom of the conduction band and...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J37/03B01J37/16
CPCB01J27/1856B01J35/0013B01J35/004B01J35/006B01J35/0093B01J37/038B01J37/16
Inventor 喻学锋王欣白力诚
Owner SHENZHEN INST OF ADVANCED TECH
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