Red phosphorus pre-treatment method for preparing black phosphorus

A pretreatment, red phosphorus technology, applied in the preparation of phosphorus, chemical instruments and methods, phosphorus compounds, etc., can solve the problems of low selectivity, residual impurities, affecting the comprehensive performance of black phosphorus, etc., to achieve improved purity, particle size and shape. The effect of uniform appearance and high crystallinity
CN106744754AInactive Publication Date: 2017-05-31SHENZHEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN UNIV
Publication Date
2017-05-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a red phosphorus pre-treatment method for preparing black phosphorus. The red phosphorus pre-treatment method comprises the following steps: putting red phosphorus into a heating furnace; heating to 150 DEG C to 300 DEG C under a protective atmosphere or vacuum condition, and keeping for 1h to 4h; then naturally cooling to room temperature; carrying out manual grinding or ball milling on the red phosphorus subjected to the heating treatment to obtain pre-treated red phosphorus powder. The red phosphorus pre-treatment method provided by the invention has a simple process, and the treated red phosphorus powder has high purity and uniform granularity and shape; when the red phosphorus powder is used as a raw material for synthesizing the black phosphorus, the purity and conversion efficiency of the black phosphorus can be effectively improved, and high-quality and high-crystallization-degree black phosphorus single crystals or poly-crystals are obtained.
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Description

technical field

[0001] The invention relates to the technical field of red phosphorus processing, in particular to a red phosphorus pretreatment method for preparing black phosphorus and red phosphorus powder processed by the method. Background technique

[0002] There are three main allotropes of phosphorus, white phosphorus, red phosphorus and black phosphorus, among which black phosphorus has relatively high thermodynamic stability, adjustable direct band gap, near-infrared light response characteristics and biodegradability. It has received more and more attention in fields such as optoelectronic devices. The traditional method of preparing black phosphorus is to convert white phosphorus into black phosphorus crystals under high temperature and ultra-high pressure conditions. The temperature used exceeds 1000°C and the pressure is as high as GPa. Therefore, this method has high technical threshold and great safety hazards. , high cost and other obvious shortcomings, the...

Claims

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