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A kind of nanometer metal/red phosphorus composite material and preparation method thereof

A nano-metal and composite material technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of simple preparation method, uniform size and good contact

Active Publication Date: 2019-08-16
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nano-metal (Au, Ag, Cu) particles have a strong localized surface plasmon resonance effect (Localized Surface Plasmon Resonance, LSPR), the free electrons on the surface and the incident light can resonate, which can make the light absorption of objects around the metal and photoexcitation have been effectively enhanced, but the research on the combination of red phosphorus and nano-metal particles is still blank.

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  • A kind of nanometer metal/red phosphorus composite material and preparation method thereof
  • A kind of nanometer metal/red phosphorus composite material and preparation method thereof
  • A kind of nanometer metal/red phosphorus composite material and preparation method thereof

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preparation example Construction

[0027] The preparation method of the nano metal / red phosphorus composite material of the present invention includes the following steps:

[0028] Dissolve the nano metal soluble salt in water to obtain the nano metal precursor aqueous solution, mix the nano metal precursor aqueous solution with the nano red phosphorous dispersion liquid, stir uniformly, carry out the in-situ reduction compound reaction, and then the reactant is filtered, washed with water, and dried Obtain nano-metal / red phosphorus composite material.

[0029] Specifically, the nano-metal soluble salt is copper sulfate, copper nitrate, copper chloride, silver nitrate or chloroauric acid.

[0030] The concentration of the nano-metal precursor aqueous solution in the mixed solution is 0.1-2.0 mmol / L.

[0031] The reaction temperature of the nano-metal precursor aqueous solution and the nano-red phosphorus dispersion is 30-150°C, and the reaction time is 0.5-2h.

[0032] The dripping process of the nano red phosphorous di...

Embodiment 1

[0041] At room temperature, the commercially available red phosphorus was ground in water, sieved with a 120-mesh screen and dried to obtain micron red phosphorus particles. Weigh 3g and disperse in a reaction consisting of 55mL water, 5mL ethylene glycol, and 0.12g NaOH. In the liquid, stir for 30min, transfer to a 100mL hydrothermal synthesis reaction tank with polytetrafluoroethylene lining, place it in a blast drying box after sealing, heat up at 5℃ / min to 200℃ for 24h, and cool naturally after the reaction is complete To room temperature, the product was repeatedly washed with distilled water and absolute ethanol and centrifuged (12000rmp / min). After the product was dried at 80℃, it was annealed at 380℃ for 1h under the protection of argon. Finally, 1.0g product was dispersed in 500mL In water, 300W, 20KHz ultrasonic for 10h was used to obtain nano red phosphorus dispersion (reaction liquid A).

Embodiment 2

[0043] Weigh 0.021g CuSO 4 ·5H 2 O was dissolved in 40mL of water (reaction solution B); then take 40mL of reaction solution A in Example 1, add it dropwise to reaction solution B within 30 minutes, continue stirring for 30 minutes, and then transfer to the hydrothermal synthesis reactor (lined 100mL polytetrafluoroethylene), sealed and placed in a blast drying box, heated at 5°C / min to 150°C and kept for 2h. After the reaction is completed, it is naturally cooled to room temperature. The product is filtered with a 200nm filter membrane and rinsed repeatedly with distilled water , The solid product is dried at 60 ℃ to obtain nano-copper / red phosphorus composite material. Such as figure 1 In the white circle part is nano metal copper, RP represents red phosphorus, figure 1 It can be seen that the nano-copper particles are uniformly distributed on the surface of red phosphorus, with a particle size of about 4nm; Figure 5 It can be seen that under visible light, the photocurrent o...

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Abstract

The invention discloses a preparation method of nanometer metal / red phosphorus photoelectric composite material. Firstly, the nano-red phosphorus is placed in water and ultrasonically obtained to obtain the nano-red phosphorus dispersion, and the metal precursor aqueous solution is prepared; then the nano-red phosphorus dispersion and the metal precursor aqueous solution are added dropwise, and the in-situ reduction compound is carried out after stirring evenly, and finally the The product is filtered, washed, and dried to obtain nanometal / red phosphorus composite material. The present invention does not add reducing agent, protective agent, and dispersant when preparing nano-metal particles, and the preparation method is green and simple; the product of the present invention has good stability, large specific surface area, uniform distribution of metal particles, and uniform size, and the compound has good photoelectricity Responsiveness.

Description

Technical field [0001] The invention belongs to the technical field of photoelectric material preparation, and specifically relates to a nano metal / red phosphorous composite material and a preparation method thereof. Background technique [0002] Red phosphorus is mainly used to produce matches, organophosphorus pesticides, incendiary bombs, flame retardants, and can also be used to prepare semiconductor compounds and as a dopant for semiconductor materials. In recent years, red phosphorus as a high-capacity anode material (theoretical capacity can reach 2596mAh / g) has attracted much attention in the field of lithium-ion batteries. In addition, because red phosphorus has good visible light response characteristics (Eg≈1.8eV), it can realize photocatalytic decomposition of water to produce hydrogen and oxygen, and it has potential application prospects in the field of photocatalysis. However, the conductivity of red phosphorus is low, and photo-generated electrons and holes are e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
Inventor 刘恩周戚露露樊君胡晓云樊安苗慧张德恺
Owner NORTHWEST UNIV
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