Porous three-dimensional phosphaalkene as well as preparation method and application of porous three-dimensional phosphaalkene

A technology of three-dimensional phosphorene and black phosphorene, which is applied in the field of inorganic nanomaterials, can solve the problems of hindering application and reducing the contact area of ​​electrolyte, and achieve the effect of increasing wettability, high utilization rate and stable three-dimensional structure

Active Publication Date: 2019-01-11
HUBEI MOPHOS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the two-dimensional structure of phosphorene is easy to recombine, which reduces the contact area with the electrolyte, which seriously hinders its application in electrocatalysis.

Method used

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  • Porous three-dimensional phosphaalkene as well as preparation method and application of porous three-dimensional phosphaalkene
  • Porous three-dimensional phosphaalkene as well as preparation method and application of porous three-dimensional phosphaalkene
  • Porous three-dimensional phosphaalkene as well as preparation method and application of porous three-dimensional phosphaalkene

Examples

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Effect test

Embodiment 1

[0049] A method for preparing porous three-dimensional black phosphorene, comprising the steps of:

[0050] (1) Use 1*0.5*0.05cm black phosphorus crystal as cathode, 2*2*0.05cm platinum sheet as auxiliary electrode, N,N-dimethylformamide as intercalation agent, tetrabutyl Ammonium bromide is used as an auxiliary intercalation agent, the concentration of tetrabutylammonium bromide is 0.01M, and an H-type electrolytic cell is assembled;

[0051] (2) Using a direct current power supply to expand the black phosphorus crystal for 1min under the condition of a voltage of 10V, after the expansion is completed, the black phosphorus with a rough surface and doubled volume is obtained;

[0052] (3) Use a 400-mesh filter screen to filter the expanded black phosphorus, then use N,N-dimethylformamide, ethanol, acetone, and cyclohexane to wash the expanded black phosphorus for 3 times, and then wash the black phosphorus Phosphorus was soaked in cyclohexane for 30 minutes, then placed in li...

Embodiment 2

[0058] A method for preparing porous three-dimensional black phosphorene, comprising the steps of:

[0059] (1) Use 2*1*0.05cm black phosphorus crystal as cathode, 2*2*0.05cm carbon cloth as auxiliary electrode, N-methylpyrrolidone as intercalation agent, tetrapentyl ammonium iodide as Auxiliary intercalation agent, the concentration of tetrapentyl ammonium iodide is 0.025M, assembled into an H-type electrolytic cell;

[0060] (2) Adopting DC power supply to carry out expansion treatment to black phosphorus crystal under the condition of voltage of 10V for 3min, obtain rough surface and black phosphorus with doubled volume after the expansion is completed;

[0061] (3) Adopt 400 mesh filter screens to filter the expanded black phosphorus, then use N-methylpyrrolidone, ethanol, acetone, carbon tetrachloride to wash the expanded black phosphorus 3 times respectively, then place the washed black phosphorus in Soak in carbon tetrachloride for 30 minutes, then place in liquid nitr...

Embodiment 3

[0065] A method for preparing porous three-dimensional black phosphorene, comprising the steps of:

[0066] (1) Use 2.5*1.5*0.05cm black phosphorus crystal as cathode, 3*3*0.05cm titanium mesh as auxiliary electrode, dimethyl sulfoxide as intercalation agent, and tetrahexylammonium bromide as auxiliary The intercalation agent, the concentration of tetrahexyl ammonium bromide is 0.05M, assembled into an H-type electrolytic cell;

[0067] (2) Adopting DC power supply to expand the black phosphorus crystal for 5min under the condition of voltage of 20V, after the expansion is completed, obtain the black phosphorus with rough surface and multiplied volume;

[0068] (3) Adopt 400 mesh filter screens to filter the expanded black phosphorus, then use dimethyl sulfoxide, ethanol, acetone, cyclohexane to wash the expanded black phosphorus 3 times respectively, then place the washed black phosphorus in the ring Soak in hexane for 30 minutes, then place in liquid nitrogen and freeze at ...

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Abstract

The invention discloses porous three-dimensional phosphaalkene as well as a preparation method and an application of the porous three-dimensional phosphaalkene. The porous three-dimensional phosphaalkene has a stable three-dimensional structure formed by self-crosslinking assembly of black phosphaalkene and has the porosity of 50%-98% and the specific surface area of 200-2000 m<2>/g. A relativelystrong electric field is applied to a two-electrode or multi-electrode system by using an electrochemical method, an intercalator and an auxiliary intercalator directionally move towards a black phosphorus crystal and enter an interlayer to destroy an interlayer force of the black phosphorus crystal, and black phosphorus interlayers are kept crosslinked, but an interlayer distance is increased, sothat the black phosphorus crystal expands and the porosity is enlarged, then, the expanded black phosphorus is treated by freeze-drying, and thus, the porous three-dimensional phosphaalkene is obtained. The porous three-dimensional phosphaalkene has excellent physical and chemical properties instead of increasing the wettability of an electrolyte to an electrode material, is also beneficial to the adsorption and diffusion of reactants and metabolites in a reaction process and can be applied to the field of hydrogen production under electrochemical catalysis.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and specifically relates to a porous three-dimensional phosphorene and a preparation method thereof, as well as the application of the porous three-dimensional phosphorene as a catalyst for electrolyzing water to produce hydrogen. Background technique [0002] With the development of the economy, the increasing consumption of fossil energy is facing the problem of depletion. Environmental pollution and temperature changes caused by fossil energy consumption have become urgent problems to be solved, and it is imminent to seek renewable green energy. Solar energy and wind energy are representative renewable energy sources, and they are applied on a large scale in many countries and regions. However, when these clean energy sources are used as fossil energy sources on a global scale, there are two problems. Solar and wind power generation relies on uncontrollable sun or wind,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/02
CPCC01B25/02
Inventor 喻学锋刘丹妮王佳宏黄浩
Owner HUBEI MOPHOS TECH CO LTD
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