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Preparation method of acid type niobium phosphate oxygen monoatomic layer sheet

A technology of niobium monophosphate and niobium phosphate precursor, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., to achieve the effects of high peeling yield, low cost and high efficiency

Active Publication Date: 2019-07-12
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be pointed out that most of the niobium oxyphosphate materials reported in the existing literature are three-dimensional mesoporous systems, and there are no publications focusing on the synthesis and control of layered phase acid niobium oxyphosphate and the exfoliation of single-atom thin layer structures.

Method used

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  • Preparation method of acid type niobium phosphate oxygen monoatomic layer sheet
  • Preparation method of acid type niobium phosphate oxygen monoatomic layer sheet
  • Preparation method of acid type niobium phosphate oxygen monoatomic layer sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.5g of commercial-grade niobium oxalate powder, transfer it to a 250mL three-necked flask that has been pre-cleaned and dried, and add 80mL of deionized water and 5mL of commercial-grade phosphoric acid in turn; The three-necked bottle was transferred and fixed on the oil bath reaction system equipped with a condensing reflux device, and the reaction solution was continuously stirred until a transparent and clear solution was formed, then the reaction temperature was adjusted to 120° C. for 15 hours of reaction. After the reaction, when the system was cooled to room temperature, the white precipitated product at the bottom of the bottle was transferred to a Buchner funnel covered with two layers of filter paper and completely sealed on the suction filter bottle, and the white product was extracted five times with deionized water. Filtration and washing operations, and the fully washed product was transferred to a blast drying oven and dried at 60°C for 8 hours to ...

Embodiment 2

[0030] Weigh 0.5g of commercial-grade niobium oxalate powder, transfer it to a 250mL three-necked flask that has been pre-cleaned and dried, and add 80mL of deionized water and 5mL of commercial-grade phosphoric acid in turn; The three-necked bottle was transferred and fixed on the oil bath reaction system equipped with a condensing reflux device, and the reaction solution was continuously stirred until a transparent and clear solution was formed, then the reaction temperature was adjusted to 120° C. for 15 hours of reaction. After the reaction, when the system was cooled to room temperature, the white precipitated product at the bottom of the bottle was transferred to a Buchner funnel covered with two layers of filter paper and completely sealed on the suction filter bottle, and the white product was extracted five times with deionized water. Filtration and washing operations, and the fully washed product was transferred to a blast drying oven and dried at 60°C for 8 hours to ...

Embodiment 3

[0032]Weigh 0.5g of commercial-grade niobium oxalate powder, transfer it to a 250mL three-necked flask that has been pre-cleaned and dried, and add 80mL of deionized water and 5mL of commercial-grade phosphoric acid in turn; The three-necked bottle was transferred and fixed on the oil bath reaction system equipped with a condensing reflux device, and the reaction solution was continuously stirred until a transparent and clear solution was formed, then the reaction temperature was adjusted to 120° C. for 15 hours of reaction. After the reaction, when the system was cooled to room temperature, the white precipitated product at the bottom of the bottle was transferred to a Buchner funnel covered with two layers of filter paper and completely sealed on the suction filter bottle, and the white product was extracted five times with deionized water. Filtration and washing operations, and the fully washed product was transferred to a blast drying oven and dried at 60°C for 8 hours to o...

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Abstract

The invention belongs to the technical field of chemical material synthesis, in particular to a preparation method of an acid type niobium phosphate oxygen monoatomic layer sheet. The method comprisesthe following steps: preparing acid type niobium phosphate oxygen precursor blocks with a chemical liquid phase synthesis method, and washing and drying the blocks to obtain powder; preparing the acid type niobium phosphate oxygen monoatomic layer sheet with an ultrasonic solvent assisted stripping method. The acid type niobium phosphate oxygen monoatomic layer sheet is uniform and stable ultrathin nanosheet colloid. The prepared acid type niobium phosphate oxygen monoatomic layer sheet has transverse dimension of tens of nanometers to hundreds of nanometers and thickness of about 1 nm, and can realize 10 mg / mL high-concentration stable dispersion in a water phase or an ethanol solvent. The synthesis and stripping yield realized with the method can be stably kept at 98% or higher. The method is simple, convenient, safe and efficient, and has potential value for application research of layered acid type phosphorus niobium oxygen in the fields of electrochemical energy storage, photoelectric conversion devices, chemical catalysis, electrocatalysis and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical material synthesis, and in particular relates to a preparation method of acid niobium oxygen monoatomic layer flakes. Background technique [0002] Since British scientists stripped graphene with a thickness of one carbon atom from pyrolytic graphite in 2004, this ultra-thin two-dimensional material has the structural characteristics of single or multiple carbon atomic layers and extremely high electron mobility. High efficiency, good mechanical flexibility, chemical stability and optical transparency, as well as excellent electrical and thermal conductivity, have begun to show broad application prospects in lithium-ion batteries, supercapacitors, solar cells, and thermally conductive films. Taking graphene as an opportunity and breakthrough, a series of two-dimensional layered materials such as hexagonal boron nitride (h-BN), transition metal sulfides (TMDs), layered transition metal oxides (Oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/37
CPCC01B25/372C01P2002/72C01P2004/04
Inventor 胡林峰武泽懿江乐田文超
Owner FUDAN UNIV
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