Rare-earth-phosphonic acid ultrathin two-dimensional material as well as preparation method and application thereof

A two-dimensional material, rare earth technology, applied in the field of rare earth-phosphonic acid ultra-thin two-dimensional material and its preparation, to achieve the effect of easy-to-obtain material, clear texture, and easy preparation

Inactive Publication Date: 2019-02-26
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although rare earth luminescent materials have been widely used in various fields such as display imaging, new light sources, and X-ray intensifying screens, there are few reports on the research and development of functional rare earth materials in the field of criminal investigation, especially in the field of fingerprint color imaging.

Method used

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  • Rare-earth-phosphonic acid ultrathin two-dimensional material as well as preparation method and application thereof
  • Rare-earth-phosphonic acid ultrathin two-dimensional material as well as preparation method and application thereof
  • Rare-earth-phosphonic acid ultrathin two-dimensional material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 89.83 mg of europium nitrate hexahydrate and dissolve it in 2 mL of distilled water to obtain a homogeneous aqueous solution of europium nitrate. 3 h 2 solution, and then the mixed solution was stirred for 10 minutes at room temperature. The uniformly stirred mixed solution was transferred to a reaction kettle, heated at 140°C for 24 hours, cooled, centrifuged, washed, centrifuged, and dried to obtain the rare earth-phosphonic acid two-dimensional material.

Embodiment 2

[0031] Weigh 89.83 mg of terbium nitrate hexahydrate, dissolve it in 2.5 mL of distilled water to obtain a homogeneous aqueous solution, and add this solution to 2 mL of R-PO dissolved in 1.5 times the molar equivalent 3 h 2 solution, and stirred at room temperature for 20 minutes. The mixed solution was transferred to a reaction kettle, heated in water at 100 degrees Celsius for 72 hours, cooled, centrifuged, washed, centrifuged again, and dried to obtain the rare earth-phosphonic acid two-dimensional material.

Embodiment 3

[0033]Weigh 44.61 mg of europium nitrate hexahydrate and 45.22 mg of terbium nitrate hexahydrate, dissolve them in 2 mL of distilled water to obtain a homogeneous aqueous solution, and add the solution to 2 mL of R-PO dissolved in 1.5 times molar equivalent 3 h 2 solution, and then stirred at room temperature for 10 minutes. The mixed solution was transferred to a reaction kettle, heated at 180 degrees Celsius for 8 hours, cooled, centrifuged, washed, centrifuged again, and dried to obtain the rare earth-phosphonic acid two-dimensional material.

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Abstract

The invention belongs to the technical field of functional materials, and particularly relates to a rare-earth phosphonic acid ultrathin two-dimensional material as well as a preparation method and application thereof. The molecular formula of the rare-earth phosphonic acid two-dimensional material disclosed by the invention is [M(R-PO3)(R-PO3H)H2O], wherein M is any one or a combination of two ofrare earth Eu and Tb trivalent cations, R-PO3 is a completely deprotonated form of an organic phosphonic acid group of R-PO3H2, R-PO3H is a partially deprotonated form of the organic phosphonic acidgroup of the R-PO3H2, and R is m-carboxyphenyl or m-isothiocyano phenyl; and the two-dimensional material is obtained by carrying out one-step hydrothermal reaction on a rare-earth salt and the organic phosphonic acid. The rare-earth phosphonic acid ultrathin two-dimensional material aiming at fingerprint characteristic chemical substances can ensure accurate extraction of a fingerprint and the clear line of the fingerprint by specific reaction between the material and the mark of the fingerprint. The fingerprint extraction material provided by the invention is simple in preparation method andeasily available in raw materials, the fingerprint extraction operation is simple, the fingerprint color development is clear, and the fingerprint extraction material has an application prospect in criminal investigation.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a rare earth-phosphonic acid ultrathin two-dimensional material and its preparation method and application. Background technique [0002] Fingerprint marks are mainly due to the presence of a large number of sweat glands and sebaceous glands in the fingers. Therefore, as long as the fingers touch the surface of the object, fingerprint marks will be left automatically like a seal. Due to the particularity of the "human identity card" of fingerprints, the extraction and color development of fingerprints are important links in criminal investigation. Traditional fingerprint observation methods include: 1) Breathing observation method: observe with breath on the surface of a smooth object; (2) naked eye observation method: observe with the help of a certain light and angle; (3) magnifying glass observation method: use a magnifying glass to observe under a cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
CPCC09K11/06C09K2211/182
Inventor 凌云何鸿洁周兆晖陈珍霞贾瑜刘小锋杨永泰周亚明
Owner FUDAN UNIV
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