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Metal organic hybrid lattice material and application thereof in irradiation source detection

A metal organic, radiation source technology, applied in the field of radiation detection materials, can solve the problems of accurate quantitative analysis to be improved, complex testing equipment and data processing, low sensitivity, etc.

Active Publication Date: 2020-10-27
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, a variety of commercial materials have been developed for the measurement of ionizing radiation. Irradiation photoluminescent materials have been widely used in the detection of X, γ and other rays as luminescent signal output type radiation detection materials, but such traditional irradiation photoluminescent materials (Glass, ceramics, high molecular polymers, inorganic salt crystals, etc.) still have problems such as low sensitivity, narrow detection limit range, poor linear relationship, complex testing equipment and data processing, and the stability and repeatability of some materials. Utilization can also be improved
Due to the poor ray blocking ability of traditional radiation photoluminescence detection materials, resulting in poor radiation stability and low sensitivity, thus limiting the application prospects of materials, the quantification of radiation dose depends on optical instrument and equipment testing Analysis is also a low-efficiency and economical radiation detection method
[0004] The commercialized radiation color indicator labels usually use polyvinyl butyral (PVB) and alcohol-based dyes, but this material can only be used as a one-time use of radiation detection test paper
At the same time, during the detection process, the inspector visually recognizes the color change of the indicating label paper after irradiation, and compares it with the chromaticity of the standard indicating label card, and conducts qualitative or semi-quantitative radiation detection and analysis, which can accurately quantify the radiation dose. Analysis still needs to be improved

Method used

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  • Metal organic hybrid lattice material and application thereof in irradiation source detection
  • Metal organic hybrid lattice material and application thereof in irradiation source detection
  • Metal organic hybrid lattice material and application thereof in irradiation source detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Example 1 Material synthesis and structural stability test before and after irradiation

[0074] In this example, the material was synthesized and the crystal structure stability under different irradiation conditions was tested to verify that the material in the present invention can be practically applied under various high-dose irradiation conditions without causing radiation damage to the material.

[0075] 0.05mmol Th(NO 3 ) 4 ·6H 2 O solid, 0.05mmol 2,2':6',2"-terpyridine-4'-carboxylic acid solid and 1.6-2.5wt% hydrochloric acid, 1mL H 2 0. 1mL DMF was placed in a 5ml glass vial, sealed, heated to 100°C, and heated for 1-2 days. After the reaction, a transparent bulk crystal product was obtained. The crystal product was taken out from the vial and washed with ethanol solution. Dry at room temperature to obtain a metal-organic hybrid lattice material, hereinafter referred to as crystal material. The reaction scheme is as follows:

[0076]

[0077] figure ...

Embodiment 2

[0080] Example 2 Thermal Stability Analysis of Crystalline Materials

[0081] In this embodiment, the synthesized crystal material is subjected to a thermal stability test to verify the heat resistance of the material of the present invention, so that the fluorescent signal value can be restored by heating at a suitable temperature, so that the material can be recycled.

[0082] Characterize the crystal that embodiment 1 generates with thermogravimetric analyzer, as image 3As shown, it is proved that the skeleton of the crystalline material does not collapse before 150°C, ensuring the stability of the structure, and only loses the mass of water molecules in the crystalline material structure (3.55% mass loss) before 150°C. The mass loss before 300°C is 9.70%, which is the mass of free water and coordinated water molecules and formic acid in the structure. Therefore, it is possible to find a suitable temperature before 150°C to restore the fluorescence signal value of the cry...

Embodiment 3

[0083] Fluorescence stability after embodiment 3 irradiation

[0084] In this embodiment, the crystal material is irradiated under UV to verify that the fluorescent signal of the material of the present invention after irradiation can be stable for a long time at room temperature. Since the quantitative detection standard of ultraviolet light is 4.21mJ, when it exceeds 4.21mJ, the fluorescence will be saturated and the fluorescence signal will not change. Therefore, the energy exceeding the quantitative detection standard was selected for stability testing.

[0085] The crystal material prepared in Example 1 was exposed to light for more than 2 hours under 254nm UV (5.26mJ), and then stored in a dark room, and its fluorescence stability in different time periods within two days was tested.

[0086] The fluorescence signal of the crystal was characterized by a solid-state spectrometer ( Figure 4 ), Figure 4 a and b are the test results of the fluorescence spectrum signal i...

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Abstract

The invention relates to a metal organic hybrid lattice material and application thereof in irradiation source detection. Water-soluble thorium salt and 2, 2': 6', 2''-terpyridine-4'-formic acid are subjected to a solvothermal reaction in a mixed solvent of water and an organic solvent, and the metal organic hybrid lattice material is obtained. The crystal material generates irradiation discoloration and irradiation photoinduced fluorescence change under the irradiation conditions of ultraviolet rays, X rays, gamma rays, beta rays and the like. The material can be used for qualitative and quantitative detection and calibration after large-dose ray irradiation; compared with the traditional irradiation discoloration indication label, the visual qualitative and quantitative detection is realized, and meanwhile, the material is strong the irradiation stability, high in repeated utilization rate, wide in detection limit range and good in linear relationship, and the problem that the traditional material depends on professional optical equipment to quantify the irradiation dose can be solved.

Description

technical field [0001] The invention relates to the field of radiation detection materials, in particular to a metal-organic hybrid lattice material and its application in radiation source detection. Background technique [0002] With the rapid development of nuclear energy and nuclear technology in China, radioisotope and irradiation technology has been widely used in the fields of industry, agriculture, medical treatment, science, geological survey and other fields in my country, so it also faces the potential risk of ionizing radiation pollution. The development of efficient, sensitive and fast ionizing radiation detection technology is the key to the prevention and control of radiation pollution, and it is also an important prerequisite for the protection of human health and the sustainable development of nuclear energy and nuclear technology. As a sharp tool for the prevention and control of radiation pollution, nuclear detection technology can be used for radiation saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/10G01T1/20
CPCG01T1/10G01T1/2012Y02E30/30G01T1/06G01T1/08
Inventor 王建强陆黄杰林健
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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