Preparation method of copper-based metal halide composite material paper X-ray scintillator

Abstract

The invention relates to the technical field of luminescent materials, in particular to a preparation method of a copper-based metal halide composite material paper X-ray scintillator, which adopts a simplest and direct solution synthesis method, is simple and convenient to operate, does not involve complex processes and high-energy equipment, has strong repeatability and can be quickly produced on a large scale. The defects of high temperature, high pressure and the like of traditional fluorescent powder preparation are avoided; the flexible scintillator film can be rapidly obtained according to the size of a paper base through a prime coat method; the scintillator is rich in raw material source, low in production cost, high in commercial use value and capable of being applied to the fields of X-ray flat panel detectors, CT detectors and the like, and in this way, the technical problem that in the prior art, a scintillator is limited in the aspect of X-ray imaging due to low spatial resolution and material toxicity of the scintillator in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of luminescent materials technology, and in particular to a method for preparing a copper-based metal halide composite paper X-ray scintillator. Background Technology

[0002] X-ray scintillators are a class of materials that can convert high-energy X-rays into low-energy visible light (ultraviolet, visible, or infrared). Although significant progress has been made in the research of X-ray scintillators, their development remains an urgent need due to their inherent dangers and the pressing need for their applications in medical and security fields.

[0003] Currently, the spatial resolution of commercially available inorganic scintillator CsI:Tl is 10 lp / mm. Although it has a high light yield (54,000 photon / MeV), its low spatial resolution and the toxicity of the material itself limit its use in X-ray imaging.

[0004] Therefore, there is an urgent need to develop scintillator materials with lower detection limits, non-toxicity or low toxicity, and higher resolution and light yield. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing a copper-based metal halide composite paper X-ray scintillator, which solves the technical problems of low spatial resolution and material toxicity in the prior art that limit its application in X-ray imaging.

[0006] To achieve the above objectives, the present invention provides a method for preparing a copper-based metal halide composite paper X-ray scintillator, comprising the following:

[0007] According to the chemical formula Ma·CubIc, the raw materials of each element are weighed in proportion, and then directly added to the solvents ethanol and acetonitrile for stirring and heating (50-100℃) to react and obtain a transparent solution.

[0008] Place the prepared transparent solution in an open, flat-bottomed container;

[0009] Place the substrate material into a petri dish containing the solution, ensuring the substrate material is completely wetted;

[0010] Then, the soaked paper is removed, and the substrate material is suspended and supported by a support. The substrate material is laid flat and left to wait for the solvent to evaporate. The phosphor is then uniformly precipitated and adhered to the inner and outer surfaces of the substrate material.

[0011] After the substrate material has completely dried, use transparent tape to seal the surface of the appropriate scintillator film to isolate it from the air.

[0012] In the chemical formula Ma·CubIc, M is C21 H 22 PI (isopropyltriphenylphosphine iodide);

[0013] a, b, and c are molar coefficients, and their ranges are 1 ≤ a ≤ 3, 1 ≤ b ≤ 2, and 2 ≤ c ≤ 4.

[0014] The open-topped, flat-bottomed container used was a 20*20cm petri dish.

[0015] The base material used is "paper", including weighing paper and filter paper.

[0016] In the step of "placing the substrate material into a petri dish containing the solution and ensuring that the substrate material is completely immersed", after the substrate material is completely immersed, it needs to stand for 6-12 minutes.

[0017] This invention discloses a method for preparing a copper-based metal halide composite paper X-ray scintillator. The method employs a simple and direct solution synthesis approach, which is easy to operate, avoids complex processes and high-energy equipment, has high repeatability, and allows for rapid large-scale production, avoiding the drawbacks of traditional phosphor preparation methods such as high temperature and high pressure. A flexible scintillator film can be quickly obtained according to the size of the paper substrate using a base coating method. The raw materials used in this invention are abundant, the production cost is low, and the commercial application value is high, with potential applications in X-ray flat panel detectors and CT detectors. This method solves the technical problems of low spatial resolution and material toxicity in existing scintillators, which limit their use in X-ray imaging. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is the XRD pattern of the β-(ITPP)2Cu2I4 phosphor of the present invention.

[0020] Figure 2 These are the emission spectra of β-(ITPP)2Cu2I4 excited at 360 nm and the excitation spectra monitored at 525 nm, respectively, according to the present invention.

[0021] Figure 3 This is a schematic diagram of the coordinates of the β-(ITPP)2Cu2I4 fluorescent pink color of the present invention.

[0022] Figure 4 This is an X-ray scintillation emission spectrum of the β-(ITPP)2Cu2I4 composite material of the present invention, and a schematic diagram comparing it with a commercial LuAG:Ce scintillator.

[0023] Figure 5This is a schematic diagram of the lowest detection limit of X-ray dose detection based on the β-(ITPP)2Cu2I4 composite material of the present invention.

[0024] Figure 6 This is a schematic diagram of the preparation process of the paper-based scintillator film based on β-(ITPP)2Cu2I4 composite material according to the present invention.

[0025] Figure 7 This is a schematic diagram of the β-(ITPP)2Cu2I4 composite paper-based scintillator film of the present invention.

[0026] Figure 8 This is a schematic diagram of the flexible X-ray scintillator film imaging based on the β-(ITPP)2Cu2I4 composite material of the present invention.

[0027] Figure 9 The present invention relates to a flexible X-ray scintillator film based on β-(ITPP)2Cu2I4 composite material: the relationship between modulation transfer function and spatial resolution is calculated from the edge plot (built-in).

[0028] Figure 10 This is a schematic diagram of the resolution test card of the present invention and its resolution under X-ray imaging. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0030] Please see Figures 1-10 , Figure 1 This is the XRD pattern of the β-(ITPP)2Cu2I4 phosphor of the present invention. Figure 2 These are the emission spectra of β-(ITPP)2Cu2I4 excited at 360 nm and the excitation spectra monitored at 525 nm, respectively, according to the present invention. Figure 3 This is a schematic diagram of the coordinates of the β-(ITPP)2Cu2I4 fluorescent pink color of the present invention. Figure 4 This is an X-ray scintillation emission spectrum of the β-(ITPP)2Cu2I4 composite material of the present invention, and a schematic diagram comparing it with a commercial LuAG:Ce scintillator. Figure 5 This is a schematic diagram of the lowest detection limit of X-ray dose detection based on the β-(ITPP)2Cu2I4 composite material of the present invention. Figure 6 This is a schematic diagram of the preparation process of the paper-based scintillator film based on β-(ITPP)2Cu2I4 composite material according to the present invention. Figure 7 This is a schematic diagram of the β-(ITPP)2Cu2I4 composite paper-based scintillator film of the present invention. Figure 8This is a schematic diagram of the flexible X-ray scintillator film imaging based on the β-(ITPP)2Cu2I4 composite material of the present invention. Figure 9 The present invention relates to a flexible X-ray scintillator film based on β-(ITPP)2Cu2I4 composite material: the relationship between modulation transfer function and spatial resolution is calculated from the edge plot (built-in). Figure 10 This is a schematic diagram of the resolution test card of the present invention and its resolution under X-ray imaging.

[0031] This invention provides a method for preparing a copper-based metal halide composite paper X-ray scintillator, comprising the following:

[0032] S1. Weigh the raw materials of each element according to the chemical formula Ma·CubIc in proportion. After weighing, directly add them to the solvents ethanol and acetonitrile and stir and heat (50-100℃) to react and obtain a transparent solution.

[0033] In this specific embodiment, in the chemical formula Ma·CubIc, M represents C. 21 H 22 PI (isopropyltriphenylphosphine iodide);

[0034] a, b, and c are molar coefficients, and their ranges are 1 ≤ a ≤ 3, 1 ≤ b ≤ 2, and 2 ≤ c ≤ 4.

[0035] S2. Place the prepared transparent solution in an open, flat-bottomed container;

[0036] In this specific embodiment, the open-topped, flat-bottomed container used is a 20*20cm petri dish.

[0037] S3. Place the substrate material into a petri dish containing the solution, ensuring the substrate material is completely wetted.

[0038] In this specific embodiment, the substrate material used is "paper", including weighing paper and filter paper.

[0039] In the step "Place the substrate material into a petri dish containing the solution and allow the substrate material to be completely wetted", after the substrate material is completely wetted, it needs to stand for 6-12 minutes.

[0040] S4. Then, take out the soaked paper, use a support to suspend the substrate material, lay the substrate material flat and wait for the solvent to evaporate, and the phosphor will then be uniformly precipitated and adhered to the inner and outer surfaces of the substrate material.

[0041] S5. After the substrate material has completely dried, use transparent tape to seal the surface of the appropriate scintillator film to isolate it from the air. Specific Implementation

[0042] The preparation method of copper-based metal halide composite paper X-ray scintillator includes the following steps;

[0043] Step 1: Weigh the corresponding elemental compounds and solvents according to their chemical formulas. The raw materials are isopropyltriphenylphosphine iodide, cuprous iodide, and H3PO2. Place them in a reaction vessel (beaker or reaction kettle, etc.) and add ethanol and acetonitrile to dissolve them until the solution is clear.

[0044] Step 2: Place the solution obtained in Step 1 into a large, open, flat-bottomed container, such as a 20*20cm petri dish.

[0045] Step 3: Place the filter paper into a petri dish containing the solution, allowing the paper to be completely soaked, and let it stand for 6-12 minutes.

[0046] Step 4: Then take out the soaked paper, use a support to suspend and support the paper, lay the paper flat and wait for the solvent to evaporate, and the composite material will then be evenly precipitated on the paper and adhere to the inner and outer surfaces.

[0047] Step 5: After the paper is completely dry, use appropriate transparent tape to seal the surface of the paper scintillation film to isolate it from the air.

[0048] During the preparation process, blockchain evidence storage technology is used to record the entire process, and data mining algorithms are used to mine the data to optimize the solution.

[0049] The present invention provides a method for preparing a copper-based metal halide composite paper X-ray scintillator. This method employs a simple and direct solution synthesis approach, which is easy to operate, avoids complex processes and high-energy equipment, has high repeatability, and can be rapidly mass-produced, avoiding the drawbacks of traditional phosphor preparation such as high temperature and high pressure. Flexible scintillator films can be quickly obtained according to the size of the paper substrate using a base coating method. The raw materials used in this invention are abundant, the production cost is low, and the commercial value is high. It can be applied to fields such as X-ray flat panel detectors and CT detectors. This method solves the technical problems of low spatial resolution and material toxicity in existing scintillators, which limit their use in X-ray imaging.

[0050] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A method for preparing a copper-based metal halide composite paper X-ray scintillator, characterized in that, Including the following: According to the chemical formula Ma·CubIc, the raw materials of each element are weighed in proportion, and after weighing, they are directly added to the solvents ethanol and acetonitrile for stirring and heating (50-100℃) to react and obtain a transparent solution. Place the prepared transparent solution in an open, flat-bottomed container; Place the substrate material into a petri dish containing the solution, ensuring the substrate material is completely wetted; Then, the soaked paper is removed, and the substrate material is suspended and supported by a support. The substrate material is laid flat and left to wait for the solvent to evaporate. The phosphor is then uniformly precipitated and adhered to the inner and outer surfaces of the substrate material. After the substrate material has completely dried, use transparent tape to seal the surface of the appropriate scintillator film to isolate it from the air.

2. The method for preparing a copper-based metal halide composite paper X-ray scintillator as described in claim 1, characterized in that, In the chemical formula Ma·CubIc, M is C 21 H 22 PI (isopropyltriphenylphosphine iodide); a, b, and c are molar coefficients, and their ranges are 1 ≤ a ≤ 3, 1 ≤ b ≤ 2, and 2 ≤ c ≤ 4.

3. The method for preparing a copper-based metal halide composite paper X-ray scintillator as described in claim 2, characterized in that, The open-topped, flat-bottomed container used was a 20*20cm petri dish.

4. The method for preparing a copper-based metal halide composite paper X-ray scintillator as described in claim 3, characterized in that, The base material used is "paper", including weighing paper and filter paper.

5. The method for preparing a copper-based metal halide composite paper X-ray scintillator as described in claim 4, characterized in that, In the step "Place the substrate material into a petri dish containing the solution and allow the substrate material to be completely immersed", after the substrate material is completely immersed, it needs to stand for 6-12 minutes.

Images