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Preparation method of cadmium tungstate monocrystal nanoribbon

A single crystal nanometer, cadmium tungstate technology, applied in the field of nanomaterials, can solve the problems of difficult process control, high temperature, long cycle, etc., and achieve the effects of simple equipment, high yield and short cycle

Inactive Publication Date: 2014-06-04
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of cadmium tungstate single crystal nanobelt, which solves the problems of high temperature, high energy consumption, long cycle and difficult process control in the existing preparation method of cadmium tungstate material, and improves Morphology and size distribution of cadmium tungstate

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  • Preparation method of cadmium tungstate monocrystal nanoribbon
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  • Preparation method of cadmium tungstate monocrystal nanoribbon

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preparation example Construction

[0020] The preparation method of cadmium tungstate single crystal nanobelt of the present invention adopts soluble cadmium salt as cadmium source, uses water as medium, under the situation that surfactant sodium dodecylbenzenesulfonate (sodium dodecylbenzenesulfonate, SDBS) participates, Sodium tungstate was used as a precipitating agent to obtain a suspension solution at room temperature. Then, through hydrothermal reaction, filtration, washing and drying, single crystal cadmium tungstate nanobelts with wolframite structure can be obtained. Specifically follow the steps below:

[0021] Step 1: Grinding the soluble cadmium salt into finer powder at room temperature, dissolving in deionized water to obtain a molar concentration of 0.1-0.3mol L -1 transparent solution. The soluble cadmium salt is cadmium nitrate or cadmium chloride.

[0022] Step 2: In the case of stirring, add surfactant SDBS to the cadmium salt solution obtained in step 1, and the concentration of SDBS in t...

Embodiment 1

[0030] Dissolve cadmium nitrate in deionized water after grinding to obtain a concentration of 0.1mol L -1 cadmium nitrate transparent solution; in the case of stirring, add surfactant SDBS to the cadmium nitrate solution, the amount of SDBS added, so that the SDBS concentration in the final solution is 0.005mol L -1 ; Set the concentration to 0.4mol L -1Sodium tungstate solution was added to the above solution, the transparent solution turned into an opaque suspension, and continued to stir vigorously for 1h; then, use 1mol L -1 hydrochloric acid solution and sodium hydroxide solution to adjust the pH value of the suspension to 7, and continue stirring for 0.5 h.

[0031] After stirring, move the suspension to a 100ml polytetrafluoroethylene-lined stainless steel reactor, add the suspension to 3 / 4 of the volume of the reactor, tighten the top cover of the reactor, and heat it in an electric furnace until the temperature reaches Predetermined temperature and heat preservatio...

Embodiment 2

[0034] Dissolve cadmium nitrate in deionized water after grinding to obtain a concentration of 0.3mol L -1 cadmium nitrate transparent solution; in the case of stirring, add surfactant SDBS to the cadmium nitrate solution, the amount of SDBS added, so that the SDBS concentration in the final solution is 0.015mol L -1 ; Set the concentration to 0.8mol L -1 Sodium tungstate solution was added to the above solution, the transparent solution turned into an opaque suspension, and the vigorous stirring was continued for 3 hours; then 1mol L -1 hydrochloric acid solution and sodium hydroxide solution to adjust the pH value of the suspension to 9, and continue stirring for 1 h.

[0035] After stirring, move the suspension to a 100ml polytetrafluoroethylene-lined stainless steel reactor, add the suspension to 3 / 4 of the volume of the reactor, tighten the top cover of the reactor, and heat it in an electric furnace until the temperature reaches Predetermined temperature and heat prese...

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Abstract

The invention discloses a preparation method of a cadmium tungstate monocrystal nanoribbon, wherein the cadmium tungstate nanoribbon with unique shape and better uniformity in dimensional distribution is prepared by taking a soluble cadmium salt and sodium tungstate as raw materials, a surfactant SDBS (Sodium Dodecyl Benzene Sulfonate) as an additive and water as a medium, and strictly regulating reaction temperature, addition amount of the surfactant SDBS and a solution pH value. The nenoribbon is small in width and good in shape, has a wolframine nomocrystal structure, and is 60-120nm in width, 1.2-2.5mum in length and 20nm in thickness. The preparation method disclosed by the invention has the advantages of easily obtainable raw materials, simple equipment, low energy consumption, short cycle, low preparation cost, high yield, and safety and reliability for operation; the product has the characteristics of unique shape and dimension, good technical repeatability and sable quality, is easy to prepare on a large scale, and can be widely applied to various fields of nanometer-device XCT (X-ray Transcission Computed Tomography) detectors, radioactive nucleus spectrum and radioactivity determining and nuclear medical instruments and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a preparation method of a cadmium tungstate material, in particular to a preparation method of a cadmium tungstate single crystal nanobelt. Background technique [0002] Cadmium tungstate belongs to the monoclinic system, and its crystal structure is the same as that of zinc tungstate, which belongs to wolframite structure. Its lattice constants are a=0.5029nm, b=0.5859nm, c=0.5074nm, β=91.47°. Cadmium tungstate crystal has the advantages of high average refractive index, high X-ray absorption coefficient, low radiation damage, high luminous intensity and low afterglow, and is considered to be a luminescent material with application prospects. CdWO at room temperature 4 Often used as an X-ray scintillator. Cadmium tungstate scintillators have the advantages of high efficiency, short decay time, high stopping energy and high chemical stability, and are difficult to be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B7/10C30B29/32C30B29/60
Inventor 高宾张晓军
Owner XI'AN POLYTECHNIC UNIVERSITY
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