Method for preparing Nano material of lead tungstate

A technology of nanomaterials and lead tungstate, applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., to achieve the effect of convenient raw material acquisition, regular shape and low price

Inactive Publication Date: 2007-10-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There are relatively few reports on the hydrothermal synthesis of lead tungstate materials. Most of the pr...

Method used

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  • Method for preparing Nano material of lead tungstate
  • Method for preparing Nano material of lead tungstate
  • Method for preparing Nano material of lead tungstate

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Prepare 1mol / L Pb(NO 3 ) 2 100ml aqueous solution and 1mol / L NaWO 4 100ml of aqueous solution (the reagents used are all analytical alcohols). Take 1ml each and add it to a 100ml beaker for mixing, then add 0.001mol CTAB (cetyltrimethylammonium bromide), then add a certain amount of deionized water and stir at room temperature for about 1 hour, then transfer into 50ml polytetrafluoroethylene In the ethylene reactor, add deionized water to the reactor to 60%-65% of the volume of the reactor, seal it, and react at 120° C. for 3 hours. The reaction kettle was naturally cooled to room temperature.

[0025] (2) The product is taken out, washed 7-8 times with deionized water and absolute ethanol, centrifuged and dried, and the final product is dispersed in absolute ethanol to obtain the desired product.

[0026] The morphology and structure of the product were characterized by scanning electron microscopy (SEM) and X-ray powder diffractometer (XRD). It can be seen...

Embodiment 2

[0028] Prepare 1mol / L PbAc respectively 2 Aqueous solution 100ml and 1mol / L NaWO 4 100ml of aqueous solution (the reagents used are all analytical alcohols). Take 1ml each and add it to a 100ml beaker for mixing, then add 0.002mol SDS (hexadecyltrimethylammonium bromide), then add a certain amount of deionized water and stir at room temperature for about 1 hour, then transfer into 50ml polytetrafluoroethylene In the ethylene reactor, add deionized water to the reactor to 65%-70% of the volume of the reactor, seal it, and react at 140° C. for 6 hours. The reaction kettle was naturally cooled to room temperature. The product is taken out, washed 3-6 times with deionized water and absolute ethanol, centrifuged and dried, and the final product is dispersed in absolute ethanol to obtain the desired product. The obtained product is pagoda-shaped PbWO 4 Quasi-nanometer material, the crystal system of the product is the same as in Example 1. The product has high purity and go...

Embodiment 3

[0030] Prepare 1mol / L PbCl respectively 2 Aqueous solution 100m and 1mol / L NaWO 4 100ml of aqueous solution (the reagents used are all analytical alcohols). Take 0.8mlPbCl respectively 2 aqueous solution and 1ml NaWO 4 Put the aqueous solution into a 100ml beaker, then add 0.0015mol CTAB (cetyltrimethylammonium bromide), then add a certain amount of deionized water and stir at room temperature for about 1 hour, then move it into a 50ml polytetrafluoroethylene reactor , add deionized water to the reactor to 60%-63% of the volume of the reactor, seal it, and react at 160° C. for 12 hours. The reaction kettle was naturally cooled to room temperature. The product was taken out, washed with deionized water and absolute ethanol, centrifuged and dried, and the final product was dispersed in absolute ethanol to obtain the desired product. , the obtained product is PbWO with a diameter of about 150 nm 4 Nanoparticles, the crystal system of the product is the same as in Exampl...

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Abstract

This invention relates to a method for synthesizing lead tungstate nanomaterial. The method comprises: placing sodium tungstate and lead salt in a container, adding deionized water and additives, reacting at room temperature for 40-60 min, transferring to a reaction kettle, adding deionized water (60-70 vol. % of the reaction kettle), sealing, reacting at 120-160 deg.C for 3-12 h, naturally cooling to room temperature, taking out the product, washing, centrifuging for separation, drying, and dispersing the product in absolute ethanol. The method has such advantages as abundant raw materials, simple process, simple apparatus, high product purity, convenient post treatment, and no pollution.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials, and in particular relates to a preparation method of lead tungstate nanomaterials. Background technique [0002] In recent years, with the development of high-energy physics, it has been found that PbWO4 (PWO) crystal has special advantages in exploring new scintillators, especially its high density (8.3g / cm 3 ), short irradiation length (0.89cm), fast luminescence decay time (90% of the luminescence decay time is less than 20ns) and low price, so it was selected by CERN as the compact IU meson in the Large Hadron Collider The core component of the spiral detector (compact muon solenoid, CMS) is the scintillator material for the electromagnetic calorimeter. [0003] As a luminescent material, lead tungstate crystal has attracted widespread attention due to its luminescent properties and potential application value. Previous studies have shown that lead tungstate crystals e...

Claims

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Application Information

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IPC IPC(8): C01G41/00C01G21/00B82B3/00
Inventor 庄凌吴庆生孙冬梅刘心波李升
Owner TONGJI UNIV
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