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Preparation method of mecury tungstate nanometer material

A technology of tungstic acid and tungsten source, which is applied in chemical instruments and methods, mercury compounds, tungsten compounds, etc., can solve the problems that there is no preparation method of mercury tungstate nanomaterials, difficult to control the shape of products, and high requirements for reaction temperature. Achieve the effect of avoiding product aggregation, low production cost and low cost

Inactive Publication Date: 2008-01-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above three reaction methods all have problems such as complicated operation, high requirement for reaction temperature (above 600°C), high cost, generation of toxic gas, difficulty in controlling product morphology, etc., making it difficult to scale production
So far, there have been no research reports on the preparation method of mercury tungstate nanomaterials at home and abroad.

Method used

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  • Preparation method of mecury tungstate nanometer material
  • Preparation method of mecury tungstate nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 0.002 moles of HgCl respectively 2 and Na 2 WO 4 , and then were dissolved in 20 ml of distilled water to make a concentration of 0.10 mol / L HgCl 2 and Na 2 WO 4 solution, and then divide it into two 100ml beaker containers.

[0029] (2) First fill the HgCl 2 The beaker of the solution was placed in the ultrasonic reactor. Under ultrasonic conditions, the same volume and concentration of Na prepared in step (1) 2 WO 4 The solution was slowly dropped into it at a speed of 0.04 ml / min, and ultrasonicated for 6 hours, then left to stand for 1 hour, and then centrifuged, and the precipitated products obtained by centrifugation were washed with distilled water and absolute ethanol alternately for 3 to 6 times. The product of the present invention can be obtained.

[0030] The product obtained in step (2) is stored in absolute ethanol, and the morphology and structure of the product are characterized by transmission electron microscope (TEM) and X-ray powde...

Embodiment 2

[0032] Weigh 0.006 moles of HgCl 2 and Na 2 WO 4 , and then dissolved in 20 ml of distilled water to make a concentration of 0.30 mol / L HgCl 2 and Na 2 WO 4 solution, and then divide it into two 100ml beaker containers. Other conditions and steps are exactly the same as in Example 1, and the obtained product is HgWO with a diameter of about 300 nanometers and a length of about 550 nanometers. 4 The crystal system of the quasi-nanometer spindle is the same as in Example 1. The product has high purity and good crystallinity. Compared with Example 1, the degree of blue shift of the fluorescence peak is smaller.

Embodiment 3

[0034] HgCl in step (2) 2 The solution was dropped into Na 2 WO 4 solution, and the standing time was 4 hours, other conditions and steps were exactly the same as in Example 1, and the product obtained was HgWO with a diameter of about 250 nanometers and a length of about 380 nanometers. 4 The crystal system of the quasi-nano short rod is the same as that of Example 1. The product has high purity, good crystallinity and optical properties. Compared with Example 1, the degree of blue shift of the fluorescence peak is smaller.

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Abstract

The present invention belongs to the field of nanometer high molecular material technology, and is especially nanometer mercury tangstenate material preparing process. After mercury salt and tungsten source in the molar ratio of 1 to 1 are weighed and dissolved in water to form solution of concentration 0.05-0.30 mol / L separately in two containers, one kind of solution is set inside ultrasonic reactor and the other kind of solution is dropped into the ultrasonic reactor in the rate of 0.02-20.00 ml / min. through further ultrasonic treatment for 0-6 hr, stilling, centrifugally separating and washing, the product in the grain size of 100-2000 nm is obtain. The present invention provides one new way for controlled synthesis of nanometer material.

Description

technical field [0001] The invention belongs to the technical field of polymer nanomaterials, and in particular relates to a preparation method of mercury tungstate. Background technique [0002] Mercury tungstate powder and its crystal materials have broad application prospects in optics, electronics, biology, coatings, medicine and other industries due to their unique structural properties, physical and chemical properties, scintillation properties and luminescent properties, which have attracted people's attention. Among them, the most striking is that they can be used as scintillator luminescent materials and widely used as detectors in factories, medicine and scientific research. [0003] However, since the crystal structure of mercury tungstate is more specific than that of other divalent metal tungstates, its synthesis is more difficult. So far, only a few scientists have devoted themselves to the preparation and performance research of mercury tungstate powder and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G13/00C01G41/00B82B3/00
Inventor 吴庆生贾润萍丁亚平
Owner TONGJI UNIV
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