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Bismuth oxychloride powder and preparation method thereof

A bismuth oxychloride powder technology, applied in the field of bismuth oxychloride powder and its preparation, can solve the problems of reducing the specific surface area of ​​bismuth oxychloride

Inactive Publication Date: 2013-05-15
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method does not effectively reduce the size of bismuth oxychloride to increase its specific surface area, and most of the reaction conditions adopt a strong acid environment or a strong alkali environment, so it is not an environmentally friendly preparation method

Method used

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  • Bismuth oxychloride powder and preparation method thereof
  • Bismuth oxychloride powder and preparation method thereof
  • Bismuth oxychloride powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 1.2 grams of bismuth nitrate pentahydrate into 0.8 milliliters of concentrated nitric acid, add 25 milliliters of deionized water after preliminary stirring, stir to dissolve and dilute, and record it as solution A. Another 10 milliliters of ammonium chloride solution with a substance concentration of 0.5 mol / liter was prepared, which was designated as solution B.

[0024] Add solution A dropwise to solution B, and stir while adding dropwise to form a uniform suspension. The pH of the solution was adjusted to approximately 7 with 15% ammonia water, and then the suspension was placed in a 50 ml stainless steel autoclave lined with polytetrafluoroethylene, and reacted at a temperature of 423K for 18 hours. After the reaction is finished, the precipitated product is washed with deionized water and dried to obtain bismuth oxychloride powder.

[0025] The prepared bismuth oxychloride (BiOCl) crystal form is consistent with the standard powder diffraction card (JCPDS: 85...

Embodiment 2

[0027] Add 2.0 g of bismuth nitrate pentahydrate to 1 ml of concentrated nitric acid, add 40 ml of deionized water after preliminary stirring, stir to dissolve and dilute, and record it as solution A. Another preparation of 20 milliliters of ammonium chloride solution with a substance concentration of 1 mol / liter is referred to as solution B.

[0028] Add solution A dropwise to solution B, and stir while adding dropwise to form a uniform suspension. Adjust the pH of the solution to about 7 with 25% ammonia water, then put the suspension into a 100 ml Teflon-lined stainless steel autoclave, and react at a temperature of 393K for 24 hours. After the reaction is finished, the precipitated product is washed with deionized water and dried to obtain bismuth oxychloride powder.

[0029] The prepared bismuth oxychloride (BiOCl) crystal form is consistent with the standard powder diffraction card (JCPDS: 85-0861), and the morphology is a flower-like cluster of nanocrystalline particle...

Embodiment 3

[0031] Add 5 grams of bismuth nitrate pentahydrate into 3 milliliters of concentrated nitric acid, add 120 milliliters of deionized water after preliminary stirring, stir to dissolve and dilute, and record it as solution A. Another preparation of 20 milliliters of ammonium chloride solution with a substance concentration of 1.5 mol / liter is referred to as solution B.

[0032] Add solution A dropwise to solution B, and stir while adding dropwise to form a uniform suspension. The pH of the solution was adjusted to approximately 7 with 20% ammonia water, and then the suspension was placed in a 200 ml stainless steel autoclave lined with polytetrafluoroethylene, and reacted at a temperature of 403K for 36 hours. After the reaction is finished, the precipitated product is washed with deionized water and dried to obtain bismuth oxychloride powder.

[0033] The prepared bismuth oxychloride (BiOCl) crystal form is consistent with the standard powder diffraction card (JCPDS: 85-0861),...

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Abstract

The invention relates to a bismuth oxychloride powder and its preparation method. A single bismuth oxychloride nanocrystal grain is irregular in shape, and has a size of 50-150 nanometers; and a plurality of nanocrystal grains aggregate into clusters with a size of 0.8-2 micrometers. The preparation method specifically consists of: adding a bismuth salt solution acidified by nitric acid into an ammonium chloride solution of certain concentration, conducting rapid stirring to form a uniform suspension liquid, and using ammonia water to adjust the pH to neutrality, then subjecting the suspension liquid to a one-step hydrothermal treatment, thus obtaining the bismuth oxychloride powder. The preparation method has the advantages of simple process, wide parameter adjustable range, strong repeatability as well as low cost, thus being a preparation method with business prospects. The prepared bismuth oxychloride powder can be widely applied in daily use chemicals, environmental protection, plastics, paint, electronics and other industries and fields.

Description

technical field [0001] The invention relates to a bismuth oxychloride powder and a preparation method thereof, in particular to a cluster formed by nano-scale bismuth oxychloride crystal grains, belonging to the technical field of inorganic nanomaterials and synthesis. Background technique [0002] Bismuth oxychloride is a new type of high-grade environmentally friendly pigment, which can be widely used in automotive interior decoration materials, plastics, electronic equipment, sporting goods, inks, accessories for clothing accessories, etc. Bismuth oxychloride is also a high-grade and environmentally friendly pearlescent material. It is non-toxic, low oil absorption, strong skin adhesion and pearlescent effect, making it an important raw material in the synthesis of cosmetics. In addition, bismuth oxychloride pearl paste is widely used in coatings, bismuth oxychloride powder can be used to manufacture artificial pearls, and nano-sized bismuth oxychloride grains can be used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y40/00
Inventor 陈超赵斌何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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