Method for synthesizing nano-zinc oxide by micro-emulsion carbon black adsorption precipitation method

A nano-zinc oxide, adsorption and precipitation technology, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of increasing the particle size of nanoparticles and asynchronous process of precipitation reaction, etc., and achieve low production cost Effect

Inactive Publication Date: 2014-05-07
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a certain concentration gradient is unavoidably produced during the mixing process, resulting in the asynchronous process of precipitation reactions in different regions of the microemulsion, and the particle size distribution of the synthesized nanoparticles becomes wider, and the zinc oxide particles produced are prone to agglomeration, Sintering, the particle size of the synthesized nanoparticles increases

Method used

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  • Method for synthesizing nano-zinc oxide by micro-emulsion carbon black adsorption precipitation method
  • Method for synthesizing nano-zinc oxide by micro-emulsion carbon black adsorption precipitation method

Examples

Experimental program
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Embodiment 1

[0022] (1) Dissolve 0.136 g of zinc chloride in 0.1 mol / L hydrochloric acid solution to prepare 10 mL of zinc chloride solution with a concentration of 0.1 mol / L to obtain solution A;

[0023] (2) Dissolve 0.6 g of cetyltrimethylammonium bromide CTAB in 200 mL of cyclohexane to obtain solution B, measure 5 mL of solution A, slowly add it to solution B, stir, and simultaneously add 7 mL of n-butyl Alcohol until the system changes from a milky white opaque emulsion to a colorless, clear and stable microemulsion, then measure 0.024 g of carbon black, add it to the cyclohexane system, continue to stir and ultrasonically oscillate for a total of 2 hours to obtain a mixed system C;

[0024] (3) Dissolve 0.6g of cetyltrimethylammonium bromide CTAB in 200mL of cyclohexane, add dropwise 8ml of ammonia solution with a concentration of 0.3 mol / L prepared with concentrated ammonia water, and add dropwise 7 mL of n-butyl Alcohol to the system from milky white opaque emulsion to colorless, ...

Embodiment 2

[0027] (1) Dissolve 0.34 g of zinc chloride in 0.05mol / L hydrochloric acid solution to prepare 50 mL of 0.05mol / L zinc chloride solution to obtain solution A;

[0028] (2) Dissolve 0.7 g of cetyltrimethylammonium bromide CTAB in 190 mL of cyclohexane to obtain solution B, measure 7 mL of solution A, slowly add it to solution B, stir, and simultaneously add 8 mL of n-butyl Alcohol until the system changes from a milky white opaque emulsion to a colorless, clear and stable microemulsion, then weigh 0.0168 g of carbon black, add it to the cyclohexane system, continue to stir and ultrasonically oscillate for a total of 2 hours to obtain a mixed system C;

[0029] (3) Dissolve 0.7g of cetyltrimethylammonium bromide CTAB in 190mL of cyclohexane, add dropwise 8ml of ammonia solution with a concentration of 0.3 mol / L prepared with concentrated ammonia water, and add dropwise 8 mL of n-butyl Alcohol to the system from milky white opaque emulsion to colorless, clear and stable microemul...

Embodiment 3

[0032] (1) Dissolve 0.109 g of zinc chloride in 0.1 mol / L hydrochloric acid solution to prepare 10 ml of 0.08 mol / L zinc chloride solution to obtain solution A;

[0033] (2) Dissolve 0.8 g of cetyltrimethylammonium bromide CTAB in 210 mL of cyclohexane to obtain solution B, measure 8 mL of solution A, slowly add it to solution B, stir, and drop 9 mL of n-butyl Alcohol until the system changes from a milky white opaque emulsion to a colorless, clear and stable microemulsion, then weigh 0.0307 g of carbon black, add it to the cyclohexane system, continue to stir and ultrasonically oscillate for a total of 2 hours to obtain a mixed system C;

[0034] (3) Dissolve 0.8g of cetyltrimethylammonium bromide CTAB in 210mL of cyclohexane, add dropwise 9 ml of ammonia solution with a concentration of 0.3 mol / L prepared with concentrated ammonia water, and add dropwise 9 mL of Butanol to system from milky white opaque emulsion to colorless, clear and stable microemulsion D;

[0035] (4) M...

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Abstract

The invention discloses a method for synthesizing nano-zinc oxide by a micro-emulsion carbon black adsorption precipitation method. The method for synthesizing nano-zinc oxide comprises the following steps: using zinc oxide, carbon black and ammonia water as raw materials, dripping a cyclohexane micro-emulsion system prepared by ammonia solution to a cyclohexane micro-emulsion system consisting of zinc chloride and carbon black, performing precipitation reaction after mixing and stirring at normal temperature and performing vacuum distillation, multiple washing, drying, grinding and calcination on the precipitate adsorbed by carbon black, and obtaining high thermal-stability nano-zinc oxide. The method is mild in reaction conditions, high in yield, and capable of preventing ultrafine zinc oxide from agglomerating and sintering to some extent; and the obtained products have the characteristics of high crystallinity, large specific surface area, small particle size, and good photo-catalytic performance.

Description

technical field [0001] The invention relates to a method for synthesizing nano-zinc oxide by microemulsion carbon black adsorption and precipitation method, belonging to the technical field of nano-material preparation. Background technique [0002] Nano zinc oxide is a new type of high-function fine inorganic product. Nanoscale ZnO has surface effect, quantum size effect and small size effect, etc. Compared with ordinary ZnO, it shows many special properties, such as non-toxicity, non-migration, fluorescence, piezoelectricity, conductivity, etc., and in Transparent in the visible light range, high reflectivity in the infrared band and other characteristics. Therefore, using the photosensitive theory of zinc oxide semiconductors, nano-zinc oxide can be used as a highly efficient photocatalyst for degrading organic pollutants in wastewater and purifying the environment. [0003] In order to improve the photocatalytic activity of ZnO, ZnO must have small particle size, large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82Y30/00
Inventor 王震平许嘉郭贵宝安胜利介瑞华
Owner INNER MONGOLIA UNIV OF SCI & TECH
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