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Method for preparing stable nanometer cuprous oxide whiskers with chemical precipitation method

A technology of nano-cuprous oxide and chemical precipitation method, which is applied in chemical instruments and methods, single crystal growth, crystal growth, etc., and can solve the problems of no nano-Cu2O whiskers found and no nano-Cu2O whiskers yet prepared

Inactive Publication Date: 2004-04-21
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, nano-Cu has not been prepared by these chemical and physical methods 2 O whiskers, and no nano-Cu 2 O Whisker's Patent Emerges

Method used

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  • Method for preparing stable nanometer cuprous oxide whiskers with chemical precipitation method

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Embodiment 1

[0018] Example 1: 3.5 g of copper sulfate, 3.0 g of sodium hydroxide, and 0.030 g of cetyltrimethylammonium bromide were added to an 800 mL reactor, stirred ultrasonically for 30 minutes, and 0.2 g of hydrazine hydrate was added at 30 ° C. React while stirring under the condition of blocking the air. After 3 hours, centrifuge or filter to remove the aqueous solution, wash the precipitate with distilled water for 3 times, and put it into 1×10 -3 M was stabilized in a solution of benzotriazole for 24 hours, and finally centrifuged to remove impurities, and the obtained reddish-brown solid was dried in a vacuum dryer at 60°C.

[0019] The obtained Cu was observed by transmission electron microscopy (TEM) 2 O is aggregated sheet-like nanowhiskers, Cu was observed under high-resolution TEM 2 O is mainly rod-shaped whiskers, about 200nm long and 20nm wide, with some cavities on the crystal. The reddish-brown nano-Cu 2 The O crystals remained unchanged in color and structure after...

Embodiment 2

[0020] Example 2: In the solution described in Example 1, add copper acetate 5.0g, sodium hydroxide 4.0g, polyvinylpyrrolidine copper 0.1g, after ultrasonic stirring, add glucose 2.0g at room temperature, and isolate the air after 2 hours , washed, and at 1 x 10 -3 M hydroquinone was stabilized for 24 hours, washed by centrifugation, and the resulting red solid was dried in a vacuum oven. TEM observation found that Cu 2 O is a nano-whisker that combines rods and needles, the width in the middle is about 10nm, and the length is about 300nm.

Embodiment 3

[0021] Example 3: In the solution described in Example 1, 4.0 g of copper nitrate, 5.0 g of sodium hydroxide, and 0.2 g of polyethylene glycol were added, and after ultrasonic stirring was sufficient, 0.3 g of hydroxylamine hydrochloride was added at room temperature, and after fully stirring for 3 hours , washed and in 1 x 10 -3 After being stabilized in the benzotriazole solution of M for 24 hours, it was filtered and washed, and the obtained red solid was dried in a vacuum oven. TEM observation found that Cu 2 O is a needle-shaped nano whisker with a diameter of about 10-20 nm and a length of about 250-350 nm.

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Abstract

A process for preparing the stable nano-class cuprous oxide crystal whisker by chemical deposition method includes such steps as using reducer chosen from glucose, hydrazine hydrate, hydroxyamin hydrochloride, sodium borohydride and sulfite to reduce the 2-valence Cu ions to Cu2O in water medium, preparing micron (or nano) powder, adding crystalline growth inhibitor, controlling reaction time and condition, and treating with antioxidizing agent to obtain bar and / or needle whisker.

Description

technical field [0001] The invention belongs to the preparation method of nano-cuprous oxide whisker with photoelectrochemical properties, special optical and electrical properties, and chemical catalytic properties. Background technique [0002] Cuprous oxide (Cu 2 O) is a p-type semiconductor material with a wide range of uses. It can be used as a catalyst in organic synthesis, as well as anti-corrosion coatings and insecticides for ships, and it can also be used in ceramics and electronic devices. Due to the quantum size effect, nanoscale Cu 2 O has special optical, electrical, and photoelectrochemical properties, and has potential applications in solar cells, sensors, superconductors, hydrogen production, and electrochromism. Some experts even predict that nano-Cu 2 O can deal with organic pollutants in the environment. while nano Cu 2 O whiskers will have more excellent properties in photoelectrochemistry, some light and electricity because of their special rod-lik...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B29/62
Inventor 余颖杜飞鹏杨胜钧李家麟
Owner HUAZHONG NORMAL UNIV
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