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Organic dye adsorbent namely gold doped cuprous oxide and preparation method thereof

A technology of cuprous oxide and organic dyes, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of cuprous oxide and its composite materials, etc. The effect of adsorption efficiency

Inactive Publication Date: 2010-08-11
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on its use in the preparation of cuprous oxide and its composite materials

Method used

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  • Organic dye adsorbent namely gold doped cuprous oxide and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1 prepares copper hydrogen (CuH) precursor

[0018] (1) Weigh 4.8g anhydrous copper sulfate (CuSO 4 ) into 28.2ml ultrapure water (18.25MΩ), keep the temperature in an oil bath at 45°C for 20 minutes, and evenly dissolve it into a copper sulfate solution under the condition of stirring at 600 rpm with a magnet, and make the concentration of copper sulfate 0.6ml / L;

[0019] (2) add hypophosphorous acid (content 30%-35%) in above-mentioned copper sulfate solution, the add-on of described hypophosphorous acid is 21.2ml, stirs strongly with magneton all the time in the reaction process, reacts after 15min and is cooled to At room temperature, filter and wash with absolute ethanol several times to obtain a brown-red solid powder, which is transferred to a vacuum oven (without setting the temperature) for storage, and about 3 to 5 grams of copper hydrogen (CuH) powder can be obtained;

[0020] The method for preparing precursor powdery copper hydrogen (CuH) refe...

Embodiment 2

[0021] Example 2 prepares gold-doped cuprous oxide (Au@Cu 2 O), and carry out the adsorption performance test

[0022] (1) Add 20 mg of copper hydrogen (CuH) prepared by the above method to 40 ml of polyvinylpyrrolidone (PVP) ethanol solution, the concentration of polyvinylpyrrolidone in the solution is 15 g / L, and ultrasonic dispersion is used to make the polyvinylpyrrolidone Pyrrolidone is evenly coated on copper hydrogen, and then centrifuged to obtain copper hydrogen solid powder coated with polyvinylpyrrolidone;

[0023] (2) Transfer the copper hydrogen solid powder covered with polyvinylpyrrolidone (PVP) to 40ml of polyvinylpyrrolidone (PVP) aqueous solution, the concentration of polyvinylpyrrolidone in this solution is 10g / L, put it into the magnetic Sub-stirring, the speed of magnetic sub-stirring is about 500 rpm, then add chloroauric acid (HAuCl 4 ) solution, the ratio of gold and copper in the solution was 0.2:1, after 2.5 hours of reaction, centrifuged to obtain ...

Embodiment 3

[0027] Example 3 prepares gold-doped cuprous oxide (Au@Cu2 O), and carry out the adsorption performance test

[0028] (1) Add 20 mg of copper hydrogen (CuH) prepared by the method above to 40 ml of polyvinylpyrrolidone (PVP) ethanol solution, use ultrasonic dispersion to coat polyvinylpyrrolidone evenly on copper hydrogen, and then perform centrifugation, Copper hydrogen solid powder coated with polyvinylpyrrolidone was obtained, and the concentration of polyvinylpyrrolidone was 15g / L;

[0029] (2) Transfer the copper hydrogen solid powder covered with polyvinylpyrrolidone (PVP) to 40ml polyvinylpyrrolidone (PVP) aqueous solution, the concentration of polyvinylpyrrolidone in this solution is 10g / L, put it into the magnetic Sub-stirring, the speed of magnetic sub-stirring is about 500 rpm, then add chloroauric acid (HAuCl 4 ) solution, the ratio of gold and copper in this solution is 0.05:1, after reacting for 2.5 hours, centrifuge to obtain black gold doped with cuprous oxide...

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Abstract

The invention relates to an organic dye adsorbent, in particular to a gold doped cuprous oxide and a preparation method thereof. The preparation method of the gold doped cuprous oxide comprises the following steps: taking copper-hydrogen as a precursor and polyvinyl pyrrolidone as a protective agent, uniformly coating polyvinyl pyrrolidone on copper-hydrogen, then mixing with chloroauric acid in a water solution under normal temperature and pressure for oxidation-reduction reaction for 1-3 hour(s), and obtaining a black micronano level solid powder through centrifugal separation, wherein the percentage composition of gold in weight takes up 1-55 percent of the total weight and the balance is cuprous oxide. The adsorbent has good adsorption effect on dye with sulfonic acid group but has no adsorption effect on other dyes. Therefore, some mixed dye waste liquid can be circularly used. When used as a photo-catalyst, the problem of contacting between the dye and the photo-catalyst during the process of photochemical catalyst can be solved, and the efficiency of photochemical catalyst is improved. Since the light wave absorbed is in the range of the visible light when the invention is used to photo-degrade the organic matter, the invention can be used in daily wastewater treatment and has no nitrogenous matter making the water quality eutrophication.

Description

technical field [0001] The invention relates to an organic dye adsorbent, in particular to a gold-doped cuprous oxide (Au@Cu2O) material and a preparation method thereof. Background technique [0002] my country's textile industry is very developed, and its printing and dyeing industry is also very prosperous. According to statistics, my country produces 150,000 tons of dyes every year, of which about 10%-15% of the dyes will be directly discharged into rivers and seas along with wastewater. Due to the high stability of dyes, and many dyes are rich in certain carcinogens, high-chroma dye wastewater is one of the most difficult but necessary industrial wastewater to treat. [0003] In the prior art, common methods for wastewater treatment include physical adsorption and chemical treatment. The most efficient means of physical adsorption is activated carbon adsorption. Activated carbon has a strong adsorption capacity, and has a good adsorption function for water-soluble dy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
Inventor 黄伟新华青
Owner UNIV OF SCI & TECH OF CHINA
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