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Application of nano metal oxide in catalyzing persulfate to degrade organic dyes

A nano metal, persulfate technology, applied in metal/metal oxide/metal hydroxide catalyst, chemical/physical process, physical/chemical process catalyst, etc., can solve the problem of low catalytic performance, difficult practical application, no priority Crystal plane orientation and other issues, to achieve the effect of less dosage, excellent degradation ability and outstanding performance

Active Publication Date: 2020-12-29
中国科学院上海硅酸盐研究所苏州研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects of the above-mentioned conventional methods make its practical application more difficult, and there is an urgent need for energy-saving, fast and environmentally friendly preparation methods to promote the practical application of persulfate catalytic oxidation methods in the field of wastewater treatment
In addition, most of the currently prepared persulfate catalysts have no preferred crystal plane orientation, and their catalytic performance is low.

Method used

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  • Application of nano metal oxide in catalyzing persulfate to degrade organic dyes
  • Application of nano metal oxide in catalyzing persulfate to degrade organic dyes
  • Application of nano metal oxide in catalyzing persulfate to degrade organic dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 2.5g cupric chloride dihydrate was ground in a mortar for five minutes, then 0.6g sodium hydroxide and 0.8g sodium carbonate were ground for five minutes, then mixed together and ground for thirty minutes to obtain a catalyst precursor, after centrifugal washing three times, Dry at 60°C for 24 hours, then keep at 120°C for 8 hours, put it into a muffle furnace and bake at 400°C for 2 hours, and finally obtain the copper oxide catalyst used in this experiment. The obtained sample is in the form of brown powder. figure 1 The SEM photo of the prepared copper oxide shows that the particle size of the copper oxide is 30-80nm. figure 2 is the XRD pattern of the prepared copper oxide.

[0047] Add 30 mg of the above-mentioned copper oxide catalyst into 100 ml of an aqueous solution containing 50 mg of potassium peroxodisulfate and 50 mg of rhodamine B, react at room temperature for a certain period of time under stirring, use a syringe to pipette 5 ml of the reaction solution...

Embodiment 2

[0049] 2.5g cupric chloride dihydrate was ground in a mortar for five minutes, then 0.6g sodium hydroxide and 0.8g sodium carbonate were ground for five minutes, then mixed together and ground for thirty minutes to obtain a catalyst precursor, after centrifugal washing three times, Dry at 60°C for 24 hours, then keep at 120°C for 8 hours, put it into a muffle furnace and bake at 400°C for 2 hours, and finally get the copper oxide catalyst used in this experiment. The obtained sample is in the form of brown powder. The crystal face (110) is the main one.

[0050] Add 30 mg of the above-mentioned copper oxide catalyst into 100 ml of an aqueous solution containing 50 mg of potassium persulfate (Oxone) and 50 mg of rhodamine B, and react under stirring. After reacting for a certain period of time, use a syringe to pipette 5ml of the reaction solution, filter the solid catalyst quickly and measure its absorbance at a wavelength of 540nm, and calculate the degradation rate of rhodam...

Embodiment 3

[0052] 1.5 g of ferrous sulfate heptahydrate was ground in a mortar for five minutes, then 3 g of ferric chloride hexahydrate was ground for five minutes, then 0.8 g of sodium hydroxide was ground for five minutes, then mixed together and ground for thirty minutes to obtain a catalyst precursor The body was washed by centrifugation for three times, dried at 60°C for 24 hours, kept at 120°C for 8 hours, put into a muffle furnace and roasted at 400°C for 2 hours, and finally obtained the ferric oxide catalyst used in this experiment. The sample is in the form of brown powder, mainly exposed high-energy crystal faces (311), and the particle size is 20-60nm. image 3 is the XRD pattern of the prepared ferric oxide.

[0053] Add 30 mg of the above ferric oxide catalyst into 100 ml of an aqueous solution containing 50 mg of potassium peroxodisulfate and 50 mg of rhodamine B, and react under stirring. After reacting for a certain period of time, use a syringe to pipette 5ml of the r...

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Abstract

The invention relates to an application of nano metal oxide in catalyzing persulfate to degrade organic dyes; the nano metal oxide and the persulfate are added into wastewater containing the organic dyes to catalyze the persulfate to generate an active substance so as to realize degradation of the organic dyes, and the persulfate comprises peroxymonosulfate or / and peroxydisulfate; the nano metal oxide is at least one of nano CuO, nano NiO and nano Fe3O4, and the size of the nano metal oxide is smaller than 100 nm; the nano metal oxide has a high-energy crystal face, the high-energy crystal face of the nano CuO is a (110) crystal face, the high-energy crystal face of the nano NiO is a (110) or (111) crystal face, and the high-energy crystal face of the nano Fe3O4 is a (311) crystal face.

Description

technical field [0001] The invention relates to a nanometer metal oxide and a preparation method thereof, in particular to a nanometer metal oxide for catalyzing persulfate degradation of organic dyes, a preparation method and application thereof. Background technique [0002] In today's world, with the rapid development of global industry, more and more pollutants have entered water bodies, and a large amount of industrial wastewater has seriously threatened environmental safety and human health. Traditional methods of purifying water are usually through biodegradation or physical and chemical treatment, followed by filtration and adsorption. Although this method is very commonly used, it has the disadvantages of many processing steps, complex process, high equipment requirements, and unstable processing effect. Therefore, due to the limited floor area available in general, newly-built sewage treatment devices have higher requirements for process integration and treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/72B01J23/755C02F1/72C02F101/30
CPCB01J23/745B01J23/72B01J23/755C02F1/725C02F2101/308Y02W10/37
Inventor 刘阳桥翦松赞顾雅洁
Owner 中国科学院上海硅酸盐研究所苏州研究院
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