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Method for preparing photocatalyst Cu2O based on recovering copper cutting waste

A technology for cutting waste and photocatalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve the waste of resources and safety of electrochemical methods, raw materials for precipitation methods Huge, expensive equipment and other problems, to achieve the effect of low cost, low cost, high cost

Inactive Publication Date: 2019-09-17
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, gas phase method, solvothermal method and hydrothermal method require expensive equipment, resulting in high cost; electrochemical method has waste of resources and safety issues; precipitation method requires huge raw materials, making the process more complicated
Moreover, the precursors used in these methods are all industrially prepared copper salts, and the process is complicated.
[0004] In recent years, with the increase in the amount of metal copper, the cutting waste of copper is also increasing. However, the current treatment method of the same cutting waste adopts pyrometallurgical smelting technology, that is, the copper waste is remelted into ingots. The process is complicated and the energy consumption is high.

Method used

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  • Method for preparing photocatalyst Cu2O based on recovering copper cutting waste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Preparation of photocatalyst Cu based on recycling copper cutting waste 2 O and the method for degrading methyl orange thereof are carried out in the following steps: in the present embodiment, the molten salt used is a chloride molten salt, specifically NaCl-CaCl 2 The mixture, by molar ratio, NaCl:CaCl 2 =0.479:0.521.

[0064] Step 1: NaCl and CaCl 2 salt pretreatment

[0065] (1) NaCl and CaCl 2 Grinding separately to obtain NaCl powder with a particle size of 2mm and CaCl with a particle size of 2mm 2 The powder is ground and poured into a beaker, placed in a muffle furnace and sealed;

[0066] (2) In a vacuum state, heat up to 300°C at a heating rate of 5°C / min and perform pretreatment at a constant temperature for 12 hours to obtain molten salt after dehydration treatment, and then cool down to room temperature to take out the molten salt to obtain dehydrated NaCl and dehydrated After CaCl 2 ;

[0067] Step 2: Pretreatment of Copper Cutting Scrap

[0068]...

Embodiment 2

[0084] Preparation of photocatalyst Cu based on recycling copper cutting waste 2 O and the method for degrading methylene blue thereof are carried out as follows: in the present embodiment, the molten salt used is a chloride molten salt, specifically NaCl-CaCl 2 The mixture, by molar ratio, NaCl:CaCl 2 =0.479:0.521.

[0085] Step 1: NaCl and CaCl 2 salt pretreatment

[0086] (1) NaCl and CaCl 2 Grinding separately to obtain NaCl powder with a particle size of 2mm and CaCl with a particle size of 2mm 2 The powder is ground and poured into a beaker, placed in a muffle furnace and sealed;

[0087] (2) In a vacuum state, at a heating rate of 3°C / min, the temperature was raised to 300°C and kept at a constant temperature for 12 hours for pretreatment to obtain dehydrated molten salt, and then cooled to room temperature to take out the molten salt to obtain dehydrated NaCl and CaCl after dehydration 2 ;

[0088] Step 2: Pretreatment of Copper Cutting Scrap

[0089]Place 1g ...

Embodiment 3

[0105] Preparation of photocatalyst Cu based on recycling copper cutting waste 2 The method of O comprises the following steps:

[0106] Step 1: Pretreatment of molten salt raw material

[0107] Place the molten salt raw material powder sodium carbonate with a particle size of 1mm in a muffle furnace, seal it, and in a vacuum state, raise the temperature to 300°C at a heating rate of 5°C / min and keep the temperature for 12h for dehydration treatment, and then cool the furnace To room temperature, sodium carbonate after dehydration is obtained;

[0108] Step 2: Pretreatment of Copper Cutting Scrap

[0109] Place the copper cutting waste in a muffle furnace, heat it to 1100°C in the air, and oxidize it at a constant temperature for 12 hours to obtain copper oxide powder;

[0110] Step 3: Assembly of reaction system and experimental process

[0111] (1) 100g of dehydrated molten salt raw material is placed in a cleaned and dried corundum crucible, and then the corundum crucib...

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Abstract

A method for preparing photocatalyst Cu2O based on recovering copper cutting waste belongs to that technical field of molten salt solvation reaction and photocatalysis. The method fully oxidizes the copper cutting waste, removes the residual oil stains on the surface of the copper cutting waste and obtains copper oxide, melts the molten salt, adds the prepared copper oxide under argon gas atmosphere, stays at constant temperature for a period of time, drops the temperature, dissolves the molten salt with water, centrifuges, repeatedly cleans and then dries to obtain the nanometer Cu2O photocatalyst. Nano-Cu2O photocatalyst is used to degrade organic dyes. It has a good degradation effect on methyl orange or methylene blue. Cu2O photocatalyst prepared from copper cutting waste by adopting that method has the advantages of low cost, simple process flow, high efficiency and environmental friendliness, and only CO2 and O2 are produced in the process of photodegradation of organic dyes, and no pollution is caused to the environment.

Description

technical field [0001] The invention relates to the field of molten salt solvation reaction and photocatalysis technology, in particular to a photocatalyst Cu based on the recycling of copper cutting waste. 2 O's method. Background technique [0002] During the wet processing of textiles in the textile industry, large quantities of dyestuffs are produced worldwide. (over 700,000 tons per year in the 1980s) Direct discharge of untreated dyestuffs into oceans or rivers has caused serious environmental pollution, especially in underdeveloped and developing countries. Photocatalysis, as a green chemical technology, has shown good results in the removal of dyes in wastewater due to its good treatment effect. Photocatalytic treatment of dye-containing wastewater degrades dye molecules into CO 2 and H 2 O, does not generate sludge and reduces odor. Currently, photocatalysts based on ZrO 2 、TiO 2 However, these transition metal oxides have major disadvantages such as high cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B82Y40/00B01J23/72C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01G3/02B01J23/72C02F1/30B82Y40/00C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2305/10B01J35/39
Inventor 尹华意周风银赵海佳谢宏伟
Owner NORTHEASTERN UNIV
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