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Green synthesis method and application of steamed bread-structured nano-Cu2O

A technology of green synthesis and steamed bread, applied in the direction of nanotechnology, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of harsh reaction conditions, uncontrollable reactions, toxic and side effects, etc., and achieve low equipment requirements, low cost, and good circulation performance effect

Inactive Publication Date: 2018-06-08
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of the current liquid-phase reduction method are as follows: 1. Reductants with toxic and side effects, such as hydrazine hydrate, sodium borohydride, N,N-dimethylformamide, formaldehyde and hydroxylamine hydrochloride, etc.; 2. The non-aqueous solution system of the reaction system, Such as the introduction of oleic acid, oleic acid amine, NaOH catalyst, ammonia water catalyst, etc., the Cu 2 The catalytic adsorption and other properties of O itself have certain side effects; 3. Most reaction systems have harsh reaction conditions, such as reaction systems generally require higher temperature or / and reduction atmosphere, etc., making the reaction difficult to control

Method used

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  • Green synthesis method and application of steamed bread-structured nano-Cu2O
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  • Green synthesis method and application of steamed bread-structured nano-Cu2O

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Nano Cu 2 O powder experiment (investigating the amount of reducing agent): Weigh four parts of 1g copper acetate, place them in 200mL beakers respectively, and add 100mL ultrapure water, after fully dissolving, then add 2, 3, 4, 5g vitamin C respectively, in Magnetic stirring at 150rpm at room temperature, reaction for 1min, centrifugation of the suspension at 2000rpm, washing with deionized water for 3 times, vacuum drying at 50°C for 4h; organic wastewater purification experiment: Weigh 100mg Cu 2 O nano-powder (No.1-1, No.1-2, No.1-3, No.1-4), was added to 500mL of organic wastewater from a leather factory, and the purification rate was tested after 48 hours of purification (see Table 1).

[0025] Table 1, PVP molecular weight and Cu 2 The relationship between the particle size of O nanoparticles and the diameter of steamed bread

[0026]

Embodiment 2

[0028] Weigh 1g of copper acetate and 3g of PVP (molecular weight 5000, 10000, 15000, 30000) respectively, put them in a 200mL beaker, add 100mL of ultrapure water, after fully dissolving, add 3g of ascorbic acid, and stir magnetically at 150rpm at room temperature , and reacted for 1 min, the suspension was centrifuged at 3000 rpm, washed 3 times with deionized water, and dried in vacuum at 50°C for 4 h. PVP molecular weight and Cu 2 The relationship between the particle size of O nanoparticles and the diameter of steamed bread is shown in Table 2.

[0029] Table 2, PVP molecular weight and Cu 2 The relationship between the particle size of O nanoparticles and the diameter of steamed bread

[0030]

[0031]

Embodiment 3

[0033] Weigh 1g of copper acetate and 3g of PVP (molecular weight 10000), put in a 200mL beaker, add 100mL of ultrapure water, after fully dissolved, add 4g of ascorbic acid, stir magnetically at room temperature and 150rpm, react for 3min, and dissolve the suspension Centrifuge at 1500rpm, wash with deionized water three times, and dry under vacuum at 50°C for 4h.

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Abstract

The invention discloses a green synthesis method and an application of steamed bread-structured nano-Cu2O, and belongs to the fields of preparation technologies and applications of nano-materials. Themethod comprises the following steps: adding proper amounts of a reducing agent and a protection agent to copper acetate used as a main copper source raw material, performing a reaction at room temperature for 0.5-2 min, performing centrifugal separation, washing the obtained reaction product 3-5 times, and carrying out vacuum drying at 30-60 DEG C for 4 h to obtain an ideal nano-Cu2O secondary layered steamed bread-shaped structure. The method is performed in a room temperature and aqueous solution system, and has the advantages of simplicity, easiness in control, high yield and high purityof the target product, energy saving and environmental protection. The prepared steamed bread-structured nano-Cu2O has the advantages of strong recyclability (repeatedly used 4 times or more, and thepurification rate does not significantly decrease and is 85% or more) and excellent purification (adsorption and degradation) capability when used as an industrial organic wastewater purification agent, and the purification rate reaches 90% or more, and exceeds that of standard active carbon under same experiment conditions.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation technology and application, in particular to a kind of green synthetic steamed bread structure nano-Cu 2 O's method and its application to industrial wastewater treatment. Background technique [0002] The biggest problem that mankind is facing in the 21st century is that the environment in which they live and survive is severely challenged, especially the problem of water pollution. The current main method of water purification is membrane separation technology, but the disadvantages are expensive equipment, treatment process, large energy consumption and large site requirements, so finding a reasonable alternative method has become a current research hotspot, such as photocatalysis in chemical methods The method makes it possible to release harmful substances in water from the water through adsorption, sedimentation, separation or degradation. [0003] Nano-Cu 2 The particle size of O ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B82Y40/00C02F1/28B01J20/06B01J20/30B01J20/28C02F101/30
CPCC01G3/02B01J20/06B01J20/28007B82Y40/00C01P2002/72C01P2004/03C01P2004/64C02F1/281C02F2101/30C02F2305/08
Inventor 曹发斌武军胡启利王平申星梅丁祥吴照金李辽沙刘伟明武杏荣
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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