Composite microsphere with carbon sphere nucleus and CuO shell and preparation method and application thereof

A technology of composite microspheres and carbon spheres, applied in the field of composite materials, can solve the problems of limited types of organic substances, unfavorable industrial application, unfavorable industrialization promotion, etc., and achieves good visible light absorption characteristics, good degradation effect, and cheap instruments and equipment.

Active Publication Date: 2015-06-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, at present, the methods for treating organic wastewater still have the following problems: (1) The preparation process is complex and the post-treatment procedures are numerous, which is not conducive to industrial application; (2) High energy consumption is not conducive to energy conservation; (3) Treatment The types of organic matter are limited and the scope of application is narrow; (4) The cost of the treatment process is high, which is not conducive to industrialization

Method used

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  • Composite microsphere with carbon sphere nucleus and CuO shell and preparation method and application thereof
  • Composite microsphere with carbon sphere nucleus and CuO shell and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 120mg of potato starch in 120mL of distilled water, dissolve at 100°C for 2h with stirring, and cool to room temperature naturally, then pour the obtained starch solution into an autoclave, perform hydrothermal synthesis at 180°C for 12h, and cool to room temperature naturally, The obtained carbon spheres have a diameter of 200nm, add 0.1793g of copper nitrate, stir evenly at room temperature, further conduct a hydrothermal reaction at 180°C for 10h, cool to room temperature naturally, centrifuge, wash, and dry at 80°C for 10h to obtain carbon spheres with a diameter of 300nm. Carbon sphere CuO core-shell composite microsphere, the shell thickness is about 50nm.

[0031] Weigh 10 mg of carbon sphere CuO core-shell composite microspheres, add 10 mL of methyl orange solution with a concentration of 10 mg / L, stir in a dark box for 30 min to reach adsorption equilibrium, and then irradiate under simulated sunlight for 6 h, pass UV Visible spectrophotometer measured...

Embodiment 2

[0033] Dissolve 1200mg of potato starch in 120mL of distilled water, dissolve at 100°C for 5h, cool naturally to room temperature, then pour the obtained starch solution into an autoclave, carry out hydrothermal synthesis at 170°C for 16h, and naturally cool to room temperature, the obtained carbon The diameter of the ball is 280nm, add 1.3424g of copper nitrate, stir evenly at room temperature, further react in hydrothermal reaction at 180°C for 24h, naturally cool to room temperature, centrifuge, wash, and dry at 100°C for 8h to obtain carbon spheres with a diameter of 330nm CuO core-shell composite microspheres, the shell thickness is about 25nm.

[0034] Weigh 10 mg of carbon sphere CuO core-shell composite microspheres, add 10 mL of methyl orange solution with a concentration of 10 mg / L, stir in a dark box for 30 min to reach adsorption equilibrium, and then irradiate under simulated sunlight for 6 h, pass UV Visible spectrophotometer measured the degradation rate of meth...

Embodiment 3

[0036] Dissolve 1200mg konjac starch in 150mL distilled water, dissolve at room temperature for 24h, then pour the obtained starch solution into an autoclave, carry out hydrothermal synthesis at 120°C for 48h, and cool naturally to room temperature, the diameter of the obtained carbon spheres is 880nm , add 7.5120g of copper nitrate, stir evenly at room temperature, further hydrothermally react at 200°C for 24h, naturally cool to room temperature, centrifuge, wash, and dry at 60°C for 24h to obtain a carbon sphere CuO core-shell type with a diameter of 1000nm Composite microspheres, the shell thickness is about 60nm.

[0037] Weigh 10 mg of carbon sphere CuO core-shell composite microspheres, add 10 mL of methylene blue solution with a concentration of 10 mg / L, stir in a dark box for 30 min to reach adsorption equilibrium, then irradiate under simulated sunlight for 10 h, and pass through the ultraviolet Visible spectrophotometer measured the degradation rate of methylene blue...

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Abstract

The invention provides a composite microsphere with a carbon sphere nucleus and a CuO shell. A carbon sphere is used as the nucleus, a shell layer consisting of CuO nanometer particles is used as the shell layer of the composite microsphere, the shell thickness is not smaller than 5 nm, and the nucleus diameter is smaller than 300 nm. The diameter of the prepared composite microsphere with the carbon sphere nucleus and the CuO shell is 200 nm to 1 micron. The carbon sphere is used as the nucleus. First, natural starch is dissolved, and then, a starch solution is poured in an autoclave to carry out hydro-thermal synthesis, thereby forming a polyhydroxy carbon sphere. Finally, a copper source is directly added to the water solution of the polyhydroxy carbon sphere to further carry out hydro-thermal synthesis, a copper oxide precursor reacts with the hydroxy of the carbon sphere, and the composite microsphere with the carbon sphere nucleus and the CuO shell is finally obtained through the subsequent processing of centrifugal, washing and drying. According to the obtained method, the carbon sphere is used as the nucleus, CuO is coated on the surface of the nucleus to form the shell layer, and the particle size is uniformly distributed and is at a submicron grade, so that the CuO photocatalyst performance can be improved. The method has great significance in a water treatment method for organic pollutants in purified water.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and particularly relates to a kind of natural starch as a raw material, which is prepared by hydrothermal synthesis to obtain carbon spheres with uniform particle size, and then adding copper source for further hydrothermal synthesis to obtain carbon spheres that can be used to treat organic pollutants in water A preparation method of CuO core-shell composite microspheres. Background technique [0002] The Bohai Sea is the only semi-enclosed inland sea in my country. It is surrounded by Tianjin, Hebei, Shandong, and Liaoning. , thereby causing adverse effects on the marine ecological environment. The huge pressure of land-based sewage discharge is the main reason for the deterioration of the Bohai Sea environment. The main pollutants discharged from land-based sources are chemical oxygen demand, petroleum, organic pollutants, inorganic nitrogen and phosphate, etc. In particular, it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J35/08C02F1/30C02F101/38
CPCY02W10/37
Inventor 李银辉陈建新苏敏卢爱党韩健
Owner HEBEI UNIV OF TECH
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