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Zinc oxide nanorod ternary composite material as well as preparation method and application thereof

A technology of zinc oxide nanorods and composite materials, which is applied in the field of zinc oxide nanorod ternary composite materials and its preparation, can solve the problems of limited wastewater treatment effect, achieve good photocatalytic effect, good photoresponse effect, and multiple active sites point effect

Pending Publication Date: 2022-01-14
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a zinc oxide nanorod ternary composite material in order to overcome the problem that the existing tetracycline hydrochloride-containing wastewater has a limited treatment effect

Method used

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  • Zinc oxide nanorod ternary composite material as well as preparation method and application thereof
  • Zinc oxide nanorod ternary composite material as well as preparation method and application thereof
  • Zinc oxide nanorod ternary composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 graphene oxide (hereinafter referred to as RGO) preparation

[0033] RGO was synthesized by a modified Hummer method. The method is to mix 360ml of concentrated H 2 SO 4 and 40ml concentrated H 3 PO 4 With proper mixing, 3 g of graphite powder was slowly added to the solution and stirring was continued for 3 h. Subsequently, 18 g of potassium permanganate was appropriately ground and slowly added to the solution, and the solution was continuously stirred for 12 h under the condition of a magnetic stirrer at 50° C. During this reaction, the solution color changed to dark purple, green, and then dark brown. Pour the dark brown solution into a beaker with a capacity of 400ml and keep it with a popsicle, add 3ml of H to the solution 2 o 2 And stir for 2h. The residual particles were then washed three times with HCl and several times with ethanol and distilled water. Finally, the particles were dried in a hot air oven at 60 °C for 48 h to obtain RGO.

...

Embodiment 2

[0035] Embodiment 2 biochar preparation

[0036] The white spongy part of pomelo peel was separated, and the remaining pomelo peel was dried at 80°C for 72 hours, ground into powder and passed through a 100-mesh sieve. Afterwards, the powder was carbonized in a quartz tube furnace at 400 °C under a nitrogen atmosphere. The carbonized product was immersed in KOH solution in a nickel crucible for 1 h, then activated at 400 °C for 2 h, and slowly pyrolyzed at 800 °C for 2 h. After cooling to room temperature, the final product was thoroughly washed with 0.1 mol / L HCl and deionized water, and finally dried at 80°C for 24 hours, and ground to obtain biochar powder for future use.

Embodiment 3

[0037] Example 3 Preparation of ZnO nanorod / biochar composite material

[0038] Disperse 0.115g (10%) of the biochar prepared in Example 2 in 30ml of ethanol, sonicate for 40min, then add 1.15g of zinc acetate dihydrate, add 3g of NaOH and 7.5ml of PEG 400 to the solution and sonicate for 40min. The solution was then transferred to a polytetrafluoroethylene-lined stainless steel autoclave, heated in an oven at 120 °C for 12 h, and cooled to room temperature naturally. The product ZnO / biochar nanocomposites were washed several times with distilled water and ethanol, and dried at 60 °C for 48 h for subsequent studies.

[0039] Using the biochar prepared in Example 2 of 0.0575g (5wt.%), 0.1150g (10wt.%) and 0.1725g (15wt.%) respectively, ZnO / biochar nanocomposites were prepared according to the above method, and the samples were respectively called ZB 5 、ZB 10 and ZB 15 .

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Abstract

The invention relates to a zinc oxide nanorod ternary composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: obtaining biochar: removing spongy parts of shaddock peels, drying the shaddock peels, grinding the shaddock peels into powder, sieving the powder, and carbonizing the powder in a protective atmosphere; then immersing the carbonized product into an alkaline solution, heating, cooling, washing and drying to obtain biochar; and preparing the composite material: dispersing the biochar in a solvent, adding zinc acetate, an alkaline reagent, polyethylene glycol and graphene oxide, uniformly mixing, loading into a high-pressure reaction kettle, heating to react, cooling to room temperature, filtering, washing and collecting a solid product. The zinc oxide nanorod ternary composite material disclosed by the invention has a good photocatalytic effect on tetracycline hydrochloride, the tetracycline degradation efficiency reaches 99.24% after the tetracycline nanorod ternary composite material is mixed with a tetracycline hydrochloride solution, dark adsorption is performed for 40 minutes, and irradiation is performed for 80 minutes under a 75W mercury lamp, so that a new way and a new method are provided for tetracycline wastewater degradation.

Description

technical field [0001] The invention relates to the treatment technology of biochar functional materials and antibiotics, in particular to a zinc oxide nanorod ternary composite material and its preparation method and application. Background technique [0002] Antibiotics are secondary metabolites produced during biological life. They are widely used to treat human and animal diseases because they interfere with the development of living cells. China is the first country to use tetracycline, among which tetracycline hydrochloride (TC-H) is the most commonly used antibiotic. TC-H in water is difficult to decompose naturally and is harmful to human health. Additionally, it will increase bacterial resistance and greatly reduce the effects of tetracyclines. Therefore, effective tetracycline administration has been an urgent problem. Advanced oxidation technologies have made remarkable progress in antibiotic wastewater treatment in recent decades. Photocatalytic technology h...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J35/02B01J35/10B01J37/10B01J37/34C02F1/30C02F101/34C02F101/38
CPCB01J23/06B01J37/10B01J37/343C02F1/30C02F2101/34C02F2101/345C02F2101/38C02F2305/10B01J35/40B01J35/61B01J35/39
Inventor 金月正傅海燕王雅楠林婷吴义诚龙绛雪刘征
Owner XIAMEN UNIV OF TECH
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