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Preparation method of cellulose-based core-shell CdS/ZnO (cadmium-sulfur/zinc oxide) photocatalyst

A core-shell structure, cellulose-based technology, applied in the field of preparation of cellulose-based core-shell structure CdS/ZnO photocatalytic materials, can solve the problems of difficult industrialization, complicated process, high production cost, etc., to achieve broadened spectral response range, The effect of prolonging the exciton decay time and the precise and controllable synthesis process

Inactive Publication Date: 2016-08-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method uses natural non-toxic cotton cellulose as a template, there are still problems such as complex process, high production cost, and difficulty in industrialization.

Method used

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  • Preparation method of cellulose-based core-shell CdS/ZnO (cadmium-sulfur/zinc oxide) photocatalyst
  • Preparation method of cellulose-based core-shell CdS/ZnO (cadmium-sulfur/zinc oxide) photocatalyst
  • Preparation method of cellulose-based core-shell CdS/ZnO (cadmium-sulfur/zinc oxide) photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 2.66 g of cadmium acetate and mix it with distilled water, stir until completely dissolved, then take 2 g of cotton washed and dried with absolute ethanol and immerse it in the cadmium acetate solution for 2 hours, so that the cotton is soaked in the solution, and then put in Dry in a constant temperature drying oven at 40°C for 2 hours; then weigh 4.80 g of sodium sulfide and mix it with distilled water, and stir until it is completely dissolved; add the above-mentioned dried cotton and prepared sodium sulfide solution into the hydrothermal reaction kettle, tighten the Put the reaction kettle into a constant temperature drying oven, the reaction temperature is 100 °C, and react for 14 hours; after the reaction is completed, take it out and filter it with a Buchner funnel, wash the filter residue with distilled water and absolute ethanol for 3 times, and then put it in a constant temperature drying box at 20 °C After drying for 3 hours, cellulose-based cadmium sulf...

Embodiment 2

[0029]Weigh 5.13 g of cadmium sulfate and mix it with distilled water, stir until completely dissolved, then take 5 g of cotton washed and dried with absolute ethanol and immerse in the cadmium sulfate solution for 2 hours to make the cotton soaked in the solution, and then put it in a constant temperature Dry in a drying oven at 50 °C for 3 hours; then weigh 1.52 g of thiourea and mix it with distilled water, stir until completely dissolved; add the above-mentioned dried cotton and prepared thiourea solution into the hydrothermal reaction kettle, and tighten the hydrothermal reaction The kettle was placed in a constant temperature drying oven, the reaction temperature was 120°C, and the reaction was carried out for 13 hours. After the reaction is complete, take it out and filter it with Buchner funnel, wash it with distilled water and absolute ethanol three times respectively, then put it in a constant temperature drying oven at 25°C and dry it for 3 hours to obtain cellulose-...

Embodiment 3

[0031] Weigh 9.24 g of cadmium nitrate and mix it with distilled water, stir until it is completely dissolved, then take 9 g of cotton washed and dried with absolute ethanol and soak it in the cadmium nitrate solution for 2 hours, so that the cotton is soaked in the solution, and then put it in a constant temperature Dry in a drying oven at 60°C for 4 hours; then weigh 6.75 g of thioacetamide and mix it with distilled water, and stir until completely dissolved. Add the above-mentioned dried cotton and the prepared thioacetamide solution into the hydrothermal reaction kettle, tighten the hydrothermal reaction kettle and put it into a constant temperature drying oven at a reaction temperature of 130° C. for 14 hours. After the reaction is completed, take it out and filter it with a Buchner funnel, wash it with distilled water and absolute ethanol three times respectively, then put it in a constant temperature drying oven at 30°C and dry it for 3 hours to obtain cellulose-based ca...

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Abstract

The invention discloses a preparation method of a cellulose-based core-shell CdS / ZnO (cadmium-sulfur / zinc oxide) photocatalyst. The preparation method comprises the following steps of using a renewable resource of cotton cellulose as a template agent, selecting proper cadmium source / sulfur source reagents, and adopting a hydrothermal synthesis method to prepare the cellulose-based CdS; mixing with an inorganic zinc source solution, drying, and performing microwave high-temperature calcining under the nitrogen atmosphere, so as to obtain the cellulose-based core-shell CdS / ZnO photocatalyst. The cellulose-based core-shell CdS / ZnO photocatalyst has the advantages that the shape is controllable, the photocatalytic and recycling properties are good, and the photocatalytic activity under visible light is obviously higher than the photocatalytic activity of cellulose-based CdS / ZnO; the preparation method has certain theoretical and realistic meaning on the synthesis of heterogeneous core-shell materials and the purification of dye wastewater.

Description

technical field [0001] The invention relates to a preparation method of a cellulose-based core-shell structure CdS / ZnO photocatalytic material. By utilizing the good physical adsorption performance of cellulose and the developed pore structure, the visible light response range of the composite material is broadened, and the recombination of carriers is suppressed. Thereby improving the photocatalytic performance of the semiconductor photocatalyst, belonging to the field of semiconductor composite photocatalytic materials. Background technique [0002] Micro / nano ZnO has excellent photoluminescent properties and good photocatalytic properties, and it has great application value in solving environmental and energy problems. At present, ZnO semiconductor photocatalytic materials have been applied to treat dye wastewater. However, single ZnO materials have problems such as poor dispersion, small specific surface area, strong photocorrosion, and easy loss in aqueous solution whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C02F1/30
CPCC02F1/30B01J27/04B01J37/082B01J37/10B01J37/346C02F2101/308C02F2305/10B01J35/396B01J35/39Y02W10/37
Inventor 曲雯雯胡琼张家麟朱义张利波彭金辉
Owner KUNMING UNIV OF SCI & TECH
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