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Preparing method of zinc oxide nano fiber film used as photocatalyst

A technology of zinc oxide nanometer and photocatalyst, which is applied in the field of nanomaterials and can solve problems such as nanofibers that have not been tried or involved

Inactive Publication Date: 2007-08-08
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing studies only reported the preparation and structure of ZnO nanofibers, but the application of ZnO nanofibers, including the application of photocatalysts, has not been involved.
Moreover, how to prepare nanofibers with a diameter less than 100nm has not been attempted

Method used

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  • Preparing method of zinc oxide nano fiber film used as photocatalyst
  • Preparing method of zinc oxide nano fiber film used as photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Dissolve 20 grams of cellulose acetate and 5 grams of zinc acetate in 75 grams of dimethylformamide / acetone mixed solvent prepared in a ratio of 1:1 (v / v).

[0037] 2. Prepare a zinc acetate / cellulose acetate composite nanofiber membrane with a diameter of 110-80 nm through electrospinning equipment with a power supply voltage of 10 kV.

[0038]3. Put the zinc acetate / cellulose acetate composite nanofiber into 0.1N NaOH aqueous solution to hydrolyze for 12 hours, then wash and dry. The dried composite nanofiber membrane was calcined in air at 500° C. for 5 hours to obtain a ZnO nanofiber membrane with a diameter of about 80 nanometers.

[0039] 5. Put 5 mg of ZnO nanofibers into 10 ml of 47 ppm dye acid fuchsin solution, and magnetically stir for 30 min under sunlight. The dye concentration in the assay solution was 0.98 ppm.

Embodiment 2

[0041] 1. Dissolve 15 grams of cellulose acetate and 8 grams of zinc acetate in 77 grams of dimethylformamide / acetone mixed solvent prepared in a ratio of 3:1 (v / v).

[0042] 2. Through the electrospinning equipment, the power supply voltage is adjusted to 22kV, and the zinc acetate / cellulose acetate composite nanofiber membrane with a diameter of 100-150nm is prepared.

[0043] 3. Put the zinc acetate / cellulose acetate composite nanofiber into 0.1N NaOH aqueous solution to hydrolyze for 24 hours, then wash and dry. The dried composite nanofibers were calcined in air at 470° C. for 6 hours to obtain a ZnO nanofiber film with a diameter of about 50 nm.

[0044] 5. Put 5 mg of ZnO nanofibers into 10 ml of 45 ppm dye amino black B solution, and magnetically stir for 30 min under sunlight. The dye concentration in the assay solution was 4.7 ppm.

Embodiment 3

[0046] 1. Dissolve 15 grams of cellulose acetate and 10 grams of zinc acetate in 75 grams of dimethylformamide / acetone mixed solvent prepared in a ratio of 1:2 (v / v).

[0047] 2. Through electrospinning equipment, the power supply voltage is 15kV, and the zinc acetate / cellulose acetate composite nanofiber membrane with a diameter of 110-180nm is prepared.

[0048] 3. Put the zinc acetate / cellulose acetate composite nanofiber into 0.1N NaOH aqueous solution to hydrolyze for 18 hours, then wash and dry. The dried composite nanofiber membrane was calcined in air at 550° C. for 7 hours to obtain a ZnO nanofiber membrane with a diameter of about 80 nanometers.

[0049] 5. Put 5 mg of ZnO nanofibers into 10 ml of 47 ppm dye acid fuchsin solution, and magnetically stir for 30 min under sunlight. The dye concentration in the assay solution was 2.3 ppm.

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Abstract

The invention discloses a making method of zinc oxide nanometer fiber as optical catalyst, which comprises the following steps: adopting zinc acetate as primer and fiber acetate as carrier; using organic solvent dimethyl formamide / acetone as co-solvent; adopting electrostatic spinning technique to make composite nanometer fiber film of zinc acetate / fiber acetate; dissolving in the 0.1N NaOH solution; washing; drying; sintering; obtaining the ZnO nanometer fiber film with diameter less than 100nm.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to a method for preparing a zinc oxide nanofiber film that can be used as a photocatalyst. Background technique [0002] Zinc oxide (ZnO) is a wide bandgap semiconductor material with a bandgap width of 3.2eV. As the ZnO particle size decreases, its forbidden band width increases gradually. For example, the forbidden band width of 10nm zinc oxide particles is 4.5eV, and it has a very strong absorption capacity for ultraviolet light with a wavelength of 280-400nm. Based on its special properties, zinc oxide is not only widely used in solar cells, gas detectors, piezoelectric devices, ceramic materials and coatings, but also as a photocatalytic material to degrade organic pollutants in sewage. Nano-zinc oxide (ZnO) is excited to generate high-energy charges-electrons-holes under the irradiation of ultraviolet and visible light, and the holes decompose the water adsorbed on the sur...

Claims

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Application Information

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IPC IPC(8): B01J23/06B01J31/06B01J31/26C02F1/30C02F1/32
CPCY02W10/37
Inventor 刘海清杨锦霞梁建鹤黄应兴唐春怡
Owner FUJIAN NORMAL UNIV
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