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Preparation method and application of zinc oxide visible-light-induced photocatalyst sensitized by squarylium cyanine

A dye sensitization, zinc oxide technology, applied in the field of photocatalysis, can solve problems such as no substantial breakthrough, and achieve the effects of easy control, simple process and high photocatalytic activity

Inactive Publication Date: 2013-05-01
常州浩瀚万康纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above problems, many studies have tried to improve the photocatalytic efficiency by doping transition metal ions, noble metal deposition, semiconductor compounding, etc., and to red-shift the wavelength of the absorption threshold of visible light. a substantial breakthrough

Method used

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  • Preparation method and application of zinc oxide visible-light-induced photocatalyst sensitized by squarylium cyanine
  • Preparation method and application of zinc oxide visible-light-induced photocatalyst sensitized by squarylium cyanine
  • Preparation method and application of zinc oxide visible-light-induced photocatalyst sensitized by squarylium cyanine

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Experimental program
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Embodiment 1

[0027] Weigh Zn(Ac) with a mass ratio of 1:2 2 .2H 2 O and glucose were dissolved in deionized water and ultrasonically formed to form a clear solution. After the solution was transferred to the liner of a polytetrafluoroethylene autoclave, the hydrothermal reaction was carried out at 180°C for 12 hours. After cooling to room temperature, the obtained black powder was used separately. Ionized water and absolute ethanol were subjected to several centrifugal washings, and then dried at 60°C to obtain a composite precursor of zinc oxide and carbon, which was then calcined in a muffle furnace at 600°C for 3 hours to obtain zinc oxide microparticles. ball. The scanning electron microscope and transmission electron microscope pictures of the prepared zinc oxide microspheres are as follows: figure 1 with figure 2 shown. It can be seen from the figure that zinc oxide has good dispersibility.

[0028] The zinc oxide microspheres obtained above were mixed with 2,3,3-trimethyl-3H i...

Embodiment 2

[0030] Weigh Zn(Ac) with a mass ratio of 1:3 2 .2H 2 O and glucose were dissolved in deionized water and ultrasonically formed to form a clear solution. After the solution was transferred to a polytetrafluoroethylene autoclave liner, the hydrothermal reaction was carried out at 140°C for 24 hours. After cooling to room temperature, the obtained black powder was used in Ionized water and absolute ethanol were subjected to several centrifugal washings, and then dried at 60°C to obtain a composite precursor of zinc oxide and carbon, which was then calcined in a muffle furnace at 400°C for 3 hours to obtain zinc oxide ball.

[0031] The zinc oxide microspheres obtained above were mixed with 2,3,3-trimethyl-3-ethylindole substituted squarylium dye [R 1 for C 2 h 5 , R 2 for C(CH 3 )] and 60ml of methanol were added to a single-necked flask, wherein the mass ratio of nano-zinc oxide to 2,3,3-trimethyl-3-ethylindole substituted squarylium dye was 100:5, at a temperature of 30°C...

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Abstract

The invention relates to a preparation method of a zinc oxide visible-light-induced photocatalyst sensitized by squarylium cyanine. The preparation method comprises the following steps: dissolving Zn(Ac)22H2O and glucose into deionized water; carrying out ultrasonic processing to form a settled solution; after transferring the solution into a liner of a polytetrafluoroethylene autoclave, performing hydrothermal reaction for 12 to 24 hours at a temperature of 140 to 180 DEG C; after cooling to room temperature, carrying out centrifugal washing on the obtained black powder respectively with the deionized water and absolute ethyl alcohol; drying at a temperature of 60 DEG C to obtain a zinc oxide and carbon composite precursor; placing the precursor into a muffle furnace to calcine for 3 hours at a temperature of 400 to 600 DEG C, so as to obtain zinc oxide microspheres; mixing the zinc oxide microspheres and the squarylium cyanine as well as an organic solvent; at a temperature of 30 to 60 DEG C, carrying out ultrasonic processing on the mixture for 0.5 to 2 hours; then removing the organic solvent under the condition of pressure reduction; and finally, drying the obtained solid at a temperature of 60 DEG C. The zinc oxide visible-light-induced photocatalyst sensitized by the squarylium cyanine can be used for photocatalysis processing on organic pollutants in air, soil and sewage.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of a squaraine dye-sensitized zinc oxide visible light catalyst. Background technique [0002] With the rapid development of industry, the problem of environmental pollution is becoming more and more serious, which makes the ecological environment worse. Governments of various countries regard environmental pollution control as a top priority, and have invested huge sums of money in research on environmental pollution control technologies and environmental purification materials. The photocatalytic technology developed in recent years is a green environmental purification technology. Using photocatalysts, organic pollutants can be completely mineralized under ultraviolet or visible light irradiation. Therefore, photocatalytic technology has received widespread attention in environmental governance, especially the research a...

Claims

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Application Information

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IPC IPC(8): B01J31/26C02F1/30C02F101/38
CPCY02W10/37
Inventor 范宏伟李忠玉房永玲
Owner 常州浩瀚万康纳米材料有限公司
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