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ZnO-CdS composite material and preparation method and application of ZnO-CdS composite material

A composite material, zno-cds technology, applied in the direction of chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of limiting the use of general light sources and the inability to effectively improve the light source utilization rate. The photodegradation ability of chemical substances, etc. problem, achieve the effect of increasing the light absorption range, facilitating separation, and improving utilization

Active Publication Date: 2017-05-10
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wide bandgap of ZnO only allows it to absorb ultraviolet light, which limits the utilization of general light sources.
The current ZnO materials cannot effectively improve the utilization rate of light sources and the photodegradation ability of chemical substances

Method used

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  • ZnO-CdS composite material and preparation method and application of ZnO-CdS composite material
  • ZnO-CdS composite material and preparation method and application of ZnO-CdS composite material
  • ZnO-CdS composite material and preparation method and application of ZnO-CdS composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1.4875g of Zn(NO 3 ) 2 ·6H 2 O dissolved in 20 mL deionized water, 0.7408 g NH 4 Dissolve F in 10mL deionized water, and dissolve 0.8002g NaOH in 10mL deionized water. By adding Zn(NO 3 ) 2 ·6H 2 O deionized water and NH 4 F deionized aqueous solution was mixed to obtain a precursor solution, and then NaOH deionized aqueous solution was added dropwise. When a small amount of NaOH deionized water solution was added dropwise, a white precipitate formed immediately, and after further adding all the remaining NaOH deionized water solution dropwise, part of it dissolved and the solution became translucent. It was then clouded for 10 hours at 50°C with constant stirring. The white precipitate was harvested by centrifugation, washed with deionized water and ethanol, and finally dried at 60°C overnight to obtain ZnO nanoparticles;

[0033] 0.2364g Cd(NO 3 ) 2 4H 2 O and 0.0761 g of thiourea were dissolved in 100 mL of deionized water and mixed with 40 mg of ZnO nano...

Embodiment 2

[0047] The prepared ZnO-CdS was used to degrade rhodamine B

[0048] Take 100ml of rhodamine B solution with a concentration of 8μg / ml in a container, add 10mg of ZnO-CdS and stir in the dark for 1 hour. Then irradiate under a 300W xenon lamp, start sampling from 0 minutes, take samples every 5 minutes, take 8 samples, then take samples every 10 minutes, take two samples, and finally take samples every 20 minutes, take three samples.

[0049] The samples taken were subjected to ultraviolet detection in turn, and the results were as follows: Figure 5 shown.

Embodiment 3

[0051] The prepared ZnO-CdS was used to degrade methylene blue

[0052] Take 100ml of methylene blue solution with a concentration of 8μg / ml in a container, add 10mg of ZnO-CdS and stir in the dark for 1 hour. Then irradiate under a 300W xenon lamp, start sampling from 0 minutes, take samples every 5 minutes, take 8 samples, then take samples every 10 minutes, take two samples, and finally take samples every 20 minutes, take three samples.

[0053] The samples taken were subjected to ultraviolet detection in turn, and the results were as follows: Image 6 shown.

[0054] pass Figure 5 with Image 6 It can be observed that the characteristic peaks of rhodamine B and methylene blue have both decreased significantly, which proves that ZnO-CdS nanomaterials have a significant degradation effect on rhodamine B and methylene blue under light conditions, so the material has enhanced light Degradability.

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Abstract

The invention belongs to the technical field of a nanometer new material, and specifically relates to a ZnO-CdS composite material and a preparation method and application of the ZnO-CdS composite material. The composite material is made by depositing CdS nanoparticles on surfaces of ZnO nanoparticles. The preparation method comprises: mixing a deionized water solution of Zn(NO3)2.6H2O with a deionized water solution of NH4F, dropwise adding a deionized water solution of NaOH to the mixed solution till the obtained solution is semitransparent, performing centrifugation to obtain white precipitation and performing washing and drying to obtain ZnO nanoparticles; and adding the ZnO nanoparticles to a deionized water solution with Cd(NO3)2.4H2O and thiourea dissolved to form a suspension liquid, and performing deposition and centrifugation to obtain a ZnO-CdS product. The composite material is excellent in photodegradation capability of rhodamine B and methylene blue.

Description

technical field [0001] The invention belongs to the technical field of new nanometer materials, and in particular relates to a ZnO-CdS composite material and a preparation method and application thereof. Background technique [0002] ZnO is a wide-bandgap semiconductor material with high exciton binding energy. It has the advantages of non-toxicity, good biocompatibility, high electrochemical activity and strong electron transport ability. In recent years, it has been widely used in solar cells, sensors, gas sensors and other fields. But the wide bandgap of ZnO only allows it to absorb ultraviolet light, which limits the utilization of general light sources. The current ZnO materials cannot effectively improve the utilization rate of light sources and the photodegradation ability of chemical substances. Contents of the invention [0003] The purpose of the present invention is to provide a ZnO-CdS composite material with excellent photodegradation ability to pollutants, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J37/03
CPCB01J27/04B01J37/035B01J35/39
Inventor 渠凤丽杜蕙同孔荣梅谭青青
Owner QUFU NORMAL UNIV
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