Composite photocatalytic antibacterial material and preparation method thereof

A technology of composite photocatalytic and antibacterial materials, which is applied in the field of composite photocatalytic antibacterial materials and their preparation to achieve the effect of avoiding low yield

Active Publication Date: 2016-07-20
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis of metal-doped zinc oxide-coated rare earth-doped fluoride core-shell structure by microwave-assisted hydrothermal synthesis

Method used

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  • Composite photocatalytic antibacterial material and preparation method thereof
  • Composite photocatalytic antibacterial material and preparation method thereof
  • Composite photocatalytic antibacterial material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] 3. Deposition of Mn-doped ZnO on NaYF 4 : Yb,ErSiO 2 A core-shell structure composite antibacterial material is formed on the surface, and its preparation method comprises the following steps:

[0037] (1) NaYF 4 :Yb,ErSiO 2 Nanoparticles with core-shell structure are ultrasonically dispersed in diethylene glycol to obtain a suspension system;

[0038] (2) Add zinc salt and manganese salt to the above suspension system in a certain proportion, stir at room temperature for 1 hour, then raise the temperature to 180°C, and reflux for 1-6 hours;

[0039] (3) The solid product was centrifuged and calcined at 500°C for 2 hours to obtain a manganese-doped zinc oxide deposited NaYF with visible / near-infrared photocatalytic activity. 4:Yb,ErSiO 2 Photocatalytic antibacterial materials with core-shell structure.

Embodiment 1

[0042] 0.78mmol yttrium acetate, 0.2mmol ytterbium acetate, 0.02mmol erbium acetate, 1mmolNaCl and 36mmolNH 4 F was dissolved in 35ml of ethylene glycol and stirred evenly, poured into a microwave digestion tank, placed in a microwave digestion apparatus at 180°C for 1 hour, washed and dried to obtain NaYF 4 : Yb, Er up-conversion fluorescent material, the microstructure of the resulting product is as follows figure 1 shown.

Embodiment 2

[0044] Using the process in Example 1, reducing the amount of ytterbium acetate to 0.15 mmol, and setting the microwave digestion temperature at 150°C, NaYF can also be obtained 4 : Yb, Er spherical nanoparticles, such as figure 2 As shown, the fluorescence intensity changes as image 3 shown.

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Abstract

The invention discloses a composite photocatalytic antibacterial material and a preparation method thereof; particularly, a ytterbium-erbium co-doped sodium yttrium fluoride (NaYF4:Yb,Er) and manganese-doped zinc oxide are combined to prepare the photocatalytic antibacterial material driven by visible/near-infrared light. The preparation method comprises the steps: together dissolving sodium chloride, yttrium acetate, ytterbium acetate, erbium acetate and ammonium fluoride in an ethylene glycol/water mixed solvent, and carrying out a microwave assisted solvothermal reaction to obtain NaYF4:Yb,Er spherical nanoparticles; dispersing the NaYF4:Yb,Er in an isopropanol/water/ammonia water mixed solvent, adding tetraethyl orthosilicate, and carrying out hydrolysis for 5 h, to obtain an NaYF4:Yb,Er@SiO2 core-shell structure; and carrying out ultrasonic dispersion of the NaYF4:Yb,Er@SiO2 in diethylene glycol, adding a zinc salt and a manganese salt, carrying out a heating reflux reaction at the temperature of 180 DEG C for 1-6 h, then washing, drying, and calcining for 2 h at the temperature of 500 DEG C to obtain the product. The material can convert the visible/near-infrared light into UV/visible light, manganese-doped zinc oxide absorbs the UV/visible light to produce electrons-holes, and the electrons-holes act on the environment to produce free radicals to participate in a sterilization process, and the material can be used in the field of photodynamic therapy.

Description

technical field [0001] The invention relates to the fields of visible / near-infrared photocatalytic antibacterial materials and environmental protection, in particular to manganese-doped zinc oxide deposited with ytterbium-erbium co-doped with fluorine and having visible / near-infrared photocatalytic antibacterial activity by using a heating reflux-calcination process A facile method for photodynamic antibacterial materials with sodium yttrium core-shell structure. Background technique [0002] In recent years, the research on using up-conversion luminescent materials to expand the range of light energy utilization by photocatalysts has attracted continuous attention. The essence is to use up-conversion luminescent materials to convert visible light or infrared light into photocatalysts (ZnO, TiO 2 etc.) can absorb ultraviolet light or visible light, and indirectly realize more effective use of light energy. [0003] Zinc oxide (ZnO) is a wide bandgap semiconductor oxide with...

Claims

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Application Information

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IPC IPC(8): B01J27/138A01N59/16A01P1/00
CPCA01N59/16B01J27/138B01J35/004
Inventor 乔儒谭林香柯晓霞李正全朱兰兰
Owner ZHEJIANG NORMAL UNIVERSITY
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