Preparation method and application of Ag/carbon quantum dot/phosphotungstic acid composite material

A technology of carbon quantum dots and composite materials, which is applied in chemical instruments and methods, water/sludge/sewage treatment, molecular sieve catalysts, etc., can solve the problems of complex and cumbersome preparation methods of nano-composite materials, and the photocatalytic effect cannot be reused. , to achieve the effect of low cost, simple process and high reuse rate

Pending Publication Date: 2022-07-01
JINLIN MEDICAL COLLEGE
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the existing complex and cumbersome preparation methods of nano-composite materials for degrading dyes, which cannot be reused and have poor photocatalytic effects, and provide a preparation method for Ag / carbon quantum dots / phosphotungstic acid composite materials

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  • Preparation method and application of Ag/carbon quantum dot/phosphotungstic acid composite material
  • Preparation method and application of Ag/carbon quantum dot/phosphotungstic acid composite material
  • Preparation method and application of Ag/carbon quantum dot/phosphotungstic acid composite material

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specific Embodiment approach 1

[0020] Embodiment 1: A preparation method of Ag / carbon quantum dots / phosphotungstic acid composite material in this embodiment is completed according to the following steps:

[0021] 1. Add the aqueous solution of phosphotungstic acid and carbon quantum dots into distilled water, and ultrasonically disperse to obtain a mixed solution;

[0022] 2. Transfer the mixed solution to a reaction kettle lined with tetrafluoroethylene, then immerse the zeolite in the reaction kettle, raise the temperature to carry out a hydrothermal reaction, the hydrothermal reaction ends, take out the zeolite, wash, and dry to obtain carbon quantum dots / phosphotungstic acid coated zeolite;

[0023] 3. Immerse the carbon quantum dots / phosphotungstic acid-coated zeolite into AgNO under UV light irradiation 3 In the solution, a reaction product is obtained through an in-situ photoreduction reaction; the reaction product is washed and then dried to obtain an Ag / carbon quantum dot / phosphotungstic acid c...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the concentration of the carbon quantum dot aqueous solution described in step 1 is 6 mg / mL to 7 mg / mL. Other steps are the same as in the first embodiment.

[0025] The preparation method of the carbon quantum dot aqueous solution described in this embodiment is as follows: put a graphite rod into water, continuously electrolyze it at 30V for 120 hours, then filter and wash it.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of the phosphotungstic acid described in step 1 to the volume ratio of the carbon quantum dot aqueous solution is (3g~5g): (7mL~ 8mL); the volume ratio of the carbon quantum dot aqueous solution described in step 1 to distilled water is (7mL~8mL): (30mL~40mL). Other steps are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method and application of an Ag / carbon quantum dot / phosphotungstic acid composite material, and relates to a preparation method and application of a composite material. The invention aims to solve the problems that the existing preparation method of the nano composite material for degrading the dye is complicated and tedious, cannot be repeatedly used and is poor in photocatalytic effect. The method comprises the following steps: 1, adding phosphotungstic acid and a carbon quantum dot aqueous solution into distilled water to obtain a mixed solution; 2, hydrothermal reaction; and 3, adding an AgNO3 solution, and carrying out an in-situ photo-reduction reaction. The Ag / carbon quantum dot / phosphotungstic acid composite material is used for degrading dye. The Ag / carbon quantum dot / phosphotungstic acid composite material prepared by the invention can be used for completely degrading dye within 10 minutes. After the catalyst is repeatedly used for five times, the catalytic degradation efficiency still can reach 90% or above, and the repeated utilization rate is very high. According to the preparation method of the Ag / carbon quantum dot / phosphotungstic acid composite material, the Ag / carbon quantum dot / phosphotungstic acid composite material can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a composite material. Background technique [0002] Photocatalysis technology is a green technology with important application prospects in the fields of energy and environment. The principle of photocatalysis is to purify pollutants based on the redox ability of photocatalysts under ultraviolet or visible light irradiation. Industrial production will produce a large amount of industrial wastewater, which contains organic pollutants that affect human life and even threaten human life. The use of materials' light-responsive properties to degrade organic pollutants has become a research hotspot in recent years. [0003] Rhodamine B, methyl orange solution or methyl blue solution are typical industrial dye wastewaters. Due to the characteristics of strong toxicity, refractory degradation, and easy carcinogenicity of organic substances, they are wastewaters that need to be treated urgently; ...

Claims

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Application Information

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IPC IPC(8): B01J29/00C02F1/30C02F101/30
CPCB01J29/00C02F1/30C02F2101/308C02F2305/10B01J35/39
Inventor 隋春红张涵王程李文亮肖箫崔桂花王佳旭刘冰刘姝霖嫣然
Owner JINLIN MEDICAL COLLEGE
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