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A kind of titanium dioxide nanofiber membrane material modified by silver nanoparticles and its preparation method and application

A nanofiber membrane and silver nanoparticle technology, which is applied in the field of separation, analysis and detection of environmental pollutants, can solve the problems of limiting the practical application of nanofiber membranes, difficult to achieve interception of small organic molecules, and low mechanical strength of nanofiber membranes. The effect of easy large-scale industrial application, stable properties and simple preparation method

Active Publication Date: 2020-08-07
南京盈钢新型材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is relatively complicated, and it is difficult to obtain good repeatability, and the pores in the formed nanofibrous membrane are relatively large, making it difficult to effectively intercept small organic molecules.
In addition, the mechanical strength of the prepared nanofibrous membrane is very low due to the weak binding force between the synthesized nanofibers, which limits the practical application of the nanofibrous membrane as a separation tool.

Method used

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  • A kind of titanium dioxide nanofiber membrane material modified by silver nanoparticles and its preparation method and application
  • A kind of titanium dioxide nanofiber membrane material modified by silver nanoparticles and its preparation method and application
  • A kind of titanium dioxide nanofiber membrane material modified by silver nanoparticles and its preparation method and application

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Embodiment 1

[0053] This embodiment provides a method for preparing a titanium dioxide nanofiber membrane material modified by silver nanoparticles, comprising the following steps:

[0054] S0. Cut the carbon paper into small pieces of 50mm×20mm×0.20mm, then ultrasonically wash with acetone, isopropanol, ethanol and water for 10 minutes, and then dry at 80°C;

[0055] S1. Add 20mL tetrabutyl titanate into a 200mL beaker, add 100mL absolute ethanol while stirring, then add 0.2mL glacial acetic acid, and keep stirring at room temperature until the reaction solution is milky white to obtain a titanium dioxide sol;

[0056] S2. impregnating the carbon paper described in step S0 in the titanium dioxide sol, and adsorbing titanium dioxide nanoparticles on the surface of the carbon paper to obtain carbon paper loaded with titanium dioxide nanoparticles;

[0057] Described step S2 comprises the following steps:

[0058] S201. impregnating the carbon paper in the titanium dioxide sol, ultrasonical...

Embodiment 2

[0078] The titanium dioxide nanofiber membrane material modified with silver nanoparticles prepared in Example 1 was used to test the filtration performance and self-cleaning performance of organic dye molecules.

[0079] Firstly, the filtration performance of silver nanoparticles-modified titanium dioxide nanofiber membrane materials on organic dye molecules was tested. Positively charged rhodamine 6G (hereinafter referred to as: Rh6G) was selected as a model molecule to study the enrichment and filtration properties of silver nanoparticles modified titanium dioxide nanofiber membrane materials for organic molecules. The titanium dioxide nanofiber membrane material modified with silver nanoparticles was cut into small pieces of 2cm×2cm, and fixed in a self-made filter device with silicone rubber. Take 7mL concentration to be 10mg·L -1 The Rh6G solution is placed in a self-made filter device, and the solution is allowed to pass through the titanium dioxide nanofiber membrane ...

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Abstract

The invention relates to a silver nanoparticle modified titanium dioxide nanofiber membrane material as well as a preparation method and application thereof. The method comprises the steps of: growinga titanium dioxide nanofiber membrane on carbon paper serving as a carrier to obtain a titanium dioxide nanofiber membrane material; dissolving ethylene glycol in water to obtain an ethylene glycol solution, and then sequentially adding polyvinylpyrrolidone-K30, sodium borohydride and silver nitrate to the ethylene glycol solution to obtain a silver sol; and immersing the titanium dioxide nanofiber membrane material in the silver sol to obtain the silver nanoparticle modified titanium dioxide nanofiber membrane material. The silver nanoparticle modified titanium dioxide nanofiber membrane material prepared by the invention has good filtering, photocatalytic self-cleaning and surface enhanced Raman scattering detection functions on positively charged organic molecules.

Description

technical field [0001] The invention relates to the field of separation, analysis and detection of environmental pollutants, in particular to a titanium dioxide nanofiber membrane material modified by silver nanoparticles and its preparation method and application. Background technique [0002] At present, the pollution of water, air, soil and food has seriously threatened the survival and health of human beings. Among them, organic pollutants are one of the most serious pollution sources. How to enrich, separate, detect and eliminate these pollutants is an important issue we are currently facing. At present, column chromatography is generally used for the separation of organic pollutants, especially small organic molecules, but this method has a complicated pre-treatment process, a long analysis time, and requires the operator to have skilled experimental skills. Therefore, it is very necessary to develop new materials and methods to realize the simple and efficient separa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/02B01D71/02C02F1/28C02F1/32C02F1/44G01N21/65C02F101/30
CPCB01D67/0039B01D67/0044B01D69/02B01D71/024B01D2325/10B01D2325/12C02F1/281C02F1/283C02F1/32C02F1/44C02F2101/30C02F2305/10G01N21/658
Inventor 王永吴长宇徐凯李菁菁韩翠平隋美蓉
Owner 南京盈钢新型材料科技有限公司
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