Photocatalytic fabric as well as preparation method and application thereof

A photocatalysis and fabric technology, applied in the fields of material chemistry and photocatalysis, can solve the problems of unsuitable catalyst particles, and achieve the effects of excellent visible light catalytic activity, stable physical and chemical properties, and easy synthesis.

Active Publication Date: 2021-09-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for this two-step spinning method, on the one hand, because the diameter of the fiber is generally several hundred nanometers to several microns, it is not suitable for the situation of large catalyst particles; on the other hand, when the catalyst particles are small, most of the particles will be absorbed by the fibers. Completely wrapped, only a small part exposed on the surface of the fiber has catalytic activity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Photocatalytic fabric as well as preparation method and application thereof
  • Photocatalytic fabric as well as preparation method and application thereof
  • Photocatalytic fabric as well as preparation method and application thereof

Examples

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preparation example Construction

[0024] The invention provides a method for preparing a photocatalytic fabric, comprising:

[0025] First, the metal precursor with a concentration of 0.001-0.1mol / L, the ligand with a concentration of 0.002-0.4mol / L and the polymer with a concentration of 50-500g / L are completely dissolved in a solvent at 0-80°C to obtain a colored and transparent Spinning solution, wherein the concentration of the ligand is 2 to 4 times that of the metal precursor; the metal precursor includes a mixture of one or more of soluble bismuth, manganese, iron, cobalt, nickel, cadmium, antimony and lead salts , and soluble metal salts include chloride, nitrate, acetate or citrate; add acid to the easily hydrolyzed metal ion in the spinning solution to adjust the pH value to be less than 2, and the easily hydrolyzed metal ion includes bismuth or antimony, said Acids include hydrochloric acid, sulfuric acid or nitric acid; ligands include one or more mixtures of dithiocarbamate, trithiocyanate, porphy...

Embodiment 1

[0033]The preparation method includes: first, 0.2mmol of bismuth chloride, 0.7mmol of sodium diethyldithiocarbamate and 1g of polyacrylonitrile are completely dissolved in 10mL of N,N-dimethylformamide at 25°C, and then hydrochloric acid is added Adjust the pH to be less than 2 to obtain a yellow and transparent spinning solution; then place the spinning solution in an electrospinning machine, apply a voltage of 25kV at 25°C for electrospinning, and obtain N,N-dimethylformamide after volatilization Bismuth diethyldithiocarbamate photocatalytic fabric.

[0034] The photocatalytic fabric product that embodiment 1 prepares is as figure 1 shown, from figure 1 It can be seen that the product is a colored fabric in appearance, indicating that it has visible light absorption characteristics; it is observed with a scanning electron microscope, as shown figure 2 As shown, the microstructure of the product is a porous nanofiber structure, the fiber diameter is tens of nanometers, and...

Embodiment 2

[0036] The preparation method includes: firstly, 0.2 mmol of bismuth acetate, 0.7 mmol of sodium dibutyldithiocarbamate and 1 g of polystyrene are completely dissolved in 10 mL of dimethyl sulfoxide at 30° C., and then hydrochloric acid is added to adjust the pH to less than 2. A yellow transparent spinning solution is obtained; then the spinning solution is subjected to solution spinning at 60° C., and after dimethyl sulfoxide volatilizes, a photocatalytic fabric of bismuth dibutyldithiocarbamate is obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a photocatalytic fabric as well as a preparation method and application thereof, and belongs to the technical field of material chemistry and photocatalysis. The preparation method comprises the following steps of dissolving a metal precursor, a ligand and a polymer in a solvent together to obtain a spinning solution; and spinning the spinning solution into a fabric to obtain the fabric with the photocatalytic function. A metal complex catalyst in the photocatalytic fabric prepared by the invention is uniformly loaded on the surface of the fiber, the loading capacity is large, and the photocatalytic fabric has excellent visible light catalytic activity, is simple to synthesize, low in cost, non-toxic, environment-friendly and stable in physicochemical property, and has relatively high photocatalytic degradation efficiency when being applied to treatment of micro-polluted water or volatile organic compounds; and the method is compatible with an industrial fabric manufacturing process and has the potential of industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and photocatalysis, and in particular relates to a photocatalytic fabric and its preparation method and application. Background technique [0002] Photocatalysis is one of the effective technologies for micro-polluted water bodies (micro-pollution of water sources and rivers, tail water of sewage treatment plants, rural sewage pits and black and odorous water bodies in urban and rural areas, etc.) and volatile organic compounds (VOC). Since 2018, TiO 2 Photocatalytic nets have successively achieved good results in the treatment of micro-polluted water bodies in Shaanxi, Jiangsu and Guangdong, which has greatly promoted the practical application of photocatalytic technology. In practical applications, it is necessary to use adhesives to bond TiO 2 The catalyst is bonded to the base net to make a photocatalytic net, which is laid a few centimeters below the water surface, so that it can...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D5/04B01J31/22B01J31/18C02F1/30B01D53/86B01D53/44C02F101/30
CPCD01D5/0038D01D5/04B01J31/226B01J31/1835B01J31/1815B01J35/004B01J35/0013C02F1/30B01D53/8687B01J2531/54B01J2531/27B01J2531/842B01J2531/72B01J2531/845B01J2531/847B01J2531/44B01J2531/0213B01D2259/804B01D2258/06B01D2257/708C02F2101/30Y02W10/37
Inventor 杨亚威阙文修蒙渊滕伟刘紫剑赵彦君
Owner XI AN JIAOTONG UNIV
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