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Composite photocatalyst for treating textile printing and dyeing wastewater, and fibers and preparation method thereof

A composite photocatalyst, textile printing and dyeing technology, applied in chemical instruments and methods, catalyst activation/preparation, special compound water treatment, etc., can solve the problems of small contact area, low utilization rate, low separation efficiency, etc., to achieve high photocatalytic performance, The effect of easy recycling and solving pollution

Pending Publication Date: 2021-01-19
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, graphite-phase carbon nitride does not absorb enough visible light, and reacts insufficiently under the irradiation of visible light; the separation efficiency of graphite-phase carbon nitride photogenerated carriers is relatively low, and the reaction time required without the interference of other conditions is relatively long ; The specific surface area of ​​graphite phase carbon nitride is relatively small, and the contact area with the reactant is relatively small during the catalytic reaction, so that the utilization rate is relatively low; the conductivity of graphite phase carbon nitride is relatively poor
According to the disadvantages of graphite phase carbon nitride, we solved the problems of high electron-hole pair recombination efficiency and low utilization rate of visible light through the composite of graphite phase carbon nitride and silicon dioxide.

Method used

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  • Composite photocatalyst for treating textile printing and dyeing wastewater, and fibers and preparation method thereof
  • Composite photocatalyst for treating textile printing and dyeing wastewater, and fibers and preparation method thereof
  • Composite photocatalyst for treating textile printing and dyeing wastewater, and fibers and preparation method thereof

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preparation example Construction

[0032] The invention provides a method for preparing a composite photocatalyst for treating textile printing and dyeing wastewater, such as figure 1 shown, including the following steps:

[0033] Step 1, prepare a three-necked flask, add deionized water and absolute ethanol to it at a volume ratio of 1:1, record the total volume of deionized water and absolute ethanol as V;

[0034] Step 2. Add graphite phase carbon nitride to the three-necked flask, magnetically and ultrasonically stir for 10 to 120 minutes, the mass volume ratio of the added graphite phase carbon nitride to V is 1 to 7:100, the mass unit is g, and the volume unit is in mL;

[0035] Step 3. Add fumed silica to the three-necked flask, magnetically and ultrasonically stir for 10-120 minutes, and the mass ratio of added fumed silica to graphite carbon nitride is 1:5-30;

[0036] Step 4, put the three-necked flask into a vacuum drying oven for drying, and the drying temperature is 50-80°C;

[0037] Step 5. Pou...

Embodiment 1

[0042] Prepare a three-necked flask, add 10mL of deionized water and 10mL of absolute ethanol to it; then add 0.3g of graphite phase carbon nitride to the three-necked flask, stir magnetically and ultrasonically for 20min; then add 0.03g of Fumed silica, magnetically and ultrasonically stirred for 20 minutes; put the three-necked flask into a vacuum drying oven to dry at 60°C; pour the dried sample into a mortar and grind it into powder to obtain silica - Graphite phase carbon nitride composite photocatalyst.

[0043] Weigh polyethylene terephthalate pellets and the prepared silica-graphite phase carbon nitride composite photocatalyst (mass ratio is 10:1) and add to hexafluoroisopropanol (polyethylene terephthalate The mass volume ratio of ethylene glycol ester and hexafluoroisopropanol is 1g: 6mL), obtain photocatalyst emulsion, carry out electrospinning to the emulsion product that obtains after ultrasonic dispersion (electrospinning parameter is: voltage is 12kV, spinning sp...

Embodiment 2

[0045] Prepare a three-necked flask, add 15mL of deionized water and 15mL of absolute ethanol to it; then add 2.1g of graphite phase carbon nitride to the three-necked flask, magnetically and ultrasonically stir for 120min; then add 0.07g of Fumed silica, magnetically and ultrasonically stirred for 120 minutes; put the three-necked flask into a vacuum drying oven to dry at a temperature of 80°C; pour the dried sample into a mortar and grind it into powder to obtain silica - Graphite phase carbon nitride composite photocatalyst.

[0046] Weigh polyethylene terephthalate pellets and the prepared silica-graphite phase carbon nitride composite photocatalyst (mass ratio is 10:1) and add to hexafluoroisopropanol (polyethylene terephthalate The mass volume ratio of ethylene glycol ester and hexafluoroisopropanol is 1g: 6mL), obtain photocatalyst emulsion, carry out electrospinning to the emulsion product that obtains after ultrasonic dispersion (electrospinning parameter is: voltage ...

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Abstract

The invention discloses a composite photocatalyst for treating textile printing and dyeing wastewater and a preparation method of the composite photocatalyst, and the preparation method comprises thefollowing steps: preparing a three-neck flask, and adding deionized water and absolute ethyl alcohol into the three-neck flask; then adding graphite-phase carbon nitride into the three-neck flask, andcarrying out magnetic force and ultrasonic stirring; then adding fumed silica into the three-neck flask, and carrying out magnetic force and ultrasonic stirring; putting the three-neck flask into a vacuum drying box for drying; and pouring the dried sample into a mortar, and grinding into powder. The invention also discloses a composite photocatalyst fiber for treating textile printing and dyeingwastewater and a preparation method of the composite photocatalyst fiber. The composite photocatalyst for treating textile printing and dyeing wastewater has high photocatalytic performance on printing and dyeing wastewater, the problem of existing printing and dyeing wastewater pollution is solved, and the preparation method has the advantages of easily available preparation raw materials and simple operation; according to the composite photocatalyst fiber for treating textile printing and dyeing wastewater and the preparation method of the composite photocatalyst fiber, the prepared composite photocatalyst fiber is convenient to recycle.

Description

technical field [0001] The invention belongs to the technical field of textile engineering materials, and specifically relates to a composite photocatalyst for treating textile printing and dyeing wastewater, and also relates to a preparation method of the composite photocatalyst for treating textile printing and dyeing wastewater; the present invention also relates to a composite photocatalyst fiber for treating textile printing and dyeing wastewater, It also relates to a preparation method of the composite photocatalyst fiber for treating textile printing and dyeing wastewater. Background technique [0002] With the development of the textile industry, printing and dyeing wastewater has caused a great impact on the environment. Nanophotocatalytic technology can utilize clean and sustainable solar energy, and can also degrade and decompose pollutants in the air or water. Improving the performance of photocatalysts is the key to improving photocatalytic technology. Among m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/06B01J37/34B01J35/02C02F1/30C02F101/30C02F101/38C02F103/30B01J35/00
CPCB01J27/24C02F1/30B01J37/342C02F2305/10C02F2103/30C02F2101/38C02F2101/308B01J35/50B01J35/58B01J35/39B01J35/40
Inventor 卢定泽吴琼曾宜梅张育豪张勃宇刘林滔郝红娟
Owner XI'AN POLYTECHNIC UNIVERSITY