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Preparation method of visible light composite photocatalyst and finishing method for fabric by visible light composite photocatalyst

A technology of composite light and visible light, applied in the field of textile materials, can solve the problems of low quantum efficiency, application hindrance, low energy efficiency, etc., and achieve the effect of high activity, high energy efficiency, efficient and durable self-cleaning performance

Active Publication Date: 2017-11-24
苏州安蓝纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide bandgap (~3.2eV) of titania, TiO 2 It can only be activated by ultraviolet light irradiation, which only accounts for 3-5% of solar energy, and its energy efficiency is low, so its application in water purification is greatly hindered
In addition, electrons and holes are easy to recombine, and the quantum efficiency is low.

Method used

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  • Preparation method of visible light composite photocatalyst and finishing method for fabric by visible light composite photocatalyst
  • Preparation method of visible light composite photocatalyst and finishing method for fabric by visible light composite photocatalyst

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preparation example Construction

[0024] A method for preparing a visible light composite photocatalyst according to an embodiment of the present invention comprises the following steps:

[0025] Step 101): preparing titanium dioxide nanobelts.

[0026] Step 102): preparing a self-doping tin dioxide precursor solution; the chemical formula of the self-doping tin dioxide is SnO 2-x . Wherein, x represents the doping ratio of divalent tin, and the value of x ranges from 0 to 1. The value of x can be 1, 0 or a value between 0 and 1.

[0027] Step 103): preparing self-doped tin dioxide and titanium dioxide nanobelt heterostructure visible light composite photocatalyst.

[0028] Step 104): Perform surface modification on the visible light composite photocatalyst prepared in step 103) to prepare anion-modified visible light composite photocatalyst.

[0029] In the above embodiment, as a preference, the process of step 101) is: dissolving the titanium dioxide powder in a NaOH solution with a molar concentration o...

Embodiment 1

[0044] Step 1): preparing a visible light composite photocatalyst, including:

[0045] Step 101): dissolving titanium dioxide powder in a NaOH solution with a molar concentration of 10 mol / L, the mass concentration of titanium dioxide being 5 g / L, ultrasonically stirring the solution, and then placing the solution in a polytetrafluoroethylene-lined stainless steel reaction kettle, After reacting at 150°C for 4 to 5 hours, the reaction product was taken out and cooled to room temperature, the reaction product was washed with deionized water until the pH value was 7, the alkali and sodium titanate were removed, and sodium trititanate nanobelts were obtained; the sodium trititanate nanobelts were Place in a hydrochloric acid solution with a molar concentration of 0.1mol / L, soak for 44 hours, wash the reaction product with deionized water until the pH value is 7, remove excess acid, chloride ions and sodium ions, and obtain titanate nanobelts; bake at 65°C Dry titanate nanobelts t...

Embodiment 2

[0052] Step 1): preparing a visible light composite photocatalyst, including:

[0053] Step 101): dissolving the titanium dioxide powder in a NaOH solution with a molar concentration of 5 mol / L, the mass concentration of titanium dioxide being 8 g / L, ultrasonically stirring the solution, and then placing the solution in a polytetrafluoroethylene-lined stainless steel reaction kettle, After reacting at 160°C for 48 hours, take out the reaction product and cool it to room temperature, wash the reaction product with deionized water until the pH value is 7, remove the alkali and sodium titanate, and obtain sodium trititanate nanobelts; place the sodium trititanate nanobelts After soaking in a hydrochloric acid solution with a molar concentration of 0.05mol / L for 42 hours, wash the reaction product with deionized water until the pH value is 7, remove excess acid, chloride ions and sodium ions, and obtain titanate nanobelts; dry at 70°C Titanate nanobelts are formed into titanate na...

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Abstract

The invention discloses a preparation method of a visible light composite photocatalyst and a finishing method for fabric by the visible light composite photocatalyst. The preparation method comprises the following steps: step 101): preparing a titanium dioxide nanobelt; step 102): preparing a self-doped stannic oxide precursor solution; step 103): preparing the visible light composite photocatalyst with a heterostructure doped with the stannic oxide and the titanium dioxide nanobelt; step 104): carrying out surface modification on the visible light composite photocatalyst prepared in the step 103) to obtain a visible light composite photocatalyst modified by anion. According to the visible light composite photocatalyst prepared by the method, energy efficiency and activity of the photocatalyst can be improved; in addition, the self-cleaning property, ultraviolet resistance, antibacterial property, antistatic property and moisture absorption property of the fabric are improved by the visible light composite photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a preparation method of a visible light composite photocatalyst and a method for fabric finishing thereof. Background technique [0002] In the next two decades, environmental pollution control will become an urgent global problem to be solved. Photocatalysts can produce highly oxidatively active species in water under solar radiation to mineralize organic pollutants. Therefore, photocatalytic technology is a simple and environmentally friendly solution to environmental pollution problems. Currently, titanium dioxide (TiO 2 ) are widely used as semiconductor photocatalytic materials. However, due to the wide bandgap (~3.2eV) of titania, TiO 2 It can only be activated by ultraviolet light irradiation, which only accounts for 3-5% of solar energy, and its energy efficiency is low, so its application in water purification is greatly hindered. In addition, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J23/14B01J35/10D06M11/46
CPCD06M11/46D06M16/00B01J23/002B01J23/14B01J31/38D06M2200/25D06M2200/01B01J35/615B01J35/39
Inventor 祁珍明王春霞郑成辉季萍陈晓敏唐琪符宇航姚鑫陈海家
Owner 苏州安蓝纺织科技有限公司
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