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Method for preparing interface optical catalyst

A photocatalyst, photocatalysis technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of zero photocatalytic activity and loss of application value, etc.

Active Publication Date: 2008-01-09
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the particles developed by this method can be suspended on the water / air interface for a long time, because the active surface of the titanium dioxide particles is wrapped by the silicon dioxide of the insulator, its photocatalytic activity is almost zero. Value

Method used

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  • Method for preparing interface optical catalyst
  • Method for preparing interface optical catalyst
  • Method for preparing interface optical catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1, please refer to Figure 9,

[0046] (1) Firstly, the hollow photocatalytic particle SiO with a silica shell-hollow layer-titania nano-core structure is produced 2 @@TiO 2 , (see 200610154415.X for the accompanying drawings).

[0047] (a) Pretreatment of titania nanoparticles with TiO 2 To represent,

[0048] Add 100 mg of titanium dioxide nanoparticles into a NaOH solution with a concentration of 0.5 mol / L, and magnetically stir at a speed of 500 rpm for 7 hours, then wash with water three times and centrifuge until the pH is 7 for use.

[0049] (b) The process of wrapping carbon on the surface of nanoparticles, using C@TiO 2 To represent,

[0050] Add 100 mg of nanoparticles prepared in step (a) into polyvinyl alcohol resin (PVA) in an aqueous solution of carbon-containing organic matter soluble in water at a concentration of 0.7 mol / L. After thorough mixing, the mixed solution was introduced into a hydrothermal reaction kettle, and heat-treated at 1...

Embodiment 2

[0064] Embodiment 2, please refer to Figure 9,

[0065] (1) Firstly, the hollow photocatalytic particle SiO with a silica shell-hollow layer-titania nano-core structure is produced 2 @@TiO 2 , (see 200610154415.X for the accompanying drawings).

[0066] (a) Pretreatment of titania nanoparticles with TiO 2 To represent,

[0067] Add 500 mg of titanium dioxide nanoparticles into HCl solution with a concentration of 1.2 mol / L, and magnetically stir at 1000 rpm for 14 hours, then wash with water five times and centrifuge until the pH is 7 for use.

[0068] (b) The process of wrapping carbon on the surface of nanoparticles, using C@TiO 2 To represent,

[0069] Add 450 mg of nanoparticles prepared in step (a) into polyethylene glycol (PEG) in an aqueous solution of carbon-containing organic matter soluble in water at a concentration of 2.2 mol / L. After thorough mixing, the mixed solution was introduced into a hydrothermal reaction kettle, and heat-treated at 200° C. for 8 hour...

Embodiment 3

[0083] Embodiment 3, please refer to Fig. 9,

[0084] (1) Firstly, the hollow photocatalytic particle SiO with a silica shell-hollow layer-titania nano-core structure is produced 2 @@TiO 2 , (see 200610154415.X for the accompanying drawings).

[0085] (a) Pretreatment of titania nanoparticles with TiO 2 To represent,

[0086] Add 300 mg of titanium dioxide nanoparticles into NaOH solution with a concentration of 0.8 mol / L, and magnetically stir at 750 rpm for 10 hours, then wash with water four times and centrifuge until the pH is 7 for use.

[0087] (b) The process of wrapping carbon on the surface of nanoparticles, using C@TiO 2 To represent,

[0088] 275 mg of nanoparticles prepared in step (a) was added into an aqueous solution of carbon-containing organic matter soluble in water sucrose (Sucrose) with a concentration of 1.4 mol / L. After thorough mixing, the mixed solution was introduced into a hydrothermal reaction kettle, and heat-treated at 175° C. for 5 hours. A...

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Abstract

The present invention relates to one kind of interface photocatalyst, and solves the technological problem of preparing one interface photocatalyst capable of floating on water surface for photocatalytic reaction and with lasting photocatalytic activity. The interface photocatalyst floating on water surface can utilize sunlight well for photocatalysis to decompose pollutant and may be recovered easily, with the decomposition produced CO2 being dispersed to the air directly. It is prepared through the following steps: 1. preparing photocatalyst particle in SiO2-hollow layer-TiO2 structure and with nanometer core; 2. preparing hydrophobic solution; 3. preparing hydrophobic hollow nanometer photocatalyst particle; and 4. cross-linking hydrophobic groups of hollow nanometer photocatalyst particle. The present invention is applied in degrading toxic pollutant to protect environment.

Description

technical field [0001] The invention relates to a preparation method of an interface photocatalyst. It can be used to effectively degrade toxic pollutants and protect the environment. Background technique [0002] Since Fujishima and Honda have successfully utilized TiO 2 Since the photoelectrocatalytic splitting of water to produce hydrogen, TiO 2 Applications in photoelectric conversion, gas sensing, light sensing, and pollutant degradation have been extensively studied. Since the nano-titanium dioxide particles are excited by ultraviolet light, electrons and positive holes can be separated, thus having a strong redox ability. This redox ability is so strong that it can even break the C-H bond, so it can be used to decompose most of the organic matter. [0003] On the other hand, in recent years, the problem of pollution has attracted more and more attention. Environmental problems caused by toxic and refractory organic pollutants (such as dyes, pesticides, etc.) cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/025
Inventor 王騊王晟陈文兴
Owner ZHEJIANG SCI-TECH UNIV
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