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Functional nano Ti2O/Cu2O heterophase Fenton thin film and preparation method as well as use

A functional nano and heterogeneous technology, applied in chemical instruments and methods, anti-fouling/underwater coatings, chemical/physical processes, etc., can solve problems such as easy recombination, accelerated oxidation, and low carrier transport efficiency, and achieve chemical The effect of good stability and wide application prospects

Inactive Publication Date: 2008-12-17
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of semiconductors with narrow bandgap for photocatalysts has the problem of low photo-excited carrier transport efficiency and easy recombination [Chem.Rev.1998, 171, 175]
At the same time, Cu 2 O is easily oxidized and loses photocatalytic activity when exposed to water for a long time

Method used

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  • Functional nano Ti2O/Cu2O heterophase Fenton thin film and preparation method as well as use
  • Functional nano Ti2O/Cu2O heterophase Fenton thin film and preparation method as well as use
  • Functional nano Ti2O/Cu2O heterophase Fenton thin film and preparation method as well as use

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of TiO by Electrochemical Method 2 / Cu 2 O nanocomposites to finally obtain functional nano-TiO 2 / Cu 2 The process of O heterogeneous Fenton composite thin film material:

[0039] Add 2g of mechanically ground nano-TiO to the cathode cell before electrolysis 2 (P25, TiO with 80% anatase and 20% rutile 2 , Dessuga Co) The electrolyte is 0.1 mol / L NaOH alkaline solution, titanium is used as the cathode; 1M NaCl salt solution is added to the anode cell, the copper plate is used as the anode, and the copper is reduced to Cu by electrolysis 2 O. During electrolysis, the current is controlled to be 0.5A, the temperature is about 80°C, and the reaction time is 20 minutes. Stirring should be continued during the electrolysis process. The electrolysis product was separated by centrifugation, washed three times with ethanol and distilled water, and dried in vacuum at 60°C to obtain TiO 2 / Cu 2 O (mass ratio of 1:1) nanocomposites. The prepared 1g of the abov...

Embodiment 2

[0053] Preparation of TiO by Chemical Deposition 2 / Cu 2 O nanocomposites to finally obtain nano-TiO 2 / Cu 2 The process of O heterogeneous Fenton composite thin film material:

[0054] In 200ml of diethylene glycol solvent, add 4g of mechanically ground nano-TiO 2 (P25, TiO with 80% anatase and 20% rutile 2 , Dessuga Co) and 0.1M copper acetate, and stirred to make TiO 2 Disperse evenly in the system. Raise the temperature to about 180°C, and the reaction time is 3 hours, and the stirring should be continued during the reaction. After the reaction was completed, the product was centrifuged and washed three times with ethanol, and then vacuum-dried at 60°C to obtain TiO 2 / Cu 2 O nanocomposites. The 2g above-mentioned composite material that makes and 15ml lithium water glass (Li 2 SiO 3 , containing 20% ​​SiO 2 , New Material Factory of Central China Normal University) mixed and uniformly coated on the surface of glass fiber cloth (300mm×300mm) to make TiO 2 / Cu ...

Embodiment 3

[0057] Preparation of TiO by hydrothermal (or solvothermal) method 2 / Cu 2 O nanocomposites to finally obtain nano-TiO 2 / Cu 2 The process of O heterogeneous Fenton composite thin film material:

[0058] Before the reaction, add 3 g of mechanically ground nano-TiO in 80 ml of ethanol-water mixed solvent (the volume ratio of ethanol to water is 1:3). 2 (P25, TiO with 80% anatase and 20% rutile 2 , Dessuga Co) and 0.05M copper sulfate, adjust the pH value to 7-9, ultrasonically make TiO 2 Disperse evenly in the system. Transfer the mixed solution to a hydrothermal kettle, put it into a muffle furnace, raise the temperature to 180-200° C., and the reaction time is 18 hours. After the reaction was completed, the product was centrifuged, washed three times with ethanol and distilled water, and dried in vacuum at 60°C to obtain TiO 2 / Cu 2 O nanocomposites. The prepared 3g of the above TiO 2 / Cu 2 O nanocomposites with 15ml lithium water glass (Li 2 SiO 3 , containing 2...

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Abstract

The invention relates to a nanometer TiO2 / Cu2O out-phase Fenton laminated film material which consists of a TiO2 / Cu2O nanocomposite and an inorganic coating binder, wherein, the mass ratio between the TiO2 / Cu2O nanocomposite and the inorganic coating binder is 1:1-1:500; the mass ratio between TiO2 and Cu2O in the TiO2 / Cu2O nanocomposite is 1:0.01-1:100. The preparation method is as follows: nanometer TiO2 is taken as a crystal nucleus to induce the crystallization of Cu2O and the TiO2 / Cu2O nanocomposite is prepared by an electrochemical process, chemical deposit or hydrothermal method; the composite prepared and the inorganic coating binder are mixed evenly and coated on the surface of substrate cleaned to prepare the TiO2 / Cu2O laminated film and after the binder is totally solidified, the out-phase Fenton laminated film material is obtained. The nanometer TiO2 / Cu2O out-phase Fenton laminated film material has better effect on sterilization, algae-killing, killing cancer cell, organic pollutant degradation, and the like, and is hopefully applied to indoor sterilization for building, degrading organics cleaning coating, outdoor self-cleaning coating for building, metal antifouling coating, public sterilization coating, special sterilization coating in hospital, daily chemical products, etc.

Description

technical field [0001] The invention relates to nano-TiO with the functions of visible light sterilization, algae killing, cancer cell killing and degradation of organic pollutants, etc. 2 / Cu 2 O heterogeneous Fenton thin film and preparation method and application. It belongs to the combination of semiconductor nanomaterial composite technology and visible light catalytic oxidation technology. The obtained heterogeneous Fenton film can be used for indoor sterilization of buildings, cleaning coatings for degrading organic matter, self-cleaning coatings for building exteriors, metal antifouling coatings, bactericidal coatings in public places, Special bactericidal coatings for hospitals, daily chemical products, etc. Background technique [0002] Photooxidation technology mainly uses strong oxidants to generate hydroxyl radicals (·OH) with strong oxidizing ability to completely mineralize organic pollutants or kill bacteria and algae, which belongs to advanced oxidation te...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J21/06A61L2/14C09D5/14C09D5/16
Inventor 余颖李家麟徐芬张永刚
Owner HUAZHONG NORMAL UNIV
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