Microwave process and application of foamed nickel supported and modified nanometer TiO2

A nickel foam and nanotechnology, applied in separation methods, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of no research reports on the preparation process of photocatalysts retrieved

Inactive Publication Date: 2007-01-03
JIANGSU PROVINCIAL CENT FOR DISEASE PREVENTION & CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, no research has been found on the application of microwave heating technology to nano-TiO 2 Research report on the preparation process of photocatalyst

Method used

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  • Microwave process and application of foamed nickel supported and modified nanometer TiO2
  • Microwave process and application of foamed nickel supported and modified nanometer TiO2
  • Microwave process and application of foamed nickel supported and modified nanometer TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Add 25mL of butyl titanate into 8mL of isopropanol, and mix well; then prepare 200mL of deionized aqueous solution containing 2mL of 70wt% nitric acid, and add silver nitrate [AgNO 3 ], where the Ag / Ti mass ratio is 1.5%, add 0.5mL acetylacetone chelating agent, 1.0g polyethylene glycol (PEG1500) organic polymer; Slowly add 1 drop into the aqueous solution, while controlling the temperature of the reaction solution at about 70°C with a constant temperature water bath, until the butyl titanate is completely hydrolyzed. Then adjust the pH value to 3, continue stirring for 12 hours, peptize and age at room temperature for 24 hours, and finally form transparent TiO 2 Sol.

[0031] Soak 2 metal nickel foam plates cleaned by ethanol ultrasonic cleaning in the prepared TiO 2 In the sol, pull it out at a speed of 5mm / s and dry it in a blast drying oven at 80°C for 15min, repeat the above process twice, put the dried and coated foam nickel plate into the American PHOENIX mi...

Embodiment 2

[0034] With the same TiO as in Example 1 2 Sol preparation method, the difference is that lanthanum nitrate [La(NO 3 ) 3 ·nH 2 O], wherein the La / Ti mass ratio is 1.0%, the same photocatalytic degradation experiment is carried out, and the concentration of formaldehyde after 90 minutes of reaction is 0.12mg / m 3 , the degradation rate is 89%; the initial concentration of VOCs is 4.04mg / m 3 , the VOCs concentration was 0.82mg / m after 90 minutes of reaction 3 , The degradation rate is 80%.

Embodiment 3

[0036] With the same TiO as in Example 1 2 Sol preparation method, the difference is that lanthanum nitrate [La(NO 3 ) 3 ·nH 2 O], wherein the La / Ti mass ratio is 1.5%, the photocatalytic degradation experiment is also carried out, and the formaldehyde concentration after 90 minutes of reaction is 0.06mg / m 3 , the degradation rate is 94%; the initial concentration of VOCs is 4.08mg / m 3 , the concentration of VOCs was 0.54mg / m after 90 minutes of reaction 3 , The degradation rate is 87%.

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Abstract

The present invention discloses microwave heating process for preparing nanometer TiO2 photocatalyst, and the nanometer TiO2 photocatalyst is modified through mixing metal ion and supported with foamed nickel when used in degrading formaldehyde gas and volatile organic matter. Transparent TiO2 sol is prepared through hydrolyzing organic titanium precursor with alkoxyl titanium or through treating inorganic titanium precursor in a coprecipitation-peptization process, and during the preparation, AgNO3 and La(NO3)3 .nH2O in different ratios are added. After loaded on foamed nickel plate as carrier, the TiO2 sol is calcined at 250 deg.c under air atmosphere inside a muffle furnace for 1 hr to obtain foamed nickel plate with supported modified nanometer TiO2 photocatalyst. The present invention has high photocatalysis efficiency, and may be used in degrading formaldehyde gas and volatile organic matter in the air effectively.

Description

technical field [0001] The invention belongs to the fields of chemistry, chemical engineering and environmental protection, in particular to a modified nano-TiO loaded on metal foam nickel by using microwaves. 2 The preparation method of the photocatalyst can effectively remove the pollution of formaldehyde and volatile organic pollutants (VOCs) in indoor air. Background technique [0002] Since the discovery of nano-TiO in 1972 2 Since the photocatalytic phenomenon, nanophotocatalytic technology has been developed rapidly, with the advantages of mild reaction conditions, low energy consumption, less secondary pollution, and the ability to oxidize and decompose organic compounds with stable structures at normal temperature and pressure. The heterogeneous photocatalytic oxidation technology has always attracted the attention of researchers. Studies in recent years have shown that many refractory organic pollutants, such as halogenated hydrocarbons, organophosphorus compound...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J23/10B01J21/06B01J37/02B01D53/62B01D53/72B01D53/86
Inventor丁震陈晓东陈连生林萍
OwnerJIANGSU PROVINCIAL CENT FOR DISEASE PREVENTION & CONTROL