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Supported nanometer crystalline titania photocatalyst and its prepn process

A nano-grain, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes and other directions, can solve the problems of poor process strength and high preparation cost, achieve high utilization rate, short preparation time, The effect of less raw material consumption

Inactive Publication Date: 2006-10-18
TIANJIN GUARD T & D
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carrier is aluminum oxide balls, and the method is to directly carry out nano-TiO on the surface of aluminum oxide beads by sol-gel method. 2 The loading of the thin film, the preparation of a strong TiO 2 Photocatalyst, thereby overcoming the shortcomings of high preparation cost and complicated process or poor strength

Method used

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  • Supported nanometer crystalline titania photocatalyst and its prepn process
  • Supported nanometer crystalline titania photocatalyst and its prepn process

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The commercially available specific gravity is 0.5g / cm 3 1000g of aluminum oxide balls with a particle size of 0.5mm were soaked in 5% hydrochloric acid solution for 10 hours, washed three times with distilled water after taking them out, and after air-drying, put them in an oven at 50 It is roasted at ℃ for 5 hours, and after drying, it becomes the treated alumina pellet carrier.

[0024] With butyl titanate as the precursor, the volume ratio of the components in the precursor solution is: butyl titanate: ethanol: water: diethanolamine: acetic acid = 1:1:1.5:0.1:0.01, the order of adding the five substances Method: first add 150ml of water to 100ml of ethanol solution, add 1ml of acetic acid and 10ml of diethanolamine at the same time as a stabilizer under stirring conditions, and finally add 100ml of butyl titanate dropwise to the above mixed solution, and dissolve the solution under airtight conditions After standing for 2 days, a stable and transparent precursor so...

Embodiment 2

[0027] The commercially available specific gravity is 2.5g / cm 3 , 1000g of aluminum oxide pellets with a particle size of 1.0mm were soaked in 10% hydrochloric acid solution for 5 hours, washed three times with distilled water after taking them out, and after air drying, put them in an oven at 100 It is roasted at ℃ for 2.5 hours, and after drying, it becomes the treated aluminum oxide pellet carrier.

[0028]With tetraethyl titanate as the precursor, the volume ratio of the components in the precursor solution is: tetraethyl titanate: ethanol: water: diethanolamine: acetic acid = 1:8:4:0.4:0.02, the five substances The adding sequence is as follows: first add 400ml of water to 800ml of ethanol solution, then add 2ml of acetic acid and 40ml of diethanolamine as stabilizers while stirring, and finally add 100ml of tetraethyl titanate dropwise into the above mixed solution, The solution was left to stand for 5 days to obtain a stable and transparent precursor sol.

[0029] Spr...

Embodiment 3

[0031] The commercially available specific gravity is 5g / cm 3 , 1000g of aluminum oxide pellets with a particle size of 2.0mm are soaked in 15% hydrochloric acid solution for 2 hours, washed three times with distilled water after being taken out, and after being air-dried, put them in an oven at 200 It is roasted at ℃ for 1 hour, and after drying, it becomes the treated alumina pellet carrier.

[0032] With isopropyl titanate as the precursor, the volume ratio of each component in the precursor solution is: isopropyl titanate: ethanol: water: diethanolamine: acetic acid = 1: 15: 6.5: 0.9: 0.05, the five substances The order of addition is: first add 650ml of water to 1500ml of ethanol solution, add 5ml of acetic acid and 90ml of diethanolamine at the same time as a stabilizer under stirring conditions, and finally add 100ml of isopropyl titanate to the above mixed solution drop by drop. The solution was left to stand for 8 days to obtain a stable and transparent precursor sol...

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Abstract

The present invention relates to titania catalyst, and is supported nanometer crystalline titania photocatalyst and its preparation process. The supported nanometer crystalline titania photocatalyst consists of alumina pellet carrier of specific weight 0.5-5.0 g / cu cm and grain size 0.5-2.0 mm and nanometer crystalline TiO2 coating. The preparation process includes the following steps: preparing carrier, preparing precursor solution; and supporting. The alumina pellet carrier of the present invention has different pore sizes, low cost and high strength, and is suitable for industrial application.

Description

technical field [0001] The technical solution of the invention relates to a titanium dioxide catalyst, specifically a supported nano-crystalline titanium dioxide photocatalyst and a preparation method thereof. Background technique [0002] Since the end of the 1970s, there have been research reports on the treatment of various types of sewage by semiconductor photocatalysts at home and abroad. The degradation objects involve phenols, dyes, hydrocarbons, surfactants, organic pigments, halogenated aromatic compounds, polycyclic Aromatic hydrocarbons, pesticides and other organic compounds and some inorganic compounds. Among them, nano-TiO 2 The powder has the characteristics of high chemical stability, light corrosion resistance, insoluble, non-toxic, and because of its deep valence band energy level, some compounds that are difficult to degrade by chemical or biological methods can pass through TiO 2 Photocatalytic degradation of mineralization into water and CO 2 . This ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/04
Inventor 张保龙董轶望张育英郭先芝谢伟王淑芳
Owner TIANJIN GUARD T & D
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