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Production of multifunctional TiO2 modified light catalyst

A photocatalyst and multifunctional technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of reduced catalyst activity, increased carrier recombination centers, and unsatisfactory effects. Inhibit the effect of compounding

Inactive Publication Date: 2007-09-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ion doping can improve catalytic activity and visible light responsiveness to a certain extent, the effect is still unsatisfactory, and excessive doping will increase the number of carrier recombination centers, resulting in a decrease in catalyst activity.

Method used

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  • Production of multifunctional TiO2 modified light catalyst
  • Production of multifunctional TiO2 modified light catalyst
  • Production of multifunctional TiO2 modified light catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the amount of 0.01% (in terms of molar ratio of titanium), weigh quantitative iron nitrate (Fe(NO 3 ) 3 .9H 2 O) move into 100ml volumetric flask, add dehydrated alcohol to constant volume simultaneously, be mixed with the alcoholic solution A of iron; 5ml dehydrated alcohol is added the Ti(OBu) of 10ml 4According to the required Fe / Ti ratio, 2ml of solution A of corresponding concentration was dropped into solution B under stirring conditions to form solution C. Slowly add 10ml of 28% concentrated ammonia water into the solution C dropwise under vigorous stirring, and continue stirring for 12 hours after the dropwise addition is completed to ensure the completion of the reaction. The solution obtained after stirring was transferred to a drying oven at 105° C. for 24 h to constant weight. Transfer the powder sample into a crucible and place it in a muffle furnace, heat up to 350°C at a rate of 10°C / min and roast for 2 hours to obtain nitrogen and iron co...

Embodiment 2

[0030] According to the amount of 0.01% (in terms of molar ratio of titanium), weigh quantitative iron nitrate (Fe(NO 3 ) 3 .9H 2 O) move into 100ml volumetric flask, add dehydrated alcohol to constant volume simultaneously, be mixed with the alcoholic solution A of iron; 10ml dehydrated alcohol is added the Ti(OBu) of 10ml 4 After 60 min of sealed magnetic stirring in the solution, solution B was prepared; according to the required Fe / Ti ratio, 1ml of solution A of corresponding concentration was dropped into solution B under stirring conditions to form solution C. Slowly add 10ml of 28% concentrated ammonia water into the solution C dropwise under vigorous stirring, and continue stirring for 24 hours after the dropwise addition is completed to ensure the completion of the reaction. The solution obtained after stirring was transferred to a drying oven at 105° C. for 48 h to constant weight. Transfer the powder sample into a crucible and place it in a muffle furnace, heat u...

Embodiment 3

[0032] According to the amount of 0.01% (in terms of molar ratio of titanium), weigh quantitative iron nitrate (Fe(NO 3 ) 3 .9H 2 O) Move it into a 50ml volumetric flask, add dehydrated ethanol to constant volume at the same time, and prepare the alcohol solution A of iron; according to the required Fe / Ti ratio, add 10ml of Ti(OBu) under the stirring condition of solution A of 2ml corresponding concentration 4 After 15 minutes of sealed magnetic stirring in the preparation solution B;. Slowly add 10ml of 28% concentrated ammonia water into the solution B dropwise under vigorous stirring, and continue stirring for 6 hours after the dropwise addition is completed to ensure the completion of the reaction. The solution obtained after stirring was transferred to a drying oven at 105° C. for 48 h to constant weight. Transfer the powder sample into a crucible and place it in a muffle furnace, heat up to 400°C at a rate of 10°C / min and roast for 2 hours to obtain nitrogen and iron ...

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Abstract

A process for preparing the modified multifunctional TiO2 photocatalyst includes such steps as mixing the alcohol solution of iron nitrate with Ti(Obu)4 solution, strong stirring while slowly dripping concentrated ammonia water, continuous stirring until full reaction, baking the resultant solution at 105 deg.C until constant weight, and calcining in the crucible in muffle furnace to obtain N and Fe doped and modified TiO2 nanopolycrystals with high photocatalytic activity.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic photocatalytic materials, in particular relates to TiO 2 Preparation method of modified photocatalyst. Background technique [0002] Nano-TiO 2 As a green photocatalyst, it has excellent photoelectric properties, stable chemical properties, low cost and easy availability, and has attractive application prospects in the fields of pollution control, water photolysis, photoelectric conversion, and optical coatings. But TiO 2 Some of its own defects hinder the popularization and application, among which the prominent defects are low photon quantum efficiency and can only be excited by ultraviolet light. In order to broaden the TiO 2 The photoresponse range and the improvement of photogenerated electron-hole pairs (e - -h + ) separation efficiency, carried out a variety of research, including: dye photosensitization, semiconductor recombination, ion doping and other methods. [0003] Dye ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/24
Inventor 陈东辉张建洲陈亮
Owner DONGHUA UNIV
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