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Metallic ion doped nano TiO2 transparent photo-catalytic emulsion and preparation method thereof

A technology of metal ions and photocatalysts, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor emulsion dispersion, high energy consumption, and high production costs, and achieve dispersion and stability Good, easy to store, good stability

Inactive Publication Date: 2007-10-31
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of nano-titanium dioxide photocatalyst emulsion at home and abroad is mostly an emulsion made of nano-titanium dioxide powder through special processing. Due to the serious agglomeration of nano-powder, it is very difficult to redisperse and consumes high energy. Therefore, the emulsion prepared by this process Poor dispersion and poor stability
There are also emulsions directly synthesized by chemical methods, which have better dispersibility and stability, but titanium dioxide is a wide bandgap material (3.2eV), which can only absorb the ultraviolet part of the solar spectrum, and usually needs to be excited by an ultraviolet light source. Low (less than 5% of ultraviolet light in the solar spectrum), which limits its practical application
However, due to the high production cost of the sol-gel method, it is difficult to achieve large-scale production

Method used

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  • Metallic ion doped nano TiO2 transparent photo-catalytic emulsion and preparation method thereof
  • Metallic ion doped nano TiO2 transparent photo-catalytic emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) At room temperature, measure 7.5 mL of titanium tetrachloride with a graduated cylinder, and slowly drop it into 40 mL of distilled water to obtain a clear and transparent solution;

[0028] (2) Add 0.2% ammonium metavanadate to the transparent solution obtained above, stir until it is completely dissolved, then add pure water until the solution is 500ml, then add concentrated ammonia water to the solution, adjust the pH value to 7, produce a large amount of dilute yellow precipitate;

[0029] (3) Vacuum filter the above precipitate and wash it with deionized water until it is checked by silver nitrate solution that it does not contain Cl. - So far, TiO doped with vanadium 0.2% (the molar ratio of doped metal ions to titanium) has been obtained 2 filter cake;

[0030] (4) Add water to the above-mentioned filter cake 10-100 times to make a slurry, cut it with a high-speed shearing machine for 50 minutes, place it in a round bottom flask, add 30ml of 30% hydrogen pe...

Embodiment 2

[0033] (1) Dissolve 0.234 gram of ammonium metavanadate in 250 ml of water, and stir until completely dissolved;

[0034] (2) At room temperature, take 10.89ml of titanium tetrachloride with a graduated cylinder, slowly drop it into the above solution with a separatory funnel, to obtain a clear and transparent solution, add pure water until the solution is 1000ml;

[0035] (3) Add concentrated ammonia water to the above solution, adjust the pH value to 6, produce a large amount of light yellow precipitate, vacuum filter the precipitate, wash it with deionized water until it is tested with silver nitrate solution to not contain Cl - So far, TiO doped with vanadium 2% (the molar ratio of doped metal ions to titanium) has been obtained 2 filter cake;

[0036](4) Add water to the above-mentioned filter cake 10-100 times to make a slurry, cut it with a high-speed shearing machine for 50 minutes, place it in a round bottom flask, add 90ml of 30% hydrogen peroxide, stir and react at...

Embodiment 3

[0039] (1) Dissolve 0.70 gram of tin tetrachloride in 250 ml of water, stir until completely dissolved;

[0040] (2) At room temperature, take 10.89ml of titanium tetrachloride with a graduated cylinder, slowly drop it into the above solution with a separatory funnel, to obtain a clear and transparent solution, add pure water until the solution is 1000ml;

[0041] (3) Add concentrated ammonia water to the above solution, adjust the pH value to 8, produce a large amount of white precipitate, vacuum filter the precipitate, wash it with deionized water until it is tested to be free of Cl with silver nitrate solution - So far, TiO doped with 2% tin (the molar ratio of doped metal ions to titanium) has been obtained. 2 filter cake;

[0042] (4) The above-mentioned filter cake is beaten, and after being cut with a high-speed shearer for 50 minutes, it is placed in a round-bottomed flask, and 90ml of 30% hydrogen peroxide is added, and stirred and reacted for 48 hours at 5° C., fina...

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Abstract

The metal ion mixed with TiO2 transparent optical catalyst lotion features in 0. 5-10% TiO2, mixed with V, Tin, Zn, Fe, OP emulsifier 1-10% with the rest being water, comprising a making of titanic chloride water solution, hydrolysis to generate TiO2+, VO3+, Sn4+, Zn2+, Fe3+ or Ce3+ compound oxidation deposit, low temperature complexing, hydrolysis to get the metal mixed nanometer TiO2 transparent catalyst lotion. It uses cheap titanium tetrachloride and ammonium vanadate, white copperas, Fe2cl3,tin tetrachloride as the inorganic material, using low temperature complex hydrolysis to allow higher ability to mix, expanding spectral response zone. Its maximum advantage is the direct use of sun light or fluorescent lamp, realizing complete degradation of organic pollutants, improving the speed and efficiency of photochemical catalysis and degradation for environmental purification.

Description

technical field [0001] The invention relates to a metal ion doped nano TiO 2 The transparent photocatalyst emulsion and its preparation method belong to the technical field of chemical synthesis and refining. Background technique [0002] In recent years, a large number of synthetic materials and automobile manufacturing materials used in home decoration have caused great pollution to the living environment. Photocatalytic oxidation treatment technology, as a new type of pollution control method, can finally degrade pollutants into non-toxic and harmless Inorganic small molecules can thoroughly purify the environment. Nano-scale titanium dioxide photocatalyst, which is widely studied at present, is the most potential photocatalytic oxidation material in the world today, and can be applied to deal with various environmental problems. However, nano-titanium dioxide powder is prone to agglomeration during storage, and it is difficult to recycle during photocatalysis. Because ...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 丁士文李玲丁宇袁志卿
Owner HEBEI UNIVERSITY
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