Preparation of graduated nano-structural transition metal oxide by two-phase solvent soft interface process

A technology of transition metals and nanostructures, applied in the direction of titanium oxide/hydroxide, vanadium oxide, titanium dioxide, etc., can solve the problems of low solar energy utilization and achieve good versatility, high photocatalytic activity, and simple synthesis routes

Inactive Publication Date: 2009-02-11
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, titanium dioxide has a wide band gap (Eg=3.2eV), and only sunlight with a shorter wavelength (λ≤387 nanometers) can be absorbed, and this part of ultraviolet light (300-400 nanometers) only accounts for the sunlight energy reaching the ground. 4% to 6% of the solar energy utilization rate is very low

Method used

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  • Preparation of graduated nano-structural transition metal oxide by two-phase solvent soft interface process
  • Preparation of graduated nano-structural transition metal oxide by two-phase solvent soft interface process
  • Preparation of graduated nano-structural transition metal oxide by two-phase solvent soft interface process

Examples

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Effect test

Embodiment 1

[0029] Preparation of hierarchical nanostructured titania. The preparation steps are:

[0030] Step 1, adding hydrochloric acid in 50 milliliters of water, the pH value of adjusting solution is 1;

[0031] Step 2, adding titanium tetrachloride dropwise to the prepared solution in step 1 to form a titanium-containing aqueous solution with a concentration of 0.1 mol / liter;

[0032] Step 3, add 20 milliliters of chloroform to the prepared solution in step 2;

[0033] Step 4, solvent heat treatment is carried out in the solution prepared in step 3, the temperature is 100° C., and the time is 36 hours;

[0034] Step 5, after the reaction is finished, the solid product is filtered, and the product is rinsed with distilled water or ethanol several times;

[0035] Step 6, the product was dried under vacuum at 60° C. for 12 hours to obtain white titanium dioxide powder.

[0036] The SEM image of the titanium dioxide powder is shown in figure 2 .

[0037] It can be seen from the ...

Embodiment 2

[0039] Preparation of hierarchical nanostructured titania. The preparation steps are:

[0040] Step 1, adding nitric acid in 50 milliliters of water, the pH value of adjusting solution is 2;

[0041] Step 2, adding titanium tetrachloride dropwise to the prepared solution in step 1 to form a titanium-containing aqueous solution with a concentration of 0.02 mol / liter;

[0042] Step 3, add 4 milliliters of chloroform to the prepared solution in step 2;

[0043] Step 4, solvent heat treatment is carried out in the solution prepared in step 3, the temperature is 100° C., and the time is 36 hours;

[0044] Step 5, after the reaction is finished, the solid product is filtered, and the product is rinsed with distilled water or ethanol several times;

[0045] Step 6, the product was dried under vacuum at 60° C. for 12 hours to obtain white titanium dioxide powder.

[0046] The SEM image of the titanium dioxide powder is shown in figure 2 .

Embodiment 3

[0048] Preparation of hierarchical nanostructured titania. The preparation steps are:

[0049]Step 1, adding nitric acid in 50 milliliters of water, the pH value of adjusting solution is 2;

[0050] Step 2, adding titanium tetrachloride dropwise to the prepared solution in step 1 to form a titanium-containing aqueous solution with a concentration of 0.001 mol / liter;

[0051] Step 3, add 4 milliliters of chloroform to the prepared solution in step 2;

[0052] Step 4, performing solvent heat treatment in the solution prepared in step 3, the temperature is 100°C, and the time is 96 hours;

[0053] Step 5, after the reaction is finished, the solid product is filtered, and the product is rinsed with distilled water or ethanol several times;

[0054] Step 6, the product was dried under vacuum at 100° C. for 3 hours to obtain white titanium dioxide powder.

[0055] The SEM image of the titanium dioxide powder is shown in figure 2 .

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Abstract

The present invention provides a preparation method of gradate nanostructure transition metal oxide by a two phase solvent soft interface method which comprises the steps of that: metal salt or metal oxide is added into water, and the pH value of the solution is adjusted by acid or base, then the corresponding reactant precursor is obtained; another water insoluble organic solvent is added into the solution, and the whole mixture is subjected to solvothermal treatment, and then the solid product is obtained by pumping filter, finally, the corresponding gradate nanostructure transition metal oxide is obtained after scrubbing and drying. The transition metal oxide of the present invention has excellent gradate structure, for example, titanium dioxide has a main structure of micron order spheroidal particle which is formed by the ordered array of a plurality of nanorods. The titanium dioxide of the present invention has a high visible light photocatalysis activity, a simple synthetic route, an easy technology, available raw material, low cost and high yield, and is adapted to mass production.

Description

technical field [0001] The invention relates to a two-phase solvent soft interface method for synthesizing transition metal oxides with hierarchical nanostructures. The transition metal oxides include titanium dioxide, copper oxide, zinc oxide, nickel oxide, tricobalt tetroxide and vanadium pentoxide. The obtained titanium dioxide It has high visible light photocatalytic activity. Background technique [0002] At present, the research work on zero-dimensional nanoparticles and one-dimensional nanomaterials has been carried out very deeply. How to self-assemble unit nanomaterials (nanocrystals, nanowires, and nanotubes, etc.) into nanomaterials with hierarchical ordered structures, It is an important link to realize the functionalization of nanosystems or nanodevices. The particularity of this hierarchical and ordered structure may lead to differences in the physical properties of assembled materials and constituent units in terms of electricity, magnetism, and light, thus en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G3/02C01G9/02C01G53/04C01G51/04C01G31/02
Inventor 张礼知许华贾法龙艾智慧
Owner HUAZHONG NORMAL UNIV
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