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Method for preparing pure rutile-phase titanium dioxide single crystalline nanorod without template in low temperature

A titanium dioxide, single crystal nanotechnology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of local agglomeration of crystals or changes in morphology, reduction of surface hydroxylation, and low photocatalytic activity of products. problem, to achieve the effect of stable photocatalytic properties, easy operation and convenient large-scale production

Inactive Publication Date: 2009-10-07
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor crystal dispersion, easy agglomeration of particles, reduced specific surface area, reduced surface hydroxylation degree and low photocatalytic activity of the product in the existing method for preparing rutile phase titanium dioxide nanorods during high temperature heat treatment. However, when the external template or crystal growth inhibitor is removed, there will be problems that the organic matter is difficult to be completely eluted and the local agglomeration of the crystal or the change of the shape, and the template-free low temperature preparation of pure rutile phase titanium dioxide single crystal nanorods is provided. method

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  • Method for preparing pure rutile-phase titanium dioxide single crystalline nanorod without template in low temperature
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  • Method for preparing pure rutile-phase titanium dioxide single crystalline nanorod without template in low temperature

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specific Embodiment approach 1

[0008] Specific embodiment 1: In this embodiment, the method for preparing pure rutile phase titanium dioxide single crystal nanorods at low temperature without template is carried out according to the following steps: 1. Add the precursor of titanium to the alcohol, and prepare the concentration of the precursor of titanium at 0.1-0.5 mol / L solution; 2. Take 10-50mL step 1 solution, add it dropwise to 20-100mL distilled water at room temperature under stirring condition, after the dropwise addition, the water bath is heated to 60-80°C and continue stirring for 40-140min, then add 50 ~300mL alkali solution with a concentration of 0.5~5.0mol / L, seal it and stir it at 60~80℃ for 4~12 hours; 3. The stirred solution is centrifuged to obtain a precipitate, and then washed with distilled water until the pH value of the effluent 6-7; 4. Dissolve the washed precipitate in 60-260 mL of acid solution with a concentration of 0.3-3.0 mol / L, seal and stir at 60-80°C for 4-12 hours to obtai...

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, a solution with a concentration of 0.2-0.4 mol / L is prepared. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0011] Embodiment 3: This embodiment differs from Embodiment 1 in that in step 1, a solution with a titanium precursor concentration of 0.3 mol / L is prepared. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

A method for preparing pure rutile-phase titanium dioxide single crystalline nanorod without template in low temperature relates to a method for preparing rutile-phase titanium dioxide single crystalline nanorod. The invention settles a problem that the requirements of high-temperature treatment and additionally adding of template agent or crystal growing inhibitor existing in the prior method for preparing rutile-phase titanium dioxide crystalline nanorod. The method comprises the following steps: 1. adding the precursor of titanium into alcohol for preparing solution; 2. dripping the solution into distilled water, mixing after adding the alkaline solution; 3. centrifugating for obtaining precipitate after mixing, washing the precipitate; 4. after dissolving the washed precipitate into the acid solution, mixing for obtaining slurry liquid; and 5. after centrifugating the slurry liquid, obtaining the pure rutile-phase titanium dioxide single crystalline nanorod. The method for preparing pure rutile-phase titanium dioxide single crystalline nanorod is executed in normal pressure and low temperature and has no requirement for adding any template agent or crystal growth inhibitor. The product of the invention has the advantages of high crystallinity degree, good dispersibility, bigger specific surface area and surface hydroxylation degree, and stable photocatalysis characteristic.

Description

technical field [0001] The invention relates to a method for preparing pure rutile phase titanium dioxide single crystal nanorods. Background technique [0002] Titanium dioxide photocatalyst has become the most ideal catalyst in environmental treatment because of its advantages of low price, non-toxicity, high catalytic activity, strong oxidation ability, good chemical stability, wear resistance and recyclability. TiO 2 Among the three morphologies (ie, brookite, anatase, and rutile), anatase and rutile are the most widely used. Compared with the two, the rutile phase is more stable and dense, and has higher hardness, density, dielectric constant and refractive index, and is more active as a photocatalyst and electrode material, especially the rutile phase with a certain high aspect ratio Nanorods can show more advantages; nanorods are one-dimensional nanomaterials, which are the smallest dimensional structure for effective electron transport and light excitation, and are...

Claims

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Application Information

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IPC IPC(8): C30B29/16C30B29/62C30B7/14C01G23/053B01J37/03B01J21/06
Inventor 王靖宇韩喜江胡宜栋苏丹刘磊杜耘辰
Owner HARBIN INST OF TECH
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