Rutile crystal form titanium oxide having hierarchical structure, and preparation method and use thereof

A hierarchical structure, titanium oxide technology, applied in titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of violent reaction, thick and short nano branches, compressed specific surface area, etc. The effect of increased surface area

Active Publication Date: 2013-04-24
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are deficiencies in both the obtained product and its preparation method. First, although the product is a spherical shape with cave-like pits composed of nano-twigs, it is too dense and interconnected and spliced. The specific surface area is greatly reduced, and the too few and too small cave-like pits, and the too thick and short of the nano-twigs further compress the specific surface area; secondly, the preparation method can neither make a product with a higher specific surface area, And because the precursor of raw material titanium is titanium tetrachloride, when preparing its aqueous solution, it not only reacts violently, but also produces toxic gas hydrogen chloride, causing pollution to the environment. The defect of 3-day reaction in a reactor at 130°C is not only energy-consuming, but also time-consuming

Method used

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  • Rutile crystal form titanium oxide having hierarchical structure, and preparation method and use thereof
  • Rutile crystal form titanium oxide having hierarchical structure, and preparation method and use thereof
  • Rutile crystal form titanium oxide having hierarchical structure, and preparation method and use thereof

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Effect test

Embodiment 1

[0031] The concrete steps of preparation are:

[0032] Step 1, firstly mix hydrated titanyl sulfate, ethanol, glycerin and deionized water according to the molar ratio of 1:16:15:15 and then stir for 1 hour to obtain a mixed solution. Then the mixed solution was placed in a closed state, and reacted at a temperature of 140° C. for 38 hours to obtain a reaction mixture.

[0033] In step 2, wait for the reaction mixture to cool naturally to room temperature, then remove the upper liquid of the reaction mixture, and then wash the obtained precipitate with industrial alcohol for 3 times. Afterwards, it was dried at 75°C for 2 hours to obtain a figure 1 shown, and as figure 2 and image 3 The hierarchical structure shown in the curve in the rutile crystal form of TiO.

Embodiment 2

[0035] The concrete steps of preparation are:

[0036] Step 1: first mix hydrated titanyl sulfate, ethanol, glycerin and deionized water according to a molar ratio of 1:18.5:14:16, and then stir for 1.3 hours to obtain a mixed solution. Then the mixed solution was placed in a sealed state, and reacted at a temperature of 145° C. for 36 hours to obtain a reaction mixture.

[0037] In step 2, wait for the reaction mixture to cool naturally to room temperature, then remove the upper liquid of the reaction mixture, and then wash the obtained precipitate with industrial alcohol for 3 times. Afterwards, it was dried at 78°C for 1.8h to obtain a figure 1 shown, and as figure 2 and image 3 The hierarchical structure shown in the curve in the rutile crystal form of TiO.

Embodiment 3

[0039] The concrete steps of preparation are:

[0040] Step 1: first mix hydrated titanyl sulfate, ethanol, glycerin and deionized water according to a molar ratio of 1:21:12.5:17.5, and then stir for 1.5 hours to obtain a mixed solution. Then the mixed solution was placed in a closed state, and reacted at a temperature of 150° C. for 34 hours to obtain a reaction mixture.

[0041] In step 2, wait for the reaction mixture to cool naturally to room temperature, then remove the upper liquid of the reaction mixture, and then wash the obtained precipitate with industrial alcohol for 4 times. After that, it was dried at 80°C for 1.5h to obtain the following figure 1 shown, and as figure 2 and image 3 The hierarchical structure shown in the curve in the rutile crystal form of TiO.

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Abstract

The invention discloses a rutile crystal form titanium oxide having a hierarchical structure, and a preparation method and a use thereof. Titanium oxide is many rutile phase titanium oxide micrometer hollow balls with the surfaces being standing mono-crystalline nanorods and the side surfaces being open, wherein the specific surface area of the micrometer hollow balls is not less than 224.4m<2>/g, the ball diameter is 2-3mum, the diameters of the mono-crystalline nanorods are in a range of 5-8nm, and the rod length is not less than 200nm. The preparation method comprises the following steps: mixing titanyl sulfate hydrate, ethanol, glycerin and deionized water according to a molar ratio of the titanyl sulfate hydrate to ethanol to glycerin to the deionized water of 1:16-26:10-15:15-20, stirring for at least 1h to obtain a mixed solution, placing the mixed solution in a closing state, reacting at 140-160DEG C for at least 30h to obtain a reaction mixture, removing the supernatant of the reaction mixture, cleaning the obtained sediment by industrial alcohol at least 3 times, and drying the cleaned sediment at 75-85DEG C for at least 1h to obtain the rutile crystal form titanium oxide having a hierarchical structure. The rutile crystal form titanium oxide having a hierarchical structure can be widely used in chromium polluted solutions for photo-catalytic degradation adsorption.

Description

technical field [0001] The invention relates to a titanium oxide, its preparation method and application, in particular to a hierarchical structure rutile crystal form titanium oxide, its preparation method and application. Background technique [0002] Titanium oxide has shown good biological and chemical inertness, strong oxidation performance, low cost, and stability to photocorrosion and chemical corrosion in environmental treatment, and has become a functional material with excellent adsorption and photocatalytic properties. Titanium oxide nanomaterials are very easy to adsorb heavy metal ions due to their larger specific surface area and rich unsaturated bonds in surface atoms, as well as their inherent chemical activity and tiny size, so that they can be more effectively absorbed and degraded. Removes contaminants from aqueous solutions. With the continuous reduction of the size of titanium oxide nanomaterials, although its specific surface area will be greatly incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B01J20/06B01J21/06C02F1/28C02F1/30C02F1/72C02F101/22
Inventor 许思超王拴张云霞李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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