Preparation method of nano-grade titanium dioxide

A titanium dioxide, nano-scale technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of changing the particle size, regulating the crystal phase, changing its shape, etc., to achieve cheap raw materials, improved separation efficiency, and mild reaction conditions Effect

Inactive Publication Date: 2013-11-20
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the previous synthesis methods, people often only focus on simply changing the size of the particles or adjusting the difference in the crystal phase or changing the shape, and there are few reports that can combine the three at the same time.

Method used

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  • Preparation method of nano-grade titanium dioxide
  • Preparation method of nano-grade titanium dioxide
  • Preparation method of nano-grade titanium dioxide

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specific Embodiment approach 1

[0008] Specific embodiment 1: The preparation method of nano-scale titanium dioxide in this embodiment is carried out according to the following steps: adding polystyrene sulfonate to the titanium trichloride solution whose concentration is 0.01~0.06g / mL to obtain mixture A , wherein the concentration of polystyrene sulfonate in mixture A is 0.005-0.05 g / mL, then adjust the pH value to 0.1-5.0 with inorganic acid or inorganic base, and then carry out hydrothermal reaction at 110-180 °C for 0.5 ~24h, then filter or centrifuge to remove the liquid, wash the obtained solid with distilled water until the pH value is equal to 7, then wash with ethanol for 1~3 times, put it in a constant temperature blast drying oven, and keep the temperature at 60~80°C Dry for 5-12 hours; that is, nano-sized titanium dioxide is obtained.

[0009] Crystal phase and morphology table of nanoscale titanium dioxide obtained under different conditions in table 1

[0010]

[0011]

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that: the polystyrene sulfonate is sodium polystyrene sulfonate. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: This embodiment differs from Embodiment 2 in that: the average molecular weight of the sodium polystyrene sulfonate is 5,000-700,000. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention provides a preparation method of nano-grade titanium dioxide, which belongs to the field of titanium dioxide preparation. The invention aims to provide the preparation method of the nano-grade titanium dioxide. The preparation method of the invention comprises the following steps of: taking titanium trichloride as a titanium source and taking polystyrene sulfonates as a surfactant to obtain the nano-grade titanium dioxide through adjusting pH value of a reaction system and carrying out hydrothermal treatment at a temperature in a range of 110-180 DEG C for different reaction periods of time including 0.5-24 h and the like. The preparation method has the advantages of cheap raw materials, simple equipment and simplicity in operation. Products comprise nano-grade particles with a certain crystalline phase and flower-shaped titanium dioxide, which have the advantages of some excellent performances of a nano material, good product dispersibility, stable structure and high yield, so that the nano-grade titanium dioxide is applicable to large scale production and can be used for a plurality of fields including environmental catalysis, cosmetics, coating, chemical fibers and the like.

Description

technical field [0001] The invention belongs to the field of titanium dioxide preparation. Background technique [0002] In recent years, nanomaterials have developed very rapidly, and nano-titanium dioxide has increasingly become a research hotspot because of its excellent properties different from macroscopic materials. As we all know, titanium dioxide has three crystal phases in nature: rutile, anatase and brookite. It is generally believed that anatase has high photocatalytic activity, but we can see from Degussa P25 and some literature reports that, Titanium dioxide with a certain proportion of mixed phase is beneficial to the charge separation of photogenerated electrons and holes (mixed crystal effect), and can also improve the photocatalytic activity. With increasingly in-depth research, it is known that the photocatalytic activity of titanium dioxide is not only affected by its crystal phase, but also by factors such as grain size, morphology and crystallinity, esp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
Inventor 付宏刚周娟田国辉陈亚杰孟祥影
Owner HEILONGJIANG UNIV
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