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Method for preparing anatase-TiO2 porous microspheres

A technology of titanium dioxide and porous microspheres, which is applied in the directions of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complicated production process of porous microspheres, high temperature in the preparation process, and expensive precursors, etc., and achieves operability and repeatability. It has strong properties, low hydrothermal reaction temperature, and the effect of improving photocatalytic activity.

Inactive Publication Date: 2011-04-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention is in order to solve existing TiO 2 The production process of porous microspheres is complex, the temperature of the preparation process is high, the precursors used in the production are expensive, highly toxic, and the TiO obtained 2 Porous microspheres are rutile-type problems, and a method for preparing anatase-type titanium dioxide porous microspheres is provided

Method used

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  • Method for preparing anatase-TiO2 porous microspheres
  • Method for preparing anatase-TiO2 porous microspheres
  • Method for preparing anatase-TiO2 porous microspheres

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specific Embodiment approach 1

[0010] Embodiment 1: The method for preparing anatase titanium dioxide porous microspheres in this embodiment is carried out according to the following steps: 1. Dissolve 0.16 to 0.2 parts of titanium sulfate dihydrate into 48 to 52 parts of distilled water according to the ratio of parts by weight Obtain titanium sulfate dihydrate solution; 2. Put the titanium sulfate dihydrate solution into a polytetrafluoroethylene high-pressure tank, and then move the polytetrafluoroethylene high-pressure tank into a blast oven at 115-125°C for drying for 45-52 hours. The white precipitate obtained after natural cooling to room temperature; 3. Wash the white precipitate alternately with distilled water and absolute ethanol for 2 to 10 times, and then dry the white precipitate at 55 to 63°C for 6 to 10 hours to obtain anatase Mineral-type titanium dioxide porous microspheres.

[0011] The concentration of the titanium sulfate dihydrate solution in Step 1 of this embodiment is 0.014-0.016M. ...

specific Embodiment approach 2

[0015] Embodiment 2: This embodiment differs from Embodiment 1 in that the titanium sulfate dihydrate in step 1 is chemically pure. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0016] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, 0.18 parts of titanium sulfate dihydrate is dissolved in 50 parts of distilled water according to the ratio of parts by weight. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method for preparing porous microspheres, in particular to a method for preparing anatase-TiO2 porous microspheres. The method solves the problems that the existing TiO2 porous microsphere has complex manufacturing process, high temperature during the preparation process, high price of the precursor used in the manufacturing process, high toxicity, and manufactured TiO2porous microsphere is rutile type. The method comprises the following steps: firstly, preparing dihydrate titanous sulfate solution; secondly, performing natural cooling after drying to obtain white precipitate; and thirdly, performing alternate cleaning with distilled water and absolute ethyl alcohol, and then performing drying to obtain the anatase-TiO2 porous microspheres. The preparation method has the advantages that the process is simple, the temperature is low during the preparation process, of the precursor used in the manufacturing process is low in price and nontoxic, the obtained TiO2 porous microspheres are anatase type and the organic matter in the water body is easy to be removed.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide porous microspheres. Background technique [0002] Nano-TiO 2 Photocatalytic oxidation technology is an effective method to remove organic pollution in water environment. But nanoscale TiO 2 It is easy to lose and difficult to recycle. Although the problem of catalyst recovery can be solved by loading large-volume materials, nano-TiO 2 After being loaded, the surface area is greatly reduced, so that the photocatalytic activity is greatly reduced. At the same time, the loading is only a simple physical adsorption process, and it is easy to fall off during repeated use. These unfavorable factors make nano-TiO 2 The application of photocatalytic oxidation technology in practical engineering is restricted. [0003] In recent years, three-dimensional nanostructured TiO 2 Because of its low density, large specific surface area, and large size, it has high catalytic activity, and its micro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
Inventor 陈忠林叶苗苗刘小为陈文辉周楠
Owner HARBIN INST OF TECH
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