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Method for preparing titanium dioxide hollow spherical powder

A hollow spherical, nano-sized titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of uneven particle size, long production cycle, wide distribution, etc., and achieve small environmental pollution and uniform particle size distribution , Wide adjustable range of effects

Inactive Publication Date: 2012-07-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although there are many methods for preparing titanium dioxide powder, such as chemical co-precipitation, sol-gel method, hydrothermolysis, reverse micellar method, hydrothermal synthesis, chemical vapor deposition, etc., among them, wet chemical methods such as chemical co-precipitation vary depending on the process. The process is simple and widely used, but there are disadvantages such as uneven particle size and wide distribution of powder, long production cycle, high energy consumption and serious pollution due to the difficulty in controlling the precipitation process.

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  • Method for preparing titanium dioxide hollow spherical powder
  • Method for preparing titanium dioxide hollow spherical powder
  • Method for preparing titanium dioxide hollow spherical powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare TiCl according to the molar concentration of 0.1M 4 The 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid solution was ultrasonically dispersed to form a brownish-red solution; 6ml of TiCl was measured at a volume ratio of 2:3 4 solution and 9ml deionized water. TiCl with higher density 4 The ionic liquid solution was added to a 25ml sample bottle, and then deionized water was slowly added, and there was an obvious interface between the two liquids. The temperature was kept at 288K. After 2 hours, white turbidity was formed, and the precipitate gradually penetrated into the ionic liquid layer. After 24 hours, the liquid still separated after the precipitate settled. Take out the upper layer colorless solution and the lower layer light red solution respectively. The measured pH value of the upper layer solution is less than 1, and the imidazolium salt content of the lower layer solution is relatively high, and the measured pH value is about 1. The lo...

Embodiment 2

[0039] Prepare TiCl according to the molar concentration of 0.5M 4 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid solution, ultrasonically dispersed to form a brownish-red solution; 9ml of TiCl was measured at a volume ratio of 3:2 4 solution and 6ml deionized water. TiCl with higher density 4The ionic liquid solution was added to a 25ml sample bottle, and then deionized water was slowly added, and there was an obvious interface between the two liquids. The temperature was kept at 288K, white turbidity was formed after 2 hours, and the precipitate gradually penetrated into the ionic liquid layer. After 34 hours, the hydrolysis was complete. After the precipitation settled, the upper layer of colorless solution and the lower layer of light red solution were taken out, and the lower layer solution was left for recycling. The white precipitate was separated by centrifugation and washed with water until AgNO 3 Detection without Cl - , washed with alcohol for the la...

Embodiment 3

[0041] Prepare TiCl according to the molar concentration of 1.0M 4 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid solution, ultrasonically dispersed to form a brownish-red solution; 9ml of TiCl was measured at a volume ratio of 3:2 4 solution and 6ml deionized water. TiCl with higher density 4 The ionic liquid solution was added to a 25ml sample bottle, and then deionized water was slowly added, and there was an obvious interface between the two liquids. The temperature was kept at 288K, and the hydrolysis was complete after 46 hours. After the precipitation settled, the upper layer of colorless solution and the lower layer of light red solution were taken out respectively, and the lower layer solution was left for recycling. The white precipitate was separated by centrifugation and washed with water until AgNO 3 Detection without Cl - , washed with alcohol for the last time, and then the precipitate was dried in an oven at a temperature of 325K for a holding t...

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Abstract

The invention discloses a method for preparing titanium dioxide hollow spherical powder, belonging to the technical field of material powder preparation. The method comprises the following steps: firstly, TiCl4 is added into ion liquid with a proper amount; the mixture is stirred uniformly with ultrasonic; deionized water is slowly added, wherein water is in the upper layer; after a period of time, water gradually enters an ion liquid layer to hydrolyze the TiCl4 to obtain a deposit; because the obtained solution has lamination phenomenon, liquid at the upper layer is separated according to colors, and the ion liquid can be repeatedly utilized; and the deposit is washed by the deionized water and ethanol, separated by centrifugation, dried and baked to obtain the titanium dioxide hollow spherical powder with favorable dispersivity. The method has the advantages of simple and easily controlled process parameters, uniform and adjustable granularity, resource saving, little pollution, and the like.

Description

technical field [0001] The invention relates to a method for preparing nano-titanium dioxide hollow spherical powder, which belongs to the field of material science, and in particular relates to the technical field of nano-powder preparation. technical background [0002] Nano-ceramic is a new type of ceramic material solidified by particles with a particle size of nanometer size (1nm-100nm). Its grain size, pore size, defect size and grain boundary width should be limited to the nanometer level, and it has unique properties different from traditional ceramics. Among them, the grain size has a very significant impact on the performance of ceramics. The reduction of the grain size will increase the mechanical properties of the material by an order of magnitude, and at the same time help to improve the toughness and plasticity of the material. Therefore, the preparation of nanopowders has become the basis of nanoceramic research. The particle shape, particle size, distributi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
Inventor 张军玲袁章福谭强强李建强
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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