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Hollow spherical rutile titanium dioxide mesocrystal and preparation method thereof

A rutile titanium dioxide, hollow spherical technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of high energy consumption, poor environmental friendliness, and high industrialization cost

Active Publication Date: 2015-08-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the hydrothermal / solvothermal method requires a high temperature and high pressure environment, high energy consumption, poor environmental friendliness, great safety hazards, and high industrialization costs; while the topology transformation method requires the preparation of suitable precursors, and the subsequent processing of the precursors titania mesogen
The morphology of titanium dioxide crystals obtained so far includes nanorods, nanoflowers, hollow nanobricks, dumbbell-shaped and sheet-like structures, but there is no low-temperature one-step method to directly prepare hollow spherical structures stacked by rutile crystal nanorods

Method used

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  • Hollow spherical rutile titanium dioxide mesocrystal and preparation method thereof
  • Hollow spherical rutile titanium dioxide mesocrystal and preparation method thereof
  • Hollow spherical rutile titanium dioxide mesocrystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Take 3 mL of nitric acid with a mass percentage of 63% and add it to 50 mL of a 10% hydrogen peroxide solution;

[0026] 2) Add potassium titanium oxalate to the solution obtained in step 1), so that the concentration of potassium titanium oxalate in the solution is 100 mmol / L, and mix thoroughly by ultrasonic oscillation to obtain a dark red transparent solution;

[0027] 3) Seal the dark red transparent solution obtained in step 2) and place it at 80 o C oven, keep warm for 72 hours, centrifuge, wash and dry to obtain white powder, which is hollow spherical rutile titanium dioxide mesocrystal.

[0028] The hollow spherical rutile titanium dioxide mesocrystal prepared in this example is as follows figure 1 , 2 As shown, the width of the nanorods is about 100-250 nm, the length is about 200-500 nm, and the diameter of the hollow sphere assembled by the nanorods is 3.0-6.0 μm. image 3 The XRD results confirmed that the obtained powder was well-crystallized rutile ...

Embodiment 2

[0031] 1) Take 1 mL of nitric acid with a mass percentage of 63% and add it to 50 mL of a 10% hydrogen peroxide solution;

[0032] 2) Add potassium titanium oxalate to the solution obtained in step 1), so that the concentration of potassium titanium oxalate in the solution is 100 mmol / L, and mix thoroughly by ultrasonic oscillation to obtain a dark red transparent solution;

[0033] 3) Seal the dark red transparent solution obtained in step 2) and place it at 80 o C oven, heat preservation for 72 hours, centrifuged, washed, dried to obtain a white powder.

[0034] The SEM photograph of the hollow spherical rutile titanium dioxide mesocrystal that this example makes is as follows Figure 13 , the structural unit nanorods have a length of 150-250 nm and a width of 70-150 nm.

Embodiment 3

[0036] 1) Take 3 mL of nitric acid with a mass percentage of 63% and add it to 50 mL of a 10% hydrogen peroxide solution;

[0037] 2) Add potassium titanium oxalate to the solution obtained in step 1) so that the concentration of potassium titanium oxalate in the solution is 200 mmol / L, and mix thoroughly by ultrasonic oscillation to obtain a dark red transparent solution;

[0038] 3) Seal the dark red transparent solution obtained in step 2) and place it at 80 o C oven, heat preservation for 72 hours, centrifuged, washed, dried to obtain a white powder.

[0039] The SEM photograph of the hollow spherical rutile titanium dioxide mesocrystal that this example makes is as follows Figure 14 , the length of the structural unit nanorod is about 150-200 nm, and the width is about 50-100 nm.

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Abstract

The invention discloses hollow spherical rutile titanium dioxide mesocrystal which is of a hollow spherical structure assembled through rutile crystal nanorods, wherein the diameter of a hollow sphere is 3.0 to 6.0 microns, the length of every nanorod is 200 to 500 nanometers, and the width of every nanorod is 100 to 250 nanometers. A preparation method of the hollow spherical rutile titanium dioxide mesocrystal comprises the step of dissolving titanium potassium oxalate into the hydrogen peroxide reaction liquid for 48 to 72 hours of heat preservation under 80 DEG C, wherein nitric acid is added into the hydrogen peroxide reaction liquid. According to the hollow spherical rutile titanium dioxide mesocrystal and the preparation method thereof, the high temperature and high pressure hydrothermal environment is not required, the hollow spherical rutile titanium dioxide mesocrystal is obtained after the low temperature, the preparation route is simple and easy, the cost is low, the powder production rate is high, and the hollow spherical rutile titanium dioxide mesocrystal and the preparation method can be applied to the fields of light catalysis, lithium ion batteries and the like.

Description

technical field [0001] The invention relates to a hollow spherical rutile titanium dioxide mesocrystal and a preparation method thereof, belonging to the field of preparation of metal oxide functional materials. Background technique [0002] Titanium dioxide is one of the few inorganic materials that are very stable in both acidic and alkaline conditions. Due to its excellent biocompatibility, non-toxic and harmless, sufficient resources and low cost, it is widely used in photocatalysis, Electrochromic, dye-sensitized solar cells and lithium-ion batteries have broad application prospects, and are increasingly becoming a key material to solve global environmental and energy problems. Mesogenic structure materials are rich in mesopores, and their atomic arrangement and orientation are close to those of single crystals, so their physical and chemical properties are similar to those of single crystals, and their specific surface area is significantly higher than that of single c...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 赖璐璐吴进明
Owner ZHEJIANG UNIV
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