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Synthesis of TiO2 nanometer particles and bars

A synthesis method and nanoparticle technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of difficulty in obtaining high crystallinity, uniform size, inability to further assemble, industrial application limitations, etc. The effect of cheap raw materials and stable product quality

Inactive Publication Date: 2006-08-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, traditional synthetic methods and methods reported in the literature are difficult to obtain high crystallinity, uniform size and redispersible TiO in organic solvents. 2 nanoparticles and nanorods, which cannot be further assembled into high-quality TiO 2 thin film, making TiO 2 Further industrial applications are somewhat limited
For example, German "Advanced Materials" (Advanced Materials) 2003, volume 15, page 1205, reported the preparation of TiO by template method 2 colloidal balls; the United States "Journal of the American Chemical Society" (Journal of the American Chemical Society) 2003 volume 125 page 12384 reported the preparation of TiO by hydrothermal method 2 Nanotubes; German "Advanced Materials" (Advanced Materials) 2003 15 volume 427 pages reported that TiO was prepared by sol-gel electrophoretic deposition 2 nanorods, the method is cumbersome to operate and the equipment is complex

Method used

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  • Synthesis of TiO2 nanometer particles and bars
  • Synthesis of TiO2 nanometer particles and bars
  • Synthesis of TiO2 nanometer particles and bars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In typical TiO 2 During the synthesis of nanoparticles, the NH 4 HCO 3 (1g), linoleic acid (LA, about 25mL), triethylamine (5mL) and cyclohexane (5mL) were mixed uniformly with electromagnetic stirring at room temperature, and then the Ti(OBu) 4 (1 mL) was slowly added dropwise to the solution. Stir further at room temperature to make the system evenly mixed, then transfer the solution to a stainless steel hydrothermal kettle with a Teflon (Teflon) liner and react for several hours at 150°C to obtain high crystallinity, uniform size, and organic solvent redispersible TiO 2 nanoparticles.

[0032] In typical TiO 2 During the synthesis of nanorods, linoleic acid (LA, about 7mL), triethylamine (5mL) and cyclohexane (15mL) were mixed uniformly with electromagnetic stirring at room temperature, and the Ti(OBu) 4 (1 mL) was slowly added dropwise to the solution. At room temperature, electromagnetically stir further to make the system evenly mixed, then transfer the solut...

Embodiment 2

[0035] In typical TiO 2 During the synthesis of nanoparticles, the NH 4 HCO 3 (0.5g), linoleic acid (LA, about 10mL), triethylamine (1mL) and cyclohexane (10mL) were mixed uniformly with electromagnetic stirring at room temperature. 2% SnCl 4 ·5H 2 O was added to the reaction system. Then Ti(OBu) 4 (2 mL) was slowly added dropwise to the solution. Stir further at room temperature to make the system evenly mixed, then transfer the solution to a stainless steel hydrothermal kettle with a Teflon (Teflon) liner and react at 180° C. for several hours. Under the same conditions, replace tetrabutyl titanate with organic titanates such as tetraisopropyl titanate, replace linoleic acid with long-chain organic acids such as dodecanoic acid and capric acid, and replace triethylamine with Replaced with organic amines such as dodecylamine, replaced cyclohexane with low-boiling organic solvents such as hexane, controlled the reaction temperature at 100, 150, and 200°C, and controlled...

Embodiment 3

[0037] In typical TiO 2 During the synthesis of nanoparticles, the NH 4 HCO 3 (2 g), linoleic acid (LA, about 5 mL), triethylamine (3 mL) and cyclohexane (5 mL) were mixed uniformly at room temperature with electromagnetic stirring. 1% FeCl 3 added to the reaction system. Then Ti(OBu) 4 (5mL) was slowly added dropwise to the solution. Stir further at room temperature to make the system evenly mixed, and then transfer the solution to a stainless steel hydrothermal kettle with a Teflon liner and react at 100°C for several hours.

[0038] Under the same conditions, replace tetrabutyl titanate with organic titanates such as tetraisopropyl titanate, replace linoleic acid with long-chain organic acids such as dodecanoic acid and capric acid, and replace triethylamine with Replaced with organic amines such as dodecylamine, replaced cyclohexane with low-boiling organic solvents such as hexane, controlled the reaction temperature at 100, 150, and 200°C, and controlled the amount ...

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Abstract

Synthesis of TiO2 nanometer granules and rod is characterized by taking organic titanate ester or long-chain organic hydroxy acid or NH4HCO3 as raw materials under the existence of heat solvent, taking organic amine as mineralizer, taking low-boiling point organic matter as solvent, reacting at 100~200 degrees C in closed reactor, synthesizing TiO2 nanometer granules and rod with high crystallinity, homogeneous size and re-dispersion organic solvent, doping other metal ions into reactive system and forming TiO2 nanometer granules or rod doped with metal. It is simple and cheap, has better process reproducibility and quality. It can be used for battery electrode, catalyst, light catalyst and solar battery.

Description

technical field [0001] The invention relates to a TiO with high crystallinity, uniform size and redispersible organic solvent 2 The synthesis of nano particles and nano rods and their internal doping (including iron, cobalt, nickel, manganese, tin) process methods belong to the technical field of inorganic material preparation. Background technique [0002] TiO 2 It is an important semiconductor material with special physical and chemical properties, and has broad application prospects in the fields of batteries, photocatalysis, photolysis of water, photodegradation of organic matter, and photochromic windows. with TiO 2 Technology based on solar energy may provide a solution to some of the most critical problems in human development, such as environmental purification, solar energy utilization, and life sciences. So far, traditional synthetic methods and methods reported in the literature are difficult to obtain high crystallinity, uniform size and redispersible TiO in o...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 李亚栋李晓林
Owner TSINGHUA UNIV
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