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Pyrolysis synthesis method of TiO2 nano-particles under control of electric field

A nanoparticle and synthesis method technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of increasing preparation cost and difficulty, cumbersome preparation methods, and inability to realize nanostructure control. Achieve the effects of easy mass industrial production, avoid grain growth and agglomeration, and avoid the introduction of toxic substances

Inactive Publication Date: 2019-02-12
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above method can prepare TiO 2 powder, but the control of the nanostructure cannot be achieved, and the preparation method is cumbersome
The preparation conditions are relatively harsh, such as high-temperature sintering or reaction under hydrothermal conditions, which greatly increases the cost and difficulty of preparation

Method used

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  • Pyrolysis synthesis method of TiO2 nano-particles under control of electric field
  • Pyrolysis synthesis method of TiO2 nano-particles under control of electric field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 3.40 g of tetrabutyl titanate in 10 ml of absolute ethanol to obtain Injection A. Inhale liquid A into a 10ml syringe and place it on the syringe pump. Set the syringe pump to an infusion rate of 100 mL / min. Connect the needle of the syringe to the high-voltage electrode of the high-voltage power supply, the collector is a stainless steel mesh, and its electrode is grounded. The high-voltage power supply is set to +5000V, the syringe pump starts to run, and liquid A is ejected from the syringe under high pressure, and an alcohol lamp is placed under the ejection port to continuously heat and ignite the ejected liquid. At this time, the ejected liquid forms a nano-beam due to combustion to form an ejected flame, and the solid nano-particles formed by the flame are collected by a grounded collector. After the reaction is over, turn off the high-voltage power supply and the syringe pump, remove the collector, and directly obtain TiO 2 nanoparticles. Such as ...

Embodiment 2

[0026] Dissolve 3.40 g of titanium tetrachloride in 10 ml of acetone to obtain liquid A for injection. Inhale liquid A into a 10ml syringe and place it on the syringe pump. Set the syringe pump to an infusion rate of 100ml / min. Connect the needle of the syringe to the high-voltage electrode of the high-voltage power supply, the collector is a stainless steel mesh, and its electrode is grounded. The high-voltage power supply is set to +5000V, the syringe pump starts to run, and liquid A is ejected from the syringe under high pressure, and a drying oven is placed under the ejection port, and the heating temperature is 600°C, so that the ejected liquid is continuously heated and ignited. At this time, the ejected liquid forms a nano-beam due to combustion to form an ejected flame, and the solid nano-particles formed by the flame are collected by a grounded collector. After the reaction is over, turn off the high-voltage power supply and the syringe pump, remove the collector, a...

Embodiment 3

[0028] Dissolve 3.80 g of titanium isopropoxide in 20 ml of water to obtain liquid A for injection. Inhale liquid A into a 10ml syringe and place it on the syringe pump. Set the syringe pump to an infusion rate of 800ml / min. Connect the needle of the syringe to the high-voltage electrode of the high-voltage power supply, the collector is a stainless steel mesh, and its electrode is grounded. The high-voltage power supply is set to +7000V, the syringe pump starts to run, and liquid A is ejected from the syringe under high pressure, and an alcohol lamp is placed under the ejection port to continuously heat and ignite the ejected liquid. At this time, the ejected liquid forms a nano-beam due to combustion to form an ejected flame, and the solid nano-particles formed by the flame are collected by a grounded collector. After the reaction is over, turn off the high-voltage power supply and the syringe pump, remove the collector, and directly obtain TiO 2 nanoparticles. Such as ...

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Abstract

The invention discloses a novel synthetic method of TiO2 nano-particles and belongs to the technical field of preparation of oxides with nanostructures. The method comprises the following steps of adding titanium salt in a proper solvent, performing dissolution to obtain an injection, adding the injection in an injector, performing pouring with an injection pump, enabling droplets out of a needleto form a nanometer beam flow under the effect of a certain external electric field, and performing pyrolysis on the nanometer beam flow to produce required TiO2 nano-particles. The synthetic method does not need to perform reaction with solution or high-temperature calcination and can be very convenient to prepare the TiO2 nano-particles with the diameter being 10-100 nm. Without high-temperaturecalcination, the method avoids growth and aggregation of crystal grains and keeps high activity of the crystal grains. Compared with the hydrothermal synthesis method, the method does not need high-temperature and high-pressure super-critical state, simplifies the technology, is simple to operate and low in cost, greatly lowers the equipment requirement and is easy in mass industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanostructured oxides, in particular to a TiO 2 Novel Synthetic Methods of Nanoparticles. Background technique [0002] In general, TiO 2 It is a white solid powder with three main crystal forms: rutile, anatase and brookite. Among them, rutile and anatase are more common. Rutile TiO 2 Due to its high refractive index and excellent birefringence, it has excellent white covering ability, and is widely used in white pigments, ceramic glazes, paints, inks, rubber, paper and other fields. Mixed-phase nanoparticles of rutile and anatase have excellent photocatalytic properties and are used in cosmetics, anti-mildew, sterilization, and environmental protection. Due to the excellent functional properties of titanates, TiO 2 It can also be used as a raw material to prepare ferroelectric, piezoelectric and dielectric ceramic materials. [0003] Currently TiO 2 The mainstream process of indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/07B82Y30/00
CPCB82Y30/00C01G23/07C01P2002/72C01P2004/03C01P2004/64
Inventor 马振伟齐建全韩秀梅常娟雄程静孙金月孙晴雯李梦莹李妍
Owner 东北大学秦皇岛分校
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