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Method of preparing titanium dioxide, stannum dioxide and doping composite fiber material thereof

A composite fiber and tin dioxide technology, applied in the field of nanomaterials, to achieve the effects of cost reduction, raw material saving, and short reaction time

Inactive Publication Date: 2007-09-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

TiO2 fibers with intermediate pores have not been reported to be prepared by vapor phase chemical deposition

Method used

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  • Method of preparing titanium dioxide, stannum dioxide and doping composite fiber material thereof
  • Method of preparing titanium dioxide, stannum dioxide and doping composite fiber material thereof
  • Method of preparing titanium dioxide, stannum dioxide and doping composite fiber material thereof

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Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1 The preparation of titanium dioxide fiber

[0042] Deposition on the surface of activated carbon fibers: put activated carbon fibers into the reactor in the schematic diagram of the fiber material preparation device shown in Figure 1, pass nitrogen to carry titanium tetrachloride vapor and ammonia solution at a predetermined temperature of 5 to 70 ° C, and use a certain The line velocity is 0.01-120cm / min into the reactor, and the temperature of the reactor is maintained at 5-280°C. The reaction deposition time ranges from 1 to 180 minutes. Afterwards, heat up to 100-900°C in the air for 0.1-6 hours, remove the template, and obtain a fiber material with an irregular pore structure in the middle with the characteristics of nano-anatase or rutile ore structure as shown in Figures 2 and 3. The analysis shows that the titanium dioxide grains are nanoscale, and its fibers have the characteristics of one-dimensional tubes of nanomaterials and three-dimensional s...

Embodiment 2

[0043] Embodiment 2 Preparation of composite tin dioxide and titanium dioxide fibers

[0044] Put the activated carbon fiber into the reactor, feed the precursor gas components of tin tetrachloride and titanium in proportion, and alternately feed the water gas component at the same time, enter the reactor to cause the hydrolysis reaction of the precursor, and deposit in the pores of the activated carbon fiber Structure and surface. The temperature range of the reactor is 5-280°C, the temperature of the precursor is 5-70°C, the linear flow rate is in the range of 0.01-120cm / min, sintering in the air, the temperature is 100-900°C and the time range is 1-6 hours, and different Proportional titanium dioxide tin dioxide composite (tubular) fibers.

Embodiment 3

[0045] The preparation of embodiment 3 tin dioxide fibers:

[0046] Carbon fiber surface deposition: Put activated carbon fibers into the reactor of the fiber material preparation device shown in Figure 1, pass nitrogen gas to carry tin tetrachloride vapor and ammonia solution at a predetermined temperature of 5-70 ° C, and use a certain linear speed of 0.01 ~ 120cm / min enters the reactor, and the temperature of the reactor is maintained at 5-280°C. The reaction deposition time ranges from 1 to 180 minutes. Then heat up to 100-900° C. in air for 0.1-6 hours, remove the template, and obtain a tin dioxide fiber material with an irregular pore structure in the middle. If the sintering is performed under a nitrogen atmosphere or an inert gas atmosphere, the template is not removed, and the tin dioxide of the composite carbon fiber is obtained.

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Abstract

This invention relates to a method for preparing fiber TiO2, SnO2 and its doped compound material characterizing in utilizing a fiber material as a template, taking TBT, titanium tetrahalide, tin tetrachloride or a mixture as a precursor, which is carried by nitrogen or argon and enters into a reactor with a gas containing ammonia for chemical gaseous phase deposition, in which, the gas flow, deposition temperature and the sinter atmosphere and temperature are controlled, the inert gas is heated to get load-type fiber material to be sintered under the atmosphere of oxidation and reaction to remove the fiber template and form an oxide fiber material, and utilize the active carbon fiber template and ignition process to form porous fiber or tubular fiber material.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and is a method for preparing nanomaterials, in particular to the preparation of (tubular hollow) fibrous titanium dioxide, tin dioxide and their doped composite materials by using activated carbon fibers as templates and combining atmospheric pressure and low temperature chemical vapor deposition Methods. Background technique [0002] Titanium dioxide nanomaterials have been widely used in solar energy storage and utilization, photoelectric conversion, photochromism and photocatalysis due to their cheap, non-toxic, stable photochemical properties and many other advantages. The preparation method of titanium dioxide material has vapor phase deposition method [1-9] , sol-gel method, etc. Among them, the vapor deposition method mostly uses a relatively high temperature, such as above 300°C, and the common temperature is 500-600°C. Formation of oxides by reaction of precursors with oxygen or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/07C01G23/08C01G19/02B82B3/00
Inventor 柳丽芬杨会娜杨凤林
Owner DALIAN UNIV OF TECH
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