Method for preparing C-N-codoped nano-TiO2 powder

A co-doping, C-N technology, applied in the direction of nanotechnology, titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of high equipment requirements, ineffective control of agglomeration problems, cumbersome preparation process of precursors, etc., to achieve The effect is simple and easy to control

Active Publication Date: 2012-07-04
JIANGSU NADN SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chem.Res., 2007,46:2741) etc. synthesized C-N co-doped TiO by sol-gel method 2 , but the reaction cycle is longer, and more importantly, the agglomeration problem cannot be effectively controlled, and the sintering performance of the gel particles is poor; the literature "Fabrication of C, N-Codoped TiO2 Nanotube Photocatalysts with Visible Light Response" (Shi, J.; Li, J.; Cai, Y. F. Acta Phys. -Chim. Sin., 2008,24(7):1283), etc. used plasma electrolysis method to achieve C-N co-doping of titanium dioxide, this method has a great impact on the device The requirements are relatively high, and the energy consumption is relatively large, which does not meet the current energy-saving and emission-reduction requirements; the literature "Title-Preparation and Photocatalytic Hydrogen Evolution Performance of C-N Co-doped Nano TiO2 Photocatalysts" (Zhang, X. Y.; Cui, X. Li. Acta Phys.-Chim. Sin., 2009,25(9):1829-1834) prepared C-N co-doped TiO by calcination method 2 , due to the need to prepare a special calcined precursor TiCN, and the preparation process of the precursor is cumbersome

Method used

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  • Method for preparing C-N-codoped nano-TiO2 powder
  • Method for preparing C-N-codoped nano-TiO2 powder
  • Method for preparing C-N-codoped nano-TiO2 powder

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Butyl titanate and absolute ethanol were mixed evenly at a volume ratio of 1:6, and urea with a mass ratio of 0.5% was added at the same time, poured into the same beaker, and oscillated under an ultrasonic instrument for 3 minutes to fully dissolve the urea. Then magnetically stir and mix evenly to make a colorless and transparent mixed solution. After about 3 minutes, turn on the air pump switch, with 40 L·min -1 The air is delivered to the three-necked flask with a small amount of water at a rate of 100%, and the water vapor is brought into the beaker with a mixture of butyl titanate, ethanol and urea through another interface, and the quality of the water vapor delivered is controlled relative to the mixing. Liquid is 12.5g·L -1 , continue magnetic stirring, after 3 minutes, the mixed solution turns from colorless and transparent to turbid, and finally turns into a white emulsion, and the reaction stops after 40 minutes. Put the beaker containing the w...

Embodiment 2

[0018] Example 2: Butyl titanate and absolute ethanol are mixed evenly at a volume ratio of 1:8, and urea with a mass ratio of 0.8% is added at the same time, poured into the same beaker, stirred evenly in a stirrer until the urea is fully dissolved, and mixed Uniformly made into a colorless and transparent mixture. Then turn on the air pump switch, with 60 L·min -1 Air is delivered to a three-neck flask containing a small amount of water at a rate of 100%, and water vapor is brought into a beaker containing a mixture of butyl titanate, ethanol and urea through another interface, and the quality of water vapor delivered is controlled relative to the mixing Liquid is 17.5g·L -1 , continue magnetic stirring, after about 5 minutes, the mixed solution turns from colorless and transparent to turbid, and finally turns into a white emulsion, and the reaction stops after 45 minutes. Put the beaker containing the white emulsion into a blast drying oven, and let it stand at 40°C for ...

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Abstract

The invention discloses a method for preparing C-N-codoped nano-TiO2 powder. The method comprises the following steps of: mixing tetra-n-butyl titanate and absolute ethanol in a volume ratio of 1:(5-10), and adding 0.1 to 1.0 mass percent of urea to obtain colorless transparent mixed liquor; under stirring conditions, conveying the air containing water vapor into the mixed liquor and reacting; and drying obtained emulsion to obtain white powder, and calcining at the temperature of between 300 and 500 DEG C to obtain C-N-codoped TiO2 nanoparticles. In the method, the whole reaction process is controlled by utilizing steam, and organic surfactants and dispersants are not needed to be added, so the invention has the characteristics that the process is simple and easy to control and the production process is environment-friendly; and a prepared product has higher purity, microscopic sizes of particles are uniform, the dispersibility is high, and the method is particularly suitable for continuous industrial production.

Description

technical field [0001] The invention relates to a method for preparing nano powder, in particular to a method for preparing C-N co-doped nano TiO 2 The powder method belongs to the technical field of inorganic nanometer materials. Background technique [0002] Nano titanium dioxide material is a new type of inorganic material, which can be divided into three crystal forms: anatase, rutile and brookite. Among them, anatase nano-titanium dioxide, as a new type of photocatalyst, anti-ultraviolet agent and photoelectric effect agent, has shown broad application prospects in anti-mold and sterilization, air purification, deodorization, water treatment, and anti-pollution. Rutile nano-titanium dioxide has the advantages of high refractive index, good weather resistance, low photochemical activity, high hiding power, stable physical and chemical properties, etc. It is an indispensable raw material in the fields of electronics, light industry, and chemical industry. It is widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00
Inventor 王作山郑敏李良海鲁娟
Owner JIANGSU NADN SCI TECH CO LTD
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