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Rodlike N-Ag codoped TiO2 and preparation method thereof

A co-doped, rod-shaped technology, applied in the direction of titanium oxide/hydroxide, nanotechnology, titanium dioxide, etc., can solve the problems of great harm to the human body, and achieve the effects of reducing pollution, excellent performance, and simple process

Active Publication Date: 2012-10-17
汕头市凤城纺织有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent (CN 101952202A) discloses a method for preparing titanium dioxide with nanometer size and controllable shape. Titanium dioxide nanorods are prepared by reflux in a flask equipped with a bubble condenser, but in the process, titanium dioxide nanorods containing benzene rings are used. Organic solvents are harmful to the human body

Method used

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  • Rodlike N-Ag codoped TiO2 and preparation method thereof
  • Rodlike N-Ag codoped TiO2 and preparation method thereof
  • Rodlike N-Ag codoped TiO2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 0.007g of urea (the molar ratio of N and Ti is 1:100), 8 mL of butyl titanate and 32 mL of absolute ethanol, pour them into the same three-necked flask, turn on the magnetic stirring, and mix them evenly. dubbed into a solution;

[0026] (2) After 5 min, turn on the air pump switch, with 40 L min -1 The air is delivered to the water in the airtight container at a rate of 2.5-3.5g·L through another port on the container. -1 , input the gas containing water into the mixed solution of butyl titanate and ethanol. Under the condition of mechanical stirring, the mixed solution gradually becomes turbid from light yellow transparent liquid, and finally turns into white emulsion. Stop inputting air and react for 30 minutes. stop;

[0027] (3) Distill the three-neck flask containing the white emulsion under reduced pressure to collect absolute ethanol for reuse; collect the white powder, put it in a blast drying oven, and let it stand at 40 °C for 12 h to obtain a d...

Embodiment 2

[0031] According to the technical scheme of Example 1, the nanopowder obtained in step (4) was calcined at 500 °C for 2 h to obtain rod-shaped N and Ag co-doped TiO calcined at 500 °C without nitrogen protection. 2 , marked as NAT-1-500, its X-ray diffraction pattern is shown in the attached figure 1 The curve b of the scanning electron microscope is shown in the appendix figure 2 Figure (b).

Embodiment 3

[0033](1) Weigh 0.007 g of urea and 0.009 g of ammonium nitrate (the molar ratio of N and Ti is 2:100) and dissolve them in 8 mL of butyl titanate and 32 mL of absolute ethanol; pour them into the same three-necked flask, and turn on the magnetic stirring , make it evenly mixed to form a solution;

[0034] (2) After 5 min, turn on the air pump switch, with 40 L min -1 The air is delivered to the water in a closed container with a small amount of water at a certain rate, and the air containing water is output through another port on the container, and the quality of the water vapor delivered is 2.5~3.5g·L -1 , input the gas containing water into the mixed solution of butyl titanate and ethanol, and carry out mechanical stirring. The mixed solution gradually becomes turbid from a light yellow transparent liquid, and finally turns into a white emulsion. Stop inputting air, and stop after 30 minutes of reaction;

[0035] (3) Distill the three-neck flask containing the white emul...

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Abstract

The invention discloses a rodlike N-Ag codoped TiO2 and a preparation method of the rodlike N-Ag codoped TiO2, belonging to the preparation field of inorganic nanometer materials. The method takes hydrolyzed titanium salt as a main raw material and soluble nitrogen salt and silver salt as doping agents of nitrogen and silver; the technologies such as hydrolysis, grinding, calcination and the like are adopted, and induction orientation is carried out in the sintering process to control the morphology; and finally, the rodlike N-Ag codoped TiO2 can be obtained. The nano-powder obtained by the preparation method has the characteristics of being small in particle size, regular in morphology, even in distribution, good in dispersity and the like; and the process is high in synthesis speed, low in cost, high in yield and free from pollution, thus having industrial popularization value.

Description

technical field [0001] The invention relates to an inorganic nanomaterial and its preparation, in particular to a rod-shaped N and Ag co-doped TiO 2 and its preparation method. Background technique [0002] Due to its chemical and biological inertness, high stability, non-toxicity and low cost, TiO 2 It is considered to be the semiconductor photocatalyst with the most potential application value, and its application in photovoltaic cells and sensors has also attracted more and more attention. But TiO 2 The wide band gap and the easy recombination of photogenerated electrons and holes hinder its practical application. [0003] Numerous studies have shown that the synergistic effect produced by the co-doping of metals and nonmetals can overcome pure TiO 2 some defects. Prior art for N, Ag co-doped TiO 2 For research on this aspect, please refer to the literature "Silver and nitrogen co-doped TiO 2 Preparation and photocatalytic performance of N, Ag co-doped TiO pre...

Claims

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Application Information

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IPC IPC(8): C01G23/08B82Y30/00B82Y40/00
Inventor 王作山郑敏周秀峰
Owner 汕头市凤城纺织有限公司
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