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Preparation method of nitrogen doping titanium dioxide powder, prepared titanium dioxide powder material and purpose thereof

A titanium dioxide and nitrogen doping technology, applied in chemical instruments and methods, physical/chemical process catalysts, applications, etc., can solve the problems of high cost, effective nitrogen doping, difficult to obtain, etc., and achieve good crystallinity and small particle size. , the effect of large specific surface area

Active Publication Date: 2013-12-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these conventional preparation methods usually require high-temperature processes or the use of expensive additives to achieve TiO 2 The effective nitrogen doping of the powder is costly, and due to many factors such as the degree of crystallization of the powder, the specific surface area and the thermal stability of the crystal form, the TiO 2 photocatalytic performance, and a single synthesis process is difficult to obtain TiO with many excellent properties 2 Powder

Method used

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  • Preparation method of nitrogen doping titanium dioxide powder, prepared titanium dioxide powder material and purpose thereof
  • Preparation method of nitrogen doping titanium dioxide powder, prepared titanium dioxide powder material and purpose thereof
  • Preparation method of nitrogen doping titanium dioxide powder, prepared titanium dioxide powder material and purpose thereof

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Embodiment 1

[0033] Dissolve 1 part by volume of tetrabutyl titanate in 10 parts by volume of acetic acid, and stir at room temperature for 24 hours to obtain a gel, then place the gel in a drying oven at 80°C for 12 hours, and dry grind for 1 hour to obtain Precursor powder. Carry out SEM test to the precursor powder prepared in this embodiment, the photo is as figure 1 shown. Take 0.4g of precursor powder, and press it in the axial direction at room temperature and 10MPa (forming a disc with a diameter of 10mm and a thickness of 1mm), and then undergo cold isostatic pressing at 180MPa to obtain the precursor block. Then, the precursor block was implanted between the mantle and the shell of the spinosa clam as a bead nucleus, and the nucleated spinosa clam was put into fresh water for cultivation. After 45 days of cultivation, it was taken out of the spinosa clam. A bead core that has been coated with nacre. Remove the pearl layer grown on the surface of the bead nucleus to obtain a li...

Embodiment 2

[0037] Dissolve 2 parts by volume of tetrabutyl titanate in 10 parts by volume of acetic acid, and stir at room temperature for 24 hours to obtain a gel, then place the gel in a drying oven at 80°C for 12 hours, and dry grind for 2 hours to obtain Precursor powder. Take 0.8g of precursor powder, and press it in the axial direction at room temperature and 11MPa (forming a disc with a diameter of 10mm and a thickness of 2mm), and then press it through cold isostatic pressing at 180MPa to obtain the precursor block. Then, the precursor block was implanted between the mantle and the shell of the spinosa clam as a bead nucleus, and the nucleated spinosa clam was put into fresh water for cultivation. After 90 days of cultivation, it was taken out of the spinosa clam. A bead core that has been coated with nacre. Remove the pearl layer grown on the surface of the bead nucleus to obtain a light yellow block, and then grind to obtain a light yellow powder. The ground light yellow powd...

Embodiment 3

[0040] Dissolve 3 parts by volume of tetrabutyl titanate in 10 parts by volume of acetic acid, and stir at room temperature for 24 hours to obtain a gel, then place the gel in a drying oven at 80°C for 12 hours, and dry grind for 0.5 hours, Get the precursor powder. Take 2g of precursor powder, and press it in the axial direction at room temperature and 15MPa (forming a disc with a diameter of 20mm and a thickness of 1.2mm), and then press it through cold isostatic pressing at 180MPa to obtain the precursor block. Then, the precursor block was implanted between the mantle and the shell of the spinosa clam as a bead core, and the cored spinosa clam was put into fresh water for cultivation. After 60 days of cultivation, it was taken out from the body of the spinosa clam. A bead core that has been coated with nacre. Remove the pearl layer grown on the surface of the bead nucleus to obtain a light yellow block, and then grind to obtain a light yellow powder. The ground light yel...

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Abstract

The invention relates to a preparation method of nitrogen doping titanium dioxide (TiO2) powder. The method which is low in cost, high in energy saving and capable of preparing the titanium dioxide powder with strong visible-light catalytic activity is characterized by including the following steps that (1) precursor powder is prepared; (2) a precursor block is prepared; (3) biological mineralization of the precursor block is conducted, wherein the precursor block obtained from the step (2) is used as a nucleus to be planted into the position between a pallium and a shell of a hyriopsis cumingii, then the hyriopsis cumingii is placed into fresh water to be cultivated, after 45-90 days, the hyriopsis cumingii is taken out to obtain the nucleus coated with a nacreous layer, and the nacreous layer on the outer surface of the nucleus is removed to obtain the nitrogen doping titanium dioxide powder; (4) purification is carried out on the nitrogen doping titanium dioxide powder. Due to the fact that the entire biological system environment is adopted, the synthetic process of the nitrogen doping titanium dioxide powder is conducted at normal temperatures and pressures, and the titanium dioxide powder with multi-aspect excellent properties such as good crystallinity, large specific surface area, good crystal form heat stability and strong visible-light catalytic activity is obtained at the same time.

Description

technical field [0001] The invention belongs to titanium dioxide (TiO 2 ) field of photocatalytic technology, in particular to a preparation method of nitrogen-doped titanium dioxide powder, the prepared titanium dioxide powder material and its application. Background technique [0002] Since Japanese scholars A.Fujishima and K.Honda discovered n-type semiconductor titanium dioxide (TiO2) in 1972 2 ) has decomposed water into hydrogen and oxygen under ultraviolet light irradiation (A.Fujishima, K.Honda.Electrochemicalphotolysisofwateratasemiconductorelectrode.Nature,1972,238:37-38), TiO 2 As a kind of semiconductor photocatalyst, it has attracted more and more research interest in many aspects such as solar energy conversion and storage, degradation of organic matter, sterilization and disinfection, sewage treatment, air purification and so on. In recent years, environmental pollution has become increasingly serious, TiO 2 It has become a hot issue in the field of photoca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J27/00C02F1/30B82Y40/00A01K61/00
CPCY02A40/81Y02W10/37
Inventor 傅正义解晶晶曾辉王为民王玉成王皓张金咏张帆
Owner WUHAN UNIV OF TECH
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