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Preparation method of structure-controllable iron and nitrogen co-doped TiO2 nanotube

A nanotube, co-doping technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of poor repeatability and low yield of preparation methods, and achieve strong visible light catalytic activity, High success rate and good repeatability

Inactive Publication Date: 2017-06-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0004] However, the materials prepared in the above reports have the problems of low yield and poor repeatability of the preparation method. Therefore, solving the above problems and realizing the mass production of products has become a hot issue in scientific research.

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  • Preparation method of structure-controllable iron and nitrogen co-doped TiO2 nanotube
  • Preparation method of structure-controllable iron and nitrogen co-doped TiO2 nanotube
  • Preparation method of structure-controllable iron and nitrogen co-doped TiO2 nanotube

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preparation example Construction

[0034] Iron-nitrogen co-doped TiO with controllable structure of the present invention 2 The preparation method of nanotube specifically comprises the following steps:

[0035] (1), Fe(NO 3 ) 2 ·6H 2 O and C 3 N 3 (NH 2 ) 3 dissolved in ultrapure water; where Fe(NO 3 ) 2 ·6H 2 O, C 3 N 3 (NH 2 ) 3 The mass ratio of CTPs to titanium dioxide nanotubes is 0.05~1:5:10, and every 1g of C 3 N 3 (NH 2 ) 3 Dissolve in 20-40mL ultrapure water.

[0036] (2) Add titanium dioxide nanotube CTPs to the concentrated NaOH solution, use ultrasonic dispersion and magnetic stirring to fully disperse titanium dioxide nanotube CTPs in the NaOH solution to obtain a white suspension. The time of ultrasonic dispersion and magnetic stirring time are equal 30-60 minutes.

[0037] The ratio relationship between titanium dioxide nanotube CTPs and concentrated NaOH solution is: every 1g of titanium dioxide nanotube is added to 80-150mL concentrated NaOH solution; the concentration of Na...

Embodiment 1

[0043] First, weigh 0.35g C 3 N 3 (NH 2 ) 3 and 0.0035~0.07g Fe(NO 3 ) 2 ·6H 2 O (solutions with 5 concentration gradients), dissolved in 10mL ultrapure water, then added 0.7g CTPs, and then added 70mL pre-prepared concentrated NaOH solution, so that the final NaOH concentration was 10mol / L, after ultrasonic dispersion for 30min and then Stir magnetically for 30 min to fully disperse the CTPs in the NaOH solution to obtain a white suspension. Transfer the white suspension to a polytetrafluoroethylene reaction kettle liner, put it into a stainless steel reaction kettle, tighten it, place it in a constant temperature blast drying oven, and react for 24 hours at a temperature of 130°C. After the reaction was completed, the reactor was cooled to room temperature, and the samples were taken out, centrifuged and washed with ultrapure water to neutrality (pH 7), the centrifugation rate was 10000r / min, and the centrifugation time was 20min. Then soak and stir with 0.1M HCl at r...

Embodiment 2

[0047] First, weigh 0.7g C 3 N 3 (NH 2 ) 3 and 0.007~0.14g Fe(NO 3 ) 2 ·6H 2 O (solutions with 5 concentration gradients), dissolved in 10mL ultrapure water, then added 1.4g CTPs, and then added 140mL pre-prepared concentrated NaOH solution, so that the final NaOH concentration was 10mol / L, after ultrasonic dispersion for 30min and then Stir magnetically for 30 min to fully disperse the CTPs in the NaOH solution to obtain a white suspension. Transfer the white suspension to a polytetrafluoroethylene reaction kettle liner, put it into a stainless steel reaction kettle, tighten it, place it in a constant temperature blast drying oven, and react for 24 hours at a temperature of 130°C. After the reaction was finished, the reactor was cooled to room temperature, and the samples were taken out, centrifuged and washed with ultrapure water to neutrality (pH 7), the centrifugation rate was 12000r / min, and the centrifugation time was 20min. Then soak and stir with 0.1M HCl at roo...

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Abstract

The invention relates to a preparation method of a structure-controllable iron and nitrogen co-doped TiO2 nanotube. A mild, simple and reliable hydro-thermal synthesis route is provided, titanium dioxide CTPs is used as a raw material, Fe(NO3)2.6H2O and C3N3(NH2)3 are used as doped precursors (respectively serving as a Fe source and an N source), and the Fe and N co-doped TiO2 nanotube is prepared through a one-step hydrothermal method. The Fe and N co-doped TiO2 nanotubes different in doping amount can be prepared by controlling reactant proportion and reaction conditions. The preparation method is mild, the operation is simple and convenient, the success rate is high, the repeatability is good, the product purity is high, the structure-controllable iron and nitrogen co-doped TiO2 nanotube can be prepared massively, and the prepared Fe and N co-doped TiO2 nanotube has strong visible light catalysis activity and can be applied to catalytic degradation of organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanomaterials, and relates to a structure-controllable iron-nitrogen co-doped TiO 2 Methods for the preparation of nanotubes. Background technique [0002] Titanium dioxide nanotubes (TiO 2 Nanotubes (TNTs) have higher specific surface area and charge transport properties, thus showing stronger adsorption capacity and higher photocatalytic performance. However, TNTs have a high band gap (3.2eV for anatase) and can only be excited by ultraviolet light, so the utilization rate of solar energy is low (ultraviolet light accounts for about 4% of sunlight, and visible light accounts for about 45%). The practical application of TNTs photocatalysis is limited. In addition, the photogenerated electrons and holes generated by photoexcitation are very easy to recombine, resulting in low photon quantum efficiency. In order to improve the above deficiencies, researchers at home and abroad have carr...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30B82Y30/00B82Y40/00C02F101/30
CPCB82Y30/00B82Y40/00C02F1/30B01J27/24C02F2305/10C02F2101/30B01J35/40B01J35/39
Inventor 姚卫棠陈鑫段涛竹文坤张友魁
Owner SOUTHWEAT UNIV OF SCI & TECH