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fe-tio 2 nanotube/g-c 3 no 4 Composite materials and their preparation methods and applications

A composite material, g-c3n4 technology, applied in the field of Fe-TiO2 nanotube/g-C3N4 composite material and its preparation, can solve the problems of difficult precise control of components and structure, further improvement of catalytic performance, complex composite process, etc. , to achieve the effect of improving photocatalytic efficiency, large specific surface area and high photocatalytic degradation activity

Active Publication Date: 2021-02-26
HEBEI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of Fe-TiO 2 Nanotube / g-C 3 N 4 Composite materials and their preparation methods and applications aim to solve the problems that the catalytic performance of existing photocatalytic composite materials needs to be further improved, the components and structures are difficult to accurately control, and the composite process is relatively complicated and costly.

Method used

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  • fe-tio <sub>2</sub> nanotube/g-c <sub>3</sub> no <sub>4</sub> Composite materials and their preparation methods and applications
  • fe-tio <sub>2</sub> nanotube/g-c <sub>3</sub> no <sub>4</sub> Composite materials and their preparation methods and applications
  • fe-tio <sub>2</sub> nanotube/g-c <sub>3</sub> no <sub>4</sub> Composite materials and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A Fe-TiO 2 Nanotube / g-C 3 N 4 Preparation method of composite material:

[0047] 1) Preparation of TiO 2 Nano powder

[0048] Weigh TiCl 4 Added to 4mol / L hydrochloric acid solution to make TiCl 4 Concentration of 0.5mol / L, ultrasound for 35min to obtain a light yellow sol, aging at room temperature for 12h, washing with water and ethanol respectively, drying at 80°C for 3h, and calcining at 450°C for 3h to obtain anatase-type sol with a particle size of about 30nm Nano-TiO 2 Powder.

[0049] 2) Preparation of Fe-TiO 2 nanotube

[0050] Weigh 1.3g of prepared TiO 2 Nano powder, add to 30mL 10mol L -1 In the NaOH solution of , add 0.1mL 0.49mol / L Fe to the mixed system 2 (SO 4 ) 3 (Fe ion molar mass is TiO 2 0.6% of ), stirred for 1h, transferred to the autoclave, 150°C hydrothermal reaction for 24h, washed, dried at 80°C for 4h to obtain 0.6% Fe 3+ (Mole percent) Doped modified Fe-TiO 2 nanotube.

[0051] 3) Preparation of g-C 3 N 4

[0052] Weigh 1...

Embodiment 2

[0059] A Fe-TiO 2 Nanotube / g-C3 N 4 Preparation method of composite material:

[0060] 1) Preparation of TiO 2 Nano powder

[0061] Weigh TiCl 4 Add to 3mol / L hydrochloric acid solution to make TiCl 4 The concentration is 0.4mol / L, sonicated for 25min to obtain a light yellow sol, aged at room temperature for 12.5h, washed with water and ethanol respectively, dried at 80°C for 3h, and then calcined at 550°C for 1h to obtain anatase with a particle size of about 30nm Nano-TiO 2 Powder.

[0062] 2) Preparation of Fe-TiO 2 nanotube

[0063] Weigh 0.5g of prepared TiO 2 Nano powder, add to 30mL 10mol L -1 In the NaOH solution, add 0.1mL 0.125mol / L FeCl to the mixed system 3 (Fe ion molar mass is TiO 2 0.2%), stirred for 1.5h, transferred to the autoclave, 140°C hydrothermal reaction for 30h, washed, dried at 80°C for 4h to obtain 0.2% Fe 3+ (Mole percent) Doped modified Fe-TiO 2 nanotube.

[0064] 3) Preparation of g-C 3 N 4

[0065] Weigh 10g of urea, heat up to...

Embodiment 3

[0069] A Fe-TiO 2 Nanotube / g-C 3 N 4 Preparation method of composite material:

[0070] 1) Preparation of TiO 2 Nano powder

[0071] Weigh TiCl 4 Add to 5mol / L hydrochloric acid solution to make TiCl 4 Concentration of 0.45mol / L, ultrasound for 30min to obtain a light yellow sol, aging at room temperature for 13h, washing with water and ethanol respectively, drying at 80°C for 3h, and calcining at 500°C for 2h to obtain anatase-type sol with a particle size of about 30nm Nano-TiO 2 Powder.

[0072] 2) Preparation of Fe-TiO 2 nanotube

[0073] Weigh 2.0g of prepared TiO 2 Nano powder, add to 30mL 10mol L -1 Add 1mL 0.2mol / L Fe(NO 3 ) 3 (Fe ion molar mass is TiO 2 0.8%), stirred for 2 hours, transferred to the autoclave, 150 ° C hydrothermal reaction for 26 hours, washed, dried at 80 ° C for 4 hours to obtain 0.8% Fe 3+ (Mole percent) Doped modified Fe-TiO 2 nanotube.

[0074] 3) Preparation of g-C 3 N 4

[0075] Weigh 10g of urea, heat up to 520°C at a rate ...

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Abstract

The invention provides a FeTiO 2 Nanotube / g‑C 3 N 4 Composite material and its preparation method and application, the present invention has prepared Fe TiO with high photocatalytic activity at low cost with a simple process 2 Nanotube / g‑C 3 N 4 Composite materials, by controlling the reaction conditions, one-step preparation of homogeneous Fe‑TiO at lower hydrothermal temperature 2 nanotubes, by controlling the TiO 2 FeTiO with controllable tube length and tube diameter can be obtained 2 Uniform nanotubes; and the preparation of composite materials avoids high-temperature heating, and Fe-TiO 2 Nanotubes and g‑C 3 N 4 The composite material can effectively degrade the refractory toxic pollutants in sewage, and also has a good hydrogen production effect, and has a good application prospect in the fields of sewage treatment and energy.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a Fe-TiO 2 Nanotube / g-C 3 N 4 Composite materials and their preparation methods and applications. Background technique [0002] Nano-TiO 2 As a photocatalyst, it can photocatalytically degrade organic pollutants, and can also photolyze water to produce hydrogen. It is widely used in the fields of environmental purification and energy. But nano TiO 2 The powder has problems such as easy agglomeration, difficult separation, and low utilization rate of visible light. Therefore, for TiO 2 Modification, expansion of its effective photoresponse range, improvement of the utilization efficiency of photogenerated electrons and holes, and improvement of photocatalytic reactivity are the basis for the application of photocatalytic treatment of environmental pollution. Through semiconductor coupling, the separation of photoinduced electrons and holes can be promoted, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/10C01B3/04C02F1/30C02F101/34
CPCB01J27/24B01J35/004B01J35/023B01J35/1004C01B3/042C02F1/30C02F2101/345C02F2305/10Y02E60/36
Inventor 刘华亭陈汝芬李法齐
Owner HEBEI NORMAL UNIV
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