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Preparation method and application of magnetically-separatable TNTs/g-C3N4 nano-composite material

A nanocomposite material, g-c3n4 technology, applied in chemical instruments and methods, chemical/physical processes, water treatment of special compounds, etc., can solve problems such as limitations, difficult solid-liquid separation, low photocatalytic activity, etc. and hole separation efficiency, solving recycling difficulties, and expanding the visible light response range

Active Publication Date: 2019-01-11
NORTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application of photocatalytic treatment of wastewater, TNTs have shortcomings such as difficult solid-liquid separation and low catalytic activity under visible light, which limit the application of photocatalytic technology.

Method used

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  • Preparation method and application of magnetically-separatable TNTs/g-C3N4 nano-composite material
  • Preparation method and application of magnetically-separatable TNTs/g-C3N4 nano-composite material
  • Preparation method and application of magnetically-separatable TNTs/g-C3N4 nano-composite material

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Effect test

Embodiment 1

[0019] The invention discloses a magnetically separable TNTs / g-C 3 N 4 The preparation method of nanocomposite material, comprises the following steps, takes a certain amount of g-C 3 N 4 Disperse in 50ml deionized water and sonicate for 1 hour to obtain a uniform dispersion, and stir a certain amount of P 25 Slowly add g-C 3 N 4 In the dispersion, continue ultrasonication for 0.5h, stir for 0.5h to ensure complete mixing, and then add a certain amount of FeCl with a molar ratio of 2:1 3 ·6H 2 O and FeSO 4 ·7H 2 O, then continue to sonicate for another 15 minutes and stir for 15 minutes to ensure complete mixing. 1M NaOH solution was added dropwise to the above mixture to make the pH of the solution equal to 10, and then a certain amount of NaOH was added to transfer the mixture into a hydrothermal reaction kettle, and then the reaction kettle was heated at 120° C. for 24 hours. After cooling, wash with deionized water until neutral, then soak with 0.01M HCl solution ...

Embodiment 2

[0039] A magnetically separable TNTs / g-C 3 N 4 The preparation method of nanocomposite material, comprises the following steps, takes a certain amount of g-C 3 N 4 Disperse in 50ml deionized water and sonicate for 0.8 hours to obtain a uniform dispersion, and stir a certain amount of P 25 Slowly add g-C 3 N 4 In the dispersion, continue ultrasonication for 0.4h, stir for 0.4h to ensure complete mixing, and then add a certain amount of FeCl with a molar ratio of 2.5:1 3 ·6H 2 O and FeSO 4 ·7H 2 O, then continue to sonicate for 12 minutes, stir for 15 minutes to ensure complete mixing; add 0.8M NaOH solution dropwise to the above mixture to make the pH of the solution equal to 10, then add a certain amount of NaOH to transfer the mixture to a hydrothermal Then heat the reactor at 100°C for 24 hours; wash it with deionized water until it is neutral, and soak it with 0.01M HCl solution for 0.8 hours; finally wash it with deionized water several times, and then wash it with...

Embodiment 3

[0043] A magnetically separable TNTs / g-C 3 N 4 The preparation method of nanocomposite material, comprises the following steps, takes a certain amount of g-C 3 N 4 Dispersed in 50ml of deionized water and ultrasonically treated for 1.2 hours to obtain a uniform dispersion, a certain amount of P 25 Slowly add g-C 3 N 4 In the dispersion, continue ultrasonication for 0.6h, stir for 0.6h to ensure complete mixing, and then add a certain amount of FeCl with a molar ratio of 3.5:1 3 ·6H 2 O and FeSO 4 ·7H 2 O, then continue to sonicate for 16 minutes, stir for 15 minutes to ensure complete mixing; add 1.2M NaOH solution dropwise to the above mixture to make the pH of the solution equal to 10, then add a certain amount of NaOH to transfer the mixture to a hydrothermal Then heat the reactor at 140°C for 24 hours; wash it with deionized water until it is neutral, and soak it with 0.01M HCl solution for 1.2 hours; finally wash it with deionized water several times, and then was...

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Abstract

The invention discloses a preparation method of a magnetically-separatable TNTs / g-C3N4 nano-composite material. The TNTs / Fe3O4-g-C3N4 nano-composite material is synthesized through in situ growth of Fe3O4 nano-particles and TiO2 nano-tubes (TNTs) on a g-C3N4 sheet under an alkaline hydrothermal condition by using g-C3N4, a water-soluble ferrous salt and a ferric iron salt as raw materials in orderto utilize the magnetic responsibility of the Fe3O4 and the excellent photocatalytic activity of graphitic carbon nitride (g-C3N4). The invention also discloses the magnetically-separatable TNTs / g-C3N4 nano-composite material prepared by the method. The magnetically-separatable TNTs / g-C3N4 nano-composite material has good magnetism, and the saturation magnetization intensity is 28.26 emu / g, so the separation and recovery of the composite material can be achieved; and the methylene blue removal rate of the TNTs / Fe3O4-g-C3N4 nano-composite material is 98.8% when illumination is carried out for60 min, and the prepared TNTs / Fe3O4-g-C3N4 nano-composite material has excellent adsorption performance, photocatalytic activity and magnetism, and can be separated and recovered by applying a magnetic field.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalytic magnetic materials, in particular to a magnetically separable TNTs / g-C 3 N 4 Preparation methods of nanocomposites. Background technique [0002] Semiconductor photocatalytic oxidation technology uses visible light or ultraviolet light to degrade organic matter in the environment into water and carbon dioxide, which has broad application prospects in air purification, sterilization and deodorization, and wastewater treatment. Among the current semiconductor photocatalytic materials, titanium dioxide nanotubes (TNTs) are considered to be one of the most promising photocatalysts due to their large specific surface area and high electron-hole separation efficiency. However, in the application of photocatalytic treatment of wastewater, TNTs have the disadvantages of difficult solid-liquid separation and low catalytic activity under visible light, which limit the application of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCC02F1/30B01J27/24C02F2305/10C02F2101/40B01J35/33B01J35/39
Inventor 张平韩立娟周银柯霆李红娟何婷婷
Owner NORTHWEST UNIVERSITY FOR NATIONALITIES
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