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Magnetically separable tnts/g-c 3 no 4 Preparation method and application of nanocomposite materials

A nanocomposite material, g-c3n4 technology, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc., can solve problems such as difficult solid-liquid separation, low photocatalytic activity, and limitations, Achieve the effects of solving the difficulty of recycling, improving the separation efficiency of electrons and holes, and expanding the response range of visible light

Active Publication Date: 2021-05-28
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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  • Magnetically separable tnts/g-c <sub>3</sub> no <sub>4</sub> Preparation method and application of nanocomposite materials
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  • Magnetically separable tnts/g-c <sub>3</sub> no <sub>4</sub> Preparation method and application of nanocomposite materials

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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, and 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 ...

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 magnetically separable TNTs / g-C 3 N 4 Preparation method of nanocomposite material, in order to utilize Fe 3 o 4 Magnetic responsivity and graphitic carbon nitride (g‑C 3 N 4 ) excellent photocatalytic activity, expressed in g‑C 3 N 4 ,P 25 , water-soluble ferrous salt and ferric salt as raw materials, under alkaline hydrothermal conditions, Fe 3 o 4 Nanoparticles and TiO 2 Nanotubes (TNTs) at g‑C 3 N 4 In situ growth on sheets to synthesize TNTs / Fe 3 o 4 / g‑C 3 N 4 nanocomposites. The invention also discloses the magnetically separable TNTs / g-C prepared by the above method 3 N 4 nanocomposites. Magnetically separable Fe 3 o 4 ‑TNTs / g‑C 3 N 4 The nanocomposite material has good magnetism, and the saturation magnetization is 28.26emu / g, which can realize the separation and recovery of the composite material; when the light is 60min, the Fe 3 o 4 ‑TNTs / g‑C 3 N 4 The removal rate of methylene blue by the nanocomposite was 98.8%, and the prepared Fe 3 o 4 ‑TNTs / g‑C 3 N 4 Nanocomposites have excellent adsorption properties, photocatalytic activity and magnetism, and can be separated and recycled by an external 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 Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24B01J35/0033B01J35/004C02F1/30C02F2101/40C02F2305/10
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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