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Defect type TNTs composite material capable of achieving magnetic separation and preparation method thereof

A composite material, defect-type technology, applied in the field of photocatalytic materials, can solve the problems of low photocatalytic activity, difficult solid-liquid separation, limitations, etc., to achieve the effect of improving separation ability, expanding visible light response range, and improving stability

Pending Publication Date: 2019-08-13
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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  • Defect type TNTs composite material capable of achieving magnetic separation and preparation method thereof
  • Defect type TNTs composite material capable of achieving magnetic separation and preparation method thereof
  • Defect type TNTs composite material capable of achieving magnetic separation and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A preparation method of a magnetically separable defect-type TNTs composite material, comprising the following steps:

[0024] 1) Weigh a certain amount of P 25 Disperse in deionized water, sonicate for 0.5h, stir for 0.5h to ensure complete mixing, and then add a certain amount of FeCl with a molar ratio of 1.5:1 3 ·6H 2 O and FeSO 4 ·7H 2 O, then continue to sonicate for 15 minutes and stir for 15 minutes to ensure complete mixing;

[0025] 2) Add 1M 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 reactor, and then heat the reactor at 120°C for 24 hours ;

[0026] 3) After cooling, wash with deionized water until neutral, and soak in 0.01M HCl solution for 1 hour;

[0027] 4) Wash several times with deionized water, then wash several times with absolute ethanol for magnetic separation, dry in vacuum at 60°C, N 2 Calcining at 250° C. for 50 min und...

Embodiment 2

[0029] A preparation method of a magnetically separable defect-type TNTs composite material, comprising the following steps:

[0030] 1) Weigh a certain amount of P 25 Disperse in deionized water, sonicate 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 15 minutes and stir for 15 minutes to ensure complete mixing;

[0031] 2) Add 1M 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 reactor, and then heat the reactor at 120°C for 24 hours ;

[0032] 3) After cooling, wash with deionized water until neutral, and soak in 0.01M HCl solution for 1 hour;

[0033] 4) Wash several times with deionized water, then wash several times with absolute ethanol for magnetic separation, dry in vacuum at 60°C, N 2 Calcining at 300° C. for 60 min under...

Embodiment 3

[0035] A preparation method of a magnetically separable defect-type TNTs composite material, comprising the following steps:

[0036] 1) Weigh a certain amount of P 25 Disperse in deionized water, sonicate for 0.5h, stir for 0.5h to ensure complete mixing, 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 15 minutes and stir for 15 minutes to ensure complete mixing;

[0037] 2) Add 1M 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 reactor, and then heat the reactor at 120°C for 24 hours ;

[0038] 3) After cooling, wash with deionized water until neutral, and soak in 0.01M HCl solution for 1 hour;

[0039] 4) Wash several times with deionized water, then wash several times with absolute ethanol for magnetic separation, dry in vacuum at 60°C, N 2 Calcining at 350° C. for 70 minutes und...

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Abstract

The invention discloses a defect type TNTs composite material capable of achieving magnetic separation and a preparation method thereof. P25, a water-soluble divalent iron salt and a trivalent ferriciron salt are used as raw materials, and Fe3O4 nanoparticles grow in situ on TiO2 nanotubes (TNTs) under an alkaline hydrothermal condition to synthesize the defect type TNTs composite material capable of achieving magnetic separation. The prepared Fe3O4-TNTs nanocomposite material capable of achieving magnetic separation has a good magnetic property, the saturation magnetization strength is 22.60emu / g, and the separation and recovery of the composite material can be achieved; when illumination is carried out for 120 minutes, the removal rate of methylene blue by the magnetic Fe3O4-TNTs nanocomposite material is 99.67%, and the prepared defect type TNTs composite material capable of achieving magnetic separation has excellent adsorption performance, photocatalytic activity and magnetism and can be separated and recovered through an externally applied magnetic field.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a magnetically separable defect-type TNTs composite material and a preparation method thereof. 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 photocatal...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/30C02F101/38
CPCB01J23/745C02F1/30C02F2101/40C02F2305/10B01J35/39B01J35/33
Inventor 张平韩立娟林佳宏米海刚杨钰洁安召赵凤香秦莲
Owner NORTHWEST UNIVERSITY FOR NATIONALITIES
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