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Magnetic molecular sieve loaded TiO2 composite photocatalyst and preparation method thereof

A technology of magnetic molecules and compound light, which is applied in the field of adsorption porous materials and photocatalysis, can solve the problems of difficult separation and low catalytic efficiency, and achieve the effects of high-efficiency recovery, improved photocatalytic activity, and narrowed bandgap width

Pending Publication Date: 2021-02-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a magnetic molecular sieve loaded TiO 2 The composite photocatalyst and its preparation method solve the problems of low catalytic efficiency and difficult separation after use of traditional photocatalysts

Method used

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  • Magnetic molecular sieve loaded TiO2 composite photocatalyst and preparation method thereof
  • Magnetic molecular sieve loaded TiO2 composite photocatalyst and preparation method thereof
  • Magnetic molecular sieve loaded TiO2 composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 6.96 g of silica, 12.82 g of deionized water, 2.72 g of aluminum sulfate, 0.2 g of sodium hydroxide, and 2.0 g of trimethyladamantyl ammonium hydroxide into a 100 mL beaker, then add 0.5 g of molecular sieve seed crystals and stir 3 h to prepare the initial molecular sieve gel, add 10 g of nano-iron ferric oxide dispersion with a solid mass fraction of 25% to the initial gel, ultrasonically disperse for 1 h, put it into a stainless steel reactor and put it in an oven at 165 ℃ for 24 h, the obtained product was washed with deionized water three times, dried and ground at 100 ℃ to obtain a magnetic molecular sieve sample.

[0026]Measure 10 mL of tetrabutyl titanate and 18 mL of absolute ethanol and mix it as liquid A, then measure 3 mL of deionized water and 10 mL of absolute ethanol and mix it as liquid B, stir vigorously for 20 minutes at the same time, add dropwise to liquid A Add 2 mL of glacial acetic acid, and add 4.2 g of prepared magnetic molecular sieves, sl...

Embodiment 2

[0032] Add 6.96 g of white carbon black, 12.82 g of deionized water, 2.72 g of aluminum sulfate, 0.1 g of sodium hydroxide, and 1.0 g of trimethyladamantyl ammonium hydroxide into a 100 mL beaker, then add 0.2 g of molecular sieve seed crystals and stir 3 h to prepare the initial molecular sieve gel, add 10 g of nano-iron ferric oxide dispersion with a solid mass fraction of 25% to the initial gel, ultrasonically disperse for 1 h, put it into a stainless steel reactor and put it in an oven at 165 ℃ for 24 h, the obtained product was washed with deionized water three times, dried and ground at 100 ℃ to obtain a magnetic molecular sieve sample.

[0033] Measure 10 mL of tetrabutyl titanate and 18 mL of absolute ethanol and mix it as liquid A, then measure 3 mL of deionized water and 10 mL of absolute ethanol and mix it as liquid B, stir vigorously for 20 minutes at the same time, add dropwise to liquid A Add 2 mL of glacial acetic acid, and add 4.2 g of prepared magnetic molecul...

Embodiment 3

[0035] Add 6.96 g of silica, 12.82 g of deionized water, 2.72 g of aluminum sulfate, 0.2 g of sodium hydroxide, and 2.0 g of trimethyladamantyl ammonium hydroxide into a 100 mL beaker, then add 0.5 g of molecular sieve seed crystals and stir 3 h to prepare the initial molecular sieve gel, add 10 g of nano-iron ferric oxide dispersion with a solid mass fraction of 25% to the initial gel, ultrasonically disperse for 1 h, put it into a stainless steel reactor and put it in an oven at 170 ℃ for 12 h, the obtained product was washed three times with deionized water, dried and ground at 100 ℃ to obtain a magnetic molecular sieve sample.

[0036] Measure 10 mL of tetrabutyl titanate and 18 mL of absolute ethanol and mix it as liquid A, then measure 3 mL of deionized water and 10 mL of absolute ethanol and mix it as liquid B, stir vigorously for 20 minutes at the same time, add dropwise to liquid A Add 2 mL of glacial acetic acid, and add 4.2 g of prepared magnetic molecular sieves, s...

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Abstract

The invention discloses a magnetic molecular sieve loaded TiO2 composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: mixing deionized water, white carbon black, aluminum sulfate, sodium hydroxide and a template agent in proportion, conducting uniform stirring at normal temperature to prepare a molecular sieve precursor, adding nano Fe3O4 into the precursor, carrying out ultrasonic treatment, and putting a treated material into a reaction kettle to carry out hydrothermal synthesis to obtain a magnetic molecular sieve; then with tetrabutyl titanate as a titanium source, adding the magnetic molecular sieve before sol-gel hydrolysis, then adding glacial acetic acid to promote gelling, conducting aging at room temperature after gelling is finished, then putting a formed product into a drying oven for drying, conducting grinding to form a powder, and putting the powder into a tube furnace for calcining under nitrogen protection, so asto obtain the magnetic molecular sieve loaded TiO2 composite photocatalyst. Through three-phase compounding of TiO2, Fe3O4 and SSZ-13 molecular sieves, the light absorption capacity of the catalyst is improved, compounding of photo-induced electrons and holes is reduced and inhibited, and the photocatalytic efficiency is improved; and due to the introduction of Fe3O4, the material can be repeatedly used after being magnetically separated and recycled.

Description

technical field [0001] The invention relates to a magnetic molecular sieve loaded TiO 2 A composite photocatalyst and a preparation method thereof belong to the technical field of adsorption porous materials and photocatalysis. Background technique [0002] As a new method of degrading organic pollutants, photocatalytic oxidation has developed rapidly in the field of wastewater treatment. Nano-TiO 2 Photocatalytic materials are favored by researchers because of their high catalytic activity, stable chemical properties, non-toxicity and low cost. However, nano-TiO 2 There are still several problems in the application of TiO: 2 Poor compatibility with organic matter and low adsorption efficiency; TiO 2 The material has a large band gap and a small visible light response range; TiO 2 Nanoparticles are small in size, easy to agglomerate before the reaction, and difficult to recover after the reaction. [0003] In response to these problems, the researchers proposed to nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J21/06B01J29/90B01J35/00C02F1/32C02F101/30
CPCB01J29/763B01J29/90B01J21/063C02F1/32B01J2229/20C02F2305/10C02F2101/308B01J35/39B01J35/33
Inventor 任轶轩刘喜喜史凯赵旭张红智李晓峰
Owner TAIYUAN UNIV OF TECH
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