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Fluorine-doped TiO2/SBA-15 photocatalyst and application of fluorine-doped TiO2/SBA-15 photocatalyst in organic pollutant degradation

A photocatalyst and fluorine-doped technology, which is applied in the direction of physical/chemical process catalysts, water pollutants, molecular sieve catalysts, etc., can solve the problems that limit the application of TiO2, achieve high visible light catalytic activity, significant degradation efficiency, and improve adsorption capacity. Effect

Pending Publication Date: 2021-03-30
阜阳莱纳环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the nano-TiO 2 The band gap of TiO is wide, and only under the irradiation of ultraviolet light, electrons in the valence band can be excited to transition to the conduction band to form photogenerated electrons and holes, thus greatly restricting the TiO 2 Applications in the field of environmental engineering

Method used

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  • Fluorine-doped TiO2/SBA-15 photocatalyst and application of fluorine-doped TiO2/SBA-15 photocatalyst in organic pollutant degradation
  • Fluorine-doped TiO2/SBA-15 photocatalyst and application of fluorine-doped TiO2/SBA-15 photocatalyst in organic pollutant degradation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A fluorine-doped TiO 2 The photocatalyst of / SBA-15, its preparation method comprises:

[0019] S1. Add 1g of SBA-15 molecular sieve into 10mL ammonium fluoride aqueous solution (1mol / L), stir and mix for 0.5h, then hydrothermally react at 200°C for 8h, cool to room temperature, filter and wash with deionized water, Dry for 16 hours to obtain fluorine-modified SBA-15 molecular sieve;

[0020] S2. Add 4 mL of tetrabutyl titanate and 1 mL of glacial acetic acid into 20 mL of absolute ethanol and stir to obtain a tetrabutyl titanate ethanol solution; add 1 g of fluorine-modified SBA-15 molecular sieve to the above titanic acid under stirring conditions In tetrabutyl ethanol solution, after stirring for 0.5h, ultrasonically treat for 1h under the condition of frequency 45KHz; then add nitric acid solution (0.5mol / L) dropwise under stirring condition and stir for 0.5h, adjust the pH value to 2, continue Stirring for 1 hour, airtight aging for 24 hours, drying at 90°C for 1...

Embodiment 2

[0022] A fluorine-doped TiO 2 The photocatalyst of / SBA-15, its preparation method comprises:

[0023] S1. Add 1g of SBA-15 molecular sieve to 10mL of sodium fluoride aqueous solution (1mol / L), stir and mix for 0.5h, then hydrothermally react at 180°C for 10h, cool to room temperature, filter and wash with deionized water, Dry for 16 hours to obtain fluorine-modified SBA-15 molecular sieve;

[0024] S2. Add 5mL of tetrabutyl titanate and 1.5mL of glacial acetic acid into 20mL of absolute ethanol and stir to obtain a tetrabutyl titanate ethanol solution; add 1g of fluorine-modified SBA-15 molecular sieve to the above titanium After stirring for 0.5h, ultrasonic treatment was performed at a frequency of 45KHz for 1h; then nitric acid solution (0.5mol / L) was added dropwise under stirring and stirred for 0.5h to adjust the pH value to 2. Continue to stir for 1 hour, seal and age for 24 hours, dry at 80°C for 14 hours, and then calcinate at 450°C for 4 hours to obtain the fluorin...

Embodiment 3

[0026] A fluorine-doped TiO 2 The photocatalyst of / SBA-15, its preparation method comprises:

[0027] S1. Add 1g of SBA-15 molecular sieve to 10mL of hydrogen fluoride aqueous solution (1mol / L), stir and mix for 0.5h, then hydrothermally react at 200°C for 6h, cool to room temperature, filter and wash with deionized water, and dry at 120°C for 16h , to obtain fluorine-modified SBA-15 molecular sieve;

[0028] S2. Add 2 mL of tetrabutyl titanate and 0.5 mL of glacial acetic acid into 20 mL of absolute ethanol and stir to obtain a tetrabutyl titanate ethanol solution; add 1 g of fluorine-modified SBA-15 molecular sieve to the above titanium After stirring for 0.5h, ultrasonic treatment was performed at a frequency of 45KHz for 1h; then nitric acid solution (0.5mol / L) was added dropwise under stirring and stirred for 0.5h to adjust the pH value to 2. Continue to stir for 1 hour, seal and age for 24 hours, dry at 100°C for 10 hours, and then calcinate at 550°C for 2 hours to ob...

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Abstract

According to the present invention, the invention provides a fluorine-doped TiO2 / SBA-15 photocatalyst and application of the fluorine-doped TiO2 / SBA-15 photocatalyst in organic pollutant degradation,and the photocatalyst is prepared through adoption of the following method the steps of: carrying out a surface fluorination treatment reaction on an SBA-15 molecular sieve and fluoride to obtain a fluorine-modified SBA-15 molecular sieve; and carrying out a sol-gel reaction on a titanium source and the fluorine-modified SBA-15 molecular sieve, drying, and calcining to obtain the fluorine-doped TiO2 / SBA-15 photocatalyst. The photocatalyst has a more efficient visible light utilization rate, and when the photocatalyst is used for treating organic pollutants in wastewater, the degradation rate of the photocatalyst can reach 98% or above.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide photocatalysts, in particular to a fluorine-doped TiO 2 / SBA-15 photocatalyst and its application in the degradation of organic pollutants. Background technique [0002] TiO 2 It is favored by people because of its stable chemical properties, high catalytic activity, low cost, and non-toxicity. It is the most studied photocatalyst today. Its application range is extremely wide, and it has huge potential application value in sewage treatment, air purification, sterilization, leather industry, cosmetics and other fields. It can not only convert light energy into chemical energy, but also photocatalytically oxidize most organic pollutants in water and air, including dyes, surfactants, pesticides and other toxic organic pollutants that are difficult to biodegrade, degrade the final The product is CO 2 , H 2 O and other inorganic ions. In recent years, it has been found that there are mo...

Claims

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Application Information

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IPC IPC(8): B01J29/03C02F1/30C02F101/38
CPCB01J29/0308C02F1/30C02F2305/10C02F2101/40B01J35/39
Inventor 程鹏周典曹雨
Owner 阜阳莱纳环保科技有限公司
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