Method for preparing Lewis acidic molecular imprinting type BiOI photo-catalyst with visible-light response and high selectivity by hydrothermal method

A highly selective, molecularly imprinted technology, used in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. Good results

Inactive Publication Date: 2013-09-11
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, BiOI photocatalytic degradation is not selective

Method used

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  • Method for preparing Lewis acidic molecular imprinting type BiOI photo-catalyst with visible-light response and high selectivity by hydrothermal method
  • Method for preparing Lewis acidic molecular imprinting type BiOI photo-catalyst with visible-light response and high selectivity by hydrothermal method
  • Method for preparing Lewis acidic molecular imprinting type BiOI photo-catalyst with visible-light response and high selectivity by hydrothermal method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 0.79 g 2-nitrophenol, 0.004mol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 80 mL of ethylene glycol solution and 1.0 g of polyvinylpyrrolidone (K30), and 0.004 mol of potassium iodide was added to the above ethylene glycol solution. The solution was stirred at room temperature for 30 min and then transferred to 100 mL of polytetrafluoroethylene for reaction. in the cauldron. The reaction kettle was reacted at 140°C for 24 h, then cooled to room temperature naturally, the synthesized product was washed three times with ethanol and deionized water, and then methanol:hydrochloric acid (volume ratio 1:1) mixture was used as the eluent, and passed through Soxhlet The extraction method removes the template molecule to obtain the Lewis acid molecularly imprinted BiOI photocatalyst. Such as figure 1 , 2 , 3, and 4, the Lewis acid molecularly imprinted BiOI photocatalyst prepared by the present invention has visible light response, good selectivity to target organic pollutants, an...

Embodiment 2

[0026] 0.79 g 2-nitrophenol, 0.004mol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 80 mL of ethylene glycol solution and 1.0 g of polyvinylpyrrolidone (K30), and 0.004 mol of 1-vinyl-3-methylimidazolium iodide ionic liquid was added to the above ethylene glycol solution, and the solution was stirred at room temperature After 30 min, it was transferred to a 100 mL polytetrafluoroethylene-lined reactor. The reaction kettle was reacted at 140°C for 24 h, then cooled to room temperature naturally, the synthesized product was washed three times with ethanol and deionized water, and then methanol:hydrochloric acid (volume ratio 1:1) mixture was used as the eluent, and passed through Soxhlet The extraction method removes the template molecule to obtain the Lewis acid molecularly imprinted BiOI photocatalyst. The Lewis acid molecularly imprinted BiOI photocatalyst prepared by the invention has visible light response, good selectivity to target organic pollutants, and high degradation effic...

Embodiment 3

[0028] 0.79 g 2-nitrophenol, 0.004mol Bi(NO 3 ) 3 ·5H 2O is dissolved in 80mL of ethylene glycol solution and 1.0g polyvinylpyrrolidone (K30), 0.002mol iodide 1-vinyl-3-methylimidazolium ionic liquid and 0.002mol potassium iodide are added in the above-mentioned ethylene glycol solution, the solution After stirring at room temperature for 30 min, it was transferred to a 100 mL polytetrafluoroethylene-lined reactor. The reaction kettle was reacted at 140°C for 24 h, then cooled to room temperature naturally, the synthesized product was washed three times with ethanol and deionized water, and then methanol:hydrochloric acid (volume ratio 1:1) mixture was used as the eluent, and passed through Soxhlet The extraction method removes the template molecules to obtain the Lewis acid molecularly imprinted BiOI photocatalyst.

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Abstract

The invention relates to a method for preparing a Lewis acidic molecular imprinting type BiOI photo-catalyst with visible-light response and high selectivity by a hydrothermal method. The method comprises the steps of: preassembling Bi<3+> with template molecules by interaction of Lewis acid and alkaline and an electrostatic effect; obtaining a BiOI framework combined with the template molecules in stirring and hydrothermal processes at normal temperature; then with a mixed solution of methanol and hydrochloric acid (of which the volume ratio is 1:1) as an eluant, and removing the template molecules by a Soxhlet extraction method to finally obtain the Lewis acidic molecular imprinting type BiOI photo-catalyst with visible-light response and high selectivity. The method has the remarkable advantages that the preparation conditions are mild; the Lewis acidic molecular imprinting type BiOI photo-catalyst has visible-light response and high mechanical strength; the molecular recognition site is not easy to be damaged; and the photo-catalyst has good selectivity and high degradation efficiency to target organic pollutants, can remarkably reduce the concentration of the target pollutants in landscape recycled water, and simultaneously farthest retains the organic nutritional ingredient in water.

Description

technical field [0001] The invention relates to a preparation method of a Lewis acid molecularly imprinted BiOI photocatalyst, in particular to a method for preparing a Lewis acid molecularly imprinted BiOI photocatalyst with visible light response and high selectivity at low temperature by a hydrothermal method. Background technique [0002] my country is one of the countries with serious shortage of water resources in the world, and the per capita water resources are only 1 / 4 of the world's per capita water resources. In regions such as the Yangtze River Delta and the Pearl River Delta, the rapid increase in regional population, rapid industrial and agricultural development, and environmental pollution brought about by economic development have led to increasingly serious water quality and water shortage problems that have existed for a long time. With the improvement of people's living standards and the quality of living environment, people's requirements for landscape ec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J37/10
Inventor 邓芳闵露娟罗旭彪陈德志罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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