Preparation method of flowerlike BiOI-Ti bionic compound catalytic film and application thereof

A catalytic film and flower-like technology, applied in the field of preparation of flower-like BiOI-Ti biomimetic composite catalytic films, can solve the problems of difficulty in meeting the requirements for use, affecting the photocatalytic efficiency of BiOI, restricting applications, etc., achieving excellent photocatalytic activity, improving Photocatalytic performance, the effect of improving the removal rate

Inactive Publication Date: 2019-02-26
泰州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The bismuth-based semiconductor material bismuth oxyiodide (BiOI) has been widely concerned by researchers because of its unique layered structure and narrow energy band gap (1.7-1.9ev), which exhibits high catalytic activity under visible light. Although BiOI It is regarded as a new type of photocatalytic material with high efficiency, non-toxicity and excellent catalytic performance, but the practical application of BiOI materials still has a high probability of recombining with holes during the migration process of photogenerated electrons, which greatly affects the biological properties of BiOI materials. photocatalytic efficiency
It is difficult to meet the use requirements when dealing with some industrial wastewater containing refractory organic matter or organic matter with a high concentration and a large amount.
TiO 2 The lattice contains more defects and vacancies, which generate more holes and photogenerated electrons, and have higher catalytic activity; however, TiO 2 The forbidden band width of TiO is 3.2ev, which leads to it can only absorb the ultraviolet light region with a small wavelength range, which greatly limits the TiO 2 Application in Practical Photocatalytic Degradation of Organic Pollutants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a flower-shaped BiOI-Ti biomimetic composite catalytic membrane, the preparation method consists of the following steps:

[0033] (1) Preparation of composite photocatalyst BiOI-Ti: Weigh 0.05mmol bismuth nitrate pentahydrate Bi(NO 3 ) 3 ·5H 2 O was dispersed in 20ml ethanol and ultrasonicated for 0.5h to obtain Bi(NO 3 ) 3 ·5H 2 O suspension; weigh 0.05mmol KI and dissolve it in 20ml deionized water to obtain a KI solution; slowly add the above KI solution dropwise to Bi(NO 3 ) 3 ·5H 2 O suspension, vigorously magnetically stirred for 1 hour; then 200 μl of titanium tetraisopropoxide was dropped into the above mixture, and magnetically stirred for 0.5 hour; the above mixture was poured into a 50ml reaction kettle, and the reaction kettle was placed in an oven. Hydrothermal reaction at 180°C for 2 hours; naturally cooled to room temperature, the product was washed three times with deionized water and absolute ethanol, centrifuged, and drie...

Embodiment 2

[0037] A preparation method of a flower-shaped BiOI-Ti biomimetic composite catalytic membrane, the preparation method consists of the following steps:

[0038] (1) Preparation of composite photocatalyst BiOI-Ti: Weigh 0.05mmol bismuth nitrate pentahydrate Bi(NO 3 ) 3 ·5H 2 O was dispersed in 20ml ethanol and ultrasonicated for 0.5h to obtain Bi(NO 3 ) 3 ·5H 2 O suspension; weigh 0.05mmol KI and dissolve it in 20ml deionized water to obtain a KI solution; slowly add the above KI solution dropwise to Bi(NO 3 ) 3 ·5H 2 O suspension, vigorously magnetically stirred for 1 hour; then 200 μl of titanium tetraisopropoxide was dropped into the above mixture, and magnetically stirred for 0.5 hour; the above mixture was poured into a 50ml reaction kettle, and the reaction kettle was placed in an oven. Hydrothermal reaction at 180°C for 2 hours; naturally cooled to room temperature, the product was washed three times with deionized water and absolute ethanol, centrifuged, and drie...

Embodiment 3

[0042] A preparation method of a flower-shaped BiOI-Ti biomimetic composite catalytic membrane, the preparation method consists of the following steps:

[0043] (1) Preparation of composite photocatalyst BiOI-Ti: Weigh 0.05mmol bismuth nitrate pentahydrate Bi(NO 3 ) 3 ·5H 2 O was dispersed in 20ml ethanol and ultrasonicated for 0.5h to obtain Bi(NO 3 ) 3 ·5H 2 O suspension; weigh 0.05mmol KI and dissolve it in 20ml deionized water to obtain a KI solution; slowly add the above KI solution dropwise to Bi(NO 3 ) 3 ·5H 2 O suspension, vigorously magnetically stirred for 1 hour; then 200 μl of titanium tetraisopropoxide was dropped into the above mixture, and magnetically stirred for 0.5 hour; the above mixture was poured into a 50ml reaction kettle, and the reaction kettle was placed in an oven. Hydrothermal reaction at 180°C for 2 hours; naturally cooled to room temperature, the product was washed three times with deionized water and absolute ethanol, centrifuged, and drie...

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Abstract

The invention discloses a preparation method of a flowerlike BiOI-Ti bionic compound catalytic film and application thereof. The preparation method comprises the following steps: first, doping titanium in bismuth oxyiodide (BiOI) in a compound photocatalyst BiOI-Ti; and then loading the compound photocatalyst BiOI-Ti to a bionic compound film PAD@PVDF to obtain the BiOI-Ti / PDA@PVDF biotic compoundcatalytic film. The method of preparing the bionic compound catalytic film is free of harmful intermediate products and is a green and environment-friendly preparation method. The prepared bionic compound catalytic film plays roles of adsorbing, degrading and separating, and can remove antibiotics molecules in an aqueous solution effectively. The bionic compound catalytic film has excellent photocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of preparation of environmental functional materials, in particular to a preparation method and application of a flower-shaped BiOI-Ti biomimetic composite catalytic membrane. Background technique [0002] Antibiotics are produced by the metabolism of microorganisms. Antibiotics are chemical substances that can effectively inhibit and kill bacteria, mycoplasma, chlamydia, and various pathogenic microorganisms. Therefore, it has shown great application value in human clinical medicine, animal medicine, and crop pest control. However, long-term use of antibiotics will increase the amount of antibiotic residues in animals. People who eat foods containing antibiotic residues for a long time will cause the accumulation of antibiotics in the body, break the normal micro-ecological balance of the human body, make the human body develop drug resistance, and cause various tissue and organ lesions. Even cancerous. T...

Claims

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Application Information

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IPC IPC(8): B01J27/135C02F1/30
CPCC02F1/30B01J27/135C02F2305/10B01J35/59B01J35/39
Inventor朱禹吕华程曼宋娟朱文菲
Owner泰州学院