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Preparation method of a molecular/ion imprinted composite photocatalyst

An ion imprinting, photocatalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. It has problems such as selectivity to achieve the effect of improving selective target recognition and improving photocatalytic activity

Active Publication Date: 2015-08-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the patent CN101961662B, an ion-imprint-loaded composite photocatalyst was prepared by light-induced ion imprinting technology to improve the photocatalytic degradation ability of the target object, but This composite photocatalyst has no selectivity; in the patent CN102319591B, a molecularly imprinted modified composite photocatalyst that can selectively degrade target molecules is prepared by molecular imprinting technology, but the photocatalytic activity of this catalyst is not high
In addition, Huo Pengwei et al. (Huo Pengwei, Yan Yongsheng, Li Songtian, Li Huaming, Huang Weihong. Preparation of poly-o-phenylenediamine / TiO2 / fly-ash cenospheres and its photo-degradation property on antibiotics. Applied Surface Science, Vol. 256, No.11, (2010) 3380-3385.) Poly-o-phenylenediamine / titanium dioxide / fly ash bleached pearlescent catalyst was prepared by light-induced polymerization technology and its application in the photoactivity of antibiotics Research has been done on the degradation performance. Although the photocatalytic activity has been improved, it is not selective; Xinlin Liu et al. (Xinlin Liu, Peng Lv, Guanxin, Yao, et al, Effect of Chlorine-Doped TiO2 Photocatalysts for Photocatalytic Activity, Asian Journal of Chemistry; Vol. 25, No. 6 (2013) 3275-3278.) In order to improve the photocatalytic activity, a photocatalyst was prepared by sol-gel technology, but the prepared catalyst was non-selective

Method used

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  • Preparation method of a molecular/ion imprinted composite photocatalyst

Examples

Experimental program
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Embodiment 1

[0027] (1) The floating beads obtained by purchasing fly ash microbeads (Pingdingshan Yaomeng Power Plant) through water flotation, and then rinsing, acidifying, roasting and other treatments to obtain activated floating beads; respectively measure 10mL tetrabutyl titanate and 40mL Mix ethanol and stir the solution at a constant speed for 30 minutes, then add 1mL concentrated hydrochloric acid, 15mL distilled water and 100mL absolute ethanol drop by drop, and stir rapidly until it is in the form of a sol, that is, the prepared TiO 2 sol; the pretreated activated floating beads were immersed in TiO 2 In the sol, stir at a constant speed until it becomes uniform to gel, age at room temperature for 12 hours, and calcine in the air atmosphere, raise the temperature to 400 ° C, and keep it for 4 hours, and naturally cool to room temperature to obtain TiO 2 / floating bead-supported photocatalyst.

[0028] (2) TiO obtained in the above step (1) 2 / The mixed solution of the float...

example 2

[0032] (1) The floating beads obtained by purchasing fly ash microbeads (Pingdingshan Yaomeng Power Plant) through water flotation, and then rinsing, acidifying, roasting, etc. to obtain activated floating beads; respectively measure 10mL tetrabutyl titanate and 50mL Mix ethanol and stir the solution at a constant speed for 30 minutes, then add 1mL concentrated hydrochloric acid, 15mL distilled water and 150mL absolute ethanol drop by drop, and stir quickly until it is in the form of a sol, that is, the prepared TiO 2 sol; the pretreated activated floating beads were immersed in TiO 2 In the sol, stir at a constant speed until it becomes uniform to gel, age at room temperature for 14 hours, and calcine in the air atmosphere, raise the temperature to 500 ° C, and keep it for 6 hours, and naturally cool to room temperature to obtain TiO 2 / floating bead-supported photocatalyst.

[0033] (2) TiO obtained in the above step (1) 2 / The mixed solution of the floating bead-suppor...

example 3

[0039] (1) The floating beads obtained by purchasing fly ash microbeads (Pingdingshan Yaomeng Power Plant) through water flotation were processed by rinsing, acidification, roasting, etc. to obtain activated floating beads; 10mL tetrabutyl titanate and 70mL ethanol were pressed Mix and stir the solution at a constant speed for 30 minutes, then add 1mL of concentrated hydrochloric acid, 15mL of distilled water and 200mL of absolute ethanol drop by drop, and stir quickly until it is in the form of a sol, that is, the prepared TiO 2 sol; the pretreated activated floating beads were immersed in TiO 2 In the sol, stir at a constant speed until it becomes uniform to gel, age at room temperature for 16 hours, and calcine in the air atmosphere, raise the temperature to 600 ° C, and keep it for 8 hours, and naturally cool to room temperature to obtain TiO 2 / floating bead-supported photocatalyst.

[0040] (2) TiO obtained in the above step (1) 2 / The mixed solution of the floating...

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Abstract

The invention relates to a method for preparing a selective degraded molecular imprinting photocatalyst. The method adopts a preparation principle: firstly, enabling rare earth metal ions to be matched with terramycin antibiotics; secondly, adopting the complex as template molecules, and utilizing an ionic imprinting technology to graft the template molecules to the surfaces of POPD / TiO2 / coal ash floating beads; thirdly, adopting ultraviolet radiation to degrade and remove the terramycin antibiotics complex in an imprinting template; finally, obtaining an imprinting photocatalytic material containing rare earth metal ions, and further realizing the high-efficiency selective photocatalytic degradation of terramycin antibiotics. The method creatively adopts molecules and metal ions to form the complex and uses the complex as the template molecules of a molecularly imprinted polymer. After coordinated molecules are removed, selective target molecules and iron active sites for increasing catalytic activity are left on the synthetic imprinting photocatalyst. The selectivity is realized, and meanwhile the activity of photocatalytic degradation of the imprinting catalyst is also increased.

Description

technical field [0001] The invention relates to a method for preparing a composite photocatalyst modified by lanthanum-oxytetracycline template molecule surface molecule / ion imprinting by using sol-gel-photoinitiated polymerization modification-coordinating pre-assembly-surface molecular imprinting method, in particular to a The invention discloses a method for preparing a molecular / ion imprinted composite photocatalyst, which belongs to the technical field of preparation of functional environment-friendly materials. Background technique [0002] In recent years, a large number of antibiotics have been used in the breeding industry as animal medicine and food additives to control the occurrence of diseases and shorten the growth cycle of animals. This phenomenon is becoming more and more common. Such as tetracycline antibiotics, mainly including oxytetracycline, tetracycline, chlortetracycline, doxycycline, as a class of broad-spectrum antibiotics have been widely used in an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38A62D3/17A62D101/26A62D101/28
Inventor 陈康敏霍鹏伟刘馨琳闫永胜潘建明逯子扬倪良
Owner JIANGSU UNIV