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Photocatalysis material possessing hud structure of photoluminescent property, and preparation method

A technology of photocatalytic materials and core-shell structure, which is applied in the field of fluorescent core-shell structure photocatalytic materials and their preparation, can solve the problems of consumption, inability to meet the needs of photocatalytic materials, multiple surfactants and organic solvents, and achieve The process equipment is simple, easy to detect, and the effect of low price

Inactive Publication Date: 2007-10-10
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method needs to consume a lot of surfactants and organic solvents
Therefore, in general, these methods alone cannot meet the demand for photocatalytic materials in industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] TiO 2 : Preparation of RB core-shell structured photocatalytic materials

[0014] First add 20mL of absolute ethanol, 12mL of ammonia water and 5mL of distilled water into a 100mL reaction flask and stir evenly, then add a mixture of 4.02mL of tetraethyl orthosilicate and 30mL of absolute ethanol, and continue stirring for 8 hours. Then the reaction solution was centrifuged, the supernatant was poured out, washed with distilled water and then centrifuged, repeated three times, and the product was vacuum-dried at 50°C for 24 hours to obtain the required monodisperse SiO 2 Microspheres. At room temperature, the monodisperse SiO 2 Ultrasonic disperse 0.5g microspheres into 0.005mol / L RB ethanol solution, add 30ml containing 2mol / L HCl and TiCl 4 aqueous solution. Stir and heat in a water bath for 5 hours. Centrifuge, wash with distilled water, repeat several times, and dry in vacuum at 50°C for 24 hours to obtain SiO 2 @TiO 2 : RB core-shell structured photocatalyti...

Embodiment 2

[0016] Fe 2 o 3 : Preparation of RB core-shell structured photocatalytic materials

[0017] First add 20mL of absolute ethanol, 12mL of ammonia water and 10mL of distilled water into the reaction flask and stir evenly, then add the mixture of 4.02mL of tetraethyl orthosilicate and 30mL of absolute ethanol, continue to stir for 8 hours, and then put the reaction centrifugation, pouring out the supernatant, washing with distilled water and centrifugation, repeated three times, the product was vacuum-dried at 50°C for 24 hours to obtain the desired monodisperse SiO 2 Microspheres. At room temperature, the monodisperse SiO 2 Microspheres 0.5g ultrasonically dispersed to 1×10 -3 mol / L RB aqueous solution, then add 0.42g K 4 Fe(CN) 6 , 0.78g of (NH 4 ) 2 S 2 o 8 and 0.22 g of NaH 2 PO 4 , stir well. The solution was then sealed in a polytetrafluoroethylene reactor, hydrothermally treated at 180°C for 8 hours, and filtered to obtain dark red Fe 2 o 3 , washed with deio...

Embodiment 3

[0019] Preparation of ZnO: RB core-shell structure photocatalytic material

[0020] First add 28mL of absolute ethanol, 15mL of ammonia water and 10mL of distilled water into the reaction flask and stir evenly, then add the mixture of 4.02mL of tetraethyl orthosilicate and 30mL of absolute ethanol, continue to stir for 6 hours, and then put the reaction centrifugation, pouring out the supernatant, washing with distilled water and centrifugation, repeated three times, the product was vacuum-dried at 50°C for 24 hours to obtain the desired monodisperse SiO 2 Microspheres. At room temperature, the monodisperse SiO 2 Microspheres 0.25g ultrasonically dispersed to 2×10 -3 mol / L RB aqueous solution, then add 0.55g Zn(CH 3 COO) 2 2H 2 O and 0.334mL ethylenediamine, after continuing to stir, hydrothermally treat at 160°C for 12h, and cool the reaction solution to room temperature. The product was collected and washed repeatedly with distilled water and absolute ethanol, then dri...

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Abstract

A photocatalyst with fluorescent core-shell nano-structure has an expression formula: SiO2@AxMy:RB, where x=0-2, y=0-3, A is chosen from Ti, Fe, Zn, Pb and Ag, M is chosen from O and S, and RB is rhodamine used as both fluorescent marker and surfactant. Its preparing process features that the spherical SiO2 particles with controllable diameter is used as core, and the dye rhodamine is embedded in the core-shell nano-structure.

Description

Technical field: [0001] The invention belongs to a preparation method of a core-shell structure photocatalytic material with fluorescent properties Background technique: [0002] As inorganic solid functional materials, photocatalytic materials have been widely used in various fields such as the degradation of catalytic pollutants, the preparation of fine chemical reagents, and the comprehensive utilization of energy, and play an irreplaceable role in the national economy and daily life. With the development of society, people have put forward higher requirements on the catalytic activity, selectivity and manufacturing cost of catalytic materials. Because core-shell materials have large specific surface area, regular shape, controllable material size, stable performance and product quality It has many advantages such as easy recycling and reuse, so it has broad application prospects in the field of catalysis. Rhodamine dyes are widely used in laser and fluorescent labeling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J21/06C09K11/06
Inventor 刘景林杨伏勇褚莹董丽红李丽丽张艳萍
Owner NORTHEAST NORMAL UNIVERSITY
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