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Preparation and application of novel photo-catalytic material SnO2@Fe2O3

A composite material, fe2o3 technology, applied in the field of preparation of nano-photocatalytic composite materials, can solve the problems that pure photocatalytic materials are difficult to meet, and achieve the effects of easy promotion, strong practicability, and simple preparation methods

Inactive Publication Date: 2017-08-04
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for pure photocatalytic materials to meet all requirements in photocatalysis. In order to improve photocatalytic activity and efficiency, new photocatalysts must be designed and synthesized.

Method used

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  • Preparation and application of novel photo-catalytic material SnO2@Fe2O3
  • Preparation and application of novel photo-catalytic material SnO2@Fe2O3
  • Preparation and application of novel photo-catalytic material SnO2@Fe2O3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) SnO 2 Nanoparticles are dispersed in ethanol solution to form a 0.1mg / mL solution.

[0045] (2) Take 4 mL of the solution dispersed in step (1) and sonicate for 10 min at an ultrasonic power of 50 W, add 8 drops of the prepared sodium amalgam and shake for 10 min.

[0046] (3) Remove the sodium amalgam in the solution of step (2), add 4 drops of 2mg / mLFe 2 o 3 The solution was placed in the reduced ethanol solution, and the ultrasonic power was 50W for 8 minutes. SnO can be obtained by centrifugal separation 2 @Fe 2 o 3 Nanophotocatalytic composites, TEM dispersed in ethanol as figure 2 As shown, the XRD analysis of nanomaterials as figure 1 shown.

[0047] (4) The prepared SnO 2 Nanoparticles, SnO 2 @Fe 2 o 3 Take 2 mg of the composite materials and dissolve them in 20 mL of methylene blue (10 mg / L) solution;

[0048] (5) Shake the solution for 10 minutes in the dark, so that the photocatalyst-pollutant molecules reach an adsorption-desorption equilibri...

Embodiment 2

[0052] (1) Take SnO 2 Nanoparticles are dispersed in ethanol solution to form a 0.1mg / mL solution.

[0053] (2) Take 4 mL of the solution dispersed in step (1) and sonicate for 8 min at an ultrasonic power of 50 W, add 6 drops of 4 mg / ml sodium borohydride solution, and shake for 10 min.

[0054] (3) Centrifuge the solution obtained in step (2), pour off the supernatant, then add 4ml of ethanol to ultrasonically disperse again, and then add 4 drops of 2mg / mLFe 2 o 3 solution, ultrasonic response. Ultrasonic 10min, ultrasonic power 100W. SnO can be obtained by filtration and separation 2 @Fe 2 o 3 Nanophotocatalytic composites. showed that SnO 2 @Fe 2 o 3 Nano-photocatalytic composite materials can be stably synthesized under different ultrasonic power and time, which provides raw materials for photocatalytic degradation of organic matter.

[0055] (5) SnO 2 Nanoparticles, SnO 2 @Fe 2 o 3 Take 2 mg of the composite materials and dissolve them in 20 mL of methylen...

Embodiment 3

[0059] (1) Take SnO 2 Nanoparticles are dispersed in ethanol solution to form a 0.1mg / mL solution.

[0060] (2) Take 4 mL of the solution dispersed in step (1) and sonicate for 8 min at an ultrasonic power of 50 W, add 8 drops of the prepared sodium amalgam and shake for 10 min.

[0061] (3) Remove the sodium amalgam in the solution of step (2), add 4 drops of 2mg / mLFe 2 o 3 The solution was placed in the reduced ethanol solution, and the ultrasonic power was 50W for 10min. Evaporate the solvent to get SnO 2 @Fe 2 o 3 Nanophotocatalytic composites. showed that SnO 2 @Fe 2 o 3 Nano-photocatalytic composite materials can be stably synthesized under different ultrasonic power and time, providing raw materials for photocatalytic degradation of organic matter.

[0062] (5) SnO 2 Nanoparticles, SnO 2 @Fe 2 o 3 Take 2 mg of the composite materials and dissolve them in 20 mL of methylene blue (10 mg / L) solution;

[0063] (6) Shake the solution for 10 minutes in the dark...

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Abstract

The invention provides a method for preparing a SnO2@Fe2O3 nano-photocatalytic composite material by utilizing an oxidative reduction mechanism. The method comprises the following steps: dispersing nano-SnO2 in a liquid-phase medium to obtain an SnO2 dispersing liquid; reducing Sn(IV) on the surface of the nano-SnO2 in the SnO2 dispersing liquid into a low oxidation state of tin in the presence of a reducing agent to obtain an SnO2 reducing liquid; uniformly mixing the SnO2 reducing liquid and an Fe2O3 solution, sufficiently reacting, separating a product to obtain the SnO2@Fe2O3 nano-photocatalytic composite material. The method has the advantages of simple operation, short time, low cost, environmental friendliness, good repeatability and high efficiency, can be used for quickly and effectively preparing a nano-photocatalytic composite material, and has universality and large-scale production values. The nano-photocatalytic composite material SnO2@Fe2O3 has an excellent ultraviolet-visible absorption range, can be used for greatly improving the photocatalytic degrading efficiency, and has a wide application prospect in the fields of water pollution treatment and organic waste treatment.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-photocatalytic composite materials, in particular to a novel photocatalytic material SnO 2 @Fe 2 o 3 preparation and application. Background technique [0002] Nowadays, domestic sewage, industrial wastewater, pesticide wastewater, etc. seriously endanger people's lives and even life safety. However, traditional sewage treatment methods can only remove insoluble substances, sand and other pollutants in sewage through filtration technology. However, for soluble organic waste The processing efficiency is low and the cost is high, even reaching the point where it cannot be processed. Photocatalytic technology uses sunlight to convert light energy into chemical energy, and promotes the conversion of most organic matter and some inorganic matter into small molecules such as water and carbon dioxide, thereby achieving the purpose of purifying the environment. It is a new technology with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B82Y40/00B82Y30/00C02F1/30C02F101/36C02F101/38
CPCB82Y30/00B82Y40/00C02F1/30B01J23/002B01J23/835C02F2305/10C02F2101/38C02F2101/40C02F2101/36B01J35/39
Inventor 李志华刘玉香付颖李娜马惠云唐波
Owner SHANDONG NORMAL UNIV