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Photocatalytic nano composite material having magnetic response property and preparation method thereof

A nanocomposite material and photocatalytic technology, applied in the photocatalytic nanocomposite material with magnetic response properties and its preparation, in the field of photocatalytic nanomaterials, can solve the problems of high cost, poor photocatalytic activity, low solar energy utilization rate and the like

Inactive Publication Date: 2013-05-22
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, TiO 2 As a photocatalyst, there are two major shortcomings. One is that solid-liquid separation is difficult, and recycling cannot be realized, and the cost is high; the other is that the photocatalytic activity in the visible light region is poor, and the utilization rate of solar energy is low.

Method used

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  • Photocatalytic nano composite material having magnetic response property and preparation method thereof
  • Photocatalytic nano composite material having magnetic response property and preparation method thereof
  • Photocatalytic nano composite material having magnetic response property and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Raw materials: by weight

[0040] Fe 3 o 4 Particles (average particle size 30~50nm) 5 parts; ethanol 100 parts, butyl titanate 20 parts, organic montmorillonite 6 parts, acetic acid 2 parts, water 60 parts.

[0041] Preparation Process:

[0042] (1) First disperse the organic montmorillonite in 50 parts of ethanol, sonicate for 2 hours, let stand for 10 minutes, extract the supernatant to obtain the organic montmorillonite dispersion;

[0043] (2) Fe 3 o 4 Disperse the particles in 50 parts of ethanol, sonicate for 1 hour; add butyl titanate, and continue sonicating for 1 hour to obtain a mixed microemulsion;

[0044] (3) Add the mixed microemulsion to the above-mentioned organic montmorillonite dispersion, and ultrasonically vibrate at 20°C for 1h; under magnetic stirring, drop in the aqueous solution of acetic acid (composed of water and acetic acid) at a rate of 1 drop / 3s , hydrolyzed for 1 h under magnetic stirring; then mechanically stirred at 50°C for 1 h, ...

Embodiment 2

[0047] Raw materials: by weight

[0048] 10 parts of nickel ferrite particles (average particle size 50~100nm), 200 parts of isopropanol, 50 parts of titanium tetrachloride, 15 parts of organic montmorillonite, 5 parts of hydrochloric acid, 150 parts of water.

[0049] Preparation Process:

[0050] (1) Disperse the organic montmorillonite in 100 parts of isopropanol, ultrasonicate for 3 hours, let it stand for 10 minutes, extract the supernatant to obtain the organic montmorillonite dispersion;

[0051] (2) Disperse the nickel ferrite particles in 100 parts of isopropanol, and sonicate for 2 hours; add titanium tetrachloride, and continue to sonicate for 2 hours to obtain a mixed microemulsion;

[0052] (3) Add the mixed microemulsion to the above-mentioned organic montmorillonite dispersion, and oscillate ultrasonically at 30°C for 2 hours; under magnetic stirring, add the hydrochloric acid aqueous solution (composed of water and hydrochloric acid) at a rate of 1 drop / 3s , ...

Embodiment 3

[0055] Raw materials: by weight

[0056] Fe 3 o 4 Particles (average particle size 30~50nm) 18 parts, propanol 300 parts, titanium tetrachloride 60 parts, organic montmorillonite 20 parts, sulfuric acid 5 parts, water 100 parts.

[0057] Preparation Process:

[0058] (1) Disperse the organic montmorillonite in 200 parts of propanol, ultrasonicate for 2.5 hours, let stand for 10 minutes, extract the supernatant to obtain the organic montmorillonite dispersion;

[0059] (2) Fe 3 o 4 Disperse the particles in 100 parts of propanol, sonicate for 1.5h; add titanium tetrachloride, and continue sonicating for 1.5h to obtain a mixed microemulsion;

[0060] (3) Add the mixed microemulsion to the above-mentioned organic montmorillonite dispersion, and ultrasonically vibrate at 2.5°C for 1.5h; drop in the aqueous solution of sulfuric acid (composed of water and sulfuric acid) at a rate of 1 drop / 3s under magnetic stirring ), continue to hydrolyze under magnetic stirring for 1.5h; t...

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Abstract

The invention provides a photocatalytic nano composite material having magnetic response property, belonging to the technical field of photocatalysts. The preparation method of the photocatalytic nano composite material comprises the following steps: by using alcohol as a dispersion medium and organic montmorillonite as a template, intercalating a mixed microemulsion of magnetic particles and a titanium source into lamellae of the organic montmorillonite under ultrasonic conditions, thus forming a thermodynamically stable system; then, adding an acid solution to initiate hydrolysis so as to generate TiO2, and ensuring that the magnetic particles and the TiO2 are simultaneously intercalated into the lamellae of the montmorillonite; and finally, attracting the product with a magnet, washing with anhydrous ethanol, and drying to obtain the photocatalytic nano composite material having magnetic response property. Thus, the invention solves the problem that solid-liquid separation is difficult in the photocatalyst, and has good application prospects in the photocatalytic degradation of organic waste water. Besides, in the preparation process provided by the invention, the intercalation and hydrolysis of the emulsion of the magnetic particles and the photocatalytic particles are synchronously performed, thereby effectively simplifying the composite material preparation procedure, shortening the process period, lowering the cost and being beneficial to industrial production.

Description

technical field [0001] The technical field of composite materials of the present invention relates to a photocatalytic nano material, in particular to a photocatalytic nano composite material with magnetic response performance and a preparation method thereof. Background technique [0002] Environmental and energy issues are one of the hot research areas at present. Semiconductor photocatalytic oxidation technology can use solar energy to degrade organic matter in the environment into water and carbon dioxide. The degradation of organic pollutants by semiconductor photocatalytic materials has the advantages of low reaction temperature, high efficiency, easy operation and environmental friendliness, and has attracted increasing attention. Among the current semiconductor photocatalytic materials, TiO 2 Due to its stable chemical properties, good acid and alkali resistance, non-toxicity, strong oxidation ability, abundant sources, low cost, and good catalytic performance, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/755
Inventor 莫尊理张平张春韩立娟郭瑞斌
Owner NORTHWEST NORMAL UNIVERSITY
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