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Preparation method of visible light photo-catalyst

A photocatalyst and visible light technology, which is applied in the field of visible light photocatalyst preparation, can solve the problems of low utilization rate of visible light and low photon quantum efficiency, and achieve the effects of easy control of doping amount, simple process parameters and polymerization inhibition

Active Publication Date: 2018-06-01
陕西天璇涂层科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is: TiO 2 The problem of low utilization rate of visible light and low photon quantum efficiency

Method used

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  • Preparation method of visible light photo-catalyst
  • Preparation method of visible light photo-catalyst
  • Preparation method of visible light photo-catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Efficient preparation of nano AgCl / TiO by ion exchange method 2 The visible light photocatalyst, its specific steps are as follows:

[0028] (1) Take 10mL of tetrabutyl titanate and add it to 20mL of ethanol, and mix thoroughly to obtain ethanol solution A of tetrabutyl titanate, take 5mL of distilled water and add it to 25mL of ethanol, and mix thoroughly to obtain an ethanol solution mixed with distilled water b.

[0029] (2) Add solution B dropwise to solution A which is constantly stirring according to the volume ratio of 1:1. After adding solution B dropwise, stir the mixed solution under magnetic stirring for 5 minutes to obtain a sol.

[0030] (3) Pour the above sol into a hydrothermal reactor and react under high pressure at 140°C for 24h to obtain TiO 2 wet gel, dry the wet gel in an oven at 80°C for 24 hours to obtain a dry gel.

[0031] (4) Grind the obtained dry gel into a powder and sieve it under a 500-mesh sieve, and then calcinate at 400°C for 6h to o...

Embodiment 2

[0037] Efficient preparation of nano AgCl / TiO by ion exchange method 2 The visible light photocatalyst, its specific steps are as follows:

[0038] (1) Take 10mL of tetrabutyl titanate and add it to 30mL of ethanol, and mix thoroughly to obtain ethanol solution A of tetrabutyl titanate, take 5mL of distilled water and add it to 30mL of ethanol, and mix thoroughly to obtain an ethanol solution mixed with distilled water b.

[0039] (2) Add the solution B dropwise to the continuously stirring solution A according to the volume ratio of 1:1.2. After adding the solution B dropwise, stir the mixed solution under magnetic stirring for 5 minutes to obtain a sol.

[0040] (3) Pour the above sol into a hydrothermal reactor and react under high pressure at 160°C for 18 hours to obtain TiO 2 wet gel, dry the wet gel in an oven at 90°C for 22 hours to obtain a dry gel.

[0041] (4) Grind the obtained dry gel into a powder and sieve it under a 300-mesh sieve, and then calcinate at 500°C...

Embodiment 4

[0056] Efficient preparation of nano AgCl / TiO by ion exchange method 2 The visible light photocatalyst, its specific steps are as follows:

[0057] (1) Take 10mL of tetrabutyl titanate and add it to 50mL of ethanol, and mix thoroughly to obtain ethanol solution A of tetrabutyl titanate, take 5mL of distilled water and add it to 35mL of ethanol, and mix thoroughly to obtain an ethanol solution mixed with distilled water b.

[0058] (2) Add solution B dropwise to the constantly stirring solution A at a volume ratio of 1:1.5. After adding solution B dropwise, stir the mixed solution under magnetic stirring for 5 minutes to obtain a sol.

[0059] (3) Pour the above sol into a hydrothermal reactor and react under high pressure at 180°C for 16 hours to obtain TiO 2 wet gel, dry the wet gel in an oven at 100°C for 20 hours to obtain a dry gel.

[0060] (4) Grind the obtained dry gel into powder and sieve it under a 500-mesh sieve, and then calcinate at 600°C for 3h to obtain TiO ...

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Abstract

The invention relates to a preparation method of a visible light photo-catalyst and belongs to the technical field of photo-catalytic composite materials. The method includes steps of: a) with tetrabutyl titanate as a titanium source, performing sol-gel process and hydrothermal treatment to prepare a white solid, grinding the white solid into a powder, and sintering the powder in a muffle furnaceto prepare TiO2 powder; b) adding the TiO2 powder to an ionic exchange liquid and adding a less amount of an inhibitor to inhibit hydrolysis of the ionic exchange liquid, performing magnetic stirring,centrifugation and drying to obtain TiO2 powder of which the surface is supported with Cl<-> and Sn<2+> ions; c) adding the powder to an AgNO3 solution, and in a dark environment, fully stirring thesolution to obtain the nano AgCl / TiO2 which is uniformly dispersed and has very high photo-catalytic activity. In the AgCl / TiO2 visible light photo-catalyst, the nano AgCl is well-distributed on surface of the TiO2. Due to surface roughness of the TiO2 powder, agglomeration of nano-particles is effectively inhibited, so that the visible light photo-catalytic efficiency of the AgCl / TiO2 is significantly improved.

Description

technical field [0001] The invention relates to a preparation method of a visible light photocatalyst, belonging to the technical field of photocatalytic composite materials. Background technique [0002] With the rapid development of science and technology and modern industry, the pace of production in all walks of life has been continuously improved, and the resulting water pollution has become more and more serious. Photocatalytic oxidation technology is a water pollutant treatment technology that has attracted much attention in recent years and has been extensively studied. Anatase TiO 2 Because of its cheap, non-toxic, strong chemical stability and ability to degrade organic pollutants in the atmosphere and water, it has become a research hotspot in the field of photocatalysis. But since the TiO 2 The forbidden band width is about 3.2eV, the absorption wavelength is limited to the ultraviolet region, the solar light utilization rate is low, and the photogenerated ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J35/02B01J37/03B01J37/10B01J37/30B01J35/00
CPCB01J27/135B01J37/036B01J37/10B01J37/30B01J35/40B01J35/39
Inventor 冯晶杨琼连葛振华郭俊
Owner 陕西天璇涂层科技有限公司
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