Preparation method of nitrogen-doped attapulgite load nano TiO2 visible light photocatalyst

A kind of attapulgite and visible light technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low utilization rate of natural light of photocatalysts, and achieve the effect of improving photocatalytic performance

Inactive Publication Date: 2010-12-29
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004] The second is pure nano TiO 2 The problem of low utilization rate of natural light in photocatalysts
However, most of the studies so far...

Method used

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  • Preparation method of nitrogen-doped attapulgite load nano TiO2 visible light photocatalyst
  • Preparation method of nitrogen-doped attapulgite load nano TiO2 visible light photocatalyst
  • Preparation method of nitrogen-doped attapulgite load nano TiO2 visible light photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0025] Get calcined and purified attapulgite mineral powder 10g, 300ml deionized water and 1ml concentrated hydrochloric acid to add in the there-necked flask Stir to make slurry, stir evenly and then take TiCl 4 Solution 20ml (2.71mol / L) is added in the flask; Measure ammonium sulfate solution (200g / L) 20.8ml and add reaction system; 30% concentrated ammonia water and deionized water are made into the ammonia solution drop that volume ratio is 1: 1.5 Add it to the slurry, and stop dropping when the pH value of the system is 8.0; react at a temperature of 70°C for 1 hour and then filter and wash with water; the washed filter cake is dried at 105°C and dispersed in a muffle furnace for 600 Calcination at ℃ for 2h.

Embodiment 2

[0027] Take 100g of the purified attapulgite, 3000ml of deionized water and 10ml of concentrated hydrochloric acid and add them into the laboratory reaction kettle to stir and make slurry. After stirring evenly, take TiCl 4 Solution 200ml (2.71mol / L) is added in the flask; Measure ammonium sulfate solution (200g / L) 200ml and add reaction system; 30% concentrated ammonia water and deionized water are made into the ammonia solution that volume ratio is 1: 2.0 dropwise into the slurry at a rate of 2.2ml / min; stop the dropwise addition when the pH value of the system is 9.0; react at a temperature of 70°C for 1.5h and then filter and wash with water; the washed filter cake is dried at 105°C and beaten After dispersing, heat-preserve and calcinate at 400°C for 2 hours in a muffle furnace.

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Abstract

The invention relates to a method for preparing a load N-doped nano TiO2 visible light photocatalyst by using natural porous mineral attapulgite as a carrier, belonging to the technical field of mineral material processing and photocatalysis. The method comprises the following steps of: adding water and hydrochloric acid to calcined and purified attapulgite mineral powder, stirring and pulping the attapulgite mineral powder, and then adding a TiCl4 solution and a (NH4)2SO4 solution; adding an ammonia water solution to regulate pH and carrying out hydrolyzing and precipitating load and N-doped reaction by using NH4+ as a nitrogen source; and filtering, washing, drying and calcining a reaction product to obtain the nitrogen-doped attapulgite load nano TiO2 visible light photocatalyst. The prepared N-doped attapulgite load nano TiO2 visible light photocatalyst reduces the forbidden band width of TiO2 to below 2.8 eV from 3.0-3.2 eV and can obviously improve the photocatalysis performance of the nano TiO2 under visible light; and the degradation rate of the catalyst for formaldehyde within 8 h under the visible light reaches above 90%.

Description

technical field [0001] The invention relates to a kind of natural porous mineral attapulgite as carrier, loaded with N-doped nano-TiO 2 The invention discloses a preparation method of a visible light catalyst, which belongs to the technical field of mineral material processing and photocatalysis. technical background [0002] Since the 1970s, nano-TiO 2 It has been proved to be a photocatalytic material with high efficiency, non-toxicity and stable performance. But there are two problems in actual use. [0003] One is pure nano TiO 2 Poor dispersibility and difficult to recycle and reuse. Loading it on a carrier material that is easy to recycle is one of the main methods to solve its dispersibility and reusability at present. Currently researched nano-TiO 2 The carrier materials mainly include activated carbon, molecular sieve, zeolite, bentonite, sepiolite, glass, ceramics, silica, diatomaceous earth, etc. Attapulgite is a natural porous silicate mineral containing m...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J21/06B01J35/02B01J37/03B01J37/08A62D3/10A62D101/28
Inventor 郑水林刘月熊余文明贺洋
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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