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Preparation method of nitrogen-doped attapulgite-supported nano-tio2 visible light catalyst

An attapulgite and visible light technology, which is applied in 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: 2011-12-07
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 have focused on pure nano-TiO 2 Nitrogen doping research on photocatalysts, no support nano-TiO 2 Report on Nitrogen Doping of Composite Materials

Method used

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  • Preparation method of nitrogen-doped attapulgite-supported nano-tio2 visible light catalyst
  • Preparation method of nitrogen-doped attapulgite-supported nano-tio2 visible light catalyst
  • Preparation method of nitrogen-doped attapulgite-supported nano-tio2 visible light catalyst

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Experimental program
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Effect test

Embodiment 1

[0027] Take 10g of calcined and purified attapulgite powder, 300ml of deionized and 1ml of concentrated hydrochloric acid and add them into a three-necked flask and stir to make slurry. After stirring evenly, take TiCl 4 Add 20ml (2.71mol / L) of the solution into the flask; measure 20.8ml of ammonium sulfate solution (200g / L) and add it to the reaction system; make 30% concentrated ammonia water and deionized water into an ammonia solution with a volume ratio of 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

[0029] 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 Add 200ml (2.71mol / L) of the solution into the flask; measure 200ml of ammonium sulfate solution (200g / L) and add to the reaction system; make 30% concentrated ammonia water and deionized water into an ammonia solution with a volume ratio of 1:2.0 and add 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 preparation method of a natural porous mineral attapulgite as a carrier and loaded N-doped nano-TiO2 visible light catalyst, which belongs to the technical field of mineral material processing and photocatalysis. Add water and hydrochloric acid to the calcined and purified attapulgite ore powder, stir and make slurry, then add TiCl4 solution and (NH4)2SO4 solution; add ammonia solution to adjust pH, and use NH4+ as nitrogen source to carry out hydrolysis precipitation loading and N doping reaction; The reaction product is filtered, washed, dried and calcined to obtain a nitrogen-doped attapulgite-supported nano-TiO2 visible light catalyst. The prepared N-doped attapulgite-supported nano-TiO2 visible light catalyst reduces the band gap of TiO2 from 3.0 to 3.2eV to below 2.8eV, which can significantly improve the photocatalytic performance of nano-TiO2 under visible light; The degradation rate of formaldehyde reaches over 90% within 8 hours.

Description

Technical field [0001] The present invention involves a kind of natural porous mineral bumpbone as the carrier, load N doped nano TIO 2 It can be seen that the preparation method of photocatalysts belongs to the field of mineral material processing and photocatalytic technology. technical background [0002] Since the 1970s, nano TIO 2 It has been proven to be an efficient, non -toxic, and stable performance of photocatalytic materials.But there are two major problems in actual use. [0003] The first is pure nano TIO 2 Poor scattered and difficult to recycle reuse.Putting its load on the carrier material that is convenient for recycling is one of the main methods of current research to solve its decentralization and reusing.The current research is used for load nano TIO 2 The carrier materials mainly include activated carbon, molecular sieves, zigzag, pussy, sea bubbles, glass, ceramics, silicon, diatom soil, etc.Bumpbuilding is a natural porous silicate mineral with magnesium. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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