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Vanadium-nitrogen codoped TiO2/attapulgite photocatalysis composite material and preparation thereof

A composite material and attapulgite technology, applied in the field of photocatalytic materials, can solve the problems of narrow spectral response range, difficult separation and recovery, and insufficient degradation rate

Inactive Publication Date: 2012-10-10
NATURAL ENERGY INST GANSU ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-TiO 2 There are two problems in the practical application of photocatalysts: first, due to the nano-TiO 2 The forbidden band is wide (Eg=3.2eV), the spectral response range is narrow, and it can only absorb ultraviolet light, but the ultraviolet light energy only accounts for 4%~6% of the solar energy on the ground, and the utilization rate of sunlight is only 3%; second, nano-TiO 2 The particle size of the photocatalyst is small, it is easy to lose in the reaction system, and there are problems such as difficult separation and recovery, which increases the processing cost, thus limiting the TiO 2 The Process of Realizing Industrialization of Photocatalyst
However, the vanadium-nitrogen co-doped TiO 2 The improvement of photocatalytic activity under visible light is not ideal, the degradation rate is not high enough, it is not easy to separate and recycle in the treatment of wastewater, and the cost is relatively high, which is not conducive to industrialization

Method used

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  • Vanadium-nitrogen codoped TiO2/attapulgite photocatalysis composite material and preparation thereof
  • Vanadium-nitrogen codoped TiO2/attapulgite photocatalysis composite material and preparation thereof
  • Vanadium-nitrogen codoped TiO2/attapulgite photocatalysis composite material and preparation thereof

Examples

Experimental program
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Embodiment 1

[0033] Purification of attapulgite: fully dissolve 1.5g of sodium pyrophosphate in 605ml of deionized water, heat to 30°C; add 30g of attapulgite original soil under stirring, let stand, extract the suspension; add 2mol / L HCL 100mL, heat Reflux at 80°C for 4 hours, wash until neutral; dry, grind, and pass through a 100-mesh sieve to obtain the purified attapulgite.

[0034] Vanadium-nitrogen co-doped TiO 2 / Preparation of attapulgite photocatalytic composite material: Dissolve 0.0043 g of ammonium metavanadate in the mixed phase of butyl titanate, ethanol, and diethanolamine (butyl titanate 9 mL, ethanol 9.5 mL, diethanolamine 0.5 mL), Under ice-water bath and strong stirring, add the above system into the mixture of acetic acid and deionized water (127 mL of deionized water, 8.5 mL of acetic acid), and continue to stir to form a sol-gel solution; then add the above-mentioned purified Attapulgite 4.4g, continuously stirred for 40min, aged for 12h; then dried in a drying oven...

Embodiment 2

[0037] The purification of attapulgite: with embodiment 1.

[0038] Vanadium-nitrogen co-doped TiO 2 / Attapulgite photocatalytic composite material preparation: Dissolve 0.016g of ammonium metavanadate in the mixed phase of butyl titanate, ethanol and diethanolamine (butyl titanate 5 mL, ethanol 17 mL, diethanolamine 1.1 mL), Under ice-water bath and strong stirring, add to the mixture of acetic acid and deionized water (165 mL of deionized water, 33 mL of acetic acid), and continue to stir to form a sol-gel solution; add 7.2 g of purified attapulgite, Stirring was continued for 70 minutes to obtain a white sol, which was aged for 18 hours; dried in a drying oven at a temperature of 100°C, ground, placed in a muffle furnace, and calcined at 400°C for 2 hours; the calcined powder was ground again, 100 Mesh sieve to prepare vanadium-nitrogen co-doped TiO 2 / Attapulgite Photocatalytic Composite Materials.

[0039] In composite materials, vanadium-nitrogen co-doped TiO 2 The...

Embodiment 3

[0041] The purification of attapulgite: with embodiment 1.

[0042] Vanadium-nitrogen co-doped TiO 2 / Attapulgite photocatalytic composite material preparation: Dissolve 0.0062g ammonium metavanadate in the mixed phase of butyl titanate, ethanol and diethanolamine (butyl titanate 5mL, ethanol 12.1mL, diethanolamine 0.2 mL), in Under ice water bath and strong stirring, add to the mixture of acetic acid and deionized water (deionized water 90mL, acetic acid 5mL), continue to stir to form a sol-gel solution; add 9.58g of purified attapulgite, and continue to stir for 60min , to obtain a white sol, aged for 16 hours; dried in a drying oven at a temperature of 90 ° C, ground, placed in a muffle furnace, and calcined at 450 ° C for 2.5 h; the calcined powder was ground again, and 100 mesh sieve , to prepare vanadium-nitrogen co-doped TiO 2 / Attapulgite Photocatalytic Composite Materials.

[0043] In composite materials, vanadium-nitrogen co-doped TiO 2 The mass ratio of photoc...

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Abstract

The invention provides a vanadium-nitrogen codoped TiO2 / attapulgite photocatalysis composite material which is prepared by loading vanadium-nitrogen codoped TiO2 on the attapulgite. The vanadium-nitrogen codoped TiO2 / attapulgite photocatalysis composite material has higher photocatalysis activity; and furthermore, the attapulgite is used as the load material of the vanadium-nitrogen codoped TiO2 photocatalyst, part of TiO2 is substituted by the attapulgite, so that the cost of the attapulgite-loaded vanadium-nitrogen codoped TiO2 photocatalysis composite material is lowered (the cost is only one fourth that of the vanadium-nitrogen codoped TiO2 photocatalyst), the composite material can obviously increases the degradation speed (which is four times that of vanadium-nitrogen codoped TiO2 and more than three times that of P-25) of methylene blue, thus being beneficial to industrialized application and popularization of a TiO2 photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials and relates to a vanadium-nitrogen co-doped TiO 2 / attapulgite photocatalytic composite material and its preparation method. Background technique [0002] The application of semiconductor photocatalysts to degrade organic pollutants has the characteristics of mild and efficient reaction, easy operation and control, and environmental friendliness, and has attracted increasing attention. Among the widely studied semiconductor photocatalytic materials, TiO 2 Due to the advantages of stable chemical properties, good acid and alkali resistance, non-toxicity, abundant sources, low cost, and good catalytic performance, it is considered to be a photocatalyst with the most application potential at present. Nano-TiO 2 There are two problems in the practical application of photocatalysts: first, due to the nano-TiO 2 The forbidden band is wide (Eg=3.2eV), the spectral response range is n...

Claims

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Application Information

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IPC IPC(8): B01J27/24A62D3/17A62D101/28
Inventor 安兴才刘刚韩立娟陈作雁喜文华
Owner NATURAL ENERGY INST GANSU ACAD OF SCI
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