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Visible light nano composite photocatalysis material and preparation method thereof

A photocatalytic material and composite photocatalytic technology, applied in the field of visible light nanocomposite photocatalytic material AgSbO3/SnO2 and its preparation, can solve the problems of reducing catalyst activity and stability, and achieve the effect of improving stability and improving stability

Inactive Publication Date: 2015-08-05
HUBEI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It shows that in the photocatalytic reaction, silver ions are reduced to metallic silver, which reduces the activity and stability of the catalyst

Method used

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  • Visible light nano composite photocatalysis material and preparation method thereof

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Embodiment 1

[0018] The visible light nanocomposite photocatalytic material of the present invention is made of AgSbO 3 with SnO 2 Composite.

[0019] The specific steps of the preparation method of the visible light nanocomposite photocatalytic material of the present invention are as follows:

[0020] Take 0.02moL AgNO 3 Dissolve in 100mL deionized water, NaSbO 3 with AgNO 3 Mix and stir for 0.5h according to the molar ratio of 1:1, then press Sn(OH) 4 : AgNO 3 =0.3:1 molar ratio to add Sn(OH) 4 , stirred and mixed for 1h, poured into the reaction kettle, reacted at 150°C for 20 hours, and dried by centrifugation to obtain AgSbO 3 / SnO 2 Composite photocatalytic nanomaterials.

[0021] The Sn(OH) 4 The preparation method is as follows:

[0022] SnCl 4 ·5H 2 O is dissolved in dilute hydrochloric acid with a pH between 1 and 2, and dilute ammonia water with a concentration of 0.5 mol / L is gradually and slowly added dropwise, SnCl 4 ·5H 2 The molar ratio of O to dilute ammoni...

Embodiment 2

[0024] The visible light nanocomposite photocatalytic material of the present invention is made of AgSbO 3 with SnO 2 Composite.

[0025] The specific steps of the preparation method of the visible light nanocomposite photocatalytic material of the present invention are as follows:

[0026] Take 0.02moL AgNO 3 Dissolve in 100mL deionized water, NaSbO 3 with AgNO 3 Mix and stir for 2 hours according to the molar ratio of 1.3:1, and then press Sn(OH) 4 : AgNO 3 =0.4:1 molar ratio to add Sn(OH) 4 , stirred and mixed for 3 hours, poured into the reaction kettle, reacted for 10 hours at 200°C, and dried by centrifugation to obtain AgSbO 3 / SnO 2 Composite photocatalytic nanomaterials.

[0027] The Sn(OH) 4 The preparation method is as follows:

[0028] SnCl 4 ·5H 2 O is dissolved in dilute hydrochloric acid with a pH between 1 and 2, and dilute ammonia water with a concentration of 0.5 mol / L is gradually and slowly added dropwise, SnCl 4 ·5H 2 The molar ratio of O to...

Embodiment 3

[0030] The visible light nanocomposite photocatalytic material of the present invention is made of AgSbO 3 with SnO 2 Composite.

[0031] The specific steps of the preparation method of the visible light nanocomposite photocatalytic material of the present invention are as follows:

[0032] Take 0.02moL AgNO 3 Dissolve in 100mL deionized water, NaSbO 3 with AgNO 3 Mix and stir for 1h according to the molar ratio of 1.1:1, then press Sn(OH) 4 : AgNO 3 =0.6:1 molar ratio to add Sn(OH) 4 , stirred and mixed for 2 hours, poured into the reaction kettle, reacted for 15 hours at 180°C, and dried by centrifugation to obtain AgSbO 3 / SnO 2 Composite photocatalytic nanomaterials.

[0033] The Sn(OH) 4 The preparation method is as follows:

[0034] SnCl 4 ·5H 2 O is dissolved in dilute hydrochloric acid with a pH between 1 and 2, and dilute ammonia water with a concentration of 0.5 mol / L is gradually and slowly added dropwise, SnCl 4·5H 2 The molar ratio of O to dilute am...

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Abstract

The invention discloses a visible light nano composite photocatalysis material and a preparation method thereof. According to the invention, AgSbO3 and SnO2 are composited, because that conduction band position of AgSbO3 is higher than the conduction band position of SnO2, in a photocatalysis reaction, photo-generated electrons on the AgSbO3 conduction band are capable of moving to the SnO2 conduction band, silver ions of AgSbO3 can not be reduced by photo-generated electrons, and thereby stability can be effectively improved. Simultaneously, the photo-generated electrons on the SnO2 and O2 in a degradation solution are reacted to generate superoxide radical (O<2-.>), HOO.HO.free radical can be generated in order, the active groups have strong activity, organic pollutants can be degraded, and the method can increase the stability of a silver-containing compound. The experiment result shows that the degradation rate of the composite photocatalysis material on methylene blue under visible light irradiation can reach more than 95% in 60 minutes.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a visible light nanocomposite photocatalytic material AgSbO 3 / SnO 2 and its preparation method. Background technique [0002] Currently the most widely used TiO 2 Photocatalysts have excellent activity and stability, but require ultraviolet light (only 4.5% of the solar spectrum) to be excited to produce photocatalytic activity, which severely limits its practical application. Therefore, it is very necessary to synthesize novel photocatalysts that can effectively utilize the visible light (accounting for 45% of the solar spectrum) in sunlight. One of the strategies is to develop new and more efficient visible-light photocatalysts (such as CdS, WO 3 ,Cu 2 O, Bi 2 o 3 etc.), it has been practically applied in solar energy purification of environmental pollution. Among many new photocatalysts, Ag-based catalysts such as Ag 3 PO 4 , AgSbO 3 、Ag 2 O, AgVO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/68
Inventor 梁英
Owner HUBEI UNIV OF ARTS & SCI
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