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Ag2O/AgNbO3 powder with excellent photocatalytic performance and preparation method thereof

A photocatalytic and powder technology, applied in chemical instruments and methods, chemical/physical processes, light water/sewage treatment, etc., to achieve mild preparation conditions, simple preparation process, and excellent performance

Active Publication Date: 2019-05-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of pure phase AgNbO by hydrothermal method 3 Powder, Ag prepared by simple co-precipitation method 2 O / AgNbO 3 Powder, present, Ag 2 O / AgNbO 3 This new type of photocatalyst has not been reported

Method used

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  • Ag2O/AgNbO3 powder with excellent photocatalytic performance and preparation method thereof
  • Ag2O/AgNbO3 powder with excellent photocatalytic performance and preparation method thereof
  • Ag2O/AgNbO3 powder with excellent photocatalytic performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1, the NH 4 HF 2 , Nb 2 o 5 with Ag 2 According to a certain molar ratio of O, pure phase AgNbO was prepared by hydrothermal method 3 Powder.

[0028] Step 2, 0.1mmol AgNbO 3 The powder was dispersed in 50ml deionized water, stirred for 30min, and ultrasonicated for 50min to obtain system A.

[0029] Step 3, 0.1mmolAgNO 3 Disperse in system A and stir for 5h to obtain mixed system B.

[0030] Step 4: Add 0.2 mol / L NaOH solution dropwise to the mixed system B at a rate of 7 ml, and adjust the pH of the mixed solution to 10 to obtain the mixed system C. The mixed system C was washed with deionized water until the solution was neutral, and then washed twice with alcohol, and the obtained product was dried at 40°C to obtain Ag 2 O / AgNbO 3 Powder.

[0031] figure 2 It is implementation case 1, the prepared photocatalyst degrades RhB diagram, the concentration of RhB is 10ppm, 50ml each time, under 300W xenon lamp as light source, visible light, degrades RhB...

Embodiment 2

[0033] Step 1, the NH 4 HF 2 , Nb 2 o 5 with Ag 2 According to a certain molar ratio of O, pure phase AgNbO was prepared by hydrothermal method 3 Powder.

[0034] Step 2, 0.2mmol AgNbO 3 The powder was dispersed in 50ml deionized water, stirred for 40min, and ultrasonicated for 50min to obtain system A.

[0035] Step 3, 0.4mol AgNO 3 Disperse in system A and stir for 8 hours to obtain mixed system B.

[0036] Step 4: Add 0.8 NaOH solution dropwise to the mixed system B at a rate of 8 ml, and adjust the pH of the mixed solution to 13 to obtain the mixed system C. The mixed system C was washed with deionized water until the solution was neutral, and then washed three times with alcohol, and the obtained product was dried at 60°C to obtain Ag 2 O / AgNbO 3 Powder.

[0037] Figure 4It is implementation case 2, the prepared photocatalyst degradation RhB diagram, the concentration of RhB is 10ppm, 50ml each time, under 300W xenon lamp as light source, visible light, degra...

Embodiment 3

[0039] Step 1, the NH 4 HF 2 , Nb 2 o 5 with Ag 2 According to a certain molar ratio of O, pure phase AgNbO was prepared by hydrothermal method 3 Powder.

[0040] Step 2, 0.3mmol AgNbO 3 The powder was dispersed in 50ml deionized water, stirred for 60min, and ultrasonicated for 50min to obtain system A.

[0041] Step 3, 0.7mmol AgNO 3 Disperse in system A and stir for 10 hours to obtain mixed system B.

[0042] Step 4: Add 0.5 mol / L NaOH solution dropwise to the B mixed system at a rate of 8 ml, adjust the pH of the mixed solution to 14, and obtain the mixed system C. The mixed system C was washed with deionized water until the solution was neutral, and then washed twice with alcohol, and the obtained product was dried at 50°C to obtain Ag 2 O / AgNbO 3 Powder.

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Abstract

The invention provides a preparation method of a novel photocatalyst. The preparation method includes the steps of preparing pure-phase AgNbO3 powder by a hydrothermal method, and preparing Ag2O / AgNbO3 powder by a precipitation method. The product obtained by the preparation method is composite powder formed by encapsulating AgNbO3 with Ag2O. The preparation method of the prepared novel photocatalyst is simple, and compared with AgNbO3 powder, the photocatalytic activity of the novel photocatalyst is greatly improved.

Description

technical field [0001] The invention relates to the technical field of powder preparation by hydrothermal method, specifically a kind of Ag with excellent photocatalytic performance 2 O / AgNbO 3 Powder and its preparation method. Background technique [0002] In recent years, with the rapid development of society, environmental issues have become more and more important, among which the treatment of sewage has become a hot topic in society. Water pollution mainly includes the following types, heavy metal pollution, paper pollution, industrial printing and dyeing wastewater chemical pollution, etc. These environmental problems will inevitably have a huge impact on people's lives and will inevitably affect the further development of society. In order to solve the problem of water pollution, we often use chemical oxidation, physical adsorption, microbial treatment and high-temperature incineration. These treatment methods can solve some environmental problems to a certain exte...

Claims

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Application Information

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IPC IPC(8): B01J23/68B01J35/10C02F1/30
Inventor 蒲永平杨梦蝶李经纬王雯史瑞科郭旭师裕
Owner SHAANXI UNIV OF SCI & TECH