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AgVO3/Ag3PO4 heterojunction composite photocatalyst and preparation method and application thereof

A technology of composite light and catalyst, applied in the field of photocatalysis, can solve the problems of low separation rate of photogenerated carriers and affect photocatalytic activity, and achieve the effect of improving visible light catalytic activity and stability, good practical value, and accelerating separation

Inactive Publication Date: 2016-02-03
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this one-dimensional structure has the advantages of large specific surface area and easy electron transfer, the separation rate of photogenerated carriers in monomeric silver vanadate materials is still relatively low, which affects the photocatalytic activity. [4-6]

Method used

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  • AgVO3/Ag3PO4 heterojunction composite photocatalyst and preparation method and application thereof
  • AgVO3/Ag3PO4 heterojunction composite photocatalyst and preparation method and application thereof
  • AgVO3/Ag3PO4 heterojunction composite photocatalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0041] AgVO 3 / Ag 3 PO 4 Preparation method of heterojunction composite photocatalyst:

[0042] (1) Preparation of AgVO by hydrothermal synthesis 3 Nanobelt: 1.0mmolNH 4 VO 3 Dissolve in 30mL ultrapure water, heat to 80°C and stir continuously to dissolve completely; meanwhile, add 1.0mmolAgNO 3 Dissolve in 30mL ultrapure water, stir to dissolve, and obtain the solution respectively; then the above AgNO 3 The solution was added dropwise to the above NH 4 VO 3 In the solution, use 2.0mol / LNH 3 ·H 2 O solution to adjust the pH of the mixture to 7, and then continue to stir in the dark for 5 hours; after the stirring is completed, the suspension is obtained, and the suspension is transferred to a high-pressure reactor equipped with a polytetrafluoroethylene liner, and placed in an electric heating constant temperature blast drying Heat treatment at 180°C in the oven for 24 hours; after the reaction, cool the reactor to room temperature, and filter the product, after whi...

Embodiment 2

[0051] AgVO 3 / Ag 3 PO 4 Preparation method of heterojunction composite photocatalyst:

[0052] The difference from Example 1 is that adding 0.2mmolNa 3 PO 4 12H 2 O. Weigh the above obtained 1.0mmolAgVO 3 Nanobelts were added to 30mL ultrapure water, ultrasonically dispersed for 30min, and then magnetically stirred for 30min to obtain a dispersion; at the same time, 0.2mmolNa 3 PO 4 12H 2 O was added to 30mL ultrapure water, and magnetically stirred to make it dissolve completely to obtain a solution; then the above-mentioned Na 3 PO 4 The solution was added drop by drop to the above AgVO under magnetic stirring. 3 In the dispersion liquid, the mixed liquid was obtained, and then 2.0mol / LHNO 3 The solution adjusted the pH of the mixed solution to 7, and then continued to stir at room temperature for 8 hours in the dark; after the stirring was completed, the product was filtered by suction, and the precipitate after suction filtration was washed several times with ...

Embodiment 3

[0054] AgVO 3 / Ag 3 PO 4 Preparation method of heterojunction composite photocatalyst:

[0055] The difference from Example 1 is that adding 0.1mmolNa 3 PO 4 12H 2 O. Weigh the above obtained 1.0mmolAgVO 3 Nanobelts were added to 30mL ultrapure water, ultrasonically dispersed for 30min, and then magnetically stirred for 30min to obtain a dispersion; at the same time, 0.1mmol Na 3 PO 4 12H 2 O was added to 30mL ultrapure water, and magnetically stirred to make it dissolve completely to obtain a solution; then the above-mentioned Na 3 PO 4 The solution was added drop by drop to the above AgVO under magnetic stirring. 3 In the dispersion liquid, the mixed liquid was obtained, and then 2.0mol / LHNO 3 The solution adjusted the pH of the mixed solution to 7, and then continued to stir at room temperature for 8 hours in the dark; after the stirring was completed, the product was filtered by suction, and the precipitate after suction filtration was washed several times with...

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Abstract

The invention belongs to the field of photocatalysis and specifically relates to an AgVO3 / Ag3PO4 heterojunction composite photocatalyst and its preparation method and application. The AgVO3 / Ag3PO4 heterojunction composite photocatalyst is composed of AgVO3 and Ag3PO4. Ag3PO4 nanoparticles grow in situ on the surface of an AgVO3 nanoribbon, wherein molar ratio of AgVO3 to Ag3PO4 is 1:0.01-1. The preparation method of the invention has a simple process, is easy to control and is low-cost. An AgVO3 / Ag3PO4 heterojunction structure with visible light response is constructed, photon-generated carrier separation is accelerated, and recombination probability of photogenerated electron-hole pairs is minimized. The AgVO3 / Ag3PO4 heterojunction composite photocatalyst has high-efficiency photocatalytic activity and stability in visible light, has highly-efficient killing and degradation effects on harmful microbes and dye pollutants in a water body and has good practical value and potential application prospect in fields of water body purification and the like.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to an AgVO 3 / Ag 3 PO 4 Heterojunction composite photocatalyst and its preparation method and application. Background technique [0002] Photocatalytic technology is a technology that uses light energy for material conversion. Since 1972, Japanese scientists Fujishima and Honda first reported TiO 2 After the photolysis of water to produce hydrogen and oxygen under ultraviolet light, semiconductor photocatalysis technology has high efficiency, non-selectivity, high stability, green and non-toxic, no secondary pollution, low energy consumption, easy operation and low cost, etc. Outstanding advantages, and can make full use of clean and pollution-free solar energy, has received more and more attention [1] , in sewage treatment, waste gas treatment, air purification, sterilization, catalytic hydrogen production, reduction of CO 2 etc. have been widely used, and the effect is good. ...

Claims

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Application Information

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IPC IPC(8): B01J27/198A01N59/26A01P1/00C02F1/50C02F1/30B82Y30/00B82Y40/00C02F101/38
CPCY02W10/37
Inventor 鞠鹏张盾
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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