Composite photocatalyst and preparation method thereof

A catalyst and composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limiting photocatalytic activity, narrow energy band gap, large silver carbonate particles, etc. The probability of agglomeration, improving the effective separation, the effect of large specific surface area

Inactive Publication Date: 2014-07-23
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the rapid development of the economy, the global energy shortage and environmental degradation are becoming increasingly serious. The application of photocatalytic technology to environmental pollution control has attracted widespread attention from scientists; however, photocatalytic materials have a large band gap and can use light sources The limitation severely restricts the development of photocatalytic technology, so it is of great practical significance to develop new photocatalysts with high-efficiency visible light response.
[0003] The energy band gap of silver

Method used

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  • Composite photocatalyst and preparation method thereof
  • Composite photocatalyst and preparation method thereof
  • Composite photocatalyst and preparation method thereof

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Embodiment 1

[0029] Embodiment 1: A visible light responsive g-C of the present invention 3 N 4 / Ag 2 CO 3 Composite photocatalyst and preparation method thereof, comprising the following steps:

[0030] (1) Put 0.0172 g of carbon nitride into 30 ml of deionized water for ultrasonic dispersion, and the ultrasonic dispersion time is 30 minutes.

[0031] (2) Add 0.6795 g of silver nitrate to the dispersion obtained in the first step, and ultrasonically disperse for 15 minutes.

[0032] (3) Add commercial-grade ammonia water with a mass concentration of 25-28% to the dispersion liquid obtained in the second step, and the addition amount is 0.5 ml.

[0033] (4) Add 0.336 g of sodium bicarbonate to the mixture obtained in the third step, and stir for 10 minutes.

[0034] (5) Drop dilute nitric acid into the mixture obtained in the fourth step, and keep stirring, test the pH with a glass rod, adjust it to 7, and then stir for 1 h.

[0035] (6) The product obtained in the fifth step w...

Embodiment 2

[0037] Embodiment 2: A visible light responsive g-C of the present invention 3 N 4 / Ag 2 CO 3 Composite photocatalyst and preparation method thereof, comprising the following steps:

[0038] (1) Put 0.056 g of carbon nitride into 30 ml of deionized water for ultrasonic dispersion, and the ultrasonic dispersion time is 60 minutes.

[0039] (2) Add 0.6795g of silver nitrate to the dispersion obtained in the first step, and ultrasonically disperse for 30 minutes.

[0040] (3) Add commercial-grade ammonia water with a mass concentration of 25-28% to the dispersion liquid obtained in the second step, and the addition amount is 0.5 ml.

[0041] (4) Add 0.0336 g of sodium bicarbonate to the mixture obtained in the third step, and stir for 15 minutes.

[0042] (5) Drop dilute nitric acid into the mixture obtained in the fourth step, and keep stirring, test the pH with a glass rod, adjust it to 7, and then stir for 1 h.

[0043] (6) The product obtained in the fifth step wa...

Embodiment 3

[0044] Embodiment 3: A visible light responsive g-C of the present invention 3 N 4 / Ag2 CO 3 Composite photocatalyst and preparation method thereof, comprising the following steps:

[0045] (1) Put 0.0418 g of carbon nitride into 30 ml of deionized water for ultrasonic dispersion, and the ultrasonic dispersion time is 90 minutes.

[0046] (2) Add 0.6795g of silver nitrate to the dispersion obtained in the first step, and ultrasonically disperse for 40 minutes.

[0047] (3) Add commercial-grade ammonia water with a mass concentration of 25-28% to the dispersion liquid obtained in the second step, and the addition amount is 0.5 ml.

[0048] (4) Add 0.0336 g of sodium bicarbonate to the mixture obtained in the third step, and stir for 20 minutes.

[0049] (5) Drop dilute nitric acid into the mixture obtained in the fourth step, and keep stirring, test the pH with a glass rod, adjust it to 7, and then stir for 1 h.

[0050] (6) The product obtained in the fifth step w...

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Abstract

The invention relates to a photocatalyst, and in particular relates to a carbon nitride/silver carbonate composite visible light photocatalyst and a preparation method thereof, belonging to the technical field of composite materials and photocatalysis in environmental management. The composite photocatalyst is formed by compounding g-C3N4 and Ag2CO3 in the mass ratio of 1:99-10:90. The preparation method comprises the following steps: putting carbon nitride into deionized water for ultrasonically dispersing; adding silver nitrate and ultrasonically dispersing; adding ammonia water and sodium bicarbonate; regulating the pH by using a dilute nitric acid solution; stirring for reacting for a certain period of time; centrifugally separating, washing and drying a product to obtain the g-C3N4/Ag2CO3 composite photocatalyst. Being proved by photocatalytic performance experiment research, the composite photocatalytic material has high photocatalytic activity. The composite photocatalyst is wide in visible light response range and high in photocatalytic activity, and has good application prospects and economic benefits on the aspects of sewage treatment, solar transformation and the like.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a carbon nitride / silver carbonate composite visible light photocatalyst and a preparation method thereof, belonging to the technical field of photocatalysis in composite materials and environmental treatment. Background technique [0002] With the rapid development of the economy, the global energy shortage and environmental degradation are becoming increasingly serious. The application of photocatalytic technology to environmental pollution control has attracted widespread attention from scientists; however, photocatalytic materials have a large band gap and can use light sources The limitation severely restricts the development of photocatalytic technology, so it is of great practical significance to develop new photocatalysts with high-efficiency visible light response. [0003] The energy band gap of silver carbonate is relatively narrow, only 2.30 eV, which is considered as an ideal ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J27/232A62D3/17A62D101/26A62D101/28
Inventor 许晖宋永秀李华明宋艳华张岐朱嘉祥朱婷婷
Owner JIANGSU UNIV
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