Preparation method for silver molybdate/carbonitride composite visible-light-driven photocatalyst

A technology of carbon nitride and visible light, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of less research on photocatalytic activity, and achieve easy control of preparation conditions and simple preparation methods , high catalytic efficiency

Inactive Publication Date: 2019-11-19
BENGBU COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cubic Ag / Ag was prepared by a harsh microwave-assisted hydrothermal method in the presence of polyvinylpyrrolidone 2 MoO 4 composite materials, however, people are concerned about the Ag 2 MoO 4 There are few studies on the photocatalytic activity of carbon molybdate and silver molybdate. Therefore, it is of great significance to prepare a composite material of silver molybdate and carbon nitride with high catalytic activity.

Method used

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  • Preparation method for silver molybdate/carbonitride composite visible-light-driven photocatalyst
  • Preparation method for silver molybdate/carbonitride composite visible-light-driven photocatalyst
  • Preparation method for silver molybdate/carbonitride composite visible-light-driven photocatalyst

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Effect test

Embodiment 1

[0019] Embodiment 1 A kind of preparation method of silver molybdate / carbon nitride composite visible light catalyst

[0020] (1) Add 5g of melamine to the crucible, cover the crucible, heat up from room temperature to 520°C, calcinate for 2h, cool to room temperature, grind the obtained sample into powder, and obtain the bulk phase g-C 3 N 4 , the heating rate is 2°C / min;

[0021] (2) The bulk phase g-C obtained in step (1) 3 N 4 Put it in a crucible with the top of the crucible open, heat up from room temperature to 520°C, calcinate for 4 hours, cool to room temperature, and grind the obtained sample into powder to obtain the ultra-thin g-C 3 N 4 -NS;

[0022] (3) The 0.3385g ultra-thin g-C obtained in step (2) 3 N 4 -NS dispersed in 8ml of water 30min after sonication, 3ml of 0.03M AgNO was added to it 3 aqueous solution, and then after magnetic stirring for 30min, slowly add 2ml of 0.03M Na 2 MoO 4 aqueous solution, after magnetic stirring for 1 hour, centrifuge ...

Embodiment 2

[0023] Embodiment 2 A kind of preparation method of silver molybdate / carbon nitride composite visible light catalyst

[0024] (1) Add 5g of melamine to the crucible, cover the crucible, heat up from room temperature to 520°C, calcinate for 2h, cool to room temperature, grind the obtained sample into powder, and obtain the bulk phase g-C 3 N 4 , the heating rate is 2°C / min;

[0025] (2) The bulk phase g-C obtained in step (1) 3 N 4 Put it in a crucible with the top of the crucible open, heat up from room temperature to 520°C, calcinate for 4 hours, cool to room temperature, and grind the obtained sample into powder to obtain the ultra-thin g-C 3 N 4 -NS;

[0026] (3) The 0.1503g ultra-thin g-C obtained in step (2) 3 N 4 -NS dispersed in 8ml of water 30min after sonication, 3ml of 0.03M AgNO was added to it 3 aqueous solution, and then after magnetic stirring for 30min, slowly add 2ml of 0.03M Na 2 MoO 4 aqueous solution, after magnetic stirring for 1 hour, centrifuge ...

Embodiment 3

[0027] Embodiment 3 A kind of preparation method of silver molybdate / carbon nitride composite visible light catalyst

[0028] (1) Add 5g of melamine to the crucible, cover the crucible, heat up from room temperature to 520°C, calcinate for 2h, cool to room temperature, grind the obtained sample into powder, and obtain the bulk phase g-C 3 N 4 , the heating rate is 2°C / min;

[0029] (2) The bulk phase g-C obtained in step (1) 3 N 4 Put it in a crucible with the top of the crucible open, heat up from room temperature to 520°C, calcinate for 4 hours, cool to room temperature, and grind the obtained sample into powder to obtain the ultra-thin g-C 3 N 4 -NS;

[0030] (3) The 0.0874g ultra-thin g-C obtained in step (2) 3 N 4 -NS dispersed in 8ml of water 30min after sonication, 3ml of 0.03M AgNO was added to it 3 aqueous solution, and then after magnetic stirring for 30min, slowly add 2ml of 0.03M Na 2 MoO 4 aqueous solution, after magnetic stirring for 1 hour, centrifuge ...

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Abstract

The invention relates to a preparation method for a silver molybdate/carbonitride composite visible-light-driven photocatalyst. The composite visible-light-driven photocatalyst is of a binary system,and comprises, by mass percentage, 10 to 30% of silver molybdate, with the balance being g-C3N4. The preparation method comprises the following steps: calcining melamine to prepare ultrathin g-C3N4 nanosheets, then dispersing the g-C3N4 nanosheets in water, adding an aqueous solution of AgNO3, adding an aqueous solution of Na2MoO4 under the condition of magnetic stirring, and performing centrifugal drying so as to obtain the silver molybdate/carbonitride composite visible-light-driven photocatalyst. The prepared silver molybdate/carbonitride composite visible-light-driven photocatalyst has high yield, excellent photocatalysis performance and superior application prospects.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation and application, in particular to a method for preparing a silver molybdate / carbon nitride composite visible light catalyst. Background technique [0002] As a semiconductor material, carbon nitride has a stable structure and can exist stably in strong acid or strong alkali at room temperature. However, g-C 3 N 4 Photogenerated electrons and holes have a very high probability of recombination, and their specific surface area is relatively low. These two reasons affect its photocatalytic performance to a certain extent. To make g-C 3 N 4 The improved catalytic efficiency of a series of semiconductor / g-C 3 N 4 Heterojunction photocatalysts have emerged, such as Ag / AgBr / g-C 3 N 4 、Ag 3 PO 4 / g -C 3 N 4 and Ag 2 CO 3 / g -C 3 N 4 , in order to achieve the purpose of promoting strengths and avoiding weaknesses, and complementing each other's advantages. How to improve g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/34A62D3/17A62D101/26A62D101/28
CPCA62D3/17A62D2101/26A62D2101/28B01J27/24B01J35/004B01J37/082B01J37/343
Inventor 张现峰李宗群吕长鹏章颖刘圆方
Owner BENGBU COLLEGE
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