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Preparation method and application of a carbon nitride/bismuth selenate composite material

A composite material, bismuth selenate technology, applied in catalyst activation/preparation, chemical instruments and methods, oxidation preparation of carbonyl compounds, etc., can solve the problem of no research report on nano-composite photocatalysts, etc. Simple process effect

Active Publication Date: 2020-03-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However preparation C 3 N 4 and Bi 2 SeO 5 The study of nanocomposite photocatalysts has not been reported yet

Method used

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  • Preparation method and application of a carbon nitride/bismuth selenate composite material
  • Preparation method and application of a carbon nitride/bismuth selenate composite material
  • Preparation method and application of a carbon nitride/bismuth selenate composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Mix 2 mmol of bismuth carbonate and 3 mmol of selenium powder evenly, place them in a muffle furnace, and calcinate at 500 °C for 3 h in a hydrogen-nitrogen mixed atmosphere with a hydrogen content of 20 v / v% (the heating rate is 5 ℃ / min), the obtained solid sample is Bi 2 SeO 5 ;

[0023] (2) Add 0.5 g of urea powder into water, heat to 100 ℃ to dissolve, then add 10 g of Bi under the action of ultrasound 2 SeO 5 powder, stirred for 6 hours, cooled to room temperature, centrifuged and dried in an oven at 80 °C, the dried sample was fully ground and placed in a tube furnace, mixed with hydrogen and nitrogen with a hydrogen content of 0.5v / v% In air, calcined at 350 °C for 2 h (heating rate 1 °C / min), you can get g-C 3 N 4 / Bi 2 SeO 5 Composite; the resulting sample is denoted as C / B-5 wt%.

Embodiment 2

[0025] (1) Mix 2 mmol of bismuth carbonate and 3 mmol of selenium powder evenly, place them in a muffle furnace, and calcinate at 500 °C for 3 h in a hydrogen-nitrogen mixed atmosphere with a hydrogen content of 0.5 v / v% (heating rate is 5 ℃ / min), the obtained solid sample is Bi 2 SeO 5 ;

[0026] (2) Add 2 g of urea powder into water, heat to 100 °C to dissolve, then add 10 g of Bi 2 SeO 5 powder, stirred for 6 hours, cooled to room temperature, centrifuged and dried in an oven at 80 °C, the dried sample was fully ground and placed in a tube furnace, in a hydrogen-nitrogen mixture with a hydrogen content of 20v / v% , calcined at 500 °C for 2 h (heating rate 3 °C / min), to obtain g-C 3 N 4 / Bi 2 SeO 5 Composite; the resulting sample is noted as C / B-20 wt%.

Embodiment 3

[0028] (1) Mix 2 mmol of bismuth carbonate and 3 mmol of selenium powder evenly, place them in a muffle furnace, and calcinate at 500 °C for 3 h in a hydrogen-nitrogen mixed atmosphere with a hydrogen content of 10 v / v% (the heating rate is 10 ℃ / min), the obtained solid sample is Bi 2 SeO 5 ;

[0029] (2) Add 3 g of urea powder into water, heat to 100 °C to dissolve, then add 10 g of Bi 2 SeO 5 powder, stirred for 6 hours, cooled to room temperature, centrifuged and dried in an oven at 80 °C, the dried sample was fully ground and placed in a tube furnace, mixed with hydrogen and nitrogen with a hydrogen content of 0.5v / v% In air, calcined at 400 °C for 2 h (heating rate 5 °C / min), you can get g-C 3 N 4 / Bi 2 SeO 5 Composite; the resulting sample is denoted as C / B-30 wt%.

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Abstract

The invention discloses a preparation method and application of carbon nitride / bismuth selenate composite material, and belongs to the technical fields of material preparation and photocatalysis. The preparation method of the present invention is as follows: adding a certain amount of urea powder into water, heating it to 100°C to dissolve, and then adding Bi under the action of ultrasound. 2 O 5 After stirring for 6 hours, the powder is cooled to room temperature, centrifuged and dried in an oven at 80°C. The dried sample is fully ground and then calcined in a tube furnace under a reducing atmosphere to obtain g‑C 3 N 4 / Bi 2 O 5 Complex. The preparation process is very simple and does not require the addition of organic surfactants, template agents, etc.; at the same time, the equipment requirements during the synthesis process are low, and no other expensive synthesis equipment or reaction devices such as high temperature and high pressure are required, which is conducive to large-scale promotion. This composite photocatalyst is used in visible light selective organic synthesis.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic composite material preparation, and in particular relates to a preparation method and application of a carbon nitride / bismuth selenate composite material. Background technique [0002] Semiconductor photocatalysis technology has attracted extensive attention from scholars because of its mild reaction conditions, no secondary pollution, low cost, and obvious potential in the fields of sewage treatment and photolysis of water to produce hydrogen. Traditional TiO 2 The utilization rate of sunlight by photocatalysts is low (only limited to ultraviolet light, accounting for about 4% of sunlight), which seriously restricts the development of photocatalytic technology. In order to effectively utilize solar energy, the development and design of highly efficient photocatalysts that respond to visible light is becoming a current research hotspot. [0003] Among many semiconductor photocatalysts, Bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/18C07C45/29C07C47/54
CPCC07C45/29B01J27/24B01J37/082B01J37/18B01J35/39C07C47/54
Inventor 祝淑颖梁诗景
Owner FUZHOU UNIV
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