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Preparation method and application of 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: 2018-05-04
FUZHOU UNIVERSITY
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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 carbon nitride/bismuth selenate composite material
  • Preparation method and application of carbon nitride/bismuth selenate composite material
  • Preparation method and application of carbon nitride/bismuth selenate composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

Embodiment 2

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

[0026] (2) 2 g of urea powder was added to water, heated to 100 °C to dissolve, and 10 g of Bi was added under the action of ultrasound. 2 SeO 5 The powder was stirred for 6 h, cooled to room temperature, centrifuged, and dried in an oven at 80 °C. The dried samples were fully ground and placed in a tube furnace. 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 denoted as C / B-20 wt%.

Embodiment 3

[0028] (1) Mix 2 mmol of bismuth carbonate and 3 mmol of selenium powder uniformly, put them in a muffle furnace, and calcine them 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 °C / min), the obtained solid sample is Bi 2 SeO 5 ;

[0029] (2) 3 g of urea powder was added to water, heated to 100 °C to dissolve, and 10 g of Bi was added under the action of ultrasound. 2 SeO 5 The powder was stirred for 6 h, cooled to room temperature, centrifuged, and dried in an oven at 80 °C. The dried samples were fully ground and placed in a tube furnace. Mixed with hydrogen and nitrogen with a hydrogen content of 0.5v / v% g-C can be obtained by calcining at 400 °C for 2 h (heating rate 5 °C / min) in air. 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 a carbon nitride / bismuth selenate composite material and belongs to the technical field of material preparation and photocatalysis. Thepreparation method disclosed by the invention comprises the following steps: adding a certain amount of urea powder into water, heating to a temperature of 100 DEG C to be dissolved, adding Bi2SeO5 powder under an ultrasonic action, stirring for 6 hours, cooling to room temperature, centrifuging and drying in a drying oven at a temperature of 80 DEG C, fully grinding the dried sample, and calcining in a tube furnace in a reducing atmosphere, thereby obtaining the g-C3N4 / Bi2SeO5 complex. The preparation process is very simple, and organic surfactants or template agents and the like do not needto be added. Meanwhile, the equipment requirement in the synthetic process is low, and no other expensive synthesis equipment or high-temperature high-pressure reaction device is needed, which facilitates large-scale popularization. The composite photocatalyst is applied to visible-light selective organic synthesis.

Description

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

Claims

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Application Information

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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 UNIVERSITY
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