Graphite phase carbon nitride and preparation method thereof, and hydrogen production photocatalyst and applications thereof

A graphitic carbon nitride and photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, nitrogen compounds, etc., can solve problems such as limiting the efficiency of photocatalytic hydrogen production, and achieve good visible light response and good visible light catalysis Hydrogen production activity and the effect of enriching photocatalytic hydrogen production active sites

Active Publication Date: 2019-08-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the extremely high recombination rate of photogenerated electrons and holes in graphitic carbon nitride itself limits the improvement of its photocatalytic hydrogen production efficiency. Therefore, in order to promote the industrial application of graphitic carbon nitride, the development of graphitic carbon nitride Modification and preparation of new graphitic phase carbon nitrides are considered as important means to improve their photocatalytic hydrogen production efficiency

Method used

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  • Graphite phase carbon nitride and preparation method thereof, and hydrogen production photocatalyst and applications thereof
  • Graphite phase carbon nitride and preparation method thereof, and hydrogen production photocatalyst and applications thereof
  • Graphite phase carbon nitride and preparation method thereof, and hydrogen production photocatalyst and applications thereof

Examples

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Effect test

Embodiment example 1

[0032] Step 1: Weigh 1.0g of biuret, place it in a small crucible, put the small crucible in a tube furnace, and pass argon into the tube furnace for half an hour to drive away the air in the furnace. Then set the program to raise the temperature to 520°C at 5°C / min and hold it for 4h, and finally cool naturally to obtain a new type of graphite phase carbon nitride, which is named BCN-520.

[0033] Step 2: Add the graphite-phase carbon nitride powder prepared in step 1 into the reaction system for photocatalytic water splitting to produce hydrogen, and load platinum (loaded with 3wt% platinum) by photoreduction method to conduct photocatalytic water splitting hydrogen production test. Specific steps are as follows:

[0034] 1) Add 10.0 mg of graphitic carbon nitride into a reactor with a volume of 100 mL, and add a total volume of 80 mL of an aqueous solution with a triethanolamine content of 10 vol% as a sacrificial agent; and add 0.425 mL of platinum with a content of 0.0007...

Embodiment example 2

[0039] Step 1: Weigh 1.0g of biuret, place it in a small crucible, put the small crucible in a tube furnace, and pass argon into the tube furnace for half an hour to drive away the air in the furnace. Then set the program to raise the temperature to 550°C at 5°C / min and hold it for 4h, and finally cool naturally to obtain a new type of graphite phase carbon nitride, which is named BCN-550.

[0040] Step 2: Add the graphite-phase carbon nitride powder prepared in step 1 into the reaction system for photocatalytic water splitting to produce hydrogen, and load platinum (loaded with 3wt% platinum) by photoreduction method to conduct photocatalytic water splitting hydrogen production test. Specific steps are as follows:

[0041] 1) Add 10.0 mg of graphitic carbon nitride into a reactor with a volume of 100 mL, and add a total volume of 80 mL of an aqueous solution with a triethanolamine content of 10 vol% as a sacrificial agent; and add 0.425 mL of platinum with a content of 0.0007...

Embodiment example 3

[0046]Step 1: Weigh 1.0g of biuret, place it in a small crucible, put the small crucible in a tube furnace, and pass argon into the tube furnace for half an hour to drive away the air in the furnace. Then set the program to raise the temperature to 600°C at 5°C / min and hold it for 4h, and finally cool naturally to obtain the prepared new graphite phase carbon nitride, which is named BCN-600.

[0047] Step 2: Add the graphite-phase carbon nitride powder prepared in step 1 into the reaction system for photocatalytic water splitting to produce hydrogen, and load platinum (loaded with 3wt% platinum) by photoreduction method to conduct photocatalytic water splitting hydrogen production test. Specific steps are as follows:

[0048] 1) Add 10.0 mg of graphitic carbon nitride into a reactor with a volume of 100 mL, and add a total volume of 80 mL of an aqueous solution with a triethanolamine content of 10 vol% as a sacrificial agent; and add 0.425 mL of platinum with a content of 0.00...

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Abstract

The invention discloses a graphite phase carbon nitride photocatalyst prepared by using biuret as a precursor material, wherein biuret is directly calcined for 2-4 h at a temperature of more than 500-600 DEGC in an argon atmosphere or a nitrogen atmosphere to obtain the novel graphite phase carbon nitride. According to the present invention, the graphite phase carbon nitride is successfully prepared by firstly using the material biuret, and has advantages of strong light absorption capability, good visible light response, large specific surface area and rich light catalytic hydrogen productionactive sites; after light reduced platinum loading, the graphite phase carbon nitride prepared from biuret has good visible light catalytic hydrogen production activity compared with the graphite phase carbon nitride prepared from other precursor materials, wherein the visible light catalytic hydrogen production rate reaches 7026 [mu]mol/h/gcat, the quantum efficiency at 425 nm is 10.8%, and thehydrogen production stability is good; and the method has characteristics of simple operation and good repeatability, and provides a reliable scheme in the improvement of photocatalytic decompositionwater-to-hydrogen efficiency and the development and applications of graphite phase carbon nitride.

Description

technical field [0001] The invention belongs to the field of hydrogen energy preparation, and in particular relates to a graphitic carbon nitride and a preparation method thereof, a hydrogen-producing photocatalyst and an application thereof. Background technique [0002] The rapid development of science, technology and industrialization in today's society has made the demand for energy more and more large. However, the reserves of conventional energy are less and less and the supply is insufficient. The environmental pollution caused by the development and utilization of fossil energy is also becoming more and more serious. . In order to solve the two major problems of energy shortage and environmental pollution that threaten human survival and development, it has always been people's pursuit to find clean and non-polluting renewable energy that can replace conventional energy. The basic theoretical research on the conversion and utilization of renewable energy, and the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082C01B3/04B01J27/24
CPCB01J27/24B01J35/004C01B3/042C01B21/0605C01B2203/0277C01B2203/1064C01B2203/107C01B2203/1082Y02E60/36
Inventor 师进文程诚毛柳浩郭烈锦
Owner XI AN JIAOTONG UNIV
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