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Hollow fusiform carbon nitride micrometer structure and preparation method and application thereof

A carbon nitride-like, micron-structured technology, applied in the field of semiconductor materials and their preparation, can solve problems such as increasing production costs, increasing the difficulty of reactions, and reaction processes, achieving low prices, improving photocatalytic properties, and promoting separation and transfer effect

Active Publication Date: 2020-02-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under the action of the template, although the morphology is controlled, it is followed by the extreme conditions required for template removal, which increases the difficulty of the reaction and the reaction process, and increases the production cost.

Method used

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  • Hollow fusiform carbon nitride micrometer structure and preparation method and application thereof
  • Hollow fusiform carbon nitride micrometer structure and preparation method and application thereof
  • Hollow fusiform carbon nitride micrometer structure and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0046] 1.1 Disperse 0.5 g of melamine in 60 ml of deionized water, stir and disperse evenly, transfer the suspension to a reaction kettle, and conduct a hydrothermal reaction at 200°C for 10 hours.

[0047] 1.2. After the reaction is over, cool down the reaction kettle to 80°C naturally, then cool down the reaction kettle with flowing tap water for 5 minutes, and open the kettle quickly after the skin of the kettle cools down.

[0048] 1.3. The transparent and colorless solution obtained in step 1.2 was quickly transferred to a beaker and stirred vigorously until it dropped to room temperature and a white precipitate was obtained.

[0049] 1.4. The product obtained in step 1.3 was centrifuged and washed several times with deionized water and freeze-dried.

[0050] 1.5. Under the protection of argon gas, the precursor obtained in the above step 1.4 was heated to 650 °C at a heating rate of 5 °C / min, kept for 2 h, and then cooled naturally with the furnace to obtain the final pr...

Embodiment 2

[0053] Hollow shuttle-shaped carbon nitride was prepared according to the method of Example 1, except that melamine was replaced by dicyandiamide. The obtained carbon nitride morphology and Figure 8 Similarly, it is a hollow spindle shape, about 5-11 μm in length, and the maximum diameter of the central protrusion is 2-5 μm.

Embodiment 3

[0055] Hollow shuttle-shaped carbon nitride was prepared according to the method of Example 1, except that melamine was replaced by carbon nitride. The resulting final carbon nitride morphology is still a hollow spindle shape, about 6-12 μm in length, and the maximum diameter of the central protrusion is 3-6 μm.

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Abstract

The invention discloses a hollow fusiform carbon nitride micrometer structure and a preparation method and application thereof. The preparation method comprises the preparation steps: nitrogen-containing organic precursors are dispersed in water and subjected to hydrothermal pretreatment at 180-210 DEG C; after the temperature is decreased to be 60-120 DEG C, a reaction still is opened, transparent reaction liquid is transferred into other containers to be stirred, and white precursors are precipitated; and the white precursors are calcinated under gas protection, and the hollow fusiform carbon nitride micrometer structure is obtained. Through a method for controlling a precipitation mode of the precursors, the growth kinetics process of the precursors is changed, and a hollow fusiform carbon nitride material is synthesized for the first time; and hollow fusiform carbon nitride synthesized through the method is uniform in morphology, and the visible-light response area of the hollow fusiform carbon nitride is expanded, in the aspect of visible-light photocatalytic hydrogen production, the hydrogen production property of the hollow fusiform carbon nitride is qualitatively improved compared with pure flaky carbon nitride, and the hollow fusiform carbon nitride micrometer structure has important application in the fields of photocatalysis and the like.

Description

technical field [0001] The present invention relates to a carbon nitride with a special microscopic appearance, in particular to a hollow shuttle-shaped carbon nitride microstructure and a preparation method thereof, and also relates to the use of the hollow shuttle-shaped carbon nitride microstructure as a visible light photocatalytic hydrogen production catalyst The application of the invention belongs to the technical field of semiconductor materials and their preparation. Background technique [0002] Carbon nitride is an organic semiconductor composed of oxazine ring units. Due to its band gap of about 2.7eV, it is a photocatalyst that responds to visible light. The field of catalytic hydrogen production shows extremely excellent properties. [0003] However, under normal conditions, the carbon nitride materials obtained by high-temperature thermal condensation polymerization using carbon-nitrogen-containing precursors such as melamine and dicyandiamide as raw material...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02C01B3/04C01B21/06
CPCB01J27/24C01B3/042C01B21/0605C01B2203/0277C01P2004/03C01P2002/72C01P2004/61B01J35/40B01J35/39Y02E60/36
Inventor 杨萍江志翔
Owner UNIV OF JINAN
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