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Full-visible-spectrum response carbon nitride-based ternary composite photocatalyst and preparation method thereof

A carbon nitride-based, spectrally responsive technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effects of convenient operation, expanded absorption range, and simple preparation process

Active Publication Date: 2020-12-01
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no report on the covalent bonding of polytriazineimine (PTI), graphitic carbon nitride (GCN) and aromatic organic compound (Ph) to form a ternary composite carbon nitride-based photocatalyst.

Method used

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  • Full-visible-spectrum response carbon nitride-based ternary composite photocatalyst and preparation method thereof
  • Full-visible-spectrum response carbon nitride-based ternary composite photocatalyst and preparation method thereof
  • Full-visible-spectrum response carbon nitride-based ternary composite photocatalyst and preparation method thereof

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Embodiment 1

[0032] Embodiment 1: Preparation of PTI / PPD / GCN carbon nitride-based ternary composite photocatalyst

[0033] Disperse 0.1 g of polytriazineimine (PTI) nanosheets in 10 mL of 0.03 mol L -1 Sonicate in the isopropanol solution of p-phenylenediamine (PPD) for 4 h, disperse 5 g of cyanamide in the above mixed solution for 2 h, stir in a constant temperature water bath at 60°C until a white solid is formed, and then Dry under vacuum for 24 h to obtain a white solid powder. Transfer the white solid powder to a container with a lid, raise the temperature to 550°C at a rate of 17°C / min in a muffle furnace, and keep the temperature for 4 hours to prepare a PTI / PPD / GCN carbon nitride-based ternary composite catalyst of light.

[0034] The field emission scanning electron microscope image of the obtained PTI / PPD / GCN ternary heterogeneously combined photocatalyst is shown in figure 1 As shown in the small figure (b), it can be seen from the figure that the PTI / PPD / GCN synthesized in t...

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Abstract

The invention discloses a full-visible-spectrum response carbon nitride-based ternary composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: firstly, dispersing polytriazine imine (PTI) nanosheets into an organic alcohol solvent containing an aromatic organic matter (Ph) and carrying out ultrasonic treatment until the polytriazine imine nanosheets are uniformly dispersed; and adding cyanamide, carrying out heating and stirring in a water bath at 60 DEG C until a white precipitate is generated, carrying out vacuum drying to obtain white solid powder, and carrying out thermal polymerization in an air atmosphere to obtain the carbon nitride-based ternary composite photocatalyst PTI / Ph / GCN. The preparation method disclosed by the invention is simple, and the obtained carbon nitride-based ternary composite photocatalyst has a full-spectrum response characteristic in a visible light range (200-800 nm) and has wide application prospectsin the aspects of energy conversion and environmental governance.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a carbon nitride-based ternary composite photocatalyst with full visible spectrum response and its preparation. Background technique [0002] In recent years, semiconductor photocatalysts have been widely used in solving environmental organic pollution and energy crisis problems due to their "green" characteristics. Among many existing photocatalysts, polymeric semiconductor carbon nitride, as a light non-metallic semiconductor, has become one of the most promising semiconductor materials due to its advantages of suitable energy band structure, good stability and easy preparation. However, carbon nitride materials in the prior art generally only have a relatively narrow visible spectrum absorption range (<560nm), which limits their application in the field of visible light catalysis. [0003] Due to the strong in-plane π-conjugated bond of carbon nitride, the res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/34B01J37/08
CPCB01J27/24B01J37/343B01J37/082B01J35/33B01J35/39
Inventor 孙建华陆杨杨振谭宇烨张慧上官莉牟志刚
Owner JIANGSU UNIV OF TECH