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Carboxyl-containing perylene bisimide/oxygen-doped carbon nitride nanosheet heterojunction photocatalyst as well as preparation method and application thereof

A perylene imide and photocatalyst technology, applied in the field of photocatalytic materials, can solve the problems of high recombination probability of photogenerated electron-hole pairs, affect the application prospect of photocatalysis, and the catalytic activity is easily affected by pH, so as to achieve rapid transfer Expansion, excellent degradation of pollutants, and improvement of migration ability

Active Publication Date: 2020-07-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, PDI with unmodified hydrophilic groups at the end has poor dispersion in water, its catalytic activity is easily affected by pH, the recombination probability of photogenerated electron-hole pairs is high, and its photoreduction ability is weak, which affects its application in the field of photocatalysis. Application prospects

Method used

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  • Carboxyl-containing perylene bisimide/oxygen-doped carbon nitride nanosheet heterojunction photocatalyst as well as preparation method and application thereof
  • Carboxyl-containing perylene bisimide/oxygen-doped carbon nitride nanosheet heterojunction photocatalyst as well as preparation method and application thereof
  • Carboxyl-containing perylene bisimide/oxygen-doped carbon nitride nanosheet heterojunction photocatalyst as well as preparation method and application thereof

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Effect test

Embodiment 1

[0039] A carboxyl peryleneimide / oxygen-doped carbon nitride nanosheet heterojunction photocatalyst, the preparation method of the photocatalyst comprises the following steps:

[0040] First, put 3-amino-1,2,4-triazole in a crucible, put it into a muffle furnace, heat up to 550°C at a rate of 2°C / min and calcinate for 4 hours, and grind the product to obtain a brick-red block carbon nitride; grind block carbon nitride, place it in a crucible, put it into a muffle furnace, heat up to 500 °C at a rate of 5 °C / min for secondary calcination for 2 hours, and grind the product to obtain carbon nitride nano sheet; disperse 0.9g carbon nitride nanosheets in 100mL 30vol% H 2 o 2 Ultrasonic (560W, 40kHz) in aqueous solution for 30 minutes, then transfer the dispersion to a hydrothermal kettle, heat at 120°C for 6 hours, collect the precipitate by centrifugation, wash the precipitate with water several times, dry it and grind it into powder to obtain a bright yellow powder The product i...

Embodiment 2

[0042] A carboxyl peryleneimide / oxygen-doped carbon nitride nanosheet heterojunction photocatalyst, the preparation method of the photocatalyst comprises the following steps:

[0043] First, put 3-amino-1,2,4-triazole in a crucible, put it into a muffle furnace, heat up to 450°C at a rate of 1°C / min and calcinate for 1 hour, and grind the product to obtain a brick-red block carbon nitride; grind block carbon nitride, place it in a crucible, put it into a muffle furnace, heat up to 450 °C at a rate of 1 °C / min for secondary calcination for 1 h, and grind the product to obtain carbon nitride nano sheet; disperse 1g carbon nitride nanosheets in 30mL 0.1vol% H 2 o 2 Ultrasonic (200W, 10kHz) in aqueous solution for 5 minutes, then transfer the dispersion to a hydrothermal kettle, heat at 80°C for 2 hours, collect the precipitate by centrifugation, wash the precipitate with water several times, dry it and grind it into powder to obtain a bright yellow powder The product is oxygen-...

Embodiment 3

[0045] A kind of heterojunction photocatalyst containing carboxyl peryleneimide / oxygen-doped carbon nitride nanosheet, the preparation method of said photocatalyst comprises the following steps:

[0046] First, put 3-amino-1,2,4-triazole in a crucible, put it into a muffle furnace, heat up to 600°C for 8 hours at a rate of 12°C / min, and grind the product to obtain a brick-red block carbon nitride; grind block carbon nitride, place it in a crucible, put it into a muffle furnace, heat up to 600 °C at a rate of 12 °C / min for secondary calcination for 8 hours, and grind the product to obtain carbon nitride nano sheet; disperse 1g carbon nitride nanosheets in 150mL 40vol% H 2 o 2 Ultrasonic (800W, 50kHz) in aqueous solution for 60min, then transfer the dispersion to a hydrothermal kettle, heat at 150°C for 10h, collect the precipitate by centrifugation, wash the precipitate with water several times, dry it and grind it into powder to obtain a bright yellow powder The product is o...

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Abstract

The invention discloses a carboxyl-containing perylene bisimide / oxygen-doped carbon nitride nanosheet heterojunction photocatalyst as well as a preparation method and application thereof. The photocatalyst is formed by compounding carboxyl-containing perylene bisimide and an oxygen-doped carbon nitride nanosheet through electrostatic interaction and pi-pi interaction, wherein the mass ratio of theoxygen-doped carbon nitride nanosheet to the carboxyl-containing perylene bisimide ranges from 1: 0.001 to 1: 0.8. The carboxyl perylene bisimide is modified on the oxygen-doped carbon nitride nanosheet through an in-situ method. Compared with the prior art, the photocatalyst disclosed by the invention has the following advantages: (1) compared with O-CN and PDI in the prior art, the photocatalyst disclosed by the invention has more excellent performances of photocatalytically degrading pollutants, killing pathogenic bacteria and photolyzing water to produce oxygen; and (2) the raw materialsare cheap, the process is simple, the product cost is effectively reduced, and the method is suitable for industrial mass production and has very high application prospect and practical value.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to a heterojunction photocatalyst, specifically a carboxyl-containing peryleneimide / oxygen-doped carbon nitride nanosheet heterojunction photocatalyst and a preparation method and application thereof. Background technique [0002] Carbon nitride is a non-metal n-type organic semiconductor visible light photocatalyst, which has the advantages of simple preparation, low cost, good stability, non-toxicity, and easy regulation, so it is widely used in the degradation of pollutants and antibacterial. However, the carbon nitride prepared by the traditional polycondensation method has large particle size, low utilization rate of visible light, and low quantum efficiency, resulting in unsatisfactory photocatalytic activity. Therefore, it is of great importance to develop carbon nitride-based photocatalysts with nanostructure morphology, wide visible spectral response range, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J31/06B01J35/06A01N43/90A01N59/16A01P3/00A01P1/00C02F1/30C01B13/02A62D3/17A62D101/28
CPCB01J31/069B01J31/0271B01J31/0254B01J31/0244A01N43/90A01N59/16C02F1/30C01B13/0207A62D3/17C02F2101/345C02F2305/10A62D2101/28B01J35/58B01J35/39
Inventor 徐婧王周平高遒竹
Owner JIANGNAN UNIV
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