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Preparation method of bismuth-doped polymerized carbon nitride nano composite material containing carbon defects

A technology of nanocomposite materials and carbon nitride, which is applied to the analysis of materials, electrochemical variables of materials, and material analysis through electromagnetic means, and can solve problems such as harsh experimental conditions, imperfect technical solutions, and narrow light absorption range of a single PCN , to achieve improved photoelectric properties, high PEC stability and photoactivity, and enhanced visible light absorption

Active Publication Date: 2020-04-21
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a simple and mild preparation method for the synthesis of bismuth-doped polymeric carbon nitride (Bi / CV-PCN) nanocomposites containing carbon defects, which effectively solves the problem of the narrow light absorption range of single PCN; when CVs are introduced Problems such as harsh experimental conditions and imperfect existing technical solutions

Method used

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  • Preparation method of bismuth-doped polymerized carbon nitride nano composite material containing carbon defects
  • Preparation method of bismuth-doped polymerized carbon nitride nano composite material containing carbon defects
  • Preparation method of bismuth-doped polymerized carbon nitride nano composite material containing carbon defects

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Embodiment 1

[0041] Preparation of Bismuth-doped Polymerized Carbon Nitride Nanocomposites Containing Carbon Defects

[0042] (1) Preparation of ultrathin PCN nanosheets

[0043] First, 2 g of melamine and 0.2 g of TAP were mixed in 60 mL of ethanol, the mixture was stirred and then heated at 100 °C until the ethanol evaporated to obtain a solid product. Afterwards, use 5 g of molten salt (including NaCl and KCl, wherein the molar ratio of NaCl and KCl is 76:24) as a solvent and template to accelerate the polymerization process, grind with a mortar and mortar to form a homogeneous mixture with the obtained solid product, and put it into the lid In a porcelain crucible, it was heated at 550°C for 4h at a heating rate of 12°C / min, and the final product was marked as PCN.

[0044] For comparison, g-C was synthesized according to the melamine polymerization method reported in the literature 3 N 4 .

[0045] (2) Preparation of bismuth-doped polymeric carbon nitride nanocomposites containing...

Embodiment 2

[0064] Preparation of Bismuth-doped Polymerized Carbon Nitride Nanocomposites Containing Carbon Defects

[0065] (1) Preparation of ultrathin PCN nanosheets

[0066] First, 1 g of melamine and 0.1 g of TAP were mixed in 50 mL of ethanol, the mixture was stirred and then heated at 100 °C until the ethanol evaporated to obtain a solid product. Afterwards, use 4 g of molten salt (including NaCl and KCl, wherein the molar ratio of NaCl and KCl is 76:24) as a solvent and a template to accelerate the polymerization process, grind with a mortar together with the obtained solid product to form a homogeneous mixture, put into the lid In a porcelain crucible, it was heated at 550 °C for 3 h at a heating rate of 12 °C / min, and the final product was marked as PCN.

[0067] (2) Preparation of bismuth-doped polymeric carbon nitride nanocomposites containing carbon defects

[0068] First, 0.145g Bi(NO 3 ) 3 ·5H 2 O dissolved in 9mL with a concentration of 1mol L -1 HNO 3middle. Then,...

Embodiment 3

[0070] Preparation of Bismuth-doped Polymerized Carbon Nitride Nanocomposites Containing Carbon Defects

[0071] (1) Preparation of ultrathin PCN nanosheets

[0072] First, 3 g of melamine and 0.3 g of TAP were mixed in 70 mL of ethanol, the mixture was stirred and then heated at 100 °C until the ethanol evaporated to obtain a solid product. Afterwards, use 6g of molten salt (including NaCl and KCl, wherein the molar ratio of NaCl and KCl is 76:24) as a solvent and a template to accelerate the polymerization process, grind with a mortar to form a homogeneous mixture with the obtained solid product, and put it into the lid In a porcelain crucible, it was heated at 550°C for 5h at a heating rate of 12°C / min, and the final product was marked as PCN.

[0073] (2) Preparation of bismuth-doped polymeric carbon nitride nanocomposites containing carbon defects

[0074] First, 0.218g Bi(NO 3 ) 3 ·5H 2 O dissolved in 11mL with a concentration of 1mol L -1 HNO 3 middle. Then, 60 ...

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Abstract

The invention, which belongs to the technical field of functional nano materials, provides a preparation method of a bismuth-doped polymerized carbon nitride nano composite material containing carbondefects. The method comprises the following steps: step 1, preparing ultrathin PCN nanosheets; and step 2, preparing a bismuth-doped polymerized carbon nitride (Bi / CV-PCN) nano composite material containing carbon defects. According to the preparation method, 2, 4, 6-triaminopyrimidine is introduced into a CN structure through supramolecular aggregation and ion melt polycondensation to obtain theultrathin PCN nanosheet, the crystallinity of PCN is controlled, and visible light absorption is enhanced. Then, a Bi / CV-PCN nano composite material is synthesized by utilizing a mild and simple one-pot hydrothermal method. Under the synergistic effect of an SPR effect caused by Bi doping and CVs, the photoactivity and the photoelectrochemical stability of the composite material are further improved, and charge separation is accelerated.

Description

technical field [0001] The invention belongs to the technical field of functional nanometer materials, and in particular relates to a preparation method of a bismuth-doped polymeric carbon nitride nanocomposite material containing carbon defects. Background technique [0002] Recently, polymeric carbon nitride (PCN) has attracted much attention from the scientific community as a promising photosensitive material. Various PCN materials can be obtained by different synthesis methods, such as melon (commonly known as g-C 3 N 4 ), polytriazineimide (PTI), polyhexapazineimide, and triazine-based graphitic carbon nitride. PCN materials have been applied in different fields, including photocatalysis, electrocatalysis, pollutant degradation, water splitting, solar cells, and sensors, due to their metal-free, chemically stable, excellent optical / electronic properties, and suitable energy band structures. However, a single PCN has problems such as limited light absorption, small su...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/32G01N27/327
CPCG01N27/305G01N27/308G01N27/3278G01N27/301G01N27/32G01N27/30
Inventor 王坤徐宇环魏婕
Owner JIANGSU UNIV
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