Method for constructing g-C3N4 quantum dot/carbon composite material based on non-covalent bond effect and application thereof

A carbon composite material and non-covalent bond technology, applied in nanotechnology, carbon compounds, chemical instruments and methods for materials and surface science, can solve unsatisfactory catalytic activity, low electron mobility, and small specific surface area and other issues to achieve the effect of low cost, low energy and simple process

Active Publication Date: 2022-02-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic activity of g-C3N4 is still not ideal due to its poor conductivity, small specific surface area, and low electron mobility.

Method used

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  • Method for constructing g-C3N4 quantum dot/carbon composite material based on non-covalent bond effect and application thereof
  • Method for constructing g-C3N4 quantum dot/carbon composite material based on non-covalent bond effect and application thereof
  • Method for constructing g-C3N4 quantum dot/carbon composite material based on non-covalent bond effect and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1, 10 g of melamine is preferably calcined at a high temperature of 550 ° C for 4 h, and the grinding is obtained by G-C. 3 N 4 Powder. Step 2, refer to G-C in step 1 3 N 4 Powder 1200 mg is placed in a centrifuge tube, slowly add liquid nitrogen, and place the centrifugal tube into a Duwar bottle containing liquid nitrogen, plus the foam cover, low temperature pretreatment 60 min. Step 3, remove the G-C after pre-processing in step 2 3 N 4 The powder was added to a solution containing 200 ml of water and 200 ml of isopropanol, and the liquid phase stripped 4 h. Step 4, the mixture of step 3 is removed from the centrifuge of 12000 rpm to a centrifuge of 12000 rpm, and the centrifugal upper layer is collected, and the dialysis pocket of the centrifuge is 200, and the dialysis bag of 200 is 3 days to remove the solvent, and the dialysis liquid is frozen. Get GC 3 N 4 Quantum dots. Step 5, weigh the G-C in step 4 3 N 4 Quantum dots 2 mg and carboxylated multi-walled carbo...

Embodiment 2

[0027] Step 1, 10 g of melamine is preferably calcined at a high temperature of 550 ° C for 4 h, and the grinding is obtained by G-C. 3 N 4 Powder. Step 2, refer to G-C in step 1 3 N 4 Powder 1200 mg is placed in a centrifuge tube, slowly add liquid nitrogen, and place the centrifugal tube into a Duwar bottle containing liquid nitrogen, plus the foam cover, low temperature pretreatment 60 min. Step 3, remove the G-C after pre-processing in step 2 3 N 4 The powder was added to a solution containing 200 ml of water and 200 ml of isopropanol, and the liquid phase stripped 4 h. Step 4, the mixture of step 3 is removed from the centrifuge of 12000 rpm to a centrifuge of 12000 rpm, and the centrifugal upper layer is collected, and the dialysis pocket of the centrifuge is 200, and the dialysis bag of 200 is 3 days to remove the solvent, and the dialysis liquid is frozen. Get GC 3 N 4 Quantum dots. Step 5, weigh the G-C in step 4 3 N 4 Quantum dots 2 mg and carboxylated multi-walled carbo...

Embodiment 3

[0029] Step 1, 6G urea is calcined at a nitrogen atmosphere of 500 ° C for 3 h, and the grinding is obtained to obtain G-C. 3 N 4 Powder. Step 2, refer to G-C in step 1 3 N 4 Powder 1600 mg is placed in a centrifuge tube, slowly add liquid nitrogen to the tube into a Duwar bottle containing liquid nitrogen, plus the foam cover, low temperature pretreatment for 30 min. Step 3, remove the G-C after pre-processing in step 2 3 N 4 The powder was added to a solution of 800 ml of acetone, and the liquid phase stripped 3 h. Step 4, the mixture of step 3 is removed from the centrifuge of the rotational speed of 11000 rpm, and the centrifugal upper layer is collected, and the dialysis bag of the centrifugation is collected by dialysis bags of 2002 to remove the solvent, and the dialysis liquid is frozen. Get GC 3 N 4 Quantum dots. Step 5, weigh the G-C in step 4 3 N 4 Quantum dots 3 mg and carboxylated single-walled carbon nanotubes were added to 100 mg of distilled water, and the magnetic...

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Abstract

The invention belongs to the technical field of carbon material preparation, and relates to a method for constructing a g-C3N4 quantum dot / carbon composite material based on a non-covalent bond effect and application thereof, and the construction method comprises the following steps: preparing g-C3N4 by using a high-temperature thermal polymerization method and using a nitrogen-rich material as a precursor; preparing g-C3N4 quantum dots from the g-C3N4 by using a low-temperature pretreatment combined with a liquid phase stripping process; combining mechanical stirring with the high-speed centrifugation technology so that g-C3N4 quantum dots with nitrogen-containing active groups and the carbon material with good conductivity are subjected to non-covalent bond pi-pi stacking interaction to obtain the g-C3N4 quantum dot / carbon composite material. The method has the characteristics of simple preparation process, mild conditions, low energy consumption, high efficiency, low cost and the like. Compared with a commercially available Pt electrode, the constructed g-C3N4 quantum dot / carbon composite material shows higher I3 <-> catalytic activity, and is a material with a wide application prospect in dye-sensitized solar cells.

Description

Technical field [0001] The present invention relates to a non-covalent bond-based construction G-C 3 N 4 Methods of quantum dots / carbon composite materials and their applications, belonging to the technical field of carbon material preparation. Background technique [0002] Dye-sensitized solar cells (DSSCs) are widely concerned by researchers as a new type of solar cell. The DSSCS is mainly composed of three parts: the electrolytic solution of the electrode, the electrode and the oxidative reduction electrode, wherein the electrode is one of the important components of DSSCS, mainly to collect external circuit electronics and catalytic I. 3 - The role of restoration. The traditional pair of electrode materials is mainly precious metal PT, but PT has limited reserves, high cost, greatly limiting the large-scale application of DSSCS. Therefore, the development of low-cost and excellent catalytic performance has always been a hot spot for research. Studies have shown that carbon...

Claims

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Application Information

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IPC IPC(8): C01B32/168C01B32/159C01B32/15C01B32/194C01B21/082H01G9/20B82Y40/00B82Y30/00
CPCC01B32/168C01B32/159C01B32/15C01B32/194C01B21/0605H01G9/20B82Y40/00B82Y30/00C01P2004/80C01B2202/06C01P2004/51C01P2004/04C01P2002/85C01P2004/64Y02E10/542
Inventor 邱介山侯思懿于畅常江伟丁一旺
Owner DALIAN UNIV OF TECH
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