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Heterogeneous core-shell g-C3N5@MnO2 complex and preparation method thereof

A technology of g-c3n5, complex, applied in chemical instruments and methods, chemical/physical process, physical/chemical process catalyst, etc., can solve the problems of high cost, complex synthesis process, long time-consuming, etc., and achieve low cost , excellent photocatalytic performance, simple operation effect

Active Publication Date: 2021-01-15
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on MnO 2 The synthesis process of the complex is complex, time-consuming, and costly, and it is also necessary to add an additional reducing agent (carbon) obtained during the carbonization of organic matter into the synthesis system

Method used

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  • Heterogeneous core-shell g-C3N5@MnO2 complex and preparation method thereof
  • Heterogeneous core-shell g-C3N5@MnO2 complex and preparation method thereof
  • Heterogeneous core-shell g-C3N5@MnO2 complex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A heterogeneous core-shell g-C 3 N 5 @MnO 2 Complex, in stick form g-C 3 N 5 For the kernel, in rod g-C 3 N 5 The surface is compounded with MnO 2 Nano sheet, its preparation method, comprises the steps:

[0049] (1) Preparation of rod-shaped g-C 3 N 5 , specifically obtained by the following preparation method: 3-amino-1,2,4-triazole (1.5g) was added to KBr solution (10.0g KBr in 30mL H 2 O), after the solution is mixed evenly, it is heated at 80°C to evaporate the water to dryness to obtain a solid mixture of 3-amino-1,2,4-triazole and KBr, and at the same time, the solid mixture is dried to obtain a dry powder; then the dry powder was calcined at a temperature of 500°C for 3h in an air atmosphere (the heating rate was 5-10°C·min -1 ), after cooling, a tan product was obtained; after the tan product was washed with water, suction filtered, and dried, a rod-shaped g-C 3 N 5 ; Meanwhile, rod-shaped g-C was prepared by using the above 3 N 5 The method of us...

Embodiment 2

[0060] A heterogeneous core-shell g-C 3 N 5 @MnO 2 Complex, in stick form g-C 3 N 5 For the kernel, in rod g-C 3 N 5 The surface is compounded with MnO 2 Nano sheet, its preparation method, comprises the steps:

[0061] (1) Preparation of rod-shaped g-C 3 N 5 , specifically obtained by the following preparation method: 3-amino-1,2,4-triazole (1.5g) was added to KBr solution (10.0g KBr in 30mL H 2 O), after the solution is mixed evenly, it is heated at 80°C to evaporate the water to dryness to obtain a solid mixture of 3-amino-1,2,4-triazole and KBr, and at the same time, the solid mixture is dried to obtain a dry powder; then the dry powder was calcined at a temperature of 500°C for 3h in an air atmosphere (the heating rate was 5-10°C·min -1 ), after cooling, a tan product was obtained; after the tan product was washed with water, suction filtered, and dried, a rod-shaped g-C 3 N 5 ; Meanwhile, rod-shaped g-C was prepared by using the above 3 N 5 The method of us...

Embodiment 3

[0067] A heterogeneous core-shell g-C 3 N 5 @MnO 2 Complex, in stick form g-C 3 N 5 For the kernel, in rod g-C 3 N 5 The surface is compounded with MnO 2 Nano sheet, its preparation method, comprises the steps:

[0068] (1) Preparation of rod-shaped g-C 3 N 5 , specifically obtained by the following preparation method: 3-amino-1,2,4-triazole (1.5g) was added to KBr solution (10.0g KBr in 30mL H 2 O), after the solution is mixed evenly, it is heated at 80°C to evaporate the water to dryness to obtain a solid mixture of 3-amino-1,2,4-triazole and KBr, and at the same time, the solid mixture is dried to obtain a dry powder; then the dry powder was calcined at a temperature of 500°C for 3h in an air atmosphere (the heating rate was 5-10°C·min -1 ), after cooling, a tan product was obtained; after the tan product was washed with water, suction filtered, and dried, a rod-shaped g-C 3 N 5 ; Meanwhile, rod-shaped g-C was prepared by using the above 3 N 5 The method of us...

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Abstract

The invention discloses a heterogeneous core-shell g-C3N5@MnO2 complex, which takes rod-like g-C3N5 as an inner core, wherein MnO2 nanosheets are compounded on the surface of the inner core, and the heterogeneous core-shell g-C3N5@MnO2 complex has excellent photocatalytic performance and photoelectrocatalytic performance. The invention also discloses a preparation method of the heterogeneous core-shell g-C3N5@MnO2 complex, wherein the method comprises the following steps: uniformly mixing rod-like g-C3N5, KMnO4 and water, transferring the obtained mixed solution into a polytetrafluoroethylenereaction kettle, sealing the polytetrafluoroethylene reaction kettle, and carrying out hydrothermal reaction in a vacuum drying oven; and cooling the reaction kettle to room temperature, washing the obtained reaction solution with water, centrifuging to remove the supernatant, and drying the obtained dark brown precipitate to obtain the heterogeneous core-shell g-C3N5@MnO2 complex. The preparationmethod has the characteristics of simple operation, low cost, environmental protection, no need of complex post-treatment steps, no need of additional addition of a reducing agent, easiness in large-scale preparation and the like.

Description

technical field [0001] The present invention belongs to nitrogen-rich graphitic carbon nitride (g-C 3 N 5 ) modification technical field, relate to the establishment of a kind of heterogeneous core-shell g-C 3 N 5 @MnO 2 complex and based on g-C 3 N 5 The reduction properties of heterogeneous core-shell g-C 3 N 5 @MnO 2 Composite method. Background technique [0002] In recent years, carbonitride materials have attracted more and more attention because of their good chemical stability, controllable energy bandgap, and non-toxicity. Sensing, energy storage, photocatalysis and other fields have broad application prospects. At present, most synthetic carbonitride materials are based on g-C with an energy band gap of 2.7eV. 3 N 4 , due to its abundant synthetic raw materials and simple synthesis, it has been extensively studied. Nevertheless, since g-C 3 N 4 The wide energy bandgap, limited visible-light absorption range, and high radiative recombination rate of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/396B01J35/33B01J35/39
Inventor 王海燕张友玉赵晨曦杜甫佑
Owner CHANGSHA UNIVERSITY
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