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Graphite-phase nitrogen carbide/cadmium sulfide photocatalytic nano-composite material with burr spherical structure, preparation method and application thereof

A nanocomposite material and spherical structure technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen/synthesis gas production, etc., can solve the problem of affecting reaction efficiency, insufficient specific surface area, and failure to realize burr spherical structure catalyst morphology, etc. question

Active Publication Date: 2020-02-14
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, none of the materials prepared in the above methods have achieved a catalyst morphology with a burr spherical structure, which makes their specific surface area insufficient, which in turn affects the reaction efficiency with water photolysis catalysis, so it is necessary to improve

Method used

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  • Graphite-phase nitrogen carbide/cadmium sulfide photocatalytic nano-composite material with burr spherical structure, preparation method and application thereof
  • Graphite-phase nitrogen carbide/cadmium sulfide photocatalytic nano-composite material with burr spherical structure, preparation method and application thereof
  • Graphite-phase nitrogen carbide/cadmium sulfide photocatalytic nano-composite material with burr spherical structure, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] S1: urea obtains carbonitride by thermal polycondensation;

[0047] S2: adding the graphite phase nitrogen carbide and cadmium sulfide precursor with a mass percentage ratio of 0.50wt% into an appropriate amount of ethylene glycol, stirring and mixing, and ultrasonically dispersing to obtain a precursor reaction solution;

[0048] S3: The precursor reaction solution is rapidly synthesized by the microwave-assisted heating method to rapidly synthesize a graphite phase nitrogen carbide / cadmium sulfide photocatalytic nanocomposite material with a burr spherical structure, specifically:

[0049] S3-1: under the microwave power of 200W, the precursor reaction solution obtained in step S2 is heated from room temperature to 90° C., and kept at this temperature for 10 minutes to obtain a first reaction solution;

[0050] S3-2: continue heating the first reaction solution to 160° C., and keep the temperature for 10 minutes to obtain a second reaction solution;

[0051] S3-3: Co...

Embodiment 2-9

[0052] Embodiment 2-9: the investigation of raw material dosage ratio

[0053] Except that in step S1, the graphite phase nitrogen carbide (g-C 3 N 4 ) and the cadmium sulfide precursor (CdS), other operations were the same as in Example 1, so Examples 2-9 were carried out.

[0054] Table 1. Composite materials prepared with different raw material dosage ratios

[0055]

[0056]

[0057] Microscopic characterization

[0058] The microscopic characterization of the graphitic nitrogen carbide / cadmium sulfide photocatalytic nanocomposite with the burr spherical structure obtained in Example 1 by a number of different means is carried out, and the results are as follows:

[0059] 1. By figure 1 The low magnification scanning electron microscope (SEM) of (a) shows that the graphitic carbonitride compound exhibits a sheet-like stacking structure with a graphene-like structure, and most of the thin-layer stacking and agglomeration present this structure. Depend on figur...

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Abstract

The invention discloses a preparation method of a graphite-phase nitrogen carbide / cadmium sulfide photocatalytic nano-composite material with a burr spherical structure. The method includes the stepsof: S1: subjecting urea to thermal polycondensation to obtain graphite-phase nitrogen carbide; S2: adding 0-4wt% of graphite-phase nitrogen carbide and a cadmium sulfide precursor into a proper amountof ethylene glycol, stirring the substances uniformly, and carrying out ultrasonic dispersion to obtain a precursor reaction solution; and S3: rapidly synthesizing the precursor reaction solution into the graphite-phase nitrogen carbide / cadmium sulfide photocatalytic nano-composite material with a burr spherical structure by microwave-assisted heating method. The graphite-phase nitrogen carbide / cadmium sulfide photocatalytic nano-composite material with a burr spherical structure prepared according to the invention has the advantages of high-efficiency hydrogen production, low price, easy availability, environmental friendliness and the like, and has huge potential in the industrial field of hydrogen production by photolysis of water.

Description

technical field [0001] The invention belongs to the field of photocatalytic nanomaterials, in particular to a graphite phase nitrogen carbide / cadmium sulfide photocatalytic nanocomposite material with a burr spherical structure, a preparation method and application thereof, and the photocatalytic nanocomposite material can be used for photocatalytic water production of hydrogen. Background technique [0002] The utilization of solar photocatalytic water splitting to generate clean hydrogen energy is considered as one of the most promising strategies to solve the global energy dilemma and environmental problems. To date, many semiconductors have been developed as potential candidates for this targeted photocatalytic reaction, such as metal oxides, metal sulfides, and metal oxynitrides, among others. However, most semiconductors such as TiO 2 , SrTiO 3 , ZnS, etc. can only respond to about 4% of the solar energy UV. Therefore, it remains a great challenge to develop photoca...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24C01B3/042C01B2203/0277B01J35/39Y02E60/36
Inventor 刘爱丽王舜金辉乐李俊霍锐郑健宏王继昌
Owner WENZHOU UNIVERSITY
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