Cadmium sulfide nanoflower, preparation thereof and application thereof

A technology of cadmium sulfide and nanoflowers, applied in cadmium sulfide, nanotechnology, inorganic chemistry, etc., can solve the problems of poor dispersion of nanoparticles, easy agglomeration, and small specific surface area, and achieve low equipment loss, good repeatability, and excellent production. The effect of hydrogen performance

Active Publication Date: 2017-08-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanoparticles prepared by this technical scheme have poor dispersion, are easy to agglomerate, and have a small specific surface area

Method used

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  • Cadmium sulfide nanoflower, preparation thereof and application thereof
  • Cadmium sulfide nanoflower, preparation thereof and application thereof
  • Cadmium sulfide nanoflower, preparation thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of Cadmium Sulfide Nanoflowers by Mixed Solvothermal Method of Diethylenetriamine and Ethanol (2∶1)

[0049] Measure 40ml of diethylenetriamine (DETA) and 20ml of ethanol, mix and stir, weigh 2mmol of Cd(AC) 2 2H 2 O and 10 mmol of thiourea were added to the mixed solution and stirred for 30 min until clarification. Transfer to a polytetrafluoroethylene reaction kettle with a volume of 80ml, cover and seal it, put it into a stainless steel sleeve and lock it, place it in a blast drying oven and heat it up to 80°C, keep it warm for 48h, and then cool it down to room temperature naturally. The obtained precipitate was washed once with ethanol solution and twice with deionized water, put into the refrigerator for pre-freezing for 12 hours, and then freeze-dried in a freeze dryer at -60°C for 12 hours under vacuum to obtain a light yellow powder.

[0050] The SEM figure of the material that this embodiment makes is shown in figure 1, the appearance of cadmium...

Embodiment 2

[0052] Compared with Example 1, the only difference is that the ratio of diethylenetriamine (DETA) and ethanol is 1:5, the total amount of mixed solvent and other parameters are equal to Example 1. The prepared cadmium sulfide has a flower-like appearance, a size of 200nm-2μm, and a specific surface area of ​​92.36m2 / g. The hydrogen production rate is 1.34mmol·h -1 g -1 .

Embodiment 3

[0054] Compared with Example 1, the only difference is that the ratio of diethylenetriamine (DETA) and ethanol is 5:1, the total amount of mixed solvent and other parameters are equal to Example 1. The prepared cadmium sulfide has a flower-like appearance, a size of 200nm-2μm, and a specific surface area of ​​65.33m2 / g. The hydrogen production rate is 2.53mmol·h -1 g -1 .

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Abstract

The invention discloses a cadmium sulfide nanoflower. The cadmium sulfide nanoflower is characterized in that a plurality of cadmium sulfide nanosheets are gathered with one other, and are self-assembled to form flower-shaped pelltes. Besides, the invention discloses a preparation method ofthe cadmium sulfide nanoflower. The preparation method comprises the following steps: dispersing and / or dissolving a cadmium source and thiourea into a mixed solution of diethylenetriamine and alcohol; then, performing hydrothermal reaction, solid-liquid separation, washing and freeze-drying to obtain the cadmium sulfide nanoflower. The flower-shaped cadmium sulfide has high (002) surface crystal plane orientation, and has excellent hydrogen production performance.

Description

technical field [0001] The invention belongs to the field of new energy sources for hydrogen production by visible light catalysis, and in particular relates to a flower-shaped cadmium sulfide visible light catalyst prepared by a mixed solvothermal method, and its application in catalytically decomposing water to produce hydrogen under visible light. Background technique [0002] As the energy crisis is approaching, photocatalytic hydrogen production has attracted more and more attention from researchers. Materials with a certain bandgap width will excite photogenerated electrons and holes after being illuminated. If the holes and electrons are separated and transferred to the surface, the corresponding redox reaction will easily occur, thereby achieving the effect of splitting water to generate hydrogen and oxygen. Among them, hydrogen is a clean energy source with extremely high calorific value. If it can be produced on a large scale with low energy consumption, it can bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G11/02B82Y40/00B01J27/04B01J35/02C01B3/04
CPCB01J27/04B01J35/004B01J35/02B01J35/1014C01B3/042C01G11/02C01P2002/72C01P2004/03C01P2004/30C01P2004/61C01P2004/62C01P2006/12Y02E60/36
Inventor 潘军刘一马永进刘文文
Owner CENT SOUTH UNIV
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