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Preparation method and application of ZnO/ZnFe2O4 nano-composites

A nanocomposite material, zinc ferrite technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of inability to meet green chemistry, numerous operation steps, and inappropriate preparation in large quantities, and achieve good sensitivity, raw materials, etc. The effect of easy availability and short response time

Inactive Publication Date: 2017-11-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In many fields ZnO / ZnFe 2 o 4 The preparation methods of nanocomposites mainly include vapor deposition method, hydrothermal method, solid phase method, microwave method, sol-gel method, etc., but these methods currently have relatively harsh reaction conditions and are not easy to control, often requiring high temperature and high pressure reactions. Conditions, many operating steps, high cost, unsuitable for large-scale preparation in industry, etc., cannot meet the requirements of green chemical development

Method used

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  • Preparation method and application of ZnO/ZnFe2O4 nano-composites
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  • Preparation method and application of ZnO/ZnFe2O4 nano-composites

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Preparation of Zinc-Fe Prussian Blue Analog Nanomaterials

[0022] Dissolve zinc nitrate (0.089g, 0.3mmol) in 50mL deionized water to form solution A, add potassium ferricyanide (0.066g, 0.2mmol), sodium dodecylbenzenesulfonate (0.05g) into 50mL deionized water Form a clear solution B, add solution A dropwise to solution B under stirring, continue to stir for half an hour after the drop, keep away from light for 3 days, centrifuge, wash with water and ethanol, collect the yellow precipitate at the bottom of the beaker; place in Dry at 60° C. for 18 hours in a vacuum oven to obtain zinc-iron Prussian blue analogue nanomaterials.

Embodiment 2

[0024] Preparation of Zinc-Fe Prussian Blue Analog Nanomaterials

[0025] Zinc chloride (0.041g, 0.3mmol) was dissolved in 50mL deionized water to form solution A, and potassium ferricyanide (0.066g, 0.2mmol) and polyvinylpyrrolidone (0.08g) were added to 50mL deionized water to form a clear solution B. Add solution A to solution B dropwise under stirring, continue to stir for half an hour after the drop is completed, and age in the dark for 4 days, centrifuge, wash with water and ethanol, and collect the yellow precipitate at the bottom of the beaker. After washing with deionized water or ethanol, dry in a vacuum oven at 80° C. for 24 hours to obtain zinc-iron Prussian blue analogue nanomaterials.

[0026] The structure was confirmed by X-ray powder diffractometer analysis, such as figure 1 The zinc-iron Prussian blue analogue nanomaterial shown is Zn 3 [Fe(CN) 6 ] 2 ·xH 2 O.

[0027] The morphology of the obtained ZnFe Prussian blue analog nanomaterials was characteriz...

Embodiment 3

[0029] Preparation of ZnO / ZnFe 2 o 4 Nanocomposite

[0030] Weigh 20 mg of the zinc-iron Prussian blue analogue nanomaterial in Example 1 or Example 2 into a crucible, place it in a muffle furnace, and perform high-temperature calcination in an air atmosphere. The calcination temperature is 450°C, the heating rate is 2°C / min, and the calcination time is 3h.

[0031] The structure was confirmed by X-ray powder diffractometer analysis, such as figure 2 The material structure composition of the composite material shown is ZnO / ZnFe 2 o 4 nanocomposites.

[0032] Characterization of ZnO / ZnFe obtained by scanning electron microscopy 2 o 4 Morphology of nanocomposites. Such as figure 2 As shown, the resulting ZnO / ZnFe 2 o 4 Nanocomposites are hollow spherical structures with rough surfaces.

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Abstract

The invention discloses a preparation method and application of ZnO / ZnFe2O4 nano-composites. According to the invention, a precipitation method is adopted to prepare a precursor material, and then the precursor material is calcined at high temperature to obtain the ZnO / ZnFe2O4 nano-composites. The preparation method of the ZnO / ZnFe2O4 nano-composites comprises the following steps: dropwise adding an aqueous solution of zinc chloride to an aqueous solution of potassium ferricyanide and a surfactant, stirring to react and standing for a period of time to form suspension liquid, cleaning and carrying out freeze drying to obtain a precursor sample; calcining a precursor at a certain temperature to prepare the ZnO / ZnFe2O4 nanocomposites. The preparation method provided by the invention is simple, green, pollution-free and high in practical level, and the obtained ZnO / ZnFe2O4 nano-composites can be directly used as gas sensitive materials.

Description

technical field [0001] The invention relates to a preparation method and application of a zinc oxide / zinc ferrite nanocomposite material, belonging to the technical field of composite material preparation. Background technique [0002] Zinc oxide (ZnO) is a relatively environmentally friendly material, cheap, less toxic, and biodegradable. It is an important semiconductor functional material with many interesting properties, such as dielectric, piezoelectric, pyroelectric, Semiconductors, acousto-optic, nonlinear optics, photoelectrochemical and electrical properties, etc., so it has extremely high research value. Zinc ferrite (ZnFe 2 o 4 ) as a multi-metal oxide is also an important semiconductor material, and both it and ZnO can be used in the field of gas sensing. However, ZnO nanomaterials have a high working temperature (400-450°C), ZnFe 2 o 4 The gas sensitivity is low and other shortcomings. In recent years, some researchers have proposed to prepare ZnO and ZnFe...

Claims

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Application Information

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IPC IPC(8): C01G49/00B82Y30/00G01N27/12
CPCB82Y30/00C01G49/00C01P2002/72C01P2004/03C01P2004/61C01P2004/82G01N27/127
Inventor 宋学志孙菲菲乔亮王小风谭振权
Owner DALIAN UNIV OF TECH
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