Method for preparing monodisperse zinc selenide particles
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A monodisperse, zinc selenide technology for binary selenium/tellurium compounds, chemical characterization of fibers, chemical post-processing of rayon, etc.
Inactive Publication Date: 2012-07-25
CHANGCHUN UNIV OF SCI & TECH
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At present, there is no report on the preparation of monodisperse ZnSe par
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[0022] Embodiment: take a certain amount of Zn (NO 3 ) 2 ·6H 2 O and PVP are added to an appropriate amount of DMF solvent, stirred magnetically at room temperature for 6 hours, and left to stand for 3 hours to form a spinning solution. The mass percentages of each component of the spinning solution are: zinc nitrate content 8%, PVP content 14%, the solvent DMF content is 78%; the prepared spinning solution is added to the liquid storage pipe of the spinning device for electrospinning, the inner diameter of the nozzle is 1mm, the angle between the nozzle and the horizontal plane is adjusted to 30°, and a 20kV direct current is applied Voltage, curing distance 22cm, room temperature 20~28℃, relative humidity 45%~65%, get PVP / Zn(NO 3 ) 2 Composite nanofibers, the PVP / Zn(NO 3 ) 2The composite nanofibers were heat-treated in a programmable temperature-controlled furnace with a heating rate of 1°C / min, kept at 600°C for 4 hours, then cooled down to 200°C at a rate of 1°C / min, ...
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Abstract
The invention relates to a method for preparing monodisperse zinc selenide particles, which belongs to the technical field of inorganic material preparation. According to the invention, the monodisperse zinc selenide particles are prepared by using a double-crucible method and combining the electrostatic spinning technique with the selenizing technique. The invention comprises three steps of (1) a spinning solution preparation: adding Zn(NO3)2.6H2O and PVP (polyvinyl pyrrolidone) to a DMF (dimethyl formamide) solvent to form the spinning solution; and (2) preparing composite ZnO nano-fibers by the electrostatic spinning technique, and then carrying out the heat treatment to obtain the composite ZnO nano-fibers; and (3) preparing the monodisperse ZnSe particles: adopting the double-crucible method, carrying out the selenizing process on the ZnO nano-fibers by selenium powder to obtain the monodisperse ZnSe particles with good crystal forms and a diameter of 2.3+/-0.15 microns. The monodisperse ZnSe particle is an important functional material, and will be applied to solar cells, light-emitting diodes, laser devices, biomedicine, panel display, storage and transmission of information, flashers and catalysis. The preparing method is simple and easy, can be used in mass production, and is wide in application prospect.
Description
technical field [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to a method for preparing monodisperse zinc selenide particles. Background technique [0002] Zinc selenide ZnSe crystal belongs to group II-VI semiconductors with direct band gap, and is an excellent luminescent material with a direct transition energy band structure and a forbidden band width of 2.67eV at room temperature. Widely used in light-emitting diodes, lasers, flat panel displays, information storage and transmission, solar cells, chemical and biological sensors, biomedical markers, radiation detectors, semiconductor scintillators, and catalysis. Due to its unique properties, various morphologies of ZnSe, such as nanorods, nanowires, nanoribbons, nanocrystals, nanospheres, polycrystalline nanofilms, tetrapods, flower-like structures, and hollow nanostructures, have been fabricated. The methods used include: hydrothermal method, solvothermal meth...
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