CN1559911A - Process for preparing hollow ball of single dispersion cadmium sulfide - Google Patents

Process for preparing hollow ball of single dispersion cadmium sulfide Download PDF

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Publication number
CN1559911A
CN1559911A CNA2004100164968A CN200410016496A CN1559911A CN 1559911 A CN1559911 A CN 1559911A CN A2004100164968 A CNA2004100164968 A CN A2004100164968A CN 200410016496 A CN200410016496 A CN 200410016496A CN 1559911 A CN1559911 A CN 1559911A
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ball
cadmium
monodisperse
mol
hollow
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CN1226192C (en
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谢荣国
李东升
杨德仁
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The invention discloses a method of preparing monodisperse cadmium sulphide hollow balls, adopting a chemical water bath precipitation method, including the following steps: 1) dispersing the uniform-sized silicon oxide ball in the deionized water solution by ultrasonic vibration, adding in sodium citrate as complexing agent and using ammonia water to regulate pH value to 8-13, stirring at constant temperature of 50 deg.C-90 deg.C by magnetic force, then adding in cadmium chloride and thiourea to react for 1-2 hours, so as to form a nuclear shell structure of cadmium sulphide coating silicon oxide ball; 2) using diluted hydrofluoric acid to corrode the kernel of the silicon oxide to obtain the hollow cadmium sulphide ball; 3) adopting centrifugal precipitation and ultrasonic dispersion to circularly wash the ball by the deionized water and anhydrous alcohol so as to eliminate reaction remnants, and then drying to obtain the monodisperse cadmium sulphide hollow ball. The made ball can act as structural basic element to prepare 3D photon crystals with high-refractive index contrast, large duty factor, and complete photonic bandgap.

Description

The method for preparing the monodisperse CdS hollow ball
Technical field
The present invention relates to prepare the method for monodisperse CdS hollow ball.
Background technology
Photonic crystal is the artificial microstructure that can be compared with optical wavelength by its cycle that the material with differing dielectric constant (specific refractory power) is arranged according to certain spacial ordering.As " optical semiconductor ", photonic crystal has the function of unique adjusting light spread state, and, fields such as photon integrated, optical communication integrated at photoelectricity have boundless application prospect.In recent years, the research of three-D photon crystal has caused more and more investigators' interest, and preparation three-D photon crystal method commonly used is that monodispersity balls such as silica spheres or polystyrene are self-assembled into the opal structural with center of area solid matter under the certain force field action.But this preparation method is difficult to prepare large-area ordered structure, and this structure of preparing simultaneously can not satisfy the requirement (being dutycycle>80% and index contrast>2.8) that preparation has the photon crystal material of complete band gap; Also need in opal, to fill again high-index material, and then silicon-dioxide or polystyrene are removed with the method for preferential etch, obtain counter opal structure.
Has high refractive index hollow ball material (as Cadmium Sulfide) has center of area solid matter from composition as structural unit opal structural and utilize, can satisfy the requirement that preparation has the three-D photon crystal of complete photonic band gap, strengthen the photon band gap characteristic of this structure greatly.
Cadmium Sulfide (CdS) is that a kind of very important IV-VI family has direct wide bandgap semiconductor materials, is widely used in electronics, optoelectronic areas.Because this material has high relatively specific refractory power and superior optical property, also is widely used in the photonic material field in recent years.The preparation of hollow cadmium sulphide ball has several different methods, for example adopts lytropic liquid crystals, dithiocarbonic anhydride drop, polystyrene acid particles, both sexes three multipolymers etc. to be template, at first prepares nucleocapsid structure, template is removed obtained cadmium sufide hollow ball then.When the preparation nucleocapsid structure, need to carry out pre-treatment to examining the surface earlier, and because the template that adopts is not a monodispersity, the cadmium sufide hollow ball of these method preparations does not have monodispersity, and the thickness of ball wall is uncontrollable.
Summary of the invention
The objective of the invention is for obtaining to have the three-D photon crystal of complete photonic band gap, the method for the monodisperse CdS hollow ball that a kind of preparation has high refractive index is provided.
The method for preparing the monodisperse CdS hollow ball of the present invention, employing be chemical bath deposition, may further comprise the steps:
1) the uniform monodisperse silica sphere particle of particle diameter is dispersed in the deionized water solution with sonic oscillation, add Trisodium Citrate and do network and agent, and regulate pH value to 8~13 with ammoniacal liquor, 50 ℃~90 ℃ constant temperature magnetic agitation, add Cadmium chloride fine powder and sulphur urine then, the concentration that makes Cadmium chloride fine powder in the solution is 0.001 mol~0.01 mol, and the concentration of sulphur urine is 0.002 mol~0.02 mol, reacted 1~2 hour, and obtained the nucleocapsid structure of Cadmium Sulfide parcel silica spheres;
2) with the hydrofluoric acid corrode silicon dioxide core of dilution, obtain hollow cadmium sulphide ball;
3) adopt centrifugal deposition to add the ultra-sonic dispersion wash cycles with deionized water and dehydrated alcohol, remove reaction residue, oven dry obtains the monodisperse CdS hollow ball.
The hydrofluoric acid concentration that dilutes among the present invention is generally 1%~10%.Monodisperse silica sphere particle can be commercially available or by " Si Tuobu (Stober) method " preparation, particle diameter is that 10nm is to 1000nm.
The inventive method can be regulated the sphere diameter of hollow ball by changing the particle diameter of silicon-dioxide ball template; Change the concentration of Cadmium chloride fine powder and sulphur urine, can regulate the wall thickness of hollow ball.
Method of the present invention is template with the monodisperse silica sphere particle, and silica spheres is compared with polystyrene spheres and can high temperature heat-resistant be handled.By the deposition of chemical bath in alkaline aqueous solution, need not carry out pre-treatment to the silica spheres surface again, just can obtain nucleocapsid structure, method is simple.Chemical corrosion silica core then obtains the monodisperse CdS hollow ball of uniform particle diameter.The monodisperse CdS hollow ball that the present invention makes can be used as structural motif, and preparation has high-index contrast and the big three-D photon crystal of dutycycle, obtains having the three-D photon crystal of complete photonic band gap.Utilization has the hollow cadmium sulphide ball of high refractive index has center of area solid matter from composition as structural unit opal structural, the preparation method is simple, not only can satisfy the requirement that preparation has the three-D photon crystal of complete photonic band gap, strengthen the photon band gap characteristic of this structure greatly, can also regulate the residing position of photon band gap by the sphere diameter and the wall thickness that change hollow ball.
Description of drawings
Fig. 1 is a Cadmium Sulfide nucleocapsid structure transmission electron microscope photo, and wherein: figure a) for the transmission electron microscope photo of Cadmium Sulfide parcel silica spheres nucleocapsid structure, schemes b) be the transmission electron microscope photo of monodisperse hollow cadmium sulphide ball;
Fig. 2 is the transmission electron microscope photo of single cadmium sufide hollow ball, and the upper left corner is its electron diffraction;
Fig. 3 is the field emission scanning electron microscope photo of cadmium sufide hollow ball;
Fig. 4 is the XRD figure spectrum of hollow cadmium sulphide ball.
Embodiment
Embodiment:
1) monodisperse silica sphere particle that is 430nm with 300 milligrams of particle diameters is dispersed in the 250 ml deionized water solution with sonic oscillation, and the Trisodium Citrate that adds 10 milliliter of 0.1 mol is done network and agent, and regulates pH value to 11 with ammoniacal liquor.60 ℃ of constant temperature magnetic agitation, drip the sulphur urine of the Cadmium chloride fine powder of 10 milliliter of 0.1 mol and 50 milliliter of 0.04 mol then, react 2 hours, obtain nucleocapsid structure that Cadmium Sulfide wraps up silica spheres (a) as Fig. 1;
2) with 1 to 10 dilute hydrofluoric acid erosion removal silica core, obtain hollow cadmium sulphide ball;
3) adopt centrifugal deposition to add the ultra-sonic dispersion wash cycles with deionized water and dehydrated alcohol, remove reaction residue, 60 ℃ of oven dry obtain monodisperse CdS hollow ball (as Fig. 1 b).
Fig. 2 is the transmission electron microscope photo of the single cadmium sufide hollow ball that makes, has provided the electron diffraction spot simultaneously among the figure, and visible cadmium sulphide ball is a polycrystalline.
Fig. 3 is a use emission scan electron microscopic observation cadmium sufide hollow ball, has hollow structure really from visible its of wherein broken sample.
Products therefrom is XRD tests its crystalline structure, as shown in Figure 4, the component of visible resulting hollow ball is the Cadmium Sulfide with hexaplanar structure really.

Claims (1)

1. the method for preparing the monodisperse CdS hollow ball is characterized in that may further comprise the steps:
1) the uniform monodisperse silica sphere particle of particle diameter is dispersed in the deionized water solution with sonic oscillation, add Trisodium Citrate and do network and agent, and regulate pH value to 8~13 with ammoniacal liquor, 50 ℃~90 ℃ constant temperature magnetic agitation, add Cadmium chloride fine powder and sulphur urine then, the concentration that makes Cadmium chloride fine powder in the solution is 0.001 mol~0.01 mol, and the concentration of sulphur urine is 0.002 mol~0.02 mol, reacted 1~2 hour, and obtained the nucleocapsid structure of Cadmium Sulfide parcel silica spheres;
2) with the hydrofluoric acid corrode silicon dioxide core of dilution, obtain hollow cadmium sulphide ball;
3) adopt centrifugal deposition to add the ultra-sonic dispersion wash cycles with deionized water and dehydrated alcohol, remove reaction residue, oven dry obtains the monodisperse CdS hollow ball.
CN 200410016496 2004-02-20 2004-02-20 Process for preparing hollow ball of single dispersion cadmium sulfide Expired - Fee Related CN1226192C (en)

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CN1226192C CN1226192C (en) 2005-11-09

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1331757C (en) * 2005-11-23 2007-08-15 南京师范大学 Process for preparing nano-grade cadmium sufide hollow ball
CN101058437B (en) * 2007-04-10 2010-10-06 安徽大学 Liquid state preparation method for nano cadmium sulfide hollow sphere
WO2010121488A1 (en) 2009-04-21 2010-10-28 河北勇龙邦大新材料有限公司 Method and device for producing hollow microspheres
CN101319404B (en) * 2008-06-10 2012-05-16 浙江大学 Method for preparation of hollow spherical cadmium sulfide nanocrystalline
CN104722775A (en) * 2015-03-11 2015-06-24 浙江大学 Two-dimensional hollow palladium nanocrystal and preparation method thereof
CN106513018A (en) * 2016-09-30 2017-03-22 江苏大学 Preparation method and application of ZnFe2O4@CdS composite photocatalyst with core-shell structure
CN111629993A (en) * 2017-12-28 2020-09-04 D.施华洛世奇两合公司 Method and apparatus for manufacturing photonic crystal
TWI853797B (en) 2017-12-28 2024-09-01 奧地利商施華洛世奇股份有限公司 Method and apparatus for manufacturing photonic crystals

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1331757C (en) * 2005-11-23 2007-08-15 南京师范大学 Process for preparing nano-grade cadmium sufide hollow ball
CN101058437B (en) * 2007-04-10 2010-10-06 安徽大学 Liquid state preparation method for nano cadmium sulfide hollow sphere
CN101319404B (en) * 2008-06-10 2012-05-16 浙江大学 Method for preparation of hollow spherical cadmium sulfide nanocrystalline
WO2010121488A1 (en) 2009-04-21 2010-10-28 河北勇龙邦大新材料有限公司 Method and device for producing hollow microspheres
CN104722775A (en) * 2015-03-11 2015-06-24 浙江大学 Two-dimensional hollow palladium nanocrystal and preparation method thereof
CN106513018A (en) * 2016-09-30 2017-03-22 江苏大学 Preparation method and application of ZnFe2O4@CdS composite photocatalyst with core-shell structure
CN106513018B (en) * 2016-09-30 2019-08-02 江苏大学 A kind of core-shell structure ZnFe2O4The preparation method and its usage of@CdS composite photo-catalyst
CN111629993A (en) * 2017-12-28 2020-09-04 D.施华洛世奇两合公司 Method and apparatus for manufacturing photonic crystal
US11473213B2 (en) * 2017-12-28 2022-10-18 D. Swarovski Kg Method and apparatus for manufacturing photonic crystals
CN111629993B (en) * 2017-12-28 2024-01-30 D.施华洛世奇两合公司 Method and apparatus for fabricating photonic crystals
TWI853797B (en) 2017-12-28 2024-09-01 奧地利商施華洛世奇股份有限公司 Method and apparatus for manufacturing photonic crystals

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