CN102392327A - Preparation method of cerium-doped yttrium aluminium garnet nanobelt - Google Patents
Preparation method of cerium-doped yttrium aluminium garnet nanobelt Download PDFInfo
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- CN102392327A CN102392327A CN2011103764935A CN201110376493A CN102392327A CN 102392327 A CN102392327 A CN 102392327A CN 2011103764935 A CN2011103764935 A CN 2011103764935A CN 201110376493 A CN201110376493 A CN 201110376493A CN 102392327 A CN102392327 A CN 102392327A
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Abstract
The invention relates to a preparation method of a cerium-doped yttrium aluminium garnet nanobelt, belonging to the technical field of nano-material preparation. According to the prior art, cerium-doped yttrium aluminium garnet nanoparticles and nanofibers are prepared. The method disclosed herein comprises the following three steps: (1) preparing a spinning solution comprising 10 wt% of nitrate, 22 wt% of polyvinylpyrrolidone (PVP) and 68 wt% of a solvent of N,N-dimethyl formamide (DMF); (2) preparing a PVP/[Y(NO3)3+Al(NO3)3+Ce(NO3)3] nanobelt by using a static spinning technique and a vertical spray mode under the conditions of a voltage of 10 kV, a solidification distance of 18 cm, a syringe needle nozzle internal diameter of 1.0 mm, a room temperature of 18-28 DEG C, and a relative humidity of 50-70 %; (3) preparing a yttrium aluminium garnet: 1% Ce3+ nanobelt by carrying out heat treatment on a composite nanobelt under the condition of a heating rate of 1 DEG C/min, keeping warm for 8 h at the temperature of 900 DEG C, then cooling the composite nanobelt to 200 DEG C with the a cooling rate of 1 DEG C/min and then naturally cooling to room temperature. The prepared nanobelt has a width of 2.35-4.73 mu m, a thickness of 130-330 nm, a length of larger than 100 mum, and good crystallinity. The preparation method is easy to operate, can be used for batch production, and has a wide application prospect.
Description
Technical field
The present invention relates to the nano material preparation technical field, relate to a kind of preparation method of cerium-doped yttrium aluminum garnet nano band specifically.
Background technology
The preparation of inorganic matter nano belt and property research are one of forward position focus of subject researchs such as material science, Condensed Matter Physics, chemistry at present.Nano belt is a kind of nano material that is banded structure of synthesizing with manual method, and its cross section is a rectangular configuration, and its thickness is in nanometer scale, and width can reach micron order, and length can reach the hundreds of micron, even several millimeters.Nano belt is owing to the performances such as novel structure and unique light, electricity, magnetic that it is different from pipe, wire material cause people's great attention.
Yttrium-aluminium-garnet Y
3Al
5O
12, be called for short YAG, have cubic crystal structure, have good thermal conductivity, optics, mechanical strength and good physics and chemical property.The luminescent material that with YAG is the matrix doping with rare-earth ions is that more satisfactory light, electric work can materials, is widely used in fields such as laser, luminous demonstrations, has received common attention.Cerium doped yttrium aluminum garnet Y
3Al
5O
12: Ce
3+, be called for short YAG:Ce
3+, be a kind of yellow fluorescent powder, what receive blue light diode LED excites the generation white light, and this light source has that power consumption is few, and reliability is high, and response is fast, advantages such as safety and environmental protection, so Y
3Al
5O
12: Ce
3+The research of fluorescent material has received great attention.People are to YAG and YAG:Ce in recent years
3+The research of nano material mainly concentrates on the nano-powder, and the preparation method mainly contains combustion synthesis method, sol-gel process, hydro-thermal and solvent thermal synthetic method, coprecipitation etc.Zhang Huashan etc., adopt citric acid-gel combustion method prepared the YAG nano-powder (developing material and application, 2005,20 (3), 5-13); Wang Hongzhi, et al adopt coprecipitation prepared the YAG nano-powder (Materials Science and Engineering, 2000,288,1-4); Tao Xutang etc. adopt coprecipitation to prepare YAG monocrystal nano powder (Chinese invention patent, application number: 200810015683.2); Huang Yong etc., the microemulsion system of employing Water-In-Oil (W/O) structure has prepared nanometer-grade spherical YAG powder (Chinese invention patent, application number: 200710118421.4); Summer sea equality adopts NH
4HCO
3With NH
3H
2The mixed solution of O utilizes coprecipitation to prepare rare earth ion doped yttrium aluminum garnet nano phosphor powder (Chinese invention patent, application number: 200910100593.8) as compound precipitants; Fu Y.P., et al has prepared YAG:Ce with firing method
3+Fluorescent nano particle (Journal of Alloys and Compounds, 2006,414 (1-2): 181); People such as Zhang Kai adopt coprecipitation to obtain YAG:Ce
3+Nano-phosphor (mechanical engineering material, 2007,31 (1): 53-56); People such as Long Zhen adopt co-precipitation-rheology phase method to synthesize YAG:Ce
3+Fluorescent material (Chinese rare-earth journal, 2010,28 (4): 400-402); People such as Jia Naitao adopt solvent-thermal method to prepare YAG:Ce
3+Powder (Shandong Light Ind College journal, 2009,23 (3): 33-36); Dong Xiangting etc., adopt electrostatic spinning technique prepared the yttrium aluminum garnet nano fiber (silicate journal, 2009,37 (4), 580-585); Dong Xiangting etc. adopt electrostatic spinning technique to prepare rare earth garnet type compound nano fiber (Chinese invention patent, application number: 200810050467.1).In order to explore the YAG:Ce of new structure
3+Nano luminescent material, preparation YAG:Ce
3+Nano belt is very important.Do not see YAG:Ce at present
3+The report of nano belt preparation.
The patent No. is the technical scheme that 1975504 United States Patent (USP) discloses a relevant electrospinning process (electrospinning); This method is a kind of effective ways that prepare continuous, as to have macro length micro nanometer fiber, is at first proposed in 1934 by Formhals.This method mainly is equipped with high polymer nanometer fiber with the metric system; It is characterized in that making charged Polymer Solution or melt in electrostatic field, to receive the traction of electrostatic force and spray, invest the receiving screen on opposite, thereby realize wire drawing by nozzle; Then; Solvent evaporation at normal temperatures, perhaps melt is cooled to normal temperature and solidifies, and obtains micro nanometer fiber.Over nearly 10 years, occurred adopting electrospinning process to prepare the technical scheme of inorganic compound such as oxidate nano fiber at the inorfil preparing technical field, described oxide comprises TiO
2, ZrO
2, Y
2O
3, Y
2O
3: RE
3+(RE
3+=Eu
3+, Tb
3+, Er
3+, Yb
3+/ Er
3+), NiO, Co
3O
4, Mn
2O
3, Mn
3O
4, CuO, SiO
2, Al
2O
3, V
2O
5, ZnO, Nb
2O
5, MoO
3, CeO
2, LaMO
3(M=Fe, Cr, Mn, Co, Ni, Al), Y
3AI
5O
12, La
2Zr
2O
7Deng metal oxide and composite oxide of metal.Existing people utilizes electrostatic spinning technique successfully to prepare high molecular nanometer band (Materials Letters, 2007,61:2325-2328; Journal of Polymer Science:Part B:Polymer Physics, 2001,39:2598-2606).Someone utilizes the organic compound of tin, uses electrostatic spinning technique to combine with the metallo-organic compound decomposition technique and has prepared porous SnO
2Nano belt (Nanotechnology, 2007,18:435704); Someone utilizes electrostatic spinning technique at first to prepare PEO/ stannic hydroxide composite Nano band, and its roasting has been obtained porous SnO
2Nano belt (J.Am.Ceram.Soc., 2008,91 (1): 257-262).At present, do not see that YAG:Ce is arranged
3+The relevant report of nano belt preparation.Therefore, YAG:Ce
3+Nano belt is very rising nano luminescent material, is again the inorganic matter nano belt of novel structure, has broad application prospects.
When utilizing electrostatic spinning technique to prepare nano material, the composition of the kind of raw material, the molecular weight of high polymer templates, spinning solution, spinning process parameter and Technology for Heating Processing all have material impact to the pattern and the size of final products.The present invention adopts electrostatic spinning technique, with yttrium nitrate Y (NO
3)
36H
2O, cerous nitrate Ce (NO
3)
36H
2O and aluminum nitrate Al (NO
3)
39H
2O is a raw material, and polyvinylpyrrolidone PVP, molecular weight are 90000 as high polymer templates, and N, dinethylformamide DMF are solvent, under the experiment condition of the best, prepare PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band, again through obtaining the YAG:Ce of novel structure after the high-temperature process
3+Nano belt, in the present invention, the mole percent of the cerium ion of doping is 1%, is labeled as YAG:1%Ce
3+, i.e. that the present invention is prepared is YAG:1%Ce
3+Nano belt.
Summary of the invention
Preparation YAG:Ce in background technology
3+The method of nano-powder mainly contains combustion synthesis method, sol-gel process, hydro-thermal and solvent thermal synthetic method, coprecipitation etc., and what adopt the electrostatic spinning technique preparation is yttrium aluminum garnet nano fiber and rare earth garnet type compound nano fiber.Use electrostatic spinning technique in the background technology prepares high molecular nanometer band and SnO
2Nano belt etc., employed raw material, template and solvent are all different with method of the present invention.
The present invention is achieved in that and at first prepares the spinning solution with certain viscosity that is used for electrostatic spinning, uses electrostatic spinning technique and carries out electrostatic spinning, prepares PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band, obtain YAG:1%Ce through after the high-temperature heat treatment again
3+Nano belt.The steps include:
(1) preparing spinning solution
What used in yttrium source and cerium source in the spinning solution is yttrium nitrate and cerous nitrate, and what used in the aluminium source is aluminum nitrate, and high polymer templates adopts polyvinylpyrrolidone PVP; Molecular weight is 90000, and solvent adopts N, dinethylformamide DMF; Take by weighing a certain amount of yttrium nitrate, cerous nitrate and aluminum nitrate, wherein Y
3+With Ce
3+Mol ratio be 99: 1, i.e. Ce
3+Mole percent be 1%, [Y
3++ Ce
3+] and Al
3+Mol ratio be 3: 5, be dissolved in an amount of DMF solvent, take by weighing a certain amount of PVP again and join in the above-mentioned solution, stir 6h in the room temperature lower magnetic force; PVP dissolves fully, is placed into then and leaves standstill 2h in the closed container, till the solution clarification; No bubble exists, and obtains even, transparent and the precursor sol of certain viscosity is arranged, and promptly forms spinning solution; The mass percent of this each part of spinning solution is: nitrate content 10%, PVP content 22%, solvent DMF content 68%;
(2) preparation PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band
Adopt electrostatic spinning technique, technical parameter is: voltage is 10kV, and the syringe needle nozzle is 18cm to the curing distance of receiving screen; The internal diameter of syringe needle nozzle is 1.0mm; Adopt the perpendicular vertically downward spray mode of syringe needle, 18 ℃～28 ℃ of indoor temperatures, relative humidity is 50%～70%;
(3) preparation YAG:1%Ce
3+Nano belt
With the PVP/ that is obtained [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band carries out heat treatment, technical parameter is: heating rate is 1 ℃/min, at 900 ℃ of insulation 8h, naturally cools to room temperature after reducing to 200 ℃ with the speed of 1 ℃/min then, so far obtains YAG:1%Ce
3+Nano belt.
Prepared YAG:1%Ce in said process
3+The width of nano belt is 2.35～4.73 μ m, and thickness is 130～330nm, and length has good crystallinity greater than 100 μ m, belongs to cubic system, has realized goal of the invention.
Description of drawings
Fig. 1 is PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the SEM photo of composite Nano band;
Fig. 2 is YAG:1%Ce
3+The XRD spectra of nano belt;
Fig. 3 is YAG:1%Ce
3+The SEM photo of nano belt, this figure double as Figure of abstract;
Fig. 4 is YAG:1%Ce
3+The EDS spectrogram of nano belt;
Fig. 5 is YAG:1%Ce
3+The exciting light spectrogram of nano belt;
Fig. 6 is YAG:1%Ce
3+The emission spectrum figure of nano belt.
The specific embodiment
Yttrium nitrate Y (the NO that the present invention selected for use
3)
36H
2O, cerous nitrate Ce (NO
3)
36H
2O, aluminum nitrate Al (NO
3)
39H
2O, polyvinylpyrrolidone PVP, molecular weight 90000, N, dinethylformamide DMF is commercially available analysis net product; Used glass apparatus and equipment are commonly used in the laboratory.
Embodiment: take by weighing a certain amount of yttrium nitrate, cerous nitrate and aluminum nitrate, wherein Y
3+With Ce
3+Mol ratio be 99: 1, i.e. Ce
3+Mole percent be 1%, [Y
3++ Ce
3+] and Al
3+Mol ratio be 3: 5, be dissolved in an amount of DMF solvent, take by weighing a certain amount of PVP again and join in the above-mentioned solution, stir 6h in the room temperature lower magnetic force; PVP dissolves fully, is placed into then and leaves standstill 2h in the closed container, till the solution clarification; No bubble exists, and obtains even, transparent and the precursor sol of certain viscosity is arranged, and promptly forms spinning solution; The mass percent of this each part of spinning solution is: nitrate content 10%, PVP content 22%, solvent DMF content 68%; The spinning solution for preparing is added in the syringe of device for spinning, carry out electrostatic spinning, technical parameter is: voltage is 10kV; The syringe needle nozzle is 18cm to the curing distance of receiving screen; The internal diameter of syringe needle nozzle is 1.0mm, adopts the perpendicular vertically downward spray mode of syringe needle, 18 ℃～28 ℃ of indoor temperatures; Relative humidity is 50%～70%, obtains PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band.With prepared PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band carries out heat treatment, technical parameter is: heating rate is 1 ℃/min, at 900 ℃ of insulation 8h, naturally cools to room temperature after reducing to 200 ℃ with the speed of 1 ℃/min then, obtains YAG:1%Ce
3+Nano belt.Prepared PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] composite Nano belt surface smooth, see shown in Figure 1.Prepared YAG:1%Ce
3+Nano belt has good crystal formation, the interplanar distance d value of its diffraction maximum and relative intensity and Y
3Al
5O
12The listed d value of PDF standard card (33-0040) consistent with relative intensity, belong to cubic system, space group is I
a3d sees shown in Figure 2.Prepared YAG:1%Ce
3+The width of nano belt is 2.35～4.73 μ m, and thickness is 130～330nm, and length is seen shown in Figure 3 greater than 100 μ m.YAG:1%Ce
3+Nano belt is formed (the Au conductive layer of surface plating when Au comes from the SEM sample preparation) by Y, Al, Ce and O element, sees shown in Figure 4.When the monitoring wavelength is 525nm, prepared YAG:1%Ce
3+The excitation spectrum main peak of nano belt is positioned at the strong broad band at 460nm place, belongs to Ce
3+Ion
2F
7/2The transition of → 5d is seen shown in Figure 5.460nm blue-light excited down, YAG:1%Ce
3+Nano belt is launched the bright gold-tinted that main peak is positioned at 525nm, and it is corresponding to Ce
3+Ion
5D
0→
7F
1Transition is seen shown in Figure 6.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (2)
1. the preparation method of a cerium-doped yttrium aluminum garnet nano band is characterized in that, adopts electrostatic spinning technique; Use polyvinylpyrrolidone PVP to be high polymer templates, adopt N, dinethylformamide DMF is a solvent; The preparation product is the cerium ion-doped yttrium aluminum garnet nano belt, the steps include:
(1) preparing spinning solution
What used in yttrium source and cerium source in the spinning solution is yttrium nitrate and cerous nitrate, and what used in the aluminium source is aluminum nitrate, and high polymer templates adopts polyvinylpyrrolidone PVP; Solvent adopts N; Dinethylformamide DMF takes by weighing a certain amount of yttrium nitrate, cerous nitrate and aluminum nitrate, wherein Y
3+With Ce
3+Mol ratio be 99: 1, i.e. Ce
3+Mole percent be 1%, [Y
3++ Ce
3+] and Al
3+Mol ratio be 3: 5, be dissolved in an amount of DMF solvent, take by weighing a certain amount of PVP again and join in the above-mentioned solution, stir 6h in the room temperature lower magnetic force; PVP dissolves fully, is placed into then and leaves standstill 2h in the closed container, till the solution clarification; No bubble exists, and obtains even, transparent and the precursor sol of certain viscosity is arranged, and promptly forms spinning solution; The mass percent of this each part of spinning solution is: nitrate content 10%, PVP content 22%, solvent DMF content 68%;
(2) preparation PVP/ [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band
Adopt electrostatic spinning technique, technical parameter is: voltage is 10kV, and the syringe needle nozzle is 18cm to the curing distance of receiving screen; The internal diameter of syringe needle nozzle is 1.0mm; Adopt the perpendicular vertically downward spray mode of syringe needle, 18 ℃～28 ℃ of indoor temperatures, relative humidity is 50%～70%;
(3) preparation YAG:1%Ce
3+Nano belt
With the PVP/ that is obtained [Y (NO
3)
3+ Al (NO
3)
3+ Ce (NO
3)
3] the composite Nano band carries out heat treatment, technical parameter is: heating rate is 1 ℃/min, at 900 ℃ of insulation 8h, naturally cools to room temperature after reducing to 200 ℃ with the speed of 1 ℃/min then, obtains YAG:1%Ce
3+Nano belt, width are 2.35～4.73 μ m, and thickness is 130～330nm, and length is greater than 100 μ m.
2. the preparation method of a kind of cerium-doped yttrium aluminum garnet nano band according to claim 1 is characterized in that, high polymer templates is the polyvinylpyrrolidone of molecular weight Mr=90000.
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Cited By (3)
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|---|---|---|---|---|
| WO2013170547A1 (en) * | 2012-05-14 | 2013-11-21 | Mao Yingjun | Warming and heat storage fiber, and preparation method and textile thereof |
| WO2013170551A1 (en) * | 2012-05-14 | 2013-11-21 | Mao Yingjun | Temperature-reducing and cooling fiber, preparation method, and textile |
| CN107115858A (en) * | 2017-05-04 | 2017-09-01 | 东北师范大学 | MoO3/CeO2/Al2O3The method of tri compound nanofiber degraded indoor formaldehyde |
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| WO2013170547A1 (en) * | 2012-05-14 | 2013-11-21 | Mao Yingjun | Warming and heat storage fiber, and preparation method and textile thereof |
| WO2013170551A1 (en) * | 2012-05-14 | 2013-11-21 | Mao Yingjun | Temperature-reducing and cooling fiber, preparation method, and textile |
| CN107115858A (en) * | 2017-05-04 | 2017-09-01 | 东北师范大学 | MoO3/CeO2/Al2O3The method of tri compound nanofiber degraded indoor formaldehyde |
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Application publication date: 20120328 |