CN1760118A - Method for preparing fine rare earth sulfoxides - Google Patents
Method for preparing fine rare earth sulfoxides Download PDFInfo
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- CN1760118A CN1760118A CN 200510047656 CN200510047656A CN1760118A CN 1760118 A CN1760118 A CN 1760118A CN 200510047656 CN200510047656 CN 200510047656 CN 200510047656 A CN200510047656 A CN 200510047656A CN 1760118 A CN1760118 A CN 1760118A
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- rare earth
- sulfoxides
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Abstract
A process for preparing the superfine RE-sulfur oxide includes such steps as proportionally dissolving RE nitrate, combustion promoter and S-contained incendiary agent in water, putting the solution in furnace, and burning at 300-750 deg.C.
Description
Technical field
The present invention relates to the preparation method of fine rare earth sulfoxides, belong to field of fine chemical.
Background technology
Rare-earth oxide sulfate (Re
2O
2S, Re=rare earth) it is good, water insoluble all to have chemical stability, and oxidation-resistance is strong, the characteristic of fusing point up to 2000～2200 ℃.Main application direction is catalysis and field of light emitting materials.The luminescent material that with the rare-earth oxide sulfate is matrix has the luminous efficiency height, has been widely used in the CRT red illuminating material, X ray luminous material, red light-accumulating luminous material, up-conversion luminescent material etc.There has been several different methods to prepare rare-earth oxide sulfate, as: traditional solid reaction process (is the molten method of sulphur, adopts Na
2CO
3/ K
2CO
3/ K
3PO
4Make flux) [Luuji Ozawa, Preparation of Y
2O
2S:Eu phosphor particles of differentsizes by a flux method, J.Electrochem.Soc., 124 (3) (1977) 413-417], rare earth sulfate under reducing atmosphere direct-reduction process (as H
2/ CO) [John.J.Pitha, Arthur L.Smith, Roland Ward, The preparation of lathuminum oxysulfide and its propertiesas a basic material for phosphors stimulated by infrared, J.Am.Chem.Soc., 69 (1947) 1870-1871], adopt all gases vulcanizing agent (as H
2S/CS
2/ SV+N
2/ Ar etc.) direct sulfuration method [Douglas W.Ormond, Ephraim Banks, Synthesis of rare earth oxysulfidephosphors, J.Electrochem.Soc.122 (1) (1975) 152-154] etc.But the rare-earth oxide sulfate luminescent material coarse size of these method preparations can not realize the oxysulfide nanometer, thereby can not satisfy the application requiring of special dimensions such as more and more higher display resolution and biological detection.
Luminous journal 26 (2) (2005) 194-198] reported that expensive dithio ethanamide is a raw material, earlier the rare earth nitrate fusion is dewatered, mix by mechanical mill with the dithio ethanamide, after further dewatering through 24h again, through the combustion method rare-earth oxide sulfate, complex technical process needs to prepare for a long time, is not suitable for suitability for industrialized production.
Summary of the invention
At above the deficiencies in the prior art, the objective of the invention is to adopt the preparation method of a kind of fine rare earth sulfoxides that a kind of technology is easy, cost is low, synthesize fine rare earth sulfoxides, fine rare earth sulfoxides luminescent material.
The technical solution adopted in the present invention is: with rare earth nitrate, secondary incendiary agent, sulfur-bearing incendiary material, water-soluble one-tenth mixed solution, place 300-750 ℃ kiln, be sulfided into fine rare earth sulfoxides through burning.Rare earth nitrate refers to one or more in the nitrate of Y, Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.Secondary incendiary agent is methyl alcohol, ethanol, propyl alcohol, Virahol, gasoline, diesel oil.The sulfur-bearing incendiary material is thiocarbamide, thioacetamide, dithio ethanamide, mercaptan.The mole proportioning of used rare earth nitrate, secondary incendiary agent, sulfur-bearing incendiary material and water is:
Rare earth nitrate: 1 (benchmark)
Secondary incendiary agent: 0.01～12
Sulfur-bearing incendiary material: 0.5～18
Water: 0.3～30
Best burning sulfurizing temperature range is 350 ℃～650 ℃.The sample that obtains through combustion method can also improve the performance of luminescent material through a heat treatment process.
The invention has the beneficial effects as follows: synthesis temperature is low, has only 300-750 ℃, and lower more than 500 ℃ than traditional solid reaction process, entire reaction course is very fast, has only several minutes to tens minutes usually, can directly prepare very thin oxysulfide material.Technology is easy, and cost is low, is suitable for suitability for industrialized production.
Description of drawings
Fig. 1 is the X-ray diffraction analysis result of the embodiment of the invention 1.
Fig. 2 is the emmission spectrum figure of the embodiment of the invention 3 under the 254nm ultraviolet excitation.
Fig. 3 is the X-ray diffraction analysis result of the embodiment of the invention 4.
Fig. 4 is the up-conversion luminescence spectrum of the embodiment of the invention 4 under the 980nm laser pumping.
Fig. 5 is the up-conversion luminescence spectrum of the embodiment of the invention 5 under the 980nm laser pumping.
Fig. 6 is the up-conversion luminescence spectrum of the embodiment of the invention 6 under the 980nm laser pumping.
Fig. 7 is the up-conversion luminescence spectrum of the embodiment of the invention 7 under the 980nm laser pumping.
Fig. 8 is the luminescent spectrum of the embodiment of the invention 8 under excitation of X-rays.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1
Y (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the thioacetamide of 0.1mol, 10ml dehydrated alcohol, the deionized water of 10ml
Implementation process: above-mentioned raw materials is joined in the container, be dissolved into clear solution not being higher than under 80 ℃.Directly put into then in 400 ℃ the kiln.Combustion reactions was finished in 8-10 minute, obtained white foam shape sample.
Fig. 1 is the X-ray diffraction analysis result of resulting sample, and the principal goods of sample is six side's phase Y mutually
2O
2S.
In the present embodiment, change the temperature of combustion reactions, the Different Results that obtains is: when being lower than 300 ℃, the product incomplete combustion that obtains contains the unreacted organism of part; When being higher than 750 ℃, though can obtain six side's phase Y
2O
2S still, other a large amount of thing phases can occur, as Y
2O
2SO
4In 300 ℃～750 ℃ scopes result is preferably arranged all, best temperature range is 350 ℃～650 ℃.
The effect of secondary incendiary agent is when heating, and at first burning cause combustion reactions, thereby fast reaction speed reduces temperature of reaction simultaneously.Add-on how much, can obviously influence speed of response.Our experiment confirm, at rare earth nitrate: effectively, optimum range is 1: 2～8 in the scope of secondary incendiary agent=1: 0.01～12 (mol ratio).Add-on is (as being less than 1: 0.01) very little, the aid burning DeGrain, and add-on too many (as greater than 1: 12) can further not increase the aid burning effect, but can cause that cost increases.
The effect of water is dissolving rare earth nitrate or sulfur-bearing incendiary material, and the two is mixed.Add-on what, can obviously influence speed of response, but because itself is not the composition of product rare-earth oxide sulfate, what are lighter relatively to the influence of testing for its add-on.Our experiment confirm, at rare earth nitrate: effectively, optimum range is 12～20 in the scope of water=1: 0.3～30 (mol ratio).Add-on is (as being less than 1: 0.3) very little, do not have the effect of dissolving rare earth nitrate or sulfur-bearing incendiary material, and then the product sulfuration is inhomogeneous, and the oxycompound composition; Add-on too many (as greater than 1: 30) then can influence product composition, and impurity components such as rare-earth oxide sulfate middle-weight rare earths oxide compound, rare earth rhodanine salt obviously increase.
Y (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the thiocarbamide of 0.2mol, the Eu (NO of 0.1mol/L
3)
36H
2O spirituous solution 10ml, 10ml anhydrous methanol, the deionized water of 10ml.
Implementation process: above-mentioned raw materials is joined in the container, be dissolved into clear solution not being higher than under 80 ℃.Directly put into then in 400 ℃ the kiln.Combustion reactions is finished in several minutes, obtains white foam shape sample.With this sample (25%N under 1000 ℃ reducing atmosphere
2+ 75%H
2) thermal treatment 2h.The principal goods of sample is six side's phase Y mutually
2O
2S:Eu.The add-on of sulfur-bearing incendiary material thiocarbamide how much, can obviously influence reaction product.Our experiment confirm is at rare earth nitrate: in the scope of thiocarbamide=1: 0.5～18 (mol ratio) result is preferably arranged.Add-on is many more, the principal goods phase Y of sample
2O
2S:Eu content is high more, but can cause that cost increases.Add-on is (as being less than 1: 0.5) very little, and the principal goods that then obtains is Y mutually
2O
3, the Y that we need
2O
2S then becomes less important thing phase.During thermal treatment, be higher than 300 ℃ and just can significantly improve luminosity, and temperature is high more under reducing atmosphere, brightness improves remarkable more, but granularity can obviously increase when being higher than 1200 ℃.When granularity requirements is not strict, 1200 ℃ of thermal treatments can be higher than.
Embodiment 3
Y (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the thioacetamide of 0.1mol, the Eu (NO of 0.1mol/L
3)
36H
2O spirituous solution 10ml, 10ml propyl alcohol, the deionized water of 10ml.
Implementation process is with embodiment 1.
This sample glows at negative ray, X ray, ultraviolet ray excited following, and Fig. 2 is the emmission spectrum figure of resulting sample under the 254nm ultraviolet excitation.
Embodiment 4
La (the NO of proportioning: 11.46g
3)
36H
2The O crystal, the Yb (NO of 1.01g
3)
36H
2O, the Pr (NO of 20ml
3)
36H
2O (0.0025mol/L) ethanolic soln, the thioacetamide of 8.33g, the deionized water of 10ml.
Implementation process is with embodiment 1.
Fig. 3 is the X-ray diffraction analysis result of resulting sample, and the principal goods of sample is six side's phase La mutually
2O
2S.Resulting sample just can observe with the naked eye bright blue-greenish colour up-conversion luminescence under the pumping of 980nm infrared laser.Fig. 4 is the up-conversion luminescence spectrum of this sample under the 980nm laser pumping.
Embodiment 5
Lu (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the thioacetamide of 0.15mol, the Er (NO of 0.00128mol
3)
36H
2The O crystal, 10ml Virahol, the deionized water of 10ml.
Implementation process: above-mentioned raw materials is joined in the container, be dissolved into clear solution not being higher than under 80 ℃.Directly put into then in 400 ℃ the kiln.Combustion reactions is finished in several minutes, obtains white foam shape sample.With this sample thermal treatment 2h in 500 ℃ air, improve 50% through heat treated sample luminosity.The principal goods of sample is six side's phase Lu mutually
2O
2S:Er.Optimum temperature range is 300～800 ℃ during thermal treatment in air, is lower than 300 ℃, and thermal effectiveness is bad, does not have actual application value.When being higher than 800 ℃, oxysulfide can be oxidized to vitriol, influences product performance.
Resulting sample just can observe with the naked eye bright yellow up-conversion luminescence under the pumping of 980nm infrared laser.Fig. 5 is the up-conversion luminescence spectrum of this sample under the 980nm laser pumping.
Embodiment 6
Y (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the dithio ethanamide of 0.15mol, the Ho (NO of 0.00064mol
3)
36H
2The O crystal, 10ml dehydrated alcohol, the deionized water of 10ml.
Implementation process is with embodiment 5.
Resulting sample just can observe with the naked eye bright green up-conversion luminescence under the pumping of 980nm infrared laser.Fig. 6 is the up-conversion luminescence spectrum of this sample under the 980nm laser pumping.
Embodiment 7
Y (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the mercaptan of 0.15mol, the Tm (NO of 0.00032mol
3)
36H
2The O crystal, 10ml dehydrated alcohol, the deionized water of 10ml.
Implementation process is with embodiment 5.
Resulting sample just can observe with the naked eye bright blue up-conversion luminous under the pumping of 980nm infrared laser.Fig. 7 is the up-conversion luminescence spectrum of this sample under the 980nm laser pumping.
Embodiment 8
Gd (the NO of proportioning: 0.0256mol
3)
36H
2The O crystal, the thioacetamide of 0.15mol, the Tb (NO of 0.0000768mol
3)
36H
2The O crystal, 10ml dehydrated alcohol, the deionized water of 10ml.The principal goods of sample is six side's phase Gd mutually
2O
2S:Tb.
Implementation process is with embodiment 5.
Resulting sample just can observe with the naked eye bright green emitting under excitation of X-rays.Fig. 8 is the luminescent spectrum of this sample under excitation of X-rays.
Use the same method and to synthesize the oxysulfide of other rare earth element.Secondary incendiary agent does not produce other organism of a large amount of ash during burning except that the above-mentioned methyl alcohol of mentioning, ethanol, propyl alcohol, Virahol, gasoline, diesel oil, can play similar effect yet.
Claims (5)
1, a kind of preparation method of fine rare earth sulfoxides, it is characterized in that, method steps is: with rare earth nitrate, secondary incendiary agent, sulfur-bearing incendiary material, water-soluble one-tenth mixed solution, place kiln, temperature in the kiln is 300-750 ℃, be sulfided into fine rare earth sulfoxides through burning, the mole proportioning of rare earth nitrate, secondary incendiary agent, sulfur-bearing incendiary material and water is: 1: 0.01～12: 0.5～18: 0.3～30.
2, the preparation method of a kind of fine rare earth sulfoxides according to claim 1, it is characterized in that described rare earth nitrate is one or more in the nitrate of Y, Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu.
3. the preparation method of a kind of fine rare earth sulfoxides according to claim 1 is characterized in that described secondary incendiary agent is methyl alcohol, ethanol, propyl alcohol, Virahol, gasoline, diesel oil.
4, the preparation method of fine rare earth sulfoxides as claimed in claim 1, it is characterized by the sulfur-bearing incendiary material is thiocarbamide, thioacetamide, dithio ethanamide, mercaptan.
5. the preparation method of a kind of fine rare earth sulfoxides according to claim 1 is characterized in that the temperature in the described kiln is 350 ℃～650 ℃.
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|---|---|---|---|
| CNB200510047656XA CN100368283C (en) | 2005-11-05 | 2005-11-05 | Method for preparing fine rare earth sulfoxides |
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| CN100368283C CN100368283C (en) | 2008-02-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100467382C (en) * | 2007-04-29 | 2009-03-11 | 东北大学 | Method for synthesizing rare-earth oxide sulfate nano-grain by high-molecular gel network template |
| CN105129833A (en) * | 2015-07-13 | 2015-12-09 | 盐城工学院 | Method of preparing rare earth oxysulfide with carbon disulfide |
| CN107871793A (en) * | 2016-09-27 | 2018-04-03 | 韩山师范学院 | Silica-based solar cell and its manufacture method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69720448T2 (en) * | 1996-06-21 | 2003-12-24 | Kasei Optonix | RARE SULFATE PHOSPHORUS AND X-RAY DETECTOR THEREFOR |
| DE19810317A1 (en) * | 1998-03-11 | 1999-09-16 | Merck Patent Gmbh | Rare earth metal sulfide pigments useful in paint, lacquer, printing ink, plastics and cosmetics |
| EP1457745B1 (en) * | 2001-06-18 | 2016-06-01 | Konoshima Chemical Co., Ltd. | Rare earth metal oxysulfide cool storage material |
| CN1255508C (en) * | 2002-12-31 | 2006-05-10 | 上海科润光电材料有限公司 | Field emitting white luminuous material containing rare earth element sulfide and its manufacturing method |
| CN1521232A (en) * | 2003-01-27 | 2004-08-18 | 上海科润光电材料有限公司 | Green luminous material containing rare earth element sulfide and its producing method |
| CN1218014C (en) * | 2003-06-16 | 2005-09-07 | 华南师范大学 | Method for low temp solid phuse synthesizing reareearth sulfur oxide fluorescent powder |
-
2005
- 2005-11-05 CN CNB200510047656XA patent/CN100368283C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100467382C (en) * | 2007-04-29 | 2009-03-11 | 东北大学 | Method for synthesizing rare-earth oxide sulfate nano-grain by high-molecular gel network template |
| CN105129833A (en) * | 2015-07-13 | 2015-12-09 | 盐城工学院 | Method of preparing rare earth oxysulfide with carbon disulfide |
| CN107871793A (en) * | 2016-09-27 | 2018-04-03 | 韩山师范学院 | Silica-based solar cell and its manufacture method |
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| Publication number | Publication date |
|---|---|
| CN100368283C (en) | 2008-02-13 |
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Granted publication date: 20080213 Termination date: 20101105 |