CN106006704B - 一种稀土材料微米管及其制备方法 - Google Patents
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- 239000000463 material Substances 0.000 title claims abstract description 35
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 24
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 14
- 229910017584 La2O2SO4 Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 8
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 8
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 8
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 3
- 229910002492 Ce(NO3)3·6H2O Inorganic materials 0.000 claims description 2
- 229910002422 La(NO3)3·6H2O Inorganic materials 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims 1
- 239000004202 carbamide Substances 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- VCSZKSHWUBFOOE-UHFFFAOYSA-N dioxidanium;sulfate Chemical compound O.O.OS(O)(=O)=O VCSZKSHWUBFOOE-UHFFFAOYSA-N 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- ODPUKHWKHYKMRK-UHFFFAOYSA-N cerium;nitric acid Chemical compound [Ce].O[N+]([O-])=O ODPUKHWKHYKMRK-UHFFFAOYSA-N 0.000 description 12
- 239000000047 product Substances 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910002226 La2O2 Inorganic materials 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- -1 rare earth sulfuric acid Salt Chemical class 0.000 description 1
- 238000003836 solid-state method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/56—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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Abstract
一种稀土材料微米管及其制备方法,采用静电纺丝法制备La2O2SO4:Ce3+微米管的前驱物,再通过高温处理得到终产物,既可以控制材料的形貌,又可以降低材料的团聚性,增大了材料的比表面积,对于拓宽稀土硫酸氧盐微米管的应用范围具有一定的意义。
Description
技术领域
本发明涉及新型材料领域,特别涉及一种稀土材料微米管及其制备方法。
背景技术
S元素因其化合价的改变使其在催化,氧存储等领域具有重要的应用价值。La2O2SO4因S元素在La2O2SO4(+6)/La2O2S(-2)存在化合价的变化,同时可释放出2mmol的O2,使La2O2SO4在氧存储领域中具有重要的应用价值,具体过程如下,因此合成La2O2SO4成为人们研究的热点。
目前,常用的稀土硫酸氧盐主要采用高温固相法获得。已报的方法有将稀土硫酸盐在N2或空气中与900℃下保温5h得到。也有将稀土硝酸盐,十二烷基磺酸钠,氨水和水的混合物先于40℃搅拌1h,再在50℃下搅拌5h,收集沉淀,然后高温处理得到产物。其他关于形貌可控和分散性好的稀土硫酸氧盐材料的报道还不多。
发明内容
为解决现有的稀土硫酸氧盐材料块体大,形貌不易控制,材料团聚现象严重等问题,本发明提供一种稀土硫酸氧盐微米管及其制备方法,即采用静电纺丝法制备前驱物,再通过高温处理得到La2O2SO4∶Ce3+微米管,该方法既可以控制微米管的形貌,又可以降低材料的团聚现象,同时,还提供了大的比表面积,对于扩宽稀土硫酸氧盐的应用具有重要的研究意义。
本发明采用的技术解决方案是:先通过静电纺丝法制备前驱物,再通过高温处理得到La2O2SO4∶Ce3+微米管,其通式为La2O2SO4∶Ce3+,其中La∶Ce的比例为1-x∶x,其中0<x≤0.2。
将总物质的量为0.5mmol,物质的量比例为1-x∶x,其中0<x≤0.2的的硝酸镧和硝酸铈,与0.25-0.4g的硫脲和0.5-1.2g的聚乙烯吡咯烷酮一同加入到0.4-1g乙醇与0.4-0.8g水的混合溶液中,搅拌一定时间。将所得溶液置于5ml的注射器中,选用10-15kv的高压,以25-40μL/h的流速进行静电纺丝,调节静电纺丝的针头到接收板的距离,空气的湿度控制在60-80%,温度控制在20-25℃,收集静电纺丝所得纤维,在600-800℃下条件下保温1.5-3h,即得到终产物稀土硫酸氧盐微米管。
所述的搅拌时间大于48h。
所述的静电纺丝的针头到接收板的距离为20-30cm。
所述的600-800℃下条件下保温时的升温速率为1-3℃/h。
所述的硝酸镧为La(NO3)3·6H2O,所述的硝酸铈为Ce(NO3)3·6H2O。
所述的硫脲,聚乙烯吡咯烷酮,乙醇均为分析纯级试剂,水为去离子水。
本发明的有益效果是:本发明提供了一种稀土材料微米管及其制备方法,采用静电纺丝法制备的La2O2SO4∶Ce3+微米管的前驱物,再通过高温处理得到产物,既可以控制材料的形貌,又可以降低材料的团聚性,增大了材料的比表面积,对于提高稀土硫酸氧盐微米管的应用具有一定的意义。
附图说明
图1为本发明实例制得的La2O2SO4∶Ce3+微米管的XRD图谱。
图2为本发明实例制得的La2O2SO4∶Ce3+微米管的SEM照片。
图3为本发明实例制得的硝酸铈的加入量对产物形貌影响的SEM,其中图3a,图3b,图3c中硝酸铈的加入量分别为0%,10%,20%。
图4为本发明实例制得的La2O2SO4∶Ce3+微米管的BET图谱。
具体实施方式
为了能够更清楚地理解本发明的技术内容,特举以下实施例详细说明。
实施例1
将总物质的量为0.5mmol的硝酸镧和硝酸铈,其中硝酸铈的加入量为0.05mmol,与0.25g的硫脲和1.2g的聚乙烯吡咯烷酮一同加入到0.4g乙醇与0.4g水的混合溶液中,搅拌50h。将所得溶液置于5ml的注射器中,选用10-15kv的高压,以25-40μL/h的流速进行静电纺丝,调节静电纺丝的针头到接收板的距离为20cm,空气的湿度控制在60-80%,温度控制在20-25℃,收集静电纺丝所得纤维,在600-800℃条件下保温1.5-3h,升温速率为1-3℃/h,即得到终产物La2O2SO4∶Ce3+微米管。
实施例2
将总物质的量为0.5mmol的硝酸镧和硝酸铈,其中硝酸铈的加入量为0.1mmol,与0.4g的硫脲和0.5g的聚乙烯吡咯烷酮一同加入到1g乙醇与0.8g水的混合溶液中,搅拌50h。将所得溶液置于5ml的注射器中,选用10-15kv的高压,以25-40μL/h的流速进行静电纺丝,调节静电纺丝的针头到接收板的距离为30cm,空气的湿度控制在60-80%,温度控制在20-25℃,收集静电纺丝所得纤维,在600-800℃条件下保温1.5-3h,升温速率为1-3℃/h,即得到终产物La2O2SO4∶Ce3+微米管。
实施例3
将总物质的量为0.5mmol的硝酸镧和硝酸铈,其中硝酸铈的加入量为0.15mmol,与0.3g的硫脲和1g的聚乙烯吡咯烷酮一同加入到0.8g乙醇与0.6g水的混合溶液中,搅拌50h。将所得溶液置于5ml的注射器中,选用10-15kv的高压电条件下,以25-40μL/h的流速进行静电纺丝,调节静电纺丝的针头到接收板的距离为25cm,空气的湿度控制在60-80%,温度控制在20-25℃,收集静电纺丝所得纤维,在600-800℃条件下保温1.5-3h,升温速率为1-3℃/h,即得到终产物La2O2SO4∶Ce3+微米管。
通过XRD确定所得La2O2SO4∶Ce3+微米管的相结构,通过SEM观察所得产物的形貌和Ce3+离子对产物形貌的影响,通过BET来观察产物的比表面积。
试验结果
由图1可以发现随着硝酸铈含量的增加,所制备的产物变成纯的La2O2SO4相,Ce3+取代La3+的位置。
由图2可以发现所制备的产物为微米管结构,微米管的直径在200nm左右,长度在几微米。
由图3可以发现硝酸铈的加入量对所得产物的形貌具有一定的影响,随着硝酸铈的量的增加,所得产物由微米带变成微米管。
由图4可以看出所得微米管具有较大的比表面积。
以上所述仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (7)
1.一种稀土材料微米管,其特征在于,其通式为La2O2SO4:Ce3+,其中La:Ce的物质的量比例为1-x:x,其中0<x≤0.2,所述的稀土材料微米管采用以下方法制备:将总物质的量为0.5 mmol,物质的量比例为1-x:x,其中0<x≤0.2的硝酸镧和硝酸铈,与0.25-0.4 g的硫脲和0.5-1.2 g的聚乙烯吡咯烷酮一同加入到0.4-1 g乙醇与0.4-0.8 g水的混合溶液中,搅拌一定时间,将所得溶液置于5ml的注射器中,选用10-15 kv的高压,以25-40 μL/h的流速进行静电纺丝,调节静电纺丝的针头到接收板的距离,空气的湿度控制在60-80%,温度控制在20-25 ℃,收集静电纺丝所得纤维,在600-800℃下条件下保温1.5-3 h,即得到终产物稀土材料微米管。
2.根据权利要求1所述的一种稀土材料微米管的制备方法,其特征在于,将总物质的量为0.5 mmol,物质的量比例为1-x:x,其中0<x≤0.2的硝酸镧和硝酸铈,与0.25-0.4 g的硫脲和0.5-1.2 g的聚乙烯吡咯烷酮一同加入到0.4-1 g乙醇与0.4-0.8 g水的混合溶液中,搅拌一定时间,将所得溶液置于5mL的注射器中,选用10-15 kV的高压,以25-40 μL/h的流速进行静电纺丝,调节静电纺丝的针头到接收板的距离,空气的湿度控制在60-80%,温度控制在20-25 ℃,收集静电纺丝所得纤维,在600-800℃下条件下保温1.5-3 h,即得到终产物稀土材料微米管。
3.根据权利要求2所述的一种稀土材料微米管的制备方法,其特征在于,所述的搅拌时间大于48h。
4.根据权利要求2所述的一种稀土材料微米管的制备方法,其特征在于,所述的静电纺丝的针头到接收板的距离为20-30 cm。
5.根据权利要求2所述的一种稀土材料微米管的制备方法,其特征在于,所述的600-800℃下条件下保温时的升温速率为1-3 ℃/h。
6.根据权利要求1所述的一种稀土材料微米管的制备方法,其特征在于,所述的硝酸镧为La(NO3)3·6H2O,所述的硝酸铈为Ce(NO3)3·6H2O。
7.根据权利要求1所述的一种稀土材料微米管的制备方法,其特征在于,所述的硫脲、聚乙烯吡咯烷酮、乙醇均为分析纯级试剂,水为去离子水。
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