CN103084137B - 带有胺基的介孔氧化铁结构体及其制备方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 150000001412 amines Chemical class 0.000 title abstract description 5
- CUPCBVUMRUSXIU-UHFFFAOYSA-N [Fe].OOO Chemical compound [Fe].OOO CUPCBVUMRUSXIU-UHFFFAOYSA-N 0.000 title abstract 3
- 229910021519 iron(III) oxide-hydroxide Inorganic materials 0.000 title abstract 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 51
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910015189 FeOx Inorganic materials 0.000 claims abstract description 13
- 239000004094 surface-active agent Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 125000003368 amide group Chemical group 0.000 claims description 47
- 238000002360 preparation method Methods 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical group OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 1
- 229960002089 ferrous chloride Drugs 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 20
- 150000001450 anions Chemical class 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000009257 reactivity Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract 3
- 125000003277 amino group Chemical group 0.000 abstract 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract 3
- 238000001035 drying Methods 0.000 abstract 1
- 150000002978 peroxides Chemical class 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 117
- 229910052785 arsenic Inorganic materials 0.000 description 8
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 description 5
- 235000011152 sodium sulphate Nutrition 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 235000013980 iron oxide Nutrition 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 229940083575 sodium dodecyl sulfate Drugs 0.000 description 4
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229920002148 Gellan gum Polymers 0.000 description 2
- IHTAVMHKEISGKU-UHFFFAOYSA-N N[SiH3].N[SiH3] Chemical compound N[SiH3].N[SiH3] IHTAVMHKEISGKU-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 235000010492 gellan gum Nutrition 0.000 description 2
- 239000000216 gellan gum Substances 0.000 description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical group [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/04—Ferrous oxide [FeO]
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
本发明涉及在具有大比表面积的FeOx表面上带有与负离子重金属的反应性高的胺基,从而能够有效地去除水中的负离子重金属的带有胺基的介孔FeOx结构体及其制备方法。根据本发明一个实例的带有胺基的介孔FeOx结构体制备方法,其特征在于,包括如下步骤:第一步骤,混合氯化铁(FeCl2)水溶液和表面活性剂;第二步骤,在氯化铁(FeCl2)水溶液和表面活性剂的水溶液中混合过氧化氢;第三步骤,对上述第二步骤的混合液进行离心分离之后,干燥固体物质来制备粉末状的介孔FeOx结构体;以及第四步骤,将上述介孔FeOx结构体分散于无水甲苯之后,注入氨基硅烷来使氨基硅烷和介孔FeOx结构体进行反应,从而在介孔FeOx结构体的表面带有胺基。
Description
技术领域
本发明涉及一种带有胺基的介孔氧化铁(FeOx)结构体及其制备方法(Amine functionalized mesoporous iron oxides and method forfabricating the same)。更具体地涉及在具有大比表面积的FeOx表面上带有与负离子重金属的反应性高的胺基,从而能够有效地去除水中的负离子重金属的带有胺基的介孔FeOx结构体及其制备方法。
背景技术
废水中包含有机物以外的多种重金属,由于这种重金属借助普通的生物学废水处理方法也不能被去除,因此揭示了利用吸附剂来去除的方式。
目前,正活跃地进行关于附着及去除重金属等无机物的吸附剂的研究,代表例为如下:利用赤铁矿(hematite)的铅(Zn),镉(Cd)等的2价重金属去除方法(荣等人,Jeon et al.;水研究,Water Research;38卷,Vol.38;2499-2504),利用结冷胶凝胶珠(gellan gum gel beads)的铅(Pb),铜(Cu)去除方法(拉萨罗等人,Lazaro et al.;水研究,Water Research;37卷,Vol.37;2118-2126)。
并且,作为去除砷、铬之类的负离子重金属的方法,代表性的是,在韩国授权专利第553179号公开的利用氧化铝的方法。但由于氧化铝的比表面积小,气孔体积小,因此砷吸附量少,气孔形态不均匀,据此,完成饱和时所需的时间也长。
现有技术文献
专利文献
(专利文献1)韩国授权专利第553179号
发明内容
(要解决的技术问题)
本发明是为了解决如上所述的问题而提出的,其目的在于,提供一种在具有大比表面积的FeOx表面上带有与负离子重金属的反应性高的胺基,从而能够有效地去除水中的负离子重金属的带有胺基的介孔FeOx结构体及其制备方法。
(解决问题的手段)
用于达成上述目的的根据本发明一个实例的带有胺基的介孔FeOx结构体制备方法,其特征在于,包括如下步骤:第一步骤,混合氯化铁(FeCl2)水溶液和表面活性剂;第二步骤,在氯化铁(FeCl2)水溶液和表面活性剂的水溶液中混合过氧化氢;第三步骤,对上述第二步骤的混合液进行离心分离之后,干燥固体物质来制备粉末状的介孔FeOx结构体;以及第四步骤,将上述介孔FeOx结构体分散于无水甲苯之后,注入氨基硅烷来使氨基硅烷和介孔FeOx结构体进行反应,从而在介孔FeOx结构体的表面带有胺基。
上述表面活性剂可以是十二烷基硫酸钠(SDS,sodiumdodecylsulfate),上述氨基硅烷和介孔FeOx结构体能够以1:1的质量比进行反应。并且,将上述介孔FeOx结构体分散于无水甲苯时,在每1g的介孔FeOx结构体中可以混合20ml~40ml的无水甲苯。上述氨基硅烷可以利用3-氨基丙基三甲氧基硅烷[(3-aminopropyl)trimethoxysilane]。在将上述第四步骤的上述介孔FeOx结构体分散于无水甲苯的过程及注入氨基硅烷的过程中,可以注入氮来去除氧,并可以防止无水甲苯的蒸发。
(发明的效果)
根据本发明实例的带有胺基的介孔FeOx结构体及其制备方法具有如下效果。随着在比表面积大的大介孔FeOx结构体的表面带有胺基,能够通过胺基来选择性地仅去除负离子重金属(例如,砷,铬)。
附图说明
图1是根据本发明一实施例而制备的带有胺基的介孔FeOx结构体的照片。
图2是根据本发明一实施例而制备的带有胺基的介孔FeOx结构体的X射线衍射(XRD,X-ray diffraction)分析结果。
图3是根据本发明一实施例而制备的带有胺基的介孔FeOx结构体的透射电子显微镜(TEM,Transmission electron microscope)照片。
具体实施方式
本说明书中,FeOx作为非晶质氧化铁,例如,可以是氧化铁(FeO)、三氧化二铁(Fe2O3)中任一个或者也可以是这些化合物的混合物。
本发明的实例,其特征在于,形成介孔FeOx结构体之后,在介孔FeOx结构体的表面上附着胺基(amine)来最终制备带有胺基的介孔FeOx结构体。加上上述比表面积大的介孔FeOx结构体的吸附性能,并通过胺基来可以使砷、铬等的负离子重金属的吸附及去除效率成加倍。
根据本发明实例的带有胺基的介孔FeOx结构体的制备方法主要分为,1)介孔FeOx结构体的制备和,2)胺基的附着。
首先,1)就介孔FeOx结构体的制备而言,例如,可以将氯化铁(FeCl2)溶液、表面活性剂及氧化剂作为前驱体来进行,2)就胺基的附着而言,能够通过搅拌已制备的介孔FeOx结构体和氨基硅烷(amino-silane)来在介孔FeOx结构体的表面附着胺基。
制备介孔FeOx结构体时,作为表面活性剂可以利用十二烷基硫酸钠(SDS,sodium dodecylsulfate),作为上述氧化剂可以利用过氧化氢(H2O2)。上述氧化剂具有对氯化铁进行氧化来使其衍生为粉末状的介孔FeOx结构体的作用。并且,附着胺基时,1:1的质量比供应氨基硅烷与介孔FeOx结构体,可以使用3-氨基丙基三甲氧基硅烷[(3-aminopropyl)trimethoxysilane]等多种形态的氨基硅烷。
如上所述的本发明的带有胺基的FeOx制备方法的具体实施例如下。
<实施例1:制备带有胺基的FeOx>
混合200ml的0.20M FeCl2和45ml的0.08M十二烷基硫酸钠(SDS,sodium dodecylsulfate)之后搅拌6小时。接着,在FeCl2和十二烷基硫酸钠(SDS)的混合溶液中以一滴一滴的方式滴入50ml的0.3M H2O2溶液来进行反应,并搅拌(stirring)了约1小时左右。上述十二烷基硫酸钠(SDS,sodium dodecylsulfate)为表面活性剂,上述H2O2溶液为用于氧化FeCl2的氧化剂。
然后,利用离心分离器(3000rpm,15分钟)来对上述经过混炼的溶液进行了固液分离。利用蒸馏水来洗涤3次已分离的固体物质之后,再次进行离心分离来分离了液态物质。在100℃烘箱中干燥约4小时最终分离的固体物质,来制备了具有浅古铜色的介孔结构的FeOx粉末(介孔FeOx结构体)。
接着,向装有无水甲苯(anhydrous toluene)的烧瓶注入已制备的介孔FeOx结构体来进行了分散。此时,为了去除烧瓶内的氧,在烧瓶持续地注入了规定量的氮。为了介孔FeOx结构体的均匀的分散,每1g的介孔FeOx结构体需要20ml~40ml的无水甲苯。
在无水甲苯中介孔FeOx结构体已分散的状态下,投入过量的氨基硅烷(amino-silane)。为了使氨基硅烷和介孔FeOx结构体以1:1的质量比进行反应,优选的是,充分地投入氨基硅烷。并且,就本实验而言,使用了3-氨基丙基三甲氧基硅烷[(3-aminopropyl)trimethoxysilane],但也可以使用另一种类的氨基硅烷。投入氨基硅烷之后,持续地注入了氮,并搅拌了24小时。借助氨基硅烷和介孔FeOx结构体的反应,在介孔FeOx结构体的表面上形成胺基。此时,为了防止因无水甲苯均蒸发而介孔FeOx结构体成块状,需要适当地调节氮的供给量。
最终,利用甲苯来洗涤2~3次之后,在50℃真空烘箱中干燥8小时来完成了带有胺基的介孔FeOx结构体。图1是根据本发明一实施例制备的带有胺基的介孔FeOx结构体的照片,通过图1可以确认带有浅古铜色的胺基的介孔FeOx结构体的粉末状。
<实施例2:带有胺基的FeOx的物质特性>
通过XRD分析及TEM分析确认了通过实施例1而制备的带有胺基的介孔FeOx结构体的物质特性。参照图2的XRD图表,可以确认FeOx峰和胺基峰明确,通过图3的TEM照片可以确认介孔结构的带有胺基的FeOx。
<实施例3:砷吸附实验>
实施了通过实施例1而制备的带有胺基的介孔FeOx结构体的砷吸附实验。实验方法及实验结果如下。
在50ml特氟龙材质的圆锥管(conical tube)以10mg/L的浓度分别准备了铜、镉、铅及砷水溶液。然后,利用离子层析仪(IC,ion chromatography)测定各个重金属水溶液的浓度之后,确认了是否符合实验浓度。
接着,在各个重金属水溶液中注入了通过实施例1而制备的带有胺基的介孔FeOx结构体0.05g。搅拌6小时之后测定了重金属吸附性能。此时,为了进行比较,在相同的条件下,在重金属水溶液中还注入不带有胺基的介孔FeOx结构体之后进行了搅拌。实施例1的带有胺基的介孔FeOx结构体(Amine-FeOx)及不带有胺基的介孔FeOx结构体(FeOx)的重金属吸附性能如下表1所示。
(表1)
带有胺基的介孔FeOx结构体的重金属吸附性能
参照(表1),就作为阳离子重金属的铜、镉及铅而言,可以确认全然未进行吸附,就作为负离子重金属的砷而言,可知,借助实施例1的带有胺基的介孔FeOx结构体(Amine-FeOx)几乎被去除(10mg/L→0.382mg/L)。
Claims (7)
1.一种带有胺基的介孔FeOx结构体的制备方法,其特征在于,包括如下步骤:
第一步骤,混合氯化亚铁水溶液和表面活性剂;
第二步骤,在氯化亚铁水溶液和表面活性剂的水溶液中混合过氧化氢;
第三步骤,对上述第二步骤的混合液进行离心分离之后,干燥固体物质来制备粉末状的介孔FeOx结构体;以及
第四步骤,将上述介孔FeOx结构体分散于无水甲苯之后,注入氨基硅烷来使氨基硅烷和介孔FeOx结构体进行反应,从而在介孔FeOx结构体的表面带有胺基。
2.根据权利要求1所述的带有胺基的介孔FeOx结构体的制备方法,其特征在于,上述表面活性剂为十二烷基硫酸钠。
3.根据权利要求1所述的带有胺基的介孔FeOx结构体的制备方法,其特征在于,使上述氨基硅烷和介孔FeOx结构体以1:1的质量比进行反应。
4.根据权利要求1所述的带有胺基的介孔FeOx结构体的制备方法,其特征在于,将上述介孔FeOx结构体分散于无水甲苯时,每1g的介孔FeOx结构体中混合20ml~40ml的无水甲苯。
5.根据权利要求1所述的带有胺基的介孔FeOx结构体的制备方法,其特征在于,上述氨基硅烷为3-氨基丙基三甲氧基硅烷。
6.根据权利要求1所述的带有胺基的介孔FeOx结构体的制备方法,其特征在于,在将上述第四步骤的上述介孔FeOx结构体分散于无水甲苯的过程以及注入氨基硅烷的过程中,注入氮来防止去除氧的同时防止无水甲苯蒸发的现象。
7.一种带有胺基的介孔FeOx结构体,其特征在于,通过权利要求1的制备方法而制备。
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