ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]-
Magnetic adsorbent of Fe3O4/SiO 2 NPCS modified with thiol (-SH) group for [AuCl 4 ] - ion adsorption was synthesized. Fe3O4 particles were prepared by co precipitation method under mechanical stirring, then further coated with SiO 2 by acid hydrolyzing of Na 2SiO3 under N 2 bubbling. S...
| Main Authors: | , |
|---|---|
| Format: | Thesis |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
|
| Subjects: |
| _version_ | 1797036042007609344 |
|---|---|
| author | , YUSRAN , Dr. Roto, M.Eng. |
| author_facet | , YUSRAN , Dr. Roto, M.Eng. |
| author_sort | , YUSRAN |
| collection | UGM |
| description | Magnetic adsorbent of Fe3O4/SiO
2 NPCS modified with thiol (-SH) group for
[AuCl
4
]
-
ion adsorption was synthesized. Fe3O4
particles were prepared by co
precipitation method under mechanical stirring, then further coated with SiO
2
by
acid hydrolyzing of Na
2SiO3 under N
2
bubbling. SiO
2
coating functions to avoid
the agglomeration of Fe3O4
particles by forming Fe3O4/SiO
2
in nanoscale and to
protect the Fe
3O4
core for being dissolved in acid solution. The coated particle
then was modified with thiol group (-SH) using 3-MPTMS through silanization
reaction. FT-IR, XRD, TEM and EDS instruments were employed to characterize
the resulted adsorbent.
The results showed that SiO2
coated the Fe
3O4
core yielding magnetic core shell in
10-20 nm scale. Thiol group signed on the surface of core shell based on Infrared
and EDX analysis. The maximum uptake towards [AuCl
4
]
-
ion was reached at pH
3 which followed Langmuir isotherm model with maximum adsorption capacity
( ) of 114.81 mg/g and adsorption free energy (�G�) of 24.78 kJ/mol. Desorption
agent of 8 mg of thiourea in 100 ml HCl 1M enabled to desorbs 43 mg/g of
adsorbed [AuCl
4
]
-
ion when the adsorbed concentration was 68.35 mg/g. Both
adsorption and desorption were assumed as chemical bonding through complex
coordination bonding formation based on Pearson�s hard-soft acid-base principles. |
| first_indexed | 2024-03-13T23:39:53Z |
| format | Thesis |
| id | oai:generic.eprints.org:133632 |
| institution | Universiti Gadjah Mada |
| last_indexed | 2024-03-13T23:39:53Z |
| publishDate | 2014 |
| publisher | [Yogyakarta] : Universitas Gadjah Mada |
| record_format | dspace |
| spelling | oai:generic.eprints.org:1336322016-03-04T08:18:48Z https://repository.ugm.ac.id/133632/ ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- , YUSRAN , Dr. Roto, M.Eng. ETD Magnetic adsorbent of Fe3O4/SiO 2 NPCS modified with thiol (-SH) group for [AuCl 4 ] - ion adsorption was synthesized. Fe3O4 particles were prepared by co precipitation method under mechanical stirring, then further coated with SiO 2 by acid hydrolyzing of Na 2SiO3 under N 2 bubbling. SiO 2 coating functions to avoid the agglomeration of Fe3O4 particles by forming Fe3O4/SiO 2 in nanoscale and to protect the Fe 3O4 core for being dissolved in acid solution. The coated particle then was modified with thiol group (-SH) using 3-MPTMS through silanization reaction. FT-IR, XRD, TEM and EDS instruments were employed to characterize the resulted adsorbent. The results showed that SiO2 coated the Fe 3O4 core yielding magnetic core shell in 10-20 nm scale. Thiol group signed on the surface of core shell based on Infrared and EDX analysis. The maximum uptake towards [AuCl 4 ] - ion was reached at pH 3 which followed Langmuir isotherm model with maximum adsorption capacity ( ) of 114.81 mg/g and adsorption free energy (�G�) of 24.78 kJ/mol. Desorption agent of 8 mg of thiourea in 100 ml HCl 1M enabled to desorbs 43 mg/g of adsorbed [AuCl 4 ] - ion when the adsorbed concentration was 68.35 mg/g. Both adsorption and desorption were assumed as chemical bonding through complex coordination bonding formation based on Pearson�s hard-soft acid-base principles. [Yogyakarta] : Universitas Gadjah Mada 2014 Thesis NonPeerReviewed , YUSRAN and , Dr. Roto, M.Eng. (2014) ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]-. UNSPECIFIED thesis, UNSPECIFIED. http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74361 |
| spellingShingle | ETD , YUSRAN , Dr. Roto, M.Eng. ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| title | ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| title_full | ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| title_fullStr | ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| title_full_unstemmed | ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| title_short | ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| title_sort | adsorben magnetik fe3o4 sio2 npcs termodifikasi gugus tiol dan kajian adsorpsinya terhadap ion aucl4 |
| topic | ETD |
| work_keys_str_mv | AT yusran adsorbenmagnetikfe3o4sio2npcstermodifikasigugustioldankajianadsorpsinyaterhadapionaucl4 AT drrotomeng adsorbenmagnetikfe3o4sio2npcstermodifikasigugustioldankajianadsorpsinyaterhadapionaucl4 |