ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]-
| Main Authors: | , YUSRAN, , Dr. Roto, M.Eng. |
|---|---|
| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/133632/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74361 |
| ctrlnum |
133632 |
|---|---|
| fullrecord |
<?xml version="1.0"?>
<dc schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><relation>https://repository.ugm.ac.id/133632/</relation><title>ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]-</title><creator>, YUSRAN</creator><creator>, Dr. Roto, M.Eng.</creator><subject>ETD</subject><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.</description><publisher>[Yogyakarta] : Universitas Gadjah Mada</publisher><date>2014</date><type>Thesis:Thesis</type><type>PeerReview:NonPeerReviewed</type><identifier> , YUSRAN and , Dr. Roto, M.Eng. (2014) ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]-. UNSPECIFIED thesis, UNSPECIFIED. </identifier><relation>http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74361</relation><recordID>133632</recordID></dc>
|
| format |
Thesis:Thesis Thesis PeerReview:NonPeerReviewed PeerReview |
| author |
, YUSRAN , Dr. Roto, M.Eng. |
| title |
ADSORBEN MAGNETIK Fe3O4/SiO2 NPCS TERMODIFIKASI GUGUS TIOL DAN KAJIAN ADSORPSINYA TERHADAP ION [AuCl4]- |
| publisher |
[Yogyakarta] : Universitas Gadjah Mada |
| publishDate |
2014 |
| topic |
ETD |
| url |
https://repository.ugm.ac.id/133632/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74361 |
| contents |
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. |
| id |
IOS2744.133632 |
| institution |
Universitas Gadjah Mada |
| institution_id |
19 |
| institution_type |
library:university library |
| library |
Perpustakaan Pusat Universitas Gadjah Mada |
| library_id |
488 |
| collection |
UGM Repository |
| repository_id |
2744 |
| subject_area |
Karya Umum |
| city |
SLEMAN |
| province |
DAERAH ISTIMEWA YOGYAKARTA |
| repoId |
IOS2744 |
| first_indexed |
2016-09-14T18:34:49Z |
| last_indexed |
2016-09-22T21:48:57Z |
| recordtype |
dc |
| _version_ |
1765816672601505792 |
| score |
17.538404 |