Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization
Preparation of polyoxometalate compound of (NH4)6(β-P2W18O62)nH2O supported with silica derived from the hydrolysis of tetraethyl orthosilicate by sol-gel method has been conducted. The compound was synthesized and characterized using FT-IR spectrophotometer, crystallinity using XRD analysis and the...
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| Format: | Article |
| Language: | English |
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Magister Program of Material Sciences, Graduate School of Universitas Sriwijaya
2017-06-01
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| Series: | Science and Technology Indonesia |
| Online Access: | http://sciencetechindonesia.com/index.php/jsti/article/view/8 |
| _version_ | 1797285746383519744 |
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| author | Osin Restinawaty Tambunan Risfidian Mohadi |
| author_facet | Osin Restinawaty Tambunan Risfidian Mohadi |
| author_sort | Osin Restinawaty Tambunan |
| collection | DOAJ |
| description | Preparation of polyoxometalate compound of (NH4)6(β-P2W18O62)nH2O supported with silica derived from the hydrolysis of tetraethyl orthosilicate by sol-gel method has been conducted. The compound was synthesized and characterized using FT-IR spectrophotometer, crystallinity using XRD analysis and the determination of acidity via quantitatively and qualitatively. Qualitative analysis was performed using ammonia and pyridine adsorption and quantitative analysis using potentiometric titration. FT-IR spectrum of (NH4)6(β-P2W18O62)nH2O appeared in wavenumber 786.96 cm-1 (W-OC-W), 918.12 cm-1 (W-Oe-W), 964.41 cm-1 (W=O), 1087.85 cm-1 (P-O), 3572.17 cm-1 (O-H), 1404.18 cm-1 (N-H) reinforced with wavenumber 1612.49 cm-1 with show vibration NH dari NH+, and to (NH4)6(β-P2W18O62)nH2O/SiO2 appears in wavenumbers 794.67 cm-1 (W-Oc-W), 918.12 cm-1 (W-Oe-W), 1049.28 cm-1 (W=O), 1087.85 cm-1 (P-O), 3564.15 cm-1 (O-H), 470.63 cm-1 (Si-O). Diffraction pattern of (NH4)6(β-P2W18O62)nH2O and (NH4)6(β-P2W18O62)nH2O/SiO2 compound show high crystanillity. The acidic properties showed (NH4)6(β-P2W18O62)nH2O/SiO2 more acidic than (NH4)6(β-P2W18O62)nH2O. Analysis of the effect of temperature on the stability of the compounds polyoxometalate (NH4)6(β-P2W18O62)nH2O/SiO2 show that the temperature of 600ºC the shift in wavenumbers of the compounds caused by vibration W=O, W-OC-W, W-Oe-W has been lost. This shows that at a temperatures of 600ºC on heating can cause changes in the structure of polyoxometalate (NH4)6(β-P2W18O62)nH2O/SiO2.
Keywords : (NH4)6(β-P2W18O62).nH2O, Polyoxometalate, SiO2 |
| first_indexed | 2024-03-07T18:07:42Z |
| format | Article |
| id | doaj.art-9c1d215a0a7f4a1284d2acbc30bb344b |
| institution | Directory Open Access Journal |
| issn | 2580-4405 2580-4391 |
| language | English |
| last_indexed | 2024-03-07T18:07:42Z |
| publishDate | 2017-06-01 |
| publisher | Magister Program of Material Sciences, Graduate School of Universitas Sriwijaya |
| record_format | Article |
| series | Science and Technology Indonesia |
| spelling | doaj.art-9c1d215a0a7f4a1284d2acbc30bb344b2024-03-02T08:27:27ZengMagister Program of Material Sciences, Graduate School of Universitas SriwijayaScience and Technology Indonesia2580-44052580-43912017-06-01211810.26554/sti.2017.2.1.1-88Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterizationOsin Restinawaty TambunanRisfidian MohadiPreparation of polyoxometalate compound of (NH4)6(β-P2W18O62)nH2O supported with silica derived from the hydrolysis of tetraethyl orthosilicate by sol-gel method has been conducted. The compound was synthesized and characterized using FT-IR spectrophotometer, crystallinity using XRD analysis and the determination of acidity via quantitatively and qualitatively. Qualitative analysis was performed using ammonia and pyridine adsorption and quantitative analysis using potentiometric titration. FT-IR spectrum of (NH4)6(β-P2W18O62)nH2O appeared in wavenumber 786.96 cm-1 (W-OC-W), 918.12 cm-1 (W-Oe-W), 964.41 cm-1 (W=O), 1087.85 cm-1 (P-O), 3572.17 cm-1 (O-H), 1404.18 cm-1 (N-H) reinforced with wavenumber 1612.49 cm-1 with show vibration NH dari NH+, and to (NH4)6(β-P2W18O62)nH2O/SiO2 appears in wavenumbers 794.67 cm-1 (W-Oc-W), 918.12 cm-1 (W-Oe-W), 1049.28 cm-1 (W=O), 1087.85 cm-1 (P-O), 3564.15 cm-1 (O-H), 470.63 cm-1 (Si-O). Diffraction pattern of (NH4)6(β-P2W18O62)nH2O and (NH4)6(β-P2W18O62)nH2O/SiO2 compound show high crystanillity. The acidic properties showed (NH4)6(β-P2W18O62)nH2O/SiO2 more acidic than (NH4)6(β-P2W18O62)nH2O. Analysis of the effect of temperature on the stability of the compounds polyoxometalate (NH4)6(β-P2W18O62)nH2O/SiO2 show that the temperature of 600ºC the shift in wavenumbers of the compounds caused by vibration W=O, W-OC-W, W-Oe-W has been lost. This shows that at a temperatures of 600ºC on heating can cause changes in the structure of polyoxometalate (NH4)6(β-P2W18O62)nH2O/SiO2. Keywords : (NH4)6(β-P2W18O62).nH2O, Polyoxometalate, SiO2http://sciencetechindonesia.com/index.php/jsti/article/view/8 |
| spellingShingle | Osin Restinawaty Tambunan Risfidian Mohadi Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization Science and Technology Indonesia |
| title | Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization |
| title_full | Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization |
| title_fullStr | Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization |
| title_full_unstemmed | Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization |
| title_short | Preparation of polyoxometalate compound (NH4)6(β-P2W18O62)/SiO2 by sol-gel method and its characterization |
| title_sort | preparation of polyoxometalate compound nh4 6 β p2w18o62 sio2 by sol gel method and its characterization |
| url | http://sciencetechindonesia.com/index.php/jsti/article/view/8 |
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