Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion
In the current study, we have synthesized calcium hydroxyapatite (CaHAP) from different phosphorus sources namely, NH4H2PO4 and H3PO4. The structure of CaHAP was confirmed by XRD, FT-IR, and Raman characterization methods. The CaHAP was further modified with various anions such as WO42–, SO42–, and...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/99142 http://hdl.handle.net/10220/17232 |
| _version_ | 1811677579832197120 |
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| author | Ramesh, Kanaparthi Goh, Eileen Yi Ling Gwie, C. G. White, Timothy John Borgna, Armando |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Ramesh, Kanaparthi Goh, Eileen Yi Ling Gwie, C. G. White, Timothy John Borgna, Armando |
| author_sort | Ramesh, Kanaparthi |
| collection | NTU |
| description | In the current study, we have synthesized calcium hydroxyapatite (CaHAP) from different phosphorus sources namely, NH4H2PO4 and H3PO4. The structure of CaHAP was confirmed by XRD, FT-IR, and Raman characterization methods. The CaHAP was further modified with various anions such as WO42–, SO42–, and PO43– with fixed content of 10 wt %. To understand the textural and structural properties, these samples were thoroughly characterized by N2 physisorption, X-ray diffraction, Fourier transform infrared, Raman and thermogravimetry–differential thermal analysis methods. Ethanol adsorption at various temperatures was studied in detail using diffuse reflectance Fourier transform spectroscopic to unravel the formation and stability of surface species and the interaction of ethanol with CaHAP. The temperature programmed desorption of ethanol (ethanol-TPD) was performed to understand the stability, surface reactivity, and product distribution. The catalytic activity of the above catalysts was tested in ethanol conversion over a temperature range of 300–450 °C. |
| first_indexed | 2024-10-01T02:39:37Z |
| format | Journal Article |
| id | ntu-10356/99142 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:39:37Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/991422020-06-01T10:26:32Z Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion Ramesh, Kanaparthi Goh, Eileen Yi Ling Gwie, C. G. White, Timothy John Borgna, Armando School of Materials Science & Engineering In the current study, we have synthesized calcium hydroxyapatite (CaHAP) from different phosphorus sources namely, NH4H2PO4 and H3PO4. The structure of CaHAP was confirmed by XRD, FT-IR, and Raman characterization methods. The CaHAP was further modified with various anions such as WO42–, SO42–, and PO43– with fixed content of 10 wt %. To understand the textural and structural properties, these samples were thoroughly characterized by N2 physisorption, X-ray diffraction, Fourier transform infrared, Raman and thermogravimetry–differential thermal analysis methods. Ethanol adsorption at various temperatures was studied in detail using diffuse reflectance Fourier transform spectroscopic to unravel the formation and stability of surface species and the interaction of ethanol with CaHAP. The temperature programmed desorption of ethanol (ethanol-TPD) was performed to understand the stability, surface reactivity, and product distribution. The catalytic activity of the above catalysts was tested in ethanol conversion over a temperature range of 300–450 °C. 2013-11-05T03:56:12Z 2019-12-06T20:03:50Z 2013-11-05T03:56:12Z 2019-12-06T20:03:50Z 2012 2012 Journal Article Ramesh, K., Goh, E. Y. L., Gwie, C. G., White, T. J., & Borgna, A. (2012). Structure and Surface Reactivity of WO42– , SO42– , PO43– Modified Ca-Hydroxyapatite Catalysts and Their Activity in Ethanol Conversion . The Journal of Physical Chemistry C, 116(35), 18736-18745. https://hdl.handle.net/10356/99142 http://hdl.handle.net/10220/17232 10.1021/jp304187v en The journal of physical chemistry C |
| spellingShingle | Ramesh, Kanaparthi Goh, Eileen Yi Ling Gwie, C. G. White, Timothy John Borgna, Armando Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion |
| title | Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion |
| title_full | Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion |
| title_fullStr | Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion |
| title_full_unstemmed | Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion |
| title_short | Structure and surface reactivity of WO42– , SO42– , PO43– modified Ca-hydroxyapatite catalysts and their activity in ethanol conversion |
| title_sort | structure and surface reactivity of wo42 so42 po43 modified ca hydroxyapatite catalysts and their activity in ethanol conversion |
| url | https://hdl.handle.net/10356/99142 http://hdl.handle.net/10220/17232 |
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