Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone
Mesoporous silica known as M41 S family was discovered as the first ordered mesoporous materials. Among them, MCM-48 a mesoporous cubic system with a highly interwoven and branched pore structure is a potential material in catalyst applications. MCM-48 mesoporous molecular sieves can be conveniently...
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| Format: | Undergraduates Project Papers |
| Language: | English |
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2012
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| Online Access: | http://umpir.ump.edu.my/id/eprint/7842/ http://umpir.ump.edu.my/id/eprint/7842/1/SHAFIZAH_BINTI_SA%27ADON.PDF |
| _version_ | 1848818102207250432 |
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| author | Shafizah , Sa'adon |
| author_facet | Shafizah , Sa'adon |
| author_sort | Shafizah , Sa'adon |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Mesoporous silica known as M41 S family was discovered as the first ordered mesoporous materials. Among them, MCM-48 a mesoporous cubic system with a highly interwoven and branched pore structure is a potential material in catalyst applications. MCM-48 mesoporous molecular sieves can be conveniently prepared by using rice-husk ash (RHA), an agriculture waste of silica (Si0 2 ) sources. In this research, niobium-doped silica molecular sieves were hydrothermally synthesized utilizing niobiuth ethoxide as the sources of niobium. This niobium species has been introduced into a pure silica MCM-48 without destroying or disturbing its framework structure. The microstructure of mesoporous materials was characterized by a variety of physico-chemical methods such as X-Ray diffraction (XRD), UV-Vis diffuse reflectance, BET Surface Area Analysis, Thermogravimetry Analysis (TGA), Fourier-Transformed Infrared Spectroscopy (FT1R) and Gas Chromatography-Flame Ionized Detector (GC-FID) techniques. Chalcone has been prepared by an aldol condensation between a benzaldehyde and an acetophenone. The percentage of conversion of acetophenone was calculated by using area of peak obtained from GC analysis. The percentage of conversion of the uncalcined MCM-48, calcined MCM-48, 1% Nb-doped MCM-48 and 2% Nb-doped MCM-48 were 21.13%, 27.60%, 34.26% and 39.13% respectively. The niobium-doped MCM-48 has catalyzed the selective chalcone compound and the catalytic activities were ascribed to the strong acidity generated by the presences of the niobium species in MCM-48. It has been proven that the increase in amount of niobium loading in the samples has increased the performance of the catalysts.
Keyword: Niobium ethoxide; MCM-48; Lewis acidity; anti-cancer; Chalcone; |
| first_indexed | 2025-11-15T01:32:19Z |
| format | Undergraduates Project Papers |
| id | ump-7842 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:32:19Z |
| publishDate | 2012 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-78422021-06-02T03:07:26Z http://umpir.ump.edu.my/id/eprint/7842/ Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone Shafizah , Sa'adon QD Chemistry Mesoporous silica known as M41 S family was discovered as the first ordered mesoporous materials. Among them, MCM-48 a mesoporous cubic system with a highly interwoven and branched pore structure is a potential material in catalyst applications. MCM-48 mesoporous molecular sieves can be conveniently prepared by using rice-husk ash (RHA), an agriculture waste of silica (Si0 2 ) sources. In this research, niobium-doped silica molecular sieves were hydrothermally synthesized utilizing niobiuth ethoxide as the sources of niobium. This niobium species has been introduced into a pure silica MCM-48 without destroying or disturbing its framework structure. The microstructure of mesoporous materials was characterized by a variety of physico-chemical methods such as X-Ray diffraction (XRD), UV-Vis diffuse reflectance, BET Surface Area Analysis, Thermogravimetry Analysis (TGA), Fourier-Transformed Infrared Spectroscopy (FT1R) and Gas Chromatography-Flame Ionized Detector (GC-FID) techniques. Chalcone has been prepared by an aldol condensation between a benzaldehyde and an acetophenone. The percentage of conversion of acetophenone was calculated by using area of peak obtained from GC analysis. The percentage of conversion of the uncalcined MCM-48, calcined MCM-48, 1% Nb-doped MCM-48 and 2% Nb-doped MCM-48 were 21.13%, 27.60%, 34.26% and 39.13% respectively. The niobium-doped MCM-48 has catalyzed the selective chalcone compound and the catalytic activities were ascribed to the strong acidity generated by the presences of the niobium species in MCM-48. It has been proven that the increase in amount of niobium loading in the samples has increased the performance of the catalysts. Keyword: Niobium ethoxide; MCM-48; Lewis acidity; anti-cancer; Chalcone; 2012 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/7842/1/SHAFIZAH_BINTI_SA%27ADON.PDF Shafizah , Sa'adon (2012) Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone. Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang. |
| spellingShingle | QD Chemistry Shafizah , Sa'adon Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| title | Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| title_full | Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| title_fullStr | Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| title_full_unstemmed | Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| title_short | Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| title_sort | synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone |
| topic | QD Chemistry |
| url | http://umpir.ump.edu.my/id/eprint/7842/ http://umpir.ump.edu.my/id/eprint/7842/1/SHAFIZAH_BINTI_SA%27ADON.PDF |