Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone

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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Main Author: Shafizah , Sa'adon
Format: Undergraduates Project Papers
Language:English
Published: 2012
Subjects:
QD Chemistry
Online Access:http://umpir.ump.edu.my/id/eprint/7842/
http://umpir.ump.edu.my/id/eprint/7842/
http://umpir.ump.edu.my/id/eprint/7842/1/SHAFIZAH_BINTI_SA%27ADON.PDF
id ump-7842
recordtype eprints
spelling ump-78422015-03-03T09:38:23Z 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. http://iportal.ump.edu.my/lib/item?id=chamo:73303&theme=UMP2
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic QD Chemistry
spellingShingle QD Chemistry
Shafizah , Sa'adon
Synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone
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;
format Undergraduates Project Papers
author Shafizah , Sa'adon
author_facet Shafizah , Sa'adon
author_sort Shafizah , Sa'adon
title 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_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_sort synthesis of niobium-doped mcm-48 molecular sieves and its catalytic performance for production of chalcone
publishDate 2012
url http://umpir.ump.edu.my/id/eprint/7842/
http://umpir.ump.edu.my/id/eprint/7842/
http://umpir.ump.edu.my/id/eprint/7842/1/SHAFIZAH_BINTI_SA%27ADON.PDF
first_indexed 2023-09-18T22:04:54Z
last_indexed 2023-09-18T22:04:54Z
_version_ 1777414642368249856

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