Ordered mesoporous silica with hexagonal structure, MCM-41 was synthesized under basic media usin... more Ordered mesoporous silica with hexagonal structure, MCM-41 was synthesized under basic media using Ludox as the silica source and cetyltrimethylammonium bromide as the organic surfactant template. Organic-functionalized MPTS-MCM-41 were prepared by grafting method using 3mercaptopropyltrimethoxysilane. The samples were characterized using FTIR, FESEM and XRD to obtain more detailed structural insights of MCM-41. The synthesized MPTS-MCM-41 were tested for adsorption of Pb(II) and Cr(III) ions in aqueous solution. Adsorption studies were analyzed using atomic absorption spectroscopy (AAS). The effect of adsorbent dose and contact time on the adsorption of Pb(II) and Cr(III) ions from aqueous solution have been investigated. MPTS-MCM-41 was found to be effective adsorbent for metal cation than parent MCM-41 with higher affinity for Pb(II) than Cr(III) from single solution. The highest percentage removal of Pb(II) was achieved at 94.59% using 0.4 g MPTS-MCM-41 at 4 hours contact time w...
The Malaysian Journal of Analytical Sciences, 2012
Mesoporous material MCM-41 with uniform hexagonally ordered pores in range of 2-10 nm was synthes... more Mesoporous material MCM-41 with uniform hexagonally ordered pores in range of 2-10 nm was synthesized through hydrothermal method. The synthesis started from highly pure silica source known as Ludox which act as an active source of silica in the presence of organic surfactant (CTABr) as structure-directing agent. MCM-41 has been functionalized with the organic group known as 3-aminopropyltriethoxysilane (APTES), 3-mercaptopropyltrimethoxysilane (MPTMS), and chloropropyltriethoxysilane (CPTES) by co-condensation method in order to enhance the surface hydrophobicity of MCM-41. The increasing hydrophobicity will lead to efficient reaction specifically for organic reaction in organic solvent. The resulting materials were characterized with various techniques which are PXRD, FTIR, NMR, Elemental Analysis and AAS. The formation of uniform hexagonal framework of synthesized materials was shown in PXRD result. The functionalized groups of modified MCM-41 can be characteried via FTIR and 13 ...
2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER), 2012
Thiourea complex encapsulated into functionalized-MCM41 was carried out in four stages. First sta... more Thiourea complex encapsulated into functionalized-MCM41 was carried out in four stages. First stage is synthesized the MCM41 framework by using Ludox as silica source and Cetyltrimethylammonium bromide as surfactant. Second stage is modification of surface MCM-41 with organic group which is 3-aminoprophyltriethoxysilane. Next stage is encapsulation of 2-thiouracil into functionalized-MCM41 and then was incorporated with copper acetate monohydrate to produce thiourea complex. The Cu(OAC)2-Thio-APS-MCM41 catalyst was characterized by X-ray diffraction (XRD), nitrogen desorption-adsorption isotherm, single-point BET, Fourier Transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). The catalytic potential of Cu(OAC)2-Thio-APS-MCM41 catalyst was investigated in oxidation of cyclohexene with tert-butylhydroperoxide. The oxidation reaction was monitored by gas chromatography. It was observed that Cu(OAC)2-Thio-APS-MCM41 catalyst displayed good properties of catalyst for oxidation reaction by giving high percentage conversion of cyclohexene and selectivity of 2-cyclohexen-1one. The catalytic activity was compared with the reaction without catalyst.
Ordered mesoporous silica with hexagonal structure, MCM-41 was synthesized under basic media usin... more Ordered mesoporous silica with hexagonal structure, MCM-41 was synthesized under basic media using Ludox as the silica source and cetyltrimethylammonium bromide as the organic surfactant template. Organic-functionalized MPTS-MCM-41 were prepared by grafting method using 3mercaptopropyltrimethoxysilane. The samples were characterized using FTIR, FESEM and XRD to obtain more detailed structural insights of MCM-41. The synthesized MPTS-MCM-41 were tested for adsorption of Pb(II) and Cr(III) ions in aqueous solution. Adsorption studies were analyzed using atomic absorption spectroscopy (AAS). The effect of adsorbent dose and contact time on the adsorption of Pb(II) and Cr(III) ions from aqueous solution have been investigated. MPTS-MCM-41 was found to be effective adsorbent for metal cation than parent MCM-41 with higher affinity for Pb(II) than Cr(III) from single solution. The highest percentage removal of Pb(II) was achieved at 94.59% using 0.4 g MPTS-MCM-41 at 4 hours contact time w...
The Malaysian Journal of Analytical Sciences, 2012
Mesoporous material MCM-41 with uniform hexagonally ordered pores in range of 2-10 nm was synthes... more Mesoporous material MCM-41 with uniform hexagonally ordered pores in range of 2-10 nm was synthesized through hydrothermal method. The synthesis started from highly pure silica source known as Ludox which act as an active source of silica in the presence of organic surfactant (CTABr) as structure-directing agent. MCM-41 has been functionalized with the organic group known as 3-aminopropyltriethoxysilane (APTES), 3-mercaptopropyltrimethoxysilane (MPTMS), and chloropropyltriethoxysilane (CPTES) by co-condensation method in order to enhance the surface hydrophobicity of MCM-41. The increasing hydrophobicity will lead to efficient reaction specifically for organic reaction in organic solvent. The resulting materials were characterized with various techniques which are PXRD, FTIR, NMR, Elemental Analysis and AAS. The formation of uniform hexagonal framework of synthesized materials was shown in PXRD result. The functionalized groups of modified MCM-41 can be characteried via FTIR and 13 ...
2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER), 2012
Thiourea complex encapsulated into functionalized-MCM41 was carried out in four stages. First sta... more Thiourea complex encapsulated into functionalized-MCM41 was carried out in four stages. First stage is synthesized the MCM41 framework by using Ludox as silica source and Cetyltrimethylammonium bromide as surfactant. Second stage is modification of surface MCM-41 with organic group which is 3-aminoprophyltriethoxysilane. Next stage is encapsulation of 2-thiouracil into functionalized-MCM41 and then was incorporated with copper acetate monohydrate to produce thiourea complex. The Cu(OAC)2-Thio-APS-MCM41 catalyst was characterized by X-ray diffraction (XRD), nitrogen desorption-adsorption isotherm, single-point BET, Fourier Transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). The catalytic potential of Cu(OAC)2-Thio-APS-MCM41 catalyst was investigated in oxidation of cyclohexene with tert-butylhydroperoxide. The oxidation reaction was monitored by gas chromatography. It was observed that Cu(OAC)2-Thio-APS-MCM41 catalyst displayed good properties of catalyst for oxidation reaction by giving high percentage conversion of cyclohexene and selectivity of 2-cyclohexen-1one. The catalytic activity was compared with the reaction without catalyst.
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