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Simplified search suggestions : Mazlina Musa

Ionothermal synthesis of metal aluminophosphates

Abstract

The aim of this thesis was to synthesise CoAPO-34 and FeAPO-34 using ionothermal synthesis in the presence of organic amines. Using this method provides an alternative route to prepare such materials under low pressure instead of the higher pressure associated with hydrothermal or solvothermal synthesis. Both materials have chabazite (CHA) topology and they are known to act as catalysts. CoAPO-34 was ionothermally prepared using 1-ethyl-3-methylimidazolium bromide (EMIMBr) in presence of 1, 6-hexadiamine (HDA). This study has found that when the synthesis was carried out without HDA, AIPO-11 was preferentially obtained instead of CoAPO-34. Broad line signals which appear between 2000 to 5000 ppm in both spin-echo 31 P NMR spectra of as-synthesised and calcined CoAPO-34 confirm that the C02+ ions have been successfully incorporated within the framework of the material. FeAPO-34 was synthesised under ionothermal conditions using 1-ethyl-3-methylimidazolium chloride in the presence of eth.....

Thesis Published 2013 3792 hits Available

Ionothermal synthesis and characterization of CoAPO-34 molecular sieve

Mazlina Musa

Abstract

The cobalt-doped aluminophosphate molecular sieve, CoAPO-34 (with the chabazite-type topology) was prepared under ionothermal conditions using 1-ethyl-3-methylimidazolium bromide (EMIMBr) ionic liquid in presence of 1,6-hexanediamine (HDA). The HDA is not incorporated in CoAPO-34, but is required to mediate the availability of Co2þ during the synthesis. The material was characterized using powder Xray diffraction (PXRD), thermogravimetric analysis (TGA) and solid-state NMR spectroscopy. Wideline 31P NMR spectroscopy showed broad signals (~5000e10000 ppm wide), confirming that paramagnetic cobalt ions are successfully incorporated within the framework of the materials...

Article Published 2017 686 hits Limited

Synthesis and characterization of novel 4-aminobenzoate interleaved with zinc layered hydroxide for potential sunscreen application

Mazlina Musa

Abstract

4-aminobenzoic acid (4-AB) interleaved with zinc layered hydroxide (ZAB) was successfully synthesized from 4-AB and zinc oxide (ZnO) by using co-precipitation method. The PXRD pattern of ZAB with a basal spacing of 23.2 Å has confirmed that 4-AB interleaved into zinc layered hydroxide (ZLH) inorganic interlayer. The interleaved compound was also verified with the presence of COO– and aromatic N–C groups observed at 1518 cm−1 and 1174 cm−1, respectively, in the FTIR spectrum. The results were supported by the presence of 18.7% carbon composition in the ZAB material obtained from TGA analysis. Morphological studies showed that ZAB material is a flake-like shape with different sizes. Further characterizations of the resulting compounds were also studied by using BET/BJH, ICP and CHNS analyses...

Article Published 2019 937 hits Available

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