Pusat Pengajian Sains Kimia - Tesis
Browse
Recent Submissions
- PublicationPreparation Of Pani/Go/Mof-Fe3o4 Nanocomposite Via Sol-Gel Method For Removal Methyl Orange And Naproxen Sodium(2025-06)Hussain, EjazDischarging industrial dyes and emerging contaminants (ECs) into water resources has become a severe ecological and public health hazard, evidenced by measurable contaminant levels in wastewater and their adverse impacts on aquatic life and human health. In this study, a simple synthesis method (in-situ polymerization) has been employed to synthesize PANI/GO/MOF-Fe3O4 nanocomposite for the adsorption of industrial dye: methyl orange (MO) and an emerging contaminant, naproxen sodium (NAP), from the wastewater.
- PublicationElectrofabrication Of Zinc Oxide Photocatalyst In The Presence Of Bio-Waste Extracts And Deep Eutectic Solvent For Degradation Of 2,4-Dichlorophenol(2025-07)Abdul Mutalib, Aunie AfifahChlorophenols such as 2,4-dichlorophenol (2,4-DCP) are common hazardous pollutants found in industrial wastewater, necessitating the development of green and effective photocatalytic methods for their removal. This study proposes a sustainable ZnO electrosynthesis using bio-waste extracts and deep eutectic solvent (DES) as a green electrolyte.
- PublicationBioassay-Guided Isolation, Characterisation And Molecular Docking Study Of Acetylcholinesterase And Butyrylcholinesterase Inhibitors From Horsfieldia Polyspherula And Horsfieldia Tomentosa(2025-01)Mohammed, IdrissAlzheimer’s disease (ad) is a neurodegenerative disorder associated with ageing. It is characterised by beta-amyloid deposition, aggregation of neurofibrillary tangles, oxidative stress and decreased acetylcholine levels. Horsfieldia species, known for their medicinal properties, have yielded secondary metabolites with various health benefits. This research highlighted the emergence of various secondary metabolites coupled with a considerable amount of phenolic and flavonoid constituents in the extracts of h. Polyspherula and h. Tomentosa. A total of seventeen unique compounds were isolated, ten of which were from the ethyl acetate (etoac) extract of the bark of h. Polyspherula, while another seven from the etoac extract of h. Tomentosa fruit. Hence, the isolated compounds from h. Polyspherula are; 3,4-dihydroxybenzoic acid (85), 16-phenylhexadecanoic acid (86), undecylbenzene (87), lauric acid (88), myristic acid (89), pentadecanoic acid (90), 1-tridecene (91), trimyristin (92), δ-tocotrienol (93) and stigmasterol (94). Meanwhile, for h. Tomentosa, the isolated compounds include trimyristin (92), (-)-sesamin (95), 1-(2,4,6-trihydroxyphenyl)decan-1-one (96), 1-(2,4,6-trihydroxyphenyl)-12-phenyl-dodecan-one (97), 1-(2,6-dihydroxy-4-(octylo-xy)phenyl)-11-undecan-1-one (98), 9-octyl-sesamin (99) and methyl myristate (100), three of which 97-99 are new.
- PublicationCrystallization Study Of Silicoaluminophosphate Zeolites Templated Using Pyridinium Cations And Their Catalytic Behaviors In Esterification Reactions(2025-06)Mohammad, Al Issa Jehad MohdfathiThis thesis presents three interconnected studies on the crystallization of SAPO zeolites. The first study investigates the crystallization of SAPO-11 under ionothermal conditions using 1-propylpyridinium bromide ([PPy]Br) as template. The effects of synthesis parameters are studied, and SAPO-11 with an acidic nature and high surface area is successfully synthesized after 133 h of heating at 150 °C. The second study explores the crystallization of SAPO-5 under hydrothermal conditions using 5-ethyl-2-methyl-1-propylpyridinium hydroxide ([empy]OH) new template, where H3PO4 and H4P2O7 are used as comparative P sources. Both crystallization processes are followed, and the effects of these P sources on the crystallization and structural properties of SAPO-5 are examined. The findings reveal that H3PO4 yields highly crystalline hierarchical SAPO-5 with high acidity, whereas H4P2O7 promotes nucleation, forming SAPO-5 nanoplates with textural mesoporosity. The third component focuses on the catalytic performance of synthesized SAPO zeolites.
- PublicationKesan Cr(VI) Terhadap Proses Nitrifikasi Dan Denitrifikasi Dalam Reaktor Kelompok Berturutan (SBR)(2003-02)Yeoh, Seow ChenObjektif kajian ini bertujuan untuk (1) menyelidik kesan Cr(VI) terhadap proses nitrifikasi dan denitrifikasi dalam sistem reaktor kelompok berturutan (SBR) dan (2) meninjau kesan serbuk karbon teraktif (PAC) dalam pengurangan ketoksikan Cr(VI).