Pusat Pengajian Sains Kimia - Tesis
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- PublicationSynthesis, Characterization, And Photocatalytic Degradation Activities Of Tio2/Go And Zno/Go In Aqueous Medium(2025-07)Jamjoum, Hayfa Alajilani AbraheemThis research covers the preparation of TiO2 and ZnO photocatalysts using environmental friendly methods that involved the use of lime peel extract as a reducing and capping agent.
- PublicationPenggunaan Natrium Glukonat Sebagai Agen Pengkompleks Dalam Proses Penyaduran Tanpa Elektrik Kuprum(1996-12)Zakaria, HaslizaidiKajian tentang penggunaan natrium glukonat sebagai agen pengkompleks dalam larutan penyaduran tanpa elektrik kuprum bagi pelaplsan kuprum ke atas plastik akrilonitril butadiena stirena (ass) telah dijalankan. Pengkompleks asid etilena diamina tetraasetik (edta) dan natrium kalium tartrat telah digunakan sebagai perbandingan terhadap glukonat. Kajian beberapa gabungan glukonat-edta dengan nisbah kompleks glukonat-edta 1 :1, 1:2 dan 2:1 juga dilakukan untuk mengetahui kesannya terhadap kestabilan, ph, kadar pelapisan, suhu dan kepekatan komponen aktif. Didapati penggunaan pengkompleks glulmnat-edta (1 :1) [komposisi larutan terdiri daripada kuprum sulfat 5-hidrat sebanyak 8.0 gil, natrium glukonat -. Sebanyak 3.5 gil, edta sebanyak 6.0 gil, formaldehida (37 ok) sebanyak 90.0 mill dan natrium hidroksida sebanyak 10.0 gil] adalah lebih stabil berbanding dengan larutan yang hanya mengandungi pengkompleks glukonat sahaja [komposisi larutannya terdiri daripada kuprum sulfat 5-hidrat sebanyak 8.0 gil, natrium glukonat sebanyak 7.0 g/l, formaldehida (37 o..{,) sebanyak 90.0 mill dan natrium hidroksida sebanyak 10.0 gil]. Larutan penyaduran tanpa elektrik kuprum yang menggunakan penqkornpleks tartrat paling tidak stabil. Keadaan operasi yang optimum bagi pengkompleks glukonat ialah ph antara 12.4-12.6 dan pada suhu bilik. Kadar pelapisan bagi larutan menggunakan pengkompleks glukonat adalah paling perlahan manakala kadar pelapisan bagi pengkompleks edta yang paling cepat.
- 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.