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Pembangunan dan kebolehgunaan kit \"Poket Pertukaran Gas\" bagi subtopik Pertukaran Gas dalam Manusia dalam kalangan pelajar tingkatan empat

Titania Valencia Nyalo Kiong

Abstract

Pelajar mengambil masa yang lama untuk menguasai subtopik Pertukaran Gas dalam Manusia. Oleh itu, kajian ini bertujuan untuk membangunkan kit Poket Pertukaran Gas bagi subtopik Pertukaran Gas Dalam Manusia dan menilai kebolehgunaannya dalam kalangan pelajar tingkatan empat. Kajian ini dilaksanakan menggunakan reka bentuk kajian pembangunan yang menerapkan model ADDIE. Kajian ini telah melibatkan seramai 60 orang pelajar tingkatan empat. Teknik persampelan yang digunakan dalam kajian ini adalah teknik persampelan rawak bertujuan. Kajian ini menggunakan dua instrument iaitu borang kesahan pakar dan juga borang soal selidik kebolehgunaan kit Poket Pertukaran Gas. Seterusnya, data kajian yang telah diperoleh dianalisis menggunakan perisian Statistical Package for Social Science (SPSS) versi 27. Berdasarkan dapatan kajian, kit Poket Pertukaran Gas mempunyai kesahan yang memuaskan yang mana nilai persetujuan pakar adalah 85.83%. Berdasarkan dapatan kajian, kit Poket Pertukaran Gas.....

Final Year Project Published 2024 600 hits Available

Effect of aging time on the formation of Mesoporous Titania Nanoparticles via Sol-gel method

Siti Munirah Sidik

Abstract

This paper reports the effect of aging time (2, 4 and 6 days) on the formation of mesoporous mitania nanoparticles (MTN) prepared via sol-gel method. The structural properties of the prepared catalysts were investigated by X-ray diffraction (XRD), Field-emission scanning electron microscopy (FESEM) with EDX analysis and N2 adsorption-desorption analysis (BET). The XRD analysis revealed that MTNs were successfully synthesized and possessed different crystallite size depending on the aging time. Morphology studies using FESEM-EDX witnessed the formation of agglomerated spherical nanoparticles in the range of 5-50 nm and uniform distribution of Ti and O on the surface of catalysts. N2 adsorption-desorption analyses demonstrated MTN-2 possessed the largest surface area and pore volume compared to the MTN-4 and MTN-6, which due to blockage of the interparticle voids and excessive particles growth of MTN upon prolonged aging time. The MTN-2 achieved 88.35% of MB photodegradation within 210 m.....

Article Published 2024 349 hits Available

Incorporation of Fe and gC3N4 into Mesoporous Titania Nanoparticles for photodegradation of Dibenzothiophene

Nurul Adilah Mohd Noor

Abstract

This study aimed to incorporate Fe and gC3N4 into Mesoporous Titania Nanoparticles (MTN) and investigate photodegradation of Dibenzothiophene (DBT). MTN with various aging time (x = 2, 4, 6 and 8 days) were synthesized via sol-gel method before being incorporated with 5wt% Fe (5Fe/MTN-x) and 5wt% gC3N4 (5FeMTNx/ 5gC3N4) using wet-impregnation method. The photocatalysts were characterized using X-ray Diffraction (XRD), Field-Emission Scanning Electron Microscopy (FESEM) with EDX analysis, UV-Visible Diffuse Reflectance Spectroscopy (UVDRS), Fourier-Transform Infrared Spectroscopy (FTIR), Surface Area Analysis (BET), Photoluminescence Spectroscopy (PL) and Raman Spectroscopy. Photocatalytic performance was evaluated through DBT photodegradation under ultraviolet (UV) light irradiation for 180 min. Parameters such as H2O2 volume, DBT concentration and photocatalyst dose were manipulated with prolonging the reaction time to 240 min. The results of XRD showed the formation of MTN with the p.....

Thesis Published 2024 468 hits Available

Synthesis, properties and application of titanium dioxide doped with nitrogen. its effectiveness on photo degradation glutathione-s-transferase (GST) enzymes pupae instar of aedes aegypti

Alsalih, Moatasem

Abstract

The sol-gel method was used to create N-doped TiO2. From the characterization results, it was found that N-doped TiO2 using Titanium(IV) ammonia solution and calcination tetraisopropoxide 600 K provided the most appropriate properties for acting as the photo catalyst can be use as inhibitor of GST. SEM, AFM and XRD results indicated that this N-doped TiO2 catalyst had high crystallinity because its titania precursor was simply hydrolyzed completely so no organic contents blocked initial phase construction. SEM and AFM results demonstrated that its surface morphology was spherical like fluffy powders. Moreover, with increasing calcination temperature, its anatase-to-rutile phase transformation was retarded by the incorporated nitrogen. Elemental Analysis and UV-Vis/DR results also suggested that nitrogen could be dormant in the TiO2 lattice with strong bonds, causing the effect on the band gap structure by adding energy states nearly valence band of TiO2. All of these properties enhance.....

Article Published 2021 1225 hits Available

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