UPSI Digital Repository (UDRep)
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Total records found : 7 |
Simplified search suggestions : Faridah Lisa Supian |
1 | 2017 article | Copolysiloxane solvent detector using langmuir-blodgett surface potential method Supian Faridah Lisa, Yahaya Rozita, Lim D.C.K., 933 hits |
2 | 2017 article | Conductivity comparison of Calix[8]arene-MWCNTs through spin coating technique Supian Faridah Lisa, Kheng Darvina Lim Choo, Razal Amira Shakila, 1069 hits |
3 | 2019 article | Surface potential and temperature effect studies of homo- and copolysiloxanes through Langmuir Blodgett technique Faridah Lisa Supian Hydrophilic backbone chains with substituted hydrophobic organic groups give rise to amphiphilic polysiloxane. This property is of great interest as it can form a Langmuir monolayer, an orderly arranged layer that can be utilised in any potential nanoscale application. Hence, a study was conducted on the surface pressure, surface potential and effective dipole moment of various homopolysiloxane and copolysiloxane Langmuir films to clarify some of their monolayer properties. A NIMA Langmuir 611D trough accompanied with a NIMA surface potential (S-POT) probe was employed in this work. The space filling model, generally known as the Corey, Pauling and Koltun (CPK) precision molecular model, was used to construct the siloxanes unit of each set of polysiloxanes to estimate the siloxane unit size. From the surface pressure isotherm, it was observed that copolysiloxanes are more condensed than homopolysiloxanes. By comparing the results extrapolated from the graph with CPK modelling, the stru..... 1338 hits |
4 | 2021 article | Correlation of langmuir isotherm, optical, surface potential and morphological characterizations of two functionalized dihydroxycalix [4] arene for lead cation entrapment Faridah Lisa Supian The versatilities of calixarenes have been known primarily in the host-guest world. In this work, two calix[4]arenes, namely C-DHC4 and N-DHC4, possess the same lower rim but are distinct in the upper rim. The Langmuir Isotherm and optical properties have been carried out using Langmuir?Blodgett trough and UV-Visible spectroscopy, respectively. The topographical image of the calix[4]arenes has been observed using FESEM, and lead cation entrapments of these calix[4]arenes have been inspected using the surface potential sensor. The isotherm graph revealed the size of each calixarene; C-DHC4 ~ 1.90 nm2 and N-DHC4 ~ 2.10 nm2 . The UV-Visible result demonstrated that each calix[4]arene has two firm absorption peaks where C-DHC4 has two broad peaks, which lie in 261 and 330 nm, while N-DHC4 has two shoulders at 275 and 282 nm. FESEM images have shown the formation of calix[4]arene nanocluster. Further monitoring on the surface potential and effective dipole moment indicate that C-DHC4 perfor..... 849 hits |
5 | 2023 article | The evaluation of a technology-embedded solar energy stem (Sestem) module: A pilot implementation of modern teaching tool for diploma science students Faridah Lisa Supian Utilising an excellent teaching tool is vital for students education nowadays. In contrast to the traditional teaching way, Technology-Embedded Solar Energy STEM (SESTEM) module was created as a modern teaching tool for physics subject. In order to develop and evaluate the students perception towards the complete SESTEM module, developmental research and technology acceptance model (TAM) were applied in this research study. 52 randomly selected diploma students from Sultan Idris Education University (UPSI) were involved as respondents in this work. After the development of the SESTEM module using the analysis, design, development, implementation and evaluation (ADDIE) model, the perceptions of students as respondents towards this module were evaluated based on the TAM via questionnaire. Based on the responses from the respondents, the majority of the respondents demonstrated positive attitudes and behaviour intention, as well as agreed that the SESTEM module was useful as a teaching to..... 92 hits |
6 | 2023 article | Cigarette filter butts-derived activated carbon with free binder electrode design for solid-state supercapacitor application Faridah Lisa Supian The aim of this research is to formulate activated carbon monolith from hazardous waste of cigarette filter butts (CFB) for electrode material monolith design in solid-state supercapacitor application. Potassium hydroxide (KOH) was selected for activation. The ratio of CFB to KOH varied in terms of weight between 1:2 and 1:4, thereby obtaining activated cigarette filter carbon (ACFC). The carbon that has been obtained is designed to be solidly in the form of an additive-free monolith. Monolith-activated carbon is physically characterized to examine thermal decomposition profiles (pre-carbonized), structure, composition, morphology, surface area adsorption, and electrochemical measurements. The optimum precursor was marked with high wettability with self-O-doped of 5.44%.in carbon content of 94.56%. Activated carbon electrodes prepared from ACFCs showed an optimum specific capacitance of ~87.17 F g-1, which is a more ecologically responsible method of producing supercapacitors. 2023 The..... 69 hits |
7 | 2023 article | Synthesis and characterization of photocatalyst nanocomposite for the degradation of organic pollutants in wastewater Faridah Lisa Supian Various efforts can be made to obtain clean water in the environment by utilizing semiconductor technology. This study aims to inform the synthesis and characterization of MnO2/CuO/Fe2O3 photocatalyst for crystal violet degradation in wastewater. Nanocomposite was synthesized through a sol-gel process with three semiconductor materials doped. X-ray diffraction (XRD) was employed to analyze the nanocomposite structure and determine crystal size. Fourier transform infrared (FTIR) was used to provide functional groups in the nanocomposite. A scanning electron microscope (SEM) can characterize surface morphology and particle size. The results of the SEM show that an increase in sintering temperature causes the smallest particle sizes to be 54.79 nm. The result of characterization using the ultraviolet-visible (Uv-Vis) spectrophotometry analysis the most effective band gap value in photocatalyst activity was 1.36 eV. The optimum percent of degradation MnO2/CuO/Fe2O3 catalyst was 50.40% for ..... 68 hits |