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.....

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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.....

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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.....

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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 .....

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