Mohd Riduan Jamalludin
Thumbnail Image
Preferred name
Mohd Riduan Jamalludin
Official Name
Mohd Riduan , Jamalludin
Alternative Name
Jamalludin, M. R.
Riduan Jamalludin, Mohd
Main Affiliation
Scopus Author ID
55778617300
Researcher ID
M-4808-2019
AAU-5306-2020

Research Output

Filters

38
Reset filters

Settings
Now showing 1 - 10 of 38
Thumbnail Image
Publication

Effect of heat sink design on the thermal characteristic in computational fluid dynamics analysis

2020-12-18 , Khor Chu Yee , Mohd Al-Hafiz Mohd Nawi , Ishak M.I. , Kee W.C. , Rosli M.U. , Mohd Riduan Jamalludin , Siti Nor Azreen Ahmad Termizi

The thermal management in the electronic device or system using the heat sink is important to ensure the device or system operating under the allowable temperature. The present study aims to investigate the thermal characteristic (i.e., temperature distribution) of the various heat sink designs via computational fluid dynamics (CFD) analysis. The electronic cooling process of the heat sink is carried out via CFD software. The temperature distribution of the various heat sink designs (i.e., plate fin, circular pin fin and rectangular fin) was analyzed and compared. The CFD analysis revealed the plate fin heat sink has lowest temperature distribution on the fin region. High temperature distribution was observed on the pin fin heat sink. The non-uniform temperature distribution was attributed by the direction of inlet airflow, whereas the low temperature was found in the region that close to the inlet airflow. Thus, the research findings indicated the design of heat sink significantly affects the temperature distribution during the electronic cooling process.

View
Thumbnail Image
Publication

Facile fabrication of superhydrophobic and superoleophilic green ceramic hollow fiber membrane derived from waste sugarcane bagasse ash for oil/water separation

2020-01-01 , Mohd Riduan Jamalludin , Hubadillah S.K. , Harun Z. , Othman M.H.D. , Yunos M.Z. , Ismail A.F. , Salleh W.N.W.

Green ceramic hollow fiber membranes with superhydrophobic and superoleophilic surfaces (ss-CHFM/WSBA) were successfully fabricated via facile sol–gel process using tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) as precursors. In this work, silica solution was prepared using the modified Stöber method. This process was followed by dipping the pristine membranes into the sol–gel solution at various grafting times (0–90 min), grafting cycles (0–4 cycles), and calcination temperatures (400–600 °C). The wettability, surface morphology, and chemical composition of the pristine and ss-CHFM/WSBA membranes were investigated. The results showed that increasing the grafting time has increased the wettability of ss-CHFM/WSBA with high contact angle of up to 163.9°. Similarly, increasing grafting cycle has enhanced the hydrophobicity of ss-CHFM/WSBA due to the formation of hierarchical structure of grafting cycle which were more than one. The optimum calcination temperature for ss-CHFM/WSBA was identified. It was found that increasing the calcination temperature has degraded the sol template on the surface of ss-CHFM/WSBA, hence decreasing the wettability. The preliminary performance tests showed that ss-CHFM/WSBA grafted at 60 min, 3 cycles, and calcined at 400 °C showed excellent oil/water separation efficiency of 99.9% and oil flux of 137.2 L/m2h.

View
No Thumbnail Available
Publication

Acid-activated natural zeolite clinoptilolite functionalized with curcumin for superior methylene blue adsorption: insights into optimization, characterization, and adsorption mechanisms

2025 , Nur Fatin Atikah Abdul Mutalib , Azat Seitkhan , Muhammad Bisyrul Hafi Othman , Abdul Qaiyum Ramle , Norliyana Mohd Salleh , Mohd Hafiz Dzarfan Othman , Siti Khadijah Hubadillah , Mohd Riduan Jamalludin , Nur Nabihah Yusof , Mohd Ridhwan Adam

This study investigates the treatment of natural zeolite clinoptilolite (NZC) through acid and base pretreatments, aiming to enhance its adsorption efficiency for methylene blue (MB) dye removal. The results indicate that NZC treated with 3.0M HCl (hydrochloric acid) exhibits superior MB removal efficiency (93.24%) compared to 1.0M NaOH (sodium hydroxide)-treated NZC (91.40%), accompanied by a higher Brunauer-Emmett-Teller (BET) surface area (135.5002m2/g) in contrast to (43.6059m2/g). The optimized 3.0M HCl-treated NZC is further functionalized with curcumin, resulting in CUR-HCl-NZC, which demonstrates enhanced MB removal efficiencies of 95.09% at 45min and 83.81% at 90min, surpassing untreated NZC. The adsorption parameters, including contact time (45min), adsorbent dosage (0.2g), and initial dye concentration (25ppm), are systematically varied to optimize the conditions for CUR-HCl-NZC. Characterization through Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and BET analysis confirm the successful binding of curcumin to HCl-treated NZC, revealing structural and surface modifications. BET analysis shows that the surface area of CUR-HCl-NZC is 100.0382m2/g, indicating changes in porosity due to curcumin modifications. The isotherm analysis identifies the Langmuir isotherm model as the best fit, with a correlation coefficient (R 2) of 0.9996 and adsorption capacity of 41.203mg/g, suggesting monolayer adsorption dominance. This study establishes CUR-HCl-NZC as an effective, low-cost adsorbent for the removal of MB, offering a promising solution for water purification applications.

View
No Thumbnail Available
Publication

Green synthesis and characterization of Fe doped TiO₂ nanoparticles using Lawsonia Inermis leaf aqueous extracts as reductant for photocatalytic activity

2023 , Syamsutajri Syamsol Bahri , Zawati Harun , Wan Norhayati Wan Salleh , Rosniza Hussin , Nur Hanis Hayati Hairom , Noor Hasliza Kamaruddin , Hatijah Basri , Nurul Izwanie Rasli , Afiqah Rosman , Mohd Riduan Jamalludin , Ainun Rahmahwati Ainuddin

Recently, the improvement and advancement in synthesizing nanoparticles via eco-friendly technique have been intensively explored since the used conventional physical and chemical methods always associated to the intensive energy usage and toxic waste pollution Therefore, nanoparticles synthesized from green route technique has initiate an interest among researchers due to its clean and eco-friendliness approach. In this study, the Fe doped TiO₂ were synthesized using lawsonia inermis aqueous leaf extracts that act as reducing agent as well as capping and stabilizing agent. The green synthesized powder was then calcined and characterized using XRD, FESEM, EDX, FTIR and UV-Vis while photocatalytic activity was evaluated based on photodegradation efficiency of methylene blue (MB). The new obtained green calcined powder was found to have a crystalline phase (anatase structure) with crystallite size, 6.79 nm identified by XRD. The FESEM test shows the average particle size of the green synthesized calcined Fe doped TiO₂ is in the range of 54.5 nm with capping agent (phyto-constituents) authorized by FTIR spectra. From EDX analysis, Fe ions was successfully incorporated into TiO₂ compound during synthesis process confirmed by the presence of Fe element. It was observed that the band gap energy for green calcined Fe doped TiO₂ is approximately 2.66 eV. The green synthesized calcined Fe doped TiO₂ sample presented the highest photocatalytic activity efficiency under uv light irradiation for 3 hour which is 92.2% with only 7.8% of MB remained, this value is slightly higher than that of commercial P25 powder which is 90.7%. In conclusion, the green synthesis technique of using lawsonia inermis as natural resources as reduction agent was able to produce nanoparticles Fe doped TiO₂. Moreover, the properties of Fe doped TiO₂ nanoparticles has strong potential to be used as a photocatalyst since this sustainable green synthesis technique able to produce better nanoparticles properties as compared to conventional synthesis.

View
Thumbnail Image
Publication

Electrospinning parameters evaluation of PVDF-ZnO/Ag2CO3/Ag2O composite nanofiber affect on porosity by using response surface methodology

2020-01-01 , Rosman N. , Wan Salleh W.N. , Mohd Riduan Jamalludin , Adam M.R. , Ismail N.H. , Jaafar J. , Harun Z. , Ismail A.F.

The electrospinning process is a very important technique for fabricating polymeric nanofibers by applying external electrostatic forces. This study reports on the modeling of the electrospinning process of polyvinylidene fluoride (PVDF) and the immobilized ZnO/Ag2CO3/Ag2O using response surface methodology (RSM) based on the central composite design (CCD). The individual and interaction effects of the most effective variables, such as applied voltage (6.5, 8 and 9.5 kV), nozzle-collector distance (10, 12.5 and 15 cm) and ZnO/Ag2CO3/Ag2O photocatalyst concentration (0.1, 0.8 and 1.5 g), have been evaluated on the porosity response of the nanofiber. The analysis of variance (ANOVA) confirmed that the spinning voltage was the main variable affecting the average porosity of the composite PVDF nanofiber. The regression coefficient between the variables and the mean porosity (R2= 0.8321) indicates acceptable evaluation of experimental data by quadratic polynomial regression.

View
No Thumbnail Available
Publication

Facial synthesis of colloidal stable magnetic nanoparticles coated with high hydrophilic negative charged poly(4‐styrenesulfonic acid co‐maleic acid) sodium for water remediation

2023 , Lim Chuan Chuan , Ng Qi Hwa , Hoo Peng Yong , Siti Kartini Enche Ab Rahim , Mohd Riduan Jamalludin , Amira Mohd Nasib , Sigit Tri Wicaksono , Azzah Dyah Pramata , Siti Zullaikah

The enhancement of the colloidal stability of magnetite nanoparticles (MNPs) for environmental‐related fields has greatly attracted researchers' attention. This study used a high hydrophilic negatively charged polyelectrolyte, poly(4‐styrenesulfonic acid co‐maleic acid) sodium (PSAAS), to enhance the colloidal stability of MNPs. Coating of the naked MNPs with PSAAS polyelectrolyte is a simple and rapid method to obtain colloidally stable MNPs while sustaining the chemical reactivity of MNPs in water purification. The prepared PSAAS‐coated MNPs were characterized by scanning electron microscope, energy dispersive X‐ray, Fourier transform infrared, zeta potential analysis, transmission electron microscope and X‐ray diffraction. Moreover, the colloidal stability and adsorption performance tests of these naked MNPs and PSAAS‐coated MNPs (with different concentrations of PSAAS coated) were investigated and compared. PSAAS‐coated MNPs with 0.001 g/ml PSAAS coating possessed the best colloidal stability and the highest methylene blue (MB) dye removal efficiency (94.53 ± 0.69%). The adsorption isotherm and kinetic studies for the adsorption of MB onto PSAAS‐coated MNPs were well‐described by the Langmuir model and pseudo‐second‐order kinetic model. These magnetic adsorbents, with high separation efficiency, simple and low production cost and recyclable property, are promising as practicable adsorbents in water treatment.

View
Thumbnail Image
Publication

Conceptual design and computational analysis of traditional boat passenger seat

2020-11-02 , Hasbullah M.H. , Mohamad Suhaimi Shahrin , Nurul Anasuhah Zakaria , Muhammad Ikman Ishak , Mohd Riduan Jamalludin , Mohd Haidiezul Jamal Ab Hadi , Norfaseha Nordin , Deraman A.S.

Todays, there are various of optimisation methods that have been studied by many researchers in order to find the appropriate combination of processing parameters setting in the injection moulding process. From the previous literatures, the optimisation works have been proven will improve the moulded part quality. In this study, the application of optimisation work to improve warpage of front panel housing has been explored. By selecting cooling time, coolant temperature, packing pressure and melt temperature as the variable parameters, design of experiment (DOE) have been constructed by using the rotatable central composite design (CCD) approach. Response Surface Methodology (RSM) was performed in order to define the optimal processing parameters setting which will optimise the warpage condition. Based on the results, melt temperature is the most significant factor contribute to the warpage condition and warpage have optimised by 47.1% after optimisation. The findings show that the application of optimisation work offers the best quality of moulded part produced.

View
Thumbnail Image
Publication

Parameters adjustments for facile synthesis of high magnetization iron oxide nanoparticles from natural sand

2024-02-01 , Wahfiudin A. , Pramata A.D. , Wicaksono S.T. , Ng Qi Hwa , Amira Mohd Nasib , Siti Kartini Enche Ab Rahim , Mohd Riduan Jamalludin , Hoo Peng Yong

This study explores the synthesis of Superparamagnetic Iron Oxide Nanoparticles (SPIONs) by leveraging natural iron sand and steel wool as primary raw materials within the co-precipitation method, which reduces the cost of production compared to the commercial counterparts. The research systematically investigated the influence of the diethylamine percentage, annealing time and annealing temperature on the SPIONs’ synthesis from natural iron sand by the co-precipitation method. Fe3O4 with varying crystallite sizes, ranging from 11.5 to 14.7 nm, were confirmed. SEM highlighted the nanoparticle agglomeration, a concern addressable through surface modification techniques, as further emphasized by TEM, which confirmed the nano-scale dimensions. Magnetic saturation values were confirmed by VSM, ranging from 37 to 51 emu/g. These values established the superparamagnetic behavior, rendering the nanoparticles suitable for versatile applications. The study identifies a potential threshold effect of the diethylamine concentration on the magnetic saturation and suggests an optimum annealing temperature for energy efficiency. This research contributes valuable insights into harnessing natural iron sand for SPION synthesis, advancing cost-effective and sustainable approaches in nanomaterial development, while emphasizing the importance of parameter customization for producing high-quality SPIONs.

View
No Thumbnail Available
Publication

Polymer mixed membrane with microflower TiO₂ as additive for photocatalyst in organic compound

2021 , Raja Adibah Raja Ahmad , Zawati Harun , Faiz Hafeez Azhar , Rosniza Hussin , Mohamad Faiz Mohd Zin , Norsuhailizah Sazali , Syamsutajri Syamsul Bahri , Mohd Riduan Jamalludin , Nurasyikin Misdan , Zakiah Kamdi , Nur Hanis Hayati Hairom

This study investigate the performance and physical properties of polymer mixed membrane integrated with the microflower of titanium dioxide (TiO₂) that synthesized at different temperature value. Microflower TiO₂ has been prepared by hydrothermal method with variation of synthesized temperature at 120 °C, 150 °C and 180 °C and the polymer flat sheet membranes were fabricated via phase inversion technique. In this present work, TiO₂was used as photocatalytic, antifouling and hydrophilicity improvement. Synthesized microflower TiO₂v ia hydrothermal method offer higher surface area that able to speed up any chemical reaction of TiO₂. Prior to the fabrication of polymer mixed matric membrane, the characterization of TiO₂ have been conducted to determine the optimum synthesize temperature. Then this was followed by the measurement of properties and performance of the polymer mixed matric membrane. Further observation on the self-cleaning test at different concentration of TiO₂ wt (%) of the membranes were conducted. The results obtained showed that membrane at temperature of 150 °C with 2.5% of TiO₂ wt (%) shows a better result than others with the highest rejection rate of 99.43% that probably due to small finger like structure. Meanwhile for self- cleaning test, membrane with synthesized temperature of 150 °C showed a better result than others with the highest of retention rate before and after being exposed to UV light which were 99.42% and 98.66% respectively. Humic acid flux recovery ratio (FRR) showed a better performance for membrane at synthesized temperature of 120°C that may relate to the effect of higher surface area that TiO₂ that able to attract more water. As conclusion, PSf/TiO₂ membrane at synthesized temperature of 150 °C with 2.5% of TiO₂ wt (%) shows an excellent result that possessed a strong hydrophilic property by lowering the fouling effect and give higher retention value.

View
Thumbnail Image
Publication

Biogas production from the paddy straw pretreated with Sodium Hydroxide and co-digestion with cow manure

2024-03 , Tengku Roslina Tuan Yusof , Muizz Zahari , Mariam Majid , Abdul Syafiq Abdul Syukor , Mohd Riduan Jamalludin

Paddy straw waste (PS) is an organic waste that is disposed in open land after preparation of rice harvest that is generated in equal or greater quantities than the rice itself. Generally, it is disposed in open land, which increases anthropogenic gases. Converting it into useful energy or value-added products may reduce disposal problems and anthropogenic activity. In this study, PS with different treatments of sodium hydroxide (NaOH) at 2, 4, 6 , 8 and 10% was co-digested with cow dung (CD) for obtaining biogas by anaerobic digestion. For this purpose, PS was mixed with CD at different proportions, namely 50:50, 40:60, 30:70, 20:80, and 0:100 percentages on a mass basis, the samples were used in five different anaerobic digesters. The samples were kept in different anaerobic digesters for the study. The effect of important input parameters like pH and Carbon to Nitrogen (C/N) ratio on the biogas production was studied. Maximum biogas production was obtained from the co-digestion of the substrate containing 30% ps and 70% Cd for a digestion time of 20 days, and d3 shows a max pH value of 7.16. Further, the biogas collected from the digesters was characterized to ensure suitability for use as a renewable fuel. Furthermore, the digested slurry was also analyzed for its use in agriculture. The results are presented in this paper.

View