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2. The Physical Adsorption Characterization of Banana Peels as Activated Carbon Through the Employment of Microwave Technology is Being Conducted.

Author

Al-Rikabey, Muna N., Yusop, Mohamad Firdaus Mohamad, Badday, Ali Sabri, Ahmad, Mohd Azmier, Kacprzyk, Janusz, Series Editor, Novikov, Dmitry A., Editorial Board Member, Shi, Peng, Editorial Board Member, Cao, Jinde, Editorial Board Member, Polycarpou, Marios, Editorial Board Member, Pedrycz, Witold, Editorial Board Member, AlDhaen, Esra, editor, Braganza, Ashley, editor, Hamdan, Allam, editor, and Chen, Weifeng, editor

Published
2025
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5. The prospect of using hollow pyramidal microwave absorbers for 5G anechoic chamber applications: A review.

Author

Abu Sanad, Ala A., Mahmud, Mohd Nazri, Ain, Mohd Fadzil, Hussien, Mousa, Bin Ahmad, Mohd Azmier, Ariff, Zulkifli Mohamad, and Yahaya, Nor Zakiah

Subjects
ANECHOIC chambers, 5G networks, BANDWIDTHS, MICROWAVES, ABSORPTION
Abstract

Designing high-performance, wide bandwidth, lightweight, low-cost, and compact size absorbers for 5G anechoic chambers becomes essential. Several conventional absorbers, such as solid pyramidal absorbers, wedge absorbers, and convoluted absorbers, have shown acceptable absorption performance in a 5G mm-wave. However, these absorbers face challenges, such as narrow-angle of incidence, design complexity, and high cost. On the other hand, the hollow pyramidal absorber structures have a high level of freedom for optimization in order to be able to achieve the required specifications of 5G anechoic chambers. This paper provides an in-depth review of conventional absorber structures for use in anechoic chamber applications and their limitations for use in 5G applications, as well as the possibility of using hollow pyramidal absorbers in 5G anechoic chambers in comparison with conventional absorbers. [ABSTRACT FROM AUTHOR]

Published
2024
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7. A Review of Slotted Hollow Pyramidal Absorbers for Microwave Frequency Range

Author

Abu Sanad, Ala A., Mahmud, Mohd Nazri, Ain, Mohd Fadzil, Bin Ahmad, Mohd Azmier, Binti Yahaya, Nor Zakiah, Ariff, Zulkifli Mohamad, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Tan, Kay Chen, Series Editor, Ahmad, Nur Syazreen, editor, Mohamad-Saleh, Junita, editor, and Teh, Jiashen, editor

Published
2024
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34. Combined Role of Material Composition and Thickness of Activated Carbon/Natural Rubber Composite Microwave Absorbers in the Absorption of Within the 1–18 GHz Frequency Range: A Review

Author

Hussin, Roslina, Mahmud, Mohd Nazri, Ain, Mohd Fadzil Bin, Kamal, Shahanawaz, Mohammed, Abdullahi S. B., Ahmad, Mohd Azmier, Ariff, Zulkifli Mohamad, Yahaya, Nor Zakiah, Omar, Mohamad Faiz Mohamed, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Mahyuddin, Nor Muzlifah, editor, Mat Noor, Nor Rizuan, editor, and Mat Sakim, Harsa Amylia, editor

Published
2022
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39. Kinetics and Mechanism Study of Different Types of Surface‐Imprinted Polymers for CO2 Adsorption.

Author

Ishak, Noorhidayah, Mohamed Nasir, Azalina, Ibrahim, Muthmirah, Ahmad, Mohd Azmier, Hameed, Bassim H., and Mohd Din, Azam Taufik

Subjects
ATMOSPHERIC carbon dioxide, CARBON sequestration, IMPRINTED polymers, CLIMATE change, MOLECULAR imprinting, SILICA gel
Abstract

The increased level of CO2 in the atmosphere has led to global warming and climate change. To mitigate these problems, solid adsorbents have become attractive materials for capturing excess CO2 in the post‐combustion method. Molecularly imprinted polymer (MIP) can be applied to prepare highly selective adsorbents that could capture CO2 molecules. The MIP was prepared using the surface imprinted polymer technique in this preliminary work. Only two types of support materials were used (graphite and silica gel) to screen the best support material that could enhance the CO2 adsorption capacity of the resulting adsorbent, which was analyzed using a fixed‐bed column reactor. Graphite‐imprinted polymer (GMIP) was found to be a good potential for CO2 adsorption. The Avrami model best described the adsorption system, while the fixed‐bed curve data fit the Yoon–Nelson model well. The semi‐empirical method was used to assess the interaction mechanism of the molecularly imprinted polymer with CO2 during adsorption. This investigation involved testing four different ratios of the template complex to functional monomers. The ratio of 1:4 (CO2:Allylthiourea) demonstrated the highest binding energy, with a higher formation of hydrogen bonds. Film diffusion and intraparticle diffusion were the main rate‐limiting steps that played vital roles at different stages of CO2 adsorption. This preliminary work has enhanced the development of MIP for CO2 adsorption and showcased the integration of computational approaches in tailoring specific MIPs. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Acetaminophen removal using porous activated carbon derived from corn cob: optimization and mass transfer modelling.

Author

Ramli, Mohamad Razif Mohd, Shoparwe, Noor Fazliani, Ahmad, Mohd Azmier, and Yusop, Mohamad Firdaus Mohamad

Subjects
ENVIRONMENTAL research, SCIENTIFIC community, ACTIVATED carbon, RESPONSE surfaces (Statistics), CORNCOBS
Abstract

BACKGROUND: Acetaminophen, also known as paracetamol, has been notably detected in aquatic environments, including wastewater, surface water and drinking water, causing significant concern within the scientific and environmental research communities. This study focuses on two main objectives: (i) optimizing corn cob‐based activated carbon (CCAC) through response surface methodology for the adsorption of acetaminophen and (ii) simulating the acetaminophen adsorption process using the polymath mass transfer (PMT) model. RESULTS: The optimized CCAC was prepared via physiochemical activation under microwave radiation (265 W power) for 6 min, with a KOH impregnation ratio of 0.50 g g−1. This process resulted in a high Brunauer–Emmett–Teller surface area of 976.29 m2 g−1, accompanied by a corresponding pore volume of 0.39 cm3 g−1 and a pore diameter of 2.38 nm. The adsorption study, employing differential initial concentrations (ranging from 5 to 30 mg L−1) of acetaminophen, revealed a substantial adsorption capacity of 22.43 mg g−1 (74.77%) at 30 °C and 20.74 mg g−1 (69.13%) at pH 6. The PMT model indicated an adsorption capacity (Qm) of 21.14 mg g−1, with an error of 5.75%, demonstrating high precision compared to the experimental result. Additionally, the calculated R2 values equal to or above 0.90 indicated strong agreement between the PMT model and experimental data. CONCLUSION: Thus, applying the PMT model proved to be economical and cost‐effective, providing accurate predictions on surface area during adsorption performance compared to the time‐consuming and costly process of conducting characterizations. © 2024 Society of Chemical Industry (SCI). [ABSTRACT FROM AUTHOR]

Published
2024
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