Article
Engineering, Environmental
Zih-Yu Chen, Webber Wei-Po Lai, Hank Hui-Hsiang Lin, Jia Xuan Tan, Kevin C. -W. Wu, Angela Yu-Chen Lin
Summary: This study developed a TiO2/SiO2@Fe3O4 core-shell magnetic photocatalyst for the degradation of ketamine. The photocatalyst exhibited high degradation efficiency and stable performance under simulated solar irradiation. The mechanistic investigation revealed the involvement of center dot OH, h+, and center dot O2- in ketamine degradation, with center dot O2- playing a dominant role.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Ahmed Mohamed El-Toni, Mohamed A. Habila, Mohamed Sheikh, Mohamed El-Mahrouky, Abdulrhman S. Al-Awadi, Joselito P. Labis, Zeid A. Alothman
Summary: Fe3O4 core-TiO2/mesoSiO(2) and Fe3O4 core-mesoSiO(2)/TiO2 double shell nanoparticles were prepared and used for the removal of methylene blue. The adsorption capacities and kinetics followed the pseudo-second order model, and the adsorption isotherms followed the Freundlich model. The thermodynamic investigation indicated a spontaneous tendency for the adsorption process. The results highlight the potential of these double shell nanoparticles as adsorbents for the removal of various contaminants from wastewater.
Article
Materials Science, Multidisciplinary
Kwang-Hyok Han, Yong-Ho Kim, Myong-Hak Mun, Ju-Hyon Yu, Ryong-Huan Han
Summary: A polypyrrole-modified Fe3O4/SiO2/TiO2 composite material was successfully synthesized on the FST surface by in situ polymerization of pyrrole. The structural, morphological and magnetic response were characterized, and the catalytic activity of the material was evaluated. The results showed that FST/PPy exhibited excellent photocatalytic activity and the degradation rate was significantly improved under visible light. Furthermore, the photocatalyst could be easily recycled using a magnet.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yunfeng Lei, Xuezhong Zhang, Xiangyu Meng, Zhifei Wang
Summary: This study developed multi-carboxyl functionalized Fe3O4@SiO2 magnetic nanoparticles (mCMNPs) through simplified modification strategies for the removal of methylene blue (MB) in water treatment. It was found that increasing the carboxyl content on the surface of CMNPs significantly improved the removal process. Among different types of CMNPs, mCMNPs with the highest surface carboxyl densities showed the highest removal efficiency. Optimized parameters including solution pH, initial MB concentration, and sorption time were determined to achieve the best removal efficiency. The synthesized mCMNPs exhibited excellent regeneration ability and recyclability, making them a promising adsorbent for the removal of MB in water treatment.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Maryam Rostami Ataabadi, Masoud Jamshidi
Summary: The removal of organic dyes from wastewater using photocatalytic oxidation (PCO) under visible light has gained attention from scientists. In this study, TiO2 nanoparticles were modified with amino-propyltriethoxysilane (APTES) at different concentrations and applied to acrylic latex to prepare photocatalytic nanocomposite paints. The modified nanoparticles showed enhanced photocatalytic degradation of methylene blue under different light sources and improved the tensile strength and toughness of the acrylic film. The modified paints displayed significant improvements in the discoloration of methylene blue stains compared to pure nano TiO2 containing nanocomposites.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Physical
Italo Lacerda Fernandes, Danns Pereira Barbosa, Sergio Botelho de Oliveira, Valdeir Antonio da Silva, Marcelo Henrique Sousa, Marly Montero-Munoz, Jose A. H. Coaquira
Summary: The study demonstrates that the double-coated magnetic nanoparticles nanocomposites exhibit excellent photocatalytic activity with strong degradation capability against methylene blue dye, as well as high stability. These nanocomposites have great potential for applications in wastewater treatment and purifying contaminants.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Aubrey Makofane, David E. Motaung, Nomso C. Hintsho-Mbita
Summary: This study synthesized ZnFe2O4 nanoparticles using a plant extract and demonstrated their potential application in removing dyes and pharmaceutical pollutants. Characterization and performance tests confirmed the stability and efficiency of the nanoparticles for water treatment, highlighting their promising prospects in environmental remediation.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Mahdieh VafaeiAsl, Iman Keshavarz, Farzaneh Shemirani, Parastoo Jamshidi
Summary: This article investigates the photocatalytic performance of a nanocomposite, consisting of two nanocore-shell-nanoparticles, Fe3O4@SiO2 and WO3@TiO2, for degrading methylene blue (MB). The materials were prepared using environmentally-friendly reagents and energy efficient methods. The characterization of the materials was conducted using various techniques. The optimal conditions for methylene blue degradation were determined, and the nanocomposite showed good reusability and durability.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Physical
Shiyang Zhang, Mingwei Cai, Jiahao Wu, Zhi Wang, Xiaochuang Lu, Kaixin Li, Jng Min Lee, Yonggang Min
Summary: TiO2/MXene composites were synthesized and showed enhanced removal efficiency for methylene blue (MB) dye. The removal rate of MB by TiO2/MXene composite materials was 96.44% under ultraviolet light, 29.83% higher than pure TiO2. Under visible light, the removal rate of MB was 8.26 times higher (40.19%) than pure TiO2. This enhancement was attributed to improved charge antirecombination and high adsorption capability toward MB.
CATALYSIS COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Duygu Akyuz
Summary: Metal oxides are commonly used catalysts for removing dyes and toxins. The synthesized catalyst showed excellent degradation rate and efficiency, as well as high photocurrent density, stability, and recyclability under UV light irradiation.
Article
Chemistry, Physical
Urbashi Mahanta, Mudrika Khandelwal, Atul Suresh Deshpande
Summary: An efficient SiO2-TiO2 nanoparticle system has been developed for enhanced photocatalytic degradation under natural sunlight and low-power UV light. Different mole ratios of SiO2 to TiO2 were used, with the 5:1 ratio system showing the highest adsorption capacity and the 2:1 ratio system demonstrating the best photocatalytic degradation performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Abdelhamid M. El-Sawy, Ali H. Gemeay, Ali S. Helal, Mohamed A. Salem
Summary: A novel core-shell nanosphere designed as a catalyst was successfully synthesized via a surface-protected etching technique, showing promising catalytic activity for the degradation of methylene blue. The partially etched nanosphere exhibited good catalytic performance and has potential applications in pollutant removal.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Seong Youl Lee, Hoang Tung Do, Joon Heon Kim
Summary: Plasmonic photocatalysts consisting of TiO2 and Au nanoparticles show enhanced photocatalytic activity for degrading organic dyes under UV and visible light. Mechanism studies reveal that the contribution of hole oxidation and electron reduction pathways for dye degradation differs depending on the wavelength of irradiating light.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
David F. F. Brossault, Thomas M. McCoy, Alexander F. Routh
Summary: A green approach for producing magnetic photocatalysts via direct agglomeration of commercial nanoparticles in emulsion was successfully demonstrated in this study. The aggregation was attributed to charge screening by salt addition. The experiment resulted in magnetically responsive beads with good adsorption and photodegradation properties, and they could be reused after magnetic separation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Mojdeh Atashkadi, Alireza Mohadesi, Mohammad Ali Karimi, Seyed Zia Mohammadi, Vida Haji Aghaei
Summary: In this study, a novel polymer-based photocatalyst was successfully fabricated using a co-precipitation method, which exhibited effective photocatalytic activity in the degradation of methylene blue under visible light irradiation. The nanocomposite PPS/PVA/Fe3O4, combining polyphenylene sulfide (PPS), polyvinyl alcohol (PVA) and Fe3O4 nanoparticles, demonstrated superior photocatalytic performance due to its broader absorption of visible light, suppression of electron-hole pair recombination, and increased surface area of the catalyst. The photocatalytic activity of PPS/PVA/Fe3O4 followed a pseudo-first-order kinetic model, and it showed good reusability and stability after multiple runs.
JOURNAL OF CLUSTER SCIENCE
(2023)
Article
Thermodynamics
Fadi Alnaimat, Mohammed Ziauddin
Summary: The study found that micrometer-sized fins have lower thermal resistance at smaller Reynolds numbers, while millimeter-sized fins have lower thermal resistance at larger Reynolds numbers. Fluid velocity plays a crucial role in heat transfer and has a more significant impact on thermal resistance compared to the size of the fins.
HEAT AND MASS TRANSFER
(2021)
Review
Chemistry, Physical
Ansar Kareem, Jaber Abu Qudeiri, Asarudheen Abdudeen, Thanveer Ahammed, Aiman Ziout
Summary: This study provides a review on AA 6061 aluminum alloy matrix composites produced through the stir-casting process. The majority of the studies showed that an increase in the reinforcement content enhanced the mechanical and tribological properties of the composites, and hybrid composites showed better material properties than single reinforcement composites. Future studies could focus on the fabrication of AA 6061 nanocomposites through stir casting and their material characterization, since they have great potential as advanced materials.
Article
Green & Sustainable Science & Technology
Mohammed Alkahtani, Aiman Ziout, Bashir Salah, Moath Alatefi, Abd Elatty E. Abd Elgawad, Ahmed Badwelan, Umar Syarif
Summary: This paper systematically investigates the collection systems in reverse logistics through literature review and bibliometric analysis, providing classification methods and literature evaluation in related fields. It offers insights for readers to identify research directions and gain a better understanding of the field.
Review
Thermodynamics
Khadije El Kadi, Fadi Alnaimat, S. A. Sherif
Summary: The paper provides a comprehensive review of condensation studies in microchannels conducted in the last two decades, including experimental investigations, theoretical predictive models, and computational predictions. It presents a wide range of operating conditions, channel geometries, heat transfer fluids, research methods, and advancements in condensation heat transfer in mini and microchannels.
APPLIED THERMAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Jeyaganesh Devaraj, Aiman Ziout, Jaber E. Abu Qudeiri
Summary: This study investigates the optimization and prediction models for welding parameters, utilizing methods such as grey-based Taguchi optimization and artificial neural networks. Experimental results demonstrate the superior predictive accuracy of machine learning models for welding outcomes.
Article
Engineering, Chemical
Ameera F. Mohammad, Aya A. -H. I. Mourad, Ali H. Al-Marzouqi, Muftah H. El-Naas, Bart Van der Bruggen, Mohamed H. Al-Marzouqi, Fadi Alnaimat, Mohamed Al Musharfy
Summary: This study investigated the effect of various parameters on the solid mass concentration, average solid velocity, and average solid volume fraction in an inert-particle spouted-bed reactor using CFD and DPM. Statistical analysis and optimization were performed to improve reactor performance by increasing interfacial area and reducing dead zones. The results showed that the selected parameters had a positive impact on reactor performance.
Article
Chemistry, Multidisciplinary
Aiman Ziout, Mohammed Alkahtani, Abd Elatty E. Abd Elgawad, Bashir Salah
Summary: This paper investigates the environmental benefits of remanufacturing, using window-mount air conditioner as a case study. The study adopts a life cycle assessment approach, and provides an authentic example for comparing the environmental burden of remanufacturing processes with the process of manufacturing new products.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Moh'd Al-Nimr, Saud A. Khashan, Hashem Al-Oqla
Summary: This paper presents three novel techniques to enhance Stirling engines (SE). The use of Phase-Change Material (PCM) regenerators instead of conventional regenerators improves the performance of both the regenerator and the engine. Replacing the plate receiver of a Solar-Dish Stirling engine (SDSE) with a glass receiver increases direct radiation absorption and reduces energy losses. Coupling an SDSE system with a PCM Thermal Storage Reservoir (PCMTSR) allows for the storage and extraction of rejected heat energy during the day and night, utilizing either ambient air or geothermal water for night-time engine cooling. Theoretical models evaluate the impact of these modifications on SE performance.
Article
Computer Science, Information Systems
Dinumol Varghese, Fadi Alnaimat, Bobby Mathew
Summary: This work presents a simulation-based study on the thermohydraulic characteristics of a MEMS heat sink using serpentine microchannels for thermal management of concentrated photovoltaic cells. The results show that the use of serpentine microchannels leads to lower thermal resistance and higher pumping power compared to straight microchannels. The study also reveals that an increase in Reynolds number leads to an increase in pumping power and a decrease in thermal resistance, regardless of the channel's geometry.
Article
Thermodynamics
Fadi Alnaimat, Khadije El Kadi, Bobby Mathew
Summary: In this paper, a steady-state analysis is conducted to investigate the condensation of R134a and propane (R290) inside a 0.5-mm square microchannel. A three-dimensional multiphase computational fluid dynamics (CFD) model based on Volume-of-fluid (VOF) approach is developed and validated. The results show different flow regimes transition during condensation and the increase of heat transfer coefficient with increasing mass flux, lower saturation-to-wall temperature difference, and higher inlet vapor quality. Propane is also found to be an environmentally friendly substitute with enhanced heat transfer coefficient compared to R134a.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Review
Engineering, Manufacturing
Asarudheen Abdudeen, Jaber E. Abu Qudeiri, Ansar Kareem, Anasmon Koderi Valappil
Summary: This study examines the most preferable additive manufacturing process and biomaterial used for orthopedic implants, particularly hip implants. The study evaluates the advantages and limitations of the chosen materials and manufacturing methods, as well as the biocompatibility and structural defects associated with using them. The review also assesses the current stage of topology optimization technique and concludes with future perspectives and directions for research.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2022)
Article
Green & Sustainable Science & Technology
Emad Abouel Nasr, Haitham A. Mahmoud, Mohammed A. El-Meligy, Emad Mahrous Awwad, Sachin Salunkhe, Vishal Naranje, R. Swarnalatha, Jaber E. Abu Qudeiri
Summary: This study presents the design and development of a photovoltaic thermal (PVT) collector and evaluates its electrical and electrical thermal efficiency. Two types of coolants, liquid and liquid-based MnO nanofluid, were used to enhance the system performance. Parametric investigations were conducted on clear and sunny days, examining electrical power generation, glazing surface temperature, electrical efficiency, and electrical thermal efficiency. The findings suggest that the MnO water nanofluid outperforms water nanofluid and stand-alone PV systems in photovoltaic energy conversion. The study covers three different domains: stand-alone PV, liquid-based PVT collector, and liquid-based MnO nanofluids.
Article
Thermodynamics
Anas Alkhazaleh, Fadi Alnaimat, Bobby Mathew
Summary: This work presents a liquid-based MEMS heat sink with straight microchannel integrating square pin-fins for cooling of microelectronic chips. The study evaluates the performance of the heat sink and the contribution of geometric features through simulations. The results show that the square pin-fins reduce thermal resistance and increase pumping power, with the size and pitch of the pin-fins impacting the performance. Additionally, the increase in hydraulic diameter decreases both pumping power and thermal resistance. Experimental data is generated to validate the model.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Computer Science, Information Systems
Alia Mohammed Shaker Alblooshi, Fadi Alnaimat, Bobby Mathew
Summary: This paper presents a mathematical model of a dielectrophoretic microdevice with planar corrugated electrodes for focusing micro-particles in a micro-scale flow passage. The model considers various phenomena influencing particle focusing and parametric study reveals the dependence of performance metrics on geometric and operating parameters. The model allows for determining desired performance metrics based on constraints and is validated using experimental data.
Proceedings Paper
Materials Science, Multidisciplinary
Sawsan Dagher, Ali Hilal-Alnaqbi, Saud Khashan, Anas Alazzam
Summary: This study introduces a high-performance microdevice that utilizes magnetic manipulation to capture and separate microparticles in continuous flow, demonstrating high efficiency and scalability of magnetic separation.
MATERIALS TODAY-PROCEEDINGS
(2021)
