Article
Chemistry, Multidisciplinary
Jiri Henych, Petr Ryanek, Martin St'astny, Zuzana Nemckova, Slavomir Adamec, Martin Kormunda, Simona Kaminkova, Katerina Hamalova, Jakub Tolasz, Pavel Janos
Summary: Two types of CeO2 nanoparticles (CeNPs) were successfully immobilized in electrospun PA6 nanofibers using a low-temperature precipitation method in water. The colloidal solutions of CeNPs were directly mixed with the polymer solution before the electrospinning process, resulting in good dispersion of CeNPs in the nanofibers. The immobilized CeNPs showed strong catalytic activity in dephosphorylation, as demonstrated by the hydrolytic cleavage of phosphodiester molecules and the ability to cleave different types of P-O bonds.
Article
Nanoscience & Nanotechnology
Xue Wang, Huanxin Guo, Zonghao Lu, Xue Liu, Xiongfei Luo, Shujun Li, Shouxin Liu, Jian Li, Yongzhen Wu, Zhijun Chen
Summary: The study developed a multifunctional dopant utilizing lignin's fluorescence and self-assembly properties, creating optical films with haze, fluorescence, and room-temperature phosphorescence. These films enhanced the light-harvesting efficiency of solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Begona Sellers-Anton, Esther Bailon-Garcia, Arantxa Davo-Quinonero, Dolores Lozano-Castello, Agustin Bueno-Lopez
Summary: A Ce(0.5)Pr(0.5)Ox soot combustion catalyst with both high activity and thermal stability has been developed by combining Ce(0.5)Pr(0.5)Ox nanoparticles and MS-macroporous structures. The hybrid catalyst showed a significant decrease in soot combustion temperature compared to the uncatalyzed reaction, and the thermal aging only slightly affected its performance. The Ce(0.5)Pr(0.5)Ox nanoparticles provided high activity, while the MS structure improved the contact between the catalyst and soot particles.
APPLIED SURFACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Mohammad Ali Haghighat Bayan, Faramarz Afshar Taromi, Massimiliano Lanzi, Filippo Pierini
Summary: Introducing hollow core polyaniline (PANI) nanofibers as a buffer layer can improve the power conversion efficiency of polymer solar cells (PSCs) with higher open-circuit voltage and power conversion efficiency.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Wen-Jeng Ho, Jheng-Jie Liu, Jhih-Ciang Chen
Summary: This study investigated the plasmonic effects of silver nanoparticles, the luminescent down-shifting of Eu-doped phosphor particles, and metal-enhanced fluorescence. By combining these processes, the conversion efficiency of silicon solar cells was significantly enhanced.
Editorial Material
Chemistry, Physical
Hong Zhang, Wallace C. H. Choy
Summary: In this study, the surface properties of low-temperature processed NiOx nanocrystal film were reconstructed by tailoring a self-assembled monolayer. A record power conversion efficiency of 24.4% was achieved in flexible solar cells using an all-perovskite tandem structure.
Article
Chemistry, Physical
Puning Ren, Zhuyan Gao, Tiziano Montini, Zhitong Zha, Na Ta, Yike Huan, Nengchao Luo, Emiliano Fonda, Paolo Fornasiero, Feng Wang
Summary: Biomass reforming using solar energy allows for the production of green hydrogen. Current biomass photoreforming inefficiently produces hydrogen due to intermittent solar light and incomplete degradation of biomass C-C bonds. This study overcomes these issues by converting carbohydrates into liquid hydrogen carriers (LHCs) suitable for transportation. The LHCs are then fully decomposed, releasing only H2 and CO2. By prioritizing complete scission of carbohydrate C-C bonds, this process yields 44 g of H2 per kg of glucose. This work demonstrates the production and storage of hydrogen through the complete breakdown of biomass C-C bonds.
Article
Energy & Fuels
Arash Badakhsh, Hizkia Manuel Vieri, Hyuntae Sohn, Sung Pil Yoon, Sun Hee Choi
Summary: Ammonia (NH3) is a promising alternative to hydrogen in the energy sector due to its carbon-free nature and high hydrogen content. However, current NH3 synthesis processes consume a significant amount of energy and contribute to CO2 emissions. To improve efficiency, new catalysts are needed for NH3 synthesis under milder conditions. In this study, we developed a Ru supported on perovskite catalyst using a ball-milling-assisted exsolution method. The catalyst showed tunable morphology and better resistance to deactivation mechanisms compared to the conventional impregnated catalyst.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
L. R. . Padilla, N. Stojilovic, M. Grujic-Brojcin, M. Sepanovic, N. Tomic, B. Simovic, G. R. Potratz, G. Gopalakrishnan
Summary: Non-woven fibers containing cerium and zinc titanates were prepared using sol-gel and electrospinning methods. The fibers were characterized by various techniques and the results showed the presence of ceria fluorite nanocrystals and zinc oxide wurtzite phase at different temperatures. The nanofibers exhibited an increase in ceria nanocrystallite size with increasing calcination temperature, while the BET specific surface area decreased with higher temperatures. These fibers have potential applications in photocatalysis.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Analytical
Wendi Lv, Xiaoying Yuan, Chenglu Yan, Qiuting Ma, Bing Wang, Juan Du, Baozhan Zheng, Dan Xiao
Summary: In this study, Eu3+-doped nanoceria with self-integrated catalytic and luminescence sensing functions was synthesized to build a dual-readout nanozyme platform for organophosphate compound sensing. The platform successfully demonstrated the detection of organic phosphorus compounds such as p-NPP and EPN.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Physical
Yichuan Chen, Yuqing Cheng, Mengtao Sun
Summary: The electric field of the PT:IC(60)BA donor-acceptor system can be significantly enhanced by using the plasmon-enhanced method, with the electron-hole generation rate boosted and photocurrent enhanced around 230 times by surface plasmon resonance. However, the band gap and open-circuit voltage decrease with the increase of temperature, affecting the performance of organic solar cells.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Textiles
Ye Liu, Jian Xiong, Ailin Li, Rongwu Wang, Liming Wang, Xiaohong Qin
Summary: Interfacial solar vapor generation using electrospun nanofiber membranes decorated with plasmonic silver nanoparticles shows high efficiency in light absorption and water evaporation. By optimizing the size of silver nanoparticles and their light-absorption ability, the Ag@PAN nanofiber membrane demonstrates excellent performance in solar vapor generation with long-term stability after multiple cycle tests. This research provides a pathway for the development of high-performance interfacial solar vapor generators.
TEXTILE RESEARCH JOURNAL
(2021)
Article
Materials Science, Ceramics
Kandasamy Saravanakumar, Anbazhagan Sathiyaseelan, Arokia Vijaya Anand Mariadoss, Myeong-Hyeon Wang
Summary: This study synthesized ceria oxide nanoparticles (CeO2 NPs) using plant extract and investigated their antioxidant and antidiabetic activities. The CeO2 NPs exhibited non-toxicity in cells and showed potential therapeutic effects in combating oxidative stress and diabetes. The findings suggest a promising avenue for further research on the regulation of glucose metabolism by CeO2 NPs for diabetes treatment.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Bo Sun, Wenge Chen, Wei Zheng, Hui Zhang, Terence Xiaoteng Liu, Ahmed Elmarakbi, YongQing Fu
Summary: In this study, a green approach using hydrothermal calcination processes was reported to in-situ grow CeO2 nanoparticles onto reduced graphene oxide (rGO) surfaces. The CeO2 nanoparticles exhibited ultrafine crystalline sizes, homogeneous dispersion, and controlled oxygen-vacancy, leading to superior photocatalytic performance and enhanced adsorption capability. The degradation rate of the composite for rhodamine B reached 94.7% within 120 min, and after five cycles, the degradation rate was still maintained at 87.2%, demonstrating good stability and reusability.
JOURNAL OF CATALYSIS
(2023)
Article
Thermodynamics
Haodong Huang, Meng Lin
Summary: Solar thermochemical water splitting is an efficient method to convert solar energy into renewable fuels. This study developed a multi-physical model to analyze the dynamic behavior of the reactor under varying solar irradiations. Two control strategies were proposed to alleviate the negative effect of decreased direct normal irradiation (DNI) on the reactor efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Optics
Ali Hajjiah, Roanne Ibrahim, Nihal Ibrahim, Mohammed Gamal, Sara A. A. Elrafay, Nader Shehata, Ishac Kandas
Summary: This paper analytically studies the development of up-conversion efficiency through the addition of silver nano structures in erbium-doped-NaYF4. The results show that silver nanorods result in a higher efficiency improvement compared to the addition of nanoparticles.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Z. A. Alrowaili, M. Aouassa, M. H. Mahmoud, Karam S. El-Nasser, Hussein A. Elsayed, T. A. Taha, Ashour M. Ahmed, Ali Hajjiah, Ahmed Mehaney
Summary: A novel and highly sensitive phononic crystal (PnC) sensor was developed for detecting low concentrations (ppm scale) of CdBr2, a highly toxic heavy metal ion in fresh- water. The sensor consists of two thin rubber layers covering a one-dimensional ternary porous silicon (PSi) PnC structure. The presence of the rubber layers leads to the appearance of local resonant modes, which are significantly affected by filling the PSi layers with CdBr2 ions. This sensor design shows promising values of sensitivity, quality factor, detection limit, and damping rate, making it suitable for liquid sensing and bio-sensing applications.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Physics, Condensed Matter
Ali Hajjiah
Summary: This study investigates the heat generation in CZTSSe/CdS kesterite thin film solar cells through interface recombination. The results show that the interface defects and the surface recombination velocity significantly affect the heat generation rate. It highlights the importance of interface quality and interface engineering strategies for improving the thermal stability of solar cells.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Engineering, Electrical & Electronic
Ali Hajjiah, Aliaa Hajiah
Summary: Thermal stability is crucial for scaling up and commercialization of third-generation photovoltaic devices. This study investigated the heat generation from trap-assisted tunneling recombination (TATR) in CZTSSe Kesterite thin-film solar cells. The heat generation from TATR was found to be higher than that from non-radiative SRH recombination, especially for the Cu-Sn defect.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Farhad Javanpour Heravi, Hussein A. Elsayed, Ali Hajjiah, Ahmed Mehaney
Summary: In this study, an ultra-sensitive resonant phononic crystal structure is proposed as a chemical and fluidic sensor to identify dangerous metallic oxides. The sensor design consists of a solid crystal with a central defect filled with the targeted oxide solutions. Optimization of the structure type, layer thickness, unit cell number, and incident angle allows for specific acoustic properties and resonance peaks for each metallic oxide. The results show that the proposed sensor structure has potential for a wide range of applications in various fluids and environmental pollutions.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ali Hajjiah
Summary: This study systematically investigates the heat generation in CZTSSe thin film solar cells and the impact of elevated temperature and defects on the generation of Joule heat. It is found that both high temperature and defects can enhance the generation of Joule heat, leading to accelerated deterioration of device parameters and decomposition of materials and interfaces. The investigation of heat generation in thin film solar cells under operating or stressing conditions is rarely explored in literature.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Analytical
Catherine Nayer Tadros, Nader Shehata, Bassem Mokhtar
Summary: Wireless Sensor Networks (WSNs) have been used in various applications for environmental pollution monitoring, such as water quality monitoring. To improve the efficiency and accuracy of this process, lightweight machine learning technologies are integrated. Energy-efficient clustering protocols, like the low-energy adaptive clustering hierarchy (LEACH) protocol, are introduced to overcome the limitations of WSNs. In this study, a modified LEACH-based clustering algorithm in conjunction with a K-means data clustering approach is proposed for efficient decision making in water quality monitoring.
Article
Chemistry, Analytical
Bassem Mokhtar, Ishac Kandas, Mohammed Gamal, Nada Omran, Ahmed H. Hassanin, Nader Shehata
Summary: This paper introduces the advancements in nanotechnology and the use of nanomaterials to fabricate stretchy piezoelectric nanofibers for energy harvesting. These nanofibers can power bio-nanosensors through mechanical movements of the body, such as arm movements, joint movements, and heartbeats. By using these nano-enriched bio-nanosensors, a self-powered wireless body area network (SpWBAN) can be created for sustainable health monitoring services. The paper also presents a system model for an SpWBAN with an energy harvesting-based medium access control protocol and analyzes its performance based on fabricated nanofibers with specific characteristics. Simulation results show that the SpWBAN outperforms contemporary WBAN designs without self-powering capability and has a longer lifetime.
Article
Energy & Fuels
Tamara Merckx, Aranzazu Aguirre, Yinghuan Kuang, Arvid van der Heide, Ali Hajjiah, Yaser Abdulraheem, Anurag Krishna, Jef Poortmans, Tom Aernouts
Summary: We demonstrate the scaling up of perovskite photovoltaic technology with minimal performance losses by developing stable device architecture with industrially compatible processes. The monofacial (aperture area: 784 cm(2)) and bifacial (aperture area: 781 cm(2)) perovskite solar modules exhibit a power conversion efficiency of 13.1% and 11.9%, respectively. Moreover, the encapsulated bifacial mini-modules (aperture area: 4 cm(2)) retained around 92% of initial PCE after 1000 h of damp heat test.
IEEE JOURNAL OF PHOTOVOLTAICS
(2023)
Article
Materials Science, Multidisciplinary
Bao Le, Nada Omran, Ahmed H. Hassanin, Ishac Kandas, Mohammed Gamal, Nader Shehata, Islam Shyha
Summary: In this study, a novel flexible piezoelectric membrane based on PVDF/TPU nanofibers was produced using solution blow spinning (SBS). The addition of TPU increased the flexibility, tensile strength, and elasticity of the membranes, resulting in high piezoelectric response and sensitivity. This work provides a promising method to produce high elastic-piezoelectric nanofibrous membranes using SBS.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Biochemistry & Molecular Biology
Nagwa A. Elbhnsawi, Bassma H. Elwakil, Ahmed H. Hassanin, Nader Shehata, Salma Sameh Elshewemi, Mohamed Hagar, Zakia A. Olama
Summary: The present study aimed to enhance the antimicrobial activity of Eucalyptus oil by encapsulating it in a nano-drug carrier, and investigated the wound healing properties of the synthesized nano-chitosan/Eucalyptus oil/cellulose acetate nanofibers in vitro and in vivo. The results demonstrated that encapsulated Eucalyptus oil showed significantly enhanced antimicrobial activity. The nano-chitosan/Eucalyptus oil/cellulose acetate nanofibers exhibited homogenous fibers with thin diameter and high antimicrobial activity.
Article
Chemistry, Physical
Abdulkarem H. M. Almawgani, Walied Sabra, Ali Hajjiah, Hussein A. Elsayed, Ahmed Mehaney, Ghassan Ahmed Ali, Yahya Ali Abdelrahman Ali, Wael S. Mohamed, Ashour M. Ahmed
Summary: This paper conducts a theoretical comparison between different configurations of surface plasmon resonance (SPR) biosensors to improve their performance. The proposed biosensor designs utilize zirconium nitride (ZrN) as an alternative plasmonic material and incorporate various perovskite materials in the visible region. The numerical findings suggest that the [Prism/BaTiO3/ZrN/BaTiO3/Biosensing medium] configuration demonstrates the highest sensitivity and minimum reflectivity values, making it the most promising SPR biosensor design.
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
(2023)
Article
Physics, Multidisciplinary
Ali Hajjiah
Summary: In this study, an optical model was developed to analyze the optical loss in antimony chalcogenide thin film solar cells. It was found that Sb2Se3 solar cells have better conversion performance and TCO layers have higher transmission rates.
Article
Chemistry, Multidisciplinary
Abdulkarem H. M. Almawgani, Ahmad Alzahrani, Ali Hajjiah, Ahmed Mehaney, Hussein A. Elsayed, Hassan Sayed
Summary: This paper introduces a novel design of a thin-film solar cell based on CZTS and ZnO composite materials, with optimized thicknesses of ITO and ZnO and a texture-designed anti-reflective coating to enhance the optical absorption of the cell at visible wavelengths. The study demonstrates the enormous potential of this design for manufacturing effective solar cells.
Article
Materials Science, Multidisciplinary
Ali Hajjiah
Summary: This study investigates the thermal degradation of Kesterite thin film solar cells using three different time dependent models. The results show that the heat generation is stronger in the model with linear relation between defect generation and electron and hole density increment, and increases with longer stressing time.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
