Article
Chemistry, Physical
Yuanfei Ai, Shu-Chi Wu, Fan Zhang, Xiaowei Zhang, Renjie Li, Yingying Lan, Lejuan Cai, Wenlong Wang
Summary: This study explores the factors affecting the performance of aluminum-sulfur batteries and improves the performance by adjusting the voltage window and developing catalyst materials. The results show that the catalyst effectively suppresses the shuttle effect of polysulfides and promotes the redox reaction of sulfides.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Min Chen, Gaige Zhang, Binhong Wu, Mingzhu Liu, Jiakun Chen, Wenjin Xiang, Weishan Li
Summary: In this study, a highly conductive electrode was constructed by wrapping lithium-rich layered oxides in a nitrogen-doped graphene carbon matrix. The experimental results showed that this electrode exhibited superior electrochemical performance and effectively addressed the capacity fading and voltage decay issues of lithium-rich layered oxides.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaopeng Li, Xingyu Du, Yulin Xu, Jianming Li, Yujue Wang, Yan Meng, Dan Xiao
Summary: A three-dimensional holey graphene enwrapped Li3V2(PO4)(3)/N-doped carbon nanocomposite was successfully synthesized, which exhibited excellent electrochemical performance and showed potential for application in Li-ion batteries.
Review
Chemistry, Multidisciplinary
Vijay Kumar Srivastava, Stefanos Mourdikoudis, Jalal Azadmanjiri, Parshant Kumar, Zdenek Sofer
Summary: The present Highlight paper summarises the reported works on the effect of sulfur and nitrogen doping on graphene nanoplatelets for high capacity electrodes in solid-state rechargeable energy storage devices. Lithium-ion batteries provide high power density but are limited by the low electrical conductivity of the anode materials. By designing high-power and stable structures, the capacity and kinetic balance between the anode and cathode can be increased. Graphene nanoplatelets have been widely studied as anode materials due to their unique structure and outstanding electrochemical properties.
Article
Chemistry, Physical
Xiyun Yang, Jiamin Liu, Fulu Chu, Jie Lei, Feixiang Wu
Summary: In this study, nanosized MoxC electrocatalysts embedded on N-doped graphene were synthesized for separator modification of Li-S batteries. The N-doped graphene acted as a conductive barrier layer and absorbed polysulfides, while MoxC nanoparticles facilitated the redox kinetics. The Li-S coin cells with MoxC@N-rGO-modified separator exhibited good cycling stability and excellent rate performance.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Nurzhan Baikalov, Islam Rakhimbek, Aishuak Konarov, Almagul Mentbayeva, Yongguang Zhang, Zhumabay Bakenov
Summary: Despite being the most theoretically efficient and cost-effective rechargeable batteries, lithium-sulfur batteries face challenges due to the low conductivity of sulfur and the polysulfide shuttle effect. This study focuses on modifying the separator of Li-S batteries with Ni nanoparticles encapsulated in nitrogen-doped graphene supported by nitrogen-doped graphitic carbon (Ni@NGC) to improve their performance. By controlling the loading of Ni, the surface area-to-metal content ratio can be adjusted to influence the reaction kinetics and cycling performance of Li-S cells.
Article
Chemistry, Multidisciplinary
Hui Li, Hanxi Yang, Xinping Ai
Summary: Lithium-sulfur (Li-S) batteries have been intensively investigated as a post-Li-ion technology, but their energy density and cycling performance are still not satisfactory for commercial development. The gap between laboratory research and industrial application is mainly due to the different requirements of sulfur cathodes and electrolytes in practical batteries. The quasi-solid-state reaction mechanism holds promise for achieving high-capacity and cycle-stable sulfur cathodes.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lijing Han, Jing Tang, Rong Yang, Qiaohua Wei, Mingdeng Wei
Summary: This study successfully synthesized Ge/N-doped carbon microspheres with excellent rate performance, reversible capacity, and cycling stability, which are suitable for use as an anode material for lithium-ion batteries.
Article
Physics, Applied
Shanlin Li, Houshan Mei, Yixin Song, Jun Zhang, Xianghong Liu
Summary: Transition metal modified carbon materials hold great potential in Li-S batteries, and optimizing the electronic interaction between metal and carbon support is crucial. In this study, a unique double G/N-carbon layer structure of G/FeCo@N-C was prepared, and the mechanism of capacity attenuation was explained using in situ Raman spectroscopy.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Taewoong Lee, Seongwook Chae, Jin Hong Lee, Seung Geol Lee
Summary: This study develops nitrogen and sulfur dual-doped porous carbonaceous materials derived from sulfur black dye through a sustainable and facile mechanochemical process. These materials exhibit high rate capability and good cycle performance as anode materials for both lithium-ion batteries and sodium-ion batteries. The enhanced electrochemical performance is attributed to the nitrogen and sulfur dual-doped porous microstructure, which provides additional active sites and enhances the electrochemical kinetics.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Jinbo Hao, Feng Wei, Xinhui Zhang, Long Li, Changcheng Chen, Ge Wu, Liyuan Wu, Dan Liang, Xiaoguang Ma, Pengfei Lu, Haizhi Song
Summary: By utilizing first principles calculations, Li-decorated N-doped PG was identified as a promising material for hydrogen storage, with a maximum hydrogen gravimetric density of 7.88 wt%. The study provides valuable insights into the potential of Li-decorated N-doped PG as an efficient hydrogen storage material.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yongseok Lee, Jungmin Kang, Jinho Ahn, Wonseok Ko, Hyunyoung Park, Seokjin Lee, Sangyeop Lee, Jung-Keun Yoo, Jongsoon Kim
Summary: In this study, the conversion properties of Cu(PO3)(2) as a cathode material for Li rechargeable batteries were enhanced through amorpholization and carbon-mixing. The amorphorized Cu(PO3)(2)/C composite exhibited higher reversible capacity and average operation voltage compared to crystalline Cu(PO3)(2)/C composites. The excellent power capability and cyclability of the amorphorized Cu(PO3)(2)/C composite were attributed to the enhanced kinetics of the conversion reaction in Cu(PO3)(2). The reversible conversion-reaction mechanism of Cu(PO3)(2) in a Li-cell system was also demonstrated through various experimental measurements.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Zan Huang, Peifang Luo, Honghong Zheng, Zhaochun Lyu
Summary: A sulfur-doped graphene modified Li4Ti5O12@C nanocomposite (SG-T@C) was successfully fabricated via a sol-gel method assisted with solid-state route. The composite showed homogeneously dispersed Li4Ti5O12@C nanocrystals and the introduced sulfur-doped graphene acted as a conductive bridge, improving the electrical conductivity. The SG-T@C exhibited excellent high-rate performance and cycling stability, making it a promising electrode material for lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Multidisciplinary
Zhiming Zhao, Husam N. Alshareef
Summary: This review provides an extensive overview of the current status and future prospects of sustainable dual-ion batteries beyond Li-ion. These new batteries utilize abundant and low-cost cations, holding significant promise for large-scale energy storage solutions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xu Han, Zeyun Zhang, Xuefei Xu
Summary: In this study, density functional theory was used to investigate the performance of single metal atom catalysts embedded in nitrogen-doped defective graphene for fast kinetics in Li-S batteries. Evaluation criteria were established to guide catalyst screening, and it was found that the nitrogen coordination environment and sulfur-metal interactions play critical roles in catalytic performance. Moreover, a novel screening strategy was proposed to predict the catalytic activity of single metal atom catalysts supported on nitrogen-doped graphene.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Food Science & Technology
D. Tawalbeh, W. A. N. Wan Ahmad, N. M. Sarbon
Summary: Ultrasound pretreatment has positive effects on the functional and bioactive properties of legumes protein hydrolysates and peptides, enhancing their solubility, antioxidant activity, and antihypertensive effects.
FOOD REVIEWS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Yi Xu, Waqas Ahmad, Md Mehedi Hassan, Huanhuan Li, Qin Ouyang, Quansheng Chen
Summary: A novel g-C3N4 nanosheets-assisted upconversion fluorescent aptasensor was developed for Staphylococcus aureus detection using hybridization chain reaction (HCR). The presence of S. aureus activated the HCR system and resulted in a decrease in peroxidase-like activity of g-C3N4 nanosheets and fluorescence recovery proportional to the concentration of S. aureus. The method showed acceptable recoveries in real food samples and was validated by a traditional plate counting method.
ANALYTICA CHIMICA ACTA
(2023)
Letter
Peripheral Vascular Disease
Menhas Ahmad, Waqas Ahmad, Satesh Kumar
Article
Biophysics
Huanhuan Li, Wenhui Geng, Zhixiong Qi, Waqas Ahmad, Quansheng Chen
Summary: A stimuli-responsive SERS biosensor was developed for tetracycline detection using EDTA-driven polyethyleneimine grafted calcium carbonate microcapsules and chitosan-Fe magnetic microbeads. The biosensor showed high sensitivity and stability, with a linear relationship established and a LOD of 0.03 ng/mL. The biosensor's application in detecting tetracycline in food matrices was also validated and yielded consistent results with the standard ELISA method. This SERS biosensor offers promising prospects for tetracycline detection.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Analytical
Baoning Wang, Waqas Ahmad, Quansheng Chen, Qin Ouyang
Summary: A sensitive fluorescence nanosensor was developed for the detection of nitrite in pickled meat products, offering rapid detection and low detection limits.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Review
Chemistry, Multidisciplinary
Waqas Ahmad, Jiang Wu, Qiandong Zhuang, Arup Neogi, Zhiming Wang
Summary: This review presents the latest developments in fabricating broadband photodetectors based on conventional 2D transition metal dichalcogenides (TMDCs). It focuses on the recent progress in group-10 TMDCs in terms of lattice structure and synthesis techniques. The review also discusses the applications of group-10 TMDCs in nanoelectronics and optoelectronics, and provides perspectives for next-generation broadband photodetectors.
Article
Energy & Fuels
Shammas Mushtaq, Sofia Tahir, Arslan Ashfaq, Ruy Sebastian Bonilla, Muhammad Haneef, Rabia Saeed, Waqas Ahmad, Nasir Amin
Summary: This study reports a modeling-guided device optimization process to design highly efficient lead-free n-i-p methyl ammonium tin bromide (MASnBr3) perovskite solar cells. The influence of different parameters on the performance of MASnBr3 devices is thoroughly investigated using numerical simulations. An optimized device structure is proposed, showing the potential of MASnBr3 as a nontoxic perovskite for renewable energy.
Article
Chemistry, Applied
Xiaodan Ding, Waqas Ahmad, Jizhong Wu, Yawen Rong, Qin Ouyang, Quansheng Chen
Summary: An ultrasensitive detection strategy for ciprofloxacin (CIP) has been developed using copper ions-induced charge transfer in poly acrylic acid (PAA) functionalized upconversion nanoparticles (UCNPs)/2,2-bipyridine (bipy) system. Copper ions adhere to the surface of PAA-UCNPs, deactivating fluorescence, while bipy controls aggregation. CIP coordinates with the bipy-Cu complex, causing the release of trapped fluorescence. The method shows a good calibration plot (0.05-1000 ng/mL) and a detection limit of 0.13 ng/mL.
Article
Chemistry, Applied
W. Ahmad, E. H. Aljuhani, H. Alwael, E. A. Assirey, H. M. Nassef, M. S. El-Shahawi
Summary: The electrochemical behavior and adsorption properties of food colorant erythrosine b (E127) were investigated and a sensitive analysis method was developed. The energy levels, absorption, and redox potentials of E127 were determined using computational methods. Experimental results validated the proposed redox mechanism and allowed for the detection of E127 in various samples.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Chemistry, Analytical
Waqas Ahmad, Li Wang, Muhammad Zareef, Quansheng Chen
Summary: A highly structured fluorometric bioassay utilizing upconversion nanoparticles and a dark receptor has been developed for screening Staphylococcus aureus. The assay relies on the energy transfer between donor-labeled nanoparticles and a receptor molecule, resulting in fluorescence activation upon target detection. The assay demonstrated excellent sensitivity and accuracy in detecting S. aureus in various samples. This method offers a fast and precise screening approach for S. aureus in food and environmental settings.
Review
Nanoscience & Nanotechnology
Farzana Jamal, Aqsa Rafique, Sawaira Moeen, Junaid Haider, Walid Nabgan, Ali Haider, Muhammad Imran, Ghazanfar Nazir, Mansur Alhassan, Muhammad Ikram, Qasim Khan, Ghafar Ali, Maaz Khan, Waqas Ahmad, Muhammad Maqbool
Summary: The rapid development of population, industry, and urbanization has led to significant issues such as energy consumption and water contamination. Advanced materials are needed to address these problems and develop energy storage devices. Metal sulfides (MSs) nanomaterials have shown potential for applications in medicine, biology, environmental sciences, and energy production/utilization. This review summarizes the current achievements in MSs research and their production methods to achieve controlled morphologies, sizes, and compositions.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Waqas Ahmad, Muhammad Munsif, Habib Ullah, Mohib Ullah, Alhanouf Abdulrahman Alsuwailem, Abdul Khader Jilani Saudagar, Khan Muhammad, Muhammad Sajjad
Summary: The recognition of different activities in sports, especially cricket, has gained attention in recent years. Existing methods in this area often rely on hand-crafted features due to limited availability of public data. In this study, a cricket activities dataset and a deep learning model combining CNN layers and LSTM cells were proposed. The results show that the proposed model outperforms other recurrent neural networks and achieves high accuracy, recall, and F1 score. The code and dataset are publicly available for further research.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Waqas Ahmad, Sajid Ullah, Imtiaz Ahmad, Taj Muhammad, Yu Shuang Ren, Muhammad Ilyas
Summary: This article describes the synthesis of graphene oxide (GO) from fish scales and its application for removing organic contaminants from refinery wastewater. Characterization using XRD, FTIR, SEM, and EDX analysis showed that the synthesized GO had a consistent structure. The GO exhibited a rough, porous, and layered morphology similar to two-dimensional sheets of GO. The adsorption process of the adsorbent followed a pseudo-2nd order kinetic model and maintained high efficiency over multiple cycles.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Waqas Ahmad, Hikmat Ullah Khan, Tassawar Iqbal, Saqib Iqbal
Summary: Sentiment analysis is a popular research field in the current era due to its wide range of applications. This study proposes an Attention-based Multi-Channel Gated Recurrent Neural Network (Att-MC-GRU) for aspect extraction and sentiment classification. The method combines word embedding, part of speech tags, and contextual position information, and achieves higher accuracy compared to existing techniques.
Article
Pharmacology & Pharmacy
Feras Falih, Habibah A. Wahab, Waqas Ahmad
Summary: The aim of this study was to investigate the effects of formulation parameters on the physicochemical characteristics of quercetin-loaded polymeric nanoparticles. The results showed that the amount of polymer had the greatest impact on the particle characteristics, while the pluronic F-68 concentration had the greatest impact on PDI and zeta potential.
JOURNAL OF POPULATION THERAPEUTICS AND CLINICAL PHARMACOLOGY
(2023)
