Article
Chemistry, Physical
Zubair Ahmad, Sachin Kumar, Cuc Kim Trinh, Jae-Jin Shim, Jae-Suk Lee
Summary: A molecular-level-controlled polypyrrole/graphene oxide nanocomposite was synthesized using a predoped two-monomer-connected precursor (TMCP) and graphene oxide (GO). The resulting nanocomposite exhibited excellent electrochemical performance and cycling stability. The systematic investigation showed that various parameters, such as crystallinity, crystalline domain size, doping level, and electrical conductivity, could be well controlled using a specific concentration of the dopant and connector.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Sawaira, Mabkhoot Alsaiari, Mushtaq Ahmad, Mamoona Munir, Muhammad Zafar, Shazia Sultana, Sumreen Dawood, Abdulaziz Ibrahim Almohana, M. H. Al-Marzouki Hassan, Abdulrahman Faraj Alharbi, Zubair Ahmad
Summary: A novel green bismuth oxide nanocatalyst derived from plant extract was synthesized and applied for sustainable biofuel synthesis from Cannabis sativa seed oil. The synthesized biodiesel showed comparable fuel properties with internationally set parameters.
Review
Biochemistry & Molecular Biology
Santosh Kumar, Annapureddy Rama Linga Reddy, Indra Bhusan Basumatary, Anamika Nayak, Debjani Dutta, Jyotismita Konwar, Manashi Das Purkayastha, Avik Mukherjee
Summary: Perishable foods pose a challenge to food supply chains due to their short shelf-life and resulting postharvest losses. Pectin, a biopolymer derived from low-cost sources like agricultural or food processing wastes, has been extensively studied for its use in food packaging and preservation. This review provides a comprehensive account of pectin extraction, development of pectin-based films and coatings, their characterizations, and their applications in improving the shelf-life of perishable products.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Nazir Ahmad Mala, Mehraj Ud Din Rather, Raja Nisar Ali, Shahid Hussain, Sobhy M. Ibrahim, Nabi Ullah, Shahid Husain, Zubair Ahmad
Summary: In this study, Mo-Cu dual-doped NiO nanorods were prepared using the hydrothermal method. Characterization techniques including X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy were employed to study the nanorods. Electrochemical analysis revealed their pseudocapacitive nature and high specific capacitance under certain conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Chemistry, Physical
Shahid Alam, Fizza Fiaz, Muhammad Ishaq Khan, Muhammad Zahir Iqbal, Zubair Ahmad, Hosameldin Helmy Hegazy
Summary: This article introduces the great application prospects of 2D transitional metal carbides/nitrides (MXenes) in Supercapacitors (SCs). MXene, with its outstanding physiochemical merits, superior volumetric capacitance, metallic-like conductivity, multilayered structures, adjustable surface terminations, redox reaction active surfaces, and structural advantages, facilitates energy storage. The article discusses the synthesis of MXene and the different factors that play a crucial role in energy storing capability, as well as methods to enhance capacitance, energy density, and voltage window. It also focuses on the strategy of composite formation and electrolyte selection to enhance the performance of MXene-based composites. The article provides a comprehensive view of the current development and opportunities, serving as a roadmap for scientists to tailor electrochemical features of MXene-based composites for the latest generation of energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Nazir Ahmad Mala, Mohd Arif Dar, Mehraj Ud Din Rather, Bilal Ahmad Reshi, S. Sivakumar, Khalid Mujasam Batoo, Zubair Ahmad
Summary: In this research, pristine nickel oxide (NiO) and Mn-doped NiO nanoparticles (NPs) were synthesized using the chemical precipitation method. Characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR), UV-Visible diffuse reflectance spectroscopy, scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy/selected area electron diffraction (TEM/SAED), vibrating sample magnetometer, and cyclic voltammetry were used to analyze the properties of the NPs. The results showed that the NPs exhibited face-centered cubic structures with decreasing crystallite sizes. The presence of Mn ions led to a transition from weak ferromagnetism to superparamagnetism. Pristine NiO samples exhibited the highest capacitance of 555 F/g at a scan rate of 10 mV/s. These NiO and Mn-doped NiO NPs have potential applications in data storage and supercapacitors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohd Arif Dar, Sheikh Rizwan Ahmed, Mohd Aslam Rather, S. Kalpana, Aafaq A. Rather, S. Rafi Ahamed, Zubair Ahmad
Summary: In this article, orthorhombic SnSe nanoparticles with sheet and flower-like shapes are prepared through a hydrothermal method using Oleylamine and Ethylene glycol solvents. The cyclic voltammograms and Galvanostatic charge/discharge studies of AN-(OA) and AN-(EG) electrodes in KOH electrolyte are investigated. The specific capacitance values of AN-(EG) and AN-(OA) electrodes are calculated through CV curves and GCD curves, showing the morphology plays a critical role in the capacitive performance of NPs.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Indra Bhusan Basumatary, Avik Mukherjee, Santosh Kumar
Summary: Biopolymer-based food packaging films are gaining popularity as consumers demand sustainable alternatives and express concerns about synthetic plastic packaging. In this study, chitosan-based active antimicrobial films were created with the addition of eugenol nanoemulsion (EuNE), Aloe vera gel, and zinc oxide nanoparticles (ZnONPs). The films were characterized for solubility, microstructure, optical properties, antimicrobial, and antioxidant activities. The incorporation of EuNE improved the UV light barrier property of the films, while maintaining transparency. The addition of ZnONPs enhanced antibacterial properties and tensile strength, and the addition of EuNE and Aloe vera gel improved DPPH scavenging activities.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Mohd Arif Dar, S. Dinagaran, D. Govindarajan, S. Rafi Ahamed, Faiza Habib, C. Siva, Annasaheb Moholkar, Zubair Ahmad, Mudasir A. Yatoo
Summary: In this article, Mn-doped Snx-0MnxS nanoparticles were synthesized and characterized. The results showed that Mn doping improved the electrochemical properties of pure SnS NPs, making them a potential alternative for energy storage devices. The study also indicated the potential applications of these nanoparticles in data storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Muhammad Zahir Iqbal, Umer Aziz, Rida Zahid, Saikh Mohammad Wabaidur, Zubair Ahmad, Sikandar Aftab
Summary: Metal organic frameworks (MOFs) have demonstrated excellent electrochemical performance as active materials for energy storage applications, with high specific capacity, long-term cyclic stability, excellent energy densities, and rapid charging discharging rates. In this study, lithium and manganese based MOFs were synthesized using a 1, 3, 5 benzenetricarbxylic acid organic linker, and a hybrid device (battery-supercapacitor) was fabricated using manganese-MOF as the working electrode and activated carbon as the counter electrode. The device exhibited a specific capacity of 253 C g^(-1) at 1.0 A g^(-1), cyclic durability of 93% after 3000 GCD cycles, power density of 2560 W kg^(-1), and energy density of 59.92 Wh kg^(-1). Dunn's model was used to analyze the capacitive and diffusive currents, providing insights into the charge transfer mechanism. These impressive electrochemical outcomes highlight the potential of MOFs-based electrode materials for supercapattery applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Energy & Fuels
Mohd Arif Dar, S. Dinagaran, Khalid Mujasam Batoo, S. Rafi Ahamed, Sajjad Hussain, Zubair Ahmad, Jae-Jin Shim
Summary: In this study, pure and Ni-doped SnS nanoparticles were successfully synthesized using a simple and low-cost solvothermal method. The Ni-doped sample exhibited a flower-like morphology as shown in the SEM and TEM images. The supercapacitor performance of the electrodes was investigated using CV, GCD, and EIS measurements, revealing that the Ni-doped electrode had a higher specific capacitance, specific energy, and specific power compared to the pure SnS electrode. Moreover, the optimized Ni-doped electrode showed excellent cycling stability with a retention of 97% and a coulombic efficiency of 98% after 2000 cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Abdul Mateen, Zubair Ahmad, Salamat Ali, Najam Ul Hassan, Fahim Ahmed, Razan A. Alshgari, Mohammed Mushab, Sayed M. Eldin, Mohd Zahid Ansari, Muhammad Sufyan Javed, Kui-Qing Peng
Summary: MXenes show promise as a new 2D material for energy storage and conversion applications due to their excellent conductivity, accordion-like layered structure, surface chemistry, and organized nanochannels. In this work, a V2CTx@Si nanocomposite electrode material was developed for supercapacitors, utilizing silicon nanospheres as spacers to increase ion transport channels and improve performance. The V2CTx@Si//Zn zinc-ion supercapacitor exhibited a high capacitance, wide potential range, and long cyclic life.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Zahir Iqbal, Misbah Shaheen, Ahmad A. Ifseisi, Sikandar Aftab, Zubair Ahmad, Sajid Hussain Siyal, Muhammad Javaid Iqbal
Summary: This study enhances the energy storage performance of tungsten disulfide (WS2) by introducing a conductive interfacial layer of Ag between the substrate and active material. The Ag-WS2//AC devices achieved a specific capacity (Q(s)) of 224 C g(-1), with maximum specific energy (E-s) and specific power (P-s) of 50 W h kg(-1) and 4003 W kg(-1), respectively. The device was stable, retaining 89% capacity and 97% coulombic efficiency after 1000 cycles. Capacitive and diffusive currents were analyzed to observe the charging phenomenon at each scan rate using Dunn's model.
Review
Materials Science, Multidisciplinary
Mudasir A. Yatoo, Faiza Habib, Akhtar Hussain Malik, Mohsin Jahan Qazi, Sharique Ahmad, Mohd Azhardin Ganayee, Zubair Ahmad
Summary: Solid-oxide fuel cells, composed of a solid electrolyte, cathode, and anode, are efficient devices for converting chemical to electrical energy. Researchers have extensively worked on material development for these components, and this review article discusses the requirements and prominent materials families explored by the scientific community. Given the increasing need for greener energy alternatives and the substantial literature generated on materials development for solid-oxide fuel cells, a brief review article dedicated to this topic would be valuable for the scientific community, especially for new researchers entering the field.
MRS COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Wajeeha Wazir, Zubair Ahmad, Sonia Zulfiqar, Eric W. Cochran, Shamroza Mubarik, Tehmina Kousar, H. H. Somaily, Jae-Jin Shim, Hessa A. Alsalmah, Muhammad Aadil
Summary: This study involves the synthesis of silver-doped nickel oxide nanocatalyst using a wet-chemical method and surfactant support. The Ag-doped nickel oxide exhibited enhanced photocatalytic activity for the degradation of crystal violet dye under W-light exposure. The presence of silver dopant reduced the band gap energy and mitigated electron-hole recombination, improving the absorption of light and efficiency of photocatalysis. The study proposes a novel approach to enhance the photocatalytic capabilities of basic ceramic materials, making it promising for environmental remediation.
CERAMICS INTERNATIONAL
(2023)
