Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Yasser T. Alharbi, Andrew Guy Thomas, Suliman A. Alderhami, Laila Almanqur
Summary: This study focuses on Er2S3:Al2S3:NiS2 thin films prepared using diethyldithiocarbamate. The thin films have a crystallite size of 37 nm and exhibit geometrically shaped, small clustered bodies. XPS analysis confirms the presence of core level peaks corresponding to Er4d, Al2p, Ni2p, and S2p in the material and a band gap energy of 2.7 eV. Electrochemical testing demonstrates excellent performance with a specific capacitance of 879 Fg(-1). The thin films also exhibit satisfactory cycle stability and show promising potential for diverse technological applications such as energy storage and photocatalysis.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Ruby Garg, Alpana Agarwal, Mohit Agarwal
Summary: This paper focuses on the synthesis of low-cost one-dimensional copper sulfide (Cu2S) electrodes for high-performance supercapacitors, showcasing the highest capacitance in Cu2S with a "1:1" ratio on a glass substrate. Additionally, the successful fabrication of supercapacitors on a flexible polypropylene (PP) substrate is discussed for the first time.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
J. J. Rushmittha, S. Radhika, C. M. Padma
Summary: A new nanocomposite of zirconium oxide supported copper ferrite (ZCFO) at different concentrations was synthesized using the co-precipitation technique. The XRD technique revealed a grain size of 60-70 nm for the sample. VSM analysis confirmed the ferromagnetic behavior of the NCs with a multi-domain nature. CV analysis showed that the synthesized sample exhibited a maximum specific capacitance of 790.87 F/g at a scan rate of 10 mV/s for ZCFO-1. GCD analysis demonstrated faradic behavior with prolonged discharge time even at higher current density, and cyclic stability analysis revealed a capacitive retention of 90.4% for ZCFO-1 over 2000 charge-discharge cycles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Sobhy M. Ibrahim
Summary: A novel hybrid Barium-Iron sulphide combined with graphene oxide (Ba4Fe2S6-GO) thin film was prepared, showing enhanced electrical and photocatalytic properties. Characterization revealed small band gaps and excellent energy storage capacity of the thin film.
Article
Energy & Fuels
S. Ezhil Arasi, R. Ranjithkumar, P. Devendran, M. Krishnakumar, A. Arivarasan
Summary: The study reported the supercapacitive behavior of chemically synthesized cobalt vanadate nanostructures. Crystallographic information and optical response were investigated through various analytical techniques. The prepared Co3V2O8 showed specific capacitance value of about 790 F/g at 1 A/g current density and 90.1% capacitive retention after 10000 cycles, indicating its potential as an electrode material for future energy storage devices.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
M. Isacfranklin, B. Jansi Rani, P. Senthil Kumar, R. Yuvakkumar, G. Ravi, A. Manigandan, M. Thambidurai, Cuong Dang, Dhayalan Velauthapillai
Summary: This study focuses on the preparation of electrodes for energy storage and water-splitting using the co-precipitation technique. Cyclic voltammetry and galvanostatic charge-discharge were used to evaluate the performance of the electrodes. The results showed that higher concentration of ammonia contributed to better diffusion and specific capacitance. The study also explored the application of linear sweep voltammetry and chronoamperometry in water-splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
G. Maheshwaran, C. Selvi, R. Kaliammal, M. Ramesh Prabhu, M. Krishna Kumar, S. Sudhahar
Summary: The Cr2O3-NiO NC synthesized by hydrothermal method showed superior electrochemical performance with higher specific capacitance and lower resistance. The electrode material exhibited good stability and reversibility, maintaining 87.7% capacitance retention even after 2000 cycles.
Article
Materials Science, Multidisciplinary
Khursheed Ahmad, Mohd Quasim Khan, Ali Alsulmi, Haekyoung Kim
Summary: This work presents a simple synthesis method for tin oxide (SnO2) and investigates its structural, compositional, morphological, and surface area properties. The synthesized SnO2 exhibits a hexagonal shape structure observed by FESEM, and BET analysis confirms its good surface area of 43.5 m2/g. The modified SnO2-GE electrode shows excellent performance as a hydrazine sensor, with a low detection limit of 2.47 µM and sensitivity of 0.43 µA µM-1cm-2 using CV, and an improved detection limit of 0.17 µM and sensitivity of 0.39 µA µM-1cm-2 using LSV. The modified SnO2-GE electrode demonstrates remarkable performance in terms of low detection limit, cyclic repeatability, and cyclic stability.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Crystallography
Ali Alsalme, Huda Alsaeedi
Summary: The determination of hydrazine is important due to its hazardous nature. In this study, a hydrazine electrochemical sensor was designed and fabricated using two-dimensional molybdenum diselenide (MoSe2) synthesized via the sol-gel method. The synthesized MoSe2 was characterized for its phase purity, surface morphology, and elemental composition. A glassy carbon electrode was modified with the prepared MoSe2 and used as the working electrode for hydrazine sensing. The MoSe2-GC electrode exhibited excellent sensing performance with high sensitivity, low detection limit, and good selectivity.
Article
Materials Science, Ceramics
Akbar Mohammad, Mohammad Ehtisham Khan, Md Rezaul Karim, Moo Hwan Cho, Taeho Yoon
Summary: An Ag@SnO2-g-C3N4-based electrochemical sensor was developed for the successful detection of the carcinogenic substance hydrazine. The sensor showed good sensitivity and low detection limit, enabling efficient monitoring of hydrazine concentration under various conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Muhammed Zahid Dogan, Dincer Gokcen, Cem Bayram
Summary: Graphene has attracted a lot of interest in electrochemical applications due to its stability and high surface area-to-mass ratio. This study investigated the doping modification of graphene and characterized the samples in terms of doping level and various physical and chemical properties. The results showed that doping did not significantly affect the electrochemical performance of the graphene.
Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Suliman A. Alderhami, Andrew Guy Thomas, Yasser T. Alharbi, Laila Almanqur
Summary: The successful fabrication of Er2S3:Ni3S4:Co9S8 thinfilm using diethyldithiocarbamate via physical vapor deposition is discussed in this study. Analytical techniques were used to evaluate the structure, morphology, and optical properties of the material. The thin film demonstrated promising properties such as crystallite size of 37.8 nm, bandgap energy of 3.47 eV, satisfactory supercapacitance performance with a specific capacitance of 553.8 Fg 1, cycle stability, and exceptional photocatalytic activity in degrading pesticide fuberidazole.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiongliang Yuan, Wei Zeng
Summary: The NiCo2S4/nickel foam composite electrodes were prepared by cyclic voltammetric deposition of NiCo2S4 arrays on nickel foam, and the performance of the composite electrodes as supercapacitors was investigated. The electrode with 5 deposition cycles exhibited the highest supercapacitor performance, with a specific capacitance of 2244.8 F/g at a current density of 1 A/g; it also showed a capacitance retention rate of 66% and a Coulombic efficiency of 99% after 1000 charge/discharge cycles.
Article
Chemistry, Analytical
S. S. Pradeepa, K. Sutharthani, R. Subadevi, M. Sivakumar
Summary: Materials composed of iron oxide-chromium oxide (Fe2O3-Cr2O3) nanocomposites with multiple redox-active sites and superior electrical conductivity are synthesized for efficient energy storage. The Fe2O3-Cr2O3 nanocomposite electrode exhibits a high specific capacity of 544.2 Cg-1 at a scan rate of 10 mV/s, along with low solution resistance (0.75 Ω) and charge transfer resistance (0.06 Ω) as evaluated by Electrochemical Impedance Spectroscopy. Prolonged discharge time and a maximum specific capacity of 814 Cg-1 at a current density of 1 Ag-1 are achieved for the Fe2O3-Cr2O3 nanocomposite, with a capacitive retention of 79.2% after 5000 consecutive charge-discharge cycles. An asymmetric supercapacitor device, using Fe2O3-Cr2O3 as the cathode and activated carbon (AC) as the anode, delivers a high energy density of 77.17 Wh kg-1 corresponding to a power density of 650 W kg-1.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Electrochemistry
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Laila Almanqur, Andrew Guy Thomas, Suliman A. Alderhami, Yasser T. Alharbi
Summary: The current research successfully fabricated and characterized ternary metal sulfide thin film NiS:Cu2S:Nd2S3 by physical vapor deposition method with diethyldithiocarbamate as the sulfur source. Various analytical methods were used to evaluate its crystallographic, morphological, and optical properties. This study showed that the synthesized material had a band gap energy of 3.5 eV and good electrochemical properties with a specific capacitance of 412 Fg(-1) and cycle stability. Moreover, the synthesized material exhibited high photocatalytic activity in degrading contaminants with a highest degradation rate constant of 1.6 x 10(-2) min(-1).
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Analytical
Hamna Naeem, Khuram Shahzad Ahmad, Shaan Bibi Jaffri
Summary: In the past few decades, the natural deposits of Pyrethroids have greatly increased due to extensive applications, posing serious threats to the environment and human health. Soil contamination has become a global issue, and bacterial degradation has emerged as an effective and sustainable solution for remediation.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Namra Fatima Aftab, Khuram Shahzad Ahmad, Mahwash Mahar Gul
Summary: This study is a pioneer research on the toxic benzimidazole-based fungicide, Fuberidazole. It investigates the degradation and sorption characteristics of Fuberidazole in soil. The results indicate that Fuberidazole has medium sorption capacity, fast degradation rate, and high sensitivity to photolysis, but poses a low risk of groundwater contamination.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
T. Zahra, K. S. Ahmad, S. Sharif
Summary: The greener approaches for synthesis of NiO/ZrO/Mn3O4 nanocomposites offer an alternative method with reduced hazardous chemicals and biological risks in biomedical applications. Plant-assisted synthesis of mixed metal oxide nanoparticles has gained popularity due to its simplicity, fast synthesis, and environmental friendliness. The synthesized nanocomposites were characterized using various spectroscopic techniques and the phytochemicals responsible for the formation of metal oxide nanocatalysts were identified. The study also investigated the catalytic activity of the nanoparticles in degrading organic dyes, demonstrating excellent catalytic activity even under dark ambient conditions and following pseudo-first-order kinetics.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Sobhy M. Ibrahim
Summary: A novel hybrid Barium-Iron sulphide combined with graphene oxide (Ba4Fe2S6-GO) thin film was prepared, showing enhanced electrical and photocatalytic properties. Characterization revealed small band gaps and excellent energy storage capacity of the thin film.
Article
Materials Science, Multidisciplinary
Irum Shaheen, Khuram Shahzad Ahmad, Camila Zequine, Ram K. Gupta, Andrew G. Thomas, Anjum Qureshi, Mohammad Azad Malik, Javed H. Niazi, Saud Alarifi
Summary: Advancements in metal oxides-based electrode materials for supercapacitors have recently gained significant attention in research. The doping of Co3O4 nanoparticles with PdO/Pd using an ecofriendly extracted foliar reducing and stabilizing agent has been analyzed. The synthesized Co3O4:PdO/Pd nanocomposite exhibits a multifaceted phase composition with improved electrochemical performance. The results highlight the potential of these functionalized nanocomposites as promising electrode materials for supercapacitor applications.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Sobhy M. Ibrahim
Summary: The most effective way to improve electrochemical efficiency is to design nanostructures that fully utilize the advantages of all metals and create an interface impact between structures. In this study, an elongated with flowery flakes In:SnO2/La3InS6 structure was produced using diethyl dithiocarbamate compound. The substance's morphological, crystalline, and opto-electrical properties were examined. The photoelectrochemical cell's transparent photoactive electrode exhibited an extraordinary specific capacity of 603 F g(-1) at 5 mV s(-1) when illuminated, indicating its potential for renewable energy systems.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Laila Almanqur, Suliman A. Alderhami, Yasser T. Alharbi
Summary: A composite of erbium, zirconium, and nickel sulphide conjugated with graphene oxide was fabricated as a transparent conductive electrode. The composite showed enhanced photo-current density and specific capacitance under illuminated conditions, making it suitable for integration into renewable energy systems.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Suliman A. Alderhami, Andrew Guy Thomas, Yasser T. Alharbi, Laila Almanqur
Summary: The successful fabrication of Er2S3:Ni3S4:Co9S8 thinfilm using diethyldithiocarbamate via physical vapor deposition is discussed in this study. Analytical techniques were used to evaluate the structure, morphology, and optical properties of the material. The thin film demonstrated promising properties such as crystallite size of 37.8 nm, bandgap energy of 3.47 eV, satisfactory supercapacitance performance with a specific capacitance of 553.8 Fg 1, cycle stability, and exceptional photocatalytic activity in degrading pesticide fuberidazole.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Shaan Bibi Jaffri, Khuram Shahzad Ahmad, Isaac Abrahams, Mohamed A. Habila
Summary: This work explores the pristine ruthenium oxide and RuO2-zinc oxide nano-hexagons anchored spheres prepared via a simpler microwave assisted route. The nano-hybrid material exhibited excellent electro-catalytic performance and energy storage capability.
Article
Materials Science, Multidisciplinary
Shaan Bibi Jaffri, Khuram Shahzad Ahmad, Isaac Abrahams, Mohamed Ouladsmane
Summary: This study elucidates the fabrication and energy applications of a novel perovskite hetero-system, SET:CPVSK, formed by ternary lanthanide doping of CsPbI2.4Br0.6. SET:CPVSK exhibits adjustable band gap range and excellent stability, showing potential applications in solar cells and electro-catalysts.
Article
Chemistry, Multidisciplinary
Shaan Bibi Jaffri, Khuram Shahzad Ahmad, Isaac Abrahams, Mohamed Ouladsmane
Summary: This study presents the design, optimization, and applications of the lanthanide tri-doped CsPbI2.7Br0.3 (CPN:CPVSK). The CPN:CPVSK heterostructure displayed optical activity for 28 days with a narrowed band gap, and showed potential as a photo-converter inside perovskite solar cells. The CPN:CPVSK electrode exhibited moderate affinity towards oxygen production and remarkable hydrogen generation activity. Overall, CPN:CPVSK is a sustainable and energy efficient choice for practical scale energy systems.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sundus Azhar, Khuram Shahzad Ahmad, Isaac Abrahams, Tenzin Ingsel, Ram K. Gupta, Adel El-marghany
Summary: This study fabricates a CuO:La2O3-based electrode using a sustainable and environmentally friendly method involving phyto-aqueous extract derived from Amaranthus viridis plant leaves. The synthesized nanoparticles exhibit varying morphology and crystalline size, with the lowest optical band gap energy observed for a 7.5% doped concentration. The fabricated electrode shows a specific capacitance value of 879.6 F/g in supercapacitor studies, and demonstrates excellent cyclic stability for over 2000 cycles and up to 20 hours in water splitting studies. Overall, CuO:La2O3 is identified as an efficient energy storage material and a promising catalytic material for water splitting studies.
Article
Engineering, Chemical
Mahwash Mahar Gul, Khuram Shahzad Ahmad, Andrew Guy Thomas, Ammar Mohamed Tighezza
Summary: The research focused on the creation and use of bi-metal sulfide thin film Nd2S3:Ni9S8. The study demonstrated the remarkable supercapacitive capability and high degradation efficiency of the thin film in environmental remediation applications.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Taghazal Zahra, Khuram Shahzad Ahmad, Camila Zequine, Ram K. Gupta, Andrew Guy Thomas, Mohammad K. Okla, Ibrahim A. Saleh
Summary: This study focuses on synthesizing ZnO/ZrO2 mixed metal oxide using organic chemicals in an environmentally friendly manner and investigates its phase structure, morphology, surface chemistry, and optical properties. The results show that the synthesized material exhibits remarkable catalytic activity, providing a promising solution for clean energy generation and fuel cell applications.