Article
Engineering, Electrical & Electronic
Gervais A. Tigwere, Malik D. Khan, Linda D. Nyamen, Felipe M. de Souza, Wang Lin, Ram K. Gupta, Neerish Revaprasadu, Peter T. Ndifon
Summary: The demand for sustainable energy has led researchers to explore inexpensive and efficient catalysts. Transition metal sulfides, such as MnS doped with Cu2+, Fe3+, and Ni2+, have shown promise as effective electrocatalysts for energy storage and generation. This study synthesized cubic phase alpha-MnS and doped MnS nanoparticles and analyzed their morphology, optical and structural properties. The doping of Ni and Fe into MnS electrodes resulted in satisfactory specific capacitances and superior performance for water-splitting processes.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Nadeem Asghar Khan, Iqbal Ahmad, Naghmana Rashid, Muhammad Nadeem Zafar, Farooq Khurum Shehzad, Zahid Ullah, Anwar Ul-Hamid, Muhammad Faizan Nazar, Muhammad Junaid, Muhammad Faheem, Syed Salman Shafqat, Uzma Jabeen, Alaa Dahshan
Summary: This study synthesized Co3O4, Co9S8, and their heterostructure Co3O4/Co9S8 as water oxidation catalysts, and found that the Co3O4/Co9S8 heterostructure showed excellent electrocatalytic activity at low onset potential, along with good long-term stability and a low Tafel slope.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Kefayat Ullah, Won-Chun Oh
Summary: Novel visible-light photocatalyst TiO2-FG/Sr-hexaferrite nanocomposites were fabricated using a simple hydrothermal technique, and their properties were analyzed using various techniques. The unique composite catalyst showed superior photocatalytic properties for the disintegration of organic dyes under visible-light irradiation due to the synergistic effect of TiO2-FG and the fast conducting path provided by the graphene surface. The ternary structure between TiO2, FG, and Sr-hexaferrites also contributed to the high photocatalytic behavior.
Article
Multidisciplinary Sciences
Haihong Zheng, Yizhen Lu, Kai-Hang Ye, Jinyuan Hu, Shuai Liu, Jiawei Yan, Yu Ye, Yuxi Guo, Zhan Lin, Jun Cheng, Yang Cao
Summary: This study introduces a new platform for investigating the ion kinetics at the surface of a photoelectrode, utilizing monolayer InSe as the anode with high photocurrent density.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Ngoc-Diem Huynh, Won Mook Choi, Seung Hyun Hur
Summary: In this study, various two-dimensional materials were used as supports for the bimetallic Co and Mo sulfide/oxide (CMSO) heterostructure. The CMSO supported on reduced graphene oxide (rGO), graphite carbon nitride (gC3N4), and siloxene (SiSh) exhibited better water electrolysis activity compared to pristine CMSO. Particularly, the CMSO@rGO showed a large surface area, low interface charge-transfer resistance, low overpotential of 259 mV (10 mA/cm2), a Tafel slope of 85 mV/dec, and excellent long-term stability over 40 hours of continuous operation in the oxygen evolution reaction.
Article
Chemistry, Multidisciplinary
Tong Wu, Shumao Xu, Zhuang Zhang, Mengjia Luo, Ruiqi Wang, Yufeng Tang, Jiacheng Wang, Fuqiang Huang
Summary: This study designed a sulfide-based metallic heterostructure catalyst to achieve fast and efficient hydrogen generation at high current densities. By modulating the electronic structure of phase transition coupling and interface defects, the efficiency and stability of water splitting were successfully enhanced.
Article
Chemistry, Multidisciplinary
Noelia Losada-Garcia, Jannier Carranza, Jose M. M. Palomo
Summary: Cu2O NPs were created in situ on graphene functionalized with Thermomyces lanuginosus lipase (G@TLL), acting as a template and binder, producing a heterogeneous catalyst. The G@TLL-Cu2O hybrid exhibited high catalytic capacity in the degradation of toxic organic compounds such as trichloroethylene (TCE) and Rhodamine B (RhB). The hybrid showed improved catalytic efficiency compared to the unsupported counterpart and successfully achieved complete degradation of RhB in the presence of H2O2.
Article
Chemistry, Multidisciplinary
Xuan Zhou, Yuxue Mo, Fang Yu, Liling Liao, Xinru Yong, Fangming Zhang, Dongyang Li, Qian Zhou, Tian Sheng, Haiqing Zhou
Summary: In this study, a self-supported Fe2P/Co2N porous heterostructure array with superb bifunctional catalytic activity in base is reported, which provides a new approach to reduce overpotential in non-noble bifunctional electrocatalysts. The catalyst demonstrates low overpotentials for both HER and OER reactions, and exhibits excellent stability over a long period of time.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Idris Ibrahim, Dong Han Seo, Alexander Angeloski, Andrew McDonagh, Ho Kyong Shon, Leonard D. Tijing
Summary: This study successfully synthesized heterostructure microflowers composed of vertically aligned CuS/Sn2S3 nanosheets using a single-step solvothermal method for solar steam generation application. Through the excellent design of microflower structures and nanocavities, high-efficiency water evaporation, salt ions rejection, and organic dye removal were achieved in various applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Fanyue Zhao, Yu Song, Xinghui Liu, Xinxin Zhang, Chun Ma, Guowen Wang, Yinghuan Fu, Hongchao Ma
Summary: A unique Co3O4@(delta-)MnO2 setaria-viridislike heterostructure was assembled using a two-step hydrothermal method, with Co3O4 coupled with an appropriate amount of MnO2 achieving high oxygen evolution potential, fast carrier transfer, low resistance, electron-deficient surface, and high photo-response current, leading to promising PEC degradation efficiency for dye degradation applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Sebastiano Mantovani, Sara Khaliha, Laura Favaretto, Cristian Bettini, Antonio Bianchi, Alessandro Kovtun, Massimo Zambianchi, Massimo Gazzano, Barbara Casentini, Vincenzo Palermo, Manuela Melucci
Summary: The study demonstrates that microwave accelerated synthesis combined with microfiltration enables fast and scalable preparation of highly pure modified graphene oxide nanosheets, which could be used for simultaneous removal of arsenic and lead from water.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Chushen Lin, Hongyan Liu, Man Guo, Yihao Zhao, Xian Su, Piyong Zhang, Yifan Zhang
Summary: This study introduces a non-noble plasmonic photocatalyst composed of Cu6Sn5 bimetal nanoparticles and reduced graphene oxide (rGO), which exhibits broad spectrum absorption and excellent performance in photocatalytic water splitting. The proposed design efficiently generates electron-hole pairs through the plasmonic Cu6Sn5 bimetal and further injects them into rGO, resulting in efficient initiation of overall water splitting.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Environmental
Qianqian Xie, Xuxu Wang, Wenqian Chen, Chao Lei, Binbin Huang
Summary: Bimetallic sulfides supported onto graphene oxide (O-CoMoS/GO) with a heterojunction architecture were synthesized and applied for the activation of peroxymonosulfate (PMS) in water remediation. The O-CoMoS/GO catalyst exhibited excellent catalytic degradation performance towards 4-chlorophenol, with a rapid removal rate within 10 minutes. The introduction of graphene oxide facilitated the electron transfer process and the regeneration of the active center, leading to the enhanced catalytic activity of the bimetallic sulfide catalyst.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Review
Chemistry, Physical
Simranjeet Singh, T. S. S. K. Naik, Nabila Shehata, Liliana Aguilar-Marcelino, Kunal Dhokne, Sapna Lonare, Vishakha Chauhan, Ajay Kumar, Joginder Singh, Praveen C. Ramamurthy, Afzal Husain Khan, Nadeem A. Khan, Mohammad Hadi Dehghani
Summary: Graphene oxide (GO) is a highly versatile material with promising applications in energy, storage, optics, electronics, biology, and chemistry. Its oxygen groups enable complex formation with metal ions and organic contaminants, making it ideal for environmental pollution treatment. The review covers various GO synthesis methods, properties, structures, and applications in device fabrication and wastewater treatment. The techno-economic feasibility of GO as a cost-effective approach is also discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Environmental Sciences
Vu Thi Thu, Mai Hai Trieu, Nguyen Hoang Thuy An, Nguyen Tien Dat, Nguyen Dieu Linh, Nguyen Ba Manh
Summary: In this study, a mussel-inspired biosorbent combined with graphene oxide was developed for removing organic dyes from water sources. The composite was prepared by self-polymerization of dopamine in a weak alkaline solution containing graphene oxide. The morphology and structure analysis revealed that polydopamine gradually covered the surface of graphene oxide flakes, partially reduced these flakes, and formed small grains instead of large aggregates. The adsorption kinetics and isotherms of the biosorbent towards methylene blue followed pseudo-first order kinetics model and Langmuir isotherm. The as-prepared bio-sorbent shows great potential for remediating water sources contaminated with cationic organic molecules and heavy metal ions.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(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
Materials Science, Coatings & Films
Mahwash Mahar Gul, Khuram Shahzad Ahmad
Summary: The tri metal sulphide Al2S3-Cu2S-Ni17S18 thin film was successfully fabricated using physical vapour deposition. The synthesised material was fully characterised using XRD, SEM, EDX, UV-visible spectrophotometer, and FTIR. The ternary metal sulphide exhibited an average crystallite size of 23.5 nm in the nanoscale range. SEM confirmed the presence of clustered morphological particles and EDX confirmed the desired metals. The band gap energy of the ternary metal sulphide was measured to be 2.5 eV. Cyclic voltammetry revealed a remarkable energy storing capability with a supercapacitance of 595 F g(-1), indicating the relevance of the synthesised material. The nanoparticle thin film also showed good cycling stability. Additionally, the thin film demonstrated environmental applicability through photocatalytic degradation, achieving an impressive degradation rate constant of 3.61 x 10(-2) min(-1) for pesticides.
SURFACE ENGINEERING
(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.