Article
Materials Science, Multidisciplinary
Antaz Ali, M. S. I. Sarker, Minhajul Islam, M. K. R. Khan, F. A. Khan, M. N. I. Khan, M. M. Rahman
Summary: In this study, the effect of In on superparamagnetic CoInxFe2-xO4 nanoparticles prepared through one step hydrothermal method was reported. The presence of In ions in the matrix was found to change the structural and magnetic properties of CoFe2O4, confirmed by XRD and magnetic analyses. The decrease in crystallite size and the range of particle size depending on In content were observed.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Thomas Dippong, Mihaela Diana Lazar, Iosif Grigore Deac, Petru Palade, Ioan Petean, Gheorghe Borodi, Oana Cadar
Summary: This study investigates the effect of Mn2+ substitution for Co2+ in CoFe2O4 embedded in a SiO2 matrix on the structural, surface, morphological, and magnetic properties. With an increase in Mn content, particle size increases and magnetic properties change accordingly. The mesoporous structure facilitates the release of fine nanoparticles in aqueous environment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
G. R. Patta, V. Chitti Babu, V. Ravi Kumar, N. Veeraiah
Summary: In this study, cobalt ferrite nanocrystalline powders were prepared with different chelating agents/gelation promoters through sol-gel method, and the samples prepared with lower molecular weight chelating agent showed higher saturation magnetization. The reasons for this phenomenon were identified and discussed in the analysis of the results.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Louiza Dimowa, Nadia Petrova, Yana Tzvetanova, Ognyan Petrov, Iskra Piroeva
Summary: The structural features and thermal behavior of different forms of clinoptilolite from the Beli Plast deposit in Bulgaria were studied. The results showed that ion exchange and the presence of hydrates affected the DSC curves, and different forms of clinoptilolite had different thermal characteristics.
Article
Chemistry, Physical
Mehran Nozari-Asbemarz, Mandana Amiri, Ali Khodayari, Abolfazl Bezaatpour, Sima Nouhi, Pouya Hosseini, Michael Wark, Rabah Boukherroub, Sabine Szunerits
Summary: NF/Co3O4/CoFe2O4 composite electrode was synthesized from a metal-organic framework and showed enhanced electrocatalytic activity for the oxygen evolution reaction in alkaline medium. The presence of Co3+ and Fe3+ in the octahedral sites of Co3O4 and CoFe2O4 was attributed to the enhanced OER activity, leading to stable current density and activity over multiple OER experiments.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
M. A. Islam, A. K. M. Akther Hossain
Summary: This research work focuses on the magnetic properties, nature of the magnetic phase transition, magnetocaloric effect, and critical scaling of magnetization of various Co1-xCrxFe2O4 (x = 0, 0.125, 0.25, 0.375, and 0.5) samples. The results show that the magnetocaloric effect is reliable for samples with x = 0.125, 0.250, and 0.375.
Article
Physics, Multidisciplinary
I Ergin, K. Icin, H. Gungunes, B. Ozcelik
Summary: This study investigates the impact of Cu2+ doping on the morphology, structure, optics, magnetism, and Mossbauer features of Co1-xCuxFe2O4 (x = 0.0-1.0) nanoparticles fabricated by the sol-gel auto-combustion reaction method. The XRD patterns reveal primarily pure phase Co-spinel structures. The crystal sizes range from 28.77 to 36.25 nm. FT-IR spectroscopy identifies fundamental vibrational bands at 426 and 602 cm(-1) wavelengths for the nanoparticles. The substitution of Cu2+ ions for Co2+ ions occurs mainly at the A site, but for x = 0.75, some Cu2+ ions are present at both A and B sites. The magnetic measurements show that Cu2+ substitution significantly affects magnetic quantities such as coercivity field (Hc), remnant (Mr), and saturation magnetization (Ms). The magnetic hysteresis curves exhibit well-known S-shaped features for all nanoparticles, with Ms values ranging from 51.5 to 64.4 emu g(-1), Mr values of 31-36 emu g(-1), and H (c ) values of 429.5-1447.8 Oe.
Article
Chemistry, Physical
Prashant Kumar, Saurabh Pathak, Arjun Singh, H. Khanduri, Kuldeep, Komal Jain, J. Tawale, Lan Wang, G. A. Basheed, R. P. Pant
Summary: This study investigates the spin dynamics of PEG-coated Erbium substituted nanocrystalline CoFe2-xErxO4 by FMR spectroscopy, revealing that the optimum doping concentration is x = 0.3. Static magnetic measurements show ferromagnetic behavior in all sample compositions. The enhancement in magnetic properties is attributed to super-exchange interaction, while room temperature FMR spectra confirm ferromagnetic behavior with improved dynamic response.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Yuheng Guo, Haiyan Li, Shouqiang Li, Leilei Chen, Zhenhai Li
Summary: This study prepared Zn-doped YIG nanoparticles by the sol-gel method and explored the effect and mechanism of Zn ion doping on the crystal structure, peak intensity, and magnetic properties of YIG. The results provide important theoretical support for the application of YIG devices in microwave and high-temperature fields.
Article
Materials Science, Coatings & Films
Arjun Subedi, Detian Yang, Yu Yun, Xiaoshan Xu, Peter A. Dowben
Summary: The research found that CoFe2O4(111) thin films grown on Al2O3(0001) substrates exhibit significant differences between the surface and bulk, with distinct components identified through core level photoemission spectra.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Environmental Sciences
T. C. Bessy, M. R. Bindhu, J. Johnson, R. Rajakrishnan, Palaniselvam Kuppusamy
Summary: In this study, cobalt magnesium ferrite nanoparticles were prepared by combustion method, and the influence of cobalt doping on the properties of the material was investigated. The results showed that increasing the concentration of cobalt led to an increase in the optical band gap energy and a decrease in the crystallite size. The prepared samples exhibited high degradation efficacy towards methylene blue.
Article
Engineering, Environmental
Lili Liu, Jun Wang, Jianan Li, Meng Zhang, Yunxiao Zhang, Rui Zhan, Jiaxin Li, Zhiping Wang
Summary: In this study, the treatment of penicillin G (PG) containing production waste drainage (PWD) and fermentation residue leachate (FRL) was carried out using electrochemical enhanced heterogeneous activation of peroxymonosulfate with CoFe2O4 nanoparticles (EC/CoFe2O4/PMS). The results showed that the mineralization rate of PG did not significantly improve in the EC/CoFe2O4/PMS system, and a toxic intermediate product (P4) was detected. However, in the catalyst saving mode (CSM), the mineralization rate of PG reached 69.1% in artificial wastewater and was further increased to 88.0% and 76.5% in PWD and FRL, respectively. The BOD5/COD ratio significantly increased in PWD and FRL, indicating improved biodegradability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Chandra Sekhar Beera, B. Dhanalakshmi, D. Nirmala Devi, D. Vijayalakshmi, Akanksha Mishra, S. Ramesh, B. Parvatheeswara Rao, P. Shyamala, Melita Menelaou, Nadyah Alanazi, Abdullah N. Alodhayb
Summary: Chromium-doped cobalt ferrite nanoparticles were synthesized and their magnetic properties were studied, showing that the introduction of chromium led to changes in the material's magnetic properties.
Article
Materials Science, Multidisciplinary
Kumud Dubey, Shubha Dubey, Vineet Sahu, Rayees Ahmed Parry, Anchit Modi, N. K. Gaur
Summary: In this study, CoFe2O4 nanoparticles with spherical and flake-like grain structures were successfully synthesized by ultrasonication-assisted sol-gel technique at a lower temperature. The synthesized compound showed a cubic structure, semiconductor nature, and improved magnetic properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Biochemistry & Molecular Biology
Hu Yang, Xingxing Yang, Jinpei Lin, Fang Yang, Yun He, Qing Lin
Summary: CdxNi0.5 -xCu0.2Zn0.3Fe2O4 (0 <= x <= 0.50) ferrite with a spinel structure was synthesized using the sol-gel self-propagation method. The effects of Cd2+ doping on the structure, morphology, dielectric, and magnetic properties of Ni-Cu-Zn ferrite were investigated. Cd doping was found to increase the saturation magnetization intensity (M-s) and coercivity (H-c) of the samples. The dielectric properties of the samples were also significantly influenced by Cd doping.
Article
Plant Sciences
Anil Kumar Patel, Akash Pralhad Vadrale, Reeta Rani Singhania, Philippe Michaud, Ashok Pandey, Shu-Jen Chen, Chiu-Wen Chen, Cheng-Di Dong
Summary: In recent years, algal polysaccharides have been extensively studied for pharmaceutical, nutraceutical, and biomedical applications due to their promising bioactive properties. They are also increasingly being used in industrial and dietary sectors. The marine algae contain a variety of polysaccharides that have a significant impact on the global economy. In the pharmaceutical and biomedicine industries, alginates, fucoidans, ulvans, carrageenans, and chitin are becoming increasingly important.
PHYTOCHEMISTRY REVIEWS
(2023)
Review
Environmental Sciences
Luong N. Nguyen, Minh T. Vu, Hang P. Vu, Md. Abu Hasan Johir, Leen Labeeuw, Peter J. Ralph, T. M. I. Mahlia, Ashok Pandey, Ranjna Sirohi, Long D. Nghiem
Summary: This paper reviews the current state of microalgal culture development for carbon capture and utilization (CCU) and highlights its potential contribution to addressing climate change challenges. Innovative system designs are crucial to achieve large-scale CO2 capture by microalgae, and downstream processes of microalgal culture are important for the overall success of microalgae-based CCU.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Reshmy Rajasekharan, Arun Karthika Bahuleyan, Aravind Madhavan, Eapen Philip, Raveendran Sindhu, Parameswaran Binod, Mukesh Kumar Awasthi, Ashok Pandey
Summary: This study investigates the utilization of jackfruit peel as a source for natural and fully biodegradable nanocellulose, which is used in the production of bioplastics with Azadirachta indica extracts and polyethylene glycol for antibacterial properties. The findings reveal that the developed bioplastics have favorable physicochemical properties and biodegradability, and they exhibit strong antibacterial activity against food spoilage bacteria and prevent biofilm formation. These bioplastics can be considered as suitable substitutes for food packaging materials and wound dressings.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Plant Sciences
Anh Tuan Hoang, Ranjna Sirohi, Ashok Pandey, Sandro Nizetic, Su Shiung Lam, Wei-Hsin Chen, Rafael Luque, Sabu Thomas, Muslum Arici, Van Viet Pham
Summary: This paper presents recent advances and potential advantages of microalgae in biofuel production, as well as their role in the energy and environmental sectors. The challenges related to cultivation, harvesting techniques, and downstream processes are discussed, along with promising solutions for industrial-scale production. Additionally, the paper analyzes the role of microalgae in the circular economy.
PHYTOCHEMISTRY REVIEWS
(2023)
Review
Plant Sciences
Sabeela Beevi Ummalyma, Ranjna Sirohi, Aswathy Udayan, Pooja Yadav, Abhay Raj, Sang Jun Sim, Ashok Pandey
Summary: Microalgae are cell factories that can be used to produce renewable energy, food, feed, pharmaceuticals, and nutraceuticals. The challenges of mass cultivation and biomass recovery limit the industrial application of microalgae. Cultivating microalgae in wastewater has been encouraged for sustainable bioeconomy. Wastewater from the food industry provides a less-toxic growth medium for low-cost microalgal biomass production. Microalgae are potential biocatalysts for wastewater bioremediation and offer a universal alternative for resource recovery from wastewater.
PHYTOCHEMISTRY REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Rakesh Kumar Singh, Dinesh Rangappa, Nishant Kumar, Jyoti Shah, Vivek Kumar, R. K. Kotnala
Summary: In this research, non-stoichiometric potassium-substituted magnesium ferrite nanomaterials were prepared using a cost-effective citrate precursor method and characterized for their structural, magnetic, and optical properties. The results showed stable colloidal phase, potential applications in various electronic fields, and tunable optical properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Review
Environmental Sciences
Vivek Kumar Gaur, Ranjna Sirohi, Mohd Ishfaq Bhat, Krishna Gautam, Poonam Sharma, Janmejai Kumar Srivastava, Ashok Pandey
Summary: The recent studies have shown that micro/nano plastics and antimicrobial resistance genes have harmful effects on the environment and human health. However, there is a lack of research on the interactions between these two factors and their combined influence. The interaction of microplastics has led to the formation of new plastics such as plastiglomerates, pyroplastics, and anthropoquinas. Additionally, the occurrence of microplastics has been found to contribute to the emergence of antimicrobial resistance genes and other pollutants such as polyaromatic hydrocarbons and pesticides. The excessive use of antibiotics following the Covid outbreak has further exacerbated the detrimental effects on human health. This study highlights the relationship between microplastics and antibiotic resistance generation, evaluates the factors of uncontrolled antibiotic use and negligent plastic consumption, and provides future research prospects to accurately assess the serious environmental occurrence of these pollutants.
Article
Thermodynamics
Ranjit K. Verma, Imre Miklos Szilagyi, Kinga Pielichowska, Konstantinos N. Raftopoulos, Peter Simon, Alexey P. Melnikov, Dimitri A. Ivanov
Summary: During ICTAC2020, a workshop on Good laboratory practice in thermal analysis and calorimetry was held for young researchers and beginners. The workshop discussed the relationship between sample properties and temperature, and various techniques for different properties in thermal analysis. This article reviews the workshop and provides useful qualitative and quantitative information about the effects of heat treatments on materials. It also covers recent trends in DSC, TG-FTIR, TG-MS, DMA, kinetics and nanocalorimetry.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Multidisciplinary
Hoang Anh Tuan, Ashok Pandey, Chen Wei-Hsin, Shams Forruque Ahmed, Sandro Nizetic, Kim Hoong Ng, Zafar Said, Duong Xuan Quang, Umit Agbulut, Hady Hadiyanto, Nguyen Xuan Phuong
Summary: Hydrogen energy is considered an attractive alternative to fossil fuels due to its environmental friendliness. Photocatalysis-derived hydrogen from water splitting is believed to be the optimal solution for meeting long-term sustainability and increased energy demands. Metal and carbon-supported photocatalysts show great potential for solar-driven hydrogen production from water. This review discusses the important aspects of different photocatalytic genres and provides new directions for more advanced performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
Raghvendra Singh Yadav, Ivo Kuritka
Summary: This study discusses the use of carbon nanotube and spinel ferrite-based nanocomposites for effective electromagnetic interference shielding and microwave absorption. The fundamental mechanism of EMI shielding and microwave absorption is described. The research thoroughly examines the EMI shielding and microwave absorption properties of various components such as graphene, MXene, semiconductor nanoparticles, polymer, rubber, etc., and discusses potential problems and solutions for creating new nanocomposites for future shielding applications.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Archana Kumari, Rakesh Kumar Singh, Nishant Kumar, Rekha Kumari, Saurabh Sharma
Summary: Crystalline nano silica (SiO2) was synthesized from rice husk, an agricultural waste material, using a cost-effective and environmentally friendly method. A polymer nanocomposite was then prepared using crystalline nano silica and PVA as a polymer binder. The thermal stability, particle size, bond formation, and optical properties were analyzed, and the materials showed potential for applications in various fields.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
Om Priya, Rakesh Kumar Singh, Shashank Bhushan Das, Vivek Kumar, Shama Farozan
Summary: In this study, La3+ substituted M-type BaFe12-xLaxO19 materials were prepared through a sol-gel process. The unique photoluminescence and magnetic properties of these materials make them applicable in fields such as electronic industry, telecommunication, microwave engineering, and storage devices.
Article
Energy & Fuels
Anh Tuan Le, Ashok Pandey, Ranjan Sirohi, Prabhakar Sharma, Wei-Hsin Chen, Nguyen Dang Khoa Pham, Viet Dung Tran, Xuan Phuong Nguyen, Anh Tuan Hoang
Summary: Biochar has applications in energy and environmental fields. To predict its characteristics, a hybrid technique combining machine learning algorithms and game theory-based SHAP analysis was developed. The BRT-based model showed the best prediction performance and SHAP analysis revealed temperature as the main factor affecting the predictions. This hybrid technique provides valuable insights for improving control and application of biochar.
Article
Physics, Multidisciplinary
Singh Sonu Kumar, Rakesh Kumar Singh, Pammi Kumari, Narender Ranga, Aniket Manash, Rekha Kumari
Summary: This study synthesized rare earth boron strontium hexaferrite samples using sol-gel technique and conducted characterization analysis. The results showed that the samples exhibited hexagonal symmetry, and the lattice constants varied with the yttrium content. The morphological structure and grain size of the samples were observed through micrographs, TEM, and HRTEM. Raman and FTIR spectroscopy revealed the vibration modes and chemical bonding of the synthesized samples. Fluorescence spectroscopy and UV-Visible spectroscopy investigated the luminescent properties and band gap characteristics of the samples.
Article
Engineering, Environmental
Pushpa Kumari Sharma, Rakesh Kumar Singh, Rakesh Kumar, Nishant Kumar, Ashok Ghosh, Prabhakar Sharma, Arun Kumar, Prosun Bhattacharya, Manoranjan Kar
Summary: This research investigates the adsorption of As(V) in global groundwater using raw nanobiochar and activated magnetic nanobiochar. The highest adsorption capacities for AMnBC and RnBC were found to be 130 μg/g and 38.67 μg/g, respectively. The modifications on the nanobiochars resulted in different functional groups that contributed to the As(V) adsorption. It is suggested that multilayer chemisorption plays a role in the adsorption of As(V) on biochar surfaces. The cost-effective activated magnetic nanobiochar proved to be an efficient method for As(V) removal from contaminated groundwater.
GROUNDWATER FOR SUSTAINABLE DEVELOPMENT
(2023)