Article
Thermodynamics
Radhouane Bel-Hadj-Tahar, Mohamed Abboud, Mouna Bouzitoun
Summary: The crystallization evolution of lead zirconate titanate (PZT) powders processed from two organic gel systems was investigated, showing that the perovskite PZT form began to crystallize as the calcining temperature reached 400 degrees C and the crystallization mechanism was related to the powder precursor system. The activation energy for perovskite formation was approximately 77 kJ mol(-1) regardless of the precursor system when the Kissinger model was applied.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Multidisciplinary
Kexin Li, Wanyun Zhang, Kaixin Guo, Ruirui Cui, Chaoyong Deng, Xu Wang
Summary: Pure bismuth ferrite (BFO), zinc oxide (ZnO), and BFO/ZnO and ZnO/BFO composite thin films were successfully fabricated using a sol-gel process. The composite thin films showed broader absorption range, lower leakage current density, and improved ferroelectric and magnetic properties compared to the pure films.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Biochemistry & Molecular Biology
Patricia Gomes, Barbara Costa, Joao P. F. Carvalho, Paula I. P. Soares, Tania Vieira, Celia Henriques, Manuel Almeida Valente, Silvia Soreto Teixeira
Summary: Cancer is a leading cause of death worldwide and traditional treatments have limitations and severe side effects. Magnetic hyperthermia is an alternative method that can be used alone or in conjunction with chemotherapy or radiotherapy. The use of cobalt ferrite particles synthesized through an innovative biogenic sol-gel method was evaluated for its suitability in magnetic hyperthermia applications through thermal, structural, magnetic, and cytotoxic analyses.
Article
Materials Science, Ceramics
Jingwei Zhao, Zhonghua Yao, Zhijian Wang, Ning Zhang, Hua Hao, Minghe Cao, Hanxing Liu
Summary: By employing microstructural engineering, an optimized lead-free Zr-modified BiMg0.5Zr0.04Tix-0.04O3 composition was developed to enhance energy storage behavior, achieving superior energy properties and high efficiency. Rapid annealing and excess Ti source doping effectively increased polarization and dielectric breakdown levels.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
A. Plyushch, D. Lewin, A. Sokal, R. Grigalaitis, V. V. Shvartsman, J. Macutkevic, S. Salamon, H. Wende, K. N. Lapko, P. P. Kuzhir, D. C. Lupascu, J. Banys
Summary: Bulk BaTiO3-xCoFe2O4 (x = 0.1 - 0.6) magnetoelectric composites with high purity and excellent dielectric and magnetic properties were prepared using the phosphate bonded ceramics approach. The dielectric properties were influenced by composition-dependent relaxations and anomalies at different frequencies, while the magnetic properties were limited by the size of CoFe2O4 particles. The measured direct magnetoelectric coupling coefficient was higher than that of conventionally sintered ceramics and comparable to that of core-shell structures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Siqi Zhong, Yulin Zhang, Guiyun Sun, Heng Wu, Hong Ao, Wenchuan Li, Rongli Gao, Xiaoling Deng, Wei Cai, Zhenhua Wang, Chunlin Fu, Xiang Lei, Gang Chen
Summary: In this study, CoFe2O4 (CFO) and Ba0.8Sr0.2TiO3 (BST) particles were prepared using chemical co-precipitation and sol-gel methods respectively. The particles were then surface modified and the CFO-BST composite liquid was prepared by adding CFO: BST = 1:1 to the insulating base solution. XRD results confirmed the successful synthesis of pure phase CFO and BST particles. The maximum dielectric constant and residual polarization intensity were observed at low frequency (200 Hz) after 30 hours. However, the rates of change of dielectric constant and ferroelectricity under the influence of a magnetic field showed an initial increase followed by a decrease. At 2 hours, the maximum rates of change of magnetic dielectric response (3.15%) and magnetoelectric response (256.4%) were obtained, along with a coupling coefficient of 8.34 V/(cm Oe), which is several orders of magnitude higher than that of conventional ceramics, indicating potential applications.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Sh Tabatabai Yazdi, M. Mousavi, Gh H. Khorrami
Summary: V2-xCoxO5 nanoparticles with Co concentrations up to x = 0.2 were synthesized via a sol-gel route in gelatin medium. The synthesized particles mainly consist of crystalline alpha-V2O5 phase, with the particle size increasing from about 34 to 49 nm as the Co content rises. These nanoparticles are found to be direct band gap semiconductors with band gap energies controlled by surface and interface effects rather than chemical composition, and the ferromagnetic nature is influenced by Co substitution.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
Xinkun Liu, Ying Dai, Xinmei Pei, Wen Chen
Summary: Lead-free Sr-doped BCZT thin films were successfully prepared and their structure, electric properties and ECE were investigated. The results show that the phase transition temperatures of the films change with increasing Sr content and merge at room temperature. The BCZT-0.05Sr film exhibits a giant ECE near room temperature.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Parvin Imanipour, Saeed Hasani, Amir Seifoddini, Marcin Nabialek
Summary: In this study, cobalt ferrite magnetic nanoparticles doped with zinc and vanadium were synthesized using the sol-gel auto-combustion method. The samples were characterized using various techniques, and the results showed that doping affected the crystal structure, grain size, and morphology of the synthesized particles, as well as the saturation magnetization and coercivity. These findings are of great importance for understanding the physical properties and applications of cobalt ferrite.
Article
Materials Science, Ceramics
Manman Wang, Rumei Wang, Haiyang Dai, Tao Li, Yu Sun, Dewei Liu, Fufeng Yan, Tengda Ping
Summary: GdMnO3 ceramics were synthesized using solid state reaction and sol-gel methods, with solid phase method showing better dielectric properties and sol-gel method showing stronger magnetization.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Si-Hoon Kim, Gyeong-Seok Hwang, Donghwan Koo, Dong-Hyun Seo, Ye-Pil Kwon, Hansuek Lee, Hyesung Park, Eun-chae Jeon, Ju-Young Kim
Summary: Silica thin films synthesized by sol-gel process have high elastic deformation limit and low water vapor transmission rate. They exhibit good resistance to cyclic bending deformations and can effectively encapsulate flexible organic solar cells.
Article
Materials Science, Multidisciplinary
Vandana, Reema Gupta, Monika Tomar, Ram Pal Tandon, Vinay Gupta
Summary: This study investigates the effect of UV light illumination on the dielectric properties of lead zirconium titanate (PZT) thick films, showing enhanced dielectric constant values for PZT films annealed at 550 and 650 degrees Celsius under UV light. The results demonstrate a significant change in the dielectric constant of the PZT film fabricated at higher annealing temperature (650 degrees Celsius) under UV illumination.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
I. A. Abdel-Latif, H. M. Zaki
Summary: The study investigated the effect of chromium doping in cobalt ferrites at the nano scale, revealing a decrease in lattice constant and crystalline size as well as a decrease in electron density inside the unit cell due to Cr doping. Infrared analysis showed two absorption bands and the electrical properties exhibited semiconductor behavior. Magnetic properties demonstrated ferrimagnetic ordering with a decrease in coercivity as a result of iron substitution with chromium.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Optics
Wenwen Chen, Zhengang Dong, Haisheng Chen, Jiaying Shen, Xiaona Du, Feng Dong, Tianhong Zhou, Wen Huang, Zhenping Wu, Weiwei Liu, Yang Zhang
Summary: This paper describes an experimental investigation of photon upconversion (UC) in perovskite BaTiO3/SrTiO3 superlattices doped with different lanthanide compositions. The results demonstrate that UC emission can be effectively enhanced by precisely incorporating a set of lanthanide ions into separated layers. Furthermore, controlled energy migration can lead to CC emission.
Article
Chemistry, Physical
Anindityo Nugra Arifiadi, Kwang-Tak Kim, Inna Yusnila Khairani, Chang Bae Park, Kee Hoon Kim, Sang-Koog Kim
Summary: CoFe2O4-BiFeO3 (CFO-BFO) nanocomposites were synthesized using a combination hydrothermal/citric acid sol-gel method, resulting in high-purity crystalline nanocomposites. The sintered sample with a 2:2 ratio exhibited high magnetization value, indicating dipolar interaction between CFO and BFO. The results suggest a reliable magnetic-field control of electric polarization in these multiferroic CFO-BFO nanocomposites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Mainul Akhtar, Tania Majumder, Jeng-Kuei Chang, Subhasish Basu Majumder
Summary: In this study, a novel carbon-coated lithium titanate nanocomposite was reported as a superior anode material for lithium-ion batteries. A hybrid lithium-ion battery composed of this anode material and a specific cathode material was successfully fabricated. The battery exhibited excellent cycling stability, rate performance, and overall safety.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Mainul Akhtar, Arijit Mitra, Jeng-Kuei Chang, Subhasish Basu Majumder
Summary: In this work, sol-gel synthesized carbon-coated materials were reported as excellent cathode materials for hybrid Li-ion batteries. The structure of the synthesized material enhances electrochemical performances by reducing diffusion distance, improving electrical conductivity, and structural stability. Additionally, double hybridization was introduced to further improve rate performance and cycleability. The excellent performances of the bimaterial electrodes are attributed to the synergistic interaction between the materials.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Joy Sankar Deb Roy, Mousumi Deb, Md Hussain Sanfui, Shrestha Roy, Arnab Dutta, Pijush Kanti Chattopadhyay, Narendra Nath Ghosh, Subhasis Roy, Nayan Ranjan Singha
Summary: Intrinsically luminescent multifunctional polymers with unique fluorescence properties were synthesized via free radical polymerization. These polymers can be used for sensitive detection, selective binding, and removal-reduction of Cu(II). The aggregation-enhanced green fluorescence in the polymers is associated with hydrogen bondings and electronic interactions involving specific moieties.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Applied
Yang Ding, Soumyajit Maitra, Chunhua Wang, Runtian Zheng, Meiyu Zhang, Tarek Barakat, Subhasis Roy, Jing Liu, Yu Li, Tawfique Hasan, Bao-Lian Su
Summary: This study demonstrates the synthesis of a hydrophilic bi-functional hierarchical architecture of boron-doped graphitic carbon nitride (g-C3N4) material. The hierarchical structure enables highly enhanced visible light absorption and photogenerated carrier separation, leading to excellent photocatalytic performance and high photoelectric current density. This research is of great importance for the practical application of metal-free g-C3N4 photocatalysts.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
T. Bhowmick, A. Ghosh, V Ambardekar, S. Nag, S. B. Majumder
Summary: An economical and portable gas-sensing prototype for monitoring CO2 gas in flue gas has been developed. The prototype demonstrated high sensitivity to the tested gas and could operate within a temperature range of room temperature to 350 degrees C. The dominant mechanism for gas sensing was found to be the formation of carbonates on the CuO surface.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Arindam Mandal, Soumyajit Maitra, Subhasis Roy, Baisakhi Hazra, Koustuv Ray, Kajari Kargupta
Summary: A novel Cu-doped Bi2S3/ graphene composite photocatalyst is synthesized and investigated for selective and enhanced production of methanol through the reduction of CO2. The Cu doping effect on band gap tuning and product selectivity is explored. The optimized 1 wt% Cu-doped Bi2S3/graphene photocatalyst exhibits the highest photocatalytic activity. DFT studies confirm the experimental findings and reveal the mechanism of enhanced performance.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Arijit Mitra, Jagabandhu Patra, Jeng-Kuei Chang, Subhasish B. Majumder, Siddhartha Das
Summary: This article investigates the electrochemical performance of amorphous sodium iron carbonophosphate in both organic and ionic-liquid based electrolytes. The results show that using ionic-liquids instead of organic electrolytes leads to superior cycling performance at room temperature and high temperature, with nearly fade-free electrochemical cells. The dense and ionically conductive protective film composed of anion-reduced moieties is responsible for the excellent high-temperature performance of amorphous sodium iron carbonophosphate with ionic-liquids.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Anwesa Mukherjee, Mainul Akhtar, Jeng-Kuei Chang, Susanta Banerjee, Subhasish Basu Majumder
Summary: A novel NTP/GO/CNT nanocomposite anode material was reported, in which NTP particles were engineered with rGO and CNT. The NTP-rGO10-CNT10 electrode exhibited excellent electrochemical performance, including high specific capacity (124 mA h g-1 at 100 mA g-1), remarkable high-rate cycleability (62.5% capacity retention after 400 cycles at 10 C), and excellent rate capability (87 mA h g-1 at 25C). The capacitive and faradaic contributions to total capacities of the composite electrode were estimated by cyclic voltammetry investigation.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Shyamal Datta, Mouli Mitra, Subhasis Roy
Summary: This research demonstrates an efficient and low surface defect Zn2+-incorporated hybrid perovskite material, where Pb2+ in halide perovskite solar cells is partially substituted with Zn2+. By doping dopant material ZnCl2 with synthetic cellulose HPMC, the surface morphology, crystallinity, and partial substitution of Pb2+ with Zn2+ were improved. The optimized composition of 10 wt% ZnCl2 doping assisted with HPMC media shows the best performance with improved film quality.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Review
Engineering, Electrical & Electronic
Suchismita Mondal, Souhardya Bera, Subhasis Roy
Summary: The recent push towards sustainability has driven the development of solar-driven catalytic processes for cleaner and greener energy conversion. Materials like graphene and transition metal di-chalcogenides (TMDCs) with their 2D nature have been extensively studied for their application in converting solar energy to value-added fuels. However, recent material modifications in photocatalysis have been overlooked, limiting the improvement of photocatalytic activity. This review article focuses on the recent developments of photocatalytic materials involving graphene, 2D black phosphorus, and TMDCs, covering their applications in hydrogen production, carbon dioxide reduction, and organic dye degradation. The article also discusses research data on various morphologies and mechanisms that affect photocatalytic activity, providing insights for practical and commercial applications. Finally, challenges and future prospects for 2D material-based photocatalysis are addressed.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Review
Materials Science, Multidisciplinary
Yang Ding, Soumyajit Maitra, Somoprova Halder, Chunhua Wang, Runtian Zheng, Tarek Barakat, Subhasis Roy, Li-Hua Chen, Bao-Lian Su
Summary: This article critically reviews the latest developments in various photocatalysts for highly efficient light-driven H2O2 synthesis. These materials possess tunable morphology, micro-nanostructure, surface chemistry, and electronic band-gap structure, enabling sufficient light harvesting, rapid separation and transfer of hole-electron pairs, favorable reactant adsorption, and facilitated product desorption, thus providing great activity for efficient light-driven H2O2 production.
Article
Chemistry, Multidisciplinary
Yang Ding, Soumyajit Maitra, Daniel Arenas Esteban, Sara Bals, Henk Vrielinck, Tarek Barakat, Subhasis Roy, Gustaaf Van Tendeloo, Jing Liu, Yu Li, Alexandru Vlad, Bao-Lian Su
Summary: In this study, visible-light H2O2 artificial photosynthesis was achieved by introducing carbon vacancies in three-dimensional hierarchical porous g-C3N4. The implanted carbon vacancies resulted in a significant change in electronic structure, broadening visible-light absorption and facilitating photogenerated charge separation. The introduction of carbon vacancies promoted the formation of superoxide radicals, significantly boosting H2O2 photocatalytic production. The developed photocatalyst exhibited a high H2O2 evolution rate and long cycling stability, making it a promising candidate for safe industrial H2O2 production.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Joy Sankar Deb Roy, Deepak Chowdhury, M. D. Hussain Sanfui, Nadira Hassan, Manas Mahapatra, Narendra Nath Ghosh, Swapan Majumdar, Pijush Kanti Chattopadhyay, Subhasis Roy, Nayan Ranjan Singha
Summary: In this study, four nontraditional fluorescent polymers (NTFPs) with different mole ratios of N,N-dimethyl-2-propenamide (DMPA) and butyl prop-2-enoate (BPE) were prepared through random polymerization in water. Among them, NTFP3 showed the maximum fluorescence enhancement, making it suitable for ratiometric pH sensing, Cu(II) sensing, and pH-dependent cell imaging. The oxygen donor functionalities of NTFP3 involved in binding and sensing with Cu(II) ions were studied using various analytical techniques. The aggregation-enhanced emissions (AEEs) of NTFP3 were attributed to through-space n-p* interactions, N-branching-associated rigidity, and nonconventional intramolecular hydrogen bonding of adjacent NTFP3 moieties.
ACS APPLIED BIO MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Souhardya Bera, Ankit Saha, Shibsankar Mondal, Arnab Biswas, Shreyasi Mallick, Rupam Chatterjee, Subhasis Roy
Summary: Perovskite-based devices have achieved high efficiencies in photovoltaics and energy storage. However, both intrinsic and extrinsic defects in the perovskite structure can affect device performance and stability. Defect engineering, including optimizing structure and morphology, as well as incorporating dopants, is crucial for improving perovskite performance.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Physical
Ridipt Mishra, Souhardya Bera, Rupam Chatterjee, Saptaparna Banerjee, Satarupa Bhattacharya, Arnab Biswas, Shreyasi Mallick, Subhasis Roy
Summary: Metal Halide Perovskites (MHPs) are a new class of semiconductors with unique and superior optoelectronic properties. They utilize the Z-scheme heterojunction mechanism to achieve diversified photocatalytic operations using sunlight, making them potential substances for addressing energy and environmental concerns. Current research focuses on improving the efficiency and activity of photocatalysts and developing heterojunctions with different properties. Further study is needed to apply MHPs in various fields such as CO2 reduction and H2 evolution. In terms of commercialization, MHPs are still in the early stages and require further evaluation of their technological readiness and potential drawbacks, as well as the development of a future roadmap.
APPLIED SURFACE SCIENCE ADVANCES
(2022)
