Article
Chemistry, Physical
Greta Inkrataite, Meldra Kemere, Anatolijs Sarakovskis, Ramunas Skaudzius
Summary: This study investigated the impact of boron doping on YAG, YLuAG, and LuAG materials, showing that the addition of boron can indeed shorten decay time and increase emission intensity. Powder compounds containing 1% and 5% boron exhibited the most intense emission, while pure samples doped with 5% boron showed the shortest decay times.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Dan Liu, Sen Wen, Yuxiao Guo, Xingtian Yin, Wenxiu Que
Summary: HgTe colloidal quantum dots (CQDs) synthesized using a facile solution process show great potential for infrared photodetection with high photoresponsivity. The nanocrystal size, reaction temperature and time, as well as ligand exchange, have been explored to optimize the thickness of HgTe CQDs film. The photoconductive device exhibits a high photoresponse even under low light conditions, guiding the development of next-generation infrared photodetectors.
Article
Chemistry, Physical
Joshua P. Smith, Kurt E. Sickafus, Claudia J. Rawn, Cordell Delzer, Ching-Fong Chen, Charles Melcher
Summary: Li-containing garnet compounds have potential as transparent ceramic dual-mode scintillators, with Li5La3Ta2O12 showing promise due to its properties. This study focused on establishing thermal processing conditions for a sol-gel method and consolidating powders to form high-density ceramics. The experiments showed the presence of two cubic Li5La3Ta2O12 garnet phases with different lattice parameters, indicating a remaining excess of Li in the ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Angel de Jesus Morales-Ramirez, Margarita Garcia-Hernandez, Maria Luz Carrera-Jota, Paulina Garnica-Chavez, Brenely Gonzalez-Penguelly, Aristeo Garrido-Hernandez
Summary: Lu2Si2O7:Eu3+ thin films were prepared using sol-gel methods and dip coating, and exhibited a monoclinic structure with preferential orientation along a specific direction after heat treatment. The films showed strong emission from Eu3+ ions, with the optical yield and decay time increasing with the SiO2 content.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Qing Ju, Ge Chao, Tiegen Guo, Zixin Lv, Ruiyu Li, Kang Geng, Nanwen Li
Summary: This study demonstrates the fabrication of PA-doped P-PBI membranes using a cost-effective sol-gel process. The mechanical properties and proton conductivity of sol-gel membranes were found to depend on polymer content, and a sol-gel N-PBI membrane achieved a maximum tensile strength of 7.0 MPa and a maximum proton conductivity of 205 mS/cm. The ADL-controlled re-doped sol-gel N-PBI membrane showed improved proton conductivity and fuel cell performance compared to the sol-gel N-PBI membrane.
JOURNAL OF MEMBRANE SCIENCE
(2024)
Article
Chemistry, Physical
Muhammad Adnan, Muhammad Usman, Muhammad Aftab Akram, Sofia Javed, Saqib Ali, Iftikhar Ahmad, Mohammad Islam
Summary: In this study, zinc ferrite and cobalt chromite nanoparticles were synthesized using sol-gel process and hydrothermal method, respectively, and mixed to form nanocomposites with spinel structure without affecting functional groups. Changes in magnetic properties were observed with increased CC component, leading to optimized magnetic parameters in ZF-CC.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ignacio Rodriguez-Barber, Julia Camut, Laura Luhmann, Aidan Cowley, Eckhard Mueller, Johannes de Boor
Summary: alpha-MgAgSb has been identified as a promising thermoelectric material with peak performance around 300 degrees C. Optimal synthesis of the material can reduce impurities and improve thermoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Marwa Derouiche, Rached Salhi, Samir Baklouti
Summary: In this study, undoped and (Erbium, Ytterbium) co-doped ZnO nanopowders were prepared and their structural, morphological, photoluminescent, and electrical properties were investigated. The results showed that the doping concentration affected the crystallinity and morphology of the ZnO nanopowder. The (5 Er, 5 Yb: ZnO) nanopowder exhibited the highest quantum yield percentage and the best electrical properties.
Article
Chemistry, Multidisciplinary
Junyu Hong, Feilong Liu, Miroslav D. Dramicanin, Lei Zhou, Mingmei Wu
Summary: A series of Yb3+- and Er3+-doped Ca3Sc2Si3O12 (CSS) upconversion (UC) phosphors were synthesized by the sol-gel combustion method to develop novel luminescent materials for optical temperature measurement. The addition of Yb3+ greatly enhanced the emission of Er3+ by effective energy transfer. The prepared CSS:Yb3+,Er3+ phosphors exhibited green and red emissions corresponding to specific transitions of Er3+, and showed excellent temperature-dependent behavior with high sensitivity.
Article
Chemistry, Physical
Yufei Zhang, Kaiyue Wang, Gangyuan Jia, Junlin Li, Hongxing Wang, Yuming Tian
Summary: The optical properties of a silicon-vacancy (Si-V) centre were studied using photoluminescence (PL) with temperature and excitation power dependencies. The intensity decrease, red shift, and broadening of line width with increasing temperature were observed, while the PL intensity of Si-V centre was sub-linear with increasing power. Additionally, the Fermi level shifted below the ground state level of Si-V in the irradiation region due to the introduction of neutral single vacancy (GR1) centre, suppressing the PL signal of the Si-V centre.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Debamalya Ghosh, Radhamadhab Das, Ariful Haque, Kalyan Ghorai, Arup Gayen, Partha Mahata, Asish K. Kundu, Md Motin Seikh
Summary: The sol-gel synthesis and characterization of La(1-x)Ln(x)Cr(0.5)Co(0.5)O(3) perovskites were reported in this study. All samples were found to be monophasic with different crystal structures, and magnetic measurements indicated the presence of antiferromagnetic ordering influenced by the size of the Ln dopant ion.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Physical
Madara Leimane, Katrina Krizmane, Ivita Bite, Jurgis Grube, Virginija Vitola
Summary: This study demonstrates the synthesis of SrAl2O4 doped with Eu, Dy, and B in a SiO2 glass structure using the low-temperature sol-gel method. By varying the synthesis conditions, water-soluble precursors and a dilute aqueous solution of rare-earth nitrates were used as starting materials, resulting in translucent, persistently luminescent glass. It is concluded that the slow drying procedure is optimal for removing excess water and solvent molecules, while boron plays a crucial role in the formation of trapping centers.
Article
Materials Science, Multidisciplinary
Andrea Danielle Cancino-Moreno, Arturo Lopez-Marure, Jorge Humberto Luna-Dominguez, Angel de Jesus Morales-Ramirez, Mayahuel Ortega-Aviles, Jose Alfredo Alvarez-Chavez, Margarita Garcia-Hernandez
Summary: Eu3+-(5% mol)-doped Lu2SiO5 optical quality films were prepared using the sol-gel method and dip-coating technique. The incorporation of Eu3+ ions did not affect the monoclinic crystalline phase of Lu2SiO5. Films without surfactant exhibited a uniform and low rugosity morphology, while films with surfactant showed porous hills and valleys with uneven roughness. The photoluminescence spectrum of Eu3+:Lu2SiO5 films exhibited 2 broad emission peaks. The presence of Glymo promoted the formation of residual Lu2Si2O7 compounds with higher lifetime values.
Article
Optics
Greta Inkratait, Zivile Stankeviciute, Ramunas Skaudzius
Summary: Compounds with garnet structure, such as cerium-doped yttrium and lutetium aluminum garnets, have attracted significant attention due to their high density, thermal stability, intense emission/excitation, and high quantum efficiency. Further optimization is needed to improve scintillator performance, particularly in shortening decay time.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Yanhui Wang, Maroua Bouchneb, Rimeh Mighri, Johan G. Alauzun, P. Hubert Mutin
Summary: Various non-hydrolytic sol-gel synthesis methods were investigated to selectively produce mesoporous t-ZrO2 or m-ZrO2 with significant specific surface areas. The presence of significant amounts of water favored the formation of m-ZrO2, while strictly non-hydrolytic routes favored the formation of t-ZrO2. The role of water in the structure of zirconia was found to be crucial.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Physical
Biswajit Choudhury, Sayan Bayan, Amarjyoti Choudhury, Purushottam Chakraborty
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2016)
Article
Chemistry, Physical
Ravi K. Biroju, Biswajit Choudhury, P. K. Giri
CATALYSIS SCIENCE & TECHNOLOGY
(2016)
Article
Nanoscience & Nanotechnology
Gone Rajender, Biswajit Choudhury, P. K. Giri
Article
Chemistry, Physical
Biswajit Choudhury, Kamal Kumar Paul, Dirtha Sanyal, Anil Hazarika, P. K. Giri
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Chemistry, Physical
Biswajit Choudhury, Ujjal Saikia, Munima B. Sahariah, Amarjyoti Choudhury
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Energy & Fuels
Kamal Kumar Paul, P. K. Giri, H. Sugimoto, Minoru Fujii, Biswajit Choudhury
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2019)
Article
Chemistry, Multidisciplinary
Trishamoni Kashyap, Sweety Biswasi, Arup Ratan Pal, Biswajit Choudhury
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2019)
Article
Chemistry, Physical
Trishamoni Kashyap, Sritam Biswas, Shahnaz Ahmed, Dhrubajyoti Kalita, Pabitra Nath, Biswajit Choudhury
Summary: Experimental results show a quenched plasmonic activity in Ag/Au bimetals-decorated nanosheets under UV-vis and green laser, attributed to the counteraction of Forster-resonance energy transfer (FRET) and plasmon-induced resonance energy transfer (PIRET).
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Manju Kumari Jaiswal, Biswajit Choudhury
Summary: This study reports the hydrothermal fabrication of hydrated hexagonal/orthorhombic mixed-phase WO3 core.shell nanoribbons for the photodegradation of methylene blue. The mixed-phase core.shell exhibits 2.3 times higher photocatalytic activity than monoclinic and hexagonal crystalline phases. Intercalated water, trap states, and prolonged carrier lifetimes play significant roles in enhancing the photocatalytic performance of the hydrated mixed phase.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Manash P. Nath, Sritam Biswas, Pabitra Nath, Biswajit Choudhury
Summary: This study demonstrated the removal of methylene blue from water through adsorption-photocatalysis pairing using Au-CeO2 nanocomposites. The high adsorption capacity of Au-CeO2 is attributed to the presence of Ce3+ states in CeO2 and citrate ligands on Au NPs. The total removal of methylene blue is expedited under white light and lasers.
Article
Nanoscience & Nanotechnology
Suvankar Deka, M. Bidyarani Devi, Mojibur R. Khan, Mojibur R. Keerthana, A. Venimadhav, Biswajit Choudhury
Summary: This study reports the photocatalytic, piezocatalytic, and piezo-photocatalytic responses of bismuth vanadate nanorods under ultrasonic frequency and visible light excitation. The piezo-photocatalytic method efficiently degrades dyes and inactivates bacteria.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Manju Kumari Jaiswal, Biswajit Choudhury
Summary: This study reports the photocatalytic activity of doped graphitic carbon nitride under visible light. Doped samples showed improved band structure and absorption properties compared to the pure form. Various factors such as dopant-induced strain and quantum confinement contributed to the enhanced photocatalytic performance.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Manash P. Nath, Hrishikesh Sarma, Tridip Chutia, Dhruba Jyoti Kalita, Biswajit Choudhury
Summary: Prolonged aqueous washing of SnS2 nanosheets leads to the formation of sulfur vacancies (VS) and a p-n homojunction, enhancing carrier separation and increasing visible light absorption in the semiconductor photocatalyst.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Trishamoni Kashyap, Palash J. Boruah, Heremba Bailung, Dirtha Sanyal, Biswajit Choudhury
Summary: The research demonstrates a method for preparing g-C3N4 nanosheets using atmospheric plasma, which is simple, cost-effective, time-saving, and environmentally friendly. The resulting ultrathin nanosheets with defect activation show enhanced visible light absorption and are effective photocatalysts for degrading rhodamine B under white LED illumination.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Biswajit Choudhury, P. K. Giri
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
