Article
Chemistry, Physical
Kaiming Zhu, Zhanglin Chen, Hui Liu, Xin Yi, Yihuan Wang, Junjie Chen, Xuanyi Yuan, Guanghua Liu
Summary: A series of CaAlSiN3:Ln (Ln=Eu, Ce, Dy, Pr, Tb, Gd, Sm, Tm, Nd) phosphors were successfully prepared by combustion synthesis, and their polychromatic visible afterglow emissions were observed. CaAlSiN3:Eu2+ and CaAlSiN3:Ce3+ showed the best red and yellow long persistent luminescence with persistent times of 4980 s and 4860 s, respectively. Eu2+, Ce3+ co-doped CaAlSiN3 exhibited enhanced red long persistent luminescence with a persistent time of 6300 s, attributed to a more appropriate trap depth distribution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Guodong Fan, Luping Wang, Rongling Hu, Di Fan
Summary: A series of phosphors K1+xBa1-2xBP2O8:xEu3+ were prepared and analyzed for their luminescence properties and thermal stability through XRD, SEM, and PL, showing excellent performance with Eu3+ at x=0.10 being the optimal doping concentration.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
F. B. Xiong, S. D. Chen, W. B. Yang, X. G. Meng
Summary: In this study, novel niobates Y3NbO7: Ln(3+) (Ln = Pr, Sm) phosphors were successfully synthesized and exhibited a bright red or yellowish-red emission band. The results suggest that these phosphors have the potential to be applied in warm white LED.
Article
Materials Science, Ceramics
Liyuan Wang, Gang He, Shaolin Sun, Shijie Fang, Zhipeng Li, Zengchao Yang, Jiangtao Li
Summary: Hollow spherical beta-SiC was successfully synthesized by combustion, and the phase composition and morphology of the products can be controlled by adjusting the Si/C2F4 molar ratio. This method provides a simple way to synthesize hollow spherical beta-SiC without prearranged templates and long synthesis cycles.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Zijian Zhou, Tianxaing Jiang, Yafeng Yang, Yongjing Deng, Mengzhu Wang, Yun Ma, Shujuan Liu, Qiang Zhao
Summary: A pair of chiral manganese(II) complexes based on phosphine oxide are reported, exhibiting outstanding luminescence and circularly polarized luminescence properties. Additionally, a white light-emitting diode with excellent color rendering index is successfully fabricated by integrating the complexes with commercial phosphors. Moreover, the compounds demonstrate exceptional scintillation performance and achieve high-resolution X-ray imaging.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Ceramics
S. V. Kameneva, Kh. E. Yorov, R. K. Kamilov, S. Yu. Kottsov, M. A. Teplonogova, T. V. Khamova, M. A. Popkov, I. V. Tronev, A. E. Baranchikov, V. K. Ivanov
Summary: Aerogels containing rare earth elements are promising compounds for designing functional materials due to their combination of aerogel properties and the luminescent and catalytic properties of rare earth elements. A modified sol-gel method was developed to produce mixed rare earth oxide aerogels with high metal to metal ratio and individual aerogels. The aerogels obtained possess mesoporous structure and high surface area, and show strong luminescence in the visible region after calcination at high temperature.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yonghui Xu, Shuwen Yin, Xiudi Wu, Chuansheng Zhong, Xibao Zhang, Liang Zhou, Hongpeng You
Summary: In this study, a highly efficient phosphor with broadband blue emission was synthesized, showing improved blue emission intensity with the co-doping of Na+ ions. The internal and external quantum efficiencies of the phosphor were significantly enhanced. The phosphor was successfully integrated into WLED devices, achieving high-quality warm white lighting.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Zhanglin Chen, Wei Cui, Kaiming Zhu, Chunguang Zhang, Chuandong Zuo, Yude Niu, Qi Wang, Xuanyi Yuan, Guanghua Liu
Summary: An orange-red emitting Mn2+/Si4+ co-doped AlN phosphor was prepared by combustion synthesis method, and its luminescence properties, afterglow performance, and structure were systematically studied. The co-doping of Si4+ was found to enhance the luminescence intensity and afterglow time, with possible mechanisms discussed using XPS analysis. A shallower trap level was formed after Si4+ co-doping, leading to improved afterglow performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Pratik D. Baheti, Rupesh A. Talewar, S. V. Moharil
Summary: This study investigates a phosphor converted white LED using a yellow and red emitting material. K2SiF6:Mn4+ is prepared as the red emitting phosphor using a wet chemical technique. A white LED is fabricated using a blue InGaN LED chip coated with Y3Al5O12:Ce3+ and K2SiF6:Mn4+ phosphor. The effects of K2SiF6:Mn4+ as the red emitting material in combination with the blue InGaN LED chip and Y3Al5O12:Ce3+ phosphor are also studied. The resulting white LED shows a CIE value of (x=0.31, y=0.33) and a CRI of 78.1.
Article
Chemistry, Inorganic & Nuclear
K. R. Ashwini, H. B. Premkumar, G. P. Darshan, B. Daruka Prasad, H. Nagabhushana, S. C. Sharma, S. C. Prashantha
Summary: Dysprosium substituted strontium aluminate powders were prepared using the solution combustion process with Aloe Vera plant extract as a surfactant/fuel. The compounds showed promising photoluminescence properties and were suitable for WLEDs and display devices. Additionally, they were effective in latent fingerprint visualization.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Optics
Shuhang Tian, Zhenguo Shi, Yongsheng Sun, Pengyu Zhang, Sheng Wu, Dongdan Chen, Puxian Xiong, Qi Qian, Zhongmin Yang
Summary: Rare-earth ions doped phosphate glasses show promising potential in LED lighting and X-ray detection due to their excellent photoluminescence performances and thermal stabilities.
LASER & PHOTONICS REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Naina Lohia, Swati Bishnoi, Govind Gupta, Lalit Goswami, Shailesh Narain Sharma, D. Haranath
Summary: We report a novel approach for the synthesis of single-phase BaZnO2:Eu3+ nano-phosphor, which is rapid and cost-effective using a hot-injection technique without a vacuum system. The synthesized nano-phosphor exhibited trigonal crystal structure and oval-shaped morphology, with good thermal stability and high color purity. This study provides a new option for synthesizing white light-emitting diodes at low temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Optics
Khai Shenn Lau, Zainuriah Hassan, Way Foong Lim, Hock Jin Quah
Summary: Cerium-doped yttrium aluminum garnet (YAG:Ce) nanoparticles were synthesized and optimized through mixed-fuel microwave solution combustion synthesis. The effects of vacuum annealing time and environment on the phosphor properties were investigated, revealing significant impacts on structural, morphological, compositional, and optical characteristics.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Huidong Tang, Tao Zhang, Longzhu Li, Yuwei Chen, Feifei Li
Summary: Eu3+-doped La2Ti6O15 nanoparticles were prepared via sol-gel process and demonstrated excellent luminescence and thermal stability. These phosphors show bright red luminescence and high efficiency in blue and near-UV excitation regions, making them potential candidates for high-power warm white-LED applications.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
T. Kumaresh, Eranezhuth Wasan Awin, Lalith Kumar Bhaskar, Marija Prekajski Djordjevic, Branko Matovic, Ravi Kumar
Summary: Rare earth luminescent materials based on alkali metal oxides, such as calcium aluminates, are gaining attention for their high luminescent efficiency, non-toxic nature, and eco-friendly properties. Calcium aluminates as host materials exhibit stability, suppress the release of non-radiative energy, and are cost-effective, while Europium-doped Mayenite may have potential applications in energy-efficient building designs.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Polymer Science
Asma Rhimi, Khira Zlaoui, Karima Horchani-Naifer, Dorra Jellouli Ennigrou
Summary: Tunisian algae were extracted to obtain sodium alginate, which was subsequently used for the synthesis of ultrafiltration membranes. The synthesized sodium alginate displayed similar properties to commercial sodium alginate, while the extracted sodium alginate showed a semi-crystalline structure and porous morphology. Among the membranes tested, ALG3 exhibited the highest effectiveness in removing bovine serum albumin.
IRANIAN POLYMER JOURNAL
(2022)
Article
Food Science & Technology
Yeddes Walid, Nowacka Malgorzata, Rybak Katarzyna, Boruszewski Piotr, Ostrowska-Ligeza Ewa, Betlej Izabela, Wissem Aidi Wannes, Hammami Majdi, Jallouli Slim, Horchani-Naifer Karima, Witrowa-Rajchert Dorota, Saidani-Tounsi Moufida
Summary: This study aimed to prepare an active, nontoxic, and biodegradable film using gelatin and chitosan enriched with rosemary ethanol extract and essential oil to improve its physicochemical and antibacterial properties. The mechanical properties of the films were enhanced by adjusting the polymer composition, and the antibacterial activity was increased by incorporating rosemary extract and oil.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2022)
Article
Environmental Sciences
Olfa Bachrouch, Houwaida Nefzi, Souhir Belloumi, Karima Horchani-Naifer, Jazia Sriti Eljazi, Soumaya Haoual Hamdi, Kamel Msaada, Jalel Labidi, Manef Abderrabba, Jouda Mediouni Ben Jemaa
Summary: This study investigated the composition and toxicity of Thyme essential oils (EOs) against two main stored grain insect pests. The results showed that the EOs had higher toxicity to the L. serricorne than the T. castaneum. The study also tested the combination of EOs with Tunisian Diatomaceous earths (DEs), which showed promising results in protecting stored grains.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Asma Rhimi, Khira Zlaoui, Bart Van Der Bruggen, Karima Horchani-Naifer, Dorra Jellouli Ennigrou
Summary: Polysulfone ultrafiltration membranes were prepared with additives of poly (vinyl pyrrolidone) and polyethylene glycol. The concentration and nature of the additives had an impact on the performance of the membranes. The membrane with 2 wt% poly (vinyl pyrrolidone) demonstrated optimal retention and permeation. The membrane showed high retention of bovine serum albumin, cobalt, and copper in the ultrafiltration process.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Soumaya Sayeb, Faten Debbabi, Karima Horchani-Naifer
Summary: This study characterizes the physico-chemical properties of commercial photoluminescent pigments and investigates their application on textile fabrics. Various techniques were used to apply the pigments on textile surfaces and the presence of rare earth materials was revealed through analysis. The results showed that the concentration of pigments affected the emission intensity without altering the wavelength. Coating technique resulted in good pigment distribution and high washing resistance after fixation.
Article
Physics, Condensed Matter
Gabriel Lopez-Pena, Khouloud Hamraoui, Karima Horchani-Naifer, Christoph Gerke, Dirk H. H. Ortgies, Emma Martin Rodriguez, Guanying Chen, Daniel Jaque, Jorge Rubio Retama
Summary: This study presents a solution to the lack of control over the absolute temperature in thermal therapies by using core-shell-shell nanostructures doped with lanthanide ions. The luminescence lifetime of Yb3+ is used for thermal reading, while the non-radiative deexcitations of Nd3+ ions enable simultaneous heating. Proof-of-concept experiments demonstrate the great potential of these lanthanide-doped nanostructures for in vivo photo-thermal treatments with reliable thermal feedback.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Physics, Condensed Matter
A. Selmi, L. Ajili, N. Sdiri, M. Ferid, K. Horchani-Naifer
Summary: AgLa(PO3)(4) polycrystalline powder was prepared by flux method and characterized. It was found to have high ionic conductivity and temperature dependence.
SOLID STATE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
M. Ferhi, K. Horchani-Naifer, M. Ferid
Summary: An efficient near-infrared (NIR) quantum cutting (QC) process was achieved in 5% Eu3+/Yb3+ co-doped LiLa(PO3)(4) crystalline phosphor synthesized by solid reaction. The energy transfer from Eu3+ to Yb3+ ions in LiLa(PO3)(4) was studied and confirmed through various characterization techniques. The possible energy transfer mechanisms involved in different transitions were discussed and a schematic energy level diagram was proposed. The quantum efficiency of the NIR QC process was calculated to be 168%. These findings highlight the importance of NIR QC in Eu3+/Yb3+ co-doped LiLa(PO3)(4) for enhancing the photovoltaic conversion efficiency in c-Si solar cells through spectral modification.
Article
Chemistry, Inorganic & Nuclear
Hajer Tlili, Anis Elaoud, Nedra Asses, Karima Horchani-Naifer, Mounir Ferhi, Gerardo F. Goya, Jesus Antonio Fuentes-Garcia
Summary: Many current strategies for water pollutant removal utilize nanomaterials and nanotechnology. Lower values of Biological Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) in water indicate a reduction in oxidizable pollutants. This study examines the use of magnetite nanoparticles (MNPs) and magnetic fields to reduce COD and BOD5 in water from the Wadi El Bey River (Tunisia). After 60 minutes, COD and BOD5 removal rates exceeded 50%, with optimal efficiency at a pH of 8 and MNPs concentration of 1 g/L. The application of a permanent magnetic field (0.33 T) resulted in increased COD and BOD5 removal rates from 61% to 76% and 63% to 78% respectively, potentially due to MNPs coagulation induced by the magnetic field and ionic species adsorption onto the MNPs surface.
Article
Materials Science, Multidisciplinary
Lassaad Ajili, Amine Selmi, Aymen Bourezgui, Abdessalem Elboughdiri, Haithem Rahmouni, Nasr Sdiri, Rafik Mnaseri, Mokhtar Ferid, Karima Horchani-Naifer
Summary: In this study, a Tb3+-doped green-emitting phosphor AgLa(1-x)Tbx(PO3)(4) (x = 1, 3, 5, 10, 20, 30, 40, and 50 mol%) was synthesized using the flux method. Characterization analyses confirmed the monoclinic crystal structure with P2(1)/n space group. The green emission at 544 nm (D-5(4) -> F-7(5)) was observed, and the CIE chromaticity coordinates were obtained. Increasing the concentration of terbium changed the emission color of ALa((1-x))Tb(x)(PO3)(4) from blue to green. The decay curves of Tb3+ ion showed an exponential pattern regardless of the dopant concentration. The measured decay time increased from 0.97 to 1.15 ms as Tb3+ concentration increased from 3 to 30 mol%. These findings have potential applications in the field of phosphor materials and enable the development of a new generation of broadband green tunable fiber lasers, addressing the green gap.
EMERGENT MATERIALS
(2023)
Article
Chemistry, Physical
Sana Yakoubi, Isao Kobayashi, Kunihiko Uemura, Karima Horchani-Naifer, Moufida Saidani-Tounsi, Mitsutoshi Nakajima, Isoda Hiroko, Marcos A. Neves
Summary: The aim of this study was to develop a new binary emulsifier system for nanometric delivery systems. The interaction between gum arabic (GA) and Tween 80 (T80) at different ratios was found to significantly reduce droplet size and interfacial tension of tocopherol-based nanoemulsions. This research provides new insights into the development of industrial applications using tocopherol nanoemulsions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Nesrine Touzi, Karima Horchani-Naifer
Summary: Solid wastes generated in steel plants cause environmental pollution. This study focuses on the reuse potential of mill scale, a valuable industrial waste, for the synthesis of iron oxide pigments. The mill scale is refined and reacted to produce hematite, magnetite, and maghemite pigments. The results show successful conversion of mill scale into high-quality pigments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Optics
G. Ouertani, K. Maciejewska, W. Piotrowski, K. Horchani-Naifer, L. Marciniak, M. Ferhi
Summary: Highly thermally stable warm white light emission has been achieved using a single component phosphor GdPO4: Dy3+/Sm3+. The phosphor exhibits good luminescence thermal stability and low color temperature, making it suitable for warm white light-emitting diode (wLED) applications excited by ultraviolet chips.
JOURNAL OF LUMINESCENCE
(2024)
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)