Article
Spectroscopy
P. Sakthivel, R. V. Mangalaraja, G. Ramalingam, K. Sakthipandi, V. Gowtham
Summary: This paper reports the preparation of Mn-doped ZnS and Mn, Ce co-doped ZnS quantum dots using a facile co-precipitation technique. The synthesized particles were confirmed to have a cubic structure and a particle size of -2 nm through XRD and HR-TEM results. The optical characteristics of the samples were revealed through UV-visible absorbance and transmittance spectra.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
Aadil Ahmad Bhat, Insaaf Assadullah, Aaliyah Farooq, Khurshaid Ahmad Malik, Javied Hamid Malik, Radha Tomar, Ishtihadah Islam, Atif Mossad Ali, Shakeel Ahmad Khandy
Summary: In this study, pristine (Zn2SnO4) and copper doped Zn2SnO4 spinels were synthesized hydrothermally under subcritical conditions. XRD pattern confirmed the cubic phase of both pristine and doped nanostructures. Tauc plot and density functional theory (DFT) studies revealed that the band gap values decreased up to 2.5 eV upon the insertion of copper (Cu) into the lattice. The presence of excessive copper led to a blue shift, attributed to the Moss-Burstein effect. Pristine and copper doped Zn2SnO4 exhibited light green and dark blue color, respectively, under different UV lamps (252 nm and 365 nm). Additionally, Zn2SnO4 showed effectiveness in hosting Cu ions, making it a potential green/blue emitter.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Spectroscopy
Usha Jinendra, B. M. Nagabhushana, Dinesh Bilehal, Muzaffar Iqbal, Raghavendra G. Amachawadi, Chandan Shivamallu, Shiva Prasad Kollur
Summary: Zinc oxide (ZnO) nanostructures, both undoped and Co-doped, were synthesized via the solution combustion process. The materials were found to be crystalline based on XRD analysis. SEM micrographs visualized the spherical nanoparticles morphology. FTIR spectra confirmed the presence of defect-associated peak in Co-doped ZnO (Zn0.98Co0.02O) NPs. Photoluminescence studies were conducted, and the adsorptive degradation of Co-doped ZnO nanomaterial using Malachite Green (MG) dye as a representative organic pollutant was investigated. The degradation of MG dye was analyzed to study the adsorption properties, including isotherm and kinetics. Experimental parameters, such as the concentration of the MG dye, dosage, and pH, were varied to determine optimal conditions for the degradation study. The results showed that 70% of the MG dye was degraded. After Co-doping, the near-band edge emission in undoped ZnO transformed into intense red defect emission, which was directly correlated with changes in PL emission.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
P. Sakthivel, Pragati Kumar, M. Dhavamurthy, Arun Thirumurugan, S. Sridhar
Summary: The Mn, La dual doped ZnS QDs were synthesized using co-precipitation method. The XRD analysis confirmed the cubic phase and HR-TEM estimated the average crystallite size of 2 nm. FT-IR spectroscopy and EDAX ensured the purity of the samples. Surface morphological examination revealed the surface structure and particle aggregation of the sample. UV-visible spectroscopy showed that La 2% doped Mn: ZnS had a large band gap of 3.98 eV. The size dependence of the Zn0.98-xMn0.02LaxS QDs was confirmed by the shift of absorption and emission peaks. Increased La concentration led to higher optical absorbance. Defect-induced red emission was observed through PL study. Cyclic Voltagram (CV) findings demonstrated enhanced electrical properties of ZnS electrolytes through codoping with an ideal ratio of La3+ and Mn2+ ions.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Nanoscience & Nanotechnology
Alina Valimukhametova, Conor Ryan, Thomas Paz, Fabian Grote, Anton Naumov
Summary: Graphene oxide (GO) is a promising nanomaterial for optoelectronic applications due to its fluorescence and beneficial physical properties. While other graphene derivatives are possible, GO remains the most heavily used. This study explores different graphene derivatives and their optical properties, proposing a unified model for optical emission. The research suggests that graphene derivatives have minimal dependence on functional groups for their optical properties, indicating potential for use in research and industry.
Article
Chemistry, Physical
Pawan Kumar, Devender Singh, Isha Gupta
Summary: Combustion derived Gd1-xSr2AlO5:x mol% Eu3+ (x = 1-5 mol%) nanophosphors with tetragonal structure and space-symmetry of I4/mcm (space group no. 140) were successfully synthesized and characterized. The doping of Eu3+ ions resulted in expanded lattice constants/volume and shifted diffraction peaks, as confirmed by X-ray diffraction and Rietveld refinement. The nanophosphors exhibited excellent morphology with almost spherical particles in nanoscale, as observed by SEM and TEM. The optimized doping concentration of Eu3+ ions was determined to be 3 mol%, showing good optical properties and thermal stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Hao Xu, Wei Zhu, Mingliang Tang, Xiangyuan Wang, Yin Zhang
Summary: This study investigated a multi-component oxide glass consisting of 50B(2)O(3)-(25-x)Al2O3-10Na(2)O-xBi(2)O(3)-15CaF(2)-0.5Dy-0.5Eu (x = 0 , 5 , 10 , 15 , 20 , 25 mol%). The fluoroborate glass exhibited non-crystallinity, as confirmed by X-Ray diffraction. FTIR spectra revealed the structural properties of the glass, characterized by the stretching and vibrating groups of various boric groups. The optical band gap measurements confirmed the presence of unbridged oxygen (NBOs) in the glass samples. The refractive index of the fluoroborate glass increased with the Bi2O3 content, and the glass exhibited strong emission in the blue, yellow, and red range. The emission spectra were analyzed to calculate chromaticity coordinates, color temperature, color rendering index, and color purity. By adjusting the Bi2O3 content and excitation wavelength, the glass was able to emit white light, making it suitable for white light-emitting diodes (WLEDs).
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Takayuki Suehiro, Masataka Tansho, Toru Ishigaki, Tadashi Shimizu
Summary: The study investigated the ZnGeN2-GaN solid-solution system in previously unexplored compositional regions, revealing the transitional properties caused by the introduction of Ga. The results showed that increasing Ga content led to gradual red shifts in the absorption and photoluminescence properties of the samples.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Marouen Chemingui, Donghao Yang, Yu Wang, Habib Ayeb, Wei Cai, Aiwei Tang, Irena Drevensek-Olenik, Xinzheng Zhang, Jingjun Xu
Summary: In this study, the impact of QDs on CLC was observed to broaden the photonic band gap, increase the photoluminescence intensity, and narrow the optical band gap. These results suggest potential applications in liquid crystal displays and other opto-electronic devices requiring materials with smaller band gaps.
Article
Chemistry, Inorganic & Nuclear
Menghu Zhou, Yadong Gu, Binbin Ruan, Qingsong Yang, Genfu Chen, Zhian Ren
Summary: A novel quaternary selenide Cu6GeWSe8 has been synthesized from the constituent elements, showing semiconductor behavior with a direct band gap. The compound exhibits diamagnetism at room temperature and has a direct band gap, with Cu and Se atoms playing a dominant role in the energy bands and density of states.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
M. Hariharan, R. D. Eithiraj
Summary: In this study, a thorough first-principles analysis of various physical parameters related to CuHgSBr, a quaternary coinage metal-based compound, was conducted using the WIEN2k package. The findings provide valuable insights into its ground state, elastic, electronic, optical, thermodynamic, and transport properties. Notably, CuHgSBr shows potential for thermoelectric applications with a calculated figure of merit of 0.54 at 800 K.
Article
Materials Science, Ceramics
Yu Yang, Changzhao Chen, Xin Wang
Summary: This research aims to study the influence of Ce-doped SnO2 nanocrystals on oxygen vacancy defects. The results show that the Ce doping concentration affects the distribution of Ce3+/Ce4+ ions and the occurrence of CeO2 impurity phase. The optimum doping concentration is 6 at.%, which corresponds to the maximum oxygen vacancy concentration. Furthermore, the band gap narrowing effect and enhanced emission indicate the potential of Ce-doped SnO2 in designing visible light responsive SnO2 based optoelectronic materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Amita Ummadisingu, Simone Meloni, Alessandro Mattoni, Wolfgang Tress, Michael Graetzel
Summary: The crystal size in metal halide perovskite films has a significant impact on their opto-electronic characteristics, particularly due to the concurrent effects of quantum confinement and size-dependent structural effects resulting in a wider band gap. This phenomenon assists in photo-induced charge separation and is widely applicable in different compositions and deposition methods.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Ummer Altaf, Mohd Zubair Ansari, Seemin Rubab
Summary: The synthesis of Sn1-xAlxO2 (x = 0.0, 0.01, 0.02, 0.03, 0.04) nanoparticles by the sol-gel method and their characterization using various techniques revealed that increasing the aluminium content led to a decrease in the crystallite size and optical band gap. Photoluminance measurements showed violet emissions for all samples, with the 3% doped sample exhibiting the lowest intensity, indicating its potential for applications in photocatalysis and lithium-ion batteries. Additionally, 3% aluminium doping was found to be the optimum concentration for tin oxide samples in photocatalytic applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xinyi Du, Junchao Liu, Zhitong Han, Jiansheng Chen, Lina Wang, Xinyi Zhang, Yue Guo, Xuran Liu, Jinming Zhou, Pan Jia
Summary: This study demonstrates efficient photo-driven ion transport in slightly reduced vertical graphene oxide membranes (GOMs) by utilizing short channel lengths and efficient light absorption. The mechanism involves separating photoexcited charge carriers between sp2 and sp3 carbon clusters, which enhances the electric potential of ion channels on GOMs and establishes an electric potential difference across effective ion channels composed of sp3 carbon clusters. This facilitates the directional transport of cations from the illuminated side to the non-illuminated side. The promising results suggest new possibilities for the application of vertical 2D nanofluidic membranes in areas such as artificial photosynthesis, light harvesting, and water treatment.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Puteri Haslinda Megat Abdul Hedei, Zainuriah Hassan, Hock Jin Quah
Summary: The study systematically investigated the effects of post-deposition annealing at different temperatures on polycrystalline gallium oxide films, showing improvements in structural, morphological, optical, and electrical characteristics as temperature increased up to a certain point. However, excessive annealing temperature resulted in detrimental effects such as interfacial layer formation due to excessive oxygen anion diffusion and sudden contraction of indirect band gap, suggesting that 1000 degrees C was not a suitable annealing temperature for Ga2O3 films. An optimized annealing temperature of 800 degrees C demonstrated the best leakage current density characteristic due to improved crystallinity and the smallest FWHM.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Review
Physics, Multidisciplinary
Hameed Naser, Z. Hassan, Sabah M. Mohammad, Haider Mohammed Shanshool, Nabeel Z. Al-Hazeem
Summary: Laser ablation is a promising method for synthesizing nanomaterials and improving the surface plasmon resonance of gold-silver alloy nanomaterials. The parameters and ambient factors can affect the formation and SPR of these materials. Adjusting the gas pressure in the atmosphere is the simplest way to change the SPR.
BRAZILIAN JOURNAL OF PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Ahmad Sauffi Yusof, Sidi Ould Saad Hamady, Christyves Chevallier, Nicolas Fressengeas, Zainuriah Hassan, Sha Shiong Ng, Mohd Anas Ahmad, Way Foong Lim, Muhd Azi Che Seliman
Summary: In this study, a two-layer model was used to investigate the electrical properties of InGaN epilayers grown on a GaN substrate. The study optimized the growth process to obtain high-quality InGaN epilayers and analyzed their structural, optical, and surface morphology properties. The electrical transport properties of InGaN were measured using the van der Pauw/Hall effect method combined with the two-layer model for the first time.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Aminu Muhammad, Sabah M. Mohammad, Zainuriah Hassan, Suvindraj Rajamanickam, Shireen Mohammed Abed, M. G. B. Ashiq
Summary: The purpose of this study is to enhance the electrical and optical properties of zinc oxide (ZnO) by doping it with silver (Ag) and fluorine (F). F and Ag co-doped ZnO nanorods were synthesized using a modified hydrothermal method, and an ultraviolet metal-semiconductor-metal photodetector (PD) was fabricated. The results showed that the co-doped sample had improved crystal quality, reduced defect density, decreased bandgap, and enhanced sensitivity and response times of the PD.
MICROELECTRONICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Shireen Mohammed Abed, Sabah M. Mohammad, Zainuriah Hassan, Aminu Muhammad, Suvindraj Rajamanickam
Summary: This study fabricated a UV metal-semiconductor-metal (MSM) photodetector based on zinc oxide nanorods (ZnO NRs) grown on seeded silicon substrate using a low-cost drop-casting technique. The performance of the fabricated MSM devices was investigated and discussed. The fabricated ZnO NRs UV photodetector showed high stability, photocurrent, sensitivity, and responsivity under 365 nm wavelength illumination and various applied bias.
MICROELECTRONICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Puteri Haslinda Megat Abdul Hedei, Zainuriah Hassan, Hock Jin Quah
Summary: Different annealing temperatures were used to investigate the effects on structural, morphological, optical, and electrical characteristics of RF magnetron sputtered gallium oxide (Ga2O3) films. The phase of the film transformed from g-Ga2O3 to mixed phases of cubic and monoclinic I3-Ga2O3 with increasing temperature, and fully converted to I3-Ga2O3 at 1000°C. Oxygen vacancies and interstitials were formed, creating deep energy levels in the band gap of the Ga2O3 film. The highest current density was observed in the film annealed at 400°C, attributed to the highest density of dislocation and oxygen vacancies in the film. However, a thicker interfacial layer and the location of oxygen vacancies at 1000°C annealing caused a slight increase in current density compared to 800°C at gate voltages greater than 15V.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
M. Z. Mohd Yusoff, A. Mahyuddin, Z. Hassan, M. S. Yahya
Summary: The study investigates the influence of high thermal annealing on the surface morphological, structural, and optical properties of ZnO/AlN/GaN/AlN layers grown on Si substrate by MBE. ZnO thin film was deposited on AlN/GaN/AlN heterostructures using RF sputtering machine. Thermal annealing at different temperatures (600 degrees C and 800 degrees C) with nitrogen flow was applied to the samples in a vacuum tube furnace. Surface morphological, structural, and optical properties were characterized using FESEM, AFM, HR-XRD, and Raman spectroscopy. The optimal thermal annealing temperature was found to be 600 degrees C, resulting in the lowest dislocation density in the films based on the optical and structural evaluation.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
A. K. Tan, N. A. Hamzah, M. A. Ahmad, S. S. Ng, Z. Hassan
Summary: In this study, InGaN/GaN heterostructures were grown on a flat sapphire substrate using MOCVD technique. Results showed that a higher V/III ratio led to parasitic behavior by hydrogen dissociated from ammonia, which etched the InN and changed the growth morphology. Moreover, the InGaN thin films grown at higher V/III ratios exhibited more stable bandgap energy and improved electrical properties. The correlation between strain and carrier density was also discussed, and it was concluded that high-quality and thick InGaN thin films could be grown for solar cell applications at higher V/III ratio conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Saad Milad, Ali Nsar, Zainuriah Hassan, Kuan Yew Cheong, Way Foong Lim, W. F. Lim
Summary: This study introduced the incorporation of CeO2 seed layer for the growth of CeO2 nanostructures using Pandanus amaryllifolius leaf extract as a stabilizing agent. Results showed that samples with CeO2 seed layer demonstrated lower leakage current density regardless of the presence of MEA. The improvement in leakage current density could be attributed to high oxygen composition and adequate oxygen vacancies, while a discrepancy was observed in samples with MEA and without CeO2 seed layer where the oxygen vacancies acted as hole traps degrading the J-V characteristic.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jieh Sim Lim, Fong Kwong Yam
Summary: This paper investigates the effect of post deposition annealing duration on the morphological and optical properties of RF magnetron sputtered amorphous InGaZnO4 (a-IGZO) thin films. The study establishes correlations between refractive index, optical bandgap, surface morphology, film thickness, and stress in response to annealing duration. The results show that the surface morphology and particle size of IGZO films change with increasing annealing duration, while the refractive index and optical bandgap are also affected.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Green & Sustainable Science & Technology
Farah Hayati Ahmad, Zainuriah Hassan, Way Foong Lim
Summary: Post-deposition annealing of CeO2 thin films in nitrogen/oxygen/nitrogen ambient from 400 until 1000 degrees C successfully transformed the films from oxygen poor to oxygen-rich state. The increase of temperature has enhanced the adsorption and diffusion of nitrogen and oxygen, decreasing the attachment of nitrogen to the oxygen vacancies. The film annealed at 800 degrees C achieved the best performance with the lowest leakage current level.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
E. A. Kabaa, Z. Hassan, N. M. Ahmed
Summary: This study demonstrates the direct electrochemical deposition of ZnO nanotwins on ITO glass and investigates their structural and optical properties. The morphology of the ZnO nanotwins varies with current density, and the band gap decreases as carbon dots increase.
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
N. Kasim, Z. Hassan, W. F. Lim, H. J. Quah
Summary: This study compares the differences in the characteristics of ZnO, InZnO, GaZnO, and InGaZnO thin films prepared using the spin coating method. It investigates the contributions of In and Ga towards changes in the physical properties and analyzes the surface distribution of grains using FESEM and AFM. Additionally, the study discusses the optical band gap and elemental atomic percentage of the thin films.
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Khai Shenn Lau, Zainuriah Hassan, Way Foong Lim, Hock Jin Quah
Summary: A cerium doped yttrium aluminium garnet (YAG:Ce) phosphor was synthesized using facile mixed-fuel microwave solution combustion synthesis (MSCS) and subjected to a post-annealing treatment. The annealed powder exhibited improved crystallinity, crystallite size, and spherical-like nano-particles morphology. The phosphor showed a broad yellow emission centred at 534 nm, with increased emission intensity after annealing treatment. Electroluminescence (EL) measurement of the phosphors in a white light emitting diode (WLED) provided characterization of the color properties.
INTERNATIONAL JOURNAL OF NANOTECHNOLOGY
(2022)
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)
