Article
Chemistry, Multidisciplinary
Julian Borowec, Victor Selmert, Ansgar Kretzschmar, Kai Fries, Roland Schierholz, Hans Kungl, Ruediger-A. Eichel, Hermann Tempel, Florian Hausen
Summary: An investigation on the conductivity of individual carbon nanofibers (CNFs) and their networks reveals that the microscale CNF networks exhibit good electrical interconnections and a homogeneous current flow. The macroscopic conductivities are strongly correlated with the microscopic results. The presence of highly resistive surface fractions limits the conductivity of CNFs and their networks, and this limitation can be reduced by increasing the carbonization temperature. This study contributes to the understanding of the microstructual models of CNFs and their electrical properties, particularly electron percolation paths.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Urska Trstenjak, Nina Daneu, Jamal Belhadi, Zoran Samardzija, Aleksander Matavz, Vid Bobnar, Gertjan Koster, Matjaz Spreitzer
Summary: Epitaxial thin films of 0.67[Pb(Mg1/3Nb2/3)O-3]-0.33[PbTiO3] (PMN-33PT) were prepared using ceramic targets and pulsed-laser deposition (PLD), enriched with PbO (and MgO). The composition and crystal structure were analyzed using high-resolution X-ray diffraction. Chemical analysis of the films revealed deviations from stoichiometry, especially in Pb and Mg content. Custom-made ceramic targets were found to effectively tune the film stoichiometry, showcasing their advantage over single-crystal targets in PLD growth of complex metal oxides. The sample with the largest deviations from nominal stoichiometry, prepared from a target with 20 mol% PbO excess, exhibited the highest longitudinal piezoelectric coefficient.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Ceramics
Kyeong Eun Song, Harald Schlegl, Chan Gyu Kim, Ki Sang Baek, Yu Ri Lim, Jung Hyun Nam, Hyun Suk Kim, Jung Hyun Kim
Summary: The electrical conductivity characteristics of SmBaCo2O5+d (SBCO) and SmBa0.5Sr0.5Co2O5+d (SBSCO) were studied by changing the microstructure characteristics. SBCO and SBSCO with dense microstructure showed different conductivity behaviors, while the porous cathode showed high semiconductor conductivity. The porous cathode exhibited higher conductivity when the measurement temperature was decreased.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chhavi Mitharwal, Sakshi Mishra, Garima Paliwal, Sakshi Mittal, Supratim Mitra
Summary: The study indicated that incorporating 0.04 mol of MnO2 into (Ca0.4Sr0.6)Bi4Ti4O15 material can result in dense microstructure, increased relative density, and stable electrical properties at high temperatures.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Dmytro S. Kozak, Vladimir S. Tsepelev, Viktor V. Konaskov, Viktor V. Vyukhin, Vladislav Y. Zadorozhnyy, Andrey Bazlov, Askar R. Kvaratskheliya, Andrey A. Tsarkov, Jan F. M. Van Impe
Summary: The study investigated the physical properties of Fe48Cr15Mo14C15B6Y2 alloy in liquid state at high temperature. It found that the alloy's viscosity, electrical resistivity, and density decrease with temperature up to 1700 degrees C, with an abnormal increase in viscosity noted in the temperature range from 1360 to 1550 degrees C. Measurements of electrical resistivity and density did not show any anomalies in the same temperature range.
Article
Materials Science, Multidisciplinary
Yi-Hai Yang, Sheng-Yao Li, Zhen-Shan Cui, Zhou Li, Yun-Ping Li, Qian Lei
Summary: The addition of titanium in high-strength Cu-Ni-Si alloys improves mechanical properties by refining the microstructure, suppressing the decreasing trend in mechanical properties, and arousing a primary substructure strengthening mechanism.
Article
Engineering, Electrical & Electronic
Lagen Kumar Pradhan, Suman Kumari, Murli Kumar Manglam, Rabichandra Pandey, Manoranjan Kar
Summary: This study investigates the evolution of microstructure and its effect on the electrical properties of ((Bi0.5Na0.5)(0.94)Ba-0.06)(0.70)Sr0.30TiO3 [BNBSTO] electroceramic. The relative dielectric constant and temperature-dependent relative permittivity both increase with the sintering temperature, while the electrical diffuseness decreases with the increase of grain size. Grain boundaries play a significant role in the electrical conductivity, and the grain size directly influences the ferroelectric properties and energy storage density.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
H. Y. Hong, D. H. Kim, K. Park
Summary: In this study, the thermoelectric properties of Bi0.97Na0.03CuSeO were systematically investigated by doping Mg2+ ions. The Mg2+ doping significantly enhanced the electrical conductivity by increasing hole concentration and reducing phonon thermal conductivity. By improving the thermoelectric power factor and reducing the thermal conductivity, the thermoelectric performance of Bi0.97Na0.03CuSeO was significantly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Nayana Acharya, Raghavendra Sagar
Summary: The spinel-type NiMn2O4 negative temperature coefficient (NTC) ceramic compound prepared by co-precipitation technique shows promising structure, microstructure, and transport properties for thermistors application, with improved electrical conductivity at higher temperatures. The observed microstructure is largely influenced by low-temperature synthesis and the presence of Mn3+ at octahedral sites.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Physics, Condensed Matter
Jianke Liu, Jiejie Zhu, Wenbin Cao, Shihua Liu, Zhizhi Li, Honglin Chen, Yuwei Guo, Rongkai Xu, Keying Liu
Summary: The effects of Sc2O3 doping on the microstructure and electrical properties of ZnO varistors were analyzed in this study. It was found that Sc2O3 doping promotes uniform grain growth and improves the breakdown field strength of varistors. Additionally, Sc2O3 doping enhances the barrier height, resulting in a significant increase in the nonlinear coefficient and a decrease in leakage current density.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Engineering, Electrical & Electronic
Jianjia Zhang, Yue Wen, Mengmeng Hao, Fangfang Zeng, Huitao Guo, Guifen Fan, Wenzhong Lv
Summary: The KNLN-0.06BZ lead-free ceramics prepared by TSS exhibited higher density and better electrical properties compared to those prepared by CS, possibly due to fewer oxygen vacancies facilitating domain switching. Multiple phases may coexist in all ceramic samples, with lower energy barrier at the phase boundary allowing for effective domain switching and resulting in high piezoelectric properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Jun Zhao, Zheyu Fang, Xing Jin, Dong Wang, Xiang Ding, Songlin Ran
Summary: B4C-15 vol% TiB2 composites were prepared by in situ reactive spark plasma sintering method using B4C, TiC, and amorphous B powders. The size coupling of B4C and TiC particles was optimized to achieve enhanced microstructure and properties of B4C-TiB2 composites. During the reactive sintering, fine B4C-TiB2 particles were first formed, followed by growth of large B4C particles and interconnection of in situ TiB2 grains to form an intergranular TiB2 network. The B4C-15 vol% TiB2 composite prepared from 3.12 μm B4C powder and 0.80 μm TiC powder exhibited optimal comprehensive properties, including high relative density, Vickers hardness, flexural strength, fracture toughness, and electrical resistivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
K. Yadagiri, Y. Wang, P. Wu, T. Wu
Summary: The static and dynamic properties of magnetic thin film stacks were studied, revealing the influence of bottom FeGaB layer thickness on magnetic coercive field. The dynamic properties of multilayer thin film stacks showed larger values at lower temperatures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Lei Zhang, Wenfeng Liu, Jinghan Gao, Fanyi Kong, Yongjian Li, Shengtao Li
Summary: The study showed that appropriate Er2O3 doping can decrease grain size, improve the homogeneity of grain size distribution, and contribute to a well-connected Bi2O3 intergranular network, leading to enhanced electrical properties in varistors. However, excessive Er2O3 content can generate excess Er2O3 phases at grain boundaries, which further impairs the connectivity of Bi2O3 networks and decreases the nonlinearity of varistors.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
E. Aldirmaz, M. Guler, E. Guler, A. Dere, A. Tataroglu, F. Yakuphanoglu
Summary: SEM and DSC were used to characterize the microstructure and transformation temperature properties of the CuAlMnZn shape memory alloy used as a Schottky contact in Schottky diode fabrication. The produced diode exhibited good rectification in dark conditions, and the C-V and G/omega-V characteristics were found to significantly change with frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
Adugna Boke Abdeta, Qinhan Wu, Dong-Hau Kuo, Ping Li, Hanya Zhang, Ting Huang, Jubin Zhang, Mengistu Tadesse Mosisa, Jinguo Lin, Xiaoyun Chen
Summary: The photocatalytic activity of Ce-Mo bimetallic oxide with heterovalent metal states and oxygen vacancy defects was improved by S doping. Spherical and plate-like heterostructure Mo(S,O)/(Ce,Mo)(S,O) sulfo-oxide catalysts were synthesized and exhibited excellent photocatalytic hydrogen evolution reaction. The catalyst with more oxygen vacancies and higher Ce3+/(Ce3++Ce4+) ratio achieved high H2 evolution and pollutant degradation rates by efficient charge separation. The formation of oxygen vacancies and conversion of Ce4+ to Ce3+ play a crucial role in enhancing photocatalytic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Qinhan Wu, Longyan Chen, Dong-Hau Kuo, Ping Li, Adugna Boke Abdeta, Osman Ahmed Zelekew, Jinguo Lin, Xiaoyun Chen
Summary: A novel and nonstoichiometric Mn1-xMo(S,O)4-y oxysulfide catalyst with oxygen vacancies and a partial Mo6+-to-Mo4+ transition was synthesized for efficient photocatalytic hydrogen evolution reaction (PHER). The substitution of sulfur in MnMoO4 resulted in Mn1-xMo(S,O)4-y with a narrow band gap and suitable band position for PHER. The MnMo oxysulfide achieved high PHER rate, apparent quantum efficiency and solar-to-hydrogen conversion efficiency through the presence of oxygen vacancies and sulfur substitution.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Merga Hailemariam Urgesa, Girma Sisay Wolde, Dong-Hau Kuo
Summary: This study developed the n-Bi2S3 nanorod/p-MnOS cubic composite catalyst for the first time using a one-step hydrothermal method. Ag nanoparticles were added to enhance the photocatalytic nitrogen reduction reaction (PNRR) activity of the Bi2S3/MnOS. The 1% Ag-Bi2S3/MnOS catalyst showed the highest PNRR activity, producing 5.9 mmol/g of ammonia in two hours, which is double the amount of the Bi2S3/MnOS composite and approximately 5 times the amounts of Bi2S3 and MnOS materials.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Hairus Abdullah, Sethupathi Shanmugasundaram, Hardy Shuwanto, Mohamed Tarek Ahmed, S. K. Krishna, Dong-Hau Kuo
Summary: This study improves the hydrogen-evolved Zn(O,S) photocatalyst by doping Li and finds that Li-ZnOS-10 catalyst has good photoresponse and lower PL emission, making it suitable for hydrogen generation reaction and green chemical conversion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Merga Hailemariam Urgesa, Girma Sisay Wolde, Dong-Hau Kuo
Summary: This study developed a heterojunction 5-20-BiMnO/BiOIBr by anchoring different percentages of n-type Bi2Mn4O10 (BiMnO) nanoparticles on the surface of n-type BiOI0.6Br0.4 (BiOIBr) nanosheets using a one-step hydrothermal method. The 10-BiMnO/BiOIBr heterojunction showed excellent N2 reduction activity under simulated solar light, with an NH3 production yield of 6.2 mmol g-1, significantly higher than that of pristine BiMnO and the solid solution of BiOIBr in 10% methanol aqueous solution. This work provides a systematic method for the fabrication of novel and efficient heterojunctions for nitrogen fixation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Shrisha, Chang-Mou Wu, Kebena Gebeyehu Motora, Guan-Ying Chen, Dong-Hau Kuo, Noto Susanto Gultom
Summary: Reduced tungsten oxide nanoparticles (WO2.72) were synthesized from tungsten trioxide by calcination method and characterized through FESEM, Raman spectroscopy, and XRD. The developed WO2.72 sensor, fabricated on Si/SiO2 substrate with interdigital electrode, exhibited an excellent sensor response of 27% to H2 gas at room temperature. It also showed outstanding stability, repeatability, and humidity sensitivity, making it a potential candidate for real-time H2 gas monitoring.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Engineering, Environmental
Quoc-Nam Ha, Noto Susanto Gultom, Mikha Zefanya Silitonga, Tadele Negash Gemeda, Dong-Hau Kuo
Summary: Through surface engineering, core-shell structured Ni3S2@LiMoNiOx(OH)y nanorod arrays were synthesized on nickel foam using a single-step hydrothermal process, which served as a cost-effective, high-performance, and stable electrocatalyst for industrial hydrogen production system.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Quoc-Nam Ha, Noto Susanto Gultom, Chen-Hao Yeh, Dong-Hau Kuo
Summary: A novel bifunctional electrocatalyst, Li-V co-doped nickel sulfide nanorod arrays (LVN-0.1), has been designed and investigated for efficient water electrolysis with excellent performance in both hydrogen and oxygen evolution reactions. The LVN-0.1 catalyst exhibited low cell voltages and high durability, making it one of the best Ni3S2-based electrocatalysts reported to date. This study provides a facile way to design bifunctional electrocatalysts for high efficient and stable hydrogen production by alkaline water splitting.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Girma Sisay Wolde, Dong-Hau Kuo, Merga Hailemariam Urgesa, Tadele Negash Gemeda
Summary: Simultaneous oxidation of benzyl alcohol and reduction of p-dinitrobenzene were achieved using Gd-doped TiO2 nanorods decorated with PoPD nanowires. The doping of Gd induced surface defects and the incorporation of PoPD enhanced the light absorption capability and electron conductivity of TiO2. Selective oxidation of benzyl alcohol yielded benzaldehyde, while selective reduction of p-dinitrobenzene yielded p-nitroaniline or p-phenylenediamine, depending on the solvent used. This work demonstrates the importance of utilizing photogenerated charge carriers and the role of solvent in selective organic transformations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Noto Susanto Gultom, Mikha Zefanya Silitonga, Kai -Xiang Hu, Yi-Cheng Zhou, Dong-Hau Kuo
Summary: This study synthesized bimetal Ni-Co oxide by a simple electrodeposition technique and annealing at a low temperature under atmospheric conditions. The addition of cobalt significantly altered the surface morphology, and the as-prepared catalysts showed improved performance in the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The NC-2 catalyst demonstrated excellent stability and performance as the air cathode electrode for a liquid zinc air battery device.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Tadele Negash Gemeda, Dong-Hau Kuo, Girma Sisay Wolde, Noto Susanto Gultom
Summary: Using a non-noble trimetal oxide system, researchers have developed a green method for NH3 production through electrochemical nitrogen reduction reaction (eNRR), which is more environmentally friendly than the traditional and carbon dioxide-emitting Haber-Bosch process. The study involved the preparation of a Fe-Mn-Ga trimetal oxide electrocatalyst using a simple one-pot hydrothermal method followed by annealing. The electrocatalyst exhibited high NH3 yield rates and Faradaic efficiencies at specific potential values.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Xiaoyun Chen, Pengkun Zhang, Dong-Hau Kuo, Qinhan Wu, Adugna Boke Abdeta, Binghong Wu, Zhengjie Su, Longyan Chen, Osman Ahmed Zelekew, Jinguo Lin
Summary: In this study, we demonstrated the incorporation of S2- anion into BiVO4 to convert an oxidative-type photocatalyst into a reductive-type sulfo-oxide photocatalyst, which showed efficient N2 fixation under ambient conditions. The doped BiVOS-2 catalyst exhibited the highest NH3 production rate, durable stability, and good conversion efficiency under solar light irradiation. Density functional theory (DFT) calculations revealed that the S2- doping enhanced adsorption energy, elongated the N=N bond of the adsorbed N2 molecule, and facilitated electron transfer, leading to excellent N2 fixation activity. This study provides a promising method to extend the applications of oxidative-type catalysts by converting them into reductive catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Xingqiu Li, Longyan Chen, Pengkun Zhang, Adugna Boke Abdeta, Qinhan Wu, Binghong Wu, Jinguo Lin, Dong-Hau Kuo, Yu Zhang, Xiaoyun Chen
Summary: A monoclinic argentite Ag2S-based AgCoOS oxysulfide catalyst was prepared using a facial method and showed high catalytic reduction performance in the dark with NaBH4. Co-doping of transition metal cations and anions was used to adjust the electron transfer property of the catalyst, with O modifying the energy band structure and Co providing extra active sites. The optimized doping amount led to the highest catalytic reduction performance, demonstrating the potential of the catalyst for industrial wastewater treatment applications.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Engineering, Environmental
Ping Li, Qinhan Wu, Qiao Ji, Adugna Boke Abdeta, Dong-Hau Kuo, Ting Huang, Hanya Zhang, Osman Ahmed Zelekew, Jinguo Lin, Xiaoyun Chen
Summary: Sulfur-doped Sb4Mo10O31 bimetallic sulfur-oxide catalyst (SbMoSO) was synthesized by thermal hydrolysis using different amounts of S precursor CH3CSNH2 (TAA). The catalytic performance of SbMoSO catalysts in reducing toxic organic pollutants and heavy metal ions was studied, and SbMoSO-2 catalyst showed the best performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Hairus Abdullah, Sethupathi Shanmugasundaram, Mohamed Tarek Ahmed, Hardy Shuwanto, S. K. Krishna, Dong-Hau Kuo
Summary: This study demonstrates a simple photocatalysis method to prepare Ni- and Mg-doped ZnIn2(O,S)4 photocatalysts, which show an unprecedented hydrogen evolution rate under visible-light illumination. The co-doping of Ni and Mg induces surface defects that enhance the optical, electrochemical, and photocatalytic properties of the catalyst.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
A. Aly, M. Ghali, A. Osman, M. K. El Nimr
Summary: This study reports the discovery of naturally occurring luminescent graphene quantum dots (GQDs) in coconut water for the first time. The GQDs were identified through various measurements and were found to have dual sizes and emit different wavelengths of light. The GQDs were also utilized as an efficient optical sensor for aniline liquid detection.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zehua Chen, Wencheng Ma, Qinglu Fan, Yanhua Liu, Min Sun, Shuo Wang
Summary: The nanoscale e-VOPO4 materials were successfully prepared by hydrothermal synthesis and calcination, showing high purity and suitable particle size. It exhibited satisfactory electrochemical performance as cathode material for sodium ion batteries, making it a potential candidate for high energy storage systems.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Tao Liu, Yahui Liu, Le Ling, Zhongxi Sheng, Zao Yi, Zigang Zhou, Yongjia Yang, Bin Tang, Qingdong Zeng, Tangyou Sun
Summary: In this paper, a terahertz (THz) micronano device that can switch between bimodal absorption and plasmon-induced transparency (PIT) is proposed. The device consists of layers of graphene, silica, and vanadium dioxide, and has a simple structure, easy tuning, and wide-angle absorption. The device achieves perfect absorption at specific frequencies and is highly sensitive to environmental refractive index. It also has the functions of a three-frequency asynchronous optical switch and slow light effect.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Xiaobo Luo, Songhan Hu, Qiudong Duan, Dacheng Zhou, Jialin Chen, Yugeng Wen, Jianbei Qiu
Summary: The exploration of solar light absorption by a material is important in photonics and optoelectronics. This study reveals the potential of Ba3-xGa2O6:xBi3+ as a promising candidate for various photonic and optoelectronic applications, and demonstrates the use of the material in double-sided laser printing for three-dimensional optical imaging.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Hemin Wang, Yanling Hao, Lele Xiang, Xiaosi Qi, Lei Wang, Junfei Ding, Yunpeng Qu, Jing Xu, Wei Zhong
Summary: This study designed Fe3O4-FeCO3/MWCNTs/RGO MCNCs composites and fabricated large-scale samples using hydrothermal and freeze-drying methods. The microstructural investigation showed that these materials had a mixed-dimensional structure, which improved impedance matching features, polarization, and conduction loss abilities, leading to significantly enhanced electromagnetic absorption properties.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zhenshan Yu, Hao Chen, Xuequan Chen, Yu-Sheng Lin
Summary: This study presents a silicon dielectric metamaterial (SDM) composed of two outer symmetric semi-circular rings and two inner symmetric split-ring resonators (SRRs). The electromagnetic responses of the SDM device in different modes were studied through numerical simulations and experiments. Increasing the structure height of the SDM device resulted in red-shifted resonances and stronger intensities. This study provides a new design strategy for the development of frequency filtering, polarization switching, and resonance modulation characteristics in THz-wave applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yiming Qi, Na Zhang, Meng Zong, Yangxianzi Liu, Weixing Chen
Summary: This study prepares dielectric/carbon fiber based nanocomposites wave-absorbing materials using liquid diffusion and high temperature carbonization strategies. By tuning the element type, drying mode, and filling amount, the electromagnetic parameters and absorbing properties can be adjusted. The best synthesized sample shows excellent absorbing performance, making it suitable for a wide range of electromagnetic wave absorption applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Carlos D. Gonzales-Lorenzo, T. K. Gundu Rao, Alberto A. Ccollque-Quispe, Jorge Ayala-Arenas, Monise B. Gomes, Betzabel N. Silva-Carrera, Roseli F. Gennari, Valeria S. Pachas, F. Monzon-Macedo, H. Loro, Jose F. D. Chubaci, Nilo F. Cano, Rene R. Rocca, Shigueo Watanabe
Summary: In this study, CaSiO3 doped with different ppm of Eu was synthesized using the devitrification method. Various physical properties were analyzed, revealing that the intensity and temperature of the high-temperature TL peak increased with higher dopant amounts. Fluorescence measurements indicated the presence of Eu2+ and Eu3+ ions in the samples. EPR spectra confirmed the existence of two defect centers.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yanning Qu, Xinyang Li, Mei Cui, Renliang Huang, Wanquan Ma, Yunting Wang, Rongxin Su, Wei Qi
Summary: In this study, a new molybdenum disulfide/N,S-doped carbon quantum dots (MoS2/N,S-CQDs) heterojunction with enhanced light absorption and electrons transfer di-functional properties was constructed via a facile one-pot hydrothermal method. The heterojunction showed remarkable efficiencies in degrading methylene blue (MB) and malachite green (MG) in an actual water system under simulated sunlight irradiation. The facile synthetic technique and effective multifunctional properties of the composite have the potential for further research and industrial applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jiayi Wang, Penggang Ren, Xueyan Zhao, Zhengyan Chen, Yanling Jin, Zengping Zhang
Summary: In this study, a novel homojunction photocatalyst was developed by combining defective g-C3N4 and flaked g-C3N4, which showed excellent degradation performance and cycling stability, and exhibited practicality in several simulation experiments.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jing Yan, Xiaoxiao Zhao, Weixing Chen, Panbo Liu
Summary: This research presents a self-templated strategy to prepare a spherical superstructure of carbon nanorods through material modification and pyrolysis. The resulting material exhibits a large controllable radius of curvature and shows excellent microwave absorbing properties due to its high specific surface area and mesoporous structure.
MATERIALS RESEARCH BULLETIN
(2024)
Review
Materials Science, Multidisciplinary
Qinglin Zeng, Zepeng Lv, Shaolong Li, Bin Yang, Jilin He, Jianxun Song
Summary: Liquid metal batteries possess stable safety performance, high rate performance, and thermal stability. The electrolyte, an important component of the battery, plays a significant role in achieving these remarkable performance characteristics. This paper reviews the important research progress of liquid metal batteries electrolyte and discusses the influence of different electrolyte types on energy efficiency. It also highlights the limitations and challenges of existing electrolytes and proposes key development directions for liquid metal electrolytes.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Song Wu, Junli Wang, Xuanbing Wang, Di Jiang, Jinlong Wei, Xiaoning Tong, Zhenwei Liu, Qingxiang Kong, Naixuan Zong, Ruidong Xu, Linjing Yang
Summary: In this study, a composite electrode composed of Ti/TiH2/beta-PbO2_Mn3O4@C was fabricated and investigated for zinc electrowinning. The composite electrode exhibited low overpotential, Tafel slope, icorr, and high voltage stability, outperforming most reported Ti-based PbO2 electrode materials. The excellent catalytic activity can be attributed to the low resistance and porous interlayer of TiH2 nanosheets, as well as the addition of Mn3O4@C micro-flakes to the active layer.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
E. Tsoutsoumanos, T. Karakasidis, N. Laskaris, P. G. Konstantinidis, G. S. Polymeris, G. Kitis
Summary: This study investigates the correlation between nanocrystal dimensions and thermoluminescence signal magnitude through simulations conducted in Python. Two mathematical models, OTOR and IMTS, were used to derive theoretical luminescence signals. The obtained results were compared with experimental data and a thorough comparative discussion was conducted.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)
