Article
Nanoscience & Nanotechnology
Abdullah M. Alotaibi, Premrudee Promdet, Gi Byoung Hwang, Jianwei Li, Sean P. Nair, Sanjayan Sathasivam, Andreas Kafizas, Claire J. Carmalt, Ivan P. Parkin
Summary: Zn and N codoped TiO2 thin films were grown using chemical vapor deposition, with different concentrations of Zn impacting superoxide formation, photocatalytic activity, and bactericidal properties. The 0.4% Zn,N:TiO2 thin film demonstrated the highest formal quantum efficiency in degrading stearic acid, while the 1.0% Zn,N:TiO2 film showed the highest bactericidal activity under both UVA and fluorescent light conditions. The enhanced efficiency of the films was correlated with increased charge carrier lifetime, supported by transient absorption spectroscopy measurements.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
Guy Didier Fanou, Mamadou Traore, Benjamin Kouassi Yao, Andrei Kanaev, Khay Chhor
Summary: A new composite photocatalyst was developed by grafting size-selected 5-nm titanium-oxo-alkoxo nanoparticles onto P25-TiO2 nanoparticles and incorporating HAP obtained by co-precipitation of salts. The photocatalytic yield was increased for the composite photocatalysts with the addition of HAP, likely due to a synergy between adsorption and photo-oxidation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Daniela Palomares-Reyna, Juan E. Carrera-Crespo, Fabiola S. Sosa-Rodriguez, Ulises M. Garcia-Perez, Iliana Fuentes-Camargo, Luis Lartundo-Rojas, Jorge Vazquez-Arenas
Summary: Carbon, nitrogen-codoped TiO2 nanoroughness surfaces were successfully synthesized through electrochemical anodization. The 70 V-CN-TiNRS sample exhibited the best photoelectrochemical performance under Xe lamp radiation. PECO method showed the highest CIP removal efficiency in both distilled water and synthetic municipal wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Maira Shabir, Nasir Shezad, Iqrash Shafiq, Ibrahim M. Maafa, Parveen Akhter, Kshaf Azam, Ashfaq Ahmed, See Hoon Lee, Young-Kwon Park, Murid Hussain
Summary: A visible-light active N,S-codoped TiO2 nanocomposite incorporated with carbon nanotubes (CNTs) was synthesized by a multicomponent heterojunction scheme, showing superior photocatalytic performance due to the synergistic effect of ternary components providing a high number of adsorption sites and facilitating effective separation of charge carriers. N,S-TiO2/CNTs exhibited around three times higher photocatalytic activity compared to binary composites and about four times higher than conventional TiO2. Furthermore, the nanocomposites were also investigated for their recyclability for five consecutive cycles.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Crystallography
Federico Giuffrida, Lucia Calcagno, Gianni Pezzotti Escobar, Massimo Zimbone
Summary: The photocatalytic properties of TiO2/FeO3 and TiO2/WO3 nanocomposites were investigated for the degradation of methylene blue. The non-conventional Doctor Blade technique was proposed as an easy and inexpensive method for material preparation. The use of solid substrates rather than powders and the high surface area of nanoparticles improved the photodegradation efficiency.
Article
Environmental Sciences
X. Xin, H. Liu, J. Sun, K. Gao, R. Jia
Summary: The composite material NSFe-TiO2 showed a significant improvement in the photocatalytic degradation efficiency of sulfadiazine compared to TiO2. The parameters such as NSFe-TiO2 loading amount, solution pH value, humic acid concentration, and recycle numbers were also studied. The results indicated that acidic conditions were not conducive to the photocatalysis, and certain substances in the water had mild inhibition on sulfadiazine degradation in the UV/NSFe-TiO2 system.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Dongwei Ma, Jenny Schneider, Wan In Lee, Jia Hong Pan
Summary: Hydrous TiO2 colloidal spheres (HTCS) derived from the direct precipitation of titanium alkoxides have been of interest since 1982. With the development of structure-directing agents in the 21st century, it has become possible to synthesize highly uniform HTCS with reproducible and size-controllable properties, providing versatile platforms for advanced photo/electrochemical applications.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Milena Synowiec, Dominika Zakutna, Anita Trenczek-Zajac, Marta Radecka
Summary: The synthesis method used allows for uniform deposition of both large and small Fe2O3 nanoparticles on the surface of TiO2. Analysis confirms the presence of anatase TiO2 and hematite Fe2O3 in the heterostructure. The TiO2@Fe2O3 heterostructure exhibits enhanced photocatalytic activity compared to pure titanium and iron oxides. The magnetic properties and optical transitions in nanometric Fe2O3 are influenced by the size of the Fe2O3 particles on the surface of TiO2 nanocrystals.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Applied
P. Bamola, S. Rawat, D. K. Pathak, M. Sharma, C. Dwivedi, S. Farsinezhad, R. Kumar, H. Sharma
Summary: Hybrids based on one dimensional nanostructures have shown promising results for photocatalytic applications. By modifying the interface, hybrids with electronic interaction can enhance photocatalytic activity. Switching between Ohmic and Schottky barriers using different hybrids can lead to improved charge transport and ultimately enhance photocatalytic activity. Metal and bimetallic nanoparticles were used to modify interface and studying their effect on charge carriers, with the analysis showing enhanced photocatalytic activity in hybrids with improved charge separation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hajar Lamkhanter, Sana Frindy, Yuri Park, Mika Sillanpaa, Hafida Mountacer
Summary: The research successfully removed DFL fungicide through the Photo-Fenton process, optimized reaction conditions, and demonstrated the optimal catalyst dosage of alpha-Fe2O3 for high removal rate.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Liming Bai, Lumin Liu, Jinghui Pang, Zhao Chen, Minghui Wei, Yang Wu, Guohua Dong, Jianwei Zhang, Dan Shan, Baiqi Wang
Summary: In this study, N,P-CQDs were deposited on TiO2 nanowires to form N,P-CQDs/NW-TiO2, which exhibited excellent photocatalytic degradation for methyl blue due to its mesoporous structure and high separation rate of photoexcited carriers. Additionally, the fabricated nanosized photocatalyst showed outstanding recycled photocatalytic capability, maintaining 59.9% activity after four cycles, indicating its potential for widespread use in wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Fernando Fresno, Maria U. Gonzalez, Lidia Martinez, Marcial Fernandez-Castro, Mariam Barawi, Ignacio J. Villar-Garcia, Jimena Soler-Morala, Patricia Renones, Monica Luna, Yves Huttel, Victor A. Pena O'Shea, Jose M. Garcia-Martin
Summary: This work reports the preparation of titanium dioxide nanocolumnar structures by magnetron sputtering and thermal annealing, with further functionalization with gold resulting in well-dispersed Au nanoparticles. The resulting nanostructures exhibit photocatalytic self-cleaning activity, improved charge separation at the Au/TiO2 interface, and increased hydrophobicity of the surface, unaffected by the presence of Au nanoparticles.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Environmental Sciences
Chao Gong, Jinli Zhai, Xi Wang, Wenjie Zhu, Daoli Yang, Yongming Luo, Xiaoya Gao
Summary: In this study, a heterogeneous photo-Fenton and photo-catalytic system was constructed using oxide pyrite (FeS2/Fe2O3) mineral and organic acids. The system enhanced the degradation efficiency of carbamazepine (CBZ) through the synergistic photo-Fenton and photo-catalytic reaction. This investigation provides an innovative strategy for the removal of organic pollutants using natural minerals.
Article
Engineering, Chemical
Chun Tong, Liquan Jing, Minqiang He, Meng Xie, Wei Wei, Yuanguo Xu, Hui Xu, Huaming Li
Summary: A green and efficient catalyst, 1D nanorod Fe2O3/NaNbO3 composite, was successfully prepared and showed superior performance in degrading tetracycline, especially in the presence of H2O2 solution. The introduction of Fe2O3 nanoparticles was found to activate H2O2 more efficiently and generate more free radicals to degrade pollutants. This study provides insights into the design of a photo-Fenton catalyst with dual ion synergy and full spectrum response.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Applied
Yunfei Ma, Wenhui Yue, Zehong Xu, Ziwei Ye, Jinlong Zhang
Summary: Composite nanoparticles consisting of upconversion nanoparticles (beta-NaYF4:Yb/Er) and nitrogen doped TiO2 nanoparticles were fabricated using a chemical assembly method. Efficient energy transfer was achieved by matching the upconverted energy with the band gap of N-TiO2, resulting in excellent Rhodamine B (RhB) degradation activity under near infrared (NIR) light irradiation.
Article
Materials Science, Ceramics
Ahmad Umar, Ahmed A. Ibrahim, H. Y. Ammar, Umesh T. Nakate, Hasan B. Albargi, Y. B. Hahn
Summary: The synthesis, characterizations and gas sensor application of nano-textured urchin like CuO hollow microspheres were reported. The fabricated CuO sensor device showed elevated response towards ethanol with high selectivity after optimization of operating temperature and concentration. The developed gas sensor devices demonstrated outstanding selectivity towards ethanol gas and the ethanol sensing mechanism was elucidated using density functional theory computational quantum modeling.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Ahmad Umar, Ahmed A. Ibrahim, Umesh T. Nakate, Hasan Albargi, Mabkhoot A. Alsaiari, Faheem Ahmed, Fahad A. Alharthi, Abdulaziz Ali Alghamdi, Nabil Al-Zaqri
Summary: The ethanol sensing properties of nanocrystalline copper oxide (CuO) nanoplates were studied and a sensor based on CuO nanoplates showed a high ethanol response at 250 degrees C. The sensor exhibited high selectivity in the presence of various gases such as NO2, CO2, CH4, and H-2. The CuO nanoplates based gas sensor was also tested for transient ethanol response and stability.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Environmental Sciences
Prachi Chaudhary, Vikas Beniwal, Ahmad Umar, Raman Kumar, Priyanka Sharma, Anil Kumar, Yas Al-Hadeethi, Vinod Chhokar
Summary: Industrial wastes, such as tannery wastes, contain bacteria resistant to Chromium (Cr) and tannic acid (TA), which can effectively remove these pollutants through co-culture. Optimization of physio-chemical parameters enhances the efficiency of co-culture system, showing potential for degradation of other heavy metals by the isolated bacteria.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Chemistry, Physical
Xiaojing Lin, Mingxuan Sun, Bowen Gao, Wen Ding, Zihan Zhang, Sambandam Anandan, Ahmad Umar
Summary: A series of mixed-phases TiO2 were fabricated using a mild hydrothermal process, resulting in nanocrystals with different combinations of anatase, rutile, and brookite phases. While the triphase TiO2 showed the longest optical edge in UV-vis absorption spectroscopy, the diphase TiO2 exhibited higher degradation ratio of levofloxacin. This study provides insights into regulating the phase ratio of TiO2 for environmental remediation applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Ahmad Umar, Ahmed A. Ibrahim, Rajesh Kumar, Hasan Albargi, Mabkhoot A. Alsaiari, Faheem Ahmed
Summary: The study investigated the synthesis, characterization, and ethanol gas sensing properties of hematite iron oxide microstructures. The fabricated sensor demonstrated a high response to ethanol gas compared to CO and H-2 gases, with a proposed ethanol sensing mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Review
Chemistry, Medicinal
Nuha Al-Harbi, Hiba Mohammed, Yas Al-Hadeethi, Ahmed Samir Bakry, Ahmad Umar, Mahmoud Ali Hussein, Mona Aly Abbassy, Karthik Gurunath Vaidya, Ghada Al Berakdar, Elmoiz Merghni Mkawi, Manasa Nune
Summary: Regenerative medicine aims to improve tissue repair and restoration processes using bioactive materials like bioactive glass, which is mainly used for bone tissue regeneration. The bioactivity of bioactive glass depends on compositional ratio, and manipulating the content ratio can develop other types of bioactive glasses with controllable chemical durability and affinity with bone.
Article
Chemistry, Physical
Bowen Gao, Mingxuan Sun, Wen Ding, Zhipeng Ding, Wenzhu Liu
Summary: A series of gamma-graphyne/TiO2 nanotube array heterostructures were synthesized by a simple and environmentally friendly method. The modified heterostructures showed improved performance in photoelectrocatalytic degradation and nitrogen fixation, indicating great potential for applications in photoelectrochemical and photoelectrocatalytic processes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Ceramics
Ramesh Kumar, Ahmad Umar, Rajesh Kumar, M. S. Chauhan, Yas Al-Hadeethi
Summary: ZnO-SnO2 nanocubes are used as efficient materials for detecting p-nitrophenol and quickly degrading dyes, with a low detection limit and high selectivity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
N. Sabry, H. Y. Zahran, El Sayed Yousef, H. Algarni, Ahmad Umar, Hasan B. Albargi, I. S. Yahia
Summary: This study focuses on investigating the gamma-ray interaction parameters of three different semiconductor compounds, with Cu2MnGeSe4 and Cu2MnGeTe4 showing higher MAC and LAC values compared to standard glass materials. Additionally, these semiconductor compounds have better neutron protection features and higher sensing abilities for gamma-rays and neutrons than traditional glassy materials.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
Rohit Sharma, Teenu Jasrotia, Rajeev Kumar, Raman Kumar, Ahmad Umar, Fahad A. Alharthi, Abdulaziz Ali Alghamdi, Nabil Al-Zaqri
Summary: This study aimed to develop a consortium of heavy metal resistant bacteria and found that two strains Bacillus cereus and Bacillus pumilus showed remarkable removal ability of Pb2+ and Ni2+ ions from wastewater samples. The mechanism of heavy metals removal was also investigated, providing important insights for future research in this area.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Physical
Rahul S. Salunke, Yogesh T. Nakate, Ahmad Umar, Umesh T. Nakate, Rafiq Ahmad, Dhammanand J. Shirale
Summary: The sensor electrode with gold nanoparticles (AuNPs) functionalized single polypyrrole nanowire (PpyNW) showed high sensitivity and an ultra-low detection limit during arsenic (III) detection in solution.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Yuanyuan Kong, Mingxuan Sun, Xiaofang Hong, Ying Wang, Ahmad Umar
Summary: The preparation of a MoS2/CdS/TiO2 nanotube heterostructure enhances visible light response and electron transfer efficiency.
MoS2 coatings significantly improve the photoelectrochemical stability of CdS/TiO2 nanotube arrays.
The heterostructure exhibits promising photoelectrochemical properties for potential applications.
Article
Chemistry, Physical
Bowen Gao, Mingxuan Sun, Zhipeng Ding, Wenzhu Liu
Summary: A paradigm for material synthesis is demonstrated with the guidance of machine learning and designed wet-lab experiments. The experiments are carefully designed to reveal the optimum synthesis parameters. More restrictions in data collection and the design of wet-lab experiments play crucial roles in facilitating machine learning.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wangbing Sun, Mingxuan Sun, Xianglong Meng, Yongqiang Zheng, Ziyang Li, Xiangzhi Huang, Muhammad Humayun
Summary: A series of alkynyl carbon functionalized N-TiO2 was successfully prepared by ball milling. The alkynyl carbon materials were successfully doped into N-TiO2, and the catalytic performance of alkynylated N-TiO2 for various organic dyes and NH3 production was significantly enhanced under visible light. The introduction of alkynyl carbon into semiconductor materials is a promising strategy for improving their photocatalytic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Xianglong Meng, Mingxuan Sun, Xiangzhi Huang, Ziyang Li, Junjie Zhao, Haohao Chen
Summary: In this study, a series of porous N-graphyne/g-C3N4 composites are fabricated via a facile hydrothermal process in the assistance of H2O2 to improve the pollutant removal rate of the promising g-C3N4-based photocatalysts. The as-prepared composites exhibit a maximum of 7.67-fold enhancement in photocatalytic degradation of rhodamine B compared to g-C3N4 under visible light, and the optimum removal ratios of RhB can reach 86.8% within only 9 minutes. Additionally, the superior photocatalytic stability of the composites is confirmed by five cycling tests.
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)
