Article
Energy & Fuels
Xianchao Wang, Yongchao Xu, Leijun Shao, Yuyao Wei, Xiangyu Zhang, Xinhao An, Junnan Liu, Chunliang Zhou, Ye Chen, Guiling Wang
Summary: In this study, NiCoP material was directly grown on the nickel foam substrate through hydrothermal and low temperature phosphating methods. The resulting NiCoP/rGO-NF electrode demonstrated a specific capacitance of 2137.8 F g-1 at 1 A g-1 current density and a specific capacitance retention of 86.5% after 10,000 cycles at a current density of 5 A g-1. The assembled ASC device exhibited an energy density of 54.25 W h kg-1 at a power density of 750 W kg -1. NiCoP/rGO-NF//AC showed a capacity retention rate of 87.3% after 10,000 cycles at a current density of 5 A g-1, indicating its potential as an excellent electrode material for supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Polymer Science
Marta Kubovics, Claudia G. Silva, Ana M. Lopez-Periago, Joaquim L. Faria, Concepcion Domingo
Summary: In this study, composites of reduced graphene oxide (rGO) aerogels supporting Pt/TiO2 nanoparticles were synthesized using a one-pot supercritical CO2 gelling and drying method. The photocatalytic production of H-2 from methanol in aqueous media was evaluated, and optimization of the reaction conditions and aerogel composition and architecture resulted in a remarkably high H-2 production rate.
Article
Chemistry, Physical
Zhaoqing Li, Zhufeng Liu, Xiao Yang, Annan Chen, Peng Chen, Lei Yang, Chunze Yan, Yusheng Shi
Summary: In this study, in situ TiO2 was grown on the surface of graphene to form black TiO2/graphene composites with enhanced photocatalytic activity. The combination of graphene and TiO2 helped eliminate recombination of electron holes, and the introduction of self-doping Ti3+ during hydrogenation process resulted in a narrowed bandgap and enhanced visible light absorption. The valence band XPS analysis of the composite revealed the reason for its high visible light catalytic performance. The synthesized black TiO2/graphene composites showed promising potential for applications in environmental and energy issues.
Article
Chemistry, Physical
Beata Tryba, Piotr Miadlicki, Piotr Rychtowski, Maciej Trzeciak, Rafal Jan Wrobel
Summary: Acetaldehyde decomposition was studied on TiO2 doped with metallic Ni powder and TiO2 supported on nickel foam under heating at temperatures of 25-125 °C and UV irradiation. The highest conversion of acetaldehyde on TiO2 and UV irradiation was achieved at 75 °C. Doping Ni to TiO2 did not enhance its photocatalytic activity, but using nickel foam as a support greatly improved the decomposition of acetaldehyde and increased the mineralization of acetaldehyde to CO2. However, oxidized nickel foam as a support was detrimental to the reaction. The application of nickel foam in this study significantly enhanced the separation of free carriers in TiO2 and thus improved the photocatalytic reaction yields.
Article
Chemistry, Physical
W. Strek, W. Mista, P. Wiewiorski, R. Tomala
Summary: Efficient hydrogen emission from ethanol using disperse graphene foam particles and continuous wave infrared laser diode was achieved through the focused laser beam irradiation, which induced multiphoton ionization of graphene and simultaneous emission of hot electrons.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Binchang Hua, Huifang Kang, Jingyan Zhong, Xiaoling Zhan, Lanqing Xu, Jiaxin Li, Yongping Zheng, Zhifeng Zheng
Summary: The GDY/EG composite materials show excellent electrochemical performance and stability, demonstrating high reversible capacity and outstanding rate capability in lithium-ion batteries. The composite structure of graphdiyne and graphene facilitates electron transport and reduces aggregation polarization, leading to a more uniform interface film.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Kefayat Ullah, Won-Chun Oh
Summary: Novel visible-light photocatalyst TiO2-FG/Sr-hexaferrite nanocomposites were fabricated using a simple hydrothermal technique, and their properties were analyzed using various techniques. The unique composite catalyst showed superior photocatalytic properties for the disintegration of organic dyes under visible-light irradiation due to the synergistic effect of TiO2-FG and the fast conducting path provided by the graphene surface. The ternary structure between TiO2, FG, and Sr-hexaferrites also contributed to the high photocatalytic behavior.
Article
Chemistry, Applied
Patricia Garcia-Munoz, Javier Ivanez, Victor A. de la Pena O'Shea, Nicolas Keller, Fernando Fresno
Summary: In this study, the feasibility of using alveolar open-cell beta-SiC foams as a catalyst support for solar hydrogen production was explored. Pt and Ru nanoparticles were obtained through photoassisted synthesis and tested for gas-phase hydrogen production from water-ethanol mixtures. The foam-supported photocatalysts, including Pt/TiO2 and Ru/TiO2, showed activity in solar photocatalytic reactions, with Pt/TiO2 being the most active. The foam pore size had little influence on hydrogen outcome, and a UV-to-hydrogen conversion efficiency of 14% (equivalent to 0.49% solar-to-hydrogen) was achieved under the best conditions, with a photonic efficiency higher than 30%.
Article
Nanoscience & Nanotechnology
Thanh-Lieu T. Le, Thanh-Hiep T. Le, Kim Nguyen Van, Hao Van Bui, Truong Giang Le, Vien Vo
Summary: This study presents the controlled synthesis of TiO2/graphene photocatalysts, which show excellent photocatalytic activity under visible light for degrading organic dyes. The coupling of graphene with TiO2 significantly enhances the photocatalytic performance of TiO2, and an appropriate loading of TiO2 contributes to improving the degradation efficiency of the catalyst.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2021)
Review
Engineering, Environmental
Kunal G. Thakre, Divya P. Barai, Bharat A. Bhanvase
Summary: Advancements in nanomaterials have provided new methods for wastewater treatment, particularly semiconductor materials like TiO2 and ZnO showing promising applications in photocatalytic wastewater treatment. Graphene nanocomposites are also being extensively researched for environmental remediation due to their superior properties, such as physical, optical, thermal, and electronic capabilities.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Martina Sciarretta, Mariam Barawi, Cristina Navio, Victor A. de la Pena O'Shea, Matias Blanco, Jose Aleman
Summary: This study presents the immobilization of TiO2 nanoparticles on graphene acid (GA) and investigates the resulting material's photocatalytic activity in the synthesis of 1,3,4-oxadiazoles. The GA-TiO2 composite exhibits enhanced photoactivity compared to bare TiO2 and demonstrates recyclability and stability. The efficient synthesis of a variety of oxadiazoles highlights the optimal performance of this multifunctional photocatalytic material.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Ruiyang Chen, Dongxu Lai, Duoxiao Wang, Jinan Niu, Jian He, Peizhong Feng, Hermenegildo Garcia
Summary: A kaolinite-TiO2-graphene oxide composite photocatalyst with a porous stacking structure was synthesized through a controlled-addition strategy. The photocatalytic performance of the composite was improved by incorporating graphene oxide and forming a stacking structure, showing potential for practical applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Green & Sustainable Science & Technology
T. T. Wang, S. C. Lim, C. L. Chiang, Y. J. Shen, P. Raghunath, J. R. Li, Y. G. Lin, M. C. Lin
Summary: A composite photoelectrode B-nGO/H:(NiO/TiO2) NTs with a unique heterostructure nanotube arrays was synthesized. The p-n junction created between p-type NiO and n-type TiO2 facilitates the electron-hole pair separation and interfacial electron transfer. The introduction of boron-doped reduced nanographene oxide nanoparticles (B-nGO NPs) and hydrogenation treatment further optimize the electron-hole separation and enhance the electron transfer. The as-synthesized B-nGO/H:(NiO/TiO2) NTs exhibit a high photocurrent density and an effective photoconversion efficiency under simulated sunlight irradiation.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Chemistry, Physical
Zhuquan Huang, Jiaqi Wang, Suwei Lu, Hun Xue, Qinghua Chen, Min-Quan Yang, Qingrong Qian
Summary: This research demonstrates that controlling the quality of graphene can significantly improve photocatalytic performance, with high-quality CVDG-TiO2 composites showing 26.2 times and 10 times higher photocatalytic hydrogen evolution activity compared to bare TiO2 and reduced graphene oxide (RGO)-TiO2, respectively. Experimental characterization reveals that few-layer CVDG with low defect density can better unleash the electrical conductivity potential of graphene, leading to improved separation and lifetime of photoexcited charge carriers in graphene-TiO2.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Zhenzi Li, Shijie Wang, Jiaxing Wu, Wei Zhou
Summary: TiO2 nanomaterial photocatalysts have received extensive research interest for energy and environmental applications. The main challenges are the large bandgap and charge-carrier recombination. Recent reports suggest that engineering the defects of TiO2 can enhance photoresponse and promote charge separation efficiency. This review summarizes the synthesis strategies for defective TiO2, especially black TiO2 nanomaterials, and discusses their applications, defect types, characteristics, and photocatalytic mechanism in detail.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Optics
Lu Guo, Bo Xu, Haobin Chen, Ying Tang
Summary: Photodynamic therapy (PDT) is a new and rapidly developing treatment modality for clinical cancer therapy. This study developed a nanoplatform for PDT using semiconductor polymer dots (Pdots) doped with photosensitizer molecule Chlorin e6 (Ce6) and photochromic molecule 1,2-bis(2,4-dimethyl-5-phenyl-3-thiophene)-3,3,4,5-hexafluoro-1-cyclopentene (BTE). The Ce6-BTE-doped Pdots exhibited increased tissue penetration depth compared to other Pdots, and the reversible conversion of BTE under different light irradiation was utilized to regulate the photodynamic effect and solve the problem of photosensitivity.
JOURNAL OF INNOVATIVE OPTICAL HEALTH SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Yifei Jiang, Jicheng Zhang, Seung-Ryoung Jung, Haobin Chen, Shihan Xu, Daniel T. T. Chiu
Summary: The researchers overcame the limitation of single-molecule localization microscopy by developing a new type of structured and highly dispersed single-particle spectra of photoswitching semiconducting polymer dots (Pdots). By using the ratio of peak intensities as spectral coding and performing 4-9 frame binning, they achieved a 2-3 fold experimental resolution improvement compared to conventional superresolution imaging. This method was applied to count and map SV2 and proton ATPase proteins on synaptic vesicles (SVs), revealing highly precise trafficking and organization of these proteins with unprecedented detail about the composition and structure of SVs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zihan Yao, Xiaodong Wang, Jie Liu, Siyu Zhou, Zhe Zhang, Shuwen He, Jing Liu, Changfeng Wu, Xiaofeng Fang
Summary: Two photoswitchable semiconducting polymers were synthesized by incorporating photochromic dithienylethene (DTE) into the main chains. Small size polymer dots (Pdots) exhibited dynamic photoswitching behavior upon alternate light irradiation. With the tunable photoswitching properties, effective pattern encoding and superresolution imaging with a resolution of up to about 30 nm were achieved.
CHEMICAL COMMUNICATIONS
(2023)
Article
Optics
Xiaodong Wang, Dayan Li, Zhihe Liu, Xiaofeng Fang, Jiani Li, Tianyue Shi, Changfeng Wu
Summary: In the past decade, various methods have been proposed for optical imaging through scattering media. Among them, the speckle deconvolution method utilizing the optical memory effect of the medium is widely used due to its advantages in speed and setup simplicity. However, its practical applications are limited due to the requirement of direct incoherent illumination in existing systems. This study introduces an imaging system in reflection configuration, which can perform speckle deconvolution to retrieve hidden fluorescent objects behind thin scattering media.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Yanhui Dong, Dan Zhang, Daguang Li, Heng Jia, Weiping Qin
Summary: This study introduces the concepts of critical concentration and time window as the keys to inhibiting Ostwald ripening, and successfully achieves the controllable synthesis of high-quality nanocrystals through precise controls.
SCIENCE CHINA-MATERIALS
(2023)
Review
Chemistry, Analytical
Sile Deng, Lingfeng Li, Jiaxi Zhang, Yongjun Wang, Zhongchao Huang, Haobin Chen
Summary: In recent years, semiconducting polymer dots (Pdots) have gained significant attention for their exceptional photophysical properties and versatility in various applications. They have been widely used in sensing and imaging in biological medicine due to their large absorption cross section, high brightness, tunable fluorescence emission, excellent photostability, good biocompatibility, facile modification, and regulation. Furthermore, Pdots have shown great promise as optical diagnostic technologies for clinical applications, especially in point-of-care biosensing and in vivo imaging. This review provides an overview of Pdots' preparation and modification strategies, discusses recent progress in the development of Pdots-based optical probes for analytical detection and biomedical imaging, and presents the challenges and future directions for their biomedical applications.
Article
Engineering, Biomedical
Xiaoju Men, Xiaorui Geng, Zhe Zhang, Haobin Chen, Meng Du, Zhiyi Chen, Gang Liu, Changfeng Wu, Zhen Yuan
Summary: Glioma, a primary malignant brain tumor with a short survival time, is difficult to diagnose and treat due to the blood-brain barrier and low treatment efficacy. This study developed C6 cell membrane-coated conjugated polymer dots for targeted glioma tumor detection, demonstrating promising specific targeting capabilities. These biomimetic nanoparticles offer a potential tool to enhance specific targeting to the brain and improve glioma tumor detection accuracy.
MATERIALS TODAY BIO
(2022)
Article
Materials Science, Biomaterials
Jingyu Xiao, Dishuang Yang, Xiaofeng Fang, Xiaoya Liu, Xuezhe Liu, Le Ma, Ziyan Wang, Changfeng Wu, Qiongyu Guo
Summary: Photothermal therapy has limitations in treating deep tissues due to the limited penetration depth of light. To overcome this, the strategy of endovascular photothermal precision embolization (EPPE) is introduced, which uses an endovascular optical fiber to induce local embolization and block the blood supply of the whole tumor. EPPE uses a highly efficient and biocompatible photothermal agent, which effectively kills cells both in 2D and 3D models. The feasibility of EPPE is verified in ex vivo liver models and in vivo rat liver models.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Acoustics
Kuan Peng, Yongjun Wang, Lingfeng Li, Jiaxi Zhang, Haobin Chen, Jiaying Xiao
Summary: In this study, the distribution of effective photothermal agents and temperature in subcutaneously transplanted tumor mouse models were continuously monitored by 3D photoacoustic/ ultrasonic dual-modality imaging in 8 h after administration. The PA thermometer was calibrated and evaluated at multiple spatial positions for the first time, verifying its generalization in homologous tissue and tissue specificity in heterogeneous tissues. The positive correlation between the proportion of effective treatment area and the proportion of effective photothermal agent area in the tumor was observed, suggesting the potential of using PA imaging as a convenient tool for seeking optimal administration-treatment interval.
Article
Chemistry, Multidisciplinary
Dandan Chen, Weizhi Qi, Ye Liu, Yicheng Yang, Tianyue Shi, Yongchao Wang, Xiaofeng Fang, Yingjie Wang, Lei Xi, Changfeng Wu
Summary: Researchers have developed a method for high-contrast vascular imaging in deep tissues using fluorescent probes and imaging algorithms. By improving the brightness and compactness of the probes, and enhancing the image contrast using the Hessian matrix method, they achieved high-resolution imaging of small blood vessels. This study provides a promising approach for NIR-II fluorescence imaging of vascular structures in deep tissues.
Article
Biochemical Research Methods
Siyu Zhou, Xiaofeng Fang, Jiahui Lv, Yicheng Yang, Yiqi Zeng, Ying Liu, Weijun Wei, Gang Huang, Bo Zhang, Changfeng Wu
Summary: The immobilization of microbial transglutaminase (mTGase) on magnetic beads provides a facile and reliable strategy for the site-specific modification of nanobodies. This method exhibits high catalytic activity, good reusability, and universality, simplifies protein purification, and reduces the loss of nanobody bioconjugates effectively. It enables site-specific conjugation of nanobodies, facilitating targeted immunofluorescence imaging and improved in vivo circulation dynamics.
BIOCONJUGATE CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Daguang Li, Hao Cui, Guanshi Qin, Weiping Qin
Summary: Under intense light irradiation, pure-white objects exhibit strong light absorption capabilities similar to blackbodies, and generate photon avalanche optical frequency conversion and optical bistable luminescence.
COMMUNICATIONS PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Xiaoju Men, Xiaofeng Fang, Zhihe Liu, Zhe Zhang, Changfeng Wu, Haobin Chen
Summary: This study demonstrates a facile approach to control the morphology of conjugated polymers, resulting in anisotropic nanostructures. These nanostructures exhibit shape-dependent optical properties and significant fluorescence enhancement, showing potential applications in the fabrication of multicolor fluorescent nanowires.
Article
Materials Science, Multidisciplinary
Heng Jia, Yingyue Teng, Nan Li, Daguang Li, Yanhui Dong, Dan Zhang, Zhihe Liu, Dan Zhao, Xingyuan Guo, Weihua Di, Weiping Qin
Summary: This article reports a new strategy for constructing a dual stimuli-responsive multicolor security ink, which allows visualization of hidden information through switching luminescence outputs and pH stimulation, and exhibits robust stability.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Zhe Wang, Xueshuang Li, Shengyan Yin, Xingyuan Guo, Weiping Qin
Summary: Cubic silver phosphate nanoparticles with high photocatalytic activity were successfully prepared with the assistance of trisodium citrate. The photocatalytic activity of Ag3PO4 NPs was verified through photodegradation experiments, and their characteristics were studied using various characterization methods.
NEW JOURNAL OF CHEMISTRY
(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)
