Article
Physics, Applied
Ping Wu, Wenshu Yang, Jun Sun, Gaohui Wu
Summary: This paper proposes a novel composite cathode mixing CNTs with metals, which demonstrates a much longer lifetime under high voltage and frequency conditions compared to normal copper cathodes. Microscopic morphology analysis reveals that CNT micro-protrusions and whiskers are crucial for the good emission properties of the new cathode.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Carlos Guerra-Nunez, Barbara Putz, Raluca Savu, Meng Li, Yucheng Zhang, Rolf Erni, Stanislav Mochkalev, Johann Michler, Hyung Gyu Park, Ivo Utke
Summary: This study proposes the radial growth per cycle (rGPC) to quantify the growth process of ALD films on carbon nanotube surfaces, showing that TiO2 nuclei grow from defects to pristine surfaces and are constrained by Van der Waals forces. In-situ Raman measurements determine the growth rate of nuclei and the film closure point, inducing a finite compressive stress on the nanotubes.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
H. A. Borbon-Nurnez, D. Dominguez, M. Herrera-Zaldivar, J. M. Romo-Herrera, R. C. Carrillo-Torres, F. F. Castill, O. E. Contreras-Lopez, G. Soto, H. Tiznado
Summary: This study investigates the intrinsic defects of ZnO atomic layer deposited on carbon nanotubes and their evolution after annealing in a nitrogen atmosphere. The results show the effect of different conditions on the evolution of ZnO structure and the impact of intrinsic defects on photocatalytic activity.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Siru He, Xuda Hong, Hairong Zheng, Dong Liang
Summary: The study demonstrates that modifying the commonly used compact and planar titanium alloy substrate using an alkali approach can enhance the adhesion with screen-printed carbon nanotube cathodes and significantly improve device performance, providing a practical strategy for further enhancement of field emission performance.
Article
Nanoscience & Nanotechnology
Yucheng Ou, Gangqiang Zhu, Fei Rao, Jianzhi Gao, Jun Chang, Xiaotao Xie, Weibin Zhang, Yu Huang, Mirabbos Hojamberdiev
Summary: By introducing oxygen vacancies to TiO2-delta and decorating with CNTs and N-CQDs, the generation of active species promoted deep oxidation and selective conversion of NO into nitrate. The adsorption and reaction sites for H2O and O-2 separately in space over the surface of TiO2-delta CNTs/N-CQDs were revealed through density functional theory calculations, demonstrating high efficiency and selectivity for NO removal.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Qianyu Ji, Bowen Wang, Yajuan Zheng, Xueping Yan, Fanguang Zeng, Bingheng Lu
Summary: The study introduces bulk graphene/carbon nanotubes hybrid materials for field emission applications, showcasing excellent stability and high efficiency. These bulk emitters are suitable for high-power cold cathode applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Shuai Tang, Yu Zhang, Peng Zhao, Runze Zhan, Jun Chen, Shaozhi Deng
Summary: The study focused on enhancing the heat dissipation of few-layer graphene (FLG) by introducing a graphite interlayer between FLG and a tungsten substrate. This approach effectively reduced the temperature and the risk of vacuum breakdown, resulting in improved high-current field emission characteristics of single FLG samples.
Article
Multidisciplinary Sciences
Sohail Ahmad, Kashif Ali, Kottakkaran Sooppy Nisar, Aftab Ahmed Faridi, Nargis Khan, Wasim Jamshed, T. M. Yunus Khan, C. Ahamed Saleel
Summary: The recent study examines the heat transfer properties in engine oil flow containing nanoparticles, using quasi-linearization numerical technique to solve complex coupled differential equations and obtain numerical solutions. The research finds that the flow and heat transfer of Cu-TiO2 in the flow are significantly affected by thermal jump conditions and porous media, resulting in a reduction of temperature and heat transport rate under preeminent parameters.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Jiuzhou Zhao, Zhenjun Li, Matthew Thomas Cole, Aiwei Wang, Xiangdong Guo, Xinchuan Liu, Wei Lyu, Hanchao Teng, Yunpeng Qv, Guanjiang Liu, Ke Chen, Shenghan Zhou, Jianfeng Xiao, Yi Li, Chi Li, Qing Dai
Summary: This study developed a UV laser beam patterning technique to reliably fabricate nanocone-shaped carbon nanotubes field-emitter array (NCNA) with a cone-tip radius of approximately 300 nm, providing smaller turn-on fields and higher and more stable emission in emitters compared to unpatterned counterparts. This technique may be widely applied in the fabrication of high-performance CNTs field-emitter arrays.
Article
Chemistry, Applied
Raviteja Surakasi, Srujana Sripathi, Sarada Purnima Nadimpalli, Sibtain Afzal, Bharat Singh, Manoj Tripathi, Rahel Alemu Hafa
Summary: This study focuses on nanofluids made of TiO2 and multiwalled carbon nanotubes, exploring their stability and surface modification approaches. It provides an in-depth analysis and evaluation in this field.
ADSORPTION SCIENCE & TECHNOLOGY
(2022)
Correction
Materials Science, Multidisciplinary
Xinchuan Liu, Yuanxun Li, Jianfeng Xiao, Jiuzhou Zhao, Chi Li, Zhenjun Li
Summary: The study investigates the field emission stability of vertically aligned carbon nanotubes through anchoring for X-ray imaging applications. The results demonstrate that anchoring plays a crucial role in enhancing the field emission performance and stability of carbon nanotubes.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Rikiya Kikukawa, Yasushi Ohkawa, Yoshiki Yamagiwa
Summary: An experimental setup and procedure were developed to improve the electron emission stability in the long-term operation of carbon nanotube-based field emission cathodes (FECs). By using Xe plasma processing aging method, optimal plasma processing conditions were found to enhance the emission stability and extend the lifetime of FECs.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Physics, Multidisciplinary
Yunliang Liu, Peiji Deng, Ruqiang Wu, Ramadan A. Geioushy, Yaxi Li, Yixian Liu, Fengling Zhou, Haitao Li, Chenghua Sun
Summary: This study developed a BiVO4/TiO2 nanotube heterojunction composite as an efficient electrocatalyst for nitrogen reduction reaction, with high ammonia yield and Faraday efficiency.
FRONTIERS OF PHYSICS
(2021)
Article
Chemistry, Analytical
Changkun Dong, Ruizi Liu, Jie Wang, Haipeng Yu, Song Kang, Weijun Huang, Weikang Jia, Weijin Qian
Summary: A novel low pressure helium sensing method using carbon nanotube field emission has been developed, showing promising applications in leak detection. By analyzing the field emission currents from multi-walled carbon nanotubes with low crystallinities, it was found that the work functions of CNT emitters remained consistent with helium adsorptions. The simulation results showed that adsorption of helium atoms on carbon atoms at defects enhanced the field emission current, enabling the detection of helium gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Zhihui Hu, Huanmin Liu, Ningxin Kang, Kangle Lv, Qin Li
Summary: Using solvothermal methods, two-dimensional titanium carbide (Ti3C2TX) MXene was oxidized in situ into TiO2 nanocrystals, providing an effective strategy for constructing highly efficient TiO2/Ti3C2TX heterojunctions for photocatalytic applications. The choice of solvent during the process was found to have a significant impact on the oxidation and performance of Ti3C2TX. This work highlights the importance of the oxidation environment for Ti3C2TX and brings about new considerations for the processing techniques of MXene families for practical applications.
APPLIED SURFACE SCIENCE
(2023)
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)