Article
Chemistry, Physical
P. Corte-Leon, I. Skorvanek, F. Andrejka, V. Zhukova, J. M. Blanco, M. Ipatov, A. Zhukov
Summary: The temperature dependence of hysteresis loops and Giant magnetoimpedance (GMI) effect in amorphous FeSiBC microwires were studied. As-prepared microwires showed an improvement in GMI ratio and a modification in hysteresis loops with increasing temperature. The changes observed were almost completely reversible. In contrast, stress-annealed microwires exhibited a substantial improvement in GMI ratio, but a decrease in GMI effect with increasing temperature. The observed results were discussed in terms of relaxation of internal stresses, Hopkinson effect, and modification of thermal expansion coefficients.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Yongqi Xiao, Shuyi Zhu, Junjing Duan, Haomin Wang, Zhangyi Huang, Qingbei Meng, Yanzhang Liu, Yuelong Pan, Xin Wang, Jianqi Qi, Tiecheng Lu
Summary: New types of Gd2O3-Eu2O3-ZrO2 ceramics were successfully prepared and used as neutron absorbers in this study. The ceramic with 85 wt% Eu2O3 content exhibited a higher density, while the ceramic with 70 wt% Eu2O3 content had a higher Vickers hardness. This material is easy to prepare and possesses good properties, making it a potential reactor control rod material.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
P. Corte-Leon, V. Zhukova, M. Ipatov, J. M. Blanco, A. Zhukov
Summary: The influence of Joule heating on hysteresis loops and giant magnetoimpedance effect of Co69.2Fe3.6Ni1B12.5Si11Mo1.5C1.2 glass-coated microwire was studied. Joule heating can prevent magnetic hardening and lead to a remarkable improvement in GMI ratio compared to conventional furnace annealing. The observed magnetic softening and GMI ratio improvement are attributed to magnetic anisotropy induced by the Oersted magnetic field during Joule heating and relaxation of internal stresses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Shuntaro Muneta, Naoki Kawano, Daisuke Nakauchi, Takumi Kato, Daiki Shiratori, Hiroyuki Fukushima, Yuma Takebuchi, Kenji Shinozaki, Takayuki Yanagida
Summary: The luminescence and scintillation characteristics of Eu2O3-doped tellurite glasses were investigated. The samples exhibited multiple photoluminescence peaks and scintillation peaks originating from the 4f -> 4f transition of Eu3+. The afterglow levels decreased with increasing Eu2O3 concentration.
Article
Nanoscience & Nanotechnology
M. Salaheldeen, M. Ipatov, V. Zhukova, A. Garcia-Gomez, J. Gonzalez, A. Zhukov
Summary: In this article, the effect of annealing and the applied magnetic field on the magnetic behavior of Co2FeSi glass-coated microwires with ordered L2(1) structure prepared by Taylor-Ulitovsky technique was studied. The as-prepared and annealed samples exhibited ferromagnetic behavior in the measured temperature and magnetic field range. The annealed sample showed higher magnetization ratio, coercivity, and anisotropy field compared to the as-prepared sample. Irreversibility was observed in the annealed sample at lower magnetic fields, while it was absent in the as-prepared sample due to the mixed amorphous and crystalline structure. Increasing the magnetic field resulted in a gradual change in the magnetic behavior, with the irreversibility disappearing at a magnetic field of about 1 kOe.
Article
Materials Science, Multidisciplinary
A. Chizhik, P. Corte-Leon, V. Zhukova, J. Gonzalez, A. Zhukov
Summary: This article reports the distribution of helical magnetic structure induced by stress annealing in magnetic microwires. The longitudinal spatial distribution of magnetic anisotropy, originated from stress annealing at various annealing temperatures, is responsible for the observed effect. It has been found that the helicality of magnetic structure in different points of the microwire can be controlled by external mechanical torsion stress.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
P. Corte-Leon, V Zhukova, J. M. Blanco, M. Ipatov, S. Taskaev, M. Churyukanova, J. Gonzalez, A. Zhukov
Summary: This study thoroughly analyzed the magnetic properties of amorphous FeSiBC microwires using hysteresis loops and Giant magnetoimpedance (GMI) measurements, focusing on the influence of annealing on the GMI effect and magnetic properties. It was observed that stress annealing induced transverse magnetic anisotropy and improved GMI effect, with the reversibility of the induced anisotropy depending on annealing conditions. Further improvements in GMI effect were achieved by annealing without stress following stress annealing in Fe-Si-B-C microwires.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Xi Chen, Hongbo Zhang, Wentao Jia, Chunhui Su
Summary: Eu2O3-doped glass ceramics containing Na3Gd(PO4)(2) exhibit high transmittance in the visible light region and show promising red luminescent characteristics, making them suitable for potential applications in white LED technology.
Article
Materials Science, Multidisciplinary
Huayan Xia, Lihong Li, Mei Fang, Tim S. Jones, Junliang Yang
Summary: This study reports on the molecular-orientation-dependent magnetic properties of FePc thin films and microwires. The ability to control molecular orientation and ferromagnetism in FePc thin films and microwires makes them promising candidates for flexible spintronic devices.
ORGANIC ELECTRONICS
(2023)
Article
Chemistry, Physical
M. Salaheldeen, A. Garcia-Gomez, P. Corte-Leon, A. Gonzalez, M. Ipatov, V. Zhukova, J. Gonzalez, R. Lopez Anton, A. Zhukov
Summary: In this study, it was shown that the magnetic and structural properties of Ni2FeSi glass-coated microwires are strongly affected by the annealing conditions. Annealing increased the crystalline phase content and changed the hysteresis loop shape. The annealed samples also exhibited higher coercive and magnetic anisotropy fields, while the as-prepared samples showed reduced remanence. The temperature dependence of the coercivity was anomalous for both as-prepared and annealed samples. These results indicate the sensitivity of Heusler-based glass-coated microwires to temperature and annealing conditions, suggesting potential applications in spintronic devices and sensing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
P. Corte-Leon, V Zhukova, J. M. Blanco, M. Ipatov, S. Taskaev, J. Gonzalez, A. Zhukov
Summary: The study focused on the influence of post-processing on magnetic properties of Fe-rich microwires to obtain cost-effective microwires with unique magnetic properties. By modifying annealing conditions, significant improvements in GMI ratio and single DW dynamics were achieved, with consideration of the radial distribution of magnetic anisotropy and correlation of GMI effect and DW dynamics with hysteresis loops leading to interesting experimental results.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Analytical
Pi-Guey Su, Nok-Him Choy
Summary: Impedance-type humidity sensors based on EuCl2, Eu2O3, and EuCl2/Eu2O3 blend films were investigated for their electrical properties in relation to relative humidity. A 7 wt% EuCl2/Eu2O3 blend film exhibited the highest sensitivity, best linearity, and long-term stability among the tested sensors. The role of ions in the humidity-sensing behavior of the blend film was elucidated through complex impedance plots.
Article
Engineering, Chemical
Mohamed Salaheldeen, Ahmed Talaat, Mihail Ipatov, Valentina Zhukova, Arcady Zhukov
Summary: In this work, nanocrystalline Co2MnSi Heusler alloy glass-coated microwires were successfully fabricated for the first time. The microwires showed well-defined crystalline structures and unique magnetic behavior at a wide range of temperature and magnetic fields, making them promising for magnetic sensing and spintronic applications.
Article
Chemistry, Analytical
Alvaro Gonzalez, Alfonso Garcia-Gomez, Valentina Zhukova, Paula Corte-Leon, Mihail Ipatov, Juan Maria Blanco, Julian Gonzalez, Arcady Zhukov
Summary: This study investigates the effects of conventional annealing and Joule heating on the magnetic domain wall dynamics and giant magnetoimpedance (GMI) effect in Fe-rich microwires with different geometries. The results show that magnetic softness, GMI effect, and domain wall dynamics can be substantially improved by appropriate annealing.
Article
Materials Science, Multidisciplinary
Xian Zhang, Xucai Kan, Min Wang, Rui Rao, Ganhong Zheng, Meiling Wang, Yongqing Ma
Summary: The study investigates the effects of pressure on the magnetic interactions and macroscopic magnetic properties of CoFe2O4. Results show that pressure enhances the exchange coupling effect in the material, affecting the magnetic moments and anisotropy at different temperatures.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Cheng Chen, Zi-Jun Tang, Jia-Yi Li, Cong-Yi Du, Ting Ouyang, Kang Xiao, Zhao-Qing Liu
Summary: In situ growing transition metals on N-doped carbon by atomic doping presents a potential alternative to replace Pt-based catalysts for redox reactions. This study presents a simple synthetic strategy to fabricate a highly active and durable MnO modifying Co-N-x/C catalyst. The interphase engineering effectively controls the composition of the material, and the interaction between Co-N-x and MnO phase is also discussed. The resulting catalyst exhibits excellent electrocatalytic properties and durability in acidic and basic solutions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Li-Ming Wan, Qiu-Ying Xia, Jiang-Hua Wu, Jing Liu, Zheng-Yi Shi, Si Lan, Teng Zhai, Serguei V. Savilov, Sergey M. Aldoshin, Hui Xia
Article
Nanoscience & Nanotechnology
Qiu-Ren Pan, Bi-Lin Lai, Li-Juan Huang, Yan-Nan Feng, Nan Li, Zhao-Qing Liu
Summary: In this study, a three-dimensional hierarchical porous copper, nitrogen, and boron codoped carbon catalyst was synthesized, which exhibited excellent oxygen reduction reaction (ORR) performance and stability. The introduction of boron atoms increased the electron density around the active site, promoting the efficiency of the ORR process and preventing demetallization. This research provides a new approach for the development of Cu-based ORR electrocatalysts and guidance for high-performance microbial fuel cells (MFCs) design.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zepan Wang, Peiyuan Wu, Xubing Zou, Sheng Wang, Lei Du, Ting Ouyang, Zhao-Qing Liu
Summary: By partially replacing Co3+ with the more electro-negative Mn3+ ion at the octahedral site, a ternary Zn-Mn-Co spinel oxide is formed, leading to a significant increase in electrocatalytic oxygen reduction/evolution activity. Physical characterization and theoretical calculations show that bond competition plays a crucial role in regulating the cobalt valence state and the electrocatalytic activity. The partial replacement of Co3+ by Mn3+ effectively modulates the adjacent Co-O bond and induces the Jahn-Teller effect, resulting in a change in crystal structure and optimization of the binding strength with reaction intermediates. The Mn-substituted ZnMn1.4Co0.6O4/NCNTs exhibit higher electrocatalytic activity than ZnCo2O4/NCNTs and ZnMn2O4/NCNTs, indicating that the covalency of the Co-O bond determines the oxygen reduction reaction (ORR) activity of spinel ZnCo2O4. This study introduces the competition between adjacent Co-O and Mn-O bonds through the B-Oh-O-B-Oh edge-sharing geometry, demonstrating that ion substitution at octahedral sites with less electronegative cations can effectively enhance the electrocatalytic performance of cobalt-based spinel oxides.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zehong Chen, Xinwen Peng, Zhongxin Chen, Tingzhen Li, Ren Zou, Ge Shi, Yongfa Huang, Peng Cui, Jian Yu, Yuling Chen, Xiao Chi, Kian Ping Loh, Zhaoqing Liu, Xuehui Li, Linxin Zhong, Jun Lu
Summary: The by-product of the papermaking industry, lignosulfonate, is used as a bioligand to produce single-atom catalysts (SACs) with highly active M-N-4-S sites (M represents Fe, Cu, and Co) through metal-nitrogen/sulfur coordination. This study demonstrates that the SACs produced have excellent catalytic performance in oxygen reduction and evolution reactions for Zn-air batteries, paving the way for the industrial production of cost-effective SACs in a sustainable manner.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Si -Tong Guo, Zi-Yuan Tang, Ting Liu, Ting Ouyang, Zhao-Qing Liu
Summary: In this study, a chlorine (Cl)-modified Cu2O/ZnO heterostructure photocathode (CCZO) with high CH4 faradaic efficiency (88.6%) and durability (over 5 h) is presented. The Cl ions in CCZO stabilize Cu2O against photo-corrosion and promote the hydrogenation of *CO intermediate, leading to the selective reduction of CO2 to CH4. The catalytic mechanism of CCZO in modulating the energy barrier of intermediate *CO combined with H+ is elucidated, providing a new idea for developing high selectivity and stable catalysts for CO2 reduction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Electrochemistry
Jiexin Chen, Xingxin Luo, Hanwen Zhang, Xianxi Liang, Kang Xiao, Ting Ouyang, Meng Dan, Zhao-Qing Liu
Summary: Promoting the dissociation of water and desorption of hydrogen is crucial for improving the hydrogen evolution reaction (HER) activity and stability in alkaline media. In this study, a polyaniline-coated CoRu-LDH (CoRu-LDH/PANI) nanowire array electrocatalyst is demonstrated to be efficient and stable for alkaline HER. The CoRu-LDH/PANI exhibits excellent HER activity with low overpotentials at large current densities, surpassing the benchmark Pt/C and the pristine CoRu-LDH. The PANI coating not only enhances the HER performance by regulating the electronic structure and reducing the binding strength to hydrogen intermediates, but also provides a superhydrophilic surface for electrolyte and bubble transport, contributing to the long-term stability.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Xiuying Li, Jiayue Hu, Yuepeng Deng, Tong Li, Zhao-Qing Liu, Zhu Wang
Summary: In this study, a Fenton-like catalyst with dual-photo-functional sites of iron phosphide (FeP) and Fe single atom-graphene oxide (Fe1-GO) nanocomposite was developed for the degradation of antibiotic tetracycline (TC) pollutants. The FeP/Fe1-GO catalyst exhibited significantly higher efficiency in TC degradation under visible light irradiation compared to single component catalysts. Moreover, the catalyst demonstrated excellent stability with 100 cycles of recycling and a wide pH range tolerance from 3-11. The study also provided insights into the TC degradation pathway and the toxicity of intermediate products.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Shangyu Hu, Yaxiong Zhan, Peilei Wang, Jingfei Yang, Fengxiu Wu, Meng Dan, Zhao-Qing Liu
Summary: The production of hydrogen peroxide (H2O2) through electrochemical oxygen reduction is a convenient and clean approach. A universal urotropine modified carbon-based catalyst was developed, which not only provides isolated O-2 active sites to protect OOH* from further splitting, but also excites the carbon nanotube matrix to produce abundant secondary O-2 active sites. Furthermore, the end-on type adsorption of O-2 on the excited secondary reactive sites can be stabilized by the hydrogen bond effect, leading to a significant increase in H2O2 productivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhilong Jiang, Weiya Liu, Jun Wang, Bangtang Chen, Zihao Wu, Fan Fu, Rui Miao, Ting Ouyang, Wenzhi Lv, Yongchao Huang, Die Liu, Zhao-Qing Liu, Mingzhao Chen, Pingshan Wang
Summary: The design and synthesis of two bipyridyl and terpyridyl ruthenium(II) building units L1 and L2 were explained, and two different triangle self-assembled supramolecules S1 and S2 were successfully synthesized. The study of S2 showed that it maintains high luminous performance at ambient temperature, opening up new possibilities for the rational molecular design of terpyridyl ruthenium fluorescent materials and catalytic functional materials.
INORGANIC CHEMISTRY
(2023)
Article
Polymer Science
Zhilang Liu, Zhaoqing Liu, Bo Shu, Cuixia Lian, Jialin Wu, Qing Wen, Jiahuan Wu, Zhuohong Yang, Wuyi Zhou, Yang Hu
Summary: Flexible and biodegradable polymer hydrogels are widely studied for biomedical applications, but achieving satisfactory mechanical performance, anti-swelling behavior, antibacterial activity and conductivity in one single hydrogel is still challenging. Researchers have developed a simple one-pot approach to prepare multiple-crosslinked PVA/PA-Fe hydrogels with favorable mechanical properties, anti-swelling behavior, antibacterial activity, and conductivity.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Rui Liu, Difu Zhan, Dong Wang, Changcun Han, Qian Fu, Hongxun Zhu, Zhuxiang Mao, Zhao-Qing Liu
Summary: Photoelectrochemical (PEC) splitting water technology has gradually matured over the years. Photoanodes loaded with metal nanoparticles (NPs) show excellent PEC performance. This study used noble metal nanoparticles Ag and Au to modify BiVO4 and investigate its PEC performance. The results showed that Ag/BiVO4 and Au/BiVO4 photoanodes had higher photocurrent densities and hydrogen evolution capacity compared to pure BiVO4. Through the research, it was found that the composite noble metal NPs can improve the PEC properties by introducing a surface plasmon resonance effect to enhance carrier concentration and separation. In conclusion, loading noble metal NPs is an effective method to enhance the water oxidation kinetics of BiVO4 photoanodes.
Article
Chemistry, Multidisciplinary
Si-Tong Guo, Yu-Wei Du, Huihua Luo, Ziyin Zhu, Ouyang Yang, Zhao-Qing Liu
Summary: Zn-based catalysts have great potential for CO2 reduction, and undercoordinated Zn sites can enhance CO production. However, the dynamic evolution and stability of Zn delta+ sites during CO2 reduction process are less explored. The study shows that Zn delta+ sites can suppress HER and HCOOH production to induce CO generation, and CeO2 nanotubes can stabilize Zn delta+ species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Can-Wen Yu, Cong-Yi Du, Ting Ouyang, Xi-Ting Zhang, Zhao-Qing Liu
Summary: Physical structure change of catalysts based on the electronic metal-support interaction effects is a prospective strategy to enhance their catalytic performance. In this study, Ag and MnCo2O4 supported on N-doped carbon nanotubes were synthesized using a facile hydrothermal and photoreduction strategy, and exhibited enhanced performance for oxygen evolution reaction and oxygen reduction reaction. Theoretical calculations showed that the introduction of Ag optimized the adsorption properties and lowered the reaction activation energy, providing new insights for the fabrication of advanced oxygen electrocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Jingwei Li, Zhengyi Huang, Cong Wang, Lei Tian, Xiaoqing Yang, Rongfu Zhou, Mohamed Nawfal Ghazzal, Zhao-Qing Liu
Summary: In this research, the efficient transfer of photoexcited carriers was achieved by introducing amorphous carbon into bandgap-broken heterojunctions. The formation of similar orbital energies enabled the migration of electrons and holes to the amorphous carbon, thereby enhancing carrier separation in the heterojunction. By controlling the relative amount of metal-O-C bonds at the interface, the charge transfer kinetics could be modulated, resulting in a significant increase in H2 generation. This strategy can be extended to other carbon allotropes, demonstrating its universality in optimizing charge transfer in broken-bandgap heterojunctions for photocatalytic H2 production.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
