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Improved ammonia sensing performance of Nd-modified nano-BaTiO3 at room temperature

Journal of Alloys and Compounds 2025年 1033卷

作者： Hu, Ruize Hao, Hua Cheng, Jingsai Feng, Feiyang Guo, Qinghu Yao, Zhonghua Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China

In this study, BaTiO3 doped with Nd ions (Ba1-xNdxTiO3, x = 0 ∼ 0.02) nanoparticles were prepared by hydrothermal method, and their gas sensitivity to NH3 at room temperature was investigated. Compared with BaTiO3, the particle size of Nd doped BaTiO3 powder decreases and the specific surface area increases. At the same time, the gas-sensitive performance on NH3 is enhanced, which is mostly due to that the increased concentration of oxygen vacancy and adsorbed oxygen promote the reaction between adsorbed oxygen and NH3. At room temperature, the response value of Ba0.996Nd0.004TiO3 to NH3 gas at 50 ppm is about 54 %, and the response time and recovery time are 11 s and 14 s, respectively. The results show that the excellent NH3 gas sensitive property is obtained for Ba1-xNdxTiO3 nanopowder. The adsorption energy, work function and charge density of Ba1-xNdxTiO3 toward NH3 is studied via density functional theory (DFT) based on first-principle. When doped with Nd ion at low concentration, BaTiO3 will be transformed into n-type semiconductor with the decreasing adsorption energy and increasing the electron transfer between NH3 and its surface, which result in the improved gas sensitivity to NH3 at room temperature. This study provides a new method for the preparation and the design of BaTiO3-based NH3 gas sensor. © 2025 Elsevier B.V.

关键词： Nanoparticles

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A novel pH-responsive berberine-loaded attapulgite microsphere for IBD therapy via the regulation of gut immunity and flora

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International Journal of Pharmaceutics 2025年 679卷 125705页

作者： Gong, Shiwen Ma, Wentao Hu, Die Wang, Xinyu Xu, Haixing Li, Binbin Department of Pharmaceutical Engineering School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan 528200 China Hainan Institute Wuhan University of Technology Sanya 572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan 430070 China

Inflammatory bowel disease (IBD) is an idiopathic, lifelong, and devastating chronic inflammatory disease of the gastrointestinal tract. Berberine, an alkaloid extracted from the Chinese herb Huanglian, is a pharmaceutical ingredient with antibacterial, anti-inflammatory, and antiviral pharmacological effects in Chinese medicine. However, direct administration of berberine requires high doses due to its low bioavailability and high waste in the stomach. In this study, we prepared berberine-loaded pH-responsive Eudragit® FS 30D-attapulgite (FS-ATT) microspheres for the targeted treatment of colitis. The microspheres had pH-responsive release behavior, with minimal berberine release (about 5.97%) in simulated gastric fluid and high berberine release in simulated colonic fluid (about 69.27%). In addition, it was revealed by in vivo biological evaluations that, compared with drugs in an equivalent solution form taken orally, a significant improvement in IBD symptoms was observed after oral administration of drug-loaded FS-ATT microspheres, leading to an increase in the diversity of intestinal microbiota, inhibition of inflammatory cytokines, and enhanced therapeutic effects of berberine. The pH-responsive FS-ATT microspheres could offer a promising drug delivery platform for managing and treating many gastrointestinal diseases. © 2025 Elsevier B.V.

关键词： Attapulgite Berberine Inflammatory bowel disease pH-responsive

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2D CoOOH Sheet-Encapsulated Ni2P into Tubular Arrays Realizing 1000 mA cm^-2-Level-Current-Density Hydrogen Evolution Over 100 h in Neutral Water

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Nano-Micro Letters 2020年第10期12卷 247-262页

作者： Shucong Zhang Wenbin Wang Feilong Hu Yan Mi Shuzhe Wang Youwen Liu Xiaomeng Ai Jiakun Fang Huiqiao Li Tianyou Zhai Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi University for NationalitiesNanning 530008GuangxiPeople’s Republic of China State Key Laboratory of Material Processing and Die and Mould Technology and School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiPeople’s Republic of China State Key Lab of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074HubeiPeople’s Republic of China

Water electrolysis at high current density(1000 mA cm-2 level)with excellent durability especially in neutral electrolyte is the pivotal issue for green hydrogen from experiment to *** addition to the high intrinsic activity determined by the electronic structure,electrocatalysts are also required to be capable of fast mass transfer(electrolyte recharge and bubble overflow)and high mechanical ***,the 2D CoOOH sheet-encapsulated Ni2P into tubular arrays electrocatalytic system was proposed and realized 1000 mA cm-2-levelcurrent-density hydrogen evolution over 100 h in neutral *** designed catalysts,2D stack structure as an adaptive material can buffer the shock of electrolyte convection,hydrogen bubble rupture,and evolution through the release of stress,which insure the long cycle ***,the rich porosity between stacked units contributed the good infiltration of electrolyte and slippage of hydrogen bubbles,guaranteeing electrolyte fast recharge and bubble evolution at the high-current *** that,the electron structure modulation induced by interfacial charge transfer is also beneficial to enhance the intrinsic ***,the multiscale coordinated regulation will provide a guide to design high-efficiency industrial electrocatalysts.

关键词： Large-scale hydrogen production Mass transport 2D adaptive material Interfacial charge modulation Multiscale coordinated regulation

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Effects on the thermal expansion coefficient and dielectric properties of CLST/PTFE filled with modified glass fiber as microwave material

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Chinese Chemical Letters 2019年第5期30卷 1111-1114页

作者： Liu Zheng Jing Zhou Jie Shen Yanyuan Qi Wen Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology

Ceramic and polytetrafluoroethylene composites as dielectric materials have a low dielectric loss at high frequency and play an important role in the modern communication ***,room temperature phase transformation of PTFE resins,which is accompanied by a large volume change(>400 ppm/℃),seriously affects the dimensional stability and performance stability of *** LD125 modified glass fiber(GF)was introduced to the CaO-Li2 O-Sm2O3-TiO2(CLST)/PTFE composite,to reduce the thermal expansion coefficient(CTE)of the *** tri-phase composites(CLST/PTFE/GF)show the low dielectric loss and excellent *** effect of GF content on the dielectric properties and CTE was also *** CLST/PTFE filled with 5%GF exhibits the best overall performance,which is a promising microwave dielectric material for microwave communication.

关键词： Microwave communication Thermal expansion coefficient CLST PTFE Dielectric loss Dielectric constant

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Bias Voltage Controlled Inversions of Tunneling Magnetoresistance in van der Waals Heterostructures Fe3GaTe2/hBN/Fe3GaTe2

arXiv

引用

arXiv 2025年

作者： Zhang, Lihao He, Miao Wang, Xiaoyu Zhang, Haodong Han, keying Liu, Yonglai Zhang, Lei Cheng, Yingchun Pan, Jie Qu, Zhe Wang, Zhe MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Materials and Mesoscopic Physics School of Physics Xi’an Jiaotong University Xi’an710049 China Anhui Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field Laboratory Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei230031 China Science Island Branch of Graduate School University of Science and Technology of China Hefei230026 China State Key Lab of Metastable Materials Science and Technology Yanshan University Qinhuangdao066004 China Key Laboratory for Microstructure Material Physics of Hebei Province Yanshan University Qinhuangdao066004 China

We report the bias voltage-controlled inversions of tunneling magnetoresistance (TMR) in magnetic tunnel junctions composed of Fe3GaTe2 electrodes and hBN tunneling barrier, observed at room temperature. The polarity reversal of TMR occurs consistently at around 0.625 V across multiple devices and temperatures, highlighting the robustness of the effect. To understand this behavior, we developed a theoretical model incorporating spin-resolved density of states (DOS) at high energy levels. By adjusting the DOS weighting at different k-points to account for misalignment between the crystal structure of electrodes in experimental devices, we improved agreement between experimental and theoretical inversion voltages. Our results provide valuable insight into the voltage-controlled spin injection and detection in two-dimensional magnetic tunnel junctions, with implications for the development of energy-efficient spintronic devices. © 2025, CC BY.

关键词： Van der Waals forces

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Enhancing Lithium Metal Battery Performance Through Reaction Center Shifting in Partially Fluorinated Electrolytes with Localized High Anion Concentration

SSRN

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SSRN 2023年

作者： Yang, Tong Zhang, Wenna Shen, Chunli Ren, Long Liao, Xiaobin Guo, Yaqing Zhao, Yan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Science and Technology Wuhan430070 China The Institute of Technological Sciences Wuhan University Wuhan Hubei430072 China College of Materials Science and Engineering Sichuan University Chengdu610065 China Wuhan University China College of Chemistry and Materials Engineering Wenzhou University Wenzhou325035 China State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

The design of a compatible electrolyte is crucial for achieving long-lifespan in lithium-metal batteries (LMBs). In this study, we report on a partially fluorinated electrolyte characterized by a weak solvation interaction of Li+ and a localized high anion concentration in the first solvation shell. This unique solvation structure shifts the reaction centers from solvent molecules to anions, enabling the predominant participation of anions in the formation of a LiF-rich solid-electrolyte interphase (SEI). Electrochemical experiments demonstrate efficient Li+ transfer kinetics, reduced Li nucleation overpotential polarization (28 mV), and extended cycling life in Li||Li cells using the partially fluorinated electrolyte. When tested in Li||NCM811 cells, the designed electrolyte delivers a capacity retention of 89.30% and exhibits a high average Coulombic efficiency of 99.80% over 100 cycles with a charge-potential cut-off of 4.6 V vs. Li/Li+ under the current density of 0.4 C. Furthermore, even at a current density of 1C, the cells maintain 81.90% capacity retention and a high average Coulombic efficiency of 99.40% after 180 cycles. This work underscores the significance of weak-solvation interaction in partially fluorinated electrolytes and highlights the crucial role of solvent structure in enabling the long-term stability and high-energy density of LMBs. © 2023, The Authors. All rights reserved.

关键词： Density functional theory

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A novel thermometric performance of Dy 3+ doped phosphor: fluorescence lifetime of grain boundary-doped MgAlON:Dy 3+ transparent ceramics

引用

Journal of Rare Earths 2025年

作者： Zhengyang Jing Bowen Chen Hao Wang Pan Gao Guangsheng Tu Bingtian Tu Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Longzhong Laboratory Xiangyang 441000 China

The energy transfer (ET) between f-f transition is achieved by rare earth ions (RE 3+ ) doped grain boundaries of transparent ceramics, which enhances the fluorescence thermometry performance and enables multiple fluorescence thermometry modes of transparent ceramics. In this work, MgAlON:Dy 3+ transparent ceramics were prepared and segregation of Dy 3+ in grain boundaries was realized. With excellent absolute and relative sensitivities (2.447 μs/K and 2.09%/K), the fluorescence lifetime (FL) signals of MgAlON:Dy 3+ exceeds most of RE 3+ doped phosphors. The ET between closely segregated Dy 3+ in grain boundaries modifies the distribution of electron on 4 I 15/2 level, and induces temperature-dependent FL to the phosphors. This work reveals the influence of grain boundary segregation on ET between Dy 3+ for improving the fluorescence thermometry performance of phosphors.

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Novel layered K0.7Mn0.7Ni0.3O2 cathode material with enlarged diffusion channels for high energy density sodium-ion batteries

引用

Science China materials 2020年第7期63卷 1163-1170页

作者： Jinghui Chen Zhitong Xiao Jiashen Meng Jinzhi Sheng Yanan Xu Junjun Wang Chunhua Han Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

As promising,low-cost alternatives of lithiumion batteries for large-scale electric energy storage,sodiumion batteries(SIBs)have been studied by many ***,the relatively large size of Na+leads to sluggish diffusion kinetics and poor cycling stability in most cathode materials,restricting their further *** this work,we demonstrated a novel K+-intercalated Mn/Ni-based layered oxide material(K0.7Mn0.7Ni0.3O2,denoted as KMNO)with stabilized and enlarged diffusion channels for high energy density SIBs.A spontaneous ion exchange behavior in forming K0.1Na0.7Mn0.7Ni0.3O2between the KMNO electrode and the sodium ion electrolyte was clearly revealed by in situ X-ray diffraction and ex situ inductively coupled plasma *** interlayer space varied from 6.90 to 5.76?,larger than that of Na0.7Mn0.7Ni0.3O2(5.63?).The enlarged ionic diffusion channels can effectively increase the ionic diffusion coefficient and simultaneously provide more K+storage sites in the product *** a proof-of-concept application,the SIBs with the as-prepared KMNO as a cathode display a high reversible discharge capacity(161.8 mA h g-1at0.1 A g-1),high energy density(459 W h kg-1)and superior rate capability of 71.1 mA h g-1at 5 A *** work demonstrates that the K+pre-intercalation strategy endows the layered metal oxides with excellent sodium storage performance,which provides new directions for the design of cathode materials for various batteries.

关键词： K0.7Mn0.7Ni0.3O2 K^+pre-intercalation enlarged layered structure high energy density sodium-ion batteries

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Enhanced Thermoelectric Properties of N-Type Cosb3-Based Composites by Incorporating in Particles

SSRN

引用

SSRN 2022年

作者： Xie, Wenhao Su, Xanli Zheng, Yun Zhu, Bo Cheng, Xin Wang, Ziyu Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education Jianghan University Wuhan430056 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China The Institute of Technological Sciences Wuhan University Wuhan430072 China

Thermoelectric devices that are made of n-and p-type materials in series has been well known and applied owing to the ability that convert waste heat into electric energy. Among them, environmentally friendly and cheap skutterudite materials have been studied as the main object. In this work, n-type CoSb3 based materials were synthesized via non-filling method. The thermoelectric properties were systematically measured via various method and microstructure and morphology was characterized. Finally, the PF maximum value is 3642.3 μW/mK2 at 723 K for Co0.91Ni0.09Sb3/1wt% In sample and the highest ZT value of 1.01 was attained for the Co0.91Ni0.09Sb3/2wt%In thermoelectric ingot. These results indicate that non-filling method could improve the thermoelectric performance of n-type CoSb3 based materials. © 2022, The Authors. All rights reserved.

关键词： Waste heat

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Differentiation of Chemisorption and Physisorption of Carbon Dioxide on Imidazolium-type Poly(ionic liquid)Brushes

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Journal of Wuhan University of technology(materials Science) 2020年第4期35卷 750-757页

作者： ZHANG Dongyu QU Rong ZHANG Haining ZHANG Fangfang Technology Center China Tobacco Henan Industrial Co.Ltd.Zhengzhou 450000China Non-power Nuclear Technology Collaborative Innovation Center Hubei University of Science and TechnologyXianning 437100China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Amine-functionalized imidazolium-based poly(ionic liquid)brushes on mesoporous silica were synthesized via"grafting through"technique and were applied as model sorbents to understand physisorption and chemisorption of carbon dioxide *** experimental results reveal that the total adsorption capacity of model sorbents derived from temperature programmed desorption(TPD)approach reaches 1.72 mmol·g^-1 that is much higher than the sum of adsorption capacity of bare mesoporous silica and free polymers at 25℃under carbon dioxide partial pressure of 0.2 *** proposed physical adsorption and chemical adsorption of carbon dioxide molecules in TPD response curves were validated by volumetric desorption *** is also observed that physical adsorption is completely reversible and chemical adsorption is *** results demonstrate that the temperature programmed desorption technique is an effective approach to differentiate chemisorption and physisorption of gaseous species on solid sorbents,which is beneficial for understanding of adsorption mechanism and materials design.

关键词： adsorption surface-attachment poly(ionic liquid) grafting through carbon dioxide

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