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Improved ammonia sensing performance of Nd-modified nano-BaTiO 3 at room temperature

Journal of Alloys and Compounds 2025年 1033卷

作者： Ruize Hu Hua Hao Jingsai Cheng Feiyang Feng Qinghu Guo Zhonghua Yao Hanxing Liu 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 Wuhan 430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan 528200 China

In this study, BaTiO 3 doped with Nd ions (Ba 1- x Nd x TiO 3 , x  = 0 ∼ 0.02) nanoparticles were prepared by hydrothermal method, and their gas sensitivity to NH 3 at room temperature was investigated. Compared with BaTiO 3 , the particle size of Nd doped BaTiO 3 powder decreases and the specific surface area increases. At the same time, the gas-sensitive performance on NH 3 is enhanced, which is mostly due to that the increased concentration of oxygen vacancy and adsorbed oxygen promote the reaction between adsorbed oxygen and NH 3 . At room temperature, the response value of Ba 0.996 Nd 0.004 TiO 3 to NH 3 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 NH 3 gas sensitive property is obtained for Ba 1 -x Nd x TiO 3 nanopowder. The adsorption energy, work function and charge density of Ba 1- x Nd x TiO 3 toward NH 3 is studied via density functional theory (DFT) based on first-principle. When doped with Nd ion at low concentration, BaTiO 3 will be transformed into n-type semiconductor with the decreasing adsorption energy and increasing the electron transfer between NH 3 and its surface, which result in the improved gas sensitivity to NH 3 at room temperature. This study provides a new method for the preparation and the design of BaTiO 3 -based NH 3 gas sensor.

关键词： Nanoparticles

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Sprayed and Mechanical-Modified Graphite Layer as Transferred Electrode for High-Efficiency Perovskite Solar Cells

SSRN

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SSRN 2022年

作者： Chen, Lin Duan, Qiuyue Dong, Wei Zhu, Aodong Zhang, Ao Zhang, Xinxin Zhong, Jie Huang, Fuzhi Cheng, Yi-Bing Xiao, Junyan School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology 1037 Luoyu Road Hubei Wuhan China Research Centre for Advanced Thin Film Photovoltaics Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China

As an alternative of evaporated metal top electrode in perovskite solar cells, the transferred top electrode technique has the outstanding advantage of simple process. And in the case of carbon based transferred top electrode, the efficiency of corresponding perovskite devices can be higher than 20%. During the solid-to-solid electrode transferring process, it is essential to achieve effective contact and to avoid damage of bottom functional layers for an improved device performance. In this work, a sprayed graphite layer on conductive substrate is employed as transferred top electrode for perovskite solar cells. A simple mechanical polishing treatment is further adopted to modify the surface status of graphite layer. Compared with as sprayed graphite electrode, polished electrode shows better electrical property and optimized interface contact with hole-transporting layer. Thus, the average efficiency of perovskite device with mechanical modified electrode can significantly increase from 16.3% to 19.2%. © 2022, The Authors. All rights reserved.

关键词： Perovskite

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One-Step Anti-Solvent Associated Method for High Performance Two-Dimensional Perovskite Photodetectors Fabrication at Low Temperature

SSRN

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SSRN 2022年

作者： Yue, Yunfan Li, Ming-Yu Li, Hao Chai, Nianyao Dong, Yifan Li, Zeping Chen, Xiangyu Wang, Xuewen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory The Advanced Energy Science and Technology Guangdong Laboratory Foshan528216 China School of Science Wuhan University of Technology Hubei Wuhan430070 China Engineering Research Center of Nano-Geomaterials Ministry of Education Faculty of Material Science and Chemistry China University of Geosciences Wuhan430074 China

The two-dimensional (2D) organic-inorganic perovskite of unique optical properties and improved stability holds great potential in high-performance perovskite optoelectronic applications. However, a huge challenge to manufacture continuous thin films at large scale and low cost is still unresolved. Here, a facile method to fabricate high quality (PEA) 2 PbI 4 thin films at low temperature in the air condition by one-step anti-solvent associated method was firstly proposed. The mechanism of nucleation sites formation and grain growth rates governed by the polarity and saturated vapor pressure of anti-solvents and annealing temperature was disclosed. By comparing different anti-solvents at various annealing temperatures, high quality thin films with the lowest annealing temperature of 80 °C were achieved by using toluene. A simple planar photodetector was configured, with the Responsivity (R s ) and Detectivity (D*) of 752 μA/W and 2.76×10 8 Jones with active area of 150 μm × 8000 μm, respectively, and the stability keeping 92% after 90 cycles under continuous light illumination in the air. This method offers a simple and low cost approach for manufacturing high quality 2D perovskite films and high-performance photodetectors at low temperature for industrial applications. © 2022, The Authors. All rights reserved.

关键词： Perovskite

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Effects of depth of discharge on the electrochemical performance of LiFePO4-graphite pouch cells

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Solid State Ionics 2025年 427卷

作者： Qiao, Xin Mu, Yahao Peng, Jian Pei, Bo Wang, Shuo Wuhan Institute of Marine Electric Propulsion Wuhan430064 China Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China

Lithium iron phosphate-graphite (LFP-C) batteries are widely used in energy storage and electric vehicles due to their high safety and good cycling stability. However, there is still a lack of in-depth research to investigate the impact of depth of discharge (DOD) on LFP-C pouch cells. In this work, we systematically investigate the influence of DOD (2.5 V and 1.5 V) on the cycling performance of LFP-C pouch cells, and the evolution of the cathode–electrolyte interphase (CEI) and solid electrolyte interphase (SEI) layers. In comparison to a DOD of 2.5 V, the cell with a DOD of 1.5 V exhibits a rapid capacity degradation after 50 cycles. Combined with comprehensive characterizations, the mechanism of battery decay has been revealed. A deeper discharge to 1.5 V results in an increase in the disorder of graphite. Additionally, the organic components in the SEI layer decreases, while the Li2CO3, LiF, and Li3PO4 inorganic products enrich due to the continued decomposition of electrolyte. Meanwhile, the pouch cells generate a considerable quantity of H2 and minor CH4 gases. This study will pave the way to understand the effects of overdischarge on the electrochemical performance of commercial pouch cells and the evolution mechanism of CEI/SEI layers. © 2025 Elsevier B.V.

关键词： Battery Pack

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Scalable polydopamine@ZrO2/PVDF composite ink for corrosion protection of magnesium alloy

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Colloids and Surfaces A: Physicochemical and Engineering Aspects 2025年 721卷

作者： Li, Zhenyang Yang, Kai Zhang, Pengxiang Wang, Yunfan Peng, Jian Li, Bao-Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices and Center of Biomedical Material and Engineering Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Two-dimensional (2D) materials have exhibited significant potential in the field of metal anticorrosion coatings. However, nanosheets with high electrical conductivity may promote "corrosion-enhancing activity," thereby compromising the protective efficacy of the coating. In contrast, metal oxide nanosheets derived from layered compounds present a promising alternative due to their favorable properties. In this study, a composite ink for AZ31 magnesium alloy anticorrosion with blade coating method is fabricated by polydopamine (PDA)-coated ZrO2 nanosheets/polyvinylidene fluoride (PVDF). The surface composition and microstructure of the resulting coating are systematically characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The anticorrosion properties of the composite coating are evaluated through potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The electrochemical results demonstrate that the ZrO2@PDA/PVDF coating achieves a corrosion protection efficiency of 99.93 %, with a corrosion current density of 9.48 × 10−8 A·cm−2, which is three orders of magnitude lower than that of bare AZ31. This study provides a new insight into the scalable application of metal oxide nanosheets in metal anticorrosion coatings. © 2025 Elsevier B.V.

关键词： Fourier transform infrared spectroscopy

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Strongly enhancing the energy storage properties and stability of amorphous BaTiO3 thin films via ions doping

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Scripta materialia 2025年 265卷

作者： Chang, Ruiling Yao, Zhonghua Xing, Yutong Wang, Jun Hao, Hua Cao, Minghe Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572000 China

Amorphous thin films with high power density and breakdown strength satisfy the needs of advanced power electronic systems. Nonetheless, improving the energy storage density of amorphous films is critical for addressing the growing demand for electricity. We apply high spontaneous polarization BaTiO3 as the main component to make (1-x)Ba(Ti0.99Mn0.02)O3-xBiFeO3((1-x)BTM-xBF) thin films. Doping BiFeO3 (BF) synergistically boosts polarization. The introduction of amorphous phases and Mn ions enhances the breakdown strength. The results demonstrate that, at x = 0.10, the film can achieve both a high efficiency of 80.3 % and an excellent energy storage density of 111.3 J cm-3. Moreover, the film has a strong thermal stability within a broad range of 20 to 160 °C, as well as the cycling reliability is as high as 105 times. The present study offers a practical approach to develop film capacitors with outstanding energy storage capabilities. © 2025 Acta materialia Inc.

关键词： Amorphous films

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The Impact Failure and Energy Dissipation Mechanism of Polyethylene Laminates

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Journal of Wuhan University of technology(materials Science) 2019年第3期34卷 723-727页

作者： SHU Zaiqin ZHANG Jinyong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Institute of Material Science and EngineeringWuhan University of TechnologyWuhan430070China System Design Institute of Hubei Aerospace Technology Academy Wuhan430040China

The damage mechanism and energy dissipation of the Polyethylene (PE) laminates in impacting was investigated. It was found that the dissipated energy of the impacting sphere bullet by the 1-mmthick PE plate firstly increased with the impacting velocity increasing from 50 to about 300 m/s, and then decreased with the impacting velocity increasing up to 600 m/s. According to the measured deformation and damage degree, a numerical simulation of the dissipated energy was made and obvious offset was found with the experimental results. The quasi-static properties of the PE fibers, decreasing with increase in tensile velocity, may be the main reason for the offset.

关键词： polyethylene ballistic impact energy dissipation strain rate

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PTCDA/CuS cathode enabling stable sulfide-based all-solid-state batteries

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Journal of Materiomics 2025年

作者： Zhixing Wan Shuo Wang Yahao Mu Ruihua Zhou Hang Liu Tingwu Jin Di Wu Jianlong Xia Ce-Wen Nan Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

Organic cathode materials have garnered significant attention for their potential application in lithium-ion batteries due to their lightweight nature, tunable structures, high energy density, and environmental friendliness. However, the dissolution of organic cathodes in liquid electrolytes often leads to poor cycling stability, which limits their practical application. In this study, a composite cathode was prepared by ball milling the PTCDA/CuS (perylene-3,4,9,10-tetracarboxylic dianhydride, PTCDA) with a sulfide-based electrolyte and carbon nanotubes. By optimizing the component ratios, the assembled all-solid-state batteries (ASSBs) show a high discharge capacity of 210 mA⸱h/g after 200 cycles without any capacity degradation at a current density of 33.0 mA/g. Through comprehensive characterization techniques including X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), the coordination of Cu 2+ and the formation of sulfur-linked polymers during the charge-discharge processes are elucidated, and the reversibility of the electrochemical reactions has been confirmed. This work highlights the excellent compatibility between organic cathodes and sulfide-based electrolytes, providing a new way for the development of high-performance ASSBs with high energy density and extended lifespan.

关键词： PTCDA/CuS lithium argyrodite organic cathode all-solid-state battery

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Triethanolamine-mediated photodeposition formation of amorphous Ni-P alloy for improved H2-evolution activity of g-C3N4

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Science China materials 2020年第11期63卷 2215-2227页

作者： Huogen Yu Jiachao Xu Duoduo Gao Jiajie Fan Jiaguo Yu Department of Chemistry School of ChemistryChemical Engineering and Life SciencesWuhan University of TechnologyWuhan 430070China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Developing efficient,stable,and low-cost novel electron-cocatalysts is crucial for photocatalytic hydrogen evolution ***,amorphous Ni-P alloy particles were successfully modified onto g-C3N4 to construct the Ni-P/g-C3N4 photocatalyst through a simple and green triethanolamine(TEOA)-mediated photodeposition *** was found that the TEOA could serve as an excellent complexing agent to coordinate with Ni2+to form[Ni(TEOA)]^2+complex,which can promote the rapid and effective deposition of amorphous Ni-P alloy on the g-C3N4 *** tests suggest that the hydrogen-evolution performance of gC3N4 can be greatly promoted through integrating amorphous Ni-P ***,the Ni-P/g-C3N4(5 wt%)exhibits the superior H2-generation activity(118.2μmol h^-1g^-1),which is almost 35.8 times that of bare ***,the amorphous Ni-P alloy cocatalyst can also serve as the general hydrogen-production cocatalyst to greatly enhance the photocatalytic performance of traditional semiconductor materials such as Ti O2 and Cd *** on the present results,the mechanism of the amorphous Ni-P alloy as the high-efficiency electron transfer medium was proposed for the boosted H2-generation *** present facile route may broaden the horizons for the efficient development of highly active cocatalysts in photocatalytic field.

关键词： photocatalysis H2evolution g-C3N4 amorphous NiP alloy photodeposition

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Fe-N-C Single-Atom Nanozyme for Ultrasensitive, On-Site and Multiplex Detection of Mycotoxins Using Lateral Flow Immunoassay

SSRN

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SSRN 2022年

作者： Cai, Xinfa Ma, Fei Jiang, Jun Yang, Xianglong Zhang, Zhaowei Jian, Zelang Liang, Meijuan Li, Peiwu Yu, Li Oil Crops Research Institute Chinese Academy of Agricultural Sciences Wuhan430062 China Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural Affairs Wuhan430062 China Key Laboratory of Detection for Mycotoxins Ministry of Agriculture and Rural Affairs Wuhan430062 China Ministry of Agriculture and Rural Affairs Wuhan430062 China Quality Inspection and Test Center for Oilseeds Products Ministry of Agriculture and Rural Affairs Wuhan430062 China Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan430070 China

Sensitive, on-site and multiple detection of mycotoxins is a vital early-warning tool to minimize food losses and protect human health and the environment. Although paper-based lateral flow immunoassay (LFIA) have been extensively applied in mycotoxins monitoring, low-cost, portable, ultrasensitive and quantitative detection is still a formidable challenge. Herein, a series of Fe-N-C single-atom nanozymes (SAzymes) were synthesized and systematic characterized. The optimal Fe-N-C SAzyme with highly efficient catalytic performance was successfully used as both label and catalyst in lateral flow immunoassays for mycotoxin detection. By taking advantage of the catalytic amplified system, the qualitative and quantitative detection can be easily and flexibly done via observing the test lines by naked eyes or a smartphone, with the LODs of 2.8 and 13.9 pg mL -1 for AFB 1 and FB 1 , which were respectively over 700- and 71000-fold lower than the maximum limit set by the European Union. Besides, underlying catalytic mechanisms and the active sites of the Fe-N-C SAzyme are also investigated by DFT simulation. This work not only provided a promising detection strategy for the application of advanced SAzymes but also offers experimental and theoretical guidelines to understand the active centers of Fe-N-C SAzymes and the catalytic process. © 2022, The Authors. All rights reserved.

关键词： Mycotoxins

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