SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 8.3
Yingjie Li,Na Zhao,Yilin Chen,Jun Zhang,Xianghong Liu
For metal oxide semiconductor (MOS) gas sensors, achieving rapid and highly sensitive responses at room temperature (RT) remains a significant challenge. In this study, Ni-doped SnO 2 nanoparticles (NPs) were synthesized via a sol-gel method. The incorporation of nickel ions substantially enhanced the RT NO 2 sensing performance of SnO 2 . At an optimal doping concentration (5 at%), the SnO 2 NPs exhibited high sensitivity, excellent selectivity, and good stability, with a nearly 120-fold enhancement in sensor response. The excellent sensor performance can be attributed to the fact that when Ni 2 + enters the SnO 2 lattice and replaces Sn 4+ , it disrupts the defect balance in the SnO 2 lattice. The presence of Ni 2+ in the SnO 2 crystal captures free electrons in the sensitive material, forming oxygen ions and oxygen vacancies, which alters the defect balance of the gas-sensitive element and promotes the adsorption of NO 2 on the SnO 2 surface. This doping strategy effectively lowered the operating temperature of SnO 2 , enabling reliable NO 2 detection under RT conditions. Additionally, the experimental detection limit of the sensor reached as low as 100 ppb, far below the threshold of 200 ppb recommended by the American Conference of Governmental Industrial Hygienists (ACGIH). This work provides an effective sensitization strategy for developing RT gas sensors.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Zhiqiang Zheng,Tian Qiu,Zhanghua Fu,Chuang Chen,Huancai Li,Cheng Hu
Graphical The heteroepitaxial Li deposition occurs on single-crystalline Ni(110) substrates, exhibiting the same {110}<001> texture with the substrate and a planar morphology. Using the {110}-textured epitaxial layer as the Li anode, the Li||LiPeO 4 full cell presents improved cycle life, compared with the {111}-textured Li anode and untextured Li anode. Lithium (Li) metal is recognized as a highly promising anode material for next-generation high-energy-density batteries. Nonetheless, dendrite growth and low coulombic efficiency (CE) significantly impede the practical application of Li metal anodes. The deposition morphology and chemical stability of Li are intricately linked to its crystallographic orientation. This study presents a substrate engineering approach that employs single-crystalline nickel (Ni) to facilitate epitaxial Li deposition due to their excellent lattice matching. The findings reveal that the Ni(110) substrate exhibits a more pronounced heteroepitaxial effect than Ni(111). A robust {110}-textured Li deposition was prepared on Ni(110) with a uniform planar morphology due to the lower Li self-diffusion barrier on the Li(110) plane. The {110}-textured Li epitaxial deposition improves the cycling stability in Ni-Li cells and full cells. Notably, the Li||LiFePO 4 full cell utilizing the {110}-textured Li anode exhibits a high capacity retention of 109.6 mAh cm −2 over 350 cycles at 1 C under a low negative-to-positive capacity ratio of 1.26. This investigation highlights the crucial role of substrate-induced heteroepitaxy in improving Li plating/stripping dynamics and provides insights for the development of stable Li metal anodes by crystallographic orientation modification.
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LANGMUIR
·
2025
·
IF 3.9
Wen-Long Ren,Yi-kai Wang,Mingxing Zhang,Chengchen Zhang,Qian Huang,Yuyang Zeng,Zhi-Wen Lin,Kaige Guo,Dehao Xiong,Chen-Guang Zhu
The development of efficient catalysts to regulate the thermal decomposition and combustion behavior of ammonium perchlorate (AP) is essential for improving the energy output of solid propellants. In this study, a LaFe0.5Co0.5O3/Ni–Fe Prussian Blue Analogue (PBA) composite was designed to synergistically enhance the decomposition kinetics and combustion performance of AP. The composite integrates perovskite-type oxides with a conductive PBA framework, forming a bifunctional electronic–geometric catalytic interface. Systematic characterization revealed that the optimized Ni–Fe PBA effectively balanced oxygen vacancy generation, Fe2+/Fe3+ redox cycling, and a multistage pore structure. This led to a 106.9 °C reduction in AP’s thermal decomposition temperature and a 56.2% decrease in activation energy. Combustion tests demonstrated a 48.1% increase in burning rate, a 35.0% increase in flame area, and a 45.8% increase in luminescence intensity, which may be attributed to improved charge transfer and gas diffusion facilitated by interfacial synergy between the two components. This work offers a strategy for designing high-performance catalysts via interfacial engineering, with promising potential for broad applications in fuel energy modulation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Sain Bux Jamali,Tauqeer Haidar Qamar,Sibt ul Hassan,Nouman Ahmed,Ijaz Ahmad,Pengkun Xia,Shakeel Ahmad,Shengxiang Huang,Lianwen Deng
The escalating demand for effective electromagnetic interference shielding, particularly in the challenging low-frequency microwave range such as S-band, underscores the need for advanced high-performance electromagnetic absorbing materials. Herein, three-dimensional (3D) nickel/nitrogen-doped porous carbon foam decorated with carbon spheres (3D Ni/NPCF@CS) was synthesized for S-band microwave absorption. This unique design capitalizes on the synergistic interplay between the highly conductive and porous 3D carbon skeleton, the magnetic properties of encapsulated Ni nanoparticles, and the enhanced interfacial polarization provided by the conductive polypyrrole coating. This engineered hierarchical architecture created abundant heterogeneous interfaces and microwave loss pathways. Detailed electromagnetic analysis revealed that the optimized Ni/NPCF@CS composite material exhibited exceptional reflection loss (RL) performance of −57.8 dB at 3.44 GHz. The dominant absorption mechanisms, including dielectric loss from dipole polarization, conductive loss, and magnetic loss from Ni nanoparticles, were thoroughly investigated and discussed. This study provides valuable insights into the development of 3D-foam-based microwave-absorbing materials, particularly for their practical implementation in the S-band.
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COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Guodong Han,Fangyuan Qi,Song Zhao,Yuxiang Jia,Junxiang Zhou,Yudeng Wang,Sai Sui,Bo Feng,Jun Wang,Jiafu Wang,Shaobo Qu
The microstructure design of new carbon nanomaterials always achieves unimaginable characteristics and performance. In this work, the influence of surface roughness ( Ra ) of porous carbon derived from Metal-Organic-Frameworks (MOFs) with different shapes on impedance matching and effective absorption bandwidth (EAB) has been given special attention. The rod shaped, spherical and sheet-like porous carbon materials are obtained at 700 °C from Ni-BTC, Ni-DOBDC and Ni-BPDC. The Ni-DOBDC-700 spherical porous carbon with a relatively large Ra (290 nm) exhibits excellent absorption performance. The minmium reflection loss ( RL min ) is -20.8 dB at 14 GHz and the EAB can reach at 6.7 GHz (11.1-17.8 GHz) when the thickness is 2.2 mm, which covers the Ku band. The spherical porous carbon, the Ni alloys and NiO particles serves the conduction channel, the sources of magnetic loss and interface polarization, respectively. The radar cross section (RCS) value of Ni-DOBDC-700 is less than -10 dB m 2 within the range of -60° to 60° and the maximum scattering intensity is only -16.5 dB m 2 at the thickness of 2 mm. The results provide a new design strategy for fabricating high performance MAMs with different morophology of MOFs derived carbon materials.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Linghong Xue,Jiale Dang,Xu Li,Fangmeng Liu,Ziyu Qin,Qingji Wang
Cardiovascular disease, as the world's highest mortality disease category, is prone to acute myocardial infarction and stroke, posing a serious threat to human health. In recent years, breath analysis technology, with its significant advantages of being non-invasive, easy to operate, cost-effective, and portable, has emerged as a research hotspot and frontier in the field of early warning and diagnosis of cardiovascular diseases by detecting the concentration of CO, a hallmark gas of cardiovascular diseases. Among various detection methods, metal oxide semiconductor (MOS) sensors have demonstrated significant development potential in breath analysis applications due to their comprehensive advantages, including high sensitivity, rapid response characteristics, excellent environmental adaptability, and cost-effectiveness, gradually establishing themselves as the most promising technical solution in this field. In this study, we successfully developed a high-performance CO sensor based on nickel-doped zinc oxide (Ni-ZnO) nanosheets using the aerosol-assisted chemical vapor deposition (AACVD) technique. By optimizing the nickel doping ratio and the nanosheet structure, the sensor achieved a detection limit as low as 5 ppb for CO, while its response to 100 ppm of CO was more than 20 times higher than 100 ppm of other gases, demonstrating excellent selectivity. Therefore, CO sensors based on Ni-doped ZnO provide important technical support for the prevention and early diagnosis of cardiovascular diseases.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·Vol. 46
·期 66
·33186-33196
·
IF 5.816
Xinjun Li,Yaokun Fu,Yichao Xie,Lian Cong,Han Yu,Lu Zhang,Yuan Li,Shumin Han
Additive doping is one of the effective methods to overcome the shortcomings of MgH 2 on the aspect of relatively high operating temperatures and slow desorption kinetics. In this paper, hollow g-C 3 N 4 (TCN) tubes with a diameter of 2 μm are synthesized through the hydrothermal and high-temperature pyrolysis methods, and then nickel is chemically reduced onto TCN to form Ni/TCN composite at 278 K. Ni/TCN is then introduced into the MgH 2 /Mg system by means of hydriding combustion and ball milling. The MgH 2 –Ni/TCN composite starts to release hydrogen at 535 K, which is 116 K lower than the as-milled MgH 2 (651 K). The MgH 2 –Ni/TCN composite absorbs 5.24 wt% H 2 within 3500 s at 423 K, and takes up 3.56 wt% H 2 within 3500 s, even at a temperature as low as 373 K. The apparent activation energy ( E a ) of the MgH 2 decreases from 161.1 to 82.6 kJ/mol by the addition of Ni/TCN. Moreover, the MgH 2 –Ni/TCN sample shows excellent cycle stability, with a dehydrogenation capacity retention rate of 98.0% after 10 cycles. The carbon material enhances sorption kinetics by dispersing and stabilizating MgH 2 . Otherwise, the phase transformation between Mg 2 NiH 4 and Mg 2 NiH 0.3 accelerates the re/dehydrogenation reaction of the composite.
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Qiongyu Wang,Ziheng Zhang,Xilun Zhang,Hua Xie,Ling Jiang,Fei Chang
Catalytic alkyne semi-hydrogenation is a pivotal industrial transformation currently constrained by the limitations of existing heterogeneous catalysts: precious metals (e.g., Pd) face high costs, while non-precious alternatives (e.g., Ni, Cu, Fe) generally require harsh reaction conditions (100–200 °C, 10–40 bar H 2 ). To address these persistent challenges, we propose a novel strategy integrating alkali metal hydrides, serving simultaneously as hydrogen donors and anionic “ligands” into transition metal systems. Herein, we report a NiFe-LiH composite catalyst that enables efficient and highly selective liquid-phase semi-hydrogenation of alkynes—including aliphatic, aromatic, and heteroatom-substituted substrates under very mild conditions (25 °C, ≤3 bar H 2 ). Mechanistic investigations reveal that reactive hydride species (H − ) are integral to the hydrogenation catalysis. Critically, the formation of unique Li-Ni-Fe-H interfacial species facilitate synergistic interactions wherein anionic hydrides coordinate with transition metals, modulating their electronic states to simultaneously enhance catalytic activity and selectivity. This work demonstrates room-temperature activation and transformation of alkynes enabled by a catalytic Li-Ni-Fe-H system, offering a promising new pathway for developing efficient non-noble metal catalysts for selective hydrogenation reactions.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Ran Wei,Xu Zhao,Liping Li,Guangshe Li
A series of Ni and Co codoped manganese dioxide catalysts with varying Ni/Co ratios were prepared via a two-step hydrothermal-assisted calcination process, in which Birnessite-type δ-MnO2 precursors were first synthesized hydrothermally and then calcined at different temperatures. The optimally performing Ca-NCMO11–500 (Ni/Co = 1:1, calcined at 500 °C) was identified. Systematic investigations revealed that bimetallic doping modulates the local structure and electronic states of the manganese oxide framework. The Ca-NCMO11–500 catalyst exploits Ni–Co synergistic effects to activate lattice oxygen and promote O–O coupling, resulting in superior oxygen evolution reaction activity. Electrochemical measurements demonstrate that Ca-NCMO11–500 achieves 50 mA cm–2 at an overpotential of 237 mV and maintains excellent durability with negligible activity loss over 300 h at 400 mA cm–2. This study elucidates the microscopic mechanism by which Ni and Co codoping strengthens metal–oxygen bonds and enhances lattice oxygen reactivity, providing a rational basis for the design of high-performance manganese-based electrocatalysts.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 15
·8248-8255
·
IF 11.9
Liang Shen,Wenhao Zhang,Yifei Feng,Jing Xu,Minghui Zhu
Hydrogenation of CO2 to produce high-value chemicals is a response to increasing environmental and energy concerns. The target products of CO2 hydrogenation, methane and CO, are both important energy sources and raw materials for the production of higher hydrocarbons. Therefore, it is very important to understand the mechanism of selectivity control of catalysts. In this work, we aim to elucidate the selectivity regulation of Zn on Ni catalysts, which has been extensively studied in the literature without reaching a consensus. We have prepared a series of catalysts with different Zn content and systematically investigated the relationship between their structural evolution and selectivity. It is found that the introduction of Zn preferentially forms an alloy with Ni and at higher loadings is present as ZnOx, which participates in the strong metal–support interaction (SMSI). The conversion of the active sites into a Ni–Zn alloy hinders further hydrogenation of the adsorbed CO intermediates and makes the catalyst CO-selective. The presence of the Ni–ZnOx interface changes the CO2 activation mechanism from an association pathway to a redox pathway.
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Coatings
·
2023
·Vol. 13
·期 4
·695
·
IF 3.4
Gen Li,Zhixiang Chen,Zhiwen Tan,Ran Tian,Yuantao Zhao,Lianbo Wang,Wenge Li,Yanbo Liu
The current work synthesized Ni-SiC composite coating with different SiC microparticle contents. The role of the SiC microparticle in designing the Ni-SiC composite microstructure was revealed. The SiC microparticle physically interrupted the continuous growth of the underlying columnar Ni grains. The columnar Ni grain between the embedded SiC microparticle grew without disturbance. Only upon SiC microparticles was a new layer starting with refined Ni grains observable. The vertical columnar Ni grains reappeared as the position departed the SiC microparticle upper surface. The increase in the contents of the SiC microparticle led to an increased level of grain refinement and the elimination of the (200) fiber texture. Besides that, the number of V-shaped valleys increased as well. Corrosion testing results show that the corrosion resistance of Ni-SiC composite coating increased with the increased SiC contents, which was mainly due to the optimized microstructure.Keywords:Ni matrix composite;SiC microparticles;deposits growth behavior;grain refinement;corrosion resistance
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MOLECULES
·
2023
·Vol. 28
·期 11
·4411
·
IF 4.6
Fuhua Wei,Kui Wang,Wenxiu Li,Qinhui Ren,Lan Qin,Mengjie Yu,Zhao Liang,Meng Nie,Siyuan Wang
This work studies the use of Fe/Ni-MOFs for the removal of ciprofloxacin (CIP) in wastewater. Fe/Ni-MOFs are prepared by the solvothermal method and characterized by X-ray diffraction (XRD), a scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), and a thermal gravimetric analyzer (TG). Under the conditions of the concentration of 50 ppm, a mass of 30 mg, and a temperature of 30 °C, the maximum adsorption capacity of ciprofloxacin removal within 5 h was 232.1 mg/g. The maximum removal rate was 94.8% when 40 mg of the Fe/Ni-MOFs was added to the solution of 10 ppm ciprofloxacin. According to the pseudo-second-order (PSO) kinetic model, the R2values were all greater than 0.99, which proved that the adsorption theory of ciprofloxacin by Fe/Ni-MOFs was consistent with the practice. The adsorption results were mainly affected by solution pH and static electricity, as well as other factors. The Freundlich isotherm model characterized the adsorption of ciprofloxacin by Fe/Ni-MOFs as multilayer adsorption. The above results indicated that Fe/Ni-MOFs were effective in the practical application of ciprofloxacin removal.Keywords:metal–organic frameworks;antibiotics;adsorption
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