SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Yiran Zhang,Bang Xiao,Lin Yang,Anqi Jiao,Ke Li,Chunping Wu,Reggie Zhan,Zhen Huang,He Lin
YSZ-based mixed-potential sensors with double-sensing electrodes were fabricated for ammonia (NH 3 ) detection. ZnO and LaCoO 3 nanoparticles prepared by flame spray pyrolysis (FSP) method were used as the sensing materials. The sensing responses of ZnO and LaCoO 3 sensing electrodes can be overlapped based on the double-sensing-electrode structure, thereby significantly enhancing the sensitivity compared with the traditional mixed-potential sensors using Pt reference electrode. The sensitivities of this sensor reached up to -102.85, -75.312, -70.165, -48.616 mV/decade to 10–50 ppm NH 3 at 450, 475, 500, 525 ℃ , respectively. Moreover, the NO 2 interference effects on NH 3 detection of ZnO and LaCoO 3 electrodes were opposite and can be counteracted based on the double-sensing-electrode structure, eliminating most of the cross-sensitivity to NO 2 . The double-sensing-electrode sensor exhibited good performance under CO, CH 4 , NO, NO 2 interference, oxygen fluctuation, and humidity variations, and showed good long-term stability. The results of sensing performance exhibited the sensors with double-sensing electrodes have a great potential for application on SCR system of diesel engines. In further studies, each sensing electrode can be optimized respectively and the sensitivity and selectivity of NH 3 sensors could be enhanced to a higher level.
研究领域:
传感器学
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材料科学
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环境监测
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能源工程
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气体传感
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纳米材料
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催化化学
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DOI
高影响因子
Journal of Materiomics
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2024
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IF 8.4
Xin Zhou,Chenbin Ai,Xiaojing Wang,Zhen Wu,Jianjun Zhang
Pure ZnO exhibits low photocatalytic H 2 O 2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F – (ZnO/F) by introducing NH 4 F in an aqueous phase photocatalytic system. The F – is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H 2 O 2 production performance of ZnO, with the highest efficiency of 4137.2 μmol·g –1 ·L –1 ·h –-1 . The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F – surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F – , and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F – surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H 2 O 2 reaction. This study has revealed the roles of F – surface modification in the photocatalytic H 2 O 2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Yanzhe Zhang,Xiangmei Liu,Zhaoyang Li,Shengli Zhu,Xubo Yuan,Zhenduo Cui,Xianjin Yang,Paul K. Chu,Shuilin Wu
Interfacial characteristics play an important role in infection prevention and osteointegration of artificial bone implants. In this work, both Ag nanoparticles (AgNPs) and ZnO NPs are incorporated into hydroxyapatite (HA) nanopowders and deposited onto Ti6Al4V (Ti6) implants by laser cladding. The composite coatings possess a hierarchical surface structure with homogeneous distributions of Ag and ZnO. The Ag and ZnO NPs that are immobilized by laser cladding ensure long-term and gradual release of Ag and Zn ions at low cumulative concentrations of 36.2 and 56.4 μg/L after immersion for 21 days. A large concentration of Ag released initially increases the cytotoxicity but the large initial ZnO content enhances the cell viability and osteogenetic ability. The nano Ag/ZnO-embedded HA coating (Ag/ZnO/HA = 7:3:90 wt %, namely Ag7ZnO3HA) exhibits optimal antibacterial efficacy and osteogenetic capability, as exemplified by the broad spectrum antibacterial efficacy of 96.5 and 85.8% against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively, together with enhanced osteoinductivity with higher alkaline phosphatase (ALP) activity of 134.60 U/g protein compared to 70.79 U/g protein for the untreated implants after culturing for 7 days. The rabbit femoral implant model further confirms that the optimized composite coating accelerates the formation of new bone tissues indicating 87.15% of the newly formed bone area and osteointegration showing 83.75% of the bone–implant contact area even in the presence of injected S. aureus. The laser-cladded Ag7ZnO3HA composite coatings are promising metallic implants with excellent intrinsic antibacterial activity and osteointegration ability.
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DOI
PubMed
高影响因子
IONICS
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2026
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IF 3.4
M Jayashree,C. V Manjunatha,Venkataramanappa Y.
A novel Co-Ni-ZnO decorated nitrogen-doped graphene oxide (Co-Ni-ZnO/NGO) nanocomposite was synthesized via hydrothermal and co-precipitation methods followed by calcination for sensitive electrochemical nitrite detection. The synthesized nanocomposite was characterized by UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). FTIR confirmed the formation of metal-oxygen bonds, while XRD revealed a crystalline structure with an average crystallite size of 25 nm. SEM analysis demonstrated the uniform distribution of Co-Ni-ZnO nanoparticles on NGO sheets with an average particle size of approximately 29 nm, and EDX confirmed the presence of C, O, Co, Ni, and Zn elements. The electrochemical performance of the Co-Ni-ZnO/NGO modified glassy carbon electrode (GCE) was investigated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). The modified electrode exhibited enhanced electrocatalytic activity toward nitrite oxidation due to the synergistic interaction between the trimetal oxide nanoparticles and the conductive NGO matrix. Under optimized conditions, the sensor displayed a linear response range of 1.5–78 µM, a sensitivity of 1.945 µA µM⁻¹ cm⁻², and a low detection limit of 3.87 nM (R² = 0.9918). In addition, the sensor demonstrated excellent selectivity, reproducibility, and stability. Recovery studies in food and environmental samples confirmed its practical applicability. These results suggest that the Co-Ni-ZnO/NGO nanocomposite is a promising electrocatalytic material for reliable nitrite detection in environmental monitoring and food safety applications. Graphical abstract Scheme 1. Schematic illustration of the synthesis of the Co-Ni-ZnO/Nitrogen-Doped Graphene Oxide (Co-Ni-ZnO/NGO) nanocomposite and its proposed electrocatalytic mechanism for electrochemical nitrite detection
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DOI
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
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2026
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IF 3.6
Gaoliang Zhou,Peng Chen,Jiawei Yang,Bo He,Huanhuan Wei,Shanshan Jiang,Qingxuan Li,Gang He
The advancement of brain-inspired computing hinges on the development of efficient neuromorphic synaptic devices. One-dimensional metal-oxide nanofiber transistors have garnered significant attention in artificial synaptic devices due to their unique structural and optoelectronic properties. This work presents synaptic transistors based on arrayed coaxial heterojunction nanofibers (ITO/ZnO) fabricated via electrospinning. The unique radial core-shell structure facilitates superior synaptic performances, including ultraviolet (UV)-light-modulated synaptic plasticity with a high paired-pulse facilitation (PPF) index up to 286%. A constructed neural network for handwritten digit recognition achieves an accuracy of 97.6%, demonstrating its potential for neuromorphic computing. Furthermore, we explore multimodal sensory integration by developing a device that responds to both optical and acoustic stimuli, enabling dynamic logic operations. This work highlights the significant potential of nanostructure-engineered synaptic devices for next-generation artificial intelligence and interactive systems.
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DOI
高影响因子
Chem Catalysis
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2026
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IF 10.7
Yuan Yuan,Xitang Qian,Shiyuan Liu,Weiwei Chen,Minglei Lu,Ernest Pahuyo Delmo,Yan Zhang,Yao Yao,Yuxiang Lyu,Yushen Liu,Dong Su,Minhua Shao
Efficient electrocatalytic nitrogen oxidation reaction (eNOR) requires promoting N 2 activation while minimizing the competing oxygen evolution reaction (OER). A compartmentalized La-ZnO core-shell electrocatalyst is constructed to mimic cellular functional segregation. The crystalline ZnO shell acts as a selective interface that enriches N 2 and limits OH − adsorption, thereby reducing the OER current. Beneath the shell, a porous amorphous oxygen-deficient core exposes dynamically accessible undercoordinated Zn–O–La sites. These sites promote stabilization of key intermediates, including ∗N 2 O 2 − , and support stepwise conversion after N 2 adsorption activation and oxidation. This spatial separation lowers the overall energetic demand along the 10-electron NOR pathway in alkaline electrolyte. The electrocatalyst reaches a Faradaic efficiency of 40.4% and a nitrate yield rate of 11.9 μmol mg −1 h −1 .
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 23
·1842
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IF 3.2
Zhang Junda,Li Chenyu,Wang Chongyan,Ke Jingli,Wang Yunpeng,Ma Haitao
With the development of advanced electronic packaging technologies, higher requirements have been placed on the service reliability of low-temperature solders. However, Bi-rich phase coarsening and excessive growth of interfacial intermetallic compound (IMC) in Sn58Bi solder restrict its engineering applications. In order to improve the microstructure and mechanical reliability of Sn58Bi solder, Ag-coated ZnO (ZnO@Ag) nanoparticles were successfully fabricated by electroless silver plating and Sn58Bi-xZnO@Ag (x = 0, 0.3, 0.5, 0.7, and 1.0 wt.%) composite solders were prepared by ball milling. The effects of ZnO@Ag addition on the wettability of solder joints, matrix microstructure, interfacial IMC growth, and shear properties were systematically investigated. The results showed that the addition of 0.3 wt% ZnO@Ag exhibited the optimal strengthening effect. Compared with the unreinforced Sn58Bi solder, the wetting angle decreased from 39.18° to 36.32°, the Bi-rich phase became finer with the number fraction of fine Bi-rich phase regions (0.1 < A ≤ 1 μm 2 ) reaching 31.78%. Meanwhile, the average thickness of the interfacial IMC decreased from 0.85 μm to 0.67 μm. Ultimately, the shear strength of the solder joints increased from 51.49 MPa to 69.62 MPa. The performance improvement may be attributed to the synergistic effects of heterogeneous nucleation, grain-boundary pinning, and interfacial diffusion blocking induced by the ZnO@Ag nanoparticles. This study demonstrates that the appropriate addition of ZnO@Ag is an effective approach for improving the reliability of Sn58Bi low-temperature solder, which can provide a reference for the design of high-reliability low-temperature lead-free composite solder.
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高影响因子
LANGMUIR
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2026
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IF 4.4
Sehrish Ibrahim,Wensheng Xie,Xiaofeng Li,Guofeng Li,Xing Wang
Engineering interfacial electronic interactions between physically distinct metal oxides without phase transformation, doping, or lattice fusion remains a central challenge of interface science. Conventional Cu2O–ZnO systems rely on heterojunction formation or compositional mixing, whereas carbon-mediated electronic coupling between discrete phases remains largely unexplored. Here, we report strongly electronically coupled carbon-bridged Cu2O/ZnO nanocomposites (Cu2O–C–ZnO NCs) synthesized by incorporating spherical Cu2O and diamond-shaped ZnO nanoparticles into a gallic-acid-derived carbon framework. Structural and compositional analyses confirm the coexistence of crystalline Cu2O and ZnO interlocked in a homogeneous carbon matrix, with oxygenated carbon functionalities verified spectroscopically. X-ray photoelectron spectroscopy reveals binding energy shifts in Cu and Zn core levels, providing direct evidence of interfacial electronic coupling and charge redistribution without lattice fusion or heterojunction formation. This electronic interface coupling helps regulate charge transfer between the oxide materials, allowing the controlled release of metal ions and enhancing the generation of reactive oxygen species. As a functional consequence, the NCs exhibit significant antibacterial activity against Gram-negative and Gram-positive bacteria, as well as substantial antialgal activity against freshwater species. Mechanistic evidence validates that the activity stems from a synergy of phenomena, including controlled ion release, ROS, and membrane damage due to oxidative stress, supported by findings from enzymatic and cellular assays. These results demonstrate that carbon-mediated interfacial electronic coupling is a viable method for controlling the surface reactivity of multicomponent oxide systems with the intact structural integrity of individual components.
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DOI
PubMed
高影响因子
ACS Catalysis
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2026
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IF 13.6
Xianglong Meng,Yanjiao Wang,Ruiping Deng,Soryong Chae,Chunzheng Wang,Girolamo Giordano,Zifeng Yan,Hailing Guo,Svetlana Mintova
A strategy for synthesizing bimetallic catalysts confined within zeolite frameworks, offering a promising approach for stabilizing metal species under harsh reaction conditions, is disclosed. A dual-stage synthesis strategy including alkali etching to open the channels of Silicalite-1 (S-1) zeolite, exposing internal hydroxyl defects that serve as anchoring sites for Cu and Zn species, is presented. This was followed by a dry-gel conversion encapsulation step to yield Cu-ZnO@S-1 catalyst. The competitive occupation of these sites by Cu and Zn facilitates the formation of high-density Cu-ZnO interfaces. Under reaction conditions of 3 MPa and 250 °C, the catalyst achieves a methanol selectivity above 99.2% and a space-time yield (STY) of 2.1 g gCu–1 h–1, nearly four times higher than that of copper-containing catalyst (Cu@S-1, 0.54 g gCu–1 h–1) and significantly outperforming the sample prepared by conventional impregnation (Cu-ZnO/S-1, 1.6 g gCu–1 h–1). The oxygen-deficient Cu-ZnO1–x sites at the Cu-ZnO interface are further demonstrated to serve as genuine active centers for methanol synthesis. The methanol formation reaction proceeds via the formate pathway, and the high density of Cu-ZnO1–x sites effectively lowers the activation barrier for the hydrogenation of *HCOO to *H2COO.
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ACS Catalysis
·
2026
·
IF 13.6
Jiajing Kou,Chuntao Han,Bo Yu,Chong Liu,Bo Li,Deng Zhao,Rui Ma
The intrinsic activity-stability trade-off remains a fundamental constraint for metal oxide catalysts in propane dehydrogenation (PDH). Herein, we break this limitation via a well-defined dual-site catalyst comprising ZnO clusters and adjacent Ni single atoms on γ-Al2O3, constructed through a metal-doped carbon dot precursor strategy. This configuration achieves a 5-fold and 2-fold enhancement in propylene formation rate compared to the sole Ni and ZnO catalysts, respectively, while maintaining high propylene selectivity (>93%) and long-term stability over 100 h. Combined kinetic and in situ spectroscopic studies establish a cooperative mechanism wherein under-coordinated Zn2+ sites serve as the primary centers for C−H activation, while neighboring (Ni−)O sites function as dynamic regulators of interfacial hydrogen transfer. Direct evidence from temperature-programmed D2 adsorption and time-resolved propane DRIFTS reveals that the hydrogen transfer rate scales linearly with Ni loading, correlating inversely with the apparent activation energy for dehydrogenation. This (Ni−)O-mediated process dynamically reduces surface hydrogen coverage on ZnO, lowers the energy barrier for C−H cleavage, and concurrently suppresses C−C cracking pathways. This work establishes a design paradigm of using atomically dispersed metals as kinetic regulators of surface hydrogen dynamics, shifting the promoter role from static modifier to active mediator of surface pathways, offering a general strategy for advanced metal oxide catalyst design in alkane dehydrogenation.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Liyan Wang,Xiaojun Yang,Yuhang Tan,Yu Li,Zhipeng Wang,Jian Song
Due to the complicated component of ZnCr oxides, the function of the active phases remains controversy, limiting its improvement of catalytic performance for converting syngas to higher alcohols. Herein, a series of ZnCr catalysts with tunable ZnO/ZnCr 2 O 4 molar ratios were fabricated via ball milling of the two individual oxides. Within the ZnO:ZnCr 2 O 4 range of 1:1 to 0.5:1, both CO conversion (18.5%) and isobutanol selectivity (29.0%) were significantly enhanced, while the water‑gas shift reaction and hydrocarbon formation were effectively suppressed. This improved performance originated from synergistic interface effects as revealed by the systematic characterization (XPS, CO‑TPD, and in situ DRIFTS etc.). Lattice distortion and electronic interaction at the interface induced the producing of octahedrally coordinated Zn 2+ sites on ZnCr 2 O 4 , strengthening CO adsorption, meanwhile, ZnO promoted interface hydrogen migration and hydroxyl cycling, steering the CHO* intermediate formation and facilitating C–C coupling. Furthermore, the electron‑rich lattice oxygen at the interface, with moderate basicity, served as active sites for β addition reaction of C 2 intermediate and carbon‑chain growth. These findings clarify the critical role of dual‑phase interface structure in regulating the reaction pathway during syngas conversion, providing a new strategy for the design of high‑performance catalysts for isobutanol synthesis.
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Fengping Peng,Xuan Kai,Wei Wang,Chunzheng Wu
Converting N 2 into ammonia under ambient conditions using mechanical energy-driven piezocatalysis represents a promising approach for sustainable nitrogen fixation, although its efficiency is often limited by insufficient nitrogen activation and rapid recombination of piezo-induced charge carriers. Herein, bi-piezoelectric ZnO-ZnS heterostructures were successfully constructed through a post-synthetic anion exchange strategy using electrospun ZnO as the precursor. The gradual O 2– to S 2- exchange process generated a core–shell structure composed of a ZnO core and a porous ZnS shell while preserving favorable interfacial coupling between the two piezoelectric phases. The optimized heterostructure achieved significantly enhanced ammonia production, delivering yields 2.1 and 8.9 times higher than those of ZnO and ZnS, respectively, and 2.5 times higher than a physical mixture of ZnO and ZnS with similar composition. This enhancement was also observed in dye degradation, demonstrating the general applicability of the heterostructure design. Mechanistic studies revealed that the improved performance originates from enhanced piezoelectric polarization, more efficient spatial charge separation, and abundant surface active sites that promote N 2 adsorption and activation. This work provides an effective strategy for constructing strongly coupled bi-piezoelectric heterostructures and highlights the importance of interface engineering for efficient piezocatalytic nitrogen fixation.
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高影响因子
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