IEEE SENSORS JOURNAL
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2026
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IF 4.5
Feiyan Pan,Keqi Wu,Shuo Wang,Ke Tang,Xuewei Zhu,Xiaofeng Wei
Hollow nanostructured materials possess a large specific surface area and excellent adsorptive properties, rendering them highly attractive for gas-sensing applications. In this work, a porous core-shell CeO2 architecture was synthesized via a hydrothermal route and subsequently functionalized with polyethyleneimine/polyethylene glycol (PEI/PEG) to yield PEI/PEG/CeO2 composites for room-temperature CO2 detection. Scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface-area analyses confirmed the high specific surface area and the formation of the porous core-shell CeO2 morphology, while SEM coupled with energy-dispersive X-ray spectroscopy (EDS) verified successful immobilization of PEI/PEG on the CeO2 surface. Gas-sensing tests demonstrated that the PEI/PEG/CeO2 sensor achieved a detection limit as low as 200 ppm CO2; at 1500 ppm CO2, the sensor exhibited a frequency shift of 86 Hz and rapid response/recovery times of 22 s and 70 s, respectively. Furthermore, the sensor showed high sensitivity,excellent repeatability and strong resistance to humidity. The outstanding CO2-sensing performance is attributed to the synergistic effects of the porous core-shell structure, the selective recognition afforded by the amine functional groups, and the formation of n-n heterojunctions at the CeO2-PEI interface. These findings provide deeper insight into the gas-sensing mechanisms and performance characteristics of PEI/PEG-functionalized CeO2 composites.
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高影响因子
ACS Sensors
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2026
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IF 10.9
Yueru Jiang,Yu Wang,Tianshuang Wang,Liupeng Zhao,Dan Li,Xueying Kou,Peng Sun,Geyu Lu
Recent advances in flexible metal-organic framework (MOF) films have injected momentum into the development of wearable gas sensors. However, current MOF-based wearable sensors suffer from mutual interference and often compromise in power consumption and wearing comfort, limiting their suitability for skin-interfaced applications. Here, we report a wireless, battery-free, wearable gas sensor patch based on a flexible inductance-capacitance (LC) resonator. This sensor features a bilayer flexible film composed of a 2D bimetallic Cu/Co-HHTP conjugate MOF (c-MOF) sensing layer and a Pd/SSZ-13 zeolite overlayer. Specifically, the zeolite overlayer functions as an NO2-adsorbing interface that captures incoming NO2 molecules, thereby preventing them from reacting with the underlying 2D c-MOF sensing layer. Accordingly, the wireless sensor achieves linear and interference-resistant detection of low concentrated NH3 even in the presence of NO2, while maintaining excellent mechanical flexibility, cyclic stability, and negligible baseline drift, exhibiting less than 6.2% response attenuation after repeated bending at 120°. The performance of the device is further validated through a skin-adherent, wireless, passive sensing system capable of continuous NH3 monitoring in complex environments. The proposed wireless wearable MOF-based sensor patch is highly transformative, offering benefits for various wearable applications. Device performance under high-humidity conditions is still constrained, indicating that further optimization is necessary.
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PubMed
高影响因子
Chemosensors
·
2026
·Vol. 14
·期 4
·91
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IF 4.4
Zhenghe Li,Zhonghang Xia,Huiming Ji,Yiwen Zhang
To detect volatile organic compounds, fabricating gas sensors with high sensitivity, excellent selectivity, low detection limits, and good long-term stability is critical. Herein, Er1/3Yb1/3La1/3FeO3medium-entropy material was synthesized via the sol–gel method and characterized in terms of its morphological, structural, and chemical properties. The medium-entropy design induces significant lattice distortion and increased oxygen vacancies, leading to higher adsorbed oxygen content and hole concentration on the material surface, which enhances the activity of gas-sensing reactions. The Er1/3Yb1/3La1/3FeO3sensor exhibits a response of 13.2 toward 10 ppm of butanone gas at the optimum operating temperature of 192 °C, which is nearly three times the response of the ErFeO3sensor (4.5), along with excellent selectivity to butanone gas, a low detection limit (0.5 ppm), and long-term stability. Moreover, the applied magnetic fields improve the ordering of magnetic moments in both Er1/3Yb1/3La1/3FeO3and O2molecules, which facilitates gas adsorption and electron transfer, and further boosts the gas-sensing performance. The response of the Er1/3Yb1/3La1/3FeO3sensor toward 10 ppm butanone is enhanced to 21.3 under the applied magnetic field of 680 mT, which improves the selectivity toward butanone. This work provides a novel material design strategy for the detection of VOCs and a feasible magnetic field-assisted approach for optimizing the gas-sensing performance of perovskite ferrite materials.
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iScience
·
2026
·Vol. 29
·期 3
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IF 4.5
Jinqiao Hou,Yan Wang,Xinge Cui,Huanming Wang,Chong Li,Fujian Ren,Chenze Lu,Ziqian Chen,Yuzhi Chen,Jingting Luo,Xuejin Li,Ran Tao
Isopropanol (IPA), a volatile organic compound linked to diabetic ketosis (DK), has emerged as a critical biomarker for early diabetes detection and management. Developing portable, room-temperature sensors for exhaled IPA analysis could enable non-invasive, point-of-care diagnostics. Here, we present a compact, surface plasmon resonance (SPR) fiber-optic sensor functionalized with Pt-doped ZnO nanoparticles for ultrasensitive IPA detection at room temperature. This material design amplifies the sensing performance through a synergetic effect of the catalysis of oxygen chemisorption on the ZnO and electronic sensitization by the Pt/ZnO Schottky junction. Systematic evaluation demonstrates that operating stably at 26 °C, the sensor exhibits a remarkable sensitivity of −0.405 a.u./ppm, a detection limit of 7.407 ppm, and high interference resistance. This successful integration of nanomaterial-enhanced sensitivity with a portable fiber-optic platform offers a transformative route for developing accessible tools for early diabetes detection and personalized metabolic monitoring.
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SENSORS AND ACTUATORS B-CHEMICAL
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2026
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IF 8.3
Zhihua Zhao,Bingbing Wang,Yao Wang,Huiqin Li,Zhenzhen Yang
Ammonia (NH 3 ) is a toxic and pungent gas with significant implications for environmental monitoring, industrial safety, and human health. Therefore, the development of high-performance sensors for NH 3 detection at room temperature is of great necessity. This work develops a Bi 2 MoO 6 /Ti 3 C 2 T x 2D/2D heterostructure-based NH 3 gas sensor. The material demonstrated outstanding NH 3 sensing characteristics, involving high sensitivity (R a /R g =25.6 at 100 ppm), quick response time (21 s), and quick recovery time (72 s) at room temperature. Meanwhile, the sensor demonstrated prominent stability, repeatability, humidity-resistant, and an optimal operating temperature for NH 3 detection. Density functional theory (DFT) simulations were applied to examine the adsorption behavior of NH 3 on the Bi 2 MoO 6 /Ti 3 C 2 T X surface, which shed light on the sensing process. Additionally, a prototype detection system was developed to monitor NH 3 emissions from spoiled fish samples, illustrating how this sensor could be applied to monitor food safety.
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高影响因子
Journal of the American Chemical Society
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2026
·
IF 16.6
Yi Wang,Zhengzhuo Li,Yanhui Gao,Xinlong Cai,Yamin Wang,Enyu Gao,Jingjing Shen,Quli Fan,Lei Zhang
Abstract Understanding the dynamic and heterogeneous behavior of gas-generating catalysts at the single-nanoparticle level is important to address many chemical and biological challenges. Most current studies rely on ensemble analysis, which fails to capture the unique and critical catalytic kinetics inherent in single nanocatalysts. Herein, we developed an integrated dark-field microscopy (DFM) platform with multimodal analysis capabilities to investigate gas-generating catalysis at the single-nanoparticle level, using the decomposition of H2O2 by MnO2 nanoparticles as a model reaction. By tracking scattering intensity fluctuations, nanobubble localization, and nanoparticle motion, we uncover the dynamic and heterogeneous behavior of individual catalysts. The catalytic activity exhibits intermittent high/low fluctuations following power-law kinetics, revealing the stochastic nature of single-nanoparticle catalysis. Spatial analysis of nanobubble localization reveals heterogeneous catalytic activity with preferential O2 nanobubble formation at nanoparticle edges and corners. Furthermore, we demonstrate that catalytic gas release induces detectable lateral nanoparticle motion through asymmetric O2 release, offering a mechanical readout of the catalytic activity. Systematic variation in H2O2 concentration and surfactant environment allows us to correlate optical and mechanical signatures with changes in the interfacial chemistry. This comprehensive approach not only improves our understanding of single-nanoparticle catalysis but also provides a framework for studying diverse gas-evolving reactions with potential applications in energy, environmental science, and nanomotor technology.
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高影响因子
LANGMUIR
·
2026
·
IF 4.4
Yajie Ni,Jiamin Yu,Aaron Feng,Weiqian Liao,Xia Sheng
Abstract Photocatalytic Achmatowicz rearrangement of furfuryl alcohol (FFA) is a sustainable route to synthesizing high-value pyranone (PN) bioactive intermediates. The conversion of O2 to singlet oxygen (1O2) is critical for selective PN formation. Constructing a gas–liquid–solid triphase system offers an alternative strategy to boost such O2-involved catalysis. However, current triphase systems are typically fabricated by depositing hydrophilic catalysts on superhydrophobic substrates. The triphasic interface only forms at the regions where the catalyst is in contact with the substrate, whereas O2 inside the catalyst layer still suffers from sluggish diffusion and insufficient local concentration. Herein, we design and construct a triphase system with micro- and nano-scale hierarchical gas channels for photocatalytic Achmatowicz rearrangement. Core–shell silicalite-1@TiO2 (S-1@TiO2) is synthesized by coating TiO2 on zeolite silicalite-1 (S-1). The internal nano-scale hydrophobic channels of S-1 act as O2 storage reservoirs and transport pathways, forming localized microscopic triphase interfaces within the catalyst layer. A hierarchical triphase interface system is constructed by further immobilizing S-1@TiO2 onto superhydrophobic substrates with micro-scale pores, enabling continuous atmospheric O2 to diffuse into the nano-scale hydrophobic channels. Benefiting from the synergistic effect of micro- and nano-scale hierarchical gas channels, the hierarchical triphase system exhibits much improved PN production and selectivity, and its catalytic active site utilization efficiency reaches 5-fold that of conventional triphase systems. This work provides insights into the rational regulation of triphase microenvironments for the construction of high-efficiency photocatalytic systems.
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高影响因子
CERAMICS INTERNATIONAL
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2026
·
IF 6
Shuaihu Chen,Mengjie Han,Jinyong Xu,Kaidi Wu,Chao Zhang
Eu 3+ -doped YFeO 3 perovskites were synthesized via a sol-gel method for isopropanol detection. • Eu 0.04 Y 0.96 FeO 3 exhibits over twice the response of pure YFeO 3 to 0.4 ppm isopropanol (3.45 vs. 1.67). • The sensor shows an ultra-low detection limit of 50.6 ppb and good humidity tolerance. • Eu 3+ doping narrows the band gap and increases O V and O C , boosting gas-sensing performance. In recent years, analyzing breath has become a potential non-invasive approach for early lung cancer screening. This study synthesized Eu 3+ -doped Eu x Y 1-x FeO 3 (x = 0%, 2%, 4%, 6%, 8%) perovskite materials using the sol-gel method for detecting isopropanol in the lung cancer patients’ breath. The influence of Eu 3+ doping on structural, morphological, surface chemical, and gas-sensing characteristics was systematically investigated. It was found that Eu 3+ effectively substituted for Y 3+ within the YFeO 3 lattice, resulting in lattice expansion, increased specific surface area, and optimized oxygen vacancy distribution. Among all the samples, Eu 0.04 Y 0.96 FeO 3 (EYFO-4) exhibited the best overall sensing performance, including high response ( 3.45@0.4 ppm, more than twice that of pure YFeO 3 ), low detection limit (50.6 ppb), excellent linearity (R 2 = 99.65%), outstanding repeatability, and strong humidity tolerance. The performance improvement was attributed to Eu-induced band gap narrowing, increased chemically adsorbed oxygen species, and improved carrier transport. This study offers a promising material-based approach for constructing advanced sensors aimed at the non-invasive diagnosis of lung cancer. Download: Download high-res image (462KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Shuai Liu,Yuhao Yan,Xiaonan Liang,Jiadu Wen,Chaochao Zhang,Guoxiang Chen
A multimodal framework predicts gas-sensing responses of 2D materials using structural, dynamic, and physical features. • Intermediate fusion aids rapid screening/temperature optimization with R²=0.88, +11% vs early, validated by MoS₂ experiments. • DFT reveals that TEA-induced band-gap narrowing explains the superior gas-sensing response. Two-dimensional (2D) materials show promise for gas sensing, yet efficient prediction remains challenging due to trial-and-error experiments. In this study, we integrated multimodal data with deep learning to predict the sensing responses of 2D material-based gas sensors. By compiling data from the literature and relevant databases, we constructed a curated dataset comprising 254 samples covering 10 distinct 2D materials and 14 target gases. Three orthogonal structural views of materials and gases were used as structural modalities, coupled with physical properties and dynamic response features to develop multimodal deep learning models via early and intermediate fusion. Five-fold cross-validation showed that the intermediate fusion strategy outperformed early fusion, achieving a mean R 2 of 0.88 and a mean MAE of 0.76. Furthermore, SHAP analysis indicated that dynamic response features contributed the most to the predictions, with three geometry-derived structural features ranking among the five most important features. Commercial MoS₂ sensors experimentally confirmed the model's predicted gas selectivity, with triethylamine (TEA) response about four times higher than for HCHO and CH₃OH, consistent with observations, and with minimum prediction errors of about 3% for HCHO and CH₃OH at 380 K and about 8% for TEA at 407 K. DFT calculations confirmed physisorption of HCHO, CH₃OH, and TEA on MoS₂, with TEA exhibiting the strongest adsorption. TEA also induced the largest band-gap reduction, providing a microscopic explanation for its higher sensing response. This study provides a data-driven framework for accelerating the evaluation and performance prediction of 2D gas-sensing materials, supported by experimental and theoretical validation. Download: Download high-res image (166KB) Download: Download full-size image
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高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Xiuyu Liu,Yabei Jin,Yefang Gao,Sujun Zhu,Zedong Gong,Yanbei Hou,Yuan Fang,Xiaoyan Du,Gang Tang
Inspired by the hierarchical structures of biological systems and interfacial engineering principles, this study focuses on developing sustainable biobased flame retardants to address rigid polyurethane foam (RPUF)’s intrinsic flammability and poor thermal stability. A hierarchical cellulose nanofibril/polydopamine/Fe3+ aerogel coating was fabricated on RPUF via vacuum freeze-drying, and its effects on RPUF’s thermal stability, flame retardancy, and char-forming behavior were systematically investigated. Thermogravimetric analysis showed the coating significantly improved RPUF’s thermal stability, with char residue at 800 °C increasing by 122% compared with the uncoated sample. The coated RPUF achieved a limiting oxygen index of 60 vol %, indicating greatly enhanced flame retardancy. Cone calorimeter tests confirmed the coating prolonged ignition time, reduced peak heat release rate and total heat release, increased fire performance index, and decreased fire growth index, exhibiting excellent fire protection efficiency. Its good flame retardancy stems from the superior gas–solid synergistic effect: a dense, highly graphitized char layer forms on RPUF composite during combustion to act as a protective barrier, and nonflammable gas dilutes combustibles via condensed-gas phase synergy. This work provides theoretical and experimental support for biobased aerogel flame-retardant design and holds potential in construction fire protection.
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高影响因子
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
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2026
·
IF 7
Yi-an Xu,Yuhao Wang,Jiaxin Liu,Jiale Quan,Yu Yuan,Haoying Pang,Zhihong Wu,Zhuangsheng Zhu
Alkali metal vapor cells are fundamental components in quantum sensors, and their relaxation characteristics critically influence both sensitivity and system stability. In Spin-Exchange Relaxation-Free (SERF) atomic magnetometers, although spin-exchange collisions are effectively suppressed, wall-collision-induced relaxation remains the primary limiting factor. A coating-enabled buffer-gas-free vapor cell (CBF-VC) is proposed as a novel sensor unit, realized through multilayer octadecyltrichlorosilane (OTS) selfassembled molecular coatings. The CBF-VC is integrated into a single-beam SERF atomic magnetometer, and experimental validation is conducted. The results indicate a significant extension of the wall collision relaxation time from 40.19 ms. This extended relaxation time directly enhances the magnetometer sensitivity by 48%, confirming the feasibility of CBF-VCs as a measurement-oriented vapor cell architecture. The findings demonstrate not only the effectiveness of anti-relaxation coatings, but also a new instrumentation pathway for advancing next-generation quantum sensing.
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Haoran Liu,Yihua Li,Junlong Geng,Jiao Jiao,Changfei Gao,Lifen Liu,Baicang Liu
graphene oxide (GO), thiosemicarbazide (TSC) and polyamide (PA) are cross-linked for desalination treatment • The GO/TSC/PA composite membrane exhibits high desalination performance (>99.5%) towards shale gas wastewater • The GO/TSC/PA composite membrane shows good stability after 5-cycled operation The high salinity of shale gas wastewater (abbreviated as SGW) renders it exceptionally challenging for conventional wastewater treatment. This study used graphene oxide (GO) nanosheets as an effective filtration layer and porous ceramic as a substrate for SGW desalination. To enhance the stability between the GO layer and the ceramic and simultaneously mitigate GO swelling, polyamide (PA) and thiosemicarbazide (TSC) were both introduced as cross-linkers. Results indicated that the as-prepared GO/TSC/PA composite membrane exhibited high stability during the pervaporation desalination process, primarily due to the introduction of amino groups. Under optimized conditions, the GO/TSC/PA composite membrane achieved a maximum water flux of 4.87 L/(m 2 ·h) and a highest salt rejection efficiency exceeding 99.50%. The precise ionic composition and concentrations of the SGW were analyzed, and the removal rate for each ion was also determined. This study provides a novel approach for preparing GO-based membranes to address the challenges of industrial wastewater desalination. Synopsis: Download: Download high-res image (232KB) Download: Download full-size image A high-performance, stable graphene oxide (GO)/thiosemicarbazide (TSC)/polyamide (PA) composite membrane was prepared and used for desalinating shale gas wastewater (SGW)
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高影响因子
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