Sensors and Actuators B: Chemical最新文献

Corrigendum to “Ultrasensitive miRNA-135a-5p biochip for early Alzheimer's disease detection utilizing magneto-optical faraday effect and magnetoplasmonic nanoparticles” [Sens. Actuators B: Chem. 427 (2025): 137134] “利用磁光法拉第效应和磁等离子体纳米颗粒检测早期阿尔茨海默病的超灵敏miRNA-135a-5p生物芯片”的勘误表[j] .机械工程学报，2012,27(2025):137134。

IF 3.7 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-19 DOI: 10.1016/j.snb.2025.138994

Chin-Wei Lin , Jing-Han Huang , Po-Han Lin , Ting-Bin Chen , Li-Min Wang , Yu-Ching Huang , Kuen-Lin Chen

引用次数: 0

Triple-Loop Dynamic DNA Nanonetwork with Cascaded Signal Amplification toward Self-Validating MicroRNA Biosensing 具有级联信号放大的三环动态DNA纳米网络用于自我验证的MicroRNA生物传感

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-19 DOI: 10.1016/j.snb.2025.139002

Changyuan Zhang, Jingling Wu, Xilin Zhang, Yuzhe Cai, Mengyu Zhang, Jingling Zhang, Qin Xu, Jing Li, Hongbo Li

{"title":"Triple-Loop Dynamic DNA Nanonetwork with Cascaded Signal Amplification toward Self-Validating MicroRNA Biosensing","authors":"Changyuan Zhang, Jingling Wu, Xilin Zhang, Yuzhe Cai, Mengyu Zhang, Jingling Zhang, Qin Xu, Jing Li, Hongbo Li","doi":"10.1016/j.snb.2025.139002","DOIUrl":"https://doi.org/10.1016/j.snb.2025.139002","url":null,"abstract":"MicroRNAs, critical mediators of epigenetic regulation, govern vital biological processes with dysregulation linked to diseases, yet their low abundance and high sequence homology impose dual challenges on detection sensitivity and specificity. To overcome these limitations, a fluorescence and photoelectrochemical dual-mode biosensor was engineered, employing an entropy-driven circuit (EDC) and DNAzyme-based triple-loop cascade nanonetwork. Target recognition initiates EDC-mediated release of the resulting products, simultaneously activating DNAzyme I and DNAzyme II to produce target analogues (T*), thereby establishing a dual-amplification loop in which T* triggers EDC feedback to form a cascaded amplification nanonetwork. Signal transduction was enabled by CdS quantum dots (QDs), with the response synergistically amplified by g-C3N4 nanosheets to achieve enhanced photoelectrochemical performance. Furthermore, the elaborately designed positive feedback triple amplification system substantially improves the sensor's detection sensitivity. Specifically, the EDC amplification module maximizes the utilization of DNA strands, thereby significantly enhancing both operational efficiency and cost-effectiveness. Additionally, the precisely engineered triple amplification nanonetwork combined with magnetic extraction substantially improves the sensor's resistance to interference from potential coexisting substances, thereby enhancing its specificity and stability. Moreover, the dual-signal output mechanism in this design enables mutual validation of the detection results, further reinforcing the reliability and credibility of the assay outcomes.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"116 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-Readout Analysis of Chymotrypsin Activity Based on Multifunctional Lanthanide Metal-Organic Framework 基于多功能镧系金属-有机骨架的凝乳胰蛋白酶活性双读数分析

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-19 DOI: 10.1016/j.snb.2025.139003

Qi Xu, Long Yu, Yumin Feng, Hong Cheng, Yuxiu Xiao

{"title":"Dual-Readout Analysis of Chymotrypsin Activity Based on Multifunctional Lanthanide Metal-Organic Framework","authors":"Qi Xu, Long Yu, Yumin Feng, Hong Cheng, Yuxiu Xiao","doi":"10.1016/j.snb.2025.139003","DOIUrl":"https://doi.org/10.1016/j.snb.2025.139003","url":null,"abstract":"A ratiometric fluorescence/chromaticity dual-readout method is developed for chymotrypsin (ChT) activity detection, integrating a multifunctional lanthanide metal-organic framework (Ln-MOF) and an enzyme-activated fluorogenic reaction. A novel non-peptide substrate, 3-hydroxyphenyl-4-bromobutanoate (3-HPB), is rationally designed by coupling the catalytic specificity of ChT with a resorcinol-involved azamanidine fluorogenic reaction. Upon ChT-catalyzed hydrolysis, 3-HPB releases resorcinol, which subsequently reacts with dopamine to produce blue fluorescent azamanidine. In this reaction system, Eu-BTEC, a Ln-MOF constructed from Eu3+ and pyromellitic acid (H4BTEC), serves not only as a red fluorescent internal standard, but also facilitates confined catalysis and enhances the fluorogenic reaction. A ratiometric fluorescence method is thus established to detect ChT activity in human saliva. Furthermore, a portable visual device composed of a UV lamp and an illuminance meter enables ratiometric chromaticity (B/R) analysis. Both methods have low detection limits (0.0107 U mL-1 and 0.0144 U mL-1) and high accuracy (82.4-107.0% recovery). The ChT activities in real human saliva samples obtained by both methods are in good agreement (p > 0.05). This work not only presents a new strategy for ChT activity detection but also introduces a structure-simple, affinity-high substrate, offering a promising platform for future development of sensitive and reliable enzymatic assays.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"12 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145314726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distance-Based Paper Microfluidic Analytical Device Using Aptamer Functionalized Silver Nanomaterial for Aflatoxin B1 Quantification in Food Products 应用适配体功能化银纳米材料的远距离纸微流控分析装置定量测定食品中黄曲霉毒素B1

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-18 DOI: 10.1016/j.snb.2025.138999

Kawin Khachornsakkul, Thithawat Trakoolwilaiwan, Tapparath Leelasattarathkul

{"title":"Distance-Based Paper Microfluidic Analytical Device Using Aptamer Functionalized Silver Nanomaterial for Aflatoxin B1 Quantification in Food Products","authors":"Kawin Khachornsakkul, Thithawat Trakoolwilaiwan, Tapparath Leelasattarathkul","doi":"10.1016/j.snb.2025.138999","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138999","url":null,"abstract":"In this article, a simple and affordable distance-based paper analytical device (dPAD) for the quantitative detection of aflatoxin B1 (AFB1) in agricultural food products has been successfully developed. The sensing assay is based on the salt-induced aggregation of silver nanoparticles (AgNPs), which exhibit a localized surface plasmon resonance (LSPR) response. This aggregation is triggered by the specific binding between AFB1 and aptamers pre-deposited on the detection zone of the sensor. When AFB1 binds to the aptamer, the released AgNPs interact with salt flowing through the channel, leading to nanoparticle aggregation and a visible colour change from yellow to orange-brown. The concentration of AFB1 can then be easily determined by measuring the length of the resulting colour band along the channel. The sensor provided a linear range between 0.3 and 0.8 ng mL-1 (R2 = 0.9986) with a detection limit (LOD) of 0.05 ng mL-1, with the fast reaction time of 8 min. It also exhibits excellent detection selectivity, with no significant interference from other compounds. The method demonstrates excellent accuracy and precision for AFB1 monitoring in food products, including corn, wheat, and peanut, with recovery ranging from 95.0% to 105.0% with the highest relative standard deviation (RSD) of 4.8%. By integrating microfluidics, nanomaterials, and aptamers, this technique shows great promise for the sensitive and selective detection of AFB1. Moreover, it represents a significant step forward in developing low-cost analytical platforms for a wide range of target molecules, making it highly applicable for real-world applications.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"95 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct growth of ZnO@ZIF-71 nanosheets on Al2O3 ceramic tubes for fabricating a highly selective and humidity-resistant NH3 sensor 在Al2O3陶瓷管上直接生长ZnO@ZIF-71纳米片，用于制造高选择性和耐湿的NH3传感器

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-18 DOI: 10.1016/j.snb.2025.139000

Yuhang Du, Shihang Yan, Ya Wang, Ruojin Zhang, Mengmeng Xie, Hongyan Xu

{"title":"Direct growth of ZnO@ZIF-71 nanosheets on Al2O3 ceramic tubes for fabricating a highly selective and humidity-resistant NH3 sensor","authors":"Yuhang Du, Shihang Yan, Ya Wang, Ruojin Zhang, Mengmeng Xie, Hongyan Xu","doi":"10.1016/j.snb.2025.139000","DOIUrl":"https://doi.org/10.1016/j.snb.2025.139000","url":null,"abstract":"Ammonia detection is crucial for ensuring production safety, ecosystem protection, and human health. In this study, ZnO@ZIF-71 gas sensing elements were fabricated through a two-step hydrothermal method, demonstrating significantly enhanced NH3 selectivity compared to pristine ZnO. Stability evaluations demonstrated that the developed sensor exhibited excellent long-term stability and humidity resistance, ensuring reliable operation. A comprehensive characterization of the composites, including surface morphology, specific surface area, and surface chemical state, was systematically performed. The evaluation of the NH3 sensing performance showed that the incorporation of ZIF-71 significantly improved the NH3 sensing capability of the material. The ZIF-71 coating significantly increased the specific surface area and adsorbed oxygen species content of ZnO, thereby increasing the number of active sites on the material surface. These enhancements enabled the ZnO@ZIF-71 sensor to exhibit a high response (22.6 to 50 ppm) to NH3, excellent selectivity and a rapid response (34 s to 50 ppm). Density functional theory was used to analyze the characteristics of small molecule gases such as NH3, simulate the adsorption sites of NH3, and rationally explain the variation in sensitivity of the ZnO@ZIF-71 core-shell gas sensing material.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"58 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sine domain spectral transformation combined with Fourier transform: a UV-DOAS-based optical sensor-system for sub-ppb NH3 detection considering interference components 正弦域光谱变换与傅里叶变换相结合：一种考虑干扰分量的基于uv - doas的亚ppb NH3检测光学传感器系统

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-17 DOI: 10.1016/j.snb.2025.138997

Fei Xie, Changyin Li, Qi Tian, Bingqian Li, Xuye Dong, Wenbo Li, Shufeng Xu, Yungang Zhang

{"title":"Sine domain spectral transformation combined with Fourier transform: a UV-DOAS-based optical sensor-system for sub-ppb NH3 detection considering interference components","authors":"Fei Xie, Changyin Li, Qi Tian, Bingqian Li, Xuye Dong, Wenbo Li, Shufeng Xu, Yungang Zhang","doi":"10.1016/j.snb.2025.138997","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138997","url":null,"abstract":"The detection of trace ammonia (NH3) concentrations in breath gas is essential for facilitating noninvasive diagnosis of kidney disease. However, broadband absorption spectra methods, including ultraviolet differential optical absorption spectroscopy (UV-DOAS), often encounter challenges related to cross-sensitivity and noise interference for trace breath NH3 detection. Here, a UV-DOAS-based sensor that combines sine domain spectral transformation and Fourier Transform (FT) is proposed to enable trace NH3 detection in complex breath environments. First, the differential absorption spectra of NH3 were obtained by UV-DOAS, and the influence of breath components on the spectra of NH3 was analyzed. Second, sine domain spectral transformation was proposed to enhance the NH3 features by mapping the absorption characteristics to the sine domain while attenuating interfering components and noise. FT is then introduced to improve the selectivity of NH3. Laboratory results demonstrate that the sensor can detect trace NH3 accurately under interfering components, with a detection range from 26.58 ppb to 1955.78 ppb. And the Allan variance analysis indicates that the minimum detection limit of the sensor is 0.26 ppb, which is among the best results in this band. In addition, a real human breath experiment was conducted, and the results indicate that the sensor can effectively detect trace NH3 in breath, demonstrating excellent reproducibility and stability. The performance of the proposed sensor demonstrates that combining sine domain spectral transformation with FT can effectively improve the detection accuracy and break the limitations of spectral overlapping, providing a novel insight for broadband spectra development.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"22 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A high-performance fluorescence BTEX sensor: film device optimization and optical unit design 高性能荧光BTEX传感器：薄膜器件优化与光学单元设计

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-17 DOI: 10.1016/j.snb.2025.138996

Zhouyu Chen, Leyi Tang, Jiancheng Zhou, Ruijuan Wen, Jianfei Ma, Chi Zhang, Helan Zhang, Zhi-Hao Zhao, Yanyan Luo, Yu Fang

{"title":"A high-performance fluorescence BTEX sensor: film device optimization and optical unit design","authors":"Zhouyu Chen, Leyi Tang, Jiancheng Zhou, Ruijuan Wen, Jianfei Ma, Chi Zhang, Helan Zhang, Zhi-Hao Zhao, Yanyan Luo, Yu Fang","doi":"10.1016/j.snb.2025.138996","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138996","url":null,"abstract":"BTEX (benzene, toluene, ethylbenzene, and xylenes) are highly volatile and carcinogenic, making their on-site and real-time monitoring critical. Existing techniques, however, are hard to simultaneously achieve ppb-level sensitivity, rapid response, and long-term stability. To address this challenge, we developed a high-performance film-based fluorescence sensor using a highly fluorescent perylene bisimide derivative (P-PBI) as the sensing material. Through P-PBI-based film device optimization and improved optical unit design, our sensor achieves a significantly enhanced signal-to-noise ratio (SNR), enabling ultrahigh sensitivity (benzene: 8.6 ppb; toluene: 2.3 ppb; ethylbenzene: 1.9 ppb; o-xylene: 1.2 ppb; m-xylene: 2.0 ppb; p-xylene: 1.3 ppb), fast response (<4 s), and rapid recovery (<10 s). In addition, our sensor also demonstrates exceptional robustness, maintaining stability over eight months and enduring 1,000 fatigue cycles tests—outperforming flame ionization detectors (FID) generally coupled with gas chromatography (GC) and portable photoionization detectors (PID). Field tests in gas stations, adhesive workshops, and public smoking areas further validated the sensor’s reliability in real-world scenarios. This work provides a convenient solution for on-site and real-time BTEX monitoring, with significant implications for improving occupational and environmental safety.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"41 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eco-friendly molecularly imprinted sensor interface using chitosan-gold nanoparticle composite for sensitive and selective trace-level detection of PFOS 利用壳聚糖-金纳米颗粒复合材料的生态友好型分子印迹传感器界面对痕量全氟辛烷磺酸进行敏感和选择性检测

IF 3.7 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-16 DOI: 10.1016/j.snb.2025.138995

Pouya Borjian, Mohammadreza Chimerad, Hyoung J. Cho

{"title":"Eco-friendly molecularly imprinted sensor interface using chitosan-gold nanoparticle composite for sensitive and selective trace-level detection of PFOS","authors":"Pouya Borjian, Mohammadreza Chimerad, Hyoung J. Cho","doi":"10.1016/j.snb.2025.138995","DOIUrl":"10.1016/j.snb.2025.138995","url":null,"abstract":"<div><div>A composite layer of chitosan–gold nanoparticles (chitosan-AuNPs) was developed as a molecularly imprinted sensor interface for ultrasensitive and selective detection of perfluorooctane sulfonate (PFOS). While preserving known advantages of biodegradable, eco-friendly characteristics of biopolymer, technical challenges associated with the limited charge transfer and shape deformation in aquatic environments that impede the advancement of molecular imprinted chitosan-based PFOS sensors were addressed by this work. Incorporating AuNPs with an optimized cross-linking strategy overcame the inherent limitations of chitosan, including poor charge transfer and instability of imprinted cavities in aqueous media, thereby enhancing electrochemical performance and imprinting quality. The resulting sensor, fabricated on a screen-printed carbon electrode, achieved a detection limit of 1.07 ppt, which is well below the United States Environmental Protection Agency (EPA) guideline of 4 ppt for PFOS in drinking water. It exhibited strong affinity and selectivity toward PFOS, effectively discriminating it from structurally related PFAS and common ions. The adsorption behavior followed the Langmuir isotherm, indicating homogeneously distributed binding sites with strong binding affinity. Importantly, the sensor demonstrated excellent recovery and reproducibility in real water samples, confirming its practical applicability. These results underscore the efficacy and practical applicability of the eco-friendly chitosan-AuNP MIP sensing platform for the detection and monitoring of PFOS contamination in aquatic environments.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138995"},"PeriodicalIF":3.7,"publicationDate":"2025-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145306057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly sensitive ethyl acetate sensor based on porous Pd-decorated SnO2 nanofibers with In doping and In2O3 phases 基于In掺杂和In2O3相的多孔pd修饰SnO2纳米纤维的高灵敏度乙酸乙酯传感器

IF 8.4 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-15 DOI: 10.1016/j.snb.2025.138993

Xiaoya Xie, Long Chen, Zihao Liu, Yanhua Song, Bangjie Zhou, Yangfan Shen, Fang Zhou, Yanxin Wang, Yi Li, Xing Chen

{"title":"Highly sensitive ethyl acetate sensor based on porous Pd-decorated SnO2 nanofibers with In doping and In2O3 phases","authors":"Xiaoya Xie, Long Chen, Zihao Liu, Yanhua Song, Bangjie Zhou, Yangfan Shen, Fang Zhou, Yanxin Wang, Yi Li, Xing Chen","doi":"10.1016/j.snb.2025.138993","DOIUrl":"https://doi.org/10.1016/j.snb.2025.138993","url":null,"abstract":"In this study, we successfully synthesized SnO2 nanofibers with a hollow structure incorporating Pd and In, via a straightforward electrospinning and annealing process. These nanofibers exhibit enhanced gas sensing properties towards ethyl acetate. The structure and morphology of the materials were characterized by XRD, SEM, TEM, XPS and BET. The optimized 3% Pd-In2O3-SnO2 sensor demonstrates a high response value of 163.8 for 50 ppm ethyl acetate, which is 5.5 times higher than the response of pure SnO2. It also shows excellent selectivity, a low detection limit of 100 ppb, and maintains good long-term stability and reproducibility at an operating temperature of 190°C. In addition, an integrated mechanism is proposed to explain the excellent performance of the sensor, supported by DFT simulations, which is attributed to the effects of the addition of Pd and In, heterojunction formation, and hierarchical porous nanostructures. These factors collectively enhance gas adsorption and electron transfer.","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"215 1","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A La10Si5.5Al0.5O27-δ based mixed-potential H2 sensor using Au-CeO2 composite sensing electrode 基于Au-CeO2复合传感电极的La10Si5.5Al0.5O27-δ混合电位H2传感器

IF 3.7 1区化学

Sensors and Actuators B: Chemical Pub Date : 2025-10-15 DOI: 10.1016/j.snb.2025.138992

Shaozhe Sun , Weiwei Meng , Honghao Liu , Yongguang Liu , Jing Zhu , Yuehua Li , Zhangxing He , Lei Dai , Ling Wang

{"title":"A La10Si5.5Al0.5O27-δ based mixed-potential H2 sensor using Au-CeO2 composite sensing electrode","authors":"Shaozhe Sun , Weiwei Meng , Honghao Liu , Yongguang Liu , Jing Zhu , Yuehua Li , Zhangxing He , Lei Dai , Ling Wang","doi":"10.1016/j.snb.2025.138992","DOIUrl":"10.1016/j.snb.2025.138992","url":null,"abstract":"<div><div>Herein, a high-temperature applicable hydrogen sensor was prepared using a highly catalytically active Au-CeO2 composite as a sensing electrode loaded on La10Si5.5Al0.5O27-δ electrolyte (LSAO). The CeO2 addition hinders the sintering of Au and leads to forming the porous three-dimensional structure of the sensing electrode. Moreover, CeO2 oxygen ion conduction enlarges the electrode reaction active sites, which improves the response performance of the sensor. Among all sensors, the sensor based on Au-40 wt% CeO2 sensing electrode exhibits the largest response value and the highest sensitivity (-86.20 mV/decade) in 50–2000 ppm H2 at 450°C. The Pt reference electrode covered by porous LSAO coating enhances the sensor sensitivity and shortens response and recovery time. When 50 ppm NO, 50 ppm NO2, 1000 ppm CO or 2000 ppm CH4, was introduced to test gas containing 500 ppm H2, the response value change rate is + 0.35 %, −1.34 %, + 0.04 % and −0.61 %, respectively, showing that the sensor has excellent anti-interference for those interfering gases. The humidity and CO2 have a greater effect on the sensor response, and 40 % humidity or 24 % CO2 coexisting with 500 ppm H2 causes the response decreases by −19.25 % or −8.89 %. However, it should be noticed that the sensor response signal has a little change over a wide concentration range of humidity or CO2 (3–40 vol% humidity or 3–24 % CO2). In addition, the sensor also shows good stability and reproducibility. The mixed potential mechanism of the sensor is verified using Tafel and polarization methods.</div></div>","PeriodicalId":425,"journal":{"name":"Sensors and Actuators B: Chemical","volume":"448 ","pages":"Article 138992"},"PeriodicalIF":3.7,"publicationDate":"2025-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145288917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0