PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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2024
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IF 2.9
Zijie Su,Zhihua Zhao,Guixin Jin,Wei Chen,Xiaoqing Shen,Lan Wu
The focus of this work is to develop a sensitive and reliable acetone gas sensor using the Pt-modified Co 3 O 4 /CoMoO 4 heterojunction derived from metal-organic frameworks (MOFs). Pt-loaded Co 3 O 4 /CoMoO 4 heterojunction was successfully prepared by the surface redox method, and the composites exhibited high sensitivity and selectivity for acetone with a low detection limit. By modifying the Co 3 O 4 /CoMoO 4 material with platinum loading, the sensor achieved a response of 24.12 to 20 ppm acetone, which was significantly better than that of the pure Co 3 O 4 /CoMoO 4 heterojunction. This work not only improves acetone detection strategies, but also enhances the potential for industrial and medical VOC monitoring applications.
研究领域:
材料科学
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传感技术
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医学检测
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yi Luo,Jianfeng Li,Juanxia He,Xuling Song,Bei Xu,Zhijun Zhang,Jiamin Zhao,Yuxin Xie,Yaqi Zhang,Zhengfeng Wang,Baijun Shang,Minxin Zhou,Shuangxi Nie,Shuangfei Wang,Qingshan Duan
Ammonia (NH 3 ) detection is crucial to ensure health safety and food quality. Real-time NH 3 detection in food circulation faces challenges such as low sensitivity and instability under different conditions. This study proposes an integrated NH 3 sensor based on triboelectric nanogenerators, in which the NH 3 -sensitive triboelectric material is formed by is in situ grown of polyaniline (PANI) on a SnO 2 -doped balsa scaffold. The balsa scaffold/PANI/SnO 2 sensor demonstrates excellent stability under wide operating range (25 %–99 % RH, −20 to 20 °C) and can detect NH 3 in real-time. The conductive network formed by the in-situ growth of PANI significantly enhances the electrical output performance. Thanks to the large specific surface area of the porous structure of natural balsa scaffold and gas-sensing enhancement of PANI/ SnO 2 heterojunction, the composite exhibits a strong NH 3 response and a low detection limit. The sensor shows a 41.5 % response at 100 ppm NH 3 concentration, a 30 % improvement compared to that of the balsa scaffold/PANI sensor, and a minimal detection limit of 5 ppm. Additionally, the triboelectric gas sensor as a wireless sensing terminal in smart devices successfully detects the food spoilage process in real-time to the user interface. This study introduces a novel approach for developing natural wood-based gas sensors, highlighting their potential in real-time food quality monitoring.
研究领域:
材料科学
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传感器技术
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食品安全
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产品关联
DOI
高影响因子
Analysis & Sensing
·
2024
·
IF 3.4
Yifeng Xu,Haixia Mei,Yu Bing,Fuyun Zhang,Ning Sui,Tingting Zhou,Xiaopeng Fan,Lijie Wang,Tong Zhang
Graphical In this article, a Sm−Pd bimetal doped SnO 2 -based MEMS C 2 H 2 sensor was prepared for detecting dissolved acetylene gas in transformer oil. It has the unique advantages of high sensitivity, high selectivity and low power consumption. Acetylene (C 2 H 2 ), as an important characteristic gas in transformer fault diagnosis, should be accurately detected and effectively distinguished from other dissolved gases (H 2 , CH 4 , C 2 H 6 , C 2 H 4 , CO, CO 2 ), which is crucial to determine whether the fault occurs and the fault type, but also faces challenges now. The rational design and employment of rare earth and noble metals are expected to address this issue. In this work, SnO 2 -3 at% Sm 2 O 3 -1 at% PdO based MEMS gas sensor was prepared to achieve high performance detection of C 2 H 2 which has a response value of 56 to 50 ppm C 2 H 2 , response/recovery time of 2 s/136 s, lower detection limit of 1 ppm, power consumption of 15.5 mW, and weak cross sensitivity to other transformer fault characteristic gases. Lewis acids and bases theory was used to explain the reason why rare earth Sm is a benefit element to improve selectivity to C 2 H 2 . The formation of oxygen vacancies and hetero junctions was used to explain the increased sensitivity of the material. This study proved the feasibility of rare earth and noble metals as potential additives to enable advanced gas-sensitive materials for highly selective transformer fault characteristic gas C 2 H 2 detection.
研究领域:
材料科学
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传感器技术
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电力设备监测
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2017
·
IF 0.795
Fu-Xing XU,Qian-Kun DANG,Hang-Yu DING,Zheng-Xu HUANG,Yuan-Yuan WANG,Zhen ZHOU,Chuan-Fan DING
Ion trap performances were investigated based on digital ion trap technology with different collision gases and their pressures. Collision gases of helium ( M = 4 amu), nitrogen ( M = 28 amu) and argon ( M = 40 amu) with various pressures were adopted in ion excitation and dissociation stages for comparing the ion trap performances, including mass resolution, signal intensity, analysis ability of tandem mass spectrometric and low-mass cut off (LMCO) effect. The results indicated that when argon was used, the kinetic energy could be efficiently transferred and the LMCO effect was improved with higher ion capture and dissociation efficiencies except lower mass resolution. Higher mass resolution was realized with helium as collision gas. Furthermore, at the same gas pressure, heavier gas was beneficial to abundant fragment ions and structural information of precursor ion.
研究领域:
分析化学
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质谱技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
JiaYun Guo,ShuYi Ma,NiNa Ma,JiMing Liu,JinSha Wei,ChengYu Xu,GeGe Fan,Ping Ni
N-butanol, a volatile organic compound prevalent in numerous industrial processes, poses significant risks to human health and the environment if not properly monitored. Consequently, the development of high-sensitivity n-butanol sensors is imperative. For this reason, NdFeO 3 nanoparticles were successfully synthesized by hydrothermal method and used for the detection of n-butanol. They were fully analyzed using characterization techniques such as XRD, BET, EDX, SEM, TEM and XPS. The test results revealed that the prepared samples exhibited a granular structure with an average diameter of approximately 65 nm. The specific surface area measured 15.415 m 2 /g, and the pore size was determined to be 16.638 nm. The NdFeO 3 sensor responds up to 441 for 100 ppm n-butanol at 260 °C, response and recovery times were 33 s and 7 s respectively. The response value of the NdFeO 3 sensor is still 4.3 for 1 ppm n-butanol with a minimum detection limit of 0.024 ppm. Simultaneously, the NdFeO 3 sensor has excellent selectivity, stability and moisture resistance. These good sensing properties indicate that this work provides a possible strategy for developing an economical and repeatable high performance gas sensor for the detection of n-butanol.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xin Li,Yunzhuo Zhang,Yue Cheng,Xujun Chen,Wenhu Tan
Metal-organic framework (MOF)-derived ZnCo 2 O 4 was synthesized by utilizing the template agent 2-methylimidazole, zinc and cobalt nitrate by an easy solvothermal process followed by annealing for the first time. The porous hierarchical ZnCo 2 O 4 microstructure possesses a microflower structure assembled by 3D nanosheets . The obtained flower-like structure has abundant open spaces between nanosheets , which allows for facile gas diffusion while providing plentiful active sites for gas adsorption . The hierarchical ZnCo 2 O 4 microflower-based sensor exhibits a high response of 32.32 and fast response/recovery rates (2.6/8.8 s) at 200 °C to 100 ppm acetone gas. In addition, the porous hierarchical ZnCo 2 O 4 microflower-based sensor has a detection limit below 50 ppb with a response of 2.51 to acetone gas. The excellent sensing performance of this porous hierarchical structure-based sensor is ascribed to the good gas accessibility of the microflower morphology with a high specific surface area, small particle size and highly porous structure . This work explores an efficient way to synthesize MOF-derived bimetallic oxides with microflower structures assembled by 3D nanosheets for gas sensing applications.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Yang Lu,Jiafeng Zhang,Wei Wang,Yizhuo Fan,Caixia Liu,Jingran Zhou,Dali Liu,Shengping Ruan
Two-dimensional metal sulfide semiconductor materials have received a lot of attention recently due to their large surface-to-volume ratio, outstanding chemical properties, and suitable band gap, and possess the potential in the application of gas sensors. In this work, SnS 2 nanosheets were synthesized by a simple hydrothermal method and successfully modified with Au, Pd, and Au-Pd nanoparticles on their surfaces using reducing agents for xylene detection. The experimental results show that the gas-sensitive performance of the sensor can be significantly improved by modifying Au-Pd nanoparticles on the surface of SnS 2 nanosheets , which can be attributed to the synergistic effect of the bimetal and the catalytic properties of bimetallic systems. The response of the prepared sensor is more than ten times higher than that of the pure material. In addition, the optimal operating temperature of the sensor modified by Au-Pd nanoparticles was also decreased compared to that of the sensor prepared by SnS 2 . The outstanding performance makes Au-Pd nanoparticles-modified SnS 2 gas sensor a great potential candidate for xylene detection.
研究领域:
材料科学
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传感器技术
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化学
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DOI
高影响因子
Research
·
2022
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IF 11.036
Yongfa Cheng,Li Li,Zunyu Liu,Shuwen Yan,Feng Cheng,Yang Yue,Shuangfeng Jia,Jianbo Wang,Yihua Gao,Luying Li
The development of smart wearable electronic devices puts forward higher requirements for future flexible electronics. The design of highly sensitive and high-performance flexible pressure sensors plays an important role in promoting the development of flexible electronic devices. Recently, MXenes with excellent properties have shown great potential in the field of flexible electronics. However, the easy-stacking inclination of nanomaterials limits the development of their excellent properties and the performance improvement of related pressure sensors. Traditional methods for constructing 3D porous structures have the disadvantages of complexity, long period, and difficulty of scalability. Here, the gas foaming strategy is adopted to rapidly construct 3D porous MXene aerogels. Combining the excellent surface properties of MXenes with the porous structure of aerogel, the prepared MXene aerogels are successfully used in high-performance multifunctional flexible pressure sensors with high sensitivity (306 kPa -1), wide detection range (2.3 Pa to 87.3 kPa), fast response time (35 ms), and ultrastability (>20,000 cycles), as well as self-healing, waterproof, cold-resistant, and heat-resistant capabilities. MXene aerogel pressure sensors show great potential in harsh environment detection, behavior monitoring, equipment recovery, pressure array identification, remote monitoring, and human-computer interaction applications.
研究领域:
材料科学
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电子工程
·
传感器技术
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DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2020
·Vol. 15
·期 4
·e2456
·
IF 1.06
Peng Liu,Yue Wang,Zhengzhong Zhou,Haoran Yuan,Tao Zheng
Pyrolysis gas release behaviour, including hydrogen, CH 4 , CO and CO 2 from pine pyrolysis, is collected from fixed bed reactor and analyzed by gas chromatography (GC). Pyrolysis tar composition is monitored using GC coupled with a mass spectrometer (GC–MS). The gas generation mechanism of catalytic pyrolysis on alumina is elaborated. The carbon structure of char is quantitatively determined by carbon-13 nuclear magnetic resonance ( 13 C-NMR) using curve-fitting methods. The results show influence of alumina on gas fuel production is mainly embodied in absorption and catalytic effect. Steam reforming reaction to gas fuel is accelerated with alumina added during pine pyrolysis. Alumina addition accelerates the decomposition of carbonate and side chains of aromatic ring in lignin below 500°C and prolong the residence time of second pyrolysis. The CH 4 release rate reaches to peak value at 500°C during pyrolysis. The H 2 increases from 98.95 to 120.19 ml/g with mass ratio of 1/4 (alumina/pine). The CO release rate has a certain increment with the alumina added. These data are the foundation for putting forward a new direction for the reuse of organic and industrial solid wastes enriched with alumina to achieve the goal on energy regeneration.
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Lining Yu,Jun He,Meiling Qi,Xuebin Huang
This work reports a new type of triptycene-based amphiphilic stationary phase (TP-2IL) for gas chromatography (GC). It is an integration of the 3D π-rich triptycene framework with ionic liquids. Its capillary column showed the efficiency of 3880 plates/m determined by n -dodecane at 120 °C (k = 2.79) and exhibited good performance for analytes from apolar to polar nature. Particularly, it has outstanding capability for resolving critical pairs of anilines and phenols with good peak shapes and shows distinct advantages over its composing counterparts (TP-2BO and O-IL) and widely-used commercial columns, namely 35% phenyl methyl polysiloxane (DB-35) and polyethylene glycol (INNOWAX). Moreover, the TP-2IL column exhibited good repeatability and reproducibility with the values of relative standard deviation in the range of 0.02%–0.07% for run-to-run, 0.10%–0.35% for day-to-day and 2.9%–5.1% for column-to-column, respectively, and good thermal stability up to 300 °C. Furthermore, its applications for determining isomer impurities in real samples demonstrate its feasibility for practical GC analysis. This work presents a facile strategy for constructing triptycene-based stationary phases with amphiphilic selectivity and provides alternatives of highly selective stationary phases for chromatographic analysis.
研究领域:
分析化学
·
材料科学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2017
·
IF 7.504
Danke Chen,Wen Ying,Yi Guo,Yulong Ying,Xinsheng Peng
Two-dimensional (2D) materials-based membranes show great potential for gas separation. Herein an ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), was confined in the 2D channels of MoS2-laminated membranes via an infiltration process. Compared with the corresponding bulk [BMIM][BF4], nanoconfined [BMIM][BF4] shows an obvious incremental increase in freezing point and a shift of vibration bands. The resulting MoS2-supported ionic liquid membrane (MoS2 SILM) exhibits excellent CO2 separation performance with high CO2 permeance (47.88 GPU) and superb selectivity for CO2/N2 (131.42), CO2/CH4 (43.52), and CO2/H2 (14.95), which is much better than that of neat [BMIM][BF4] and [BMIM][BF4]-based membranes. The outstanding performance of MoS2 SILMs is attributed to the nanoconfined [BMIM][BF4], which enables fast transport of CO2. Long-term operation also reveals the durability and stability of the prepared MoS2 SILMs. The method of confining ILs in the 2D nanochannels of 2D materials may pave a new way for CO2 capture and separation.
研究领域:
材料科学
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化学工程
·
环境科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Yaqi Zhang,Minfeng Wu,Yile Wang,Xiang Chen,Meiqi Wang,Feng Chen,Wentao Cao,Shengcai Qi
Maxillofacial electromyographic (EMG) signals serve as crucial indirect indicators of occlusal function, playing a significant role in clinical oral diagnosis. However, conventional gel electrodes with occlusive nature induce skin irritation and wearer discomfort, which limits long-term monitoring. Here, we developed an ultrathin, gas-permeable, and flexible electronic skin (e-skin) designed for imperceptible, long-term maxillofacial EMG monitoring. This e-skin comprises a stretchable substrate formed by core–shell elastic fibers fabricated via coaxial electrospinning, coated with PEDOT:PSS@MXene nanocomposite layers. The cross-linking effect between PEDOT:PSS and MXene (specifically, the hydrogen bonding between MXene and PSS chains and the electrostatic interaction between MXene and PEDOT chains) reduces the interlayer spacing, concurrently delaying MXene oxidation by repelling water and air and enhancing electron transfer between MXene layers. In sEMG measurement trials, the e-skin successfully acquired clear, stable myoelectric signals corresponding to various chewing intensities and patterns (e.g., gum chewing and intermittent occlusion). In particular, ultrathin dimensionality substantially diminishes foreign body perceptibility and associated wearer discomfort, thereby elevating sustained comfort thresholds and long-term therapeutic viability. This work presents a novel material-device strategy for next-generation wearable bioelectric sensing platforms, enabling comfortable, precise monitoring with applications in facial muscle assessment, rehabilitation medicine, and neuromuscular diagnostics.
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产品关联
DOI
PubMed
高影响因子
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