IEEE SENSORS JOURNAL
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2025
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IF 4.5
Wendi Zhu,Xuhan Wang,Wei Gao
The continuous increase in industrial exhaust emissions has led to rising atmospheric hydrogen sulfide (H2S) concentrations, posing significant threats to both environmental safety and human health. In this study, four morphologically distinct Fe2O3-based gas sensors were synthesized via different surfactantassisted hydrothermal method, among which the nanorod-structured Fe2O3 exhibited optimal sensing properties. Loading CuO into this form of iron oxide sensing material to construct p-n heterojunctions, with systematic investigation of the influence of varying CuO loading concentrations on sensor performance. Systematic investigation revealed that CuO modification significantly improved the sensor response characteristics. The optimized sensor with 15 wt% CuO loading demonstrated exceptional performance, exhibiting an ultrahigh response value of 1780 toward 100 ppm H2S at the operating temperature of 125°C, along with a rapid response time of 9 s. It provides a reasonable idea for the design of highly responsive hydrogen sulfide sensors.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yujuan Hu,Kelin Hu,Jing Zhang,Yuxiao Jiang,Tao He,Yu He,Rujing Yan
This paper presents a hydrogen sensor made of WSe 2 modified monocrystalline SnSe 2 nanolayer . The hydrogen sensitive property of tungsten diselenide (WSe 2 ) and tin diselenide (SnSe 2 ) was found by hydrothermal adjustment of the molar ratio . The samples were characterized for their crystal structure, microstructure, morphology, and elemental composition , and the morphology and heterojunction formation of the nanocomposites were confirmed. When the optimal molar ratio is 1:1 and the optimal working temperature is 270 °C, the WSe 2 /SnSe 2 sensor have good sensing properties for hydrogen, and the sensitivity for 100 ppm hydrogen is about 7.27. Finally, the experiment proves that WSe 2 /SnSe 2 gas sensor has a unique selection of hydrogen and has a wide application prospect in hydrogen detection in the future. The gas sensing mechanism of the hydrogen sensor is discussed based on its material structure .
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Xiaoning Meng,Mingshu Bi,Qiuping Xiao,Wei Gao
With the emergence of hydrogen economy worldwide and the increase of safety problems caused by the highly flammable and explosive characteristics of hydrogen (H 2 ), it is urgent to develop the portable sensors that can sensitively and quickly detect H 2 leaks. In this work, the H 2 sensing characteristics of Pd/SnS 2 /SnO 2 nanocomposites synthesized via hydrothermal route as well as impregnation route were systematically investigated for the first time. The influence of different SnS 2 and Pd loading on the H 2 sensing performances of SnO 2 nanoparticles was revealed by varying the addition levels of thiourea and palladium chloride. The H 2 sensing experimental results demonstrated that SnS 2 and Pd modification can greatly enhance the sensing capabilities of SnO 2 , where 1.0 at% Pd/SnS 2 /SnO 2 sensor exhibited high response (95) and rapid response/recovery time (1/9 s) to 500 ppm H 2 at 300 ℃, thus outperforming the current reported sensing performances of SnO 2 -based H 2 sensors. The superior sensing characteristics of Pd/SnS 2 /SnO 2 were attributed to the simultaneous synergistic effect of the three components. This study will supply a rational strategy for designing high sensitive and rapid response H 2 sensors.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Wenxin Liu,Jiabin Zou,Shuni Li,Jinkun Li,Feihu Li,Zili Zhan,Yeguang Zhang
Hydrogen sensors are easily deactivated by hexamethyldisiloxane (HMDSO) poisoning. Moreover, the existing anti-poisoning strategies can also damage the overall sensing performance of these hydrogen sensors. Therefore, a new bilayer design with a Pd/In 2 O 3 sensitive layer and an In 2 O 3 /Al 2 O 3 catalytic filter layer is proposed to avoid the deactivation of hydrogen sensors. The In 2 O 3 /Al 2 O 3 layer helps in hindering HMDSO and its decomposition products from reaching the Pd/In 2 O 3 layer. The H 2 response of the sensors is enhanced due to the small size of In 2 O 3 and the electronic sensitization of Pd. As a result, the bilayer sensors exhibit high response (Ra/Rg = 53) and ultra-fast response time (1 s) towards 3000 ppm H 2 at 365 °C. The resistance and the H 2 response of the bilayer sensors are almost unchanged after 40 min of 10 ppm HDMSO poisoning. In this paper, the mechanism of resistance against silicone poisoning and the H 2 response of the bilayer sensors are discussed from the separation of sensing and catalytic filtration reactions to the behavior of adsorbed oxygen.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Gongao Jiao,Peilin Jia,Yong Zhang,Hao Zhang,Jieshuo Zhai,Zuozhe Ding,Dongzhi Zhang
In this work, Fe 2 O 3 nanoparticles were synthesized through a simple hydrothermal method, and a high-performance Fe 2 O 3 -In 2 O 3 heterojunction hydrogen sensor was successfully fabricated via electrospinning. The morphology and elemental composition of the composite material were characterized through scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. A systematic performance test of the sensor was conducted using an experimental testing platform. The optimal doping ratio of Fe 2 O 3 was explored, and the sensor's optimal operating temperature was found to be 280°C. At this temperature, the sensor exhibited a response of 32.95 to 2000 ppm hydrogen, which is 7.6 times higher than that of the pristine In 2 O 3 , along with rapid response/recovery times (1.5 s/16 s), rosy selectivity, and stability. The improved sensor performance can be primarily ascribed to the creation of the heterojunction and the expanded specific surface area of the materials. The adsorption energy, charge transfer, and other properties of the Fe 2 O 3 -In 2 O 3 composite were calculated using density functional theory, further elucidating the reasons for the improvement in sensor performance.
研究领域:
材料科学
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传感器技术
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Qiaoling Xing,Xujie Chen,Yong Cai,Ming Zhang
As a kind of green energy, hydrogen (H 2 ) has been widely concerned and applied by people. One of the biggest challenges for sensing applications is the quick detection of hydrogen leaks or their release in various conditions, particularly in large electric vehicle batteries. This study successfully constructed a quick response and recovery hydrogen sensor based on the In 2 O 3 -SnO 2 heterojunction. The response and recovery time of the In 2 O 3 -SnO 2 hydrogen sensor is 1.1/1.9 s to 50 ppm H 2 . This is reduced to 11.0 %/9.5 % compared to the SnO 2 hydrogen sensor. This sensor's remarkable gas detecting properties are mainly attributed to the In 2 O 3 -SnO 2 heterojunction creation, crystal structure modification, and increased specific surface area (92.9 m 2 /g). Homogenous In 2 O 3 -SnO 2 nanocomposites contain more oxygen defects, which is the primary factor enhancing the sensor's ability to detect gases. Firstly, indium ions are incorporated in the lattice of SnO 2 results in lattice distortion and enhances the presence of oxygen deficiency in the composites, which plays a pivotal role in achieving rapid response and recovery of the sensor. Secondly, In 2 O 3 -SnO 2 heterostructures promote rapid adsorption of oxygen molecules and target gases by facilitating effective electron mobility on their surface. The quicker response and recovery times of hydrogen sensors based on In 2 O 3 -SnO 2 heterojunctions are observed. This innovative approach to creating fast-responding gas sensors highlights the promise of heterojunction-based hydrogen sensors for real-time H 2 monitoring and opens up new research directions.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 9
·2123
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IF 3.623
Ming Liu,Caochuang Wang,Pengcheng Li,Liang Cheng,Yongming Hu,Yao Xiong,Shishang Guo,Haoshuang Gu,Wanping Chen
Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xuping Li,Yanwei Li,Xingtang Xu,Xiaohua Wang,Guang Sun,Bo Zhang,Yan Wang,Jianliang Cao
Metal oxide semiconductor (MOS)-based hydrogen (H 2 ) sensor that can work at room or near room temperature has attracted an increasing concern owing to its potential application in hydrogen storage and utilization. Herein, a co-sensitization strategy by La doping and Pd decoration is proposed to realize the detection of H 2 at near room temperature (50 °C) on In 2 O 3 porous nanotubes (PNTs). The In 2 O 3 PNTs were prepared via a solvothermal method and then sequentially doped with La 3+ and decorated with Pd nanoparticles via an immersion, freeze-drying and calcination route and a chemical reduction method, respectively. The results of gas-sensing measurements indicated that after a compositional evolution from In 2 O 3 to La-doped In 2 O 3 (La-In 2 O 3 ) and Pd-decorated La-In 2 O 3 (Pd/La-In 2 O 3 ), the fabricated H 2 sensor showed a higher sensitivity at lower operating temperature. At a near room temperature of 50 °C, the response of the best Pd/La-In 2 O 3 sensor to 50 ppm H 2 was as high as 8.34, increasing about 4.85, 1.20 and 1.15 folds compared to the In 2 O 3 (1.72 at 160 °C), La-In 2 O 3 (6.97 at 150 °C) and Pd/In 2 O 3 (7.24 at 80 °C) sensors, respectively. The sensitization effects and mechanism of La dopant and Pd modifier as well as their synergistic effects were discussed in detail.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xinyue Li,Hongjing Fei,Yanlin Zhang,Zheng Zhang,Huakang Zong,Bo Liu,Guotao Duan,Yuanyuan Luo
The detection of low-concentration hydrogen at room temperature is still a challenge, which contributes to taking precautions as soon as possible when hydrogen leaks. In this study, we prepared Pt/SnO 2 -Pd nanomaterial as nanoelectrode applied for a fuel cell-type hydrogen sensor with zero power consumption . The sensing results show that such fuel cell-type H 2 gas sensor has high selectivity and good sensitivity to H 2 gas, with an unprecedented low detection limit of 1 ppm, and the humidity has little impact on the sensor's performance. Based on DFT calculations, the low adsorption energy and the electron transfer interaction between Pd and H promote the adsorption and dissociation processes of H 2 molecules, which lead to the hydrogen oxidation reaction acceleration and shorter times of response and recovery. In addition, this Pt/SnO 2 -Pd based sensor has also advantages of high selectivity and zero-power consumption, which may provide a broad application prospect for fuel cell vehicles and voltage transformers, etc.
研究领域:
材料科学
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纳米技术
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zijian Wang,Dongzhi Zhang,Mingcong Tang,Yajing Chen,Yuehang Sun,Qingdong Chen,Jingdu Bian,Xingyan Shao
Hydrogen (H 2 ) is considered one of the promising energy sources to replace fossil fuels so efficient H 2 sensing technology is a necessary condition to ensure the safety of people’s livelihood and economic development. In this paper, ZnO obtained by calcination of precursor ZIF-8 has a regular dodecahedral structure. The product of In 2 O 3 obtained with the participation of the surfactant PEO-PPO-PEO has two different crystal forms, namely cubic phase c-In 2 O 3 and hexagonal h-In 2 O 3 . Crystal form c-In 2 O 3 is 7.07 wt% of the mass of h-In 2 O 3 . When ZnO is 5 wt% of In 2 O 3 , the H 2 sensor based on the ZnO (5 %)-Inc/Inh composite material has the best response performance and the operating temperature is 450 °C. The sensor’s response time for detecting 5000 ppm H 2 is less than 1 s, and the recovery time is 6 s with a response intensity of 79.91. The limit of detection (LOD) is 53 ppb, which is much lower than the explosive concentration (4–75 V/V%). Density functional theory (DFT) is utilized for investigating the performance advantages of Inc/Inh composites over pure c-In 2 O 3 and h-In 2 O 3 and further elaborating the mechanism of ZnO improving the gas-sensing performance of ZnO (5 %)-Inc/Inh. The sensor based on ZnO (5 %)-Inc/Inh composite may guide the research of high-performance H 2 sensors. The H 2 adsorption mechanism of the sensor was analyzed based on the oxygen adsorption mechanism.
研究领域:
材料科学
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能源技术
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纳米科技
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Rui Yang,Jian Wu,Jaafar Abdul-Aziz Mehrez,Xue Liu,Yaozong Zhai,Xiao Li,Yuyang Wang,Jianhua Yang,Nantao Hu,Min Zeng,Hao Zhu,Zhi Yang
To address the energy crisis and mitigate greenhouse gas emissions, substantial investments are advancing hydrogen (H2) technologies. Reliable, efficient room-temperature H2 sensors are critical for ensuring safe H2 production and utilization. Here, we report a palladium/palladium oxide (Pd/PdO) nanosheet composite capable of detecting H2 concentrations as low as 0.5 ppm at room temperature. The sensor exhibits exceptional stability, maintaining this detection limit after four months under ambient conditions. The superior H2 sensing performance stems from two key features: (1) the ultrathin nanosheet morphology, which offers abundant reactive sites, and (2) Pd nanoregions that enhance chemical and electronic sensitization. Together, these attributes synergistically elevate room-temperature H2 detection. This work demonstrates a promising strategy for advancing H2 sensor performance, supporting the transition to a hydrogen-based economy.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yuxiao Jiang,Kelin Hu,Jing Zhang,Tao He,Bin Yu,Xinyuan Li,Jiarong Yang
This research focused on the synthesis of In 2 O 3 /Ni x O y nanocomposites utilizing the conventional template method. The resulting gas sensor, designed for H 2 detection, demonstrates a sensing behavior that is dependent on temperature. Various characterization techniques were employed to analyze the synthesized In 2 O 3 /NiO composite materials. The results obtained from tests conducted at different temperatures reveal that the sensor maintains a stable n-type response for H 2 at temperatures exceeding 240°C, while exhibiting an atypical p-type response at lower temperatures. This transition in adsorption behavior enables the In 2 O 3 /Ni x O y composites to function as a dual-mode sensor capable of detecting H 2 . The temperature-induced transformation is likely attributable to the interplay of several mechanisms. This article elucidates this phenomenon by examining factors such as activation energy, TGA/DSC, adsorbed oxygen, heterojunction formation, and humidity effects. This study contributes to the understanding of the transformation mechanisms underlying MOS gas sensing behavior.
研究领域:
材料科学
·
传感器技术
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）