Sensor Review
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2025
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IF 1.4
Zhaopeng Li,Pei Li,Peisi Yin,Xin Zhao,Yangting Hu,Fei Sun,Xia Sun,Zhenhe Wang
Purpose This paper aims to develop a highly sensitive resistive gas sensor for accurately detecting ethyl formate to achieve reliable and real-time monitoring of fish meal spoilage. Design/methodology/approach Based on the one-step solvothermal reduction method, in a specific triethylene glycol solution environment and high temperature, the 3D ZnO sensing material with a jackfruit-like structure was prepared for detecting ethyl formate gas in fish meal. Findings The gas sensor based on 3D ZnO displays high sensor response (69.68–100 ppm) at 280°C and 43% RH and good sensor response (12.18–100 ppm) at 280°C and 80% RH, ultra-low detection limit of 10 ppb at 43% RH, excellent selectivity, repeatability and long-term stability. The sensing mechanism is due to the gain or loss of electrons caused by the sensor surface reaction. The unique jackfruit-like structure, abundant oxygen vacancies and large surface area may be another factor contributing to its excellent ethyl formate gas sensing performance. Originality/value The authors first developed an ethyl formate gas sensor, and the results were compared with the previously published data. The analysis showed the ZnO gas sensor demonstrated excellent sensing performance. This work highlights the potential of high response ethyl formate gas sensors to accurately evaluate fish meal quality.
研究领域:
材料科学
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食品科学
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产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Yang Yang,Huanxi Zhou,Zicheng Zou,Xiangjun Yang,Haijun Du
In this paper, Vanadium doped CeO 2 microsphere were synthesized using a facile hydrothermal method, and three distinct molar ratios of Ce:V precursors (15:1, 11:1 and 7:1) were investigated. The as-prepared materials were then utilized for the sensitive detection of volatile organic compounds (VOCs), specifically acetone. Results show that the V doping leads to a significant improvement in acetone response compared to the pure CeO 2 sensor. Notably, the V-doped CeO 2 sensing material with the optimal ratio of 11:1 has the highest response value of ∼12 for 100 ppm acetone at a low working temperature of 230 °C. Additionally, this sensor exhibits fast response time (15 s) and recovery time (10 s). Moreover, the V-doped CeO 2 (11:1) sensor exhibits a broad concentration range of 0.5–500 ppm for acetone detection. This material also demonstrates great cycle stability, maintaining high stability over a 60-day testing period (RSD = 0.91 %). The as-prepared V-doped CeO 2 sensor exhibits excellent sensitivity, response and recovery time, and cycle stability, making it a promising candidate for practical applications in acetone sensing.
研究领域:
材料科学
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化学传感器
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
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IF 5.097
Meng Wu,Yipeng An,Ru Yang,Zhenhua Tao,Qixun Xia,Qianku Hu,Mian Li,Ke Chen,Zhanying Zhang,Qing Huang,Shu-hong Ma,Aiguo Zhou
In this paper, the performance and fundamental mechanisms on gas sensing of V2CTx and Ti3C2Tx MXenes were investigated. The MXenes nanosheets with the same chemical composition can show positive or negative response to the same gas due to the change of surface chemistry, which, in turn, is affected by the etching solution to make the samples. The residual Li or Na atoms on the surface of MXenes have a weak impact on the gas sensing performance; however, the ratio of Cl/F has a strong impact. V2CTx made in HF showed positive/zero response to the eight gases tested in this paper and had excellent sensing performance to methane. However, V2CTx made in LiF+HCl showed negative/zero response, while that made in NaF+HCl displayed positive response only to formaldehyde. Ti3C2Tx made in NaF+HCl showed a positive response to all detected gases while that made in ZnCl2 had better gas detection ability but showed a negative response to ammonia, triethylamine, and toluene. On the basis of the theoretical simulations, the structure-sensitive sensing behavior of MXenes as gas sensors is mainly ascribed to the structure-dependent electron transmission mechanism upon adsorbed gas molecule. This study is significant to the application of MXene sensors for designing specific gases.
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
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Fanpu Meng,Jinyong Hu,Can Liu,Yuming Tan,Yong Zhang
In this work, the gas sensors based on LnFeO 3 nanocrystallines with different lanthanide (Ln = Yb, Tm, and Er) are fabricated to investigate the effect of lanthanide on acetone sensing performances. The experimental results revealed that the gas sensor based on YbFeO 3 nanocrystallines exhibited the best response ability and selectivity toward acetone gas. The YbFeO 3 gas sensor exhibits rapid response/recovery characteristic (18/25 s, 10 ppm acetone), and the detection limit can reach to be 500 ppb. The enhanced gas-sensing performance of YbFeO 3 based sensor is mainly contributed to the lanthanide with low binding energy of the Ln O bond.
研究领域:
材料科学
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纳米技术
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传感器与执行器
✓ 已验证
DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 5
·810
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IF 2.7
Ruonan Tian,Huai Tan,Gang Chen,Hongtao Guan,Chengjun Dong,Zongyou Yin
Although individual γ-Fe2O3and α-Fe2O3have been widely fabricated for gas sensors, their mixed phase of α/γ-Fe2O3might deliver excellent sensing properties. In this study, a facile solvothermal method was used to fabricate Fe-alkoxide. After thermal treatment, it was converted into γ-Fe2O3, α-Fe2O3and their mixed-phase α/γ-Fe2O3with a nanosheets-assembled flower-like structure. We studied the influence of calcination temperature on the phase and sensing properties on acetone detection. The α/γ-Fe2O3which annealed at 400 °C included 18% α-Fe2O3and it exhibited excellent sensing performance towards acetone compared to that of γ-Fe2O3and α-Fe2O3. It showed a response of 353 to acetone with a concentration of 200 ppm, and a low limit of detection of 0.5 ppm at 160 °C. In addition, the change in responses with acetone concentration from 50 to 200 ppm shows a good linear relationship. Moreover, this material has good reproducibility and selectivity as well as a fast response time of 22 s and recovery time of 14 s to 200 ppm. Therefore, our mixed phase of α/γ-Fe2O3possesses great prospects for acetone detection.Keywords:Fe2O3;phase;gas sensor;acetone;sensing performance
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Feihu Li,Ziqiang Zhang,Junjie Jing,Qing Xue,Keyu Chen,Yeguang Zhang,Huibing Fu,Zili Zhan,Peng Wang
Development of highly sensitive ethanol gas sensors is critical for numerous applications including industrial gas leak monitoring, environmental air quality assessment, food fermentation process control, and automotive drunk driving prevention. Here, NiS hierarchical nano-microspheres (NiS-HNMs) were successfully synthesized via a facile hydrothermal method. The gas sensing performance toward ethanol was comprehensively evaluated by testing key parameters. The results demonstrate that the NiS-HNMs exhibit remarkable efficiency in ethanol detection. The gas sensor fabricated with NiS-HNMs achieves a response value of 4.33 toward 10 ppm ethanol at 130°C. Meanwhile, the gas sensor demonstrates excellent selectivity, short-term repeatability, and long-term stability for ethanol detection, along with an excellent linear relationship over the concentration range of 1–10 ppm. The superior gas sensing performance of the NiS-HNMs is attributed to their hierarchical nano-microsphere structure, with a large specific surface area (174.09 m 2 /g), providing abundant active sites. Additionally, a large amount of surface-adsorbed oxygen was detected on the surface of NiS-HNMs, which indicates that more adsorbed oxygen molecules participate in ethanol gas sensing reactions, thus contributing to their excellent gas sensing performance. In summary, this study successfully synthesized hierarchically structured NiS nano-microspheres, which provide a novel perspective for constructing high-performance ethanol sensors and show significant application potential in high-sensitivity detection fields.
研究领域:
材料科学
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化学传感器
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纳米技术
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气体传感应用
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
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2024
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IF 5.6
Huimin Yang,Yazhou Yang,Chaofan Ma,Qirui Wu,Jiahong Tang,Chaoqi Zhu,Xiaoxia Wang,Dawen Zeng
NO 2 is a hazardous gas extremely harmful to the ecosystem and human health, so effective detection of NO 2 is critical. SnSe 2 is a promising candidate for gas sensors owing to its unique layered configuration that facilitates the diffusion of gas molecules. Here, ultrathin self–assembled nanoflowers F–SnSe 2 rich in defects were synthesized by a simple solvothermal method. It exhibits excellent gas sensing performances for NO 2 at room temperature (25 °C), with a high gas sensing response of 8.6 for 1 ppm NO 2 and a lower detection limit as low as 200 ppb, capable of sensitively detecting ppb–level NO 2 . DFT calculations revealed that the presence of Se vacancies assists the central Sn atoms to break through the shielding effect of the surface Se atoms and become exposed active sites. The higher reactivity leads to more charge transfer and higher adsorption energy , which strongly promoted the adsorption of NO 2 . This work verifies the important role of vacancies for the exposed active sites and provides new guidance for defect engineering to modulate the gas sensing performances of SnSe 2 .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sensors
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2024
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IF 8.2
Jing Cao,Zixuan Zhang,Shuangming Wang,Zhiying Sun,Jiahao Li,Yao Wang,Xiaoxue Xu,Zhixu Ye,Haiming Zhang
The performance of semiconductor sensors is determined by reaction kinetics, conductivity, and electron mobility, which are undoubtedly closely related to the electron motion behavior. Therefore, the effective regulation of electronic states is crucial for improving gas sensing properties. Previous methods of enhancing the gas-sensing performance have induced complex material modifications, and the extent of performance improvement is usually very limited. Further optimization of the gas sensing performance requires continuous efforts to advance new technologies. Toward this issue, a novel magnetic field-induced strategy is adopted to boost the carrier transfer efficiency of nonferromagnetic semiconductors. The gas sensing investigation results manifest that the applied magnetic field can effectively enhance the sensitivity and reduce the baseline resistance. The In2O3 NC-2 (In2O3 nanocubes) with an applied magnetic field have a greatly enhanced response of 161.4 toward 100 ppm formaldehyde, which is 2.5 times higher than that without magnetic field. The enhanced gas sensing properties can be mainly attributed to magnetization of reactive materials, which makes the orientation of electronic magnetic moments consistent, thus greatly contributing to reactivity. This work introduces a practical approach to effectively improve gas sensing performance without further morphology optimization, noble metal catalysis, structural modification, and material cladding. The results of this study provide new insights for designing novel gas sensors to improve the gas sensing performance.
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
PubMed
高影响因子
SENSORS
·
2021
·Vol. 21
·期 24
·8269
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IF 3.576
Kai Sun,Guanghui Zhan,Hande Chen,Shiwei Lin
CeO2/ZnO-heterojunction-nanorod-array-based chemiresistive sensors were studied for their low-operating-temperature and gas-detecting characteristics. Arrays of CeO2/ZnO heterojunction nanorods were synthesized using anodic electrodeposition coating followed by hydrothermal treatment. The sensor based on this CeO2/ZnO heterojunction demonstrated a much higher sensitivity to NO2at a low operating temperature (120 °C) than the pure-ZnO-based sensor. Moreover, even at room temperature (RT, 25 °C) the CeO2/ZnO-heterojunction-based sensor responds linearly and rapidly to NO2. This sensor’s reaction to interfering gases was substantially less than that of NO2, suggesting exceptional selectivity. Experimental results revealed that the enhanced gas-sensing performance at the low operating temperature of the CeO2/ZnO heterojunction due to the built-in field formed after the construction of heterojunctions provides additional carriers for ZnO. Thanks to more carriers in the ZnO conduction band, more oxygen and target gases can be adsorbed. This explains the enhanced gas sensitivity of the CeO2/ZnO heterojunction at low operating temperatures.Keywords:gas sensor;NO2detection;heterojunction;low operating temperature;CeO2
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
Electronics
·
2025
·Vol. 14
·期 5
·1050
·
IF 2.6
Xiang Gao,Ying Chen,Pengcheng Xu,Dan Zheng,Xinxin Li
The selective detection of propane gas molecules using semiconductor gas sensors has always been a challenge within research. In this study, we successfully synthesized a γ-Fe2O3nanomaterial with a selective catalytic effect on propane and loaded it onto a ZnO sensing material to construct a double-layer microsensor, which showed good sensing response characteristics in the detection of the refrigerant R290 (which is mainly propane). In addition, we also prepared a series of iron oxides, including nanomaterials such as α-Fe2O3, Fe3O4, and FeO, as well as γ-Fe2O3materials with different specific surface areas obtained at various processing temperatures, and we carried out gas sensing research on R290. The results show that the γ-Fe2O3material has a better sensitivity to R290, and the γ-Fe2O3material calcined at 200 °C shows the best performance. Our results can provide a theoretical basis for the design and optimization of semiconductor gas sensors for alkane detection.
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
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2024
·
IF 8
Wangchang Geng,Pengfei Song,Libing Duan,Tingyue Luan
Metal-organic frameworks (MOFs)-derived metal oxides have a high specific surface area and porous structure, making them promising for gas sensing applications. In this paper, MOFs-derived In 2 O 3 /ZnCo 2 O 4 composites were synthesized using a two-step solvothermal method. Through a series of characterization strategies, it is revealed that the morphology of the In 2 O 3 /ZnCo 2 O 4 composites consists of hollow microtubes and microflowers. The gas sensing performance of In 2 O 3 /ZnCo 2 O 4 composites was significantly enhanced compared to pure In 2 O 3 . Among them, the In 2 O 3 /ZnCo 2 O 4 -2 sensor exhibited superior performance towards 100 ppm n -butanol gas, with a lower operating temperature of 200℃, a higher response value of 208.7, a lower detection limit of 4.2 ppb, shorter response/recovery times of 152 s/223 s, higher selectivity, and better repeatability. Furthermore, the improved gas response can be attributed to the utilization of MOFs as self-sacrificial templates, the high specific surface area of the sensing materials, and the formation of p-n heterojunctions. This study provides a valuable reference for synthesizing n -butanol sensing materials with a high specific surface area, strong response, and excellent selectivity.
研究领域:
材料科学
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化学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xue-Chun Yang,Xuan Yao,Shaqi Fu,Yuyan Cao,Tingzhan Wang,Martin Köckerling,Lingli Cheng,Zheng Jiao,Jing-Tai Zhao
Ethylene glycol (EG) is a widely used material, but its vapor is harmful to human health already in low concentrations. Thus, highly sensitive EG gas sensors are urgently needed. Herein, a series samples of ZnO and carbon dots (CDs) were synthesized at different ratios through a simple mechanical grinding method. The senor made using ZnO/CDs2 exhibits an ultra-high response (Ra/Rg) to 100 ppm EG up to 2798, 1378 and 467, and extremely low detection limit as low as 21 ppb, 13 ppb and 2 ppb, under UV light, visible light, and infrared light, respectively, as well as excellent repeatability and long-term stability. Especially, under UV light irradiation, the response of ZnO/CDs2 to 100 ppm EG is 24 times that of pure ZnO (Ra/Rg = 114.7), and more than 71 times that of 9 other gases. The outstanding gas sensing performance of ZnO/CDs2 can be attributed to the excellent light response ability of CDs at first, which greatly enriches the electron concentration in ZnO/CDs under light irradiation. Furthermore, the photo-induced electron transfer (PET) property of CDs and the p-n heterojunction formed at the interface between ZnO and CDs play a key role in rapid electron transport and transfer, avoiding a large number of electron hole recombination.
研究领域:
材料科学
·
环境科学
·
光学工程
✓ 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）