SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Yujun Guo,Jiayi Qu,Zhenkai Zhang,Zhenyue Liu,Chen Yue,Qiuying Chen,Zhiguo Yang,Yang Mu,Xiaoning Wang,Davoud Dastan,Xi-Tao Yin,Xiaoguang Ma
In this paper, ZnS/NiO p-n heterojunction microspheres were fabricated via a two-step hydrothermal approach. The sensing properties of composites with different ZnS contents were investigated by regulating the ratio of Zn. When containing 25 mol% ZnS, the ZnS/NiO nanosphere sensor achieved a response of 125. The response was improved by a factor of about 83.3 compared to pure NiO. The sensor functions optimally at a temperature of 225 ℃, and it possesses excellent selectivity, a rapid response/recovery time (49/44 s), and long-term stability. Therefore, this paper provides a hydrothermal method to prepare ZnS/NiO nanocomposites with heterojunction, specifically designed to detect n-butanol. After performing a series of characterizations, it was determined that the enhancement of the gas-sensitive properties could be related to the construction of ZnS/NiO heterojunctions and the increase in oxygen vacancies.
研究领域:
材料科学
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化学传感器
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2025
·
IF 6.3
Yan Chen,Qingsong Luo,Yu Wan,Shuang Gao,Yanting Wang,Changhao Feng
Background The rapid identification of n-butanol holds substantial significance; however, the current response speed of n-butanol gas sensors is relatively slow. The ZnO/SnO 2 composite nanofibers present a considerable prospect as a suitable alternative for conventional n-butanol sensors. Methods Pure SnO 2 and composite nanofibers composed of ZnO/SnO 2 with distinct molar ratios were crafted via the electrospinning technique. The microstructure and components of these composite nanofibers were analyzed and identified using XRD and SEM. Significant findings The ZnO/SnO 2 composite nanofibers-based gas sensor (ZS2) exhibited enhanced response towards n-butanol, achieving a high response of 29.68 to 30 ppm n-butanol at 150 °C, which was 3.3 times greater than that of SnO 2 . Moreover, the sensor also showcased a swift response time, taking just 1 s to react. Furthermore, the ZS2 sensor had a lower potential limit for detecting n-butanol, with a value of 0.27 ppm. The good repeatability and stability were also confirmed in this study. The successful creation of heterojunctions is thought to be contributing factors to ZS2 nanofibers’ superior sensing capabilities. Therefore, ZnO/SnO 2 composite nanofibers can be considered as a promising candidate for sensing materials in practical applications.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2024
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IF 5.5
Song Zou,Yimu Wang,Yu Wan,Zhenxing Wang,Shuang Gao,Qingsong Luo,Yanting Wang,Changhao Feng
Background It is imperative to monitor the levels of n-butanol in the environment for the preservation of ecosystems and safeguarding human health. As a potential substitute for n-butanol sensors, the LaFeO 3 nanofibers show encouraging promise. Methods We have used the electrospinning method to successfully construct a series of Fe doping LaFe 1+x O 3 ( x = 0, 0.03, 0.05, 0.07) nanotubes. Through the use of XRD, FESEM, TEM, and EDS, the sample's morphological structure and composition were examined. Significant findings With a quick response/recovery time of 9/15 s, the gas sensor based on LF 1.05 O 3 nanotubes showed a staggering response of 33.6 at 150 °C toward 100 ppm n-butanol. Compared to the other test gases, this sensor demonstrated remarkable n-butanol selectivity. Furthermore, a methodical examination of the sensing mechanism was carried out.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2024
·
IF 5.5
Bo Wang,Zhenxing Wang,Yu Wan,Yimu Wang,Shuang Gao,Yan Chen,Qingsong Luo,Changhao Feng
Background Developing high-performance n -butanol gas sensors is of great significance for environmental protection and human health. The Bi-doped ZnFe 2 O 4 nanofibers exhibit promising potential as a viable option for n- butanol sensors. Methods In this study, a series of high response and fast response n -butanol gas sensors were successfully fabricated by Bi-doped ZnFe 2 O 4 nanofibers with different atomic percentages (0 %, 1 %, 3 %, 5 %), which were synthesized by a facile electrospinning method. Significant findings The nanofibers with a Bi/Zn molar ratio of 3 % showed a response value of 23.6 to 100 ppm n -butanol at 175 °C, which was 2.4 times higher than that of the pure ZnFe 2 O 4 nanofibers, and with a lower concentration detection limit (1.5 for 100 ppb n -butanol). In addition, the gas sensing materials had a good selectivity and long-term stability to n -butanol, and the mechanism of the good sensing performance of Bi doped ZnFe 2 O 4 nanofibers for n -butanol is also analyzed in this paper.
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
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Xu Tian,Lijia Yao,Xiuxiu Cui,Rongjun Zhao,Xuechun Xiao,Yude Wang
Fast and effective detection of harmful gases is crucial criterion for the current development of gas sensors. In this paper, a novel n-butanol gas sensor using Al-doped CdIn 2 O 4 nanofibers (ACO NFs) is synthesized by an electrospinning method . The different morphologies of the as-prepared ACO NFs are controlled by doping different Al contents . Systematic characterizations demonstrate that the doping of Al to CdIn 2 O 4 NFs would enhance the reaction activities between the gas and sensing materials, such as generating large amounts of adsorbed oxygen and improving the specific surface area of sensing materials. The results show that the detection limit of all prepared sensors for n-butanol is sub-ppm, and less than 250 ppb. The optimal Al-doped CdIn 2 O 4 (5.0% Al/Cd molar ratio) based gas sensor results in 3.32-fold enhancement in gas response to 200 ppm n-butanol at an operating temperature of 300 °C and exhibits excellent long-term stability compared with the pure CdIn 2 O 4 . Hence, ACO NFs can be regarded as a promising sensing material for low-concentration n-butanol gas detecting. Also, the mechanisms for improving the sensing performance of ACO NFs based gas sensor are proposed.
研究领域:
材料科学
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化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Shixin Huang,Wei Liu,Hailong Lin,Zhicheng Wen,Chunjin Hang,Rong An,Yongfeng Li,Yanhong Tian
The design of materials for the detection of n-butanol at low operating temperatures is of great significance for the reduction of power consumption and the improvement of the safety of the gas sensor. In this study, the solvothermal method and subsequent Ag-loading treatment were employed to synthesise hierarchical flower-like Cu-doped SnO 2 /Ag 2 S heterojunctions decorated with Ag (CSAA). The morphological and structural characterisation demonstrated that the amount of Cu 2+ doping and the duration of electroless Ag plating played a pivotal role in the morphological evolution of the SnO 2 -based hierarchical structure. The optimal CSAA composite exhibits the highest response of 1136 and the shortest response time of 6 s to 50 ppm n-butanol at 80°C, accompanied by superior selectivity, repeatability, humidity and long-term stability. The enhanced sensing performances of the CSAA sensor can be mainly ascribed to the hierarchical porous structure, the doping of Cu 2+ , the construction of SnO 2 /Ag 2 S heterostructures and the decoration of Ag nanoparticles (Ag NPs). Furthermore, the density functional theory simulation was employed to investigate the influence of Ag NPs and Ag 2 S on the adsorption properties and electronic behaviour of n-butanol on the surface of SnO 2 . This work proposes a friendly strategy and theoretical support for enhancing the sensing performance of MOS sensors in the practical detection of n-butanol.
研究领域:
材料科学
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化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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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
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
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2020
·Vol. 35
·期 9
·095030
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IF 2.361
Zhiqiang Yao,Xi Wang,Man Yang,He Ma,Yanfeng Sun,Hong Zhang,Tianwei Dong,Weifeng Liu
Doping of noble metals into semiconductors is often used to enhance the response of gas sensors, accompanying the decrease of the particle size. In this work, pure and palladium-doped dispersive nanoscale tin dioxide nanoparticles with abundant surface defects are synthesized efficiently via a facile hydrothermal method. In the experiment, glucose is used as the carbon source to limit the growth of crystals through the carbonization process and create abundant surface defects after high temperature calcination. Compared with pure SnO2, Pd doping only slightly decreases the particle size with the increase of palladium doping amount from 11.9 nm to 9.6 nm. A gas-sensing investigation indicates that the sensor devices based on pure and 1 at%, 3 at%, 5 at% palladium-doped SnO2 show an obvious high response to n-butanol. In particular, the response to n-butanol reaches to the maximum with the palladium doping amount of 3 at%, and the response increases from 33.3 to 92.9 to 100 ppm n-butanol compared with pristine SnO2 nanoparticle at optimal working temperatures. A gas-sensing mechanism related to surface defects, chemical and electrical sensitization is also discussed.
研究领域:
材料科学
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化学工程
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传感器技术
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产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
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2024
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IF 2.8
MeiGe Ding,XiHao Gao,Yongchen Sui,Zhenyu Yuan
This study designs to investigate a high-performance n-butanol gas sensor with a porous morphology. Porous ZnO flakes modified with Ag particles are prepared in two steps using hydrothermal and precipitation methods. Morphological analysis of the samples shows that the ZnO flakes were covered with mesopores with high porosity, and their edge lengths ranged from 3 μm to 6 μm, with a minimum thickness of 11.3 nm. Through rigorous gas sensing testing, we find that the optimal mass percentage Ag-ZnO sensor provided significantly better sensing behavior, with a 100.8 response for 100 ppm n-butanol, compared to 14.5 for the pure ZnO sensor, a 5.95-fold improvement. In addition, the sensor's optimal operating temperature is reduced from 290 °C to 190 °C, increasing its adaptability and versatility in practical applications. In subsequent tests, it is found that this Ag-ZnO sensor not only shows excellent selectivity to n-butanol but also favorable stability, with no significant degradation during 30 days of continuous testing. The experimental analysis shows that the formation of porous flake structure and the modification of Ag particles are effective approaches to improve the ZnO gas sensor.
研究领域:
材料科学
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传感器技术
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纳米技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
In this study, porous sheet-like nanostructured Co 3 O 4 -CuO-CuOHF composites with great n-butanol sensing properties were synthesized by the biotemplate method and hydrothermal method . The effect of various contents of Co 3 O 4 -CuO-CuOHF sensor performance was systematically investigated, in which the best performance was achieved for the composite with 0.03 g Co 3 O 4 addition. The response of the best content Co 3 O 4 -CuO-CuOHF composite sensor to 100 ppm n-butanol at 180 ℃ is 120, which is 8 times higher than that of the CuO-CuOHF sensor. The composite sensor has excellent selectivity for n-butanol and responds 3.75–25 times higher to n-butanol than other target gases. It is detectable up to 500 ppb n-butanol and has potential promise for low concentration detection. Furthermore, it has outstanding stability and resistance to humidity. The gas sensing mechanism was analyzed by UV–visible diffuse reflectance spectroscopy, EPR oxygen vacancies and X-ray photoelectron spectroscopy, which indicated that the abundant oxygen vacancies , the physical adsorption of polar hydroxyl bonds, the electronegative fluorine substitution and the special microstructure of the composite contributed to its gas-sensitive performance.
研究领域:
材料科学
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纳米科技
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传感器技术
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表面化学
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功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）