SENSORS
·
2019
·Vol. 19
·期 11
·2581
·
IF 3.031
Wei Shan,Zhengqian Fu,Mingsheng Ma,Zhifu Liu,Zhenggang Xue,Jiaqiang Xu,Faqiang Zhang,Yongxiang Li
Tin(II) monosulfide (SnS) nanosheets were synthesized using SnCl4•5H2O and S powders as raw materials in the presence of H2O via a facile chemical bath method. Orthorhombic phase SnS nanosheets with a thickness of ~100 nm and lateral dimensions of 2~10 μm were obtained by controlling the synthesis parameters. The formation of a SnO2intermediate is key to the valence reduction of Sn ions (from IV to II) and the formation of SnS. The gas sensors fabricated from SnS nanosheets exhibited an excellent response of 14.86 to 100 ppm ethanol vapor when operating at 160 °C, as well as fast response and recovery times of 23 s and 26 s, respectively. The sensors showed excellent selectivity for the detection of ethanol over acetone, methanol, and ammonia gases, which indicates the SnS nanosheets are promising for high-performance ethanol gas sensing applications.Keywords:gas sensors;SnS nanosheets;chemical bath synthesis;oleylamine;ethanol sensing
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 31
·1-15
·
IF 2.8
Zhang Yuhong,Liu Yanchang,Qu Zhihao,Liu Junlong,Tian Siye,Liu Hang
In this paper, AuPd alloy nanoparticles (NPs) are prepared by co-reduction method using double reducing agents. Different mass percentages of AuPd alloy NPs loaded ZnO nanomaterials are prepared by classical impregnation method. The gas sensing properties of the sensor are studied. 0.5 wt% AuPd–ZnO exhibits a higher gas sensing response (Ra/Rg = 32, 50 ppm ethanol), which is 1.88 times that of ZnO gas sensing response. At the same time, the response/recovery time is 2 s/29 s. Compared with ZnO, the recovery time is reduced by 55 s. At last, the sensing mechanism in the process of gas sensing test is analyzed based on AuPd alloy NPs and ZnO.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Boyan Fu,Leyao Bi,Jiahui Lin,Jiaxing Fu,Junsheng Wen,Binglin Zou,Chunjie Wang,Yue Wang
ABO 3 -type gas sensors for ethanol gas-sensing remain a significant challenge. In this paper, porous microspheres of La 0.9 Fe 1-x Co x O 3 (x = 0, 0.05, 0.1, 0.15, 0.2) were synthesized via a ultrasonic-assisted hydrothermal method. The materials were characterized with various techniques to determine their phase structures, morphologies, electrochemical properties, and sensing abilities. For all investigated sensors, La 0.9 Fe 0.85 Co 0.15 O 3 exhibited a response value of 50.445 for 100 ppm ethanol gas at 200 °C (RH = 35 %), which is over eight times higher than that of LaFeO 3 under the same conditions. In addition to its high response to ethanol, La 0.9 Fe 0.85 Co 0.15 O 3 has excellent selectivity, humidity resistance (35–95 % RH), and a fast response/recovery time (18/9 s). Further analyses demonstrate that the synergistic effect of A-site cation defects and Co-doping plays a pivotal role in enhancing sensing performance by effectively increasing oxygen vacancy content and adsorption energy. This work presents an effective approach for developing high-performance ethanol gas sensors based on LaFeO 3 .
研究领域:
材料科学
·
化学传感
·
纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yanwei Xiao,Shuhe Hu,Yuanyuan Liu,Ao Zhang,Zhen Yao,Ye Tian,Huiling Li,Yang Ning,Feng Li,Fengdong Qu,Dong Yao,Hao Zhang
Two-dimensional (2D) BiVO 4 nanosheets (NSs), featuring distinctive chemical properties and dangling-bond-rich surfaces, are promising for developing high-performance gas sensors. However, the previously reported 2D BiVO 4 NSs-based devices suffer from a low responsivity and poor selectivity. Here, catalytic metal (Pt) nanoparticles (NPs) are functionalized on the surface of BiVO 4 NSs to improve the sensing ability. Comparative investigations verify the significant enhancement in acetone sensing after Pt modification. The Pt NPs-loaded BiVO 4 exhibits a response of 12.5–100 ppm acetone, which is 3.2 times higher than that of pure BiVO 4 sensor. Besides, the Pt-BiVO 4 sensor possesses better selectivity and lower detection limit. From both the experimental results and density functional theory (DFT) calculation, the effects of Pt modification are elucidated as a synergy of chemical and electronic sensitization. The loading of Pt benefits the thickening of electron depletion layer , and accumulating and activating the acetone molecules, which accelerate the reaction between acetone and chemisorbed oxygen species, resulting in enhanced sensing performance. This work gives deep insights into the effects of noble metal modification on metal oxide-based sensing material and could serve as a guideline for further designing novel high-performance sensing materials.
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
·
2021
·
IF 7.46
Chaoge Zhou,Fanqi Meng,Ke Chen,Xueli Yang,Tianshuang Wang,Peng Sun,Fangmeng Liu,Xu Yan,Kengo Shimanoe,Geyu Lu
In this work, we successfully prepare the octahedral NiO/Zn 2 SnO 4 p-n heterostructure by a simple hydrothermal synthesis and subsequent wet impregnation process. The microscopic morphology characterization results show that the as-prepared composites are uniformly dispersed and have an octahedral structure with a size of 3−5 μm. The gas devices are fabricated and their sensing performances are investigated systematically. The response and selectivity of NiO/Zn 2 SnO 4 composites to acetone have been significantly improved than that of pure Zn 2 SnO 4 . Moreover, the response of the sensor to 100 ppb acetone is 1.4 at 300 °C, indicating that the detection limit is less than 100 ppb. The enhancement in sensing properties of composites is largely due to the p-n heterojunction formed by NiO and Zn 2 SnO 4 , which causes the transfer of carriers and the catalytic effect of NiO.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Rongrong Jin,Yueru Jiang,Liupeng Zhao,Tianshuang Wang,Xiaomin Liu,Fangmeng Liu,Xu Yan,Peng Sun,Geyu Lu
In this paper, we successfully prepared Ru-doped Co 3 O 4 flower-like hollow microspheres by a simple hydrothermal method . The microstructure characterization results indicated the formation of well-organized microflowers with a size of 0.5–1 µm, which were composed of nanosheets . The gas sensing performances of sensors by using the synthesized Ru-doped Co 3 O 4 hollow microflowers as sensing material were investigated. The 1 at% Ru-doped Co 3 O 4 sensor showed the best acetone sensing performance and had a response 18.8–10 ppm acetone, which was almost 5.4 times that of pure Co 3 O 4 . Significantly, the sensor had an ultra-low detection limit, with a response value of 1.5–50 ppb acetone at 137.5 °C (30%RH). We propose a plausible mechanism for sensing performance improvement. Namely, the substitution of Ru 4+ regulated the carrier concentration and induced the change of Co 3 O 4 defect oxygen and chemisorbed oxygen.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Lin Li,Daocheng Hong,Bohao Liu,Tianci Su,XiuLi Yang,Lu Yue,Wenhui Zhang
Porous zinc doped indium oxide (Zn-In 2 O 3 ) nanobelts were synthesized using a straightforward hydrothermal method. The effects of different metal doping (Zn, Sn, Sm, Yb, Cu) and various concentrations of Zn on the morphology and gas-sensing properties of In 2 O 3 were investigated. The gas sensing evaluations reveal that among all tested sensors, the porous 7.5% Zn-In 2 O 3 nanobelt sensor exhibits the highest response, reaching 127 (S= R a / R g ) to 50 ppm acetone at a low operating temperature of 140°C, which is approximately 21 times greater than that of pure In 2 O 3 . Additionally, this sensor demonstrates rapid response/recovery time, a low detection limit of 40 ppb, good selectivity, excellent repeatability, and long-term stability toward acetone. In-situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and density functional theory (DFT) calculations are employed to elucidate the mechanisms behind the enhanced gas-sensing performance of the porous Zn-In 2 O 3 nanobelts. The superior gas-sensing characteristics are attributed to the distinctive porous nanobelt architecture, abundant oxygen vacancies, large specific surface area, and the effects of Zn doping.
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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 14
·1-20
·
IF 2.8
Wen Jun,Rui Yiting,Yi Zichuan,Zhang Xiaowen,Lin Zhidong,Liu Liming
Herein, we report the facile hydrothermal synthesis of Bi 2 MoO 6 nanosheets, achieved through the combined use of surfactant-assisted and pH-controlled conditions. A comparative analysis of different types and concentrations of surfactants was conducted to determine the optimal conditions for synthesis. The resulting Bi 2 MoO 6 features a mesoporous architecture composed of interconnected nanosheets with an average pore size of approximately 3 nm. Characterization results reveal that this dual approach of surfactant addition and pH control effectively modulates the morphology and optimizes the band gap energy levels of bismuth molybdate materials, significantly enhancing the specific surface area. Notably, Bi 2 MoO 6 synthesized with 0.2 mmol of L-Tartaric acid (TA) achieved an exceptionally high response value of 118 to 100 ppm ethanol at an operating temperature of 200 °C, and the sensor demonstrated a practical detection limit as low as 20 ppb (S = 4.13), showcasing its high sensitivity. Additionally, the sensors demonstrated remarkable selectivity for ethanol, outperforming other gases in the concentration range of 100 ppm to 20 ppb. These findings underscore the promise of Bi 2 MoO 6 gas sensors prepared via surfactant addition and pH control for the rapid and sensitive detection of low ethanol concentrations at low temperatures. This method could have significant implications for environmental monitoring and industrial safety applications, where the detection of trace levels of ethanol is critical. This Bi 2 MoO 6 -based sensor, with its combination of high sensitivity, selectivity, and stability, stands out as a valuable tool for advanced gas sensing applications.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jun Xu,Xiaoqian Qu,Wenjie Yang,Yingqi Luan,Xinsheng Ding,Yingshuai Wang,Lulu Guo,Ke Wu,Zhimin Yang
The development of acetone gas sensors with high sensitivity, low detection limits and scalability holds significant importance for industrial production safety and disease diagnosis. Herein, oxygen vacancies-enriched α-Fe 2 O 3 nanoparticles (M-Fe 2 O 3 NPs) were synthesized through a novel metal-organic gel template strategy. Gas sensing experiments revealed that the prepared M-Fe 2 O 3 sensor displayed unique p-type semiconductor behavior, distinct from the n-type commercial α-Fe 2 O 3 (C-Fe 2 O 3 ) sensor. Moreover, the sensor demonstrated excellent acetone sensing performance, including high response (2.6 @ 20 ppm), low detection limit (0.5 ppm), remarkable repeatability and selectivity, even under 80% relative humidity (RH), displaying impressive response and recovery properties. The enhanced p-type sensing properties of the M-Fe 2 O 3 sensor were attributed to oxygen vacancies facilitating inversion (hole) layer formation and accelerating chemical reactions on the sensing materials surface, as evidenced by gas sensing performance data and O 2 -TPD characterization. Finally, the feasibility of preliminary diabetes diagnosis was demonstrated by detecting acetone levels in human exhaled breath. This work not only presents a straightforward approach for designing oxygen vacancies-enriched metal oxides but also has potential applications in constructing high-performance acetone sensing systems for diabetes diagnosis.
研究领域:
材料科学
·
医学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3653-3657
·
IF 1.339
Liu Juan,Li Wei,Zhu Linghui,Li Chao,Qu Fengdong,Guo Wenbin,Feng Caihui,Ruan Shengping
In this paper, In2O3 nanotubes were prepared by an electrospinning method combined with an oriented-contract calcinations scheme, and characterized by differential thermal and thermal gravimetric analyzer (DTA-TGA), X-ray diffraction (XRD), and scanning electron
microscopy (SEM). Ethanol sensing properties of the as-prepared nanotubes were investigated. The results showed that the In2O3 nanotubes were obtained at a fast heating rate of 100 °C/min. Ethanol sensing properties indicated that the nanotubes exhibit a high response
of 87.5 to 500 ppm ethanol, fast response (20 s) and recovery (18 s) rate at the optimal operating temperature of 260 °C. Moreover, the nanotubes also exhibit good selectivity.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhe Liu,Zheng Li,Ruiqi Han,Zhenting Wu,Yanpeng Liu,Xin Tan,ShuangYan Meng,Yanrong Wang,Shanglong Peng
MXene has found widespread application in gas sensing applications through the formation of composite materials with metal oxides, with its excellent electrical conductivity and high specific surface area being its core advantages. However, during the synthesis of composite materials, MXene oxidizes to TiO 2 , leading to reduced electrical conductivity and a decrease in specific surface area. Additionally, MXene oxidation issues arise during gas sensing tests. To address these limitations, we developed a pre-oxidation doping strategy using nitrogen annealing, which preserves MXene's large specific surface area and conductivity during subsequent experiments. Experimental data confirmed that the pre-oxidation single-doping strategy retained the Ti 2p orbital characteristics, indicating that the treated MXene still maintains its two-dimensional material properties. The optimized Co 3 O 4 /N-MX7.5 composite exhibits peak ethanol sensing performance at 120°C, with improved selectivity attributed to enhanced conductivity due to nitrogen doping. This study establishes a methodological approach to mitigate MXene oxidation and functional group interference, advancing the rational design of MXene-based gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 10
·1-12
·
IF 2.8
Li Ziheng,Zhang Mingxue,Zhang Zeyu,Hao Hongshun,Yan Shuang
Two-dimensional chalcogenides have made significant advances as chemiresistive gas sensors due to their high sensing response and low power consumption. However, their inherent morphological complexity, low thermal oxidation temperature, and poor conductivity pose as major obstacles to practical application. In this study, we introduced a synthesis method in combination of hydrothermal reaction and heat treatment to fabricate SnS-based sensing materials with different forms of two-dimensional nanostructure. During preparation, SnS 2 with different morphologies were firstly synthesized via hydrothermal reaction, followed by thermal oxidation and nitrogen calcination, flower-like SnS nanostructure, and nanoflake SnS–SnO 2 composite, respectively. The samples synthesized by this method demonstrate improved crystallinity, which can overcome the obstacle of poor conductivity. In comparison, the flower-like SnS nanostructure assembled by ultra-thin nanosheets demonstrates improved gas-sensitive performance over nanoflake SnS–SnO 2 composite. At the working temperature of 200 °C, the SnS sensor shows a response value as high as 13.3- to 100-ppm ethanol. Besides, the sensor exhibits stable sensing performance and excellent recovery characteristics in response to ethanol. The preparation method proposed in this paper provides an effective approach for the development of high-performance two-dimensional chalcogenide gas sensing materials.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
高影响因子
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