CERAMICS INTERNATIONAL
·
2026
·
IF 6
Jiahui Lin,Yue Wang,Leyao Bi,Jiaxing Fu,Junsheng Wen,Chunjie Wang
Despite being classified as a low-toxicity chemical, isobutanol poses non-negligible hazards to human health and the environment. This study reports, for the first time, the successful synthesis of porous CuO/CeF 3 /CeO 2 nanocomposites via a two-step hydrothermal method and demonstrates their application in isobutanol gas detection. The composition and morphological characteristics of the sensing material were determined through XRD, SEM, TEM, EDX, FT-IR, Raman, UV-vis, and XPS, and its gas-sensing properties were systematically investigated. The CuO/CeF 3 /CeO 2 -3 sensor exhibits a high response of 24.5 towards 100 ppm isobutanol at 180 °C, which is nearly eight times that of pristine CuO (3.1). Additionally, it demonstrates rapid response and recovery time of 13 s and 9 s, respectively, and still achieves a considerable response of 3.6 even at a low concentration of 5 ppm. Furthermore, the short-term repeatability, gas selectivity, response under various relative humidity levels, and long-term stability (over 28 days) of the sensor were evaluated. Finally, the mechanism behind the enhanced gas-sensing performance of the CuO/CeF 3 /CeO 2 sensor was thoroughly investigated, which is primarily attributed to four aspects: the synergistic modulation effect of the p-n heterojunction and the insulating layer, the formation of the porous structure, the significantly increased proportion of chemisorbed oxygen (O C ), and the dual catalytic effect exerted by both CeF 3 and CeO 2 .
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yan Chen,Qingsong Luo,Shuang Gao,Runduo Teng,Qiyuan Fu,Yanting Wang,Changhao Feng
The highly sensitive and rapid detection of n-butanol holds great significance for environmental protection and human health. In this study, Ag-decorated ZnO/SnO 2 (AZSO) nanofibers were fabricated via electrospinning followed by an Ag decoration process. Compared with the undecorated ZnO/SnO 2 nanofibers (ZSO), the as-prepared AZSO sensor exhibited enhanced gas-sensing performance, as its response to 30 ppm n-butanol increased from 29.68 to 37.15. Meanwhile, at the optimal operating temperature of 150 °C, it demonstrates an ultra-fast response time of only 1 s, and its recovery time is drastically shortened from 1776 s to 227 s. In addition, AZSO exhibited stronger selectivity towards n-butanol, accompanied by excellent repeatability and long-term stability. The enhanced gas-sensing performance of AZSO was attributed to the synergistic effect of the Ag spillover effect, the ZnO/SnO 2 n-n heterojunction, and the interfacial electron transfer.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 11
·826
·
IF 3.2
Wang Yanting,Teng Runduo,Tu Wenjun,Gao Shuang,Luo Qingsong,Yue Lei,Feng Changhao
A facile electrospinning method was utilized to fabricate nickel ferrite (NiFe 2 O 4 ) nanotubes at different calcination temperatures (550 ℃, 600 ℃, 650 ℃, and 700 ℃). The structure of the nanotubes was characterized and analyzed using XRD, FE-SEM, and TEM. The results indicate that the surface of the NiFe 2 O 4 nanotubes gradually became rougher with increasing calcination temperature. When the calcination temperature reached 600 ℃, the NiFe 2 O 4 nanotubes exhibited the highest gas-sensing performance (R g /R a = 16.1) toward 100 ppm triethylamine (TEA) at the operating temperature of 125 °C. Compared to other tested gases, the NiFe 2 O 4 nanotubes demonstrated significant selectivity for triethylamine. Furthermore, the influence of calcination temperature on the sensing performance of the NiFe 2 O 4 nanotubes was investigated.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wenhui Yu,Qianglin Hao,Chao Zhang,Duo Sun,Shengping Ruan,Lili Wang
With its distinct layered structure, large specific surface area, and quick charge carrier transport capabilities, two-dimensional (2D) metal sulfide In 2 S 3 has emerged as a very promising gas sensing material. In this work, flower-like In 2 S 3 materials rich in sulfur vacancies (Sv) are generated using a vacancy engineering technique, and their gas-sensing performance for triethylamine (TEA) is thoroughly studied. The number of active sites on the material's surface and the effectiveness of electron transfer were greatly increased by precisely controlling sulfur vacancy defects by the modification of the sulfur source's concentration. With a working temperature as low as 160 °C, a response time of just 4 s, and a response value of 8.2 for 100 ppm TEA, the produced Sv-In 2 S 3 -2 sensor has exceptional TEA detection capabilities. It also demonstrated long-term stability and outstanding selectivity. In order to improve the TEA gas-sensing capabilities of In 2 S 3 materials, this study demonstrates that the addition of sulfur vacancies can yield a large number of Lewis acidic sites and reactive centers.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xiangyun Liao,Chengdong Kong,Yanchi Jiang,Xiaojiang Wu,Zhongxiao Zhang
Chemical absorption with amines offers an attractive solution for large-scale carbon mitigation, but its practical application is impeded by high regeneration energy consumption. Despite extensive efforts to accelerate regeneration through chemical catalysis, inefficient gas-liquid mass transfer during desorption remains a major bottleneck. Herein, we report a microcavity-engineered desorption packing fabricated via nanosecond laser etching to promote bubble nucleation and release. Benefiting from the enhanced mass transfer, the optimized desorption packing enhances the maximum desorption rate by 92.2% and reduces the relative heat duty by 35.8% compared to the blank case, without significant performance degradation after multiple desorption cycles. Mechanistic studies show that the laser-induced microcavities can entrap gas to form stable gas nuclei sites, reducing the supersaturation barrier for bubble nucleation and thus accelerating the amine regeneration. The universality of this microcavity engineering strategy is demonstrated by its successful implementation on different substrate materials, including Ni, Ti, and Fe. This study provides new ideas for the design and fabrication of highly efficient desorption packings.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Zhiyuan Zhu,Chengli Tang,Xiaoming Li,Ming Li,Peng Wang
Reliable gas sensor is obligatory for accurate detection of ammonia gas concentration in many fields. In this paper, a MoS 2 @PANI (polyaniline) composite prepared by a simple in-situ polymerization process of polyaniline on MoS 2 matrix was applied as the ammonia sensing material. Characterizations of SEM (Scanning Electron Microscope), TEM (Transmission Electron Microscope), EDS (Energy-Dispersive X-ray Spectroscopy), XRD (X-ray Diffraction) and BET (Brunauer-Emmett-Teller) were carried out to confirm the information of surface morphology, element, crystallography, and specific surface area of the prepared materials. The MoS 2 @PANI-based sensor showed tunable n-to-p response to ammonia gas depending on the doping content of PANI. The prepared MoS 2 @PANI sensor exhibited a fast response and recovery (16 s/41 s) to 100 ppm of ammonia gas with response value of 4.24 at room temperature. It was demonstrated for satisfying selectivity, repeatability, and stability. Specifically, the XPS (X-ray Photoelectron Spectroscopy) in vacuum and in-situ XPS in ammonia atmosphere was carried out and analyzed to investigate intuitive and powerful evidence for the gas sensing mechanism. On one hand, the coordination interactions between the PANI and MoS 2 during the in-situ oxidative polymerization of aniline was demonstrated by formation of Mo-N bond. On the other hand, the existence and function of multiple adsorption sites in the ammonia sensing process was also confirmed. Based on these advantages of the sensor, a portable and visual device by integrating the wireless signal connection, the prepared sensor, and the mobile phone was designed for the real-time monitoring and timely warning of ammonia concentration. The improved sensing performance and probable sensing mechanism elucidated can provide helpful reference for the development of room-temperature responsive ammonia gas sensors.
研究领域:
材料科学
·
传感器技术
·
化学
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高影响因子
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
·
2025
·
IF 5.9
Fanli Meng,Weijia Cui,Yang Liu,Yanbai Shen,Zhenyu Yuan
In view of the poor sensitivity and upper detection limit of triethylamine gas sensors, high performance triethylamine sensor was prepared by adjusting the crystalline phase of MoO3. In this work, the orthorhombic phase MoO3 nanobelts were synthesized through hydrothermal method and used for the detection of triethylamine. The experimental outcomes indicate that the orthorhombic phase MoO3 gas sensor exhibits the peak responsiveness, which reaches 774.47 when the concentration of triethylamine is 100 ppm at 220°C accompanied by a theoretical detection threshold as minute as 10 ppb. The orthorhombic phase MoO3 sensor has superior selectivity for triethylamine stemming from the robust Lewis acid-base interplay with MoO3 and triethylamine and the C-N of triethylamine is easily broken. Finally, the sensing mechanism of orthorhombic phase MoO3 gas sensor is deeply analyzed. Since orthorhombic phase MoO3 possesses a narrow band gap and small size effect, and has a high adsorption energy for triethylamine, the gas sensor exhibits excellent performance. The strategic design of crystalline phase modulation serves as a pivotal approach to enhancing the properties of gas sensors.
研究领域:
材料科学
·
化学
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Hui Zhang,Jing-Chun Feng,Bin Wang,Yongming Shen,Yue Zhang,Si Zhang
Understanding the interfacial formation characteristics of methane hydrates in deep-sea environments is fundamental to isolate leaking methane (a potent greenhouse gas). We observed the three-dimensional (3-D) characteristics of methane hydrate film (HF) growth at the gas–liquid interface (GLI) under different pressures using micro-nano industrial X-ray computed tomography (X-CT). The results indicate that the primary growth mode of the HFs at the GLI after initial formation was growth through the continuous formation of cracks. This crack-induced growth enhanced the hydrate conversion rate. We compared the thickness distribution characteristics of the hydrate growth under varying pressures. While the early HF exhibited thickening, the average thickness in the later stage of hydrate growth remained relatively stable and homogeneity. This study on the growth characteristics of HFs at the GLI provides a foundation for further development of efficient and stable methods for hydrate utilization and sequestration.
研究领域:
环境科学
·
材料科学
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Wenshuai Yang,Mingsheng Luo,Zhi Yang,Roshni Rahman,Ziyuan Li,Xiaoteng Cui,Lingman Xia
A highly dispersed FeCu/LDH-based catalyst precursor was prepared by co-precipitation method, and the catalysts promoted with Pd, Pt or Rh were then prepared using an equal-volume impregnation method to be used in syngas-to-alcohol reaction. These samples were characterized by XRD, Raman, FT-IR, In-situ DRIFT, XPS, SEM and N 2 adsorption desorption. The study reveals that the 2D nanosheet structure of the LDH precursor has a large surface area and evenly distributed active sites, leading to the superior catalyst performance. The promoted catalyst generated even higher catalytic activity and alcohol selectivity, notably reducing undesired methane and CO 2 by-products. Rh incorporation obviously enhanced the thermal stability of the catalyst, leading to the long-term retention of the LDH structure. Rich -OH groups offer surface basicity, thereby significantly enhancing its catalytic performance to lower the CO 2 selectivity to 1.34 % and methane to 1.67 % while achieving a remarkable alcohol selectivity of 95.1 %. In-situ DRIFT results reveal that Rh promotion helps balance the gaseous adsorption and bridge adsorption of CO for improved overall syngas-to-alcohols reaction results.
研究领域:
化学工程
·
催化材料科学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Liwei Zhang,Jinmei Tian,Yuting Wang,Tianqi Wang,Meijie Wei,Feng Li,Dan Li,Ying Yang,Hui Yu,Xiangting Dong
Polyoxometalates (POMs), as a kind of electron acceptors , comes into sight in gas sensing field. Here, we in situ construct a group of polyoxomethoate/semiconductor one-dimensional tandem heterojunction materials using convenient one-step coaxial electrospinning method . A polyoxometalates electron acceptor layer was intercalated into In 2 O 3 @SnO 2 nanofibers (NFs), forming In 2 O 3 @PW 12 @SnO 2 coaxial core-middle-shell NFs. Gas sensing performances of the one-dimensional In 2 O 3 @PW 12 @SnO 2 tandem heterojunctions were investigated for the first time. The fabricated NFs exhibited excellent detection performances for ethanol gas. The optimal sensitivity response to 100 ppm ethanol can reach 22.6, which is about 4 times that of POMs-free samples. Other gas sensing parameters were also comprehensively studied. The significant enhancement can be attributed to the addition of appropriate amount of PW 12 electron acceptor which accelerate electrons transfer and reduce the recombination of electron-hole pairs. This work provides a novel strategy for developing high performance gas sensors by constructing tandem heterojunctions as well as introducing POMs electron acceptor, and offers new insight into the development of POMs-based gas sensors.
研究领域:
材料科学
·
化学传感器
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qingyuan Zhang,Kai Chen,Qin Chen,Wenlu Hang,Haiyan Feng,Xinyue Zhang,Cunao Feng,Xiaowei Li,Dekun Zhang,Shirong Ge
Flexible sensing materials have emerged as pivotal tools for human health monitoring and motion detection. However, single-functional flexible sensors currently suffer from insufficient versatility to address complex detection demands, particularly in multifaceted application scenarios such as real-time physiological signal monitoring and environmental gas sensing. Herein, a strategy of using PVA and CS as matrix materials is reported to fabricate strain/gas multifunctional flexible hydrogels, which are endowed with ionic conductivity and mechanical robustness via immersion in LiCl electrolyte solution. The as-prepared PVA 7 /CS 3 -LiCl 1.5 hydrogel exhibited remarkable strain sensitivity with response values of 6.5 % (tensile) and − 24 % (compressive) at 8 % strain. After 200 cycles of stretching, the relative resistance remained stable, demonstrating superior mechanical stability and cyclic durability. And relative resistance change (ΔR/R₀) showed linear dependence on strain, with gauge factors (GFs) of 0.45 (1–7 % strain), 2.66 (7–10 % strain), and 0.93 (10–90 % strain), respectively. Optimal performance was achieved at 3 wt% CS and 1.5 mol/L LiCl, where the hydrogel exhibited a 2.5 % response to 20 ppm acetone with 5-fold higher selectivity than benzene, ethanol, and ammonia. These multifunctional hydrogels enable versatile room-temperature applications, particularly for human physiological signal monitoring, offering promising strategies for sensing materials in complex environments.
研究领域:
材料科学
·
柔性电子学
·
传感器与执行器
·
可穿戴设备
·
健康监测技术
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qingping Xin,Zhaoqi Qu,Xinghui Zhang,Xingwei Wang,Jiaxin Wu,Dengdi Wu,Wei Huang,Mengke Wang,Ningning Gao,Xiaoli Ding,Yuzhong Zhang
Composite membranes, which consist of a multi-layer membrane structure comprising an ultra-thin dense separation layer and a porous support layer, are used for gas separation. However, issues such as poor adhesion between layers often arise. In this study, a novel reverse-induced diffusion method was employed to achieve the in situ growth of a covalent organic framework COF (TaPa-1) on one side of polyacrylonitrile (PAN) at room temperature, resulting in the formation of a tightly bonded gutter layer. Subsequently, a metal-organic framework MOF (NH 2 -ZIF-8) was secondarily grown in situ on the TaPa-1 membrane to prepare a PAN/COF-MOF composite membrane with stable interlayer bonding. The TaPa-1 layer, with high gas permeability, and the NH 2 -ZIF-8 layer due to sheltering effect, with high gas selectivity, act synergistically to enable efficient gas sieving and rapid transport. When treating simulated flue gas (CO₂/N₂ = 1:4), the gas separation selectivity of the PAN/COF-MOF composite membrane reach 29.9, with a CO₂ permeability of 825 GPU, achieving excellent CO₂ separation performance. In this study, the PAN/COF-MOF composite membrane is constructed using the reverse-induced diffusion method, achieving stable interlayer bonding and synergistic separation, demonstrating excellent CO₂ permeability and selectivity.
研究领域:
材料科学
·
膜技术
·
气体分离
·
可持续能源
·
环境工程
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高影响因子
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