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
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化学传感
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纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Zhen Sun,Xueli Yang,Wenlu Liu,Yalin Zhang,Zheng Hu,Guofeng Pan,Yehong Cheng
Morphology control significantly improves the microstructure, increases the number of defects, tailors porosity, and optimizes the band gap of gas-sensing materials, profoundly affecting the adsorption and desorption capabilities for gas molecules. Herein, we prepared In(OH) 3 precursors via a hydrothermal method and rationally controlled the microstructure of In 2 O 3 by varying annealing temperatures (400°C, 500°C, 600°C). Characterizations revealed that the porous cubic In 2 O 3 -500 (500°C) exhibited superior properties, including more balanced grain size and crystallinity, superior pore structure, more oxygen vacancies and adsorbed oxygen, and a narrower band gap compared to the surface-dense cubic In 2 O 3 -400 (400°C) and the porous spherical In 2 O 3 -600 (600°C). Gas-sensing tests demonstrated that three sensors displayed exceptional selectivity towards formaldehyde (HCHO), with rapid response times (1 s) to 100 ppm HCHO. Notably, In 2 O 3 -500, operating at a lower temperature (175°C), achieved the highest response (R a /R g = 200), good humidity resistance, and the lowest detection limit (30 ppb). The gas-sensing performance at 60 RH% showed that In 2 O 3 -500 still exhibited the highest response (161) to 100 ppm HCHO at 175℃, a decrease of less than 20 %. This study offers insights into the cost-effective and facile fabrication of high-performance HCHO gas sensors based on In 2 O 3 materials.
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 HAZARDOUS MATERIALS
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2025
·
IF 11.3
Chao Xu,Liang Jiang,Yifan Zhang,Guiying Zhu,Xuanjin Zhu,Yue Zhao,Xiao-Peng Li,Shenghui Zhang,Heguo Li,Lei Xu,Changyun Li,Xinjian He,Jiefeng Gao,Huan Xu
The biomimetic design principles offer promising solutions to fabrication of multifunctional nanofibrous membranes (NFMs) with on-demand hierarchies and properties. Herein, a combined electrospinning electrospray approach was employed to firmly anchor MOF nanocrystals onto poly(lactic acid) (PLA) nanofibers, resembling the naturally occurring dense protrusions at the lotus leaf. The formation of unique MOF-protruding superstructures gave rise to an exceptional combination of increased electroactivity, in-situ electret properties and charge regeneration mechanisms, as well as remarkable humidity resistance. With 8 wt% bioinspired MOF-protrusions for the electrospun electrosprayed PLA NFMs (BM-PLA8), the initial surface potential was elevated to 3.0 kV and slightly decreased to 2.6 kV after 7-day ageing, in clear contrast to only 1.1 and 0.6 kV for the normal PLA, respectively. Moreover, the tribo-output voltage and current were significantly promoted for BM-PLA8 (64.5 V and 151.6 nA), demonstrating high humidity resistance and long-term robustness even at 90 % RH. It conferred distinct improvements in air filtration performance for BM-PLA8 even at the highest airflow velocity of 85 L/min (below 250 Pa, 99.9 % and 95.0 % removal of PM 2.5 and PM 0.3 , respectively), far surpassing the normal PLA counterpart (nearly 350 Pa, 89.5 % and 75.8 %). Arising from the respiration-driven charge regeneration mechanisms, passive respiratory monitoring of high sensitivity was demonstrated for BM-PLA8, showing great promise for efficient healthcare under the challenging circumstances.
研究领域:
材料科学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yunshi Liu,Rui Wang,Tong Zhang,Sen Liu,Teng Fei
The development of NO 2 gas sensors is of great importance for air quality monitoring and human health. In this work, In 2 O 3 and zeolitic imidazolate framework-8 (ZIF-8) heterostructures were synthesized and designed as efficient sensing materials for NO 2 detection. The ZIF-8 nanocrystals were uniformly deposited on In 2 O 3 nanofibers (NFs) by using a self-template strategy, where In 2 O 3 /ZnO NFs act as the source of Zn 2+ for the formation of ZIF-8 and as the template. By tuning the amount of Zn 2+ in the composite NFs, different morphologies from In 2 O 3 NFs with minimal ZIF-8 loading to an In 2 O 3 /ZIF-8 core-shell complex were obtained. The optimized In 2 O 3 /ZIF-8 NFs show a remarkably high response to 1 ppm NO 2 (R g /R a = 16.4) and enhanced humidity resistance due to the hydrophobicity of ZIF-8 in comparison with those of the pristine In 2 O 3 NF sensor (R g /R a = 4.9) at 140 °C. The gas sensing mechanism of In 2 O 3 /ZIF-8, which is based on electron transduction, surface chemistry, and the functional interface between the loaded ZIF-8 and In 2 O 3 matrix, was proposed. Additionally, the large number of pores, which were formed by the in situ conversion of ZnO grains in the matrix, ensures that all parts of the In 2 O 3 NFs are accessible to gases. This facile strategy paves the way for the design of metal oxide/MOF complex architectures with tunable metal centers for various applications, including gas sensing.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Beibei Sun,Cheng Zeng,Suyun Deng,Yuewen Gu,Lei Gan,Huajun Yang
The separation of C2H2/CO2 under highly humid conditions by using metal–organic frameworks (MOFs) is extremely challenging because water vapor would reduce the C2H2 adsorption capacity or even degrade the structure of MOFs. In this work, a zirconium zeolitic metal–organic framework (NNM-5) with a small aperture and large cavities exhibits commendable C2H2/CO2 selectivity (16.6 at 298 K and 1 bar) and a high uptake ratio (3.13 at 298 K and 1 bar). More importantly, NNM-5 could maintain at least five breakthrough cycles under highly humid conditions (around 100% RH) without performance degradation compared to that under dry conditions. Our studies indicate that the kinetic mechanism is the key to excellent separation performance under highly humid conditions based on the fact that the material is hydrophilic with a high water uptake, but the diffusion rate of H2O is 2 orders slower than that of C2H2 and CO2 in NNM-5.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Ahua Xu,Shupeng Sun,Xinlei Li,Nan Wang,Xiaoyu Wang,Huajin Tao,Yitian Ma,Zhao Zhang,Baoyu Huang,Xiaogan Li
The analysis of human exhaled gas is crucial for early and noninvasive diagnosis. However, the complex composition and high-humidity of exhaled gas pose significant challenges to the application of gas sensors. This research focuses on the development of a chemiresistive ammonia sensor based on the polyaniline/tin disulfide (PANI/SnS 2 ) heterojunction, which is fabricated by hydrothermal and in-situ polymerization techniques. The sensor demonstrates significantly enhanced gas sensing capabilities manifested by increased responsiveness, improved selectivity, and stability for detecting 0.5–100 ppm ammonia at ambient temperature. Notably, the sensor exhibits a marked enhancement in response at high humidity levels. When exposed to 30 ppm of ammonia, the sensor's response value increases by 167 % at a relative humidity (RH) of 80 %, compared to 128 % at 50 % RH. This significant improvement can be attributed to the unique interaction between water molecules and the sensor material, which enhances the overall charge transfer processes at the PANI/SnS 2 interface. Furthermore, in-situ techniques as well as theoretical calculations are utilized to gain insight into the sensitization mechanism. The proposed PANI/SnS 2 heterojunction sensor shows great promise for applications in high-humidity environment at ambient temperature.
研究领域:
材料科学
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医学检测
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化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2024
·Vol. 12
·期 3
·43
·
IF 3.7
Yi Li,Boyu Zhang,Juan Li,Zaihua Duan,Yajie Yang,Zhen Yuan,Yadong Jiang,Huiling Tai
The NH3sensor is of great significance in preventing NH3leakage and ensuring life safety. In this work, the Pd-decorated ZnO hexagonal microdiscs are synthesized using hydrothermal and annealing processes, and the gas sensor is fabricated based on Pd-decorated ZnO hexagonal microdiscs. The gas-sensing test results show that the Pd-ZnO gas sensor has a good response to NH3gas. Specifically, it has a good linear response within 0.5–50 ppm NH3at the optimal operating temperature of 230 °C. In addition, the Pd-ZnO gas sensor exhibits good repeatability, short response time (23.2 s) and good humidity resistance (10–90% relative humidity). This work provides a useful reference for developing an NH3sensor.
研究领域:
材料科学
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传感器技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 21
·10397-10408
·
IF 3.3
Ning Gao,Xuanyu Gu,Jining Liu,Mengjie Fan,Yingwen Chen
At present, it is challenging to improve the activity and humidity resistance of ozone catalysts. Herein, an integrated MnOx–Al2O3 aerogel was prepared by a sol–gel method in this study, and its application in catalytic ozonation of toluene was explored preliminarily. Compared with the MnOx–SiO2 aerogel and impregnation catalysts (MnOx–silicalite-1 and MnOx–γ-Al2O3), the MnOx–Al2O3 aerogel exhibited superior performance in toluene removal and enhanced ozone utilization efficiency under optimal conditions (room temperature, O3 : C7H8 = 14 : 1, GHSV = 45 000 h−1 and 120 ppm C7H8). After reacting for 360 min, the 5 wt% MnOx–Al2O3 aerogel still showed stable catalytic ability, with the efficiency of toluene removal and ozone degradation maintained at 64.1% and 62.7%, respectively. Based on SEM characterization, the MnOx–Al2O3 aerogel demonstrated low MnOx agglomeration. From XPS and NH3-TPD analyses, it was found that the catalyst had a high content of Mn3+/Mn, Oβ/O, oxygen vacancies and acid sites, which was positively related to ozone degradation. Among them, an increase in the number of weak acid and moderately strong acid sites could prolong the life of active oxygen, which was the key to promoting the deep oxidation of toluene effectively. In addition, the MnOx–Al2O3 aerogel exhibited remarkable load-adjustability and humidity resistance. Therefore, the development of aerogel catalysts for catalytic ozonation of toluene is an effective strategy to alleviate the current ozone catalyst problem.
研究领域:
环境科学
·
催化材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Sufaid Shah,Shahid Hussain,Salah Ud Din,Abdulnasser M. Karami,You Tianyan,Mingsong Wang,Guiwu Liu,Guanjun Qiao
The current study, accurately designed and created a two-dimensional (2D) structure of SnO 2 nano-flowers and In 2 O 3 nanoparticles using a simple hydrothermal technique and sol-gel method, respectively. On the outer surface of SnO 2 nanoflowers the In 2 O 3 nanoparticles were uniformly growing, clearly revealed by field emission scanning electron microscopic. Besides, crystal phase structure, surface area and elementals composition were characterized by XRD, BET, TEM, EDS, XPS and the gas sensing properties of In 2 O 3 @SnO 2 NFs. The results exhibited that 2 wt% In 2 O 3 @SnO 2 NFs sensor is highly sensitive to NO 2 , the response (R g /R a ) to 30 ppm NO 2 is 94.5, and at 50 ppb the response measured 0.61 at 150 °C, the response time is 32 and 51s, respectively, along with good moisture resistance. Besides along with excellent selectivity, long-term stability, and relative humidity (RH) in high-humidity environment, the 2 wt% In 2 O 3 @SnO 2 NFs still maintain high response 91 at 30 ppm. More importantly, at room temperature the response was (Rg/Ra = 1.01) at detection limit 300 ppb towards NO 2 , which could use be for trace NO 2 gas detection. The large specific surface areas of SnO 2 , the abundance of oxygen species adsorbed on the surface, the distinctive electron transformation between heterojunction materials, and high electron transmission channel of SnO 2 and In 2 O 3 transition layer were all considered to have a synergistic effect thatin2 contributed to excellent sensing properties of In 2 O 3 @SnO 2 NFs.
研究领域:
材料科学
·
环境监测
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 34
·2400750
·
IF 18.5
Zhuli Hou,Tao Liu,Mingyang Li,Yanniu Xu,Xunxiao Wu,Shuwen Luo,Chenchen Cai,Yakun Mou,Yuhang Qiu,Shuangxi Nie,Dengjun Lu
Non-contact intelligent sensing technology is a key player in the data acquisition and environmental monitoring framework of the Internet of Everything, laying the groundwork for the realization of highly integrated intelligent network systems. However, environmental factors continue to be a major challenge in the process of real-time monitoring and feedback of objects, constraining the stability and accuracy of the sensing signals. In this study, a hierarchical spatial assembly strategy is implemented to effectively integrate an intermediate energy storage layer with superhydrophobic surfaces (CA = 162 ± 2.5°), resulting in the development of a moisture-resistant triboelectric structural materials with stable monitoring and tracking capabilities. The moisture-resistant self-powered sensor constructed from this triboelectric structural material operates effectively in extreme humidity conditions (99% RH) with a full-scale output retention rate of 95.2%, and is capable of accurately sensing human activity from the distance of 3 m. Importantly, the sensor can also effectively detect vehicle states during operation and perform real-time monitoring of the vehicle's surrounding environment. This study not only overcomes the long-standing challenges of accuracy and stability in high humidity for sensors but also advances the development of sustainable, interconnected intelligent systems for the Internet of Everything in extreme environmental conditions.
研究领域:
材料科学
·
传感器技术
·
物联网
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Junhui Wu,Baoping Yang,Jiahao Zhou,Ming Zhong,Yong Ding,kun zhao,Ye Yuan
Triboelectric nanogenerators (TENGs) are capable of effectively scavenging ambient tiny mechanical energy and converting it into electrical energy, offering significant potential for applications in self-powered sensing and electrical energy storage systems. However, the practical utility of TENGs in high-humidity environments is severely restricted due to the detrimental effects of moisture. Herein, we have fabricated a TENG utilizing a CAU-10-(SO3H)0.08(OH)0.92/polyvinyl chloride (PVC) composite film as the negative triboelectric layer and Al foil as the positive triboelectric layer, which exhibits the ability to sustain stable output voltage and current even in highly ambient humidity conditions. At a relative humidity (RH) of 20%, the 2 wt%-CAU-10-(SO3H)0.08(OH)0.92//PVC composite film-based TENG achieved an open-circuit voltage (Voc) of 318 V, a short circuit-current (Isc) of 30 μA, a short-circuit charge transfer (Qsc) of 77 nC and a peak power of 2.69 mW. The device still maintains stable output voltage and current signals even at 90% RH. There is no obvious decline in the output voltage of the TENG after continuous working for about 36,000 operational cycles. Through a transformer and a rectifier circuit, the TENG was capable of charging a 10 mF capacitor to 2.7 V in 3.48 h, which was subsequently employed for water electrolysis to generate hydrogen. After 30 electrolysis cycles, the system produced 54 µL of H2 at a rate of 143.6 µL/h/m². This work offers a reference for the development of CAU-10-(SO3H)0.08(OH)0.92-based composites with humidity resistance, which is essential for the application of TENGs in high-humidity environments.
研究领域:
材料科学
·
能源技术
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xi Yin Yang,Jiang Long Pan,Sha Sha Wang,Dong Chen,Yan Chun Wang,Shi Kun Wang,Limao Cairang,Zhen Xing Zhang,Geng Zhi Sun,Xiao Jun Pan,Jin Yuan Zhou
Air humidity is a major factor that degrades the performance and long-term stability of metal-oxide-semiconductor (MOS) based gas sensors. In this work, we propose an encapsulation strategy by coating a mesoporous silica molecular sieve (SBA-15) on rare earth doped tin oxide (RE-SnO 2 ) nanofibers for humidity-resistant hydrogen detection. In this design, the hydrophobic SBA-15 sieve layer effectively blocks the water molecules without affecting hydrogen diffusion, while the RE dopant greatly improves the responsivity and lowers down the operating temperature of the sensors, As a result, the Er-SnO 2 /SBA-15 and Tb-SnO 2 /SBA-15 sensors respectively show the maximum response values of 27.71 and 33.68 (to 10 ppm hydrogen at 280 °C, 4.67 and 5.67 times that of the bare SnO 2 ones, respectively), short response/recovery time (< 1.0 s / < 1.0 s), as well as a low limit of detection for hydrogen (200 ppb) and a good gas selectivity . Under the protection of the SBA-15 sieve layer, the response retention of the sensors is significantly improved when the humidity increases from 25% to 85% RH (Er-doping, from 38.8% to 60.0%; Tb-doping, form 25.6–57.8%). Besides, further analysis on enhancement mechanism of response indicates that the SBA-15 coating contribute about 1/3 of the response enhancements via its own hydrogen physical adsorption capacity and the induced oxygen vacancies during the calcination processes.
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
危险品化学品经营许可证（带存储）