MATERIALS & DESIGN
·
2022
·
IF 9.417
Shikun Hou,Ying Wang,Feng Gao,Fengyuan Wang,Hua Yang,Fei Jin,Gongxun Bai,Zhihai Cao,Yunchen Du
Developing highly efficient flexible microwave absorber is of great significance for wearable electronics and aerospace applications. In this work, the fusiform SnO 2 nanocrystals film in situ grown on flexible carbon fiber cloth is rationally designed and fabricated through combining air calcination and hydrothermal synthesis. X-ray photoelectron spectrum confirms fusiform SnO 2 nanocrystals film and carbon fiber cloth are effectively integrated with strong chemical bonds of C O Sn. The as-prepared composite exhibits strong reflection loss of −49.1 dB (2.6 GHz) and wide effective absorption bandwidth of 5.8 GHz (11.6–17.4 GHz) with a thin matched thickness of 1.6 mm, surpassing to pure carbon fiber cloth and many SnO 2 /carbon-based microwave absorbers. The efficient performance originates from well-matched characteristic impedance and multifarious electromagnetic attenuation mechanisms, i.g. , dipole orientation polarization, interfacial polarization relaxation, conductive loss, and multiple reflections/scatterings. Especially, differential charge density calculation reveals the uneven charge distribution at SnO 2 /C interface, which is believed to remarkably enhance interfacial polarization relaxation and contribute to microwave absorption. Our results illustrate that the ingenious integration of nanomaterials on carbon fiber cloth promises a way to achieve efficient and flexible microwave absorbers.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qiumei Wang,Lihao Zhou,Shaobo Li,Xiao Chang,Xianghong Liu,Jun Zhang
The unique electronic and chemical properties of metal oxide heterostructures are critical to the development of room temperature (RT) sensors. In this work, we report the design of In 2 O 3 /SnO 2 heterostructures based on atomic layer deposition (ALD), which regulates the energy band structure of the material and promotes the electron transfer, thus enhancing the adsorption of target gases. The sensor based on In 2 O 3 /SnO 2 demonstrates outstanding sensing performance at RT with an extreme response of 2900 to 10 ppm NO 2 , which to our knowledge outperforms the reported metal oxide sensors, as well as a detection limit of 61 ppb. Density functional theory (DFT) calculations show that the charge transfer (0.494 e) and interaction energy (2.19 eV) between In 2 O 3 /SnO 2 and NO 2 are significantly enhanced. This work highlights the critical function of heterostructured materials in enhancing the sensing capabilities of semiconductors, providing some hints for the design of ultrasensitive NO 2 sensors.
研究领域:
材料科学
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传感器技术
·
计算化学
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DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 12
·5073-5084
·
IF 2.8
Zhang Xiangyang,Xin Yu,Shen Qianyun,Wang Feifei,Xiao Wei
A facile and feasible strategy is carried out combined with the subsequent heat treatments to encapsulate SnO 2 /Cu 3 Sn nanoparticles into N-doped carbon nanofibers (CNFs) by electrospinning to fabricate the SnO 2 /Cu 3 Sn@CNFs nanofibers as anode materials for lithium-ion batteries. The one-dimensional composite nanofibers are well interconnected with each other and randomly intertwined to construct the distinctive three-dimensional networks, which not only shorten Li + transfer pathways and accelerate Li + diffusions in the axial direction, but also improve the electronic conductivity of whole composite electrodes. Furthermore, the fully active SnO 2 phases dominate the lithium storage behaviors of composite electrodes to guarantee the excellent lithium storage capacity, and the relatively active Cu 3 Sn phases play the role of buffer matrixes to accommodate the huge volume expansion of SnO 2 phases. When the dosages of SnCl 2 salts are controlled at 5 mmol, the SnO 2 /Cu 3 Sn@CNFs-5 electrode delivers the excellent comprehensive electrochemical properties, whose initial discharge specific capacity is 1279.1 mAh/g at 100 mA/g and maintains to 560.7 mAh/g after 200 cycles. Moreover, the SnO 2 /Cu 3 Sn@CNFs-5 electrode is endowed with the high-specific capacity of 359.2 mAh/g at 500 mA/g after 1000 cycles and the satisfactory pseudocapacitive contribution of 49.60% at 1.0 mV/s. The new insights into the electrospinning strategy of encapsulating SnO 2 and Cu 3 Sn nanoparticles into CNFs matrixes can contribute to offer a guide for the application of next-generation SnO 2 -based anodes for energy storage devices.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuehua Liu,Qiang Xue,Chunwen Chang,Rong Wang,Qun Wang,Xiaohan Shan
A novel laser-induced graphene (LIG) electrode modified with SnO 2 and CeO 2 nanoparticles (NPs) was created to detect Cd(II) ions via differential pulsed anodic stripping voltammetry (DPASV). Transmission electron microscopy (TEM), scanning electron microscopy (SEM), infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), and contact angle (CA) analyses were used to characterize the physical and electrochemical properties of the electrode. Both the electrochemical activity and adsorption capacity of the carbon electrode were significantly enhanced. Due to the synergistic effects of SnO 2 and CeO 2 NPs, the modification enhanced the transfer of free electrons on the electrode surface, increasing the electrode sensitivity and accelerating the response speed in the detection process. The use of poly-aminobenzene sulfonic acid (p-ABSA) further increased the conductivity of the electrode. The enhanced adsorption energy and electron transfer properties of the modified electrode were also substantiated by density functional theory (DFT) calculations. Parameters such as Sn/Ce ratio, deposition time, number of polymerization cycles of p-ABSA and solution pH were optimized to determine the best detection conditions for Cd(II) ions. Under optimal conditions, our sensor showed a broad linear concentration range (0.1 ∼ 160 μg/L) with a low detection limit (0.01 μg/L). This sensor was also successfully applied for detection of Cd(II) ions in groundwater and tap water. Recovery rates ranged from 94 to 111% with a relative standard deviation (RSD) less than 6.06%. This sensor has good anti-interference ability, reproducibility and stability. Our results provide a promising sensor technique for efficient and rapid in situ monitoring of Cd(II) ions in aquatic environments.
研究领域:
环境科学
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材料科学
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分析化学
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DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Zheng-yun Tian,Hu-wei Miao,Jin-chen Yao,Qing-ru Liu,Wei Liu,Li-qing Bu,Jin-shan Chen,Jun-cai Wu,Hao-yu Jiang,Fa-yu Wu,Yong-xing Liu
An attempt was made to explore the essence of gas selectivity and the miscellaneous reactive sites of stannic oxide, which were obtained by combining oxygen reduction with increasing fluorine and activated by light irradiation. The microstructure and gas-sensing performance of stannic oxide were analyzed using X-ray diffraction, Raman spectroscopy, atomic force microscopy, ultraviolet spectrophotometry, and an electrochemical testing system. The results show that the carbon chain length, functional group position, and functional group species of the measured gas determine the gas-sensing performance of the nanocrystalline SnO2–xFy precipitated from quaternary Zn–O–F–Sn amorphous films by designing the injection sequence of gas in time and space. For 100 ppm gas molecules, the gas response sequences of the SnO2–xFy films are methanol (42.57) > ethanol (30.14) > 1-propanol (15.63) > 2-propanol (12.36) > acetone (10.32). The alcohol gases are apt to be adsorbed on oxygen vacancies to reflect the higher response value and higher optimal temperatures (280 °C), while ketone gases prefer to be adsorbed at the active site produced by fluorine to reflect fast response/recovery speed and lower working temperatures (260 °C).
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DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Limeng Zhang,Yanlong Xia,Zhigang Che,Boxin Jiao,Xu Wang,Jiacheng Shang,Yurong Zhou,Fengzhen Liu
Tin dioxide (SnO2) has emerged as a highly promising candidate for electron transport layers in perovskite solar cells. However, defects in the SnO2 film and at the interface between SnO2 and perovskite often cause serious nonradiative recombination, resulting in the deterioration of the performance of perovskite solar cells. Herein, a synergistic passivation strategy is employed through the introduction of amphiphilic fluorosurfactants (FS-31) into the SnO2 precursor solution, enabling the passivation of defects present both in the SnO2 film and at the interface between SnO2 and perovskite. Moreover, FS-31 is capable of modulating the energy level of the SnO2 film and enhancing the crystalline quality of the wide-band-gap perovskite, thereby minimizing residual lead iodide. Thanks to the positive effects of FS-31, the n–i–p type wide-band-gap perovskite (1.68 eV) solar cells achieve a champion power conversion efficiency (PCE) of 20.92%, an open circuit voltage (VOC) of 1.24 V, and a minimal VOC deficit of 0.44 V. Furthermore, this simple strategy provides strong support for the preparation of high-efficiency n–i–p perovskite/silicon tandem solar cells.
研究领域:
光伏技术
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材料科学
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可再生能源
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半导体器件
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纳米技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Bingchen Zhu,Weihao Fang,Jia Yan,Yue Kang,Yi Tian,Kunmei Yang,Jiazhen Zhang,Yingping Zhang,Hui Xu,Zhilong Song
The detection of hydrogen sulfide (H2S) in humid environments remains a significant challenge, particularly in wearable gas sensors where humidity, mechanical flexibility, and power consumption are critical constraints. In this study, we introduce a stretchable, humidity-resistant H2S sensor based on microcrumpled SnO2 quantum-wire films, designed for efficient gas detection at room temperature with low-power consumption. The sensor’s architecture enhances gas adsorption by increasing the active surface area while minimizing water accumulation through surface energy modulation. This innovative microwrinkle topology results in rapid (<60 s) detection of H2S with high sensitivity (0.01 to 5 ppm) and excellent selectivity (5.6 times higher than individual interfering gas), even under 80% relative humidity, outperforming current state-of-the-art room temperature sensors. The device exhibits long-term stability with minimal response fluctuations (2.08% relative standard deviation) over 30 days of continuous testing. Furthermore, integrated into a flexible platform, it enables real-time, wireless H2S monitoring during dynamic human motions, as demonstrated in simulated industrial environments. This work provides a robust solution to the environmental challenges that hinder the development of reliable wearable gas sensors.
研究领域:
材料科学
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传感器与传感技术
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环境监测
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可穿戴电子
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纳米材料
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Junfei Liang,Zhi Cai,Yu Tian,Lidong Li,Jianxin Geng,Lin Guo
It is currently very urgent to develop flexible energy storage devices because of the growing academic interest in and strong technical demand of flexible electronics. Exploration of high-performance electrode materials and a corresponding assembly method for fabrication of flexible energy storage devices plays a critical role in fulfilling this demand. Here, we have developed a facile, economic, and green hydrothermal process to synthesize ultrasmall SnO2 nanocrystallites/nitrogen-doped graphene nanocomposites (USNGs) as a high-performance electrode material for Li-ion batteries (LIBs). Furthermore, using the glass microfiber filters (GMFs) as supporting substrate, the novel flexible USNG–GMF bilayered films have been prepared by depositing the as-prepared USNG on GMF through a simple vacuum filtration. Significantly, for the first time, the flexible USNG–GMF bilayered films have directly been used for assembling LIBs, where the GMF further functions as a separator. The obtained highly robust, binder-free, conducting agent-free, and current collector-free new type of flexible electrodes show excellent LIB performance.
研究领域:
材料科学
·
能源存储
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Haoyi Mou,Yu Xin,Chang Miao,Shuqing Nie,Shuxin Chen,Wei Xiao
Amorphous SnO 2 nanoparticles embedded into a three-dimensional porous carbon matrix labeled as Am-SnO 2 @P-C are precisely customized through a phase separation process of tin salts and polyacrylonitrile/polyvinylpyrrolidone/ N, N -dimethylformamide polymer mixed solution with the presence of deionized water and combining with heat treatments. The targeted composite powders are characterized by X-ray diffraction, X-ray photoelectron spectroscope, transmission electron microscope, and scanning electron microscope, in which amorphous SnO 2 nanoparticles with ultrafine diameters are uniformly distributed across the three-dimensional porous carbon matrix. The Am-SnO 2 @P-C composite electrode can deliver an initial discharge and charge specific capacity of 1557.6 and 1194.4 mAh/g with an initial coulombic efficiency of 76.7 % at 100 mA/g, and the discharge specific capacity can be retained at 886.4 mAh/g after 200 cycles. Moreover, the Am-SnO 2 @P-C composite electrode also exhibits great rate capability, in which the electrode can deliver a reversible capacity of 581.1 mAh/g at the current density as high as 1.0 A/g with a capacity retention of 92.8 % after 500 cycles. Furthermore, the kinetics investigations of pseudocapacitive contributions and electrochemical impedance spectroscopy on the as-prepared composite electrodes demonstrate the fast electrochemical kinetics of the Am-SnO 2 @P-C electrode due to the synergistic effect of the ultrafine size of amorphous SnO 2 nanoparticles and the porous carbon matrix. Those findings and understandings of the SnO 2 based electrodes may offer some a prospective strategy of the metal-oxide based anodes for lithium-ion batteries in the field of energy storages.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 86
·期 2
·479-492
·
IF 1.745
Liu Siqi,Zhou Xiezhen,Han Weiqing,Li Jiansheng,Sun Xiuyun,Shen Jinyou,Wang Lianjun
Ambient-pressure-dried (APD) crack-free Sb-SnO 2 xerogel has been developed through a facile sol-gel approach. Propylene oxide was added into the tin and antimony precursors to cause rapid formation of the wet gel, which was then modified with silica and dried under ambient pressure. A silica modification carried out by soaking the wet gel in TEOS/ethanol solution, in combination with solvent exchange, allowed to avoid the risky and costly supercritical drying (SCD) process. The silica possessed dual-functional effects during the synthesis process as surface silylation agent and underlying silica structure. FT-IR, SAXS, TEM, and nitrogen physisorption analysis revealed a favorable silica dispersion, outstanding specific surface area (254 m 2 g −1 ), pore volume (0.52 cm 3 g −1 ), and ideal pore size (8.75 nm) for the products. The key properties of the APD crack-free Sb-SnO 2 xerogel were compared with that of SCD aerogel at the same synthesis conditions. Finally, the electrochemical behaviors of 3D electrochemical system filled with the as-synthesized materials as particle electrodes were investigated, which with regard to voltammetric charge and polarization impedance. Padding of the crack-free Sb-SnO 2 xerogels yielded a voltammetric charge 2.99 times as large as that of conventional electrochemical system, and decreased the charge transfer resistance from 46.19 to 6.39 Ω, which realize intrinsically enhanced electrochemical performance for 3D electrochemical system.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Jingjing Tian,Mengen Yan,Ran Xu,Jiayang Zhao,Luodan Wang,Weisong Zhang,Yan Guo,Heng Tian,Yonghao Xu
Polymer-based dielectric capacitors are considered as important energy storage components in the electronic devices and power system owing to their high power density, fast charge–discharge speed, and good reliability. However, the increment of leakage current density at elevated temperature and electric field significantly descends the breakdown strength ( E b ) and energy storage density, restricting their application in harsh environments. Herein, we selected ZnO and SnO 2 n-type semiconductors to construct nn-heterojunction ZnO-SnO 2 nanofibers and introduced them into PEI matrix to fabricate the ZnO-SnO 2 /PEI nanocomposite films via solution casting method. By constructing potential barrier at the interface of ZnO and SnO 2 , charge carrier can be captured and constrained in the potential barrier well during the process of carrier transport, effectively hindering the charge conduction in the nanocomposites, and thus suppressing the leakage current density and boosting the E b and energy storage density. As a consequence, nanocomposite film with 0.50 wt% nanofibers demonstrates high E b of 647 MV/m and large discharge energy density ( U d ) of 8.24J/cm 3 at 25 ℃. Even at 150 ℃, superior U d of 6.02 J/cm 3 , high charge–discharge efficiency ( η ) of 83.5 %, high E b of 593 MV/m are realized in the nanocomposite, which are significantly enhanced than that of pure PEI ( U d ∼ 1.98 J/cm 3 , η ∼ 57.5 %, E b ∼ 438 MV/m). The work provides a novel and feasible strategy for developing high-performance polymer-based dielectric capacitors at elevated temperature.
研究领域:
材料科学
·
高分子物理
·
介电材料
·
能源存储
·
纳米复合材料
·
电子器件
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 47
·18524-18531
·
IF 8.262
Mengjie Feng,Shubin Wang,Jiping Yang,Boming Zhang
As one of the most promising structural anode materials, carbon fibers (CF) have gained much attention. One of the central problems in their application is retaining their tensile strength and simultaneously improving their electrochemical properties. Herein, we report reduced graphene oxide/SnO2@carbon fibers (rGO/SnO2@CF) with wrinkled surfaces, fabricated via a simple hydrothermal method followed by heat treatment. This material exhibits prominent tensile properties, improved reversible capacity, excellent cycling stability and significantly enhanced first cycle coulombic efficiency. Compared to the reversible capacity at the 20th cycle, the rGO/SnO2@CF retained 93.6% reversible capacity after 100 cycles at 50 mA g−1, corresponding to a capacity fading of only 0.08% per cycle. The Weibull scale parameter and shape parameter of rGO/SnO2@CF were up to 4.63 GPa and 7.87, respectively. Our measurements revealed that the positive influence of rGO effectively countervailed the negative influence of the hydrothermal process on the tensile strength; the interleaved structure of rGO/SnO2 prevented the dispersion degree of tensile strength from decreasing; the synergistic effect of rGO and SnO2 enhanced the properties of the carbon fibers, including the tensile strength and the electrochemical properties; the formed rGO network structure and bicontinuous electronic transport pathway are in favor of the cycling stability.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）