APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xun Li,Heng He,Tian Tan,Zhihan Zou,Zhanyou Tian,Wanling Zhou,Yuwen Bao,Xiaohong Xia,Yun Gao
Low power consumption is a new emerged requirement for methane sensors long-term working in a gas supervisory control system. Great challenges remain in development of heat free methane sensors based on metal oxide semiconductors (MOS). In this work, Pt-doped SnO 2 (Pt-SnO 2 ) grow on well aligned ZnO nanorod-array to form an inter-staggered double-layer structure on AZO glass by a two-step hydrothermal method, with the annealing temperature being systematically studied. The optimized processing parameters are 1 at% Pt doping content and 700 °C annealing temperature, offering the best sensing response of 3.36 to 800 ppm CH 4 at room temperature. SnO 2 /ZnO without Pt doping shows linear I-V relationship, while the Pt-SnO 2 /ZnO shows a Schottky-like I-V curve with the Schottky barrier height decreases as increasing the CH 4 concentration. The activation energy (Δ E a ) for CH 4 dissociation decreases with increasing the annealing temperature, and the Δ E a of the optimized Pt-SnO 2 /ZnO sample is only one-third of that in the SnO 2 /ZnO. In addition to the piezoelectric polarization electric field in ZnO, the build up Schottky-like barrier and the reduced activation energy via Pt doping and annealing are demonstrated to be efficient for enhancing the methane sensing performance at low operation temperature.
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
·
2023
·
IF 4.5
Wang Ying,Ye Qiufeng,Hang Pengjie,Yao Yuxin,Li Biao,Kan Chenxia,Zhang Daoyong,Yu Xuegong,Yang Deren
Full-inorganic CsPb(I x Br 1- x ) 3 (0 < x < 1) optoelectronic devices have given rise to widespread interest of researchers owing to their excellent photovoltaic properties and promising thermal stability. However, defects at the interface between the electron transport layer (ETL) and the perovskite layer cause the open-circuit voltage ( V OC ) deficiency for inorganic perovskite solar cells (PSC). In this work, Baclofen (BCF), with carboxy group, amidogen group, and Cl in its molecule, is used as an interlayer between SnO 2 and CsPb(I x Br 1- x ) 3 inorganic perovskite. It is proved that the BCF can not only be beneficial for the growth of perovskite film but also act as a passivation layer for the SnO 2 /perovskite (PSK) interface, which significantly improves the open-circuit voltage of PSCs. Finally, a high V OC of 1.31 V and a power conversion efficiency (PCE) of 15.36% are realized for our BCF-treated PSCs.
研究领域:
材料科学
·
光伏技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Kun Li,Yumin Liu,Fuqi Cui,Shichen Song,Cheng Song,Yun Jiang,Shaofu Wang,Wenyan Zhao,Chuanjin Tian,Zhipeng Xie,Chang-An Wang
Planar hole-transport-layer (HTL)-free carbon-based perovskite solar cells (C-PSCs) exhibit notable advantages such as low cost and improved environmental compatibility. However, their practical applications are hindered by a relatively low efficiency and poor stability. The establishment of a buried interface architecture can effectively enhance the long-term stability of the C-PSC devices. Nevertheless, defect generation during perovskite formation and associated nonradiative carrier recombination remain challenges. Herein, we introduce a bidirectional coordination strategy utilizing ammonium acetate (CH3COONH4) to passivate the tin dioxide (SnO2) surface. The CH3COONH4 treatment facilitates SnO2 oxygen vacancy passivation via interactions between CH3COO– groups and Sn4+ cations. Simultaneously, perovskite defects are effectively mitigated by the combination of CH3COO– with uncoordinated Pb2+ and the formation of N–H···I– hydrogen bonds. These interactions provide a promising foundation for perovskite crystal growth and promote vertical crystallization. Additionally, a favorable buried interface between the perovskite and underlying SnO2 layer effectively minimizes nonradiative recombination losses. Benefiting from these merits, C-PSC devices with CH3COONH4-passivated SnO2 achieved a maximum PCE of 15.5% and demonstrated exceptional operational stability, exceeding 1000 h under ambient conditions. This synergistic bidirectional coordination strategy provides an effective route for fabricating efficient and durable C-PSC devices.
研究领域:
材料科学
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光伏技术
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表面化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zengyi Tang,Yamin Liu,Mianyi Xiang,Daxiang Cui,Qichao Li
The detection of volatile organic compounds (VOCs) has numerous applications in environmental monitoring and biomedicine. Metal oxide semiconductor (MOS) gas sensors are widely used in gas detection due to their simple structure, low fabrication cost, and fast response speed. However, MOS gas sensors have broad-spectrum responsiveness to VOCs, making selectivity a challenge. The most commonly used method to obtain selectivity is the E-nose system consisting of multiple sensors. However, the size of E-noses has increased due to the number of sensors with high power consumption and complicated signal processing. In recent years, deep learning has flourished, allowing for accurate discrimination of VOCs and concentration prediction using E-nose consisting of a single sensor. This method significantly reduces power consumption and facilitates portable applications. In this work, we synthesize SnO 2 -ZnO composite oxide and fabricate a E-nose consisting of a single MEMS gas sensor. The response performance of the E-nose to VOCs is stable with a high output signal-noise ratio (SNR). We design a lightweight deep learning model based on SqueezeNet and train it using transfer learning. Linear regression is used to predict the concentration of VOCs. Our work achieves accurate identification and low-error concentration prediction of VOCs, which is valuable for subsequent portable VOC detection systems.
研究领域:
环境科学
·
生物医学工程
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DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Ramarajan Ramanathan,Ashish Kumar,Himamaheswara Rao,Raj Kumar Samudrala
Researchers are actively investigating cost-effective, indium-free n-type transparent conducting oxides (TCOs) for optoelectronic applications. Silver-doped SnO2 (ASO) thin films, fabricated via spray deposition, serve as promising alternative electrodes for dye-sensitized solar cells (DSSCs), where Ag doping optimizes the electrical and optical properties. The structural, morphological, optical, and electrical transport properties of the as-deposited ASO thin films were analyzed using X-ray diffraction, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, UV–vis spectroscopy, and Hall effect measurements to assess phase composition, surface morphology, elemental states, optical behavior, and charge transport characteristics. At 0.4 wt % Ag (ASO4), the film exhibits 88.7% transmittance in the visible range, a wide bandgap of 3.73 eV, and low resistivity (4.26 × 10–4 Ω cm) with a sheet resistance of 18.6 Ω/□, making it a superior TCO candidate. To understand charge transport mechanisms, Arrhenius analysis was used to determine activation energies, while a four-probe method revealed resistance stability up to 400 °C. The power conversion efficiency (PCE) of the DSSC device was effectively optimized using ASO electrodes, where varying Ag concentrations played a crucial role in enhancing efficiency. Notably, the ASO4 film demonstrated a remarkable PCE of 4.69%. Integrating ASO electrodes into DSSCs yielded enhanced PCE, reinforcing their viability as a cost-effective replacement for ITO/FTO electrodes in the next-generation solar technology.
研究领域:
材料科学
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光伏技术
·
薄膜技术
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光电子学
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纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yanhui Sun,Dongye Han,Shupeng Sun,Yuhua Dong,Xiaogan Li,Kehan Qian
The semiconductor-based sensing materials with hollow and heterojunction structures were demonstrated significant advantages in critical performance metrics including sensitivity, operating temperature, and response/recovery time. In this study, the urchin-like dual-shelled ZnO/SnO 2 hollow spheres were effectively fabricated using a two-step hydrothermal approach. Compared with pure ZnO, the prepared ZnO/SnO 2 material exhibits a larger specific surface area, and abundant interface contact sites, showing significant improvements in NO 2 gas detection. Through the formation of hollow ZnO/SnO 2 heterojunctions, the optimal operating temperature has been successfully decreased from 150℃ to 65℃. Additionally, the ZnO/SnO 2 sensor exhibits a response of 449.4–10 ppm NO 2 , which is 8.7 times that of the ZnO-based sensor. Moreover, this sensor demonstrates a fast response/recovery time (47/50 s) and long-term stability of 60 days. Selective tests confirmed the high specificity of the ZnO/SnO 2 sensor to NO 2 gas (S nitrogen dioxide /S ammonia = 345.7). Additionally, the adsorption behaviors of NO 2 on the ZnO/SnO 2 heterojunction and ZnO surface were analyzed using density functional theory (DFT) calculations, providing theoretical insights for optimizing the performance of hollow core-shell structured sensors.
研究领域:
材料科学
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传感器与检测技术
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纳米技术
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气体传感
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半导体材料
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Dan Zhou,Xiaogang Li,Li-Zhen Fan,Yonghong Deng
Tin oxide (SnO 2 ) is regarded as a promising anode material for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to its large theoretical capacity. However, poor electrical conductivity and the weak cyclability resulted from dramatic volume expansion upon cycling process still hinder its practical application. Herein, we report a facile two-step hydrothermal route to encapsulate core–shell structured carbon nanotube (CNT)@SnO 2 composite in a graphene coating with novel three-dimensional (3D) porous framework architecture (CNT@SnO 2 @G) as anode for both LIBs and SIBs. The resultant CNT@SnO 2 @G electrode suggests outstanding lithium and sodium storage performance with large specific capacity, remarkable cycling stability and excellent rate capability. For LIBs, it delivers a high initial discharge capacity of 1400 mAh g −1 at 100 mA g −1 , improved reversible capacity of 947 mAh g −1 after 100 cycles at 100 mA g −1 , and enhanced rate capability of 281 mAh g −1 at 3000 mA g −1 . In addition, sodium storage testing suggests that a high discharge capacity of 323 mAh g −1 after 100 cycles at 25 mA g −1 was achieved. The present unique structural design associated with the remarkable lithium and sodium storage performance ensures CNT@SnO 2 @G as an advanced anode material for rechargeable LIBs and SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 3
·3032-3044
·
IF 2.195
Zhao Rongjun,Wang Zhezhe,Zou Tong,Wang Zidong,Xing Xinixn,Yang Yue,Wang Yude
One-dimensional fiber-like SnO 2 nanomaterials (SnO 2 nanofibers) were prepared by ‘green’ preparation approach that using shaddock peels as bio-templates via a facile hydrothermal method for the first time. The microstructure, morphology, chemical states and specific surface areas were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and N 2 adsorption–desorption, respectively. Results indicating the as-synthesized SnO 2 are fiber-like structures and composed of numerous nanoparticles, and with large specific surface areas (36.50 m 2 g −1 ). The XPS spectra confirms that the existence of adsorbed oxygen (O ads ) on the surface of product, which may lead to the response of gas sensor. The gas-sensing properties of the sensor based on SnO 2 nanofibers for volatile organic compounds (VOCs) were investigated, such as methanol, ethanol, isopropanol, acetone, formaldehyde and n-butanol. The sensor showed high gas response, low detection limit and fast response towards various VOCs gases at the optimal operating temperature of 260 °C. These results demonstrated the potential of using as-synthesized SnO 2 nanofibers for VOCs gases detection. In addition, the possible formation mechanism and the gas-sensing mechanism were also discussed.
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2019
·Vol. 63
·期 2
·207-215
·
IF 5.636
Li Nan,Yan Jin,Ai Yuqian,Jiang Ershuai,Lin Liujin,Shou Chunhui,Yan Baojie,Sheng Jiang,Ye Jichun
Conventional titanium oxide (TiO 2 ) as an electron transport layer (ETL) in hybrid organic-inorganic perovskite solar cells (PSCs) requires a sintering process at a high temperature to crystalize, which is not suitable for flexible PSCs and tandem solar cells with their low-temperature-processed bottom cell. Here, we introduce a low-temperature solution method to deposit a TiO 2 /tin oxide (SnO 2 ) bilayer towards an efficient ETL. From the systematic measurements of optical and electronic properties, we demonstrate that the TiO 2 /SnO 2 ETL has an enhanced charge extraction ability and a suppressed carrier recombination at the ETL/perovskite interface, both of which are beneficial to photo-generated carrier separation and transport. As a result, PSCs with TiO 2 /SnO 2 bilayer ETLs present higher photovoltaic performance of the baseline cells compared with their TiO 2 and SnO 2 single-layer ETL counterparts. The champion PSC has a power conversion efficiency (PCE) of 19.11% with an open-circuit voltage ( V oc ) of 1.15 V, a short-circuit current density ( J sc ) of 22.77 mA cm −2 , and a fill factor (FF) of 72.38%. Additionally, due to the suitable band alignment of the TiO 2 /SnO 2 ETL in the device, a high V oc of 1.18 V is achieved. It has been proven that the TiO 2 /SnO 2 bilayer is a promising alternative ETL for high efficiency PSCs.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Yue Chen,Minghui He,Ning Zhao,Jingming Fu,Hanyu Huo,Tao Zhang,Yiqi Li,Fangfang Xu,Xiangxin Guo
Garnets are promising solid electrolytes for developing solid state Li batteries , owing to their features of relatively high conductivity and stability against lithium metal. However, they show shortcoming of Li penetration through garnets during Li plating and stripping, which limits their practice application. Herein, we present a strategy to solve such problem by coating SnO 2 films on the surfaces of the Li 6 · 4 La 3 Zr 1 · 4 Ta 0 · 6 O 12 pellets. Through conversion reaction of SnO 2 with Li at 200 °C, the nanocomposite layers consisting of crosslinked Li x Sn and Li 2 O are formed between the Li and the Li 6 · 4 La 3 Zr 1 · 4 Ta 0 · 6 O 12 electrolytes. This leads to transition from lithiophobicity to lithiophilicity, thus greatly reducing interfacial resistance from 1100 Ω cm 2 to 25 Ω cm 2 . Furthermore, taking advantage of suppressing volume change of Li x Sn alloy which is about 260%, the intermediate layers maintain integrity under the current densities of 0.2 mA cm −2 for 650 h cycles. In addition, the critical current density of Li/SnO 2 -Li 6.4 La 3 Zr 1 · 4 Ta 0 · 6 O 12 -SnO 2 /Li can be as high as 1.15 mA cm −2 . As a proof-of-concept, this effective interface modification based on conversion reaction method contributes to a useful way of solving the Li/garnet interface problem and promoting the solid state Li batteries development.
✓ 已验证
DOI
高影响因子
Small
·
2018
·Vol. 14
·期 17
·1703818
·
IF 9.598
Zhi Chen,Dangui Yin,Ming Zhang
Sandwich-like MoS 2 @SnO 2 @C nanosheets are prepared by facile hydrothermal reactions. SnO 2 nanosheets can attach to exfoliated MoS 2 nanosheets to prevent restacking of adjacent MoS 2 nanosheets, and carbon transformed from polyvinylpyrrolidone is coated on MoS 2 @SnO 2 , forming a sandwich structure to maintain cycling stability. As an anode for sodium-ion batteries, the electrode greatly deliverers a high initial discharge specific capacity of 530 mA h g −1 and maintains at 396 mA h g −1 after 150 cycles at 0.1 A g −1 . Even at a large current density of 1 A g −1 , it can hold 230 mA h g −1 after 450 cycles. Besides, as an anode for K + storage, the electrode also shows a discharge capacity of 312 mA h g −1 after 25 cycles at 0.05 A g −1 . This work may provide a new strategy to prepare other composites which can be applied to new kind of rechargeable batteries.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2012
·Vol. 47
·期 11
·3277-3282
·
IF 2.105
Jing Bo Zhang,Xiao Ning Li,Shou Li Bai,Rui Xian Luo,Ai Fan Chen,Yuan Lin
Well-crystallized one-dimensional (1D) SnO 2 nanobelts were in situ prepared using a simple water-assisted chemical vapor deposition (CVD) method. The small Sn particles with Au-modifications were used as source materials instead of big size Sn grains to ensure the high yield of SnO 2 belts. The Au layer was modified on the small Sn particles by treating Sn powders in HAuCl 4 solution combined with the UV irradiation. The as-prepared SnO 2 nanobelts were characterized by SEM, HRTEM, XRD, EDS and XPS. These results indicate that the growth temperature plays an important role in controlling the length-to-width ratio of nanobelts. The length-to-width ratio decreases with the growth temperature from 850 °C to 1000 °C. The nanobelts prepared at 850 °C shows a single-crystalline tetragonal rutile phase with a high length-to-width ratio (approximately tens of microns in length and 40–70 nm in width). However, below 850 °C, nanobelts cannot be formed. The as-prepared nanobelts exhibited excellent sensing properties compared with SnO 2 nanoparticles and high sensing selectivity towards NO 2 . The high sensing selectivity to NO 2 is attributed to the oxygen vacancies presenting in the as-prepared nanobelts.
研究领域:
材料科学
·
纳米技术
·
传感器学
·
无机化学
·
半导体材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）