NANOTECHNOLOGY
·
2021
·Vol. 32
·期 47
·475506
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IF 3.874
Jiawen Shi,Sen Liu,Peng Zhang,Ning Sui,Shuang Cao,Tingting Zhou,Tong Zhang
Methane (CH4) gas sensors play an important role in industrial safety and detection of indoor gas quality. In general, metal oxide semiconductor sensing materials with nano-structure have high responses to the target gas. However, the sensor resistance is usually very high. Considering the practical application, it is vital to reduce base resistance and improve sensitivity for gas sensors. Herein, Pd-doped SnO2 nanoparticles were prepared as the basis material by a simple sol-gel method. In order to adjust the resistance, the pentavalent metal element (Sb) was introduced via a simple doping route. As CH4 sensing layers, the prepared SnO2-sensors doped with Pd and Sb exhibited the most obvious resistance reduction effect. Meantime, excellent sensing performances including high response, fast response/recovery time, excellent reproducibility and great stability were also obtained. In-depth research has shown that the ability to reduce resistance depends on the effective internal doping of cation with high valence. The enhanced sensing capability can be attributed to the 'synergistic effects' including catalytic effects of novel metals, increased oxygen vacancies and decreased band gap energy. This work can provide a new opportunity to design metal oxide sensing materials with low resistance and high sensitivity.
研究领域:
材料科学
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传感器技术
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纳米科技
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Yukun Wang,Hanyin Zhang,Renzong Hu,Jiangwen Liu,Teunis van Ree,Haihui Wang,Lichun Yang,Min Zhu
A ternary composite of Fe 3 O 4 /SnO 2 /rGO has been synthesized via a facile one-step hydrothermal method . In the composite, rGO serves as a conductive and robust matrix, Fe 3 O 4 and SnO 2 nanoparticles are uniformly loaded on the rGO nanosheets without aggregation, due to the space-confine effect of the simultaneous nucleation and growth of Fe 3 O 4 and SnO 2 nanocrystallites . As an anode material for lithium-ion batteries, the Fe 3 O 4 /SnO 2 /rGO nanocomposite exhibited a reversible capacity of 947 mAh g −1 at a current density of 200 mA g −1 in the first cycle, and maintained 831 mAh g −1 after 200 cycles. The cyclic performance and rate capability of the Fe 3 O 4 /SnO 2 /rGO are markedly improved compared with the binary counterparts of FeO x /rGO and SnO x /rGO obtained in the control experiment, as a result of enhanced structural stability and kinetics for charge and Li + transfer due to the synergetic effect in the ternary composite.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Peng Wu,Yi Li,Song Xiao,Junyi Chen,Ju Tang,Dachang Chen,Xiaoxing Zhang
As a novel eco-friendly gas insulation medium, perfluoroisobutyronitrile (C 4 F 7 N) has been utilized in various gas insulated equipment. Considering the biological toxicity of C 4 F 7 N, it is of great engineering significance to develop highly sensitive sensors for leakage detection scenarios. Herein, we fabricated the first SnO 2 nanoparticles based highly sensitive C 4 F 7 N gas sensor that realized a superior response of 65.01% within 21 s for 50 ppm C 4 F 7 N exposure and a detection limit of 0.25 ppm. Meanwhile, successive response-recovery tests were performed to confirm its durability and stability. We also explored the sensing mechanism of SnO 2 nanoparticles towards C 4 F 7 N and explained the superior sensing performance compared with other gases based on the density functional theory . It was found that the O vacancy demonstrates strong interaction with the -CN group in C 4 F 7 N that promotes the detection response, which was also confirmed by sensing experiments for SnO 2 with different O vacancy density. We believe this paper provides convincing support for lowering the potential operation risk brought by C 4 F 7 N in electrical engineering and the application scenarios of SnO 2 based gas sensors.
研究领域:
材料科学
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电气工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Rui Xue,Xiaowen Zhou,Shuai Peng,Pengfei Xu,Siliang Wang,Chao Xu,Wei Zeng,Yi Xiong,Dong Liang
To explore the attractive structural and semiconductive properties of two-dimensional bismuthene, exquisite heterojunctions with less interfacial mismatch between bismuthene and SnO2 nanoparticle are coincidentally architected by a low-temperature procedure, based on a unique self-adaptive attribute of the two-dimensional structure of bismuthene, in combination with the lattice-matching attribute of adjacent lattice-spacing between bismuthene and SnO2. When applied in perovskite solar cells as an electron transport layer, the bismuthene–SnO2 composite layer turns smoother and more transparent and endows higher crystallinity to the upper perovskite layer. Depending on highly conductive bismuthene along with semiconductive bismuthene–SnO2 heterojunctions, the energy band of the integral composite layer is upshifted and the interfacial resistance between the composite layer and the perovskite layer is reduced, effectively accelerating the electron extraction without declining the hole-blocking, in comparison with the pure SnO2 layer. A higher statistical average power conversion efficiency of 18.75% is achieved, compared to the counterpart of 17.35%, and it also maintains a high stability of almost 80% of its initial efficiency even in an ∼5% relative humidity environment for more than 800 h, in contrast to its counterpart, which maintains just 50% efficiency retention.
研究领域:
材料科学
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光伏技术
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纳米技术
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Yaqing Zhang,Zhimin Yang,Liang Zhao,Teng Fei,Sen Liu,Tong Zhang
As promising sensing materials, reduced graphene oxide (RGO)-based nanomaterials have drawn considerable attention in the fields of gas monitoring owing to their low operating temperature. However, constructing RGO-based room-temperature gas sensors possessing ppb-level limit of detection with high sensitivity remains challenging. In this work, a series of highly sensitive NO 2 sensors were fabricated using α-Fe 2 O 3 and SnO 2 co-decorated RGO hybrids (designated as α-Fe 2 O 3 /SnO 2 -RGO) as sensing materials. They were rationally synthesized by a one-pot hydrothermal method. Compared to SnO 2 modified RGO hybrids (SnO 2 -RGO with bandgap of 3.88 eV), the bandgap energy of α-Fe 2 O 3 /SnO 2 -RGO hybrids (3.53 eV) was reduced by adding α-Fe 2 O 3; the narrower bandgap facilitated the sensing materials to release more electrons and form more oxygen ions at room temperature. Besides, the high carrier migration of RGO, which served as continuous phase, identical structure with ultrasmall particle size of α-Fe 2 O 3 and SnO 2 (about 3–6 nm), and abundant chemisorbed oxygen species on the surface (20.8%) of the sensing materials, as well as their suitable bandgap (3.53 eV) in the sensing materials, significantly improved NO 2 response at room temperature. Among the sensors fabricated, α-Fe 2 O 3 /SnO 2 -RGO-15-based NO 2 sensor had the highest response of 7.4 with a short response time of 59 s towards 1 ppm NO 2 ; it could even reach a response of 2.6 towards 100 ppb NO 2 . Notably, α-Fe 2 O 3 /SnO 2 -RGO-15 sample has excellent capability to recognize NO 2 , where the response value (7.4) towards 1 ppm NO 2 is about 7 times higher than that of 100 ppm ammonia and common volatile organic compounds (formaldehyde, toluene, ethanol and acetone). Such NO 2 sensor has superior repeatability with negligible response deviation towards 1 ppm NO 2 for four reversible cycles. This makes it to have a great potential application in the field of NO 2 detection.
研究领域:
材料科学
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环境监测
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 2
·1756-1764
·
IF 3.086
Jiuyu Liu,Xin Li,Xiang Chen,Hao Niu,Xiao Han,Ting Zhang,Huiming Lin,Fengyu Qu
SnO2/In2O3 hetero-nanotubes (SINs) were successfully produced using a novel coaxial-electrospinning method with pure polyvinylpyrrolidone (PVP) plus Sn/In salt as the outer shell and PVP as the inner component. After the calcination process, these SnO2/In2O3 hetero-nanotubes with diameters of 80–120 nm and lengths of several micrometers were obtained. All the SINs are assembled by plenty of nanoparticles (10–50 nm), bringing about abundant porous structures as well as large surface areas (up to 56 m2 g−1). These SnO2/In2O3 hetero-nanotubes exhibit high response (400 at 500 ppm), low detection limit (down to 250 ppb), fast response (60 s)/recovery (97 s), good retention (94.68% for 30 day) and excellent selectivity toward formaldehyde. Gas sensing mechanism has been discussed by adjusting the amount of the two components. Based on detail investigations, it can be concluded that the enhanced response performance lies in the particle size, porous structure, surface area, and component ratio of the heterostructure.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Yang Li,Hairun Ma,Wenyu Xie,Jiahao Liang,Min Li,Shaohui Guo,Guangxu Yan
The short service life and low catalytic activity of electrodes are the major bottlenecks limiting the practical applications of current electrocatalytic oxidation technology in wastewater treatment. In this study, a novel Ti/SnO 2 -Sb-Nd-Pt electrode loading TiO 2 nanotube (TiO 2 -NTs) array was proposed and prepared. The optimized TiO 2 nanotube (TiO 2 -NTs) arrays provided abundant anchoring sites for SnO 2 -Sb-Nd-Pt active coating and improved the bonding strength between the Ti matrix and the SnO 2 -Sb-Nd-Pt active coating as a mediator, as a result, higher electrocatalytic performance and stability. The nitrobenzene (NB) removal and service life were significantly higher in Ti/TiO 2 -NTs/SnO 2 -Sb-Nd-Pt (91.08 % and 4381.9 days) when compared to Ti/SnO 2 -Sb-Nd-Pt (80.61 % and 1151.2 days). In addition, the outstanding electrocatalytic performance of Ti/TiO 2 -NTs/SnO 2 -Sb-Nd-Pt with an oxygen evolution potential of 2.03 V and total voltametric charge of 5.88 mC cm −2 makes it a promising candidate for future industrial applications. These findings will lay a solid foundation for broadening the applications of well-defined TiO 2 -NTs arrays prepared via the two-step anodization.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Shao Hongyun,Huang Minxuan,Fu Hao,Wang Shaopeng,Wang Liwei,Lu Jie,Wang Yinghui,Yu Kefu
Metal oxide hetero-nanostructures have widely been used as the core part of chemical gas sensors. To improve the dispersion state of each constituent and the poor stability that exists in heterogeneous gas sensing materials, a uniaxial electro-spinning method combined with calcination was applied to synthesize pure SnO2 and three groups of WO3/SnO2 (WO3 of 0.1, 0.3, 0.9 wt%) hetero-nanofibers (HNFs) in our work. A series of characterizations prove that the products present hollow and fibrous structures composed of even nanoparticles while WO3 is uniformly distributed into the SnO2 matrix. Gas sensing tests display that the WO3/SnO2 (0.3 wt%) sensor not only exhibits the highest response (30.28) and excellent selectivity to acetone vapor at the lower detection temperature (170°C), 6 times higher than that of pure SnO2 (5.2), but still achieves a considerable response (4.7) when the acetone concentration is down to 100 ppb with the corresponding response/recovery times of 50/200 s, respectively. Such structure obviously enhances the gas sensing performance toward acetone which guides the construction of a highly sensitive acetone sensor. Meanwhile, the enhancement mechanism of such a special sensor is also discussed in detail.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiangqiang Zhao,Dachang Liu,Zhipeng Li,Bingqian Zhang,Xiuhong Sun,Zhipeng Shao,Chen Chen,Xiao Wang,Lianzheng Hao,Xianzhao Wang,Caiyun Gao,Yimeng Li,Panyu Chen,Xiaoxu Zhang,Shuping Pang,Guanglei Cui,Li Wang
The material and microstructure of the carrier-selective layers in the perovskite solar cells are important to determining their efficiency and stability. Planar SnO 2 is the most commonly used inorganic electron transport layer, but there are few reports of its mesoporous structure because of the degradation of hole-blocking property after high temperature sintering. Here, the chemical bath deposition method was optimized to realize low-temperature in-situ deposition of mesoporous SnO 2 layer on FTO substrates. On one hand, the increased interface contact area improves electron injection from the perovskite layer to the SnO 2 , yielding an impressive increase of the power conversion efficiency from 22.09% to 24.11%. And on the other hand, thanks to the increased mechanical strength of the interface, the device with mesoporous SnO 2 retains 90% of its initial power conversion efficiency after 1000 h operation under continuous one-sun illumination.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Yipeng Zang,Liping Li,Xiaoguo Li,Rui Lin,Guangshe Li
A series of novel composites g -C 3 N 4 /SnO 2 were first synthesized using a facile two-step process. Through systematic sample characterization, it is demonstrated that all composites consist of two components: g -C 3 N 4 with a low specific surface area and SnO 2 nanoparticles with a large specific surface area. Within the composites, component of SnO 2 nanoparticles dispersed well onto the component g -C 3 N 4 with a clear interface between each other. The interactions between both components are strong, as confirmed by variations in binding energies and lattice parameters. A synergistic collaboration is achieved for the composites, as contributed by surface adsorption of organics from π–π conjugation of component g -C 3 N 4 , improved separation efficiency of photo-generated carriers from interfacial interactions between both components, and increased surface area from component SnO 2 nanoparticles. As a consequence, these composites exhibit a significantly enhanced photocatalytic activity towards MO degradation under visible light irradiation. The optimum photocatalytic performance is achieved at 47.5 wt% SnO 2 , showing a reaction kinetic constant of 0.0078, which is much higher than those of components g -C 3 N 4 and SnO 2 . With the unique synergistic collaboration, the optimized composite with Pt additives is also successfully applied to high-efficiency production of hydrogen from water splitting under visible light irradiation.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Feihu Li,Junjie Jing,Jinkun Li,Shuni Li,Siyu Ye,Xinru Song,Zili Zhan,Yeguang Zhang
The development of metal oxide semiconductor-based chemiresistive gas sensors with ultra-fast response/recovery for toxic and flammable gases is of great importance, but still challenging. Here, ZnO-SnO 2 heterojunction three-dimensional (3D) inverse opal photonic crystal balls (IOPBs) were fabricated based on rapid and liquid waste-free spray drying. The spherical three-dimensional (3D) ordered macroporous skeleton can provide more active sites and faster gas diffusion channels. Furthermore, the n-n heterojunction established by ZnO and SnO 2 is favorable for electron transport . The response (Ra/Rg) of IOPBs to 50 ppm acetone reaches 40.3 at an optimal operating temperature of 260 °C when the Zn/Sn atomic ratio is 1:4, which is 5 times higher than that of the pure SnO 2 sensor. Response/recovery time also reduces from 23/47 s for pure SnO 2 to 6/10 s. In addition, the IOPBs gas sensors also exhibit good selectivity and excellent long-term stability. This work provides a straightforward and versatile synthetic route for the preparation of 3D IOPBs to explore novel gas sensors with ultra-fast response speed.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jie Wan,Chengao Liu,Xiaoxia Wang,Huajing Wang,Lu Tang,Zhenming Du,Wulin Song,Dawen Zeng
Safety problem caused by the leakage of electrolyte in lithium-ion batteries (LIB) have become a critical hot issue. However, since the main components of LIB electrolyte, such as dimethyl carbonate (DMC), are volatile or redox, trace electrolyte leakage is difficult to detect. Therefore, in order to realize early detection of electrolyte leakage and real-time monitoring of LIB health, here we report a success of DMC gas detection by MOS sensor based on Co/Pd-doped SnO 2 nanomaterial for LIB health monitoring. In detail, the sensor showed high response to DMC when compared to interfering gases. Especially, the sensor could detect DMC down to the ppb level (the response value of the 500 ppb DMC is about 1.6). The response and recovery time for 1 ppm DMC were about 66 s and 240 s, respectively. The response of the sensor was obvious even when the leakage levels were as low as only 0.1 μL electrolyte. Furthermore, in the simulated electrolyte leakage via LIB penetration experiment, the sensor successfully exhibited an instant response, which proved that this work effectively provides a new approach for LIB real-time health and safety monitoring.
研究领域:
材料科学
·
传感器技术
·
电池安全
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）