COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Chengqian Duan,Jianbin Zheng
A porous coralloid nanocomposite termed as Polyaniline/tin dioxide (PANI/SnO 2 ) is designed based on the p-n junction and prepared by a method of an in-situ chemical polymerization, which is constructed as an enzyme-free sensor for nitrite (NO 2 − ) in aqueous solution. The structure and morphology of the proposed nanocomposite has been characterized by Fourier transform infrared (FTIR), X-ray powder diffraction (XRD), field emission scanning electron microscopic (FE-SEM) and transmission electron microscopy (TEM) respectively, showing it interconnects with coralloid morphology with the size of about 31–46 nm in diameter and 111–200 nm in length. A series of electrochemical studies reveal that the porous coralloid PANI/SnO 2 exhibits an excellent electrochemical performance towards the oxidation of NO 2 − and has acceptable linear response concentration range from 0.12 μM to 7.8 mM to NO 2 − oxidation, with lower detection limit of 0.04 μM (signal-to-noise ratio is 3, S/N = 3) and higher sensitivity of 121.2 μA mM −1 cm −2 . These results imply that PANI/SnO 2 may be a potential candidate for developing electrochemical sensors to detect NO 2 − in aqueous solution.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
ChemSusChem
·
2018
·Vol. 11
·期 17
·2898-2903
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IF 7.411
Jing Li,Tongle Bu,Yifan Liu,Jing Zhou,Jielin Shi,Zhiliang Ku,Yong Peng,Jie Zhong,Yi-Bing Cheng,Fuzhi Huang
Graphical Bathing in water : Interfacial engineering greatly improves the reproducibility in the synthesis of planar perovskite solar cells, with a much smaller standard deviation compared to pristine devices. The power conversion efficiency is also greatly increased in comparison, independent of the environmental humidity (0–75 % relative humidity). Low-temperature solution-processed SnO 2 as a promising electron-transport material for planar perovskite solar cells (PSCs) has attracted particular attention because of its outstanding properties such as high optical transparency or high electron mobility. However, low-temperature sol–gel processes used in the synthesis are inevitably affected by the humidity of the atmosphere, which results in a wide distribution in the performance of the prepared PSCs owing to the inability to control crystallinity and defects. Herein, a highly crystalline SnO 2 film is synthesized using a simple water bath post-treatment, which can remove the surface residuals of SnCl 4 on the SnO 2 films, which is beneficial for the interface charge transport from the perovskite to the SnO 2 electron-transport layer. An improved performance of the PSCs can be easily obtained applying this treatment, giving rise to a high power conversion efficiency (PCE) of 19.17 %, much higher than that of the pristine SnO 2 -based device (17.59 %). Most importantly, the reproducibility of the devices has been greatly improved, independent of the environmental humidity. Therefore, the enhanced crystallinity of SnO 2 has shown promise for future commercial PSC applications: 5 cm×5 cm PSC modules have achieved a PCE of 16.16 %.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Tongxin Song,Fei Gao,Liujun Jin,Yangping Zhang,Cheng Wang,Shujin Li,Chunyan Chen,Yukou Du
At present, although a large number of palladium-based nanowire electrocatalysts have been prepared, there are few reports on nanowires containing rich metal oxides . Herein, porous PdCu alloy nanowires and PdCu-SnO 2 nanowires were prepared by using a galvanic displacement synthesis method. Due to their one-dimensional structure, rough surfaces with non-homogeneous edges, electronic effect, and the advanced PdCu/SnO 2 interface of the as-synthesized PdCu-SnO 2 nanowire catalysts, they exhibited a mass activity of 7770.0 mA mg −1 towards ethanol oxidation , which was 7.6-fold higher than that of Pd/C catalysts (1025.0 mA mg −1 ). In addition, they behaved strong durability upon chronoamperometry and continuous cyclic voltammetry tests. The electrochemical measurements demonstrated that SnO 2 was introduced into the PdCu/SnO 2 interface, which promoted the oxidation of ethanol at a lower potential and accelerated the oxidation of Pd-CO ads via SnO 2 -OH ads to regenerate the active sites. This research highlights the significance of introducing metal oxides into the nanostructure interface, and the performance of Pd-containing catalysts towards ethanol oxidation reaction was greatly improved.
研究领域:
材料科学
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电化学
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催化反应
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2019
·Vol. 9
·期 20
·11046-11053
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IF 3.049
Pengjian Wang,Junfeng Hui,Tingbiao Yuan,Peng Chen,Yue Su,Wenjie Liang,Fulin Chen,Xiaoyan Zheng,Yuxin Zhao,Shi Hu
Ultrafine nanoparticles of W-doped SnO2 with an average diameter of 6 nm were fabricated via a facile hydrothermal method. The material shows a reduced particle size and enhanced response to H2S gas as compared to the pristine SnO2 nanoparticles. The detection limit can be down to 100 ppb while the response time and recovery time of the 5%-doped one are reduced to 17 s and 7 s respectively. In addition, the material shows impressive long-term stability of the response through 40 cycles of injection with 10 ppm H2S, which is attractive for designing a durable hydrogen sulfide sensor. The doping of W results in the reduction of size and modification of the electronic band structure of SnO2, which reduces the response time and recovery time and further improves the sensing durability of the materials.
研究领域:
材料科学
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纳米技术
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气体传感
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产品关联
DOI
PubMed
高影响因子
Nanoscale
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2013
·Vol. 5
·期 12
·5628-5636
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IF 6.233
Wei Wu,Lei Liao,Shaofeng Zhang,Juan Zhou,Xiangheng Xiao,Feng Ren,Lingling Sun,Zhigao Dai,Changzhong Jiang
We present an innovative approach to the production of sub-100 nm hollow Au–SnO2 hybrid nanospheres, employing a low-cost, surfactant-free and environmentally friendly solution-based route. The hollow hybrid nanostructures were synthesized using a seed-mediated hydrothermal method, which can be divided into two stages: (1) formation of multicore–shell Au@SnO2 nanoparticles (NPs) and (2) thermal diffusion and ripening to form hollow Au–SnO2 hybrid NPs. The morphology, optical properties and formation mechanism were determined by a collection of joint techniques. Photocatalytic degradation of Rhodamine B (RhB) in the liquid phase served as a probe reaction to evaluate the activity of the as-prepared hollow hybrid Au–SnO2 NPs under the irradiation of both visible light and ultraviolet light. Significantly, the as-obtained Au–SnO2 hybrid nanostructures exhibited enhanced visible light or UV photocatalytic abilities, remarkably superior to commercial pure SnO2 products and P25 TiO2, mainly owing to the effective electron hole separation at the SnO2–Au interfaces and strong localization of plasmonic near-fields effects.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Wei Zhang,XiaoLi Cheng,Xianfa Zhang,Yingming Xu,Shan Gao,Hui Zhao,Lihua Huo
Distinctive mesoporous SnO 2 microtubes were synthesized via a facile and environmentally friendly solvothermal method. The gas sensor based on such SnO 2 microtubes exhibited not only the lower detection limit to detect formaldehyde and remarkable selectivity comparison with other various gases when operating within 92 °C, but also good linear relationship under concentration ranges of ppm level (1–100 ppm) and ppb level (10–100 ppb). The sensing properties of such SnO 2 microtubes have been greatly improved compared to previously reported hollow structures. This might be attributed to their large specific surface area and porous structure, which can promote the diffusion of gas molecules and their adsorption on the surface of the sensing material.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED PHYSICS LETTERS
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2014
·Vol. 104
·期 7
·
IF 3.515
Zha Jun-Wei,Meng Xing,Wang Dongrui,Dang Zhi-Min,Li Robert K. Y.
SnO 2 nanoparticles with an average diameter of about 4 nm were coated on the surface of BaTiO 3 (BT) (∼100 nm) by chemical treatment. With the introduction of BT@SnO 2 , the dielectric permittivity of poly(vinylidene fluoride) (PVDF) composite was significantly increased to 90 at 10 3 Hz, which is ∼40% higher than that of the BT/PVDF composites. It was attributed to the enhanced interfacial polarization in the interlayers between BT and PVDF due to the addition of SnO 2 nanodots. The distance of SnO 2 nanodots on the adjacent BT surfaces is close enough for the electron transport in the matrix by tunneling effect. Besides, the semiconductive SnO 2 leads to the weak insulating-conducting transition close to the percolation threshold.
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Lingyue Liu,Peng Zhou,Xiaozhi Su,Yuhang Liu,Yuhan Sun,Hongbin Yang,Heyun Fu,Xiaolei Qu,Shantang Liu,Shourong Zheng
Monitoring sulfur dioxide (SO 2 ) in the environment requires a sensor to feature adequate sensitivity, selectivity, and low detection levels. Herein, we report an ultrasensitive, low-concentration SO 2 gas sensor that employs single atoms nickel anchored on oxygen vacancy-rich SnO 2 nanorods (SAC-Ni/H-SnO 2 ) as the sensing material. The response value of the SAC-Ni/H-SnO 2 sensor to 20 ppm SO 2 is 48, and the detection limit is 100 ppb, which is superior to most of reported SO 2 sensors. In-situ DRIFTS and ESR characterization shows that the coupling effects of SAC-Ni and adjacent oxygen vacancy on SnO 2 surface, which promote the adsorption of SO 2 and activation of chemisorbed oxygen, respectively. This effective single-atom catalyst provides a new insight into complex gas sensing mechanisms and demonstrates a promising approach of using single-atom catalysts for gas sensing applications.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2022
·
IF 2.042
Dan Sun,Xiaonian Tang,Xi-ang Tian,Li Liu
Pure and Ga-doped 3 D ordered porous SnO2 (3DOPS) and SnO2 nanoparticles (NPs) were prepared. The 3DOPS/3% Ga-based sensor exhibits an improved response (61/50 ppm) to formaldehyde (HCHO), and the response is 3 times higher than pure 3DOPS (21/50 ppm) at low temperature (220 °C). However, the response of SnO2 NPs/3% Ga (10/50 ppm) is only 1.25 times that of the pure SnO2 NPs (8/50 ppm). Regardless of the SnO2 morphology, doping with Ga can improve its response. However, after the 3 D ordered porous structure of SnO2 doped with Ga element, its response is improved more obviously than that of the particle structure of SnO2. This may be attributed to the combined effect of the construction of the three-dimensional ordered porous structure and the doping elements.
研究领域:
材料科学
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环境监测
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2023
·Vol. 52
·期 9
·5964-5974
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IF 2.1
Zhou Xuebin,Ying Zhihua,He Xingxin,Zhang Chenhan,Zheng Xiaolong,Zheng Peng
Cellulose nanofiber (CNF), a natural polymer material with a high specific surface area, is a potential candidate for gas sensors. Here, we report Au/SnO 2 composites with excellent performance synthesized by a chemical precipitation method based on CNF-assisted synthesis, and a series of Au/SnO 2 composites were prepared by adjusting the Au content. The sensitivity of the 1.5 wt.% Au/SnO 2 sensor to a low concentration of 1 ppm NO 2 was 53, nearly 17 times higher than that of pure SnO 2 synthesized by CNF, under ultraviolet (UV) irradiation at a wavelength of 365 nm. The crystal structure of the composite was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), revealing that the composites had high crystallinity and particles reaching the nanoscale. Further experimental data showed that the CNF-assisted synthesis Au/SnO 2 sensors had good selectivity, repeatability, and stability. Additionally, the sensor is able to maintain its excellent gas sensing performance even under varying humidity conditions.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2023
·
IF 3.9
Jiejing Zhang,Haiyue Wang,Qingyun Yang,Can Gao,Chunxiao Gao,Xizhe Liu
Electron transport layers can collect photo-generated electrons and suppress interfacial recombination, which are crucial for efficient perovskite solar cells . Tin oxide is a suitable electron transport material for its wide bandgap, high electron mobility , low photocatalytic activity and appropriate energy band offsets. For the deposition of tin oxide layers, SnCl 2 precursor is usually used for the conventional solution spin-coating method. In this work, we developed an in-situ synthesized precursor, and ultrathin tin oxide layers were obtained by the combustion process at 150 °C. Furthermore, the devices with these tin oxide layers can achieve the PCE of 19.6%, while conventional tin oxide layers with SnCl 2 precursor lead to the PCEs of 16.9% and 14.9% with and without plasma treatment. This improvement can be related to the enhanced photoelectron collection and superior interfacial contact. This work provides a facile method for fabricating SnO 2 electron transport layers of perovskite solar cells at low temperature.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
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2023
·
IF 5
Qing Huang,RuiQin Gu,Yunong Zhao,Huibing Fu,Huan Liu
Electrochemical sensors that incorporate immunoassay principles have the ability to monitor dynamic processes of antigen–antibody interactions in real time. In this study, a gold electrode was modified with tin dioxide colloidal quantum wire (SnO 2 QWs) and then coated with the leucine/arginine subtype microcystin (MC-LR) antibody. The active site of SnO 2 QWs that was not bound by MC-LR antibody was then passivated with bovine serum protein (BSA). When the MC-LR antigen binds specifically to the antibodies on the electrode's surface, it triggers electrochemical reactions and generates electrical signals at specific voltage conditions. The SnO 2 QW exhibits excellent electron transport ability, and its ability to form a loose and porous microstructure on the gold electrode surface, which is conducive to the receptor function of the biosensor. The results show a high affinity between the MC-LR antigen and antibody, ranging from 1 pg/mL to 10 ng/mL of MC-LR antigen concentration. The kinetic characteristics of the immune reaction between MC-LR antigen and antibody were elucidated, obtaining a binding constant of 1.399 × 10 11 M −1 and a dissociation constant of 7.147 pM, demonstrating the potential of electrochemical biosensing technology in biomolecular interactions.
研究领域:
分析化学
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生物传感器
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环境科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）