APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Bingyu Gao,Qi Cao,Xingyu Pu,Jiabao Yang,Jian Han,Shuangjie Wang,Tongtong Li,Ziwei He,Xuanhua Li
SnO 2 is regarded as the most promising electron transporting layer (ETL) material for perovskite solar cells (PSCs). Various functional groups are introduced onto the SnO 2 surface by interface modification with the purpose of improving the performance of the PSCs. However, most of the modifications are achieved in two-step approach, which are complicated and not easily realized. Here, we employ a facile one-step, low-temperature, and effective method to synthesis urea-complexed SnO 2 ETL (referred as Urea-SnO 2 ). The –NH 2 groups on Urea-SnO 2 attributes to facilitate the charge transfer within the SnO 2 ETL and reduce trap state density in the perovskite film through the chemical interactions. Therefore, The PSCs based on the Urea-SnO 2 ETL exhibit a champion power conversion efficiency (PCE) of 20.25%, which is more excellent than the devices based on the pristine SnO 2 ETL (17.60%). Functionalization of SnO 2 in situ by the precursor solution method offers an efficient method for high performance planar PSCs.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Rui Li,Wei Xiao,Chang Miao,Rui Fang,Zhiyan Wang,Mengqiao Zhang
A novel sphere-like SnO 2 /TiO 2 composite is synthesized via spray-drying followed by calcination as confirmed by X-ray diffraction and field emission-scanning electron microscopy analyses; the SnO 2 /TiO 2 composite is composed of the tetragonal cassiterite-like SnO 2 nanoparticles and anatase-like TiO 2 nanospheres . The characterization results show that the optimal stoichiometric ratio of SnO 2 /TiO 2 is approximately 3:1 when the composite serves as the anode for lithium ion batteries, in which the composite electrode not only delivers a high initial discharge specific capacity of 1476 mAh g −1 and retains 483 mAh g −1 after 40 cycles at 500 mA g −1 but also presents a low transfer resistance of approximately 56.33 Ω, a high Warburg coefficient of up to 85.82 Ω cm 2 s −0.5 , and a high lithium ion diffusion coefficient of approximately 6.934 E-15 cm 2 s −1 at ambient temperature. These excellent electrochemical properties suggest that the SnO 2 /TiO 2 composite electrode may be a promising anode material for lithium ion batteries .
研究领域:
材料科学
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能源存储与转换
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Feifei You,Yunan Zhou,Danyang Li,Hao Zhang,Dawei Gao,Xiaohong Ma,Rui Hao,Juzhe Liu
Photoreduction of CO 2 to value-added chemicals and fuels is an attractive solution to alleviate environmental problems and energy crisis at the same time. However, engineering efficient photocatalysts with high activity and product selectivity is still challenging. Herein, we achieved three-dimensional (3D) spatial configuration design at micro-scale and heterogeneous interface construction at nano-scale on a SnS 2 /SnO 2 composite, which featured hierarchical flower-like morphology consisted of nanosheets and type-II semiconductor structure . It behaved excellent selectivity and impressive photocatalytic CO 2 -to-CO performance with a yielding rate of 60.85 μmol g -1 h −1 , roughly 3 times higher than that of SnS 2 and was in the front rank of this kind catalysts under 300 W Xe lamp illumination without using any sensitizers or noble metals . The enhanced catalytic capability could be attributed to the elaborately built structure with suitable energetic position that afforded effective separation and migration of photo-generated electron/hole pairs as well as enhanced light caption and absorption. Meanwhile, main reactive intermediates (e.g., CO 2 – and *COOH) were captured by in-situ Fourier transform infrared spectroscopy (FTIR), suggesting a fluent catalytic pathway on the SnS 2 /SnO 2 platform. This work provides a new scheme to build advanced catalysts based on multiscale design and rational phase assembling.
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
PubMed
高影响因子
Journal of Physical Chemistry C
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2021
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IF 4.126
Dan Sun,Xiaonian Tang,Shuo Li,Li Liu
Pure and Ga-doped 3D ordered porous SnO2 (3DOPS) nanomaterials were synthesized by a simple template method, and SnO2 nanoparticles (NPs) were prepared by an annealing process. The presence of Ga in 3DOPS and the structure of 3DOPS were determined by X-ray powder diffraction (XRD), energy-dispersive spectroscopy (EDS), X-ray photoelectric spectroscopy (XPS), and scanning electron microscopy (SEM). The surface areas of the porous structure were measured by the BET method using a middle-high pressure physical gas adsorption instrument. Due to the porous structure and dopant effects on the SnO2 nanomaterials, 3 at % Ga-doped 3DOPS has the largest specific surface area (61.58 m2/g) compared with pure particle tin dioxide (38.60 m2/g). The 3 at % Ga-doped 3DOPS-based sensor exhibits a lower detection limit (2/0.1 ppm) and improved sensitivity (55/50 ppm) to formaldehyde (HCHO) at a low temperature (210 °C), and the response is 6.5 times higher than that of the pure SnO2 NP-based sensor (8.5/50 ppm). However, the response of pure 3DOPS (18/50 ppm) is only twice as high as that of the pure SnO2 NP-based sensor. In addition, the 3.0 at % Ga-doped level of the SnO2 sensor showed a fast response time (2 s) and excellent selectivity. The high sensitivity of SnO2 can be explained by the increase in the specific surface area and porosity brought by the 3D ordered porous structure, and the modified suface structure by precious metals.
研究领域:
材料科学
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纳米技术
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环境监测
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
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2022
·Vol. 189
·期 12
·1-10
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IF 6.408
Shi Yanmei,Hu Kai,Mei Lin,Yang Xueming,Shi Yange,Wu Xiangxiang,Li Xiu-min,Miao Mingsan,Zhang Sisen
A novel SnO 2 quantum dots (SnO 2 QDs)-functionalized Ti 3 C 2 MXene nanocomposite was prepared via in situ synthesis method, resulting in well-regulated the nucleation and growth of SnO 2 QDs to evenly distribute onto MXene nanosheets. Ultra-small size SnO 2 QDs decorated on the surface of Ti 3 C 2 MXene nanosheets can effectively prevent the restacking of MXene and remarkably increase the electroactive surface area of the electrode, which can further increase electrocatalytic activity toward dopamine. Then, an ultrasensitive electroanalytical method based on SnO 2 QDs-functionalized Ti 3 C 2 MXene nanocomposite for dopamine monitoring was developed, and the effects of experimental condition were investigated systematically. Under optimized conditions, the prepared sensor presented a linear dependence for dopamine in the concentration range from 0.004 to 8.0 µM with the detection limit of 2.0 nM (S/N = 3). Moreover, it selectively perceived dopamine in presence of physiological interferents in urine and serum samples with excellent linearities (correlation coefficients higher than 0.9920). The relative recoveries were in the range 97.67–105.3% and 103.0–106.8%, while the limits of quantitation were 10.12 nM and 9.62 nM in urine and serum sample, respectively, demonstrating the method suitability for dopamine sensing and being envisioned as a promising candidate for neurotransmitter monitoring in biological diagnosis. Graphical Abstract
研究领域:
材料科学
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分析化学
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生物医学
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DOI
高影响因子
ACS Sensors
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2023
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IF 8.9
Huajing Wang,Rui Xiong,Zhou Cui,Jie Wan,Baisheng Sa,Xiao Wu,Wulin Song,Xiaoxia Wang,Dawen Zeng
The problems of lithium-ion battery (LIB) failure have attracted growing attention since flammable and explosive electrolyte leakage might lead to serious consequences. However, due to the redox-neutral and volatile nature of main electrolyte components, such as dimethyl carbonate (DMC), trace leakages are difficult to detect. Therefore, research on LIB electrolyte sensors is urgent and lacking. Herein, sensors based on rare-earth Nd-doped SnO2 nanofibers are reported for detecting DMC vapor in LIB. The excellent sensitivity (distinct response to 20 ppb DMC), high response (∼38.13–50 ppm DMC), and superior selectivity and stability of 3%Nd-SnO2 suggest that it should be a promising candidate for LIB safety monitors. Meanwhile, it also shows clear and rapid response during the LIB-leakage real-time detection experiment. The doping of Nd endows SnO2 with more oxygen vacancy defects. In addition, the highly active Nd sites greatly enhanced the adsorption energy of DMC on SnO2. All of these features contribute to the improvement of DMC-sensing performances.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Mengyun Wang,Chuanxuan Zhou,Fuchao Yang
The size effect through quantum dots is an effective method to improve the performance of gas sensors. This paper reports the design of a triethylamine sensor based on a SnO 2 -MoS 2 heterojunction structure. The porous SnO 2 was synthesized using a polystyrene microsphere template and then loaded with MoS 2 quantum dots (MoS 2 QDs) by the impregnation method. The gas-sensitizing properties of the prepared sensors were systematically investigated. Compared with the single SnO 2 and MoS 2 gas sensing materials, the SnO 2 -MoS 2 sensor showed higher selectivity to triethylamine at the optimal operating temperature of 160 °C, and the response performance was improved by 192 %. The results show that the SnO 2 -MoS 2 heterojunction improves the sensing performance due to its unique pore structure, oxygen vacancies and n-n heterojunction. In addition, the energy band structure and triethylamine sensing mechanism of SnO 2 -MoS 2 heterojunctions were analyzed by density functional theory. This work provides significant value for the study of gas-sensitive properties and triethylamine sensors of SnO 2 -MoS 2 QDs composites.
研究领域:
材料科学
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传感器技术
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理论计算
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产品关联
DOI
高影响因子
ACS Omega
·
2024
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IF 3.7
Yu Zhang,Quan Xie,Lin Lyu,Jiang Zou,Zhou Lu
A specific matrix sensor that can operate at low temperatures and has a high sensing response is crucial for monitoring flammable VOC gases. In this study, a nanostructured SnO2 thin film was successfully produced using a suitable chemical deposition method, and its sensing properties were comprehensively analyzed. The SEM images revealed that the thin film of the nanostructured SnO2 is made up of two different sizes of broccoli-like structure nanoparticles. The sensor, which is based on this unique micronano structure, demonstrated a high sensing response (44), low operating temperature (200 °C), and fast response time (6s). Additionally, the nanostructured sensor exhibited excellent resistance to humidity interference and long-term stability. Moreover, DFT is employed to evaluate the electronic properties and to systematically explain the gas sensing mechanism of the nanostructured sensor based on the SnO2 thin film.
研究领域:
材料科学
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化学
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传感技术
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产品关联
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 43
·期 9
·5217-5228
·
IF 1.369
Qin Na,Jing Kaiqiang,Chen Rui,Xiong Jinhua,Liang Ruowen,Li Zhaohui,Wu Ling
Abstract SnS 2 /SnO 2 nanocomposites have been successfully prepared via a hydrothermal method using electrospun SnO 2 nanotubes as both substrates and reactants. The ratios of the nanocomposites are controlled by varying the concentration of thioacetamide during the solvothermal synthesis processes. The as-prepared SnS 2 /SnO 2 nanocomposites exhibit considerable improvement on the photocatalytic activities for the reduction of aqueous Cr(VI) under visible light irradiation. Their photoactivities are also much higher than that of SnS 2 nanoplates and a physical mixture of SnO 2 and SnS 2 . In particular, the SnS 2 /SnO 2 -B sample exhibits the highest photocatalytic activity. After visible light irradiation for 60 min, the reduction rate has reached about 100%. The photoelectrochemical analyses further show that the high photocatalytic activity of the SnS 2 /SnO 2 -B sample can be ascribed to the unique structural features and the intimate interfacial contact between SnS 2 and SnO 2 , which is more effective separation of the photo-generated carriers. Graphical Abstract
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Wenbo Lu,Degong Ding,Qingzhong Xue,Yonggang Du,Ya Xiong,Jianqiang Zhang,Xinglong Pan,Wei Xing
In this study, unloaded and Pt-loaded SnO 2 nanofibers (NFs) with 100–150 nm diameters were synthesized by a simple electrospinning technology and then calcined at 600 °C in air. It was observed that the Pt-SnO 2 NFs were comprised of strings of tiny SnO 2 nanoparticles decorated with Pt and PtO nanoparticles, resulting in the formation of PtO/SnO 2 heterojunction and high porosity. And then, we studied the methane (CH 4 ) sensing performance of the sensors fabricated from these NFs and found that 20 mol% Pt-SnO 2 NFs exhibited excellent CH 4 sensing properties over a temperature range of 100–350 °C, for example, the 20 mol% Pt-SnO 2 NFs showed an obvious response of 1.11–1 ppm CH 4 at 350 °C, which was 2 orders of magnitude lower than the minimum detection limit of the current SnO 2 based CH 4 sensors. The great enhancement of the CH 4 sensing properties of Pt-SnO 2 NFs can be understood by the PtO/SnO 2 heterogeneous sensitization and Pt catalytic effect. Our findings present a novel strategy for the application of SnO 2 based NFs in highly effective CH 4 detection.
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
ACS Applied Materials & Interfaces
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2018
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IF 8.097
Ziying Wang,Tianyi Han,Teng Fei,Sen Liu,Tong Zhang
The microstructures of metal oxide-modified reduced graphene oxide (RGO) are expected to significantly affect room-temperature (RT) gas sensing properties, where the microstructures are dependent on the synthesis methods. Herein, we demonstrate the effect of microstructures on RT NO2 sensing properties by taking typical SnO2 nanoparticles (NPs) embellished RGO (SnO2 NPs-RGO) hybrids as examples. The samples were synthesized by growing SnO2 NPs on RGO through hydrothermal reduction (SnO2 NPs-RGO-PR), which display the advantages such as high reactivity of the SnO2 surface with NO2, more oxygen vacancies (OV) and chemisorbed oxygen (OC), close contact between SnO2 NPs and RGO, and large surface area, compared to the samples prepared by one-pot hydrothermal synthesis from Sn4+ and GO (SnO2 NPs-RGO-IS), and the assembly of SnO2 NPs on RGO (SnO2 NPs-RGO-SA). As expected, the SnO2 NPs-RGO-PR-based sensor presents high sensitivity towards 5 ppm NO2 (65.5%), but 35.0% for the SnO2 NPs-RGO-IS-based sensor and 32.8% for the SnO2 NPs-RGO-SA-based sensor at RT. Meanwhile, the corresponding response time and recovery time calculated by achieving 90% of the current change of the SnO2 NPs-RGO-PR-based sensor for exposure to NO2 is 12 s and to air is 17 s, respectively, whereas 74/42 s for the SnO2 NPs-RGO-IS-based sensor and 77/90 s for the SnO2 NPs-RGO-SA-based sensor. The results can prove the tailoring sensing behavior of the gas sensor according to different structures of 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
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xuan Wang,Zhenkuang Lei,Chunlin Zheng,Xueheng Zhuang,Qikui Man,Guoguo Tan
Semiconductor metal oxides are widely used in the field of wave absorption because of their easily tunable dielectric properties . Doping or modulating the morphology has been demonstrated to be an effective method to improve the microwave (MW) absorbing performance of semiconductor metal oxides. In this study, Ce-doped SnO 2 was prepared by a simple and effective coprecipitation method. Single-crystal SnO 2 nanorods were generated during the doping process and the size of the nanorods could be controlled by modifying the concentration of Ce. The presence of nanorods greatly enhances the MW absorbing performance: when the doping molar ratio is 3%, the minimum reflection loss of the absorber is −77.91 dB at a frequency of 13.79 GHz with a thickness of 1.6 mm and the maximum effective absorbing bandwidth is 4.47 GHz at a thickness of 1.5 mm. Excellent MW absorbing performance of Ce-doped SnO 2 is attributed to its excellent impedance matching and interfacial polarization.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）