JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2015
·Vol. 26
·期 10
·7914-7920
·
IF 1.569
Lan Zhang,Liu Lu,Huang Miaoliang,Wu Jihuai,Lin Jianming
Two kinds of hierarchical SnO 2 particles as nano-flower-like SnO 2 particles (NF-SnO 2 ) and mesoporous-sphere-like SnO 2 particles (MS-SnO 2 ) have been synthesized and used in CdS quantum dots (QDs) sensitized solar cells (QDSSC). TEM images show that NF-SnO 2 particles compose well interconnected nanoplates and MS-SnO 2 spheres are consisted with large numbers of SnO 2 nanoparticles with size about 7 nm. Owing to the larger Brunauer–Emmett–Teller surface area of NF-SnO 2 particles, NF-SnO 2 photoelectrode can load higher amounts of CdS QDs and shows enhanced light absorbance, resulting in higher short-circuit current density compared with that of MS-SnO 2 photoelectrode. The electrochemical impedance spectroscopy analysis results show that the QDSSC with NF-SnO 2 photoelectrode has a higher charge recombination resistance and a longer electron lifetime, so its photovoltaic performance is better than that of the QDSSC with MS-SnO 2 photoelectrode. The QDSSC with NF-SnO 2 photoelectrode can attain 3 % power conversion efficiency, which is higher than that of the cell with MS-SnO 2 photoelectrode (1.97 %).
研究领域:
材料科学
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能源科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xi-Qian Sun,Yun-Feng Li,Li Chen,Hong-Bao Li,Ren-Hui Gao,Jie Liu,Tian-Yu Yang,Zheng Guo
Lithium-ion batteries (LIBs) provide many benefits, but trace electrolyte leakage can cause serious safety risks such as thermal runaway. Although gas sensors offer a potential solution, the complexity of electrolyte solvents in LIBs makes it challenging to develop sensing materials capable of universally detecting multiple solvent molecules. Here, Ag@Ag2O-functionalized SnO2 nanoflowers were synthesized using a self-template pyrolysis strategy for the sensitive detection of both common solvent molecules and widely used electrolytes. These sensors, enhanced by abundant oxygen vacancies introduced by Ag@Ag2O functionalization, exhibit excellent sensitivity, particularly to dimethyl carbonate, with a response of 106–100 ppm, a low detection limit of 11.76 ppb, and rapid response/recovery times (28/55 s) at an operating temperature of 200 °C. The sensor performance was validated by density functional theory calculations, which corroborated the effectiveness of the sensing material. In simulated LIB leakage scenarios, such as puncture and electrolyte injection, the sensors demonstrated quick responses to various common electrolyte compositions, indicating their potential for practical applications. This study highlights an effective method for fabricating composite sensing materials and emphasizes the practical significance of our universal detection approach for practical monitoring of electrolyte leakage in energy storage devices.
研究领域:
材料科学
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能源技术
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化学传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Sufaid Shah,Shahid Hussain,Salah Ud Din,Abdulnasser M. Karami,You Tianyan,Mingsong Wang,Guiwu Liu,Guanjun Qiao
The current study, accurately designed and created a two-dimensional (2D) structure of SnO 2 nano-flowers and In 2 O 3 nanoparticles using a simple hydrothermal technique and sol-gel method, respectively. On the outer surface of SnO 2 nanoflowers the In 2 O 3 nanoparticles were uniformly growing, clearly revealed by field emission scanning electron microscopic. Besides, crystal phase structure, surface area and elementals composition were characterized by XRD, BET, TEM, EDS, XPS and the gas sensing properties of In 2 O 3 @SnO 2 NFs. The results exhibited that 2 wt% In 2 O 3 @SnO 2 NFs sensor is highly sensitive to NO 2 , the response (R g /R a ) to 30 ppm NO 2 is 94.5, and at 50 ppb the response measured 0.61 at 150 °C, the response time is 32 and 51s, respectively, along with good moisture resistance. Besides along with excellent selectivity, long-term stability, and relative humidity (RH) in high-humidity environment, the 2 wt% In 2 O 3 @SnO 2 NFs still maintain high response 91 at 30 ppm. More importantly, at room temperature the response was (Rg/Ra = 1.01) at detection limit 300 ppb towards NO 2 , which could use be for trace NO 2 gas detection. The large specific surface areas of SnO 2 , the abundance of oxygen species adsorbed on the surface, the distinctive electron transformation between heterojunction materials, and high electron transmission channel of SnO 2 and In 2 O 3 transition layer were all considered to have a synergistic effect thatin2 contributed to excellent sensing properties of In 2 O 3 @SnO 2 NFs.
研究领域:
材料科学
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环境监测
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2020
·Vol. 6
·期 1
·2000566
·
IF 5.969
Jinyong Wang,Jun Zhang,Wenfeng Wang,Yanan Guo
The detection of ultralow NO 2 for practical applications remains a significant challenge because the two critical characteristics of high sensitivity and good robustness are considerably unsatisfactory. Inspired by the classification of stimuli-receiving and signal-conveying for a stimuli-responsive procedure of a neuron in organisms, an internal micro-Schottky junction introduced into a chemiresistor is constructed as an efficient transduction strategy to boost the less concerned transducing stage for a further improvement in NO 2 sensing performance. The SnO 2 nanoflowers/reduced graphene oxide-based chemiresistor achieves a response of 10.5 toward 10 ppt NO 2 , with a record-breaking limit of detection of 0.73 ppt at room temperature as well as fast response and recovery times of 59 and 9 s at 10 ppt. Surprisingly, the sensor exhibits good robustness, including higher selectivity, long-term stability, and process stability. A comprehensive analysis of the electrical properties and energy band of inorganic materials reveals that the ultrahigh sensitivity and faster response/recovery are primarily related to the efficient transducing ability arising from the rapid electron transport and signal-amplifying effect contributed by micro-Schottky junctions. The concept of affiliating the sensing material modulation to the recepting and transducing stages and considering comprehensively provides a novel insight into the enhancement of gas sensing performance.
研究领域:
材料科学
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传感技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 19
·1471
·
IF 4.3
Liming Song,Xiaoxin Dou,Jianmei Shao,Yuanzheng Luo,Fumiao Liu,Chengyong Li,Lijuan Yan,Chuhong Wang,Yuting Li,Yuqing Cai,Jinsheng He,Zhenqing Dai,Ruikun Sun,Qin Xie
Hierarchical NiO-SnO 2 nanoflowers were prepared via a one-step hydrothermal method. The morphology, structure and components of the hierarchical NiO-SnO 2 nanoflowers were examined via scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The ethanol gas-sensing performance was systematically analyzed between pure hierarchical SnO 2 nanoflowers and the hierarchical NiO-SnO 2 nanoflowers. The results indicated that the hierarchical NiO-SnO 2 nanoflowers showed better gas-sensing properties than the pure hierarchical SnO 2 nanoflowers at 164 °C. The enhanced gas-sensing performance was ascribed to the formation of p-n heterojunctions between p-type NiO and n-type SnO 2 . Additionally, NiO has a catalytic role. Therefore, hierarchical NiO-SnO 2 nanoflowers could be a potential gas-sensing material for the fabrication of high-quality ethanol gas sensors.
研究领域:
材料科学
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纳米技术
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传感器学
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无机化学
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功能材料
✓ 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）