SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Yumeng Liu,Jinniu Zhang,Gang Li,Jia Liu,Qingfei Liang,Hongjun Wang,Yuanyuan Zhu,Jianzhi Gao,Hongbing Lu
In 2 O 3 –ZnO nanotubes were prepared by a solvent thermal method using electrospun indium nitrate–polyvinyl pyrrolidone [In(NO 3 ) 3 –PVP] nanofibers as a sacrificial template. The sensing properties toward NO 2 of this kind of new emerging sensing material were explored. Compared with as-electrospun In 2 O 3 nanofibers, the In 2 O 3 –ZnO composite nanotubes exhibited higher responses and better selectivity to NO 2 . The response of the In 2 O 3 –ZnO nanotubes to 500 ppb NO 2 at room temperature (RT, 25 °C) under UV irradiation was as high as to 32.73, which was 3.33 times higher than that of the In 2 O 3 nanofibers. Moreover, even under a high relative humidity of 80%, the RT NO 2 response of the In 2 O 3 –ZnO composite nanotubes can still reach up to 3.50–500 ppb. The enhanced NO 2 sensing characteristics were mainly ascribed to the formation of In 2 O 3 –ZnO n–n heterojunctions , the enhanced light absorption, and the increased oxygen vacancy proportion. The results suggested that In 2 O 3 –ZnO nanotubes had good potential for the selective and sensitive detection of ppb-level NO 2 at RT.
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
TALANTA
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2017
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IF 4.162
Hai-Hui Wang,Xuan-Jie Chen,Wei-Tian Li,Wen-Hui Zhou,Xiu-Chun Guo,Wen-Yi Kang,Dong-Xing Kou,Zheng-Ji Zhou,Yue-Na Meng,Qing-Wen Tian,Si-Xin Wu
In this study, ZnO nanotubes (ZNTs) were prepared onto fluorine-doped tin oxide (FTO) glass and used as supports for MIPs arrays fabrication. Due to the imprinted cavities are always located at both inner and outer surface of ZNTs, these ZNTs supported MIPs arrays have good accessibility towards template and can be used as sensing materials for chemical sensors with high sensitivity, excellent selectivity and fast response. Using K 3 [Fe(CN) 6 ] as electron probe, the fabricated electrochemical sensor shows two linear dynamic ranges (0.02–5 μM and 10–800 μM) towards dopamine. This proposed electrochemical sensor has been applied for dopamine determination with satisfied recoveries and precision. More complex human urine samples also confirmed that the proposed method has good accuracy for dopamine determination in real biological samples. These results suggest potential applicability of the proposed method and sensor in important molecule analysis.
研究领域:
材料科学
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分析化学
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生物医学工程
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Panpan Chen,Tian Hang
ZnO, as an important semiconductor, has been extensively studied for a wide range of applications. To date, with the development of micro/nano manufacturing technology, various hierarchical ZnO nanostructures have been fabricated and explored, showing encouraging success in advanced photodetectors. ZnO nanotube structure has a high surface-to-volume ratio, and versatile hollow channels, which are promising for sensing applications. Typical nanotube arrays primarily rely on advanced nanofabrication technologies. Simple and low-cost fabrication strategies are still lacking. Herein, we report a simple template fabrication method to obtain vertically aligned ZnO nanotube arrays. Using flexible, etched polyimide membranes as the template, ZnO nanotube arrays can be prepared in situ by dip-coating the sample into a zinc acetate solution followed by heating. Different hierarchical ZnO nanotube structures were obtained with the nanotube arrays when the method was combined with hydrothermal growth. We have demonstrated that the structures may be used in flexible and transparent photodetectors. Our work provides a facile approach for fabricating ZnO nanotube arrays and expands the application of ZnO nanotube structures to flexible and transparent photodetectors.
研究领域:
材料科学
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纳米技术
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2020
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IF 5.977
Yu Wang,Qin Lei,Wanxin Dong,Xinxin Mo,He Li
In this work, a multicolor visual immunoassay platform was developed. The photoelectric effects of Ag 2 S NPs@ZnO NTs made the color changes of PANI/PB, which enabled visual inspection of CEA. Under the visible light excitation, Ag 2 S NPs@ZnO NTs generates electron-holes. Where, photoelectrons will pass electrical circuit to PB and photoinduced holes will oxidize PANI, which making the PANI/PB composite changes from emerald green-blue-purple-black colors. When CEA was incubated, the migration rate of photogenerated carriers is slowed down owing to the steric hindrance , resulting in different color changes of PANI/PB. In addition, the average green channel of PANI/PB read by photoshop has a certain correlated linear relationship with the concentration of CEA. Meanwhile, we can observe the color transformation of PANI/PB with our own eyes. By integrating advantages of photoelectrochemistry and colorimetry , the linear range of CEA detection was 0.1–20 ng/mL, and the detection limit was 0.05 ng/mL (S/N = 3). More importantly, this multicolor sensing method is very convenient, simple and low-cost. The photocarriers-modulated colorimetric strategy also provides a novel idea for visual portable platform design in clinical diagnosis.
研究领域:
生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Wenjian Shen,Jing Zhang,Shiyu Wang,Heping Du,Yiwen Tang
Interface passivation layer deposited onto photoanodes has been proven to be an available way to suppress charge recombination and enhance the power conversion efficiency in quantum dot-sensitized solar cells. In this work, the ZnS-MnS composites layers inserted in ZnO/CdS nanotubes photoanodes interface is firstly fabricated via ion-exchange and chemical bath deposition methods, simultaneously. By inserting the ZnS-MnS composites, electron back transfer is efficiently hindered. In addition, the uniform ZnS-MnS layer effectively blocks the direct contact between the polysulfide electrolyte and ZnO nanotubes, which inhabits the recombination of electron-hole pairs occurred at the interface. Besides, the MnS layer is in favour of the CdS quantum dots in higher load, profiting the light absorption intensity in the visible light region. Thus ZnO/ZnS-MnS/CdS nanotubes quantum dot-sensitized solar cells have efficiency of 3.62%, which is much higher than that of the solar cell with ZnS passivation layer (2.33%). This work demonstrates that constructing ZnS-MnS interface passivation layer with a proper band gap structure is a promising approach to enhance the performance of quantum dot-sensitized solar cells.
研究领域:
材料科学
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纳米技术
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太阳能
✓ 已验证
DOI
高影响因子
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