One step synthesis of branched SnO2/ZnO heterostructures and their enhanced gas-sensing properties

Yang, Xueli; Zhang, Sufang; Yu, Qi; Zhao, Lin; Sun, Peng; Wang, Tianshuang; Liu, Fangmeng; Yan, Xu; Gao, Yuan; Liang, Xishuang; Zhang, Sumei

doi:10.1016/j.snb.2018.10.138

Cited by 193 publications

(65 citation statements)

References 60 publications

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“…In the Sn 3d XPS spectrum in Figure 2b, the peaks of Sn 3d 5/2 at 486.3 eV and Sn 3d 3/2 at 494.6 eV corresponding to Sn 4+ were observed, which are attributed to the formation of SnO 2 . [ 37–40 ] The C 1s XPS spectrum in Figure 2c includes peaks corresponding to CC, CO, and C=O bonds at 284.1, 285.4, and 288.4 eV, respectively. [ 41–44 ] The highest intensity of the CC peak among the three peaks confirms the carbonization of PVA during heat‐treatment.…”

Section: Resultsmentioning

confidence: 99%

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Kwon

et al. 2020

Advanced Science

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Stretchable lithium batteries have attracted considerable attention as components in future electronic devices, such as wearable devices, sensors, and body‐attachment healthcare devices. However, several challenges still exist in the bid to obtain excellent electrochemical properties for stretchable batteries. Here, a unique stretchable lithium full‐cell battery is designed using 1D nanofiber active materials, stretchable gel polymer electrolyte, and wrinkle structure electrodes. A SnO2/C nanofiber anode and a LiFePO4/C nanofiber cathode introduce meso‐ and micropores for lithium‐ion diffusion and electrolyte penetration. The stretchable full‐cell consists of an elastic poly(dimethylsiloxane) (PDMS) wrapping film, SnO2/C and LiFePO4/C nanofiber electrodes with a wrinkle structure fixed on the PDMS wrapping film by an adhesive polymer, and a gel polymer electrolyte. The specific capacity of the stretchable full‐battery is maintained at 128.3 mAh g−1 (capacity retention of 92%) even after a 30% strain, as compared with 136.8 mAh g−1 before strain. The energy densities are 458.8 Wh kg−1 in the released state and 423.4 Wh kg−1 in the stretched state (based on the electrode), respectively. The high capacity and stability in the stretched state demonstrate the potential of the stretchable battery to overcome its limitations.

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Section: Resultsmentioning

confidence: 99%

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Kwon

et al. 2020

Advanced Science

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“…This large device-to-device deviation can be attributed to the displacement of PS microspheres under constant plasma bombarding, which leads to a disordered cross-linked network. In comparison with the various nanostructured SnO 2 prepared by other methods in Table 1, the crosslinked SnO 2 /NiO network exhibited comparable sensitivity [19,23,47,[49][50][51][52]. We also investigated the ethanol sensitivity of other MEMS compatible sensing materials in Table 1, such as DPN deposited Au/SnO 2 nanocomposites, ZnO nanowires grown on a MEMS microplate, and ZnO tetrapods deposited on a microheater [37,38,51].…”

Section: Gas-sensing Performancementioning

confidence: 99%

“…For example, triangle array or cross-linked network can be formed depending on the plasma etching time of PS spheres through the same processes: (i) self-assemble PS spheres, (ii) plasma etching of PS spheres, (iii) deposit MOS thin film, and (iv) remove PS spheres. Apart from creating more active adsorption sites, forming heterostructure to improve the sensing performance of MOS-based gas sensors has been intensively studied, which is a low cost, environmentalfriendly, and easy-to-implement method [25,[43][44][45][46][47][48]. The sputtering target can be designed by mixing two or more MOS elements, such as SnO 2 /NiO, SnO 2 /ZnO, SnO 2 / WO 3 , etc.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

et al. 2020

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Nowadays, it is still technologically challenging to prepare highly sensitive sensing films using microelectrical mechanical system (MEMS) compatible methods for miniaturized sensors with low power consumption and high yield. Here, sensitive cross-linked SnO 2 :NiO networks were successfully fabricated by sputtering SnO 2 :NiO target onto the etched self-assembled triangle polystyrene (PS) microsphere arrays and then ultrasonically removing the PS microsphere templates in acetone. The optimum line width (~600 nm) and film thickness (~50 nm) of SnO 2 :NiO networks were obtained by varying the plasma etching time and the sputtering time. Then, thermal annealing at 500°C in H 2 was implemented to activate and reorganize the as-deposited amorphous SnO 2 :NiO thin films. Compared with continuous SnO 2 :NiO thin film counterparts, these cross-linked films show the highest response of 9 to 50 ppm ethanol, low detection limits (< 5 ppm) at 300°C, and also high selectivity against NO 2 , SO 2 , NH 3 , C 7 H 8 , and acetone. The gas-sensing enhancement could be mainly attributed to the creating of more active adsorption sites by increased stepped surface in cross-linked SnO 2 :NiO network. Furthermore, this method is MEMS compatible and of generality to effectively fabricate other cross-linked sensing films, showing the promising potency in the production of low energy consumption and wafer-scale MEMS gas sensors.

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“…As the important gas sensing materials, SnO 2 and ZnO having band gaps of 3.6 eV and 3.4 eV, individually, previously reported for gas sensors. Recently, several studies have shown that sensing performance SnO 2 or ZnO can be highly enhanced by the formation of SnO 2 /ZnO heterostructures [15].…”

Section: Introductionmentioning

confidence: 99%

Sputtered SnO2/ZnO Heterostructures for Improved NO2 Gas Sensing Properties

Sharma

Sharma²,

Joshi

et al. 2020

Chemosensors

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A highly sensitive and selective NO2 gas sensor dependent on SnO2/ZnO heterostructures was fabricated using a sputtering process. The SnO2/ZnO heterostructure thin film samples were characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Sensors fabricated with heterostructures attained higher gas response (S = 66.9) and quicker response-recovery (20 s, 45 s) characteristics at 100 °C operating temperature towards 100 ppm NO2 gas efficiently in comparison to sensors based on their mono-counterparts. The selectivity and stability of SnO2/ZnO heterostructures were studied. The more desirable sensing mechanism of SnO2/ZnO heterostructures towards NO2 was described in detail.

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One step synthesis of branched SnO2/ZnO heterostructures and their enhanced gas-sensing properties

Cited by 193 publications

References 60 publications

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

Sputtered SnO2/ZnO Heterostructures for Improved NO2 Gas Sensing Properties

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One step synthesis of branched SnO2/ZnO heterostructures and their enhanced gas-sensing properties

Cited by 193 publications

References 60 publications

Porous SnO2/C Nanofiber Anodes and LiFePO4/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Porous SnO2/C Nanofiber Anodes and LiFePO4/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Sensitive Cross-Linked SnO2:NiO Networks for MEMS Compatible Ethanol Gas Sensors

Sputtered SnO2/ZnO Heterostructures for Improved NO2 Gas Sensing Properties

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Product

Resources

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Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance

Porous SnO₂/C Nanofiber Anodes and LiFePO₄/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance