Selective-detection NO at room temperature on porous ZnO nanostructure by solid-state synthesis method

Huang, Ning; Cheng, Yunhao; Li, Huiyu; Zhao, Li; He, Zhongyu; Zhao, Chun; Liu, Fengmin; Ding, Lan

doi:10.1016/j.jcis.2019.07.013

Cited by 39 publications

(13 citation statements)

References 45 publications

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“…The response time to 50 ppb, 100 ppb, and 1 ppm NO was 17, 22, and 12 s, respectively, and the corresponding recovery time was 6, 11, and 55 s, respectively. This shows a better response and recovery characteristics among the room-temperature NO sensors. − …”

Section: Resultsmentioning

confidence: 86%

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Zhang

et al. 2021

ACS Sens.

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Portable and sensitive mixed-potential type solid-state electrolyte (MPSE) gas sensors can detect exhaled biomarkers in a noninvasive and inexpensive way, which is significant for convenient disease diagnosis and saving medical resources. However, high working temperature is still one of the main bottlenecks for hindering MPSE gas sensors’ applications in disease diagnosis. Here, we, for the first time, developed and fabricated new room-temperature MPSE gas sensors utilizing K2Fe4O7 electrolyte and Ni/Fe–MOF (Ni/Fe clusters are coordinated with 1,4-H2BDC) sensing electrodes (SEs) for the detection of ppb-level NO. Among different MOF SEs, the sensor attached with the Ni–MOF SE presents the highest NO sensitivities. This is attributed to a reducing oxygen reduction reaction activity and enhancing NO electrochemical catalytic reaction activity, verified by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) tests. In addition, the presented sensor also shows a low detection limit (20 ppb), fast response/recovery characteristic (17 s/6 s to 50 ppb NO), excellent selectivity, acceptable repeatability, and long-term stability of 34 days to NO at 25 °C and 60%RH. Simultaneously, the mechanism of humidity effect on the sensing performance was investigated by EIS and CV tests. Our work provides new insight into the development of room-temperature solid-state electrolyte gas sensors based on the mixed-potential mechanism and enlarges the potential application domain.

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Section: Resultsmentioning

confidence: 86%

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Zhang

et al. 2021

ACS Sens.

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“…This decreased rate of the increase in responsivity may be ascribed to the nearly occupied adsorption sites in the composite OFET sensors [ 46 ]. The sensing parameters obtained in this study are presented in Table 1 and compared to those of metal-oxide-based sensors presented in previous studies [ 100 , 101 , 102 ]. This result indicates that the sensing parameters of the P3HT/g-C₃N₄ OFET sensor are superior to those of the conjugated polymer film based sensors and comparable to those of the metal-oxide-based sensors.…”

Section: Resultsmentioning

confidence: 92%

Enhanced Nitric Oxide Sensing Performance of Conjugated Polymer Films through Incorporation of Graphitic Carbon Nitride

Kyokunzire

Jeong

Shin

et al. 2023

IJMS

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Organic field-effect transistor (OFET) gas sensors based on conjugated polymer films have recently attracted considerable attention for use in environmental monitoring applications. However, the existing devices are limited by their poor sensing performance for gas analytes. This drawback is attributed to the low charge transport in and the limited charge–analyte interaction of the conjugated polymers. Herein, we demonstrate that the incorporation of graphitic carbon nitride (g-C₃N₄) into the conjugated polymer matrix can improve the sensing performance of OFET gas sensors. Moreover, the effect of graphitic carbon nitride (g-C₃N₄) on the gas sensing properties of OFET sensors based on poly(3-hexylthiophene) (P3HT), a conjugated polymer, was systematically investigated by changing the concentration of the g-C₃N₄ in the P3HT/g-C₃N₄ composite films. The obtained films were applied in OFET to detect NO gas at room temperature. In terms of the results, first, the P3HT/g-C₃N₄ composite films containing 10 wt.% g-C₃N₄ exhibited a maximum charge carrier mobility of ~1.1 × 10−1 cm2 V−1 S−1, which was approximately five times higher than that of pristine P3HT films. The fabricated P3HT/g-C₃N₄ composite film based OFET sensors presented significantly enhanced NO gas sensing characteristics compared to those of the bare P3HT sensor. In particular, the sensors based on the P3HT/g-C₃N₄ (90/10) composite films exhibited the best sensing performance relative to that of the bare P3HT sensor when exposed to 10 ppm NO gas: responsivity = 40.6 vs. 18.1%, response time = 129 vs. 142 s, and recovery time = 148 vs. 162 s. These results demonstrate the enormous promise of g-C₃N₄ as a gas sensing material that can be hybridized with conjugated polymers to efficiently detect gas analytes.

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“…The O 1s core-level spectra (Figure a 3 ,b 3 ,c 3 ) of the three ZnO clusters can be fitted into three Gaussian peaks, indicating that three different forms of oxygen exist in the near-surface region of the ZnO clusters. , The peaks at a low binding energy of about 530.5 eV corresponds to O 2– ions in the Zn–O bonding of the normal wurtzite ZnO structure, which belong to the lattice oxygen (O L ) of ZnO . The peaks positioned at 531.5 and 532.5 eV can be attributed to Zn–OH bonding (O H ) and the presence of CO bonding (O C ) originating from the surface adsorbed phytochemical molecules and adsorbed water, respectively. , The respective atomic concentrations of Zn, O L , O H , and O C and the relative ratios of O L /Zn are summarized in Table , which were calculated on the basis of the peak areas and atomic sensitivity factors along with the peak areas after fitting the XPS spectra of Zn and O in ZnO as shown in Tables S1 and S2 . The ratios of O L /Zn for the three ZnO clusters are lower than 1, indicating that oxygen vacancies ( V O ) exist in the surface layers of the clusters .…”

Section: Resultsmentioning

confidence: 97%

“…The final particles were dried for 24 h at 80 °C in an air oven. Different factors, including the amount of OLE (10, 30, 50, 70, and 100%), pH (4, 6, 8, and 10), zinc salt concentration (0.02, 0.05, 0.1, and 0.2 M), and temperature (25,40,60, and 80 °C), were also investigated by the single-factor method. For all factors, the ultraviolet−visible (UV−vis) spectrum was recorded every 30 min.…”

Section: Preparation Of Olementioning

confidence: 99%

Phyto-Mediated Controllable Synthesis of ZnO Clusters with Bactericidal Activity

Yang

Song

Hui

et al. 2022

ACS Appl. Bio Mater.

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The rapid development of antibiotic resistance has been considered a major threat to public health. Nanomaterials have risen to be an effective weapon to tackle this problem through multiple antibacterial mechanisms. The improved and tailored physiochemical properties of fine-tuned secondary nanoarchitectures contribute to the superior bactericidal actions of metal oxide structures. However, it is still challenging to construct secondary structures through mild green manufacturing methods. Here, we report the preferred antibacterial ZnO nanocrystal clusters formed by a green structure-tuning synthesis process, in which the primary ZnO nanoparticles with sizes <10 nm were assembled into different forms of clusters depending on the zinc salt concentration and temperature. ZnO clusters with a stable loose-assembly structure and a rougher surface exhibited better bactericidal ability with minimal inhibitory concentrations of 0.5 and 0.1 mg/mL against Escherichia coli and Staphylococcus aureus, respectively. The underlying mechanism is related to enhancing contact with bacteria, releasing small ZnO nanoparticles, and generating additional reactive oxygen species, which could aggravate the damage to bacterial cell membrane and eventually lead to bacterial death. Furthermore, attachment of phenolic compounds from olive leaf extract would promote membrane penetration by ZnO nanoparticles, resulting in the improvement of antibacterial activities, which profit from the green route mediated by Olea europaea leaf extract that could structuretune ZnO nanocrystal clusters in one simple step that retains the active ingredients on the nanoparticles. This work proposes a feasible and clean strategy to improve the structure−bioactivity relationship of ZnO by controlling its growth into a preferable structure, and the developed ZnO clusters have a good prospect in antibacterial applications because of their excellent performance and green fabrication method.

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Selective-detection NO at room temperature on porous ZnO nanostructure by solid-state synthesis method

Cited by 39 publications

References 45 publications

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Enhanced Nitric Oxide Sensing Performance of Conjugated Polymer Films through Incorporation of Graphitic Carbon Nitride

Phyto-Mediated Controllable Synthesis of ZnO Clusters with Bactericidal Activity

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Selective-detection NO at room temperature on porous ZnO nanostructure by solid-state synthesis method

Cited by 39 publications

References 45 publications

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K2Fe4O7 Electrolyte and Ni/Fe–MOF Sensing Electrodes

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K2Fe4O7 Electrolyte and Ni/Fe–MOF Sensing Electrodes

Enhanced Nitric Oxide Sensing Performance of Conjugated Polymer Films through Incorporation of Graphitic Carbon Nitride

Phyto-Mediated Controllable Synthesis of ZnO Clusters with Bactericidal Activity

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Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes

Room-Temperature Mixed-Potential Type ppb-Level NO Sensors Based on K₂Fe₄O₇ Electrolyte and Ni/Fe–MOF Sensing Electrodes