Low concentration isopropanol gas sensing properties of Ag nanoparticles decorated In2O3 hollow spheres

Zhang, Chao; Huan, Yunchun; Liu, Ying; Luo, Yifan; Debliquy, Marc

doi:10.1007/s40145-021-0530-x

Cited by 68 publications

(39 citation statements)

References 63 publications

(57 reference statements)

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“…Doping strengthens the gas sensor sensing performance by modifying the bandgap structure and decreasing charge carriers' activation energy. Morphology controlling, recombining, and introducing high-concentration defects also showed remarkable enhancement to their kinetics [40][41][42].…”

Section: Sensing Materialsmentioning

confidence: 99%

Metal oxide semiconductor gas sensing materials for early lung cancer diagnosis

He¹,

Chai²,

Luo³

et al. 2023

Journal of Advanced Ceramics

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The urgency of early lung cancer (LC) diagnosis and treatment has been more and more significant. Exhaled breath analysis using gas sensors is a promising way to find out if someone has LC due to its low-cost, non-invasive, and real-time monitoring compared with traditional invasive diagnostic techniques. Among sensor-based gas detection techniques, metal oxide semiconductor's gas sensors are one of the most important types. This review presents the-state-of-art in metal oxide gas sensors for the diagnosis of early LC. First, the exhaled breath biomarkers are described with emphasis on the concentration of abnormal volatile organic compounds (VOCs) caused by the metabolic process of LC cells. Then, the research status of metal oxide gas sensors in LC diagnosis is summarized. The sensing performance and enhancement strategy of biomarkers provided by metal oxide semiconductor materials are reviewed. Another effective way to improve VOC detection performance is to build a gas sensor array. At the same time, various gas sensors combined with self-powered techniques are mentioned to display a broad development prospect in breath diagnosis.Finally, metal oxide gas sensor-based LC diagnosis is prospected.

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Section: Sensing Materialsmentioning

confidence: 99%

Metal oxide semiconductor gas sensing materials for early lung cancer diagnosis

He¹,

Chai²,

Luo³

et al. 2023

Journal of Advanced Ceramics

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“…The gas response goes hand in hand with the specific surface area and porosity of the material [48,49]. Therefore, researchers' research on topography is based on high specific surface area and porosity.…”

Section: Morphologymentioning

confidence: 99%

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Zeng

2022

Journal of Sensors

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In this review, we summarized the state-of-the-art progress on the ethanol performance of NiO by means of morphology, doping, loading noble metal particles, and forming heterojunctions. We first introduced the effect of modulating NiO morphology on ethanol performance that has been reported in recent years. The morphology with large specific surface area and high porosity was considered to be the one that can bring high gas response. Then, we discussed the enhanced effect of the doping of metal cations and noble metal particle loading on the ethanol-sensitive properties of NiO. Doping ions increased the ground-state resistance and increased the oxygen defect concentration of NiO. The effects of noble metal particles on the performance of NiO included chemical sensitization and electronic sensitization. Finally, the related contents of NiO forming complexes with metal oxides and bimetallic oxides were discussed. In this section, the specific improvement mechanism was discussed first, and then, the related work of researchers in recent years was summarized. At the same time, we presented a reasonable outlook for NiO-based ethanol sensors, imagining future directions.

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“…Specifically, when exposed to purified air, oxygen molecules were adsorbed onto CeO 2 sensing materials and captured free electron from the conduction band to generate the adsorbed oxygen species (O 2 -) [41], simultaneously producing an electron depletion region and a potential barrier (Figs. 6(a) and 6(c)), contributing to a decrease in the electron concentration of CeO 2 , and displaying an increase in the resistance [42,43]. While linalool gas was introduced, C 10 H 18 O(g) was firstly transformed into C 10 H 18 O(ad) (Reaction (3)) [11].…”

Section: Gas Sensing Mechanismmentioning

confidence: 99%

Oxygen vacancy engineering on cerium oxide nanowires for room-temperature linalool detection in rice aging

Zhang

2022

J Adv Ceram

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It is a huge challenge for metal oxide semiconductor gas sensors to inspect volatile organic compounds (VOCs) at room temperature (RT). Herein, the effective utilization of cerium oxide (CeO2) nanowires for RT detection of VOCs was realized via regulating its surface chemical state. Oxygen vacancy engineering on CeO2 nanowires, synthesized via hydrothermal method, can be manipulated by annealing under various controlled atmospheres. The sample annealed under 5%H2+95%Ar condition exhibited outstanding RT sensing properties, displaying a high response of 16.7 towards 20 ppm linalool, a fast response and recovery time (16 and 121 s, respectively), and a low detection of limit of 0.54 ppm. The enhanced sensing performance could be ascribed for the synergistic effects of its nanowire morphology, the large specific surface area (83.95 m2/g), and the formation of extensive oxygen vacancy accompanied by an increase in Ce3+. Additionally, the practicability of the sensor was verified via two varieties of rice (Indica and Japonica rice) stored in various periods (1, 3, 5, 7, 15, and 30 d). The experimental results revealed that the sensor was able to distinguish Indica rice from Japonica rice. Accordingly, the as-developed sensor delivers a strategic material to develop high-performance RT electronic nose equipment for monitoring rice quality.

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Low concentration isopropanol gas sensing properties of Ag nanoparticles decorated In2O3 hollow spheres

Cited by 68 publications

References 63 publications

Metal oxide semiconductor gas sensing materials for early lung cancer diagnosis

Metal oxide semiconductor gas sensing materials for early lung cancer diagnosis

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Oxygen vacancy engineering on cerium oxide nanowires for room-temperature linalool detection in rice aging

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