Highly Selective Sensing of CO, C6H6, and C7H8 Gases by Catalytic Functionalization with Metal Nanoparticles

Kim, Jae‐Hun; Wu, Ping; Kim, Hyoun Woo; Kim, Sang Sub

doi:10.1021/acsami.6b01116

Cited by 89 publications

(49 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates the high catalytic effect of Pt NPs toward C 7 H 8 . Similar selective and enhanced catalysis behaviors of C 7 H 8 by Pt NPs have been reported in our earlier studies [10,35], which show that the Pt NPs exhibit efficient catalytic activity for enhancing the diffusion and interaction with C 7 H 8 gas compared to other reducing gases.…”

Section: Resultssupporting

confidence: 87%

“…According to the earlier investigation [34], functionalization of Pt NPs resulted in enhanced sensitive and selective toluene-sensing behavior of the core-shell nanowires. A more recent work [35] revealed the special role of Pt in relation to the toluene sensing based on Density Functional Theory (DFT) calculations. In the previous work [10], Pt-loaded SnO 2 NFs were synthesized and tested, in which Pt NPs were synthesized in a separate process and mixed with the electrospinning solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of Toluene-Sensing Performance of SnO2 Nanofibers by Pt Functionalization

Kim

Abideen

Yong

et al. 2016

Sensors

Self Cite

View full text Add to dashboard Cite

Functionalization of metal nanoparticles (NPs) on oxide materials is a commonly employed technique for enhancing the sensitivity and selectivity of materials for gas sensing applications. In this study, we functionalized electrospinning-synthesized SnO2 nanofibers (NFs) with various amounts of Pt NPs to enhance the toluene-sensing properties. In particular, Pt NPs were prepared by deposition of Pt films by sputtering and subsequent heat treatment. Electronic and chemical sensitizations by the Pt NPs were responsible for the improved toluene sensitivity. The best sensing properties were achieved at an optimized amount of Pt NPs, showing a volcano shape in relation to the amount of Pt NPs. The method used in this study is useful for the development of toluene-sensitive and -selective chemiresistive NF-based gas sensors.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Improvement of Toluene-Sensing Performance of SnO2 Nanofibers by Pt Functionalization

Kim

Abideen

Yong

et al. 2016

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…SnO 2 is one of the best materials for VOC sensors because of its high sensitivity. For example, Pt-loaded SnO 2 nanowires show effective selectivity to 1 ppm toluene as a lung cancer-related VOC [30], and open pores of SnO 2 surfaces induce strong responses to toluene [31]. In the prototype system, the GC columns function in selectivity; thus, the semiconductive gas sensors function as detectors.…”

Section: Introductionmentioning

confidence: 99%

Development of an Exhaled Breath Monitoring System with Semiconductive Gas Sensors, a Gas Condenser Unit, and Gas Chromatograph Columns

Itoh

Miwa

Tsuruta

et al. 2016

Sensors

View full text Add to dashboard Cite

Various volatile organic compounds (VOCs) in breath exhaled by patients with lung cancer, healthy controls, and patients with lung cancer who underwent surgery for resection of cancer were analyzed by gas condenser-equipped gas chromatography-mass spectrometry (GC/MS) for development of an exhaled breath monitoring prototype system involving metal oxide gas sensors, a gas condenser, and gas chromatography columns. The gas condenser-GC/MS analysis identified concentrations of 56 VOCs in the breath exhaled by the test population of 136 volunteers (107 patients with lung cancer and 29 controls), and selected four target VOCs, nonanal, acetoin, acetic acid, and propanoic acid, for use with the condenser, GC, and sensor-type prototype system. The prototype system analyzed exhaled breath samples from 101 volunteers (74 patients with lung cancer and 27 controls). The prototype system exhibited a level of performance similar to that of the gas condenser-GC/MS system for breath analysis.

show abstract

“…Consequently, the concentration of electrons on the surface decreases, and accordingly, the resistance of the [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. In this study, the work function of SnO 2 nanowires was measured to be 4.8 eV.…”

Section: Gas Sensing Mechanismmentioning

confidence: 92%

Low-Temperature H2S Sensors Based on Si-Coated SnO2 Nanowires

Choi¹,

Mirzaei²,

Bang³

et al. 2019

Korean J. Met. Mater.

Self Cite

View full text Add to dashboard Cite

To attain high life standards, it is important to develop high-performance non-toxic gas sensors for public safety, environmental pollutant control, industrial processes, etc. Because reports on single element semiconductor-coated semiconducting metal oxides for sensing applications are rare, we synthesized SnO 2 nanowires and coated them with a 5 nm-thick or 10 nm-thick Si layer for H 2 S gas sensing studies. SnO 2 nanowires were successfully synthesized using a highly pure metallic Sn powder at high temperature in a tube furnace by the vapor-liquid-solid method and Si was deposited on the nanowires by the sputtering technique. The desired morphology and composition of the synthesized nanowires were confirmed by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. Moreover, the gas sensing characteristics of pristine and Si-coated SnO 2 nanowires toward H 2 S, CO, H 2 , C 6 H 6 , C 2 H 5 OH and C 6 H 7 gases were investigated. The sensing results revealed a good response to H 2 S at the optimum operational temperature of 100°C. Notably, Si-coated SnO 2 nanowire sensors showed a better response to H 2 S than pristine SnO 2 nanowires. The mechanism of H 2 S sensing is discussed in detail here. This study shows that the Si coating on the SnO 2 nanowire enhances its sensing performance and decreases the sensing temperature required for H 2 S gas detection.

show abstract

Highly Selective Sensing of CO, C₆H₆, and C₇H₈ Gases by Catalytic Functionalization with Metal Nanoparticles

Cited by 89 publications

References 66 publications

Improvement of Toluene-Sensing Performance of SnO2 Nanofibers by Pt Functionalization

Improvement of Toluene-Sensing Performance of SnO2 Nanofibers by Pt Functionalization

Development of an Exhaled Breath Monitoring System with Semiconductive Gas Sensors, a Gas Condenser Unit, and Gas Chromatograph Columns

Low-Temperature H<sub>2</sub>S Sensors Based on Si-Coated SnO<sub>2</sub> Nanowires

Contact Info

Product

Resources

About