Synthesis of Au@SnO2 core–shell nanoparticles with controllable shell thickness and their CO sensing properties

Song, Hyeon-Min; Chon, Bumsoo; Jeon, Seol-Hee; Rai, Prabhakar; Yu, Yeon–Tae; Dutta, Prabir K.

doi:10.1016/j.matchemphys.2015.09.031

Cited by 30 publications

(21 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peaks seen at 2θ values of 26.58°, 33.87°, 37.95°, 38.98°, 42.64°, 51.77°, 54.76°,61.88°, and 65.97° can be associated with (1 1 0), (1 0 1), (2 0 0), (111), (210), (2 1 1), (2 2 0), (3 1 0), (3 0 1) respectively [ 36 ]. The observed standard (hkl) planes, when matched, finalized that the product SnO 2 is pure [ 39 ]. Having a structure with the literature values (JCPDS card no.…”

Section: Resultsmentioning

confidence: 99%

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

View full text Add to dashboard Cite

The exhaust gases from various sources cause air pollution, which is a leading contributor to the global disease burden. Hence, it has become vital to monitor and control the increasing pollutants coming out of the various sources into the environment. This paper has designed and developed a sensor material to determine the amount of carbon monoxide (CO), which is one of the major primary air pollutants produced by human activity. Nanoparticle-based sensors have several benefits in sensitivity and specificity over sensors made from traditional materials. In this study, tin oxide (SnO2), which has greater sensitivity to the target gas, is selected as the sensing material which selectively senses only CO. Tin oxide nanoparticles have been synthesized from stannous chloride dihydrate chemical compound by chemical precipitation method. Palladium, at the concentration of 0.1%, 0.2%, and 0.3% by weight, was added to tin oxide and the results were compared. Synthesized samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) techniques. XRD revealed the tetragonal structure of the SnO2 nanoparticles and FESEM analysis showed the size of the nanoparticles to be about 7–20 nm. Further, the real-time sensor testing was performed and the results proved that the tin oxide sensor, doped with 0.2% palladium, senses the CO gas more efficiently with greater sensitivity.

show abstract

Section: Resultsmentioning

confidence: 99%

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

View full text Add to dashboard Cite

show abstract

“…The lower responses of 1.5 and 3 mol% Au‐SnO 2 NRs compared with the pure SnO 2 can be explained as follows. Au NPs are thermally unstable at high temperatures; thus, their shape and size may be modified at high operating temperatures . The Au NPs may agglomerate, thereby reducing the total area of the catalyst surface .…”

Section: Resultsmentioning

confidence: 99%

“…At low nanoparticle concentrations, the Au nanoparticles may not be well dispersed because the response is strongly enhanced with increasing gold dispersion . Finally, because the adsorbed oxygen species on 3 mol% Au‐SnO 2 NRs did not increase compared with the SnO 2 NRs, as inferred from the XPS results and in the case of the screening effect, the deposition of Au on SnO 2 NPs reduces the surface area available for interaction with xylene gas, thereby decreasing the response . Further studies on the mechanism are required.…”

Section: Resultsmentioning

confidence: 99%

“…Au NPs are thermally unstable at high temperatures; thus, their shape and size may be modified at high operating temperatures. 17 The Au NPs may agglomerate, thereby reducing the total area of the catalyst surface. 50 At low nanoparticle concentrations, the Au nanoparticles may not be well dispersed because the response is strongly enhanced with increasing gold dispersion.…”

Section: Resultsmentioning

confidence: 99%

“…Metal oxide semiconductor gas sensors have advanced greatly owing to developments in nanoscience and nanotechnology. [12][13][14][15][16] SnO 2 , an n-type semiconductor with a wide band gap of 3.62 eV, 17 has been widely used in applications including solar cells, 18 catalytic support materials, 19 solid-state chemical sensors, 20 and high-capacity lithium-storage 21 due to its superior electrical, optical, and electrochemical properties. The gas-sensing applications of SnO 2 have been investigated extensively since the pioneering work of Seiyama et al and Taguchi.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Au‐nanoparticle‐decorated SnO₂ nanorod sensor with enhanced xylene‐sensing performance

Feng

Teng

et al. 2017

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In this work, pure and Au‐nanoparticle‐decorated SnO2 nanorods were prepared via a one‐step hydrothermal method combined with a facile deposition process, and then characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, high‐resolution transmission electron microscopy, and X‐ray photoelectron spectroscopy. The xylene‐sensing performance of the nanorods was also investigated. The results show that Au nanoparticles with an average diameter of 4‐6 nm were immobilized on the surface of rutile SnO2 nanorods. As the amount of Au increased, the surface‐adsorbed oxygen species gradually increased. The 12 mol% Au‐SnO2 nanorods exhibited the highest response to 50 ppm xylene, a lower operating temperature (279 to 255°C), favorable selectivity, and fast response‐recovery speed (3 and 4 seconds, respectively). These properties made the fabricated nanorods good candidates for xylene detection. The possible mechanism for the enhanced xylene‐sensing performance is discussed.

show abstract

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO₂@Eu(MABA‐Si) luminescence nanoparticles

Bai

et al. 2016

Luminescence

View full text Add to dashboard Cite

This article reports a novel category of coating structure SiO @Eu(MABA-Si) luminescence nanoparticles (NPs) consisting of a unique organic shell, composed of perchlorate europium(III) complex, and an inorganic core, composed of silica. The binary complex Eu(MABA-Si) ·(ClO ) ·5H O was synthesized using HOOCC H N(CONH(CH ) Si(OCH CH ) ) (MABA-Si) and was used as a ligand. Furthermore, the as-prepared silica NPs were successfully coated with the -Si(OCH CH ) group of MABA-Si to form Si-O-Si chemical bonds by means of the hydrolyzation of MABA-Si. The binary complexes were characterized by elemental analysis, molar conductivity and coordination titration analysis. The results indicated that the composition of the binary complex was Eu(MABA-Si) ·(ClO ) ·5H O. Coating structure SiO @Eu(MABA-Si) NPs were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM) and infrared (IR) spectra. Based on the SEM and TEM measurements, the diameter of core-SiO particles was ~400 and 600 nm, and the thickness of the cladding layer Eu(MABA-Si) was ~20 nm. In the binary complex Eu(MABA-Si) ·(ClO ) ·5H O, the fluorescence spectra illustrated that the energy of the ligand MABA-Si transferred to the energy level for the excitation state of europium(III) ion. Coating structure SiO @Eu(MABA-Si) NPs exhibited intense red luminescence compared with the binary complex. The fluorescence lifetime and fluorescence quantum efficiency of the binary complex and of the coating structure NPs were also calculated. The way in which the size of core-SiO spheres influences the luminescence was also studied. Moreover, the luminescent mechanisms of the complex were studied and explained.

show abstract

Synthesis of Au@SnO2 core–shell nanoparticles with controllable shell thickness and their CO sensing properties

Cited by 30 publications

References 35 publications

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Au‐nanoparticle‐decorated SnO₂ nanorod sensor with enhanced xylene‐sensing performance

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO₂@Eu(MABA‐Si) luminescence nanoparticles

Contact Info

Product

Resources

About

Synthesis of Au@SnO2 core–shell nanoparticles with controllable shell thickness and their CO sensing properties

Cited by 30 publications

References 35 publications

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Au‐nanoparticle‐decorated SnO2 nanorod sensor with enhanced xylene‐sensing performance

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO2@Eu(MABA‐Si) luminescence nanoparticles

Contact Info

Product

Resources

About

Au‐nanoparticle‐decorated SnO₂ nanorod sensor with enhanced xylene‐sensing performance

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO₂@Eu(MABA‐Si) luminescence nanoparticles