Ag nanoparticle embedded-ZnO nanorods synthesized via a photochemical method and its gas-sensing properties

Xiang, Qun; Meng, Gui-Fang; Zhang, Yuan; Xu, Jiaqiang; Xu, Pengcheng; Qin, Pan; Yu, Weijun

doi:10.1016/j.snb.2009.10.007

Cited by 242 publications

(141 citation statements)

References 34 publications

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“…The responses to 10 ppm ~ 100 ppm C 2 H 5 OH ranged from 42.4 to 210 in the SnO 2 NW sensor, this is significantly enhanced to 188 to 634 by loading Ag onto the sensor. The C 2 H 5 OH response of the Ag-SnO 2 NW sensors in the present study is higher than the Ag-loaded TiO 2 nanobelts [17], the Ag-loaded ZnO nanorods [18], and the Ag-loaded TiO 2 spherical heterostructures [19]. In particular, considering the very high response to 10 ppm C 2 H 5 OH(R a /R g = 188), detection of sub-ppm levels of C 2 H 5 OH seems to be possible using Ag-loaded SnO 2 NW networks.…”

Section: Gas Sensing Characteristicscontrasting

confidence: 53%

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO₂Nanowires

Hwang¹,

Lee²

2012

Journal of Sensor Science and Technology

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Ag-and Pd-loaded SnO 2 nanowire network sensors were prepared by the growth of SnO 2 nanowires via thermal evaporation, the coating of slurry containing SnO 2 nanowires, and dropping of a droplet containing Ag or Pd nanoparticles, and subsequent heat treatment. All the pristine, Pd-loaded and Ag-loaded SnO 2 nanowire networks showed the selective detection of C 2 H 5 OH with low cross-responses to CO, H 2 , C 3 H 8 , and NH 3 . However, the relative gas responses and gas selectivity depended closely on the catalyst loading. The loading of Pd enhanced the responses(R a /R g : R a : resistance in air, R g : resistance in gas) to CO and H 2 significantly, while it slightly deteriorated the response to C 2 H 5 OH. In contrast, a 3.1-fold enhancement was observed in the response to 100 ppm C 2 H 5 OH by loading of Ag onto SnO 2 nanowire networks. The role of Ag catalysts in the highly sensitive and selective detection of C 2 H 5 OH is discussed.

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Section: Gas Sensing Characteristicscontrasting

confidence: 53%

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO₂Nanowires

Hwang¹,

Lee²

2012

Journal of Sensor Science and Technology

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“…For sample Fe 2 O 3 -RGO, the CV curves are a bit different from the curves of RGO because the overall capacitance of Fe 2 O 3 -RGO derives from the combined contribution of the redox pseudocapacitance of Fe 2 O 3 and the EDL capacitance of graphene in the composite, while the capacitance of RGO is from EDL capacitance [47]. Furthermore, the CV curve of the Fe 2 O 3 -RGO electrode exhibits nearly a mirrorimage current response on voltage reversal indicating an excellent capacitive property and good reversibility [48]. It is obvious that Fe 2 O 3 -RGO electrode shows higher integrated area than RGO electrode, indicating the synergistic effect of RGO and Fe 2 O 3 .…”

Section: Resultsmentioning

confidence: 96%

Facilely synthesized Fe2O3–graphene nanocomposite as novel electrode materials for supercapacitors with high performance

Wang

et al. 2013

Journal of Alloys and Compounds

146

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a b s t r a c tFe 2 O 3 -graphene nanocomposite with high capacitive properties had been prepared friendly and facilely by hydrothermal method in one-step. The morphology and structure of the obtained material were examined by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and transmission electron microscope (TEM) techniques. It was revealed by TEM images that Fe 2 O 3 nanoparticles grow well on the surface of graphene and the formation of Fe 2 O 3 nanoparticles hinders the aggregation of graphene (reduced graphene oxide, namely, RGO). Electrochemical properties of the synthesized materials were characterized by serials of electrochemical measurements in 1 M Na 2 SO 4 electrolyte. Fe 2 O 3 -graphene nanocomposite electrode show higher specific capacitance than graphene, indicating an accelerative effect of Fe 2 O 3 and graphene on improving the electrochemical performance of the electrode. The specific capacitance of Fe 2 O 3 -graphene nanocomposite is 226 F/g at a current density of 1 A/g. These attractive results indicate it is possible to seek and develop the promising, environmentally benign and commercial electrodes material based on Fe 2 O 3 and graphene.Crown

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“…The good selectivity can be well explained by an electron-liberate theory [49], the reducing ability of the test gas [50] (referring to the degree of difficulty of the receiving and losing electrons of the test gas in an oxidation-reduction reaction) and the bond energy of the test gas [51,52]. Since the operating temperature of the nano-SnO 2 flat-type coplanar gas sensor arrays is 400°C, O 2− is the dominating species of chemisorbed oxygen on the surface and grain boundaries [50,53].…”

Section: Characterization Of Nano-sno 2 Powdersmentioning

confidence: 85%

“…At the same concentration of the test gas, the more the liberated electrons, the higher the response [49,50]. So it seems that the order of the response should be xy-…”

Section: Characterization Of Nano-sno 2 Powdersmentioning

confidence: 99%

2-Methyl-2,4-pentanediol gas sensor properties of nano-SnO2 flat-type coplanar gas sensing arrays at low detection limit

Zhu

Huang²,

Yuan

et al. 2014

Materials Science-Poland

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Nano-SnO 2 flat-type coplanar 2-Methyl-2,4-pentanediol (MPD) gas sensor arrays were fabricated by a screen-printing technique based on nano-SnO 2 powders prepared by a hydrothermal method. The results show that the fabricated gas sensor arrays have good MPD gas sensing characteristics, such as good selectivity and response-recovery characteristics. Especially, they can be used for detecting the concentration of MPD gas as low as 1 ppm which is much lower than the legal concentration of 20 ppm or 25 ppm. The good sensing properties indicate that the SnO 2 gas sensor arrays have great potential for on-line or portable monitoring of MPD gas in practical environments.

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Ag nanoparticle embedded-ZnO nanorods synthesized via a photochemical method and its gas-sensing properties

Cited by 242 publications

References 34 publications

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO₂Nanowires

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO₂Nanowires

Facilely synthesized Fe2O3–graphene nanocomposite as novel electrode materials for supercapacitors with high performance

2-Methyl-2,4-pentanediol gas sensor properties of nano-SnO2 flat-type coplanar gas sensing arrays at low detection limit

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Ag nanoparticle embedded-ZnO nanorods synthesized via a photochemical method and its gas-sensing properties

Cited by 242 publications

References 34 publications

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO2Nanowires

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO2Nanowires

Facilely synthesized Fe2O3–graphene nanocomposite as novel electrode materials for supercapacitors with high performance

2-Methyl-2,4-pentanediol gas sensor properties of nano-SnO2 flat-type coplanar gas sensing arrays at low detection limit

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Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO₂Nanowires

Highly Sensitive and Selective Gas Sensors Using Catalyst-Loaded SnO₂Nanowires