Enhancement of Ethanol Vapor Sensing of TiO<sub>2</sub> Nanobelts by Surface Engineering

Hu, Peiguang; Du, Guojun; Zhou, Weijia; Cui, Jingjie; Lin, Jianjian; Liu, Hong; Liu, Duo; Wang, Jing; Chen, Shaowei

doi:10.1021/am100707h

Cited by 190 publications

(117 citation statements)

References 68 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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“…A two-step method is illustrated by Hu et al [55] with Ag clusters on TiO 2 nanobelts. The nanobelts were prepared via an alkaline hydrothermal process using commercial TiO 2 powders, NaOH, HCl and deionized water.…”

Section: Growth Of Tio 2 Nanostructuresmentioning

confidence: 99%

“…Hu et al [55] synthesized four types of TiO 2 nanobelts (TiO 2 untreated nanobelts, TiO 2 surfacecoarsened nanobelts, Ag nanoparticles-TiO 2 untreated nanobelts and Ag nanoparticles-TiO 2 surface-coarsened nanobelts) for the detection of ethanol vapour according to the above-mentioned hydrothermal process. The best performance is obtained for Ag nanoparticlesTiO 2 surface-coarsened nanobelts.…”

Section: Sensing Performance Of Tio 2 1-d Nanostructuresmentioning

confidence: 99%

Nanostructured TiO2 Layers for Photovoltaic and Gas Sensing Applications

Decroly¹,

Krumpmann²,

Debliquy³

et al. 2016

Green Nanotechnology - Overview and Further Prospects

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Titanium dioxide (TiO 2 ) has been an important material for decades, combining numerous attractive properties in terms of economy (low price, large availability) or ecology (nontoxic), as well as broad physical and chemical possibilities. In the last few years, the development of nanotechnologies offered new opportunities, not only in an academic perspective but also with a view to many applications with particular reference to the environment. This chapter focuses on the many ways that allow to tailor and organize TiO 2 crystallites at the nanometre scale to make the most of this amazing material in the field of photovoltaics and gas sensing.

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“…To date, 1-D TiO 2 nanostructures have been produced by a wide variety of processes such as hydrothermal [11,12], electrospinning [13,14], anodization [15,16], nanocarving [17,18], UV lithography [19], and thermal oxidization [20] process. Among these, the process thermal oxidation is attractive for mass production because of its low cost and simplicity compared with other techniques.…”

Section: Introductionmentioning

confidence: 99%