Gas sensing properties of volume-doped CoTiO3 synthesized via polyol method

Siemons, Maike; Simon, Ulrich

doi:10.1016/j.snb.2007.04.009

Cited by 72 publications

(33 citation statements)

References 14 publications

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“…The assynthesized ZnO nanorods exhibit higher response to LPG (502), whereas it shows a considerably lower response (≤54.71) to H 2 , CO, CO 2 and ethanol. In order to quantify the selectivity to LPG, the selectivity coefficient (K) was calculated further according to the definition [14]:…”

Section: Resultsmentioning

confidence: 99%

Rapid and Template Free Synthesis of ZnO Nanorods and Analysis of their LPG Sensing Properties

2016

IJSR

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ZnO nanorods (diameters∼25 nmand lengths∼145-150 nm) were synthesized by using a simple solochemical method and their LPG sensing properties were investigated. The ZnO nanorods exhibited outstanding gas sensingcharacteristics such as, higher gas response (∼502 to 50ppm LPG at 300 •C), extremely rapid response(∼6-7 s), fast recovery (∼6-7 s), excellent reproducibility, good sensing selectivity and relatively lower operating temperature(∼300•C). The experimental results clearly demonstrate the potentialof using the ZnO nanorods as sensing material in the fabrication of LPG sensors.

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Section: Resultsmentioning

confidence: 99%

Rapid and Template Free Synthesis of ZnO Nanorods and Analysis of their LPG Sensing Properties

2016

IJSR

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“…©IJRASET (UGC Approved Journal): All Rights are Reserved In order to quantify the selectivity of NH 3 , the selectivity was calculated according to definition [31]:…”

Section: E Gas Sensing Performance 1) Selectivity Of Ppy-ag Nanocompmentioning

confidence: 99%

Selective and Sensitive Room Temperature Detection of Ammonia by PPy-Ag Nanocomposite

Nerkar¹

2018

IJRASET

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This paper describes synthesis of polypyrrole-silver nanocomposite (PPy-Ag-NC) via in situ chemical oxidative polymerization of pyrrole, based on colloidal suspension of silver nanoparticles. The structure analysis of synthesized nanocomposite was done by Fourier transform infrared (FTIR) spectroscopy. Transmission electron microscopy (TEM) micrographs showed spherical Ag nanoparticles of about 38-60 nm were embedded in the PPy matrix. Scanning Electron Microscopy (SEM) photo graphs revealed formation of uniform granular morphology. X-ray diffraction (XRD) pattern shows broad peak at 2 = 25.3o suggesting that PPy is amorphous, but peaks at 2θ values of 38.2°, 44.5°, 64.3° and 78.4° corresponding to face centered cubic silver. Room temperature ammonia gas sensing behaviour of PPy-Ag nanocomposite films were examined. Gas sensing tests demonstrated that the composite films exhibited a fast response (58s to 153s), rapid recovery (347s to 746s) and high sensitivity and sensitivity at room temperature with a detection of low concentration (50 to 500 ppm) of ammonia gas. The experimental result demonstrates the potential of using PPy-Ag nanocomposite as sensing material for the fabrication of room temperature operating ammonia sensor.

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“…Nanocrystalline CoTiO 3 thick films doped with La, Sm, Gd, Ho, Li, Na, K, Pb, and Sb at 2 atom% were shown to exhibit p-type semiconductivity and to respond to both ethanol and propylene [97]. Both, the particle size and response also depended on the dopant used, with the undoped material showing no pronounced selectivity to ethanol.…”

Section: Nanoionic Materials As Gas Sensorsmentioning

confidence: 99%

“…The use of more complex metal oxides has also been investigated, with nanocrystalline thick films of both barium titanate [96] and cobalt titanate [97] having been considered as possible sensor materials. When the response of such barium titanate films doped with 10% CuO and 10% CdO was studied with respect to CO, LPG, H 2 S, and H 2 [96], sensor selectivity was improved for LPG over the other gases at 250 C. However, the addition of 0.3 wt% Pd resulted in an even greater selectivity to LPG at a lower temperature, of 225 C.…”

Section: Nanoionic Materials As Gas Sensorsmentioning

confidence: 99%

Ion‐Conducting Nanocrystals: Theory, Methods, and Applications

Chadwick

Savin

2009

Solid State Electrochemistry I

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The aim of this chapter is to review the current state of knowledge in ionic materials with crystallite dimensions less than 100 nm, systems which sometimes are referred to as nanoionics. The chapter will detail the preparation, characterization and the important applications of these materials, especially in sensors, solid-state batteries, and fuel cells. Particular focus will be placed on ionic transport in these materials, as this is a topic of considerable contemporary interest, and where conflicting reports exist of enhanced diffusion in nanocrystals. IntroductionNanomaterials are systems that contain particles with one dimension in the nanometer regime. The past decade has witnessed a growing intense interest from biologists, chemists, physicists, and engineers in the application of these materialsthe so-called nanotechnology, which is sometimes referred to as the next industrial revolution [1]. The reasons for such interest are the unusual properties and potential technological applications that are exhibited by these materials when compared to their bulk counterparts [2][3][4][5][6][7][8][9][10]. In this chapter, attention will be focused on rather simple ionic solids, where the interatomic attractions are predominantly coulombic forces, and the dimensions are predominantly <100 nm. Such systems have been termed nanoionics [11,12].There are three dominant reasons for the study of these particular systems:. The simplicity of the interatomic forces means that some of the generic features and problems of nanomaterials should be tractable to theoretical and/or computer modeling approaches for these particular systems. . Many relatively simple ionic compounds, such as binary halides and oxides, in their bulk form have important technological applications as electrolytes, catalysts, Solid State Electrochemistry I: Fundamentals, Materials and their Applications. Edited by Vladislav V. Kharton

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Gas sensing properties of volume-doped CoTiO3 synthesized via polyol method

Cited by 72 publications

References 14 publications

Rapid and Template Free Synthesis of ZnO Nanorods and Analysis of their LPG Sensing Properties

Rapid and Template Free Synthesis of ZnO Nanorods and Analysis of their LPG Sensing Properties

Selective and Sensitive Room Temperature Detection of Ammonia by PPy-Ag Nanocomposite

Ion‐Conducting Nanocrystals: Theory, Methods, and Applications

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