La doped BaTiO3 nanostructures for room temperature sensing of NO2/NH3: Focus on La concentration and sensing mechanism

Patil, Rajendra P.; Hiragond, Chaitanya B.; Jain, G. H.; Khanna, Pawan K.; Gaikwad, V. B.; More, Priyesh V.

doi:10.1016/j.vacuum.2019.04.047

Cited by 29 publications

(8 citation statements)

References 37 publications

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“…Various attempts have been made to improve the selectivity and sensitivity of BaTiO 3 -based sensors using dopants and additives. For example, La has been proposed [95] to increase the response for NO 2 and NH 3 at room temperature. G.N.…”

Section: Batio 3 For Gas-sensing Applicationsmentioning

confidence: 99%

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

et al. 2021

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In this work, a broad overview in the field of strontium titanate (ST, SrTiO3)-, barium titanate (BT, BaTiO3)- and barium strontium titanate (BST, BaSrTiO3)-based gas sensors is presented and discussed. The above-mentioned materials are characterized by a perovskite structure with long-term stability and therefore are very promising materials for commercial gas-sensing applications. Within the last 20 years, the number of papers where ST, BT and BST materials were tested as gas-sensitive materials has ten times increased and therefore an actual review about them in this field has been expected by readers, who are researchers involved in gas-sensing applications and novel materials investigations, as well as industry research and development center members, who are constantly searching for gas-sensing materials exhibiting high 3S parameters (sensitivity, selectivity and stability) that can be adapted for commercial realizations. Finally, the NO2-sensing characteristics of the BST-based gas sensors deposited by the authors with the utilization of magnetron sputtering technology are presented.

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Section: Batio 3 For Gas-sensing Applicationsmentioning

confidence: 99%

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

et al. 2021

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“…Typically for 0.2Sn size found to be 38.40 nm, for 0.4Sn it found to be 39.54 nm, for 0.6Sn and 0.8Sn size found to be 40.19 nm and 40.21 nm, respectively. It is well documented that as the dopant added in base material the grain size is increased [24]. The electronic conductivity of the ABO 3 (Perovskite) type LaCrO 3 is improved by doping with divalent ion on either A La (1.15 A) site or B Cr (0.67 A) site.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Modified Sn-doped LaCrO3 nanostructures: focus on their characterization and applications as ethanol sensor at a lower temperature

Shinde

Sawant

Kapadnis³

2019

J Nanostruct Chem

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The present work emphasizes the effect of the use of Sn, with different concentrations, over the structural properties and sensing applications of LaCrO 3 . In this work, LaCrO 3 nanostructures were modified with different concentration of Sn (0.2 M %, 0.4 M %, 0.6 M % and 0.8 M %).Different modified Sn-doped LaCrO 3 was synthesized by sol-gel method and followed by preparation of thick films via a conventional screen printing approach. The characterizations done by means of X-ray diffraction (XRD), energy-dispersive X-ray (EDX), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed the confirmation of a Sn-doped LaCrO 3 crystal structure and its morphology, respectively. These oxides were formulated to identify various air pollutants such as CO 2 , ethanol, H 2 S, NH 3 , NO 2, and acetone. The Sn-doped LaCrO3 with 0.4 M % Sn displayed higher gas response to ethanol vapor at the range of 150-250 °C. The sensors additionally demonstrated proper recovery and acceptable stability. Graphic abstractThe graphical abstract demonstrates the in situ synthesis of Sn-doped LaCrO 3 by sol-gel method. Similarly, it shows its characterization and finally, the thick films of doped Sn demonstrate best selectivity for ethanol.Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creat iveco mmons .org/licen ses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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“…Doping is a feasible and successful method for enhancing gas sensing performance. − Theoretical investigation via density functional theory (DFT) calculations indicated that phosphorene could show the adsorption energy toward the NH 3 molecules changed from −0.48 to −2.64 eV after B-doping . Besides, the experimental investigation by Yu et al has revealed that the sensitivity of sulfur-doped graphene oxide (S-GO) for 10 ppm of NH 3 was significantly increased up to 73% from 5.2% of the undoped sample .…”

Section: Introductionmentioning

confidence: 99%

Interstitial/Substitutional Se Doping in Nanosheet Heterostructures for Sensing NH₃: Experimental and Theoretical Study

Qin,

Li,

Zhou

et al. 2023

ACS Appl. Nano Mater.

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Two-dimensional (2D) nanosheet heterostructures have recently shown superior room-temperature (RT) sensitivity in detecting trace ammonia (NH 3 ) recently. However, the low response and sluggish response kinetic process toward NH 3 are still challenging issues. Here, we propose a strategy of substitutional and interstitial doping of selenium (Se) into the 2D SnS/SnS 2 nanosheet heterostructures, effectively improving the NH 3 -sensitive capability at RT. The facile one-step hydrothermal method was adopted to synthesize the Se S −SnS/SnS 2 (substitutional) and Se i −SnS/SnS 2 (interstitial) nanocomposites. Also, the successful substitutional or interstitial doping of Se into both layers of SnS and SnS 2 of the SnS/SnS 2 heterostructure was verified by the detailed XRD characterization. After exposure to 10 ppm of NH 3 , the Se S −SnS/SnS 2 sensors show a response of 11.46. Comparatively, the sensor based on Se i −SnS/SnS 2 achieves a higher response (16.46), which is 13 times beyond the undoped SnS/ SnS 2 to 10 ppm of NH 3 with the response time (t res ) only of 3 s. The superior NH 3 -sensing characteristics of Se codoped nanosheet heterostructures are further investigated by combining band alignment and first-principles calculations. It clarifies that the lattice symmetry breaking due to Se doping provides more active sites for NH 3 adsorption. In addition, the Se-doping increases the width of the space charge layer at the heterogeneous interface, leading more oxygen species to promote the adsorption and reaction with more NH 3 molecules on the surface. This result lights a way for future research on gas detection through synergistic doping heterostructure materials.

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La doped BaTiO3 nanostructures for room temperature sensing of NO2/NH3: Focus on La concentration and sensing mechanism

Cited by 29 publications

References 37 publications

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

Modified Sn-doped LaCrO3 nanostructures: focus on their characterization and applications as ethanol sensor at a lower temperature

Interstitial/Substitutional Se Doping in Nanosheet Heterostructures for Sensing NH₃: Experimental and Theoretical Study

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La doped BaTiO3 nanostructures for room temperature sensing of NO2/NH3: Focus on La concentration and sensing mechanism

Cited by 29 publications

References 37 publications

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

Modified Sn-doped LaCrO3 nanostructures: focus on their characterization and applications as ethanol sensor at a lower temperature

Interstitial/Substitutional Se Doping in Nanosheet Heterostructures for Sensing NH3: Experimental and Theoretical Study

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Interstitial/Substitutional Se Doping in Nanosheet Heterostructures for Sensing NH₃: Experimental and Theoretical Study