Ag modified bismuth ferrite nanospheres as a chlorine gas sensor

Li, Qiang; Zhang, Weiming; Wang, Chao; Ma, Jiangwei; Li, Ning; Fan, Huiqing

doi:10.1039/c8ra06247a

Cited by 27 publications

(14 citation statements)

References 40 publications

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“…4. The impedance Z and modulus M are usually applied to describe the influence of grain and grain boundary effect in BNT-based ceramics [1,36,37]. Complex AC impedance curves of the BNKTBZ-xFN at 873 K and BNKTBZ-2FN ceramic at various temperatures are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Wang

Yadav

et al. 2020

SN Appl. Sci.

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The innovative 0.94Bi 0.50 (Na 0.78 K 0.22) 0.50 Ti 1−x (Fe 0.50 Nb 0.50) x O 3-0.06BaZrO 3 (BNKTBZ-xFN) lead-free relaxor ceramics were designed and fabricated by the conventional solid-state technique. The dielectric, ferroelectric, energy storage, and impedance performance of these ceramics were investigated systematically. XRD patterns revealed that the (Fe 0.50 Nb 0.50) 4+ complex ions had completely dissolved in the lattice and constructed a single solid-solution. The addition of (Fe 0.50 Nb 0.50) 4+ complex ions had an obvious impact on the grain size and crystallinity of BNKTBZ-xFN ceramics, which led to a large dielectric breakdown strength. In addition, the degree of diffusivity (γ) for BNKTBZ-xFN ceramics were increased from ~ 1.72 to ~ 1.93, indicating an enhanced relaxor behavior with the doping of (Fe 0.50 Nb 0.50) 4+ complex ions. The highest recoverable energy density (W rec) ~ 1.20 J/cm 3 and energy-storage efficiency (η) ~ 72% were attained at 120 kV/cm for BNKTBZ-2FN ceramic with the excellent fatigue resistance. Therefore, the BNKTBZ-2FN ceramic might be a promising candidate for energy-storage electronic devices.

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Section: Resultsmentioning

confidence: 99%

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Wang

Yadav

et al. 2020

SN Appl. Sci.

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“…Few studies have been reported on the Cl 2 detection properties of Ag-loaded sensors. Li et al [ 50 ] illustrated the effect of Ag loading on the Cl 2 response of bismuth ferrite (BiFeO 3 , BFO) nanospheres (BFO NSs); they synthesized BFO NSs using a sol–gel route and successively loaded Ag NP onto BFO NSs via a photodeposition technique. Typically, BFO has a distinct surface reactivity, O 2 adsorption ability, and a narrow band gap, which are beneficial for improving the gas-sensing characteristics.…”

Section: Ag-decorated/loaded Gas Sensorsmentioning

confidence: 99%

“…Here, Ag NPs might also be used as distinct adsorption sites for O 2 and Cl 2 . Furthermore, at the Ag/BFO interface, a Schottky junction was created that decreased the intergranular barriers and enhanced the interfacial effect [ 50 ].…”

Section: Ag-decorated/loaded Gas Sensorsmentioning

confidence: 99%

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Effect of Ag Addition on the Gas-Sensing Properties of Nanostructured Resistive-Based Gas Sensors: An Overview

Navale

Shahbaz

Mirzaei

et al. 2021

Sensors

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Nanostructured semiconducting metal oxides (SMOs) are among the most popular sensing materials for integration into resistive-type gas sensors owing to their low costs and high sensing performances. SMOs can be decorated or doped with noble metals to further enhance their gas sensing properties. Ag is one of the cheapest noble metals, and it is extensively used in the decoration or doping of SMOs to boost the overall gas-sensing performances of SMOs. In this review, we discussed the impact of Ag addition on the gas-sensing properties of nanostructured resistive-based gas sensors. Ag-decorated or -doped SMOs often exhibit better responsivities/selectivities at low sensing temperatures and shorter response times than those of their pristine counterparts. Herein, the focus was on the detection mechanism of SMO-based gas sensors in the presence of Ag. This review can provide insights for research on SMO-based gas sensors.

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“…Therefore, BiFeO 3 exhibits excellent gas sensing properties. However, only a handful of relevant articles have been published, most of whose application objectives are inorganic gases and limited VOCs such as acetone and ethanol [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. Most of these reports indicate that BiFeO 3 is very sensitive to alcohols and ketones and the gas sensitivities of BiFeO 3 sensors are influenced by their morphology and particle size.…”

Section: Introductionmentioning

confidence: 99%

Fast Response Isopropanol Sensing Properties with Sintered BiFeO3 Nanocrystals

Wei

et al. 2020

Materials

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BiFeO3 nanocrystals were applied as the sensing material to isopropanol. The isopropanol sensor based on BiFeO3 nanocrystals shows excellent gas-sensing properties at the optimum working temperature of 240 °C. The sensitivity of as-prepared sensor to 100 ppm isopropanol is 31 and its response and recovery time is as fast as 6 and 17 s. The logarithmic curves of the sensitivity and concentration of BiFeO3 sensors are a very good linear in the low detection range of 2–100 ppm. In addition, the gas sensing mechanism is also discussed. The results suggest that the BiFeO3 nanomaterial can be potentially applied in isopropanol gas detection.

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Ag modified bismuth ferrite nanospheres as a chlorine gas sensor

Abstract: Cl2 sensing properties were remarkably enhanced for Ag modified BFO nanospheres.

Cited by 27 publications

References 40 publications

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Effect of Ag Addition on the Gas-Sensing Properties of Nanostructured Resistive-Based Gas Sensors: An Overview

Fast Response Isopropanol Sensing Properties with Sintered BiFeO3 Nanocrystals

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