Ag modified bismuth ferrite nanospheres as a chlorine gas sensor

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

doi:10.1039/C8RA06247A

Ag modified bismuth ferrite nanospheres as a chlorine gas sensor

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

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Pure phase bismuth ferrite (BiFeO₃, BFO) nanospheres were synthesized via a sol-gel method, and Ag was loaded on the surface of BFO by photodeposition. The effects of the Ag-modification on the morphologies and microstructural characteristics were investigated using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) analyses. Only BFO peaks but no Ag peaks were observed for all samples in the XRD patterns, which is related to the small size and low loading of Ag. The gas-sensing tests show that the response of 4 mg AgNO₃ modified BiFeO₃ (ABFO4) was 72.62 to 10 ppm Cl₂ at 240 °C, which was 2.5 times higher than that of the pristine BFO. Such outstanding gas sensing performances are attributed to the fact that the presence of Ag not only increases the density of holes and the amount of gas adsorption sites but also has a catalytic effect.

Original language	English
Pages (from-to)	33156-33163
Number of pages	8
Journal	RSC Advances
Volume	8
Issue number	58
DOIs	https://doi.org/10.1039/C8RA06247A
State	Published - 2018

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title = "Ag modified bismuth ferrite nanospheres as a chlorine gas sensor",

abstract = "Pure phase bismuth ferrite (BiFeO3, BFO) nanospheres were synthesized via a sol-gel method, and Ag was loaded on the surface of BFO by photodeposition. The effects of the Ag-modification on the morphologies and microstructural characteristics were investigated using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) analyses. Only BFO peaks but no Ag peaks were observed for all samples in the XRD patterns, which is related to the small size and low loading of Ag. The gas-sensing tests show that the response of 4 mg AgNO3 modified BiFeO3 (ABFO4) was 72.62 to 10 ppm Cl2 at 240 °C, which was 2.5 times higher than that of the pristine BFO. Such outstanding gas sensing performances are attributed to the fact that the presence of Ag not only increases the density of holes and the amount of gas adsorption sites but also has a catalytic effect.",

author = "Qiang Li and Weiming Zhang and Chao Wang and Jiangwei Ma and Li Ning and Huiqing Fan",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2018",

doi = "10.1039/C8RA06247A",

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TY - JOUR

T1 - Ag modified bismuth ferrite nanospheres as a chlorine gas sensor

AU - Li, Qiang

AU - Zhang, Weiming

AU - Wang, Chao

AU - Ma, Jiangwei

AU - Ning, Li

AU - Fan, Huiqing

PY - 2018

Y1 - 2018

N2 - Pure phase bismuth ferrite (BiFeO3, BFO) nanospheres were synthesized via a sol-gel method, and Ag was loaded on the surface of BFO by photodeposition. The effects of the Ag-modification on the morphologies and microstructural characteristics were investigated using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) analyses. Only BFO peaks but no Ag peaks were observed for all samples in the XRD patterns, which is related to the small size and low loading of Ag. The gas-sensing tests show that the response of 4 mg AgNO3 modified BiFeO3 (ABFO4) was 72.62 to 10 ppm Cl2 at 240 °C, which was 2.5 times higher than that of the pristine BFO. Such outstanding gas sensing performances are attributed to the fact that the presence of Ag not only increases the density of holes and the amount of gas adsorption sites but also has a catalytic effect.

AB - Pure phase bismuth ferrite (BiFeO3, BFO) nanospheres were synthesized via a sol-gel method, and Ag was loaded on the surface of BFO by photodeposition. The effects of the Ag-modification on the morphologies and microstructural characteristics were investigated using transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) analyses. Only BFO peaks but no Ag peaks were observed for all samples in the XRD patterns, which is related to the small size and low loading of Ag. The gas-sensing tests show that the response of 4 mg AgNO3 modified BiFeO3 (ABFO4) was 72.62 to 10 ppm Cl2 at 240 °C, which was 2.5 times higher than that of the pristine BFO. Such outstanding gas sensing performances are attributed to the fact that the presence of Ag not only increases the density of holes and the amount of gas adsorption sites but also has a catalytic effect.

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JO - RSC Advances

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ER -

Ag modified bismuth ferrite nanospheres as a chlorine gas sensor

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