The formaldehyde sensitivity of LaFe sub(1-x)Zn sub(x)O sub(3)-based gas sensor

Rare earth oxides LaFe sub(1-x)Zn sub(x)O sub(3) were synthesized by sol-gel method. The X-ray diffraction patterns (XRD) showed that LaFe sub(1-x)Zn sub(x)O sub(3)oxides are single phase with orthorhombic perovskite structure, they all show p-type semiconducting properties. Among nanocrystalline La...

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Published in:Journal of materials science 2007-12, Vol.42 (24), p.9973-9977
Main Authors: Huang, Shanxing, Qin, Hongwei, Song, Peng, Liu, Xing, Li, Lun, Zhang, Rui, Hu, Jifan, Yan, Hongdan, Jiang, Minhua
Format: Article
Language:English
Subjects:
Density
Formaldehyde
Lattice parameters
Nanocrystals
Optimization
Oxides
P-type semiconductors
X-rays
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container_issue 24
container_start_page 9973
container_title Journal of materials science
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creator Huang, Shanxing
Qin, Hongwei
Song, Peng
Liu, Xing
Li, Lun
Zhang, Rui
Hu, Jifan
Yan, Hongdan
Jiang, Minhua
description Rare earth oxides LaFe sub(1-x)Zn sub(x)O sub(3) were synthesized by sol-gel method. The X-ray diffraction patterns (XRD) showed that LaFe sub(1-x)Zn sub(x)O sub(3)oxides are single phase with orthorhombic perovskite structure, they all show p-type semiconducting properties. Among nanocrystalline LaFe sub(1-x)Zn sub(x)O sub(3) oxides, LaFe sub(0.77)Zn sub(0.23)O sub(3) exhibits the highest sensitivity of 44.5 to 100 ppm formaldehyde. The optimal working temperature was found to be around 240 C. Moreover the LaFe sub(0.77)Zn sub(0.23)O sub(3) exhibites short response and recovery time to 100 ppm formaldehyde. The lattice parameter doesn't agree with Vegard's law with the increasing Zn content, and the relative density was 70-80%.
doi_str_mv 10.1007/s10853-007-1991-1
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subjects Density
Formaldehyde
Lattice parameters
Nanocrystals
Optimization
Oxides
P-type semiconductors
X-rays
title The formaldehyde sensitivity of LaFe sub(1-x)Zn sub(x)O sub(3)-based gas sensor
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