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Eu3+-doped Bi2MoO6 phosphors for highly sensitive and visible H2S gas indicator material: optical and color properties, and gas sensing performance

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Abstract

${\rm Bi}_2{\rm MoO}_6\!:\!{{\rm Eu}^{3 +}}$ phosphors were synthesized by a solid state reaction, and ${\rm H}_2{\rm S}$ gas sensing performance was investigated. The ${\rm Bi}_2{\rm MoO}_6\!:\!{{\rm Eu}^{3 +}}$ phosphors showed an excellent red emission due to f-f transition of ${{\rm Eu}^{3 +}}$. Owing to the exposure to ${\rm H}_2{\rm S}$ gas, the emission intensity of the phosphors dramatically decreased to 40% of the initial value. The body color of the phosphor changed from yellow-white to dark brown. The response of the ${\rm Bi}_2{\rm MoO}_6\!:\!{{\rm Eu}^{3 +}}$ phosphors for ${\rm H}_2{\rm S}$ gas was started from 10 ppm, and the emission intensity exponentially decreased with increasing the concentration until 500 ppm.

© 2021 Optical Society of America

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Supplementary Material (1)

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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