TY - JOUR
T1 - Microwave-assisted hierarchical bismuth oxide worm-like nanostructured films as room-temperature hydrogen gas sensors
AU - Shinde, Pritamkumar V.
AU - Ghule, Balaji G.
AU - Shaikh, Shoyebmohamad F.
AU - Shinde, Nanasaheb M.
AU - Sangale, Sushil S.
AU - Jadhav, V. V.
AU - Yoon, Seog Young
AU - Kim, Kwang Ho
AU - Mane, Rajaram S.
N1 - Publisher Copyright:
© 2019
PY - 2019/9/25
Y1 - 2019/9/25
N2 - With a plausible reaction mechanism, a simple and rapid, microwave-assisted chemical synthesis method has been proposed to obtain hierarchical worm-like bismuth oxide (Bi2O3) nanostructured films as an efficient and effective hydrogen (H2) gas sensors. The structural elucidation demonstrates a diffraction peak at 27.94° for [201] directional growth with a lattice fringe distance of 0.31 nm. The Raman shift and photoelectron spectroscopy measurements, additionally, support the formation of the phase pure Bi2O3. Estimated 14.88 m2g-1 specific surface area and 10–20 nm pore-size of as-obtained Bi2O3 evidences its mesoporous character. Among various gases tested, H2 gas endows 50% sensing performance for hierarchical Bi2O3 worm-like film sensors with a considerable response of 42 s and recovery of 83 s for 100 ppm H2 gas concentration at room-temperature, suggesting an importance of proposed method in obtaining the phase pure Bi2O3 film sensors. The H2 gas sensing mechanism has been proposed on X-ray photoelectron spectroscopy results. Finally, an influence of a relative humidity on the Bi2O3 film sensor has demonstrated 32% response at 20% RH with response/recovery time of just 7/10 s, owing to its unique surface architecture, high surface area and mesoporous nature.
AB - With a plausible reaction mechanism, a simple and rapid, microwave-assisted chemical synthesis method has been proposed to obtain hierarchical worm-like bismuth oxide (Bi2O3) nanostructured films as an efficient and effective hydrogen (H2) gas sensors. The structural elucidation demonstrates a diffraction peak at 27.94° for [201] directional growth with a lattice fringe distance of 0.31 nm. The Raman shift and photoelectron spectroscopy measurements, additionally, support the formation of the phase pure Bi2O3. Estimated 14.88 m2g-1 specific surface area and 10–20 nm pore-size of as-obtained Bi2O3 evidences its mesoporous character. Among various gases tested, H2 gas endows 50% sensing performance for hierarchical Bi2O3 worm-like film sensors with a considerable response of 42 s and recovery of 83 s for 100 ppm H2 gas concentration at room-temperature, suggesting an importance of proposed method in obtaining the phase pure Bi2O3 film sensors. The H2 gas sensing mechanism has been proposed on X-ray photoelectron spectroscopy results. Finally, an influence of a relative humidity on the Bi2O3 film sensor has demonstrated 32% response at 20% RH with response/recovery time of just 7/10 s, owing to its unique surface architecture, high surface area and mesoporous nature.
KW - Hierarchical worm nanostructured films
KW - Hydrogen gas sensors
KW - Microwave-assisted BiO
UR - http://www.scopus.com/inward/record.url?scp=85067583401&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2019.06.182
DO - 10.1016/j.jallcom.2019.06.182
M3 - 文章
AN - SCOPUS:85067583401
SN - 0925-8388
VL - 802
SP - 244
EP - 251
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -