TY - JOUR
T1 - Morphology control of aluminum nitride (AlN) for a novel high-temperature hydrogen sensor
AU - Hermawan, Angga
AU - Asakura, Yusuke
AU - Yin, Shu
N1 - Funding Information:
This work was financially support by the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Scientific Research (KAKENHI) (No. 20H00297 and Innovative Areas No. JP16H06439) and the Cooperative Research Program of Dynamic Alliance for Open Innovations Bridging Human, Environment and Materials in the “Network Joint Research Center for Materials and Devices”.
Publisher Copyright:
© 2020, University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2020/11
Y1 - 2020/11
N2 - Hydrogen is a promising renewable energy source for fossil-free transportation and electrical energy generation. However, leaking hydrogen in high-temperature production processes can cause an explosion, which endangers production workers and surrounding areas. To detect leaks early, we used a sensor material based on a wide bandgap aluminum nitride (AlN) that can withstand a high-temperature environment. Three unique AlN morphologies (rod-like, nest-like, and hexagonal plate-like) were synthesized by a direct nitridation method at 1400°C using γ-AlOOH as a precursor. The gas-sensing performance shows that a hexagonal plate-like morphology exhibited p-type sensing behavior and showed good repeatability as well as the highest response (S = 58.7) toward a 750 ppm leak of H2 gas at high temperature (500°C) compared with the rod-like and nest-like morphologies. Furthermore, the hexagonal plate-like morphology showed fast response and recovery times of 40 and 82 s, respectively. The surface facet of the hexagonal morphology of AlN might be energetically favorable for gas adsorption-desorption for enhanced hydrogen detection.
AB - Hydrogen is a promising renewable energy source for fossil-free transportation and electrical energy generation. However, leaking hydrogen in high-temperature production processes can cause an explosion, which endangers production workers and surrounding areas. To detect leaks early, we used a sensor material based on a wide bandgap aluminum nitride (AlN) that can withstand a high-temperature environment. Three unique AlN morphologies (rod-like, nest-like, and hexagonal plate-like) were synthesized by a direct nitridation method at 1400°C using γ-AlOOH as a precursor. The gas-sensing performance shows that a hexagonal plate-like morphology exhibited p-type sensing behavior and showed good repeatability as well as the highest response (S = 58.7) toward a 750 ppm leak of H2 gas at high temperature (500°C) compared with the rod-like and nest-like morphologies. Furthermore, the hexagonal plate-like morphology showed fast response and recovery times of 40 and 82 s, respectively. The surface facet of the hexagonal morphology of AlN might be energetically favorable for gas adsorption-desorption for enhanced hydrogen detection.
KW - aluminum nitride
KW - controllable morphology
KW - direct nitridation
KW - hydrogen sensor
KW - γ-AlOOH
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U2 - 10.1007/s12613-020-2143-8
DO - 10.1007/s12613-020-2143-8
M3 - Article
AN - SCOPUS:85092937549
SN - 1674-4799
VL - 27
SP - 1560
EP - 1567
JO - International Journal of Minerals, Metallurgy and Materials
JF - International Journal of Minerals, Metallurgy and Materials
IS - 11
ER -
