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Gas sensors based on semiconducting metal oxides have attracted considerable attention for various applications owing to their facile, cheap, and small-scale manufacturing processes. Hematite (α-Fe2O3) is widely considered as a promising candidate for a gas-sensing material owing to not only its abundance in the earth’s crust and low price but also its chemical stability and suitable bandgap energy. However, only a few studies have been performed in this direction because of the low gas response and sluggish response of hematitebased gas sensors. Nanostructures present a representative solution to both overcome these disadvantages and exploit the desirable features to produce high-performance gas sensors. However, several challenges remain for adopting gas sensors based on metal oxide nanostructures, such as improving cost efficiency and facilitating mass production. This review summarizes the recent studies on gas sensors based on hematite nanostructures. It also provides useful insights into various strategies for enhancing the gas-sensing properties of gas sensors based on hematite nanostructures.
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참고문헌 (16)
참고문헌 신청
I. S. Hwang / 2009 / A facile fabrication of semiconductor nanowires gas sensor using PDMS patterning and solution deposition / Sens. Actuator B-Chem. 136(1):224~229
L. Liao / 2008 / Morphology controllable synthesis of α-Fe2O3 1D nanostructures : Growth mechanism and nanodevice based on single nanowire / J. Phys. Chem. C 112(29):10784~10788
Z. Wu / 2008 / Hematite hollow spheres with a mesoporous shell : Controlled synthesis and applications in gas sensor and lithium ion batteries / J. Phys. Chem. C 112(30):11307~11313
X. Pan / 2013 / Self-gating effect induced large performance improvement of ZnO nanocomb gas sensors / ACS Nano 7(10):9318~9324
S. Shao / 2011 / Low temperature crystallization of transparent, highly ordered nanoporous SnO2 thin films : Application to room-temperature hydrogen sensing / Nanoscale 3(10):4283~4289
L. Liao / 2008 / Morphology controllable synthesis of α-Fe2O3 1D nanostructures : Growth mechanism and nanodevice based on single nanowire / J. Phys. Chem. C 112(29):10784~10788
Z. Wu / 2008 / Hematite hollow spheres with a mesoporous shell : Controlled synthesis and applications in gas sensor and lithium ion batteries / J. Phys. Chem. C 112(30):11307~11313
X. Pan / 2013 / Self-gating effect induced large performance improvement of ZnO nanocomb gas sensors / ACS Nano 7(10):9318~9324
S. Shao / 2011 / Low temperature crystallization of transparent, highly ordered nanoporous SnO2 thin films : Application to room-temperature hydrogen sensing / Nanoscale 3(10):4283~4289
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