探討氧化銅添加於氧化鐵奈米纖維之氣體感測器與光觸媒性質

吳壬安

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探討氧化銅添加於氧化鐵奈米纖維之氣體感測器與光觸媒性質

Effect of CuO on gas sensing and photocatalysis of α-Fe2O3 nanofibers

吳壬安 , Masters　　Advisor：曾文甲　　

繁體中文

氧化鐵；氧化銅；靜電紡絲；氣體感測器；光觸媒； α-Fe2O3 ； CuO ； electrospinning ； gas sensor ； photocatalyst

Abstract │ Reference (65) │ Altmetrics

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α-Fe2O3 and CuO/α-Fe2O3 nanofibers were synthesized by electrospinning and were characterized by SEM, XRD, TGA, TEM and ICP when molar ratio of Fe and Cu in CuO/α-Fe2O3 was varied. In the electrospinning process, PVP was used as the template for shaping the nanofibers. After electrospinning, PVP was removed thermally at 550oC in air atmosphere, resulted in the α-Fe2O3 and CuO/α-Fe2O3 nanofibers. Microstructure characteristics, together with the gas sensing and photocatalysis properties were examined.
The measurement of the gas sensing properties was at 300oC to detect different concentrations of NO2, and examined the difference between α-Fe2O3 and CuO/α-Fe2O3. From the result, α-Fe2O3 and molar ratio 8:1 were p-type gas sensor, while molar ratios of 4:1, 2:1 and 1:1 were n-type gas sensor. CuO/α-Fe2O3 of molar ratio 4:1 exhibited the highest sensitivity. Changing heat treatment temperature of the molar ratio 1:1 CuO/α-Fe2O3 nanofibers, we obtained the highest sensitivity at 600oC. 
The photodegradation of dye (MB, methylene blue) with initial concentration 5x10-6 M was conducted by UV light for 2 hours. For the α-Fe2O3 and different molar ratios of CuO/α-Fe2O3, the highest photodegradation was from the ratio 4:1. The CuO/α-Fe2O3 with molar ratio of 1:1, the highest photodegradation occurred at 550oC.

Reference ( 65 ) 〈TOP〉

[1] H. Takeda, T. Ueda, K. Kamada, K. Matsuo, T. Hyodo, Y. Shimizu. “CO-Sensing Properties of a NASICON-Based Gas Sensor Attached with Pt Mixed With Bi2O3 as a Sensing Electrode,” Electrochimica Acta, 155, (2015) 8-15.
連結：
[2] D. Zhang, Z. Liu, C. Li, T. Tang. X. Liu, S. Han, B. Lei, C. Zhou. “Detection of NO2 down to ppb Levels Using Individual and Multiple In2O3 Nanowire Devices, ” Nano Letters, 4 (10), (2004) 1919-1924.
連結：
[3] Z. GuO, G. Chen, G. Zeng, L. Liu, C. Zhang. “Metal Oxides and Metal Salt Nanostructures for Hydrogen Sulfide Sensing: Mechanism and Sensing Performance,” Rsc Advances, 5 (67), (2015) 54793-54805.
連結：
[4] 周瑞福, 氣體感測器原理與應用, “http://www.sanlien.com”.
連結：
[5] T. Seiyama, A. Kato, K. Fujishi, M. Nagatani. “A New Detector for Gaseous Components Using Semiconductive Thin Films,” Analytical Chemistry, 34 (11), (1962) 1502–1503.
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