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Received March 9, 2006
Accepted June 5, 2006
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A simple technique to determine quantum yield for UV photocatalytic decomposition studies
Synfuel Research Center, Energy Conversion Research Department, Korea Institute of Energy Research, 71-2 Jang-dong, Yusong-gu, Daejeon 305-343, Korea
hkjoo@kier.re.kr
Korean Journal of Chemical Engineering, November 2006, 23(6), 931-934(4), 10.1007/s11814-006-0010-6
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Abstract
In this article a simple but effective method to calculate the quantum yield in heterogeneous photocatalysis is addressed. The amount of photons absorbed by coated photocatalyst was obtained with a portable radiometer, optical fiber (diameter 1 mm) and a purpose-built, fabricated accessory, as well as converted isopropyl alcohol, as the probe substance, with gas chromatography and a designed reactor system which determined a first order rate constant. Quantum yield was calculated under the assumptions that all the irradiated photons from one end of the fiber were either absorbed by the photocatalyst or transmitted to the other end and that the peak wavelength of the spectrum of the used UVBLB lamp represented the irradiated light. The resulting quantum yields with four different photocatalysts were in the range of 10-30% under specified reaction conditions of initial isopropyl alcohol concentration of 240 volume ppm, coated length of 10 cm, and initial transmitted light intensity of 20-25 μW/cm2.
References
Fujishima A, Rao TN, Tryk DJ, Photochem. and Photobiol C: Photochem. Reviews, 1, 1 (2000)
Kim JS, Lee TK, Korean J. Chem. Eng., 18(6), 935 (2001)
Na Y, Song S, Park Y, Korean J. Chem. Eng., 22(2), 196 (2005)
Serpone N, Salinaro A, Pure Appl. Chem., 71, 303 (1999)
Takeuchi K, “Test method for air purification performance of photocatalytic materials Part 1: Removal of nitric oxide,” Working Draft for ISO/TC 206 WG33 (2004)
Zhang ZB, Wang CC, Zakaria R, Ying JY, J. Phys. Chem. B, 102(52), 10871 (1998)
Kim JS, Lee TK, Korean J. Chem. Eng., 18(6), 935 (2001)
Na Y, Song S, Park Y, Korean J. Chem. Eng., 22(2), 196 (2005)
Serpone N, Salinaro A, Pure Appl. Chem., 71, 303 (1999)
Takeuchi K, “Test method for air purification performance of photocatalytic materials Part 1: Removal of nitric oxide,” Working Draft for ISO/TC 206 WG33 (2004)
Zhang ZB, Wang CC, Zakaria R, Ying JY, J. Phys. Chem. B, 102(52), 10871 (1998)
