자성광촉매용 TiO 2 -Fe 2 O 3 나노복합분말의 합성

이창우; 김순길; 윤성희; 이재성; 좌용호; Chang-Woo Lee; Soon-Gil Kim; Sung-Hee Yun; Jai-Sung Lee; Yong-Ho Choa

Korean Journal of Materials Research, Vol.15, No.8, 508-513, August, 2005

DOI10.3740/MRSK.2005.15.8.508 Export Citation

자성광촉매용 TiO 2 -Fe 2 O 3 나노복합분말의 합성

Synthesis of TiO 2 -Fe 2 O 3 Nanocomposite Powders for Magnetic Photocatalyst

이창우, 김순길, 윤성희, 이재성^†, 좌용호 ¹

한양대학교 공학대학 금속재료공학과
¹한양대학교 공과대학 화학공학과

Chang-Woo Lee, Soon-Gil Kim, Sung-Hee Yun, Jai-Sung Lee^†, and Yong-Ho Choa¹

Department of Metallurgy and Materials Science, Hanyang University, Ansan, 426-791, Korea
¹Department of Chemical Engineering, Hanyang University, Ansan, 426-791, South Korea

E-mail:

[ TiO 2 ?Fe 2 O 3 ] nanocomposite powders for magnetic photocatalyst were synthesized by sol-gel process, in which TiO 2 photocatalytic layer was formed on the surface of γ?Fe 2 O 3 magnetic core. Transmission electron microscopy (TEM) observation and X-ray diffractometry (XRD) analysis revealed that γ?Fe 2 O 3 nanoparticles, 10\~20nm in diameter, were coated by TiO 2 shell of 5nm in thickness and TiO 2 was anatase phase. Also hydroxyl group (-OH) used to decompose organic compounds was detected by Fourier transformation infrared spectrometry(FT-IR) analysis. UV-Visible spectrophotometry results showed that light absorption occurred in the wavelength range of 400\~700nm , and the band gap energy (E g ) of powder was 1.8 eV. Finally it was found that the coercivity (H(ci) and saturation magnetization (M s ) of the powder were 79 Oe and 14.8 emu/g, respectively as experimental vibrating sample magnetometer (VSM) measurements.

Keywords:magnetic photocatalyst;nanopowders;sol-gel process;band gap energy

[References]

Hoffmann MR, Martin ST, Bahnemann DW, Chem. Rev., 95(3), 735 (1995)
Yoo SH, Technology and Patent Trend in Photocatalysts, KISTI Report, BW110 (1999) (1999)
Baydoun D, Amal R, Low G, McEvoy S, in Proceedings of the The Third World Congress on Particle Technology (Brightion, UK 6-9 July 1998) p. 201 (1998)
Baydoun D, Amal R, Low G, McEvoy S, J. Phys. Chem. B, 104(8), 4387 (2000)
Beydoun D, Amal R, Low G, McEvoy S, J. Mol. Catal. A-Chem., 180(1-2), 193 (2002)
Watson S, Baydoun D, Amal R, J. Photochem. Photobiol. A: Chem., 148(1-3), 303 (2002)
Baydoun D, Amal R, Mater. Sci. Eng. B, 94(1), 71 (2002)
Cornell RM, Schwertmann U, The Iron Oxides: Structure, Proprties, Reactions, Occurrence and Uses, VCH Publishers, New York, NY (1996) (1996)
Seino S, Kinoshita T, Otome Y, Nakagawa T, Okitsu K, Mizukoshi Y, Nakayama T, Sekino T, Niihara K, Yamamoto TA, J. Mago. Magn. Mater., 293(1), 144 (2005)
Gao Y, Chen BH, Li HL, Ma YX, Mater. Chem. Phys., 80(1), 348 (2003)
Zhao XK, Fendler JH, J. Phys. Chem., 95, 3716 (1991)
Lucy IB, Beydoun J, Waters DN, J. Mater. Sci. Lett., 14, 515 (1995)
Meng LJ, Dos Santos MP, Thin Solid Films, 226, 22 (1993)
Aarik J, Aidla A, Kiisler AA, Uustare T, Sammelselg V, Thin Solid Films, 305(1-2), 270 (1997)
Cullity BD, Stock SR, Elements of X-ray Diffraction (3rd Ed.), Prentice Hall, New Jersey (2001) (2001)
Lindler M, Theurich J, Bahnemann DW, Water Sci. Technol., 35(4), 79 (1997)
Chen D, Ray AK, Water Res., 32(11), 3223 (1998)
Porter JF, Li YG, Chan CK, J. Mater. Sci., 34(7), 1523 (1999)
Tang H, Prasad K, Sanjunes R, Schmid PE, Levy F, J. Appl. Phys., 75(4), 2042 (1994)
Daude N, Gout C, Jouanin C, Phys. Rev. B, 15, 3229 (1977)
Litter MI, Navio JA, J. Photochem. Photobiol. A, 84, 183 (1994)
Pulgarin C, Kiwi J, Langmuir, 11(2), 519 (1995)
Bedja I, Kamat PV, J. Phys. Chem., 99(22), 9182 (1995)
Henglein A, Berichte der Bunsen-Gesellschaft-Phys. Chem., 101, 1562 (1997)
Evans JE, Springer KW, Zhang JZ, J. Chem. Phys., 101(7), 6222 (1994)
Byrne JA, Eggins BR, Brown NMD, McKinney B, Rouse M, Appl. Catal. B: Environ., 17(1-2), 25 (1998)
Xingzhao D, Xianghuai L, Mater. Sci. Eng. A, 224(1-2), 210 (1997)
Hoffmann MT, Martin ST, Bahnemann DW, Chem. Rev., 95(3), 735 (1995)
Connor PA, Dobson KD, McQuillan AJ, Langmuir, 15(7), 2402 (1999)

[Related Articles]

[1] Hoffmann MR, Martin ST, Bahnemann DW, Chem. Rev., 95(3), 735 (1995)

[2] Yoo SH, Technology and Patent Trend in Photocatalysts, KISTI Report, BW110 (1999) (1999)

[3] Baydoun D, Amal R, Low G, McEvoy S, in Proceedings of the The Third World Congress on Particle Technology (Brightion, UK 6-9 July 1998) p. 201 (1998)

[4] Baydoun D, Amal R, Low G, McEvoy S, J. Phys. Chem. B, 104(8), 4387 (2000)

[5] Beydoun D, Amal R, Low G, McEvoy S, J. Mol. Catal. A-Chem., 180(1-2), 193 (2002)

[6] Watson S, Baydoun D, Amal R, J. Photochem. Photobiol. A: Chem., 148(1-3), 303 (2002)

[7] Baydoun D, Amal R, Mater. Sci. Eng. B, 94(1), 71 (2002)

[8] Cornell RM, Schwertmann U, The Iron Oxides: Structure, Proprties, Reactions, Occurrence and Uses, VCH Publishers, New York, NY (1996) (1996)

[9] Seino S, Kinoshita T, Otome Y, Nakagawa T, Okitsu K, Mizukoshi Y, Nakayama T, Sekino T, Niihara K, Yamamoto TA, J. Mago. Magn. Mater., 293(1), 144 (2005)

[10] Gao Y, Chen BH, Li HL, Ma YX, Mater. Chem. Phys., 80(1), 348 (2003)

[11] Zhao XK, Fendler JH, J. Phys. Chem., 95, 3716 (1991)

[12] Lucy IB, Beydoun J, Waters DN, J. Mater. Sci. Lett., 14, 515 (1995)

[13] Meng LJ, Dos Santos MP, Thin Solid Films, 226, 22 (1993)

[14] Aarik J, Aidla A, Kiisler AA, Uustare T, Sammelselg V, Thin Solid Films, 305(1-2), 270 (1997)

[15] Cullity BD, Stock SR, Elements of X-ray Diffraction (3rd Ed.), Prentice Hall, New Jersey (2001) (2001)

[16] Lindler M, Theurich J, Bahnemann DW, Water Sci. Technol., 35(4), 79 (1997)

[17] Chen D, Ray AK, Water Res., 32(11), 3223 (1998)

[18] Porter JF, Li YG, Chan CK, J. Mater. Sci., 34(7), 1523 (1999)

[19] Tang H, Prasad K, Sanjunes R, Schmid PE, Levy F, J. Appl. Phys., 75(4), 2042 (1994)

[20] Daude N, Gout C, Jouanin C, Phys. Rev. B, 15, 3229 (1977)

[21] Litter MI, Navio JA, J. Photochem. Photobiol. A, 84, 183 (1994)

[22] Pulgarin C, Kiwi J, Langmuir, 11(2), 519 (1995)

[23] Bedja I, Kamat PV, J. Phys. Chem., 99(22), 9182 (1995)

[24] Henglein A, Berichte der Bunsen-Gesellschaft-Phys. Chem., 101, 1562 (1997)

[25] Evans JE, Springer KW, Zhang JZ, J. Chem. Phys., 101(7), 6222 (1994)

[26] Byrne JA, Eggins BR, Brown NMD, McKinney B, Rouse M, Appl. Catal. B: Environ., 17(1-2), 25 (1998)

[27] Xingzhao D, Xianghuai L, Mater. Sci. Eng. A, 224(1-2), 210 (1997)

[28] Hoffmann MT, Martin ST, Bahnemann DW, Chem. Rev., 95(3), 735 (1995)

[29] Connor PA, Dobson KD, McQuillan AJ, Langmuir, 15(7), 2402 (1999)