침상구조의 루틸상 TiO 2 초미분체를 이용한 광촉매 반응에 대한 연구

황두선; 구숙경; 김광수; 민형섭; 이은구; 김선재; Doo-sun Hwang; Suk-kyeong Ku; Kwang Su Kim; Hyung Seob Min; Eun Gu Lee; Sun-Jae Kim

Korean Journal of Materials Research, Vol.12, No.8, 641-649, August, 2002

DOI10.3740/MRSK.2002.12.8.641 Export Citation

침상구조의 루틸상 TiO 2 초미분체를 이용한 광촉매 반응에 대한 연구

Study on Photocatalytic Reaction Using Acicular TiO 2 Rutile Powder

황두선, 구숙경, 김광수¹, 민형섭, 이은구¹, 김선재^†

세종대학교 나노기술연구소/나노공학과
¹조선대학교 재료공학과

Doo-sun Hwang, Suk-kyeong Ku, Kwang Su Kim¹, Hyung Seob Min, Eun Gu Lee¹, and Sun-Jae Kim^†

Sejong Advanced Institute of Nano Technology/Dept. of Nano Science and Technology, Sejong University, Seoul 143-747, Korea
¹Department of Materials Science and Engineering, Chosun University, Gwangju 501-759, Korea

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The redox properties of a homogeneously-precipitated TiO 2 rutile powder with a BET surface area of ~ 200m 2 /g, consisting of an acicular primary particle, were characterized using photocatalytic reaction in aqueous 4-chlorophenol, Cu-EDTA and Pb-EDTA solutions under ultraviolet irradiation, compared to those of commercial P-25 X 200m 2 powder with a spherical primary particle as well as home-made anatase TiO 2 powder with ~ 200m 2 /g BET surface area. Here, the anatase powder also includes mainly the primary particles very similar to the acicular shapes of the rutile TiO 2 powder. The rutile powder showed the fastest decomposition rate and the largest amount in the photoredor, compared with the anatase or P-25 powder, while the anatase powder unexpectedly showed the slowest rate and the smallest amount in the same experiments regardless of almost the same surface area. From results, the excellent photoredox abilities of this rutile powder appears to be due to specific powder preparation method, like a homogeneous precipitation leading to direct crystallization from the solution, regardless of their crystalline structures even when having the similar particle shape and surface area.

Keywords:ultrafine TiO 2 powder;rutile phase;Photocatalytic reaction;4- Chlorophenol;Cu- EthyleneDiamine-Tetraacetic Acid (EDTA);Pb-EDTA

[References]

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[1] Chen DW, Ray AK, Appl. Catal. B: Environ., 23(2-3), 143 (1999)

[2] Mills A, Sawunyma P, J. Photochem. Photobiol. A, 84, 305 (1994)

[3] Ilisz I, Laszlo Z, Dombi A, Appl. Catal. A: Gen., 180(1-2), 25 (1999)

[4] Li X, Jerry, Cubbage W, Jenks WS, J. Org. Chem., 64, 8509 (1999)

[5] Li X, Cubbage JW, Jenks WS, J. Org. Chem., 64, 8525 (1999)

[6] Somorjai GA, Chemistry in two dimensions: Surface (Cornel University Press, Ithaca, U.S.A., 1981). p551 (1981)

[7] Kim SJ, Park SD, Rhee CK, Kim WW, Park S, Scri. Mat., 44, 1299 (2001)

[8] Kim SJ, Park SD, Jeon CJ, Cho YH, Rhee CK, Kim WW, Lee EG, J. Sol-Gel Sci. Tech., 22(1-2), 63 (2001)

[9] Kim SJ, Park SD, Jeong YH, Park S, J. Am. Ceram. Soc., 82(4), 927 (1999)

[10] Kim SJ, Park SD, Kim KH, Jeong YH, Kuk IH, United States Patent No.6001326 (1999) (1999)

[11] Park SD, Cho YH, Kim WW, Kim SJ, J. Solid State Chem., 146, 230 (1999)

[12] Seo DS, Lee JK, Kim H, J. Kor. Ceram. Soc., 37(7), 700 (2000)

[13] Sugimoto T, Sakata K, Muramatsu A, J. Colloid Interface Sci., 159, 372 (1993)

[14] Gopal M, Chan WJ, Dejonghe LC, J. Mater. Sci., 32(22), 6001 (1997)

[15] Ayres JA, Decontamination of Nuclear Reactors and Equipment, (Ronald Press : New York, 1970), p.6 (1970)

[16] Loy L, Wolf EE, Solar Energy, 34(6), 455 (1985)

[17] Hoffmann MZ, Prasad DR, Jones G II, Malba V, J. Am. Chem. Soc., 105, 6360 (1983)