TiO2 피복 석탄회의 광촉매 특성에 미치는 WO3의 첨가 효과

유연태; 김병규; Yeon-tae Yu; Byoung-gyu Kim

Korean Journal of Materials Research, Vol.13, No.10, 691-696, October, 2003

DOI10.3740/MRSK.2003.13.10.691 Export Citation

TiO2 피복 석탄회의 광촉매 특성에 미치는 WO3의 첨가 효과

Effect of Adding WO3 on Photocatalytic Property of TiO2 Coated Coal Fly Ash

유연태^†, 김병규

한국지질자원연구원 자원활용소재연구부

Yeon-tae Yu^†, and Byoung-gyu Kim

Mineral & Materials Processing Division, Korea Institute of Geoscience and Mineral Resources, Korea

E-mail:

To improve the photocatalyticactivity of -coated coal fly ash, tungsten hydroxide was doped by impregnation method and was oxidized by heat treatment in temperature ranges of for 2 hrs. The changes of crystal structure and crystal size of and on coal fly ash were investigated by X-ray diffraction analysis. The crystal structure of titanium dioxide showed only anatase type and - compounds appeared in the heat treatment temperature ranges of . By adding in coated on fly ash, the growth of crystal size of anatase was restrained and the anatase phase was stabilized in temperature ranges of TEX>$500∼<800^{\circ}C$. And acted as a trap site of electrons excited from anatase by irradiating UV. The maximum removal efficiency of NO gas for /-coated coal fly ash was 84% and appeared when the ammonium tungstate of $1.310^{-3}$ M was doped and then heated at for 2 hrs.

Keywords:photocatalyst;titanium oxide;tungsten oxide;coal fly ash

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[4] Beydoun D, Amal R, Low GKC, McEvoy S, J. Phys. Chem. B, 104(18), 4387 (2000)

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[7] Hsien YH, Chang CF, Chen YH, Cheng SF, Appl. Catal. B: Environ., 31(4), 241 (2001)

[8] Yamashita H, Honda M, Ichihashi Y, Anpo M, Hirao T, Itoh N, J. Phys. Chem. B, 102(52), 10707 (2000)

[9] Yu YT, Choi YY, Kim BG, Lee HJ, Lee BT, Korea Journal of Materials Research, 11(8), 690 (2001)

[10] Yu YT, Choi YY, Kim BG, Korea Journal of Materials Research, 12(5), 334 (2002)

[11] Fu XZ, Louis AC, Yang Q, Anderson MA, Environ. Sci. Technol., 30, 647 (1996)

[12] Vinodgopal K, Kamat PV, Environ. Sci. Technol., 29, 841 (1995)

[13] Engweiler J, Harf J, Baiker A, J. Catal., 159(2), 259 (1996)

[14] Ramis G, Busca G, Cristiani C, Lietti L, Bregani F, Langmuir, 8, 1744 (1992)

[15] Martin ST, Morrison CL, Hoffmann MR, J. Phys. Chem., 98(51), 13695 (1994)

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[20] Bregani F, Casale C, Depero LE, Natali-Sora I, Robba D, Sangletti L, Toledo GT, Sens. Actuators B, 31, 25 (1996)

[21] Do YR, Lee W, Dwight K, Wold A, J. Solid State Chem., 108, 198 (1994)

[22] Tennakone K, Ileperuma OA, Bandare JM, Kiridena WCB, Semicond. Sci. Technol, 7, 423 (1992)