암모니아 표면처리 된 질소 도핑 TiO2 광촉매의 합성 및 광분해반응

김예솔; 배병철; 이영석; Yesol Kim; Byong Chol Bai; Young-Seak Lee

Applied Chemistry for Engineering, Vol.23, No.3, 308-312, June, 2012

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암모니아 표면처리 된 질소 도핑 TiO2 광촉매의 합성 및 광분해반응

Synthesis and Photodecomposition of N-Doped TiO2 Surface Treated by Ammonia

김예솔, 배병철, 이영석 ^†

충남대학교 공과대학 정밀응용화학과

Yesol Kim, Byong Chol Bai, and Young-Seak Lee^†

Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University, Daejeon 303-764, Korea

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초록

암모니아를 이용하여 질소가 도핑된 광촉매를 제조하고 이에 따른 가시광 광촉매 활성효과를 알아보았다. 질소 도핑된 TiO2 광촉매가 태양광영역에서 분해되는 정도를 확인하기 위해서 태양광에 조사하에 메틸렌블루 염료분해 실험을 수행하였다. SEM 이미지 분석결과 질소가 도핑된 TiO2 광촉매의 응집 입자가 감소함을 알 수 있었고, XRD 결과 600℃에서 열처리된 질소 도핑 TiO2 광촉매는 아나타제 구조와 루타일이 존재하고 있음을 알 수 있었다. 또한, X선 광전자 분광기 분석을 통하여 암모니아 반응시간에 따라서 TiO2 광촉매에 N의 조성 증가를 알 수 있었다. TiO2 광촉매의 질소 도핑에 의하여 메틸렌블루에 대한 광분해 효과가 도핑되지 않은 시료에 비해 증가하였다. 또한 질소 도핑은 TiO2 광촉매의 결정에도 영향을 주었다.

Nitrogen doped TiO2 photocatalysts were prepared by ammonia for exploring the visible light photocatalytic activity. To explore the visible light photocatalytic activity of the nitrogen doped TiO2 photocatalyst, the removal of methylene blue dye was investigated under the sunlight. SEM images showed that the flocculated particle sizes of N-doped TiO2 decreased due to the reaction with ammonia. XRD patterns demonstrated that the samples calcined at temperatures up to 600 ℃ and doped with nitrogen using ammonia clearly showed rutile as well as anatase peaks. The XPS results showed that the nitrogen composition onto TiO2 increased according to the reaction time with ammonia. Photocatalytic activity of the nitrogen doped TiO2 was better than that of undoped TiO2. Nitrogen doping onto the TiO2 also affected the crystal type of TiO2 photocatalyst.

Keywords:titania;N-doping;photocatalysts;solar light;ammonia

[References]

Jung JT, Kim JO, Choi WY, Lee JW, K. Geo-Environ.Con., 287 (2008)
Jung WY, Lee SH, Hong SS, J. Environ. Sci., 20, 511 (2011)
Park SW, Nam SK, Heo JE, J. Environ. Sci., 16, 683 (2007)
Mitoraj D, Kisch H, Angew. Chem. Int. Ed., 47, 9975 (2008)
Lee MH, Kim MS, Jurng JS, Chin SM, Park ES, Lee GW, J. Environ. Sci., 19, 577 (2010)
Choi SO, Cho JH, Lim SH, Chung EY, Kor. J. Met.Mater., 49, 367 (2011)
Baek MH, Choi SA, Kim DS, J. K. Soc. W. Q., 26, 707 (2010)
Wang Y, Feng CX, Jin ZS, Zhang JW, Yang HJ, Zhang SL, J. Mol. Catal. A-Chem., 260(1-2), 1 (2006)
Bai BC, Im JS, Kim JG, Lee YS, Appl. Chem. Eng., 21(1), 29 (2010)
Yang J, Bai HZ, Tan XC, Lian JS, Appl. Surf. Sci., 253(4), 1988 (2006)
Khan SUM, Al-Shahry M, Ingler WB, Science., 297, 2243 (2002)
Yun TK, Bae JY, J. Kor. Soc. Environ. Eng., 31, 1019 (2009)
Yun SM, Kim J, Jeong E, Im JS, Lee YS, Appl. Chem. Eng., 22(1), 21 (2011)
Lim S, Nguyen-Phan TD, Shin EW, Appl. Chem. Eng., 22(1), 61 (2011)
Hu L, Yoko T, Kozuka H, Sakka S, T. S. Film., 219, 18 (1992)
Bakardjieva S, Subrt J, Stengl V, Dianez MJ, Sayagues MJ, Appl. Catal. B: Environ., 58(3-4), 193 (2005)
Liao Y, Que W, Tang Z, Wang W, Zhao W, J. Alloy.Compd., 509, 1054 (2011)
Liu X, Liu Z, Zheng J, Yan X, Li DD, Chen S, Chu W, J. Alloy. Compd., 509, 9970 (2011)
Chen XB, Burda C, J. Phys. Chem. B, 108(40), 15446 (2004)
Chen C, Bai H, Chang S, Chang C, Den W, J. Nanopart.Res., 9, 365 (2006)
Cheng X, Yua X, Xing Z, Wan J, Ener. Pro., 16, 598 (2012)
Livraghi S, Paganini MC, Giamello E, Selloni A, Di Valentin C, Pacchioni G, J. Am. Chem. Soc., 128(49), 15666 (2006)
Kim SM, Yun TK, Hing DI, J. K. Chem. Soc., 49, 567 (2005)

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[3] Park SW, Nam SK, Heo JE, J. Environ. Sci., 16, 683 (2007)

[4] Mitoraj D, Kisch H, Angew. Chem. Int. Ed., 47, 9975 (2008)

[5] Lee MH, Kim MS, Jurng JS, Chin SM, Park ES, Lee GW, J. Environ. Sci., 19, 577 (2010)

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[9] Bai BC, Im JS, Kim JG, Lee YS, Appl. Chem. Eng., 21(1), 29 (2010)

[10] Yang J, Bai HZ, Tan XC, Lian JS, Appl. Surf. Sci., 253(4), 1988 (2006)

[11] Khan SUM, Al-Shahry M, Ingler WB, Science., 297, 2243 (2002)

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[13] Yun SM, Kim J, Jeong E, Im JS, Lee YS, Appl. Chem. Eng., 22(1), 21 (2011)

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[20] Chen C, Bai H, Chang S, Chang C, Den W, J. Nanopart.Res., 9, 365 (2006)

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[22] Livraghi S, Paganini MC, Giamello E, Selloni A, Di Valentin C, Pacchioni G, J. Am. Chem. Soc., 128(49), 15666 (2006)

[23] Kim SM, Yun TK, Hing DI, J. K. Chem. Soc., 49, 567 (2005)