마이크로에멀젼에서 제조된 나노크기의 이산화티탄에 의한 p-니트로페놀의 광분해 반응

이만식; 이근대; 주창식; 임권택; 홍성수; Man Sik Lee; Gun Dae Lee; Chang Sik Ju; Kwon Taek Lim; Seong Soo Hong

Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.3, 216-223, May, 2002

Export Citation

마이크로에멀젼에서 제조된 나노크기의 이산화티탄에 의한 p-니트로페놀의 광분해 반응

A Photocatalytic Degradation of p-Nitrophenol over Nanosized Titanium Dioxide Prepared in Microemulsion

이만식, 이근대 , 주창식 , 임권택 ¹, 홍성수 ^†

부경대학교 화학공학부, 부산 608-739
¹부경대학교 화상정보공학부, 부산 608-739

Man Sik Lee, Gun Dae Lee , Chang Sik Ju , Kwon Taek Lim¹, and Seong Soo Hong^†

Division of Chemical Engineering, Pukyong Naitonal University, Pusan 608-739, Korea
¹Image and Information Engineering, Pukyong Naitonal University, Pusan 608-739, Korea

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초록

음이온의 AOT (sodium bis(2-ethylhexyl) sulfosuccinate) 계면활성제를 사용하여 나노크기의 TiO2를 제조하였으며, TEM, XRD, BET, UV-DRS, TGA-DTA 등을 사용하여 마이크로에멀젼을 이용한 나노입자 제조시 W0 (H2O/AOT)비, R (H2O/TTIP)비에 따른 입자의 크기 및 결정성 등 물리적 성질을 조사하였다. 또한 제조된 TiO2 나노입자의 광촉매적 특성을 알아보기 위해 회분식 반응장치를 이용하여 p-니트로페놀의 광분해반응의 활성을 조사하였다. 제조된 TiO2 나노입자는 소성온도 300~600 ℃의 범위에서 anatase 구조가 형성되었으며, 소성온도 700 ℃에서 anatase 구조에서 rutile 구조로 전이되기 시작하였다. 입자크기는 Wo 비 및 R 비가 증가함에 따라 증가하였으나, Wo 비가 더 큰 영향을 나타내었다. 한편 p-니트로페놀의 광분해반응에서 반응성은 표면적과 결정크기보다는 입자 결정성의 영향을 많이 받았다. 또한 500 ℃에서 소성된 TiO2 촉매가 순수한 anatase 구조를 가지며 가장 높은 p-니트로페놀 분해활성을 보여주었다.

Nanosized titania sol has been produced by the controllled hydrolysis of titanium tetraisopropoxide(TTIP) in sodium bis(2-ethylhexyl) sulfosuccinate(AOT) reverse micelles. The physical properties, such as crystallite size and crystallinity according to R and Wo ratios have been investigated by TEM, XRD, BET, UV-DRS, TGA and DTA. In addition, the photocatalytic degradation of p-nitrophenol has been studied in a batch reactor in the presence of UV light to compare the photocatalytic activity of prepared nanosized titania. It has shown that the anatase structure appeared in the 300~600 ℃ calcination temperature range, and the conversion of anatase into rutile started above 700 ℃. The crystallite size increased with increased R and Wo ratios, but Wo ratio showed a stronger effect on the crystallite size than R ratio. In the photocatalytic degradation of p-nitrophenol, the photocatalytic activity was mainly determined by the crystallinity of titania. In addition, the titania calcined at 500 ℃ resulted in the pure anatase structure that had the highest activity of the photocatalytic degradation of p-nitrophenol.

Keywords:nanosized titania;AOT;reverse micelle;photocatalytic degradation of p-nitrophenol

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Alivisatos AP, MRS Bull., Aug., 23 (1995)
Chang WI, Kang SW, Lee KR, J. Korean Ceram. Soc., 35, 594 (1998)
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Hong SS, Lee MS, Kim JH, Ahn BH, Lim KT, Lee GD, J. Ind. Eng. Chem., 8(2), 150 (2002)

[Referenced By]

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[1] Suryanyana C, Froes FH, Metall. Trans., 23A, 1071 (1992)

[2] Alivisatos AP, MRS Bull., Aug., 23 (1995)

[3] Chang WI, Kang SW, Lee KR, J. Korean Ceram. Soc., 35, 594 (1998)

[4] Arriagada FJ, Osseo-Asare K, Colloids Surf., 69, 105 (1992)

[5] Beck C, Hartl W, Hempelmann R, J. Mater. Res., 13, 3174 (1998)

[6] Herrig H, Hempelmann R, Mater. Lett., 27, 287 (1996)

[7] Palmisano L, Augugliaro V, Schiavello M, Sclafani A, J. Mol. Catal., 56, 284 (1989)

[8] Moran PD, Bartlett JR, Bowmaker GA, Woolfrey JL, Cooney RP, J. Sol-Gel Sci. Technol., 15, 251 (1999)

[9] Cullity BD, Elements of X-Ray Diffraction. Adison-Wesley, Reading, MA (1978)

[10] Reddy KM, Reddy CVG, Manorama SV, J. Solid State Chem., 158, 180 (2001)

[11] Hirai T, Sato H, Komasawa I, Ind. Eng. Chem. Res., 32, 3014 (1993)

[12] Fendler JH, Chem. Rev., 87, 877 (1987)

[13] Wolf K, Yazdani A, Yates P, J. Air Waste Manage. Assoc., 41, 1055 (1991)

[14] Turchi CS, Ollis DF, J. Catal., 122, 178 (1990)

[15] Hong SS, Lee MS, Kim JH, Ahn BH, Lim KT, Lee GD, J. Ind. Eng. Chem., 8(2), 150 (2002)