황산으로 개질된 TiO<sub>2</sub> 촉매의 특성

배영일; 박만영; 이준희; 손종락

Journal of the Korean Industrial and Engineering Chemistry, Vol.3, No.1, 46-52, March, 1992

Export Citation

황산으로 개질된 TiO₂ 촉매의 특성

Characterization of TiO₂ Catalyst Modified with H₂SO₄

배영일, 박만영, 이준희, 손종락

초록

TiCl₄-HCl 혼합용액으로부터 침전법으로 TiO₂를 만들고 이를 황산으로 개질하여 TiO₂/SO₄^2- 촉매를 제조하였으며 제조된 촉매의 특성을 IR, XPS, XRD 및 DT-TGA로 조사하였다. 개질된 촉매의 산의 세기는 적어도 H₀≤-14.52로 초강산 성질을 나타내었으며 이 성질은 TiO ₂와 황산이온에 의하여 형성된 착물의 S=O 결합성질에 기인하였다. TiO₂/SO₄^2-의 IR spectra를 조사한 결과 황산이온은 TiO₂ 표면에 2자리 ligand로 배위하였다. Ti0₂/SO₄^2-는 황산으로 개질하지 아니한 순수한 TiO₂에 비하여 표면적이 상당히 컸으며 또한 무정형에서 anatase상으로 되는 전이온도도 높았다.

TiO₂/SO₄^2- was prepared by precipitation from the mixed solution of titanium chloride and hydrochloric acid followed by modification with sulfuric acid. The characterization of prepared catalyst was performed by using IR, XPS, XRD and DT-TGA. Infrared spectra of TiO₂/SO₄ ^2- showed bidentate sulfate ion coordinated to the surface of TiO₂. The acid strength of modified catalyst was at least H₀≤ -14.52, showing the superacidic properties which are attributed to the double bond nature of S=O of the complex formed by the interaction of TiO₂ with sulfate ion. For TiO₂/SO₄^2-, the specific surface area incr- eased and the transition from the amorphous to anatase phase occurred at a higher temperature, as compared with pure TiO₂.

[References]

Mills A, Porter G, J. Chem. Soc.-Faraday Trans., 78, 659 (1982)
Noda H, Oikawa K, Ogata T, Matsuki K, Kamada H, Nippon. Gakuka., 1084 (1986)
Schrauzer GN, Guth TD, J. Am. Chem. Soc., 99, 7189 (1977)
Wainwright MS, Forster NR, Catal. Rev.-Sci. Eng., 19, 211 (1979)
Vannice MA, J. Catal., 74, 199 (1982)
Kataoka T, Dumesic JA, J. Catal., 112, 66 (1988)
Odenbrand CUI, Andersson SLT, Andersson LAH, Brandin JGM, Busca G, J. Catal., 125, 541 (1990)
Morrison C, Kiwi J, J. Chem. Soc.-Faraday Trans., 85, 1043 (1989)
Itoh M, Hattori H, Tanabe K, J. Catal., 35, 225 (1974)
Fernandez A, Loyrer J, Gonzalez-Elipe AR, Munuera G, Knozinger H, J. Catal., 112, 489 (1988)
Miyata H, Fujii K, Ono T, J. Chem. Soc.-Faraday Trans., 84, 3121 (1988)
Machej T, Dounmain B, Yasse B, Delmon B, J. Chem. Soc.-Faraday Trans., 84, 3905 (1988)
Okazaki S, Kurosaki A, Chem. Lett., 751 (1978)
Takahashi O, Takagi M, Tanabe K, J. Catal., 68, 132 (1981)
Tanabe K, Hattori H, Chem. Lett., 625 (1976)
Takahashi O, Yamaguchi T, Sakuhara T, Hattori H, Tanabe K, Bull. Chem. Soc. Jpn., 53, 1807 (1980)
Sohn JR, Kim HJ, J. Catal., 101, 428 (1986)
Sohn JR, Kim HW, Kim JT, J. Mol. Catal., 41, 375 (1987)
Sohn JR, Kim HW, J. Mol. Catal., 52, 361 (1989)
Sohn JR, Pae YI, Jang HJ, Park MY, J. Catal., 127, 449 (1991)
Sohn JR, Jang HJ, J. Korean Ind. Eng. Chem., 1(1), 35 (1990)
Sohn JR, Ozaki A, J. Catal., 16, 29 (1980)
Jin T, Machida M, Tanabe K, Inorg. Chem., 23, 4396 (1984)
Nakamoto K, "Infrared and Raman Spectra of Inorganic and Coodination Compounds," 3rd ed., p. 241, Wiley, New York (1978)
Parfitt RL, Smart RC, J. Chem. Soc.-Faraday Trans., 73, 796 (1977)
Parry EP, J. Catal., 2, 371 (1963)
Hammett LP, Deyrup AJ, J. Am. Chem. Soc., 54, 2721 (1932)
Olah FGA, Prakash GKS, Sommer J, Science, 13, 206 (1979)
Wang GW, Hattori H, Tanabe K, Chem. Lett., 277 (1983)

[1] Mills A, Porter G, J. Chem. Soc.-Faraday Trans., 78, 659 (1982)

[2] Noda H, Oikawa K, Ogata T, Matsuki K, Kamada H, Nippon. Gakuka., 1084 (1986)

[3] Schrauzer GN, Guth TD, J. Am. Chem. Soc., 99, 7189 (1977)

[4] Wainwright MS, Forster NR, Catal. Rev.-Sci. Eng., 19, 211 (1979)

[5] Vannice MA, J. Catal., 74, 199 (1982)

[6] Kataoka T, Dumesic JA, J. Catal., 112, 66 (1988)

[7] Odenbrand CUI, Andersson SLT, Andersson LAH, Brandin JGM, Busca G, J. Catal., 125, 541 (1990)

[8] Morrison C, Kiwi J, J. Chem. Soc.-Faraday Trans., 85, 1043 (1989)

[9] Itoh M, Hattori H, Tanabe K, J. Catal., 35, 225 (1974)

[10] Fernandez A, Loyrer J, Gonzalez-Elipe AR, Munuera G, Knozinger H, J. Catal., 112, 489 (1988)

[11] Miyata H, Fujii K, Ono T, J. Chem. Soc.-Faraday Trans., 84, 3121 (1988)

[12] Machej T, Dounmain B, Yasse B, Delmon B, J. Chem. Soc.-Faraday Trans., 84, 3905 (1988)

[13] Okazaki S, Kurosaki A, Chem. Lett., 751 (1978)

[14] Takahashi O, Takagi M, Tanabe K, J. Catal., 68, 132 (1981)

[15] Tanabe K, Hattori H, Chem. Lett., 625 (1976)

[16] Takahashi O, Yamaguchi T, Sakuhara T, Hattori H, Tanabe K, Bull. Chem. Soc. Jpn., 53, 1807 (1980)

[17] Sohn JR, Kim HJ, J. Catal., 101, 428 (1986)

[18] Sohn JR, Kim HW, Kim JT, J. Mol. Catal., 41, 375 (1987)

[19] Sohn JR, Kim HW, J. Mol. Catal., 52, 361 (1989)

[20] Sohn JR, Pae YI, Jang HJ, Park MY, J. Catal., 127, 449 (1991)

[21] Sohn JR, Jang HJ, J. Korean Ind. Eng. Chem., 1(1), 35 (1990)

[22] Sohn JR, Ozaki A, J. Catal., 16, 29 (1980)

[23] Jin T, Machida M, Tanabe K, Inorg. Chem., 23, 4396 (1984)

[24] Nakamoto K, "Infrared and Raman Spectra of Inorganic and Coodination Compounds," 3rd ed., p. 241, Wiley, New York (1978)

[25] Parfitt RL, Smart RC, J. Chem. Soc.-Faraday Trans., 73, 796 (1977)

[26] Parry EP, J. Catal., 2, 371 (1963)

[27] Hammett LP, Deyrup AJ, J. Am. Chem. Soc., 54, 2721 (1932)

[28] Olah FGA, Prakash GKS, Sommer J, Science, 13, 206 (1979)

[29] Wang GW, Hattori H, Tanabe K, Chem. Lett., 277 (1983)