Mechanisms for Metal Oxide Particles Synthesized in Supercritical Water

Joo-Heon Lee; Jae-Yong Ham

Journal of Industrial and Engineering Chemistry, Vol.13, No.5, 835-841, September, 2007

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Mechanisms for Metal Oxide Particles Synthesized in Supercritical Water

Joo-Heon Lee , and Jae-Yong Ham^{1, †}

Department of Environmental Engineering Daegu University, Gyoungbuk 712-714, Korea
¹Department of Chemical Engineering Daegu University, Gyoungbuk 712-714, Korea

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Several metal oxide fine particles were synthesized from the aqueous metal salt solutions, varying experimental conditions. The synthesized particles were divided into three types (A, B, C) to investigate the synthetic mechanisms. Type A was a single metal oxide without a change in metal oxidation state. The synthetic mechanism included the hydrolysis and dehydration. Type B was a single metal oxide in the presence of a change in metal oxidation state. It was presumed that synthetic mechanism was proposed on the basis of the standard redox potential, E°. Type C was a complex metal oxide in the presence of a change in metal oxidation state. The proposed mechanism was influenced by the amount of OH- ion in the reactants.

Keywords:mechanism;supercritical water;metal oxide;synthesis;particles

[References]

Cabaoas A, Poliakoff M, J. Mater. Chem., 11, 1408 (2001)
Adschiri T, Kanazawa K, Arai K, J. Am. Ceram. Soc., 75, 1019 (1992)
Adschiri T, Hakuta Y, Arai K, Ind. Eng. Chem. Res., 39(12), 4901 (2000)
Hakuta Y, Terayama H, Onai S, Adschiri T, Arai K, in Proc. 4th Int. Symp. on Supercritical Fluids, pp. 255-258, Sendai, Japan (1997)
Hakuta Y, Adschiri T, Suzuki T, Chida T, Senio K, Arai K, J. Am. Ceram. Soc., 81, 2461 (1998)
Hakuta Y, Senio K, Ura H, Adschiri T, Takizawa H, Arai K, J. Mater. Chem., 9, 2671 (1999)
Hakuta Y, Yamamoto Y, Okada KL, Adschiri T, Arai K, Kanamura K, Goto A, Hamagami J, Umegaki T, in Proc. 40th Symp. in Japan on Battery, pp. 251-252, Kyoto, Japan (1999)
Lee JH, Park YW, J. Korean Ind. Eng. Chem., 10(1), 173 (1999)
Lee JH, Jun KS, Choi HJ, Cho WI, Cho BW, J. Korean Ind. Eng. Chem., 12(8), 859 (2001)
Lee JH, Kim MH, Choo KH, Ham JY, J. Korean Ind. Eng. Chem., 14(6), 847 (2003)
Lee JH, Ham JY, Korean J. Chem. Eng., 23(5), 714 (2006)
Veriansyah B, Kim JD, Lee JC, Hong D, J. Ind. Eng. Chem., 12(3), 395 (2006)
Cotton FA, Wilkinson G, Murillo CA, Bochmann M, Advanced Inorganic Chemistry, 6th Edn, p. 697, John Wiley & Sons, Inc., New York (1999)
Holleman AF, Wiberg E, Inorganic Chemistry, 34th Edn, p. 1405, Academic Press, San Diego (2001)
Bailar JC, Emeleus HJ, Nyholm SR, Trotman-Dickenson AF, Comprehensive Inorganic Chemistry, vol. 3, p. 798, Pergamon Press, New York (1976)
Lide DR, CRC handbook of Chemistry and Physics, 75th edition, p 8-22, CRC Press Inc (1994)
Holleman AF, Wiberg E, Inorganic Chemistry, 34th Edn, p. 1478, Academic Press, San Diego (2001)

[Related Articles]

[1] Cabaoas A, Poliakoff M, J. Mater. Chem., 11, 1408 (2001)

[2] Adschiri T, Kanazawa K, Arai K, J. Am. Ceram. Soc., 75, 1019 (1992)

[3] Adschiri T, Hakuta Y, Arai K, Ind. Eng. Chem. Res., 39(12), 4901 (2000)

[4] Hakuta Y, Terayama H, Onai S, Adschiri T, Arai K, in Proc. 4th Int. Symp. on Supercritical Fluids, pp. 255-258, Sendai, Japan (1997)

[5] Hakuta Y, Adschiri T, Suzuki T, Chida T, Senio K, Arai K, J. Am. Ceram. Soc., 81, 2461 (1998)

[6] Hakuta Y, Senio K, Ura H, Adschiri T, Takizawa H, Arai K, J. Mater. Chem., 9, 2671 (1999)

[7] Hakuta Y, Yamamoto Y, Okada KL, Adschiri T, Arai K, Kanamura K, Goto A, Hamagami J, Umegaki T, in Proc. 40th Symp. in Japan on Battery, pp. 251-252, Kyoto, Japan (1999)

[8] Lee JH, Park YW, J. Korean Ind. Eng. Chem., 10(1), 173 (1999)

[9] Lee JH, Jun KS, Choi HJ, Cho WI, Cho BW, J. Korean Ind. Eng. Chem., 12(8), 859 (2001)

[10] Lee JH, Kim MH, Choo KH, Ham JY, J. Korean Ind. Eng. Chem., 14(6), 847 (2003)

[11] Lee JH, Ham JY, Korean J. Chem. Eng., 23(5), 714 (2006)

[12] Veriansyah B, Kim JD, Lee JC, Hong D, J. Ind. Eng. Chem., 12(3), 395 (2006)

[13] Cotton FA, Wilkinson G, Murillo CA, Bochmann M, Advanced Inorganic Chemistry, 6th Edn, p. 697, John Wiley & Sons, Inc., New York (1999)

[14] Holleman AF, Wiberg E, Inorganic Chemistry, 34th Edn, p. 1405, Academic Press, San Diego (2001)

[15] Bailar JC, Emeleus HJ, Nyholm SR, Trotman-Dickenson AF, Comprehensive Inorganic Chemistry, vol. 3, p. 798, Pergamon Press, New York (1976)

[16] Lide DR, CRC handbook of Chemistry and Physics, 75th edition, p 8-22, CRC Press Inc (1994)

[17] Holleman AF, Wiberg E, Inorganic Chemistry, 34th Edn, p. 1478, Academic Press, San Diego (2001)