Abstract
Fe(III)-doped TiO2 aerogels are prepared by acid catalyzed sol–gel method followed by supercritical drying, and then heat treatment. Raman spectra together with X-ray diffraction (XRD) and selected area electron diffraction (SAED) patterns of the iron-doped TiO2 aerogel samples revealed the existence of both anatase and brookite crystalline phases. It was found that the brookite phase formation is favored by the increase of the iron content in the dried samples. XRD measurements show that the lattice constant c of anatase phase decreases with the dopant addition, while the value of a remains essentially unchanged. The microstructure of the investigated samples is relatively compact with small mesopores as revealed from transmission electron microscopy (TEM). The most enhanced photocatalytic activity was exhibited by the TiO2 aerogel sample with 1.8 at.% Fe(III) whose apparent rate constant of the salicylic acid photodegradation was found to be of almost six times higher than that of Degussa P25.
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Bahnemann D, Cunningham J, Fox MA, Pelizzetti E, Serpone N (1994) In: Helz GR, Zepp RG, Crosby DG (eds) Aquatic and surface photochemistry. Lewis Publisher, Boca Raton, FL
Ollis DF, Al-Ekabi H (1993) Photocatalytic purification and treatment of water and air. Elsevier, Amsterdam
Hoffmann MR, Martin ST, Choi W, Bahnemann DW (1995) Chem Rev 95:69
Pichat P (1994) Catal Today 19:313
Wang C-Y, Liu C-Y, Shen T (1997) J Photochem Photobiol A 109:65
Wang C-Y, Liu C-Y (2002) In: Hubbard A, Barbara S (eds) Encyclopedia of surface and colloid science. Marcel Dekker, NY, p 4926
Wang C-Y, Liu C-Y, Zheng X, Chen J, Shen T (1998) Colloids Surf A 131(1–3):271
Wang C-Y, Liu C-Y, Chen J, Shen T (1997) J Colloid Interf Sci 191:464
Cao Y, Zhang X, Yang W, Du H, Bai Y, Li T, Yao J (2000) Chem Mater 12:3445
Tada H, Hattori A, Tokihisa Y, Imai K, Tohge N, Ito S (2000) J Phys Chem B 104:4585
Wang C-Y, Bahnemann D, Dohrmann JK (2000) Chem Commun 1539
Wang JA, Limas-Ballesteros R, Lopez T, Moreno A, Gomez R, Novaro O, Bokhimi X (2001) J Phys Chem B 105:9692
Barau (Szatvanyi) A, Crisan M, Gartner M, Danciu V, Cosoveanu V, Marian I, Anastasescu M, Zaharescu M (2005) Mat Sci Forum 492–493:311
Barau (Szatvanyi) A, Crisan M, Gartner M, Jitianu A, Zaharescu M, Ghita A, Danciu V, Cosoveanu V, Marian I (2006) J Sol-Gel Sci Tech 37:175
Kelly S, Pollak FH, Tomkiewicz M (1997) J Phys Chem B 101:273
Zhu Z, Lin M, Dagan G, Tomkiewicz M (1995) J Phys Chem 99:15953
Peter A, Danciu V, Cosoveanu V, Moldovan Z, Indrea E, Nutiu G, Baia L, Rosu I (2005) In: Proceedings of innovations in the field of water supply sanitation and water quality management, p 103
Wang C-Y, Bottcher C, Bahnemann DW, Dohrmann JK (2003) J Mat Chem 13:2322
Baia L, Baia M, Peter A, Cosoveanu V, Danciu V (2007) J Optoelectr Adv Mater 9(3):668
Ryu J, Choi W (2008) Environ Sci Technol 42:294–300
Ohsaka T, Izumi F, Fujiki Y (1978) J Raman Spectrosc 7:321
Adan C, Bahamonde A, Fernandez-Garcia M, Martinez-Arias A (2007) Appl Catal B Environ 72:11–17
Zhang YH, Chan CK, Porter JF, Guo W (1998) J Mater Res 13:2602
Busca G, Ramis G, Amores JMG, Escribano VS, Piaggio P (1994) J Chem Soc Faraday Trans 90:3181
Gotic M, Ivanda M, Sekulic A, Music S, Popovic S, Turkovic A, Furic K (1996) Mater Lett 28:225
Tompsett GA, Bowmaker GA, Cooney BP, Metson JB, Rodgers KA, Seakins JM (1995) J Raman Spectrosc 26:57
Kelly S, Pollak FH, Tomkiewicz M (1997) J Phys Chem B 101:2730
Baia L, Peter A, Cosoveanu V, Indrea E, Baia M, Popp J, Danciu V (2006) Thin Solid Films 511–512:512
Choi HC, Jung YM, Kim SB (2005) Vibrat Spectrosc 37:33
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Popa, M., Diamandescu, L., Vasiliu, F. et al. Synthesis, structural characterization, and photocatalytic properties of iron-doped TiO2 aerogels. J Mater Sci 44, 358–364 (2009). https://doi.org/10.1007/s10853-008-3147-3
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DOI: https://doi.org/10.1007/s10853-008-3147-3