The preparation of nano-gold catalyst supported on iron doped titanium oxide
Tiếng Anh
Tóm tắt
We have prepared iron doped TiO2 samples by the impregnation of TiO2 (Degussa—P25) with Fe(III) nitrate as an iron precursor. Obtained materials were then characterized by structural x-ray diffraction (XRD) and optical (Uv-vis, Raman) techniques. Later, we deposited very small gold nanoparticles (AuNPs; <5 nm) onto as-prepared supports by a colloidal deposition method, in which lysine was used as a capping agent and a short sonication time was applied to facilitate the dispersion and deposition of AuNPs. The presence of Fe+3 in the TiO2 structure was confirmed by an increase in the number of oxygen defect sites that react with O2 to form reactive oxygen species. Transmission electron microscopy (TEM) was used to determine the size of the gold particles before and after deposition. The AuNPs deposited on the FeTiO2 exhibited good thermal stability against sintering, even at 500 °C for 4 h.
Tài liệu tham khảo
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[3] Vaden M, Lai X and Goodman D W 1998 Science 281 1647
[4] Baiker A and Grunwaldt J D 1999 J. Phys. Chem. 103 1002
[5] Dang T M D, Le D D, Chau V T and Dang M C 2010 Adv. Nat. Sci.: Nanosci. Nanotechnol. 1 015004
[6] Le D D, Dang T M D, Chau V T and Dang M C 2010 Adv. Nat. Sci.: Nanosci. Nanotechnol. 1 015007
[7] Luu C L, Nguyen Q T and Ho S T 2010 Adv. Nat. Sci.: Nanosci. Nanotechnol. 1 015008
[8] Carrettin S, Hao Y, Guerrero V A, Gates B C, Trasobares S, Calvino J J and Corma A 2007 Chem. Eur. J. 13 7771
[9] Schwartz V, Mullins D R, Yan W, Chen B, Dai S and Overburry S H 2004 J. Phys. Chem. B 108 15782
[10] Hirano M, Joji T and Inagaki M 2004 J. Am. Ceram. Sci. 4 35
[11] Adan C, Bahamonde A, Garcia F M and Arias A M 2007 Appl. Catal. B: Environ. 72 11
[12] Navio J A, Macias M, Gonzalez-Catalan M and Justo A 1992 J. Mater. Sci. 27 3026
[13] Zhong Z, Lin J, Teh S P, Teo J and Dautzenberg F M 2007 Adv. Funct. Mater. 17 1402
[14] Comotti M, Li W C, Spliethoff B and Schuth F 2006 J. Am. Chem. Soc 128 917
[15] Wei-Hua W and Geng-Yu C 2006 Chin. J. Chemi. 24 817 [16] Hammer N, Kvande I, Xu X, Gunnarsson V, Totdal B, Chen D and Rønning M 2007 Catal. Today 123 245
[17] Zhong Z, Teo J, Lin M and Ho J 2008 Top. Catal. 49 216
[18] Hung W C, Fu S H, Tseng J J, Chu H and Ko T H 2007 Chemosphere 66 2142
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