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Synthesis of para ‐Amino Benzoic Acid–TiO 2 Hybrid Nanostructures of Controlled Functionality by an Aqueous One‐Step Process
Author(s) -
Rahal Raed,
Daniele Stéphane,
HubertPfalzgraf Liliane G.,
GuyotFerréol Véronique,
Tranchant JeanFrançois
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700971
Subject(s) - chemistry , nanomaterials , aqueous solution , raman spectroscopy , nanoparticle , benzoic acid , fourier transform infrared spectroscopy , x ray photoelectron spectroscopy , hydrolysis , carboxylate , nuclear chemistry , alkoxide , contact angle , nanostructure , inorganic chemistry , chemical engineering , nanotechnology , organic chemistry , catalysis , materials science , physics , engineering , optics
In situ amino acid surface‐modified TiO 2 nanoparticle syntheses were performed by a simple one‐pot hydrolysis of heteroleptic titanium alkoxide [Ti(O i Pr) 3 (O 2 CC 6 H 4 NH 2 )] m in water with N n Bu 4 Br. This process allowed precise control of the surface grafting rate by varying the amount of precursors and provided highly functionalized nanomaterials. Their compositions and microstructures were determined by C, H and N elemental analyses, TGA‐MS, 13 C CP‐MAS NMR, XRD, TEM, BET, Raleigh diffusion, FTIR, Raman, XPS and UV/Vis experiments. The results indicated that (i) the aggregation rate increased with an increase in the loading of the organic substrate and (ii) the amino acid is chemisorbed as a carboxylate group onto the TiO 2 nanoparticles, which leads to a strong interaction between the amino acid and the TiO 2 nanoparticle and good stability of these hybrids. Applications of low‐aggregated nanomaterials were demonstrated as efficient protection additive against UVA + UVB radiations.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)