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Surface Modification of TiO 2 Nanoparticles with Vitamin B 12 : Relationships between Vitamin B 12 Content and Its Optical Properties
Author(s) -
Gharagozlou Mehrnaz,
Naghibi Sanaz
Publication year - 2015
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201500338
Subject(s) - chemistry , anatase , fourier transform infrared spectroscopy , nanoparticle , adsorption , particle size , photoluminescence , photocatalysis , chemical engineering , molecule , infrared spectroscopy , nuclear chemistry , analytical chemistry (journal) , chromatography , organic chemistry , catalysis , materials science , optoelectronics , engineering
Anatase TiO 2 nanoparticles (NPs) with particle size of 10–20 nm were prepared via sol gel technique. The as‐synthesized NPs were immerged in vitamin B 12 (VB 12 ) solutions with different concentrations. The in‐ fluences of the solution concentration on photoluminescence and photocatalytic activity of the modified NPs were studied. Fourier transform infrared spectroscopy (FTIR) results demonstrated that TiO 2 NPs adsorb VB 12 molecules and that a new band is formed at ∼2300 cm −1 . The VB 12 loading process led to dimin‐ ishing of the aggregation of NPs and formation of a fibre shape structure. The best photoactivity and PL effect among the modified samples was related to sample ‘d’. The optimum processing conditions to achieve this sample was found to be VB 12 concentration of 5 g/L.