Surface modification of titanium oxide nanocrystals with PEG

In this study, surface modification of titanium oxide nanocrystals has been considered. peg wasemployed to make bio-conjugated tio2 nanopowders (tnps). on the basis of the modification process, theeffect of peg on the size and morphology of prepared samples has been evaluated. it was found that theaddition stage of peg plays a critical role in the characteristics of tio2 nanopowders. it was shown thatpeg affects solgel reactions and the crystallization process of the prepared titanium oxide nanoparticles.peg must be added before starting the synthesis to get well-defined size distribution, compared to postsynthesis.however, tio2/peg nanoparticles synthesized by the second approach have good photocatalyticperformance, and the photodecomposition test of methylene blue proves that the addition of peg after thesynthesis of tio2 improves the photocatalytic properties of prepared tio2 nanoparticles. this phenomenonwill affect tio2 functionality, as well.