Bahng, Seung-Hoon Kwon, Nan Hyun Kim, Hyung Cheol Siddique, Abu Bakkar Kang, Ho-Jung Lee, Jae Yeol Kim, Joohoon Kim, Sehoon Kim, Jungahn 2024-01-20T10:03:31Z 2024-01-20T10:03:31Z 2021-09-04 2014-04 1598-5032 https://pubs.kist.re.kr/handle/201004/126969 Versatile and direct synthesis of water-dispersible titanium dioxide (TiO2) nanoparticles in the presence of functionalized poly(ethylene oxide)s (PEO) having carboxylic acid groups is presented. The functionalized PEOs, such as PEO-folate conjugate and PEO-b-poly(maleic acid) (PEO-b-PMAc) as polymeric surfactants, were employed for in situ synthesis of TiO2 nanoparticles through hydrolytic sol-gel process of titanium tetrachloride as a precursor in eco-friendly alcoholic media at a relatively low temperature. Both of the two polymers were found to be very effective for stabilizing TiO2 nanocrystals, exhibiting not only fairly good photocatalytic activities but also water-dispersible property. The core TiO2 crystallites in the size range of 8 similar to 11 nm could be readily controlled in ethanol at a relatively low reaction temperature (70 degrees C), irrespective of the incipient reaction condition, which showed mixed polymorphs. The TiO2 nanoparticles consist of a few percentages (<10%) of brookite and mostly anatase phases. This process provides a simple and useful in situ preparative route to obtain water-dispersible TiO2 nanoparticles. English POLYMER SOC KOREA TIO2 ANATASE NANOPARTICLES PHOTOCATALYTIC DEGRADATION NANOCRYSTALLINE TITANIA SELECTIVE SYNTHESIS BLOCK-COPOLYMERS SOL-GEL SURFACE BROOKITE RUTILE SIZE Simple Synthesis of Water-Dispersible and Photoactive Titanium Dioxide Nanoparticles Using Functionalized Poly(ethylene oxide)s Article 10.1007/s13233-014-2062-5 1 MACROMOLECULAR RESEARCH, v.22, no.4, pp.445 - 456 MACROMOLECULAR RESEARCH 22 4 445 456 scie scopus kci ART001870593 000333213200014 2-s2.0-84898893076 Polymer Science Polymer Science Article TIO2 ANATASE NANOPARTICLES PHOTOCATALYTIC DEGRADATION NANOCRYSTALLINE TITANIA SELECTIVE SYNTHESIS BLOCK-COPOLYMERS SOL-GEL SURFACE BROOKITE RUTILE SIZE simple synthesis titanium dioxide nanoparticles photocatalytic activity functionalized poly(ethylene oxide)s