A novel ABA-type triblock copolymer, i.e. poly(oxyethylene methacrylate)-b-polystyrene-b-poly(oxyethylene methacrylate) (POEM-b-PS-b-POEM) was synthesized via atom transfer radical polymerization (ATRP). This amphiphilic triblock copolymer was used to template the growth of TiO2 from a titanium isopropoxide through sol-gel process in the solid state film. The hydrophilic titania precursor was selectively incorporated into hydrophilic POEM domains and formed TiO2 nanoparticle arrays, mostly due to microphase separation between the PS domains and the POEM/TiO2 domains. High-density arrays of TiO2 nanoparticles with 30-40 nm size after calcinations at 550 °C were confirmed by X-ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, wide angle X-ray scattering (WAXS) and transmission electron microscopy (TEM). The resultant TiO2 nanoparticles showed high photocatalytic activity on the photodegradation of humic acid.
|Number of pages||7|
|Journal||Colloids and Surfaces A: Physicochemical and Engineering Aspects|
|Publication status||Published - 2008 Oct 15|
Bibliographical noteFunding Information:
This work was supported by Seoul Research and Business Development Program (Seoul RNBD program, NT070087) and the MOCIE new and renewable energy R&D project under contract 2006-N-PV12-P-05.
All Science Journal Classification (ASJC) codes
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry