Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 20, Issue 4, Pages 677-682Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b917858a
Keywords
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Funding
- National Research Foundation of Korea
- Korean Government [20090063000, 20090059858, 20090075031]
- National Research Foundation [20090067295]
- Ministry of Education, Science & Technology (MEST), Korea
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Two-dimensional (2D) arrays of hybrid CdS/TiO2 composite nanodots were fabricated on solid substrates using amphiphilic poly(styrene-block-ethylene oxide) diblock copolymer (PS-b-PEO) micelles as templates loaded with CdS nanoparticles (NPs) and TiO2 sol-gel precursors. The inorganic precursors were selectively incorporated into PEO domains of PS-b-PEO due to the specific interactions. The addition of CdS quantum dots (QDs) into thin films of the PS-b-PEO/TiO2 sol-gel mixture led to the morphological changes from mixed wire/hexagonal dot to well-defined, quasi-hexagonal dot arrays. The PS-b-PEO/TiO2/CdS system showed an enhanced absorption along with red shift behavior in the UV-visible spectral range compared with the PS-b-PEO/TiO2 films. Photoluminescence (PL) studies showed a quenching of CdS emission in the presence of TiO2. An enhanced photocatalytic degradation of methylene blue (MB) was observed in the hybrid PS-b-PEO/TiO2/CdS thin film.
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