Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 13, Issue 7, Pages 2809-2814Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0cp01353f
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Funding
- National Natural Science Foundation of China [20674030]
- Shandong Natural Science Foundation [ZR2010BM009]
- Key Subject (Laboratory) Research Foundation of Shandong Province
- Doctorial Foundation of University of Jinan [B0541]
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A novel route for a preparation of eccentric Au-titania core-shell nanoparticles using gold nanoparticles (AuNPs) with block copolymer shells as a template is reported. AuNPs with poly(2-vinyl pyridine)-block-poly(ethylene oxide) (PVP-b-PEO) block copolymer shells are first prepared by UV irradiation of the solution of PVP-b-PEO/HAuCl4 complexes. Then the sol-gel reaction of titanium tetra-isopropoxide (TTIP) selectively on the surfaces of AuNPs leads to Au-titania core-shell composite nanoparticles. The eccentric Au-titania core-shell nanoparticles are obtained from the Au-titania core-shell composite nanoparticles by removal of organic interlayer by UV treatment. Photocatalytic activities of the resulting eccentric core-shell nanoparticles are investigated in terms of the degradation of methylene blue (MB). The results show that the eccentric core-shell structures endow the catalyst with greatly enhanced photocatalytic activity.
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