期刊
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
卷 33, 期 9, 页码 602-609出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.201600085
关键词
composite materials; photocatalysis; SERS sensors; surface plasmon resonance
资金
- Major Program of the National Natural Science Foundation of China [21590813]
- National Natural Science Foundation of China [21207015, 21577012, 21377015]
- Fundamental Research Funds for the Central Universities [DUT14LK39]
- Key Laboratory of Industrial Ecology and Environmental Engineering, China Ministry of Education
A new type of multifunctional plasmonic nanoparticles, cobalt-doped Fe2O3@polydopamine-Au (Co-Fe2O3@PDA-Au), is fabricated via coating PDA through self-polymerization onto Co-Fe2O3 and further loading gold nanoparticles by in situ reduction onto the surface of PDA shell. Benefiting from the universal adhesive ability of PDA and negative zeta potetntial of the composite, the Co-Fe2O3@PDA-Au shows strong adsorptivity for cationic dyes. The presence of gold nanoparticle with the diameter of 15 nm in the Co-Fe2O3@PDA-Au system promotes surface-enhanced Raman scattering (SERS) activity with an impressive detection limit of 1 x 10(-6) m. Thanks to the synergistic effect of the light harvesting of PDA, the surface plasmon resonance of Au, and the electron conductibility of PDA and Au, the Co-Fe2O3@PDA-Au exhibits an enhanced photocatalytic activity comparing with unmodified Co-Fe2O3. All the above-mentioned functions enable Co-Fe2O3@PDA-Au to be a multifunctional material system for various applications toward environmental pollutants.
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