[RSC Advances] Spatially-controlled Growth of Platinum on Gold Nanorods with Tailoring Plasmonic and Catalytic Properties
writer：Yun Rong, Anirban Dandapat, Youju Huang,* Yoel Sasson, Lei Zhang, Liwei Dai, Jiawei Zhang, Tao Chen*
keywords：AuNR@dendritic-Pt, PVDF film, Separation, catalytic activity
source：期刊
specific source：RSC ADV, 2016, 2016, 6, 10713-10718
Issue time：2016年
We have described the synthesis of bimetallic dendritic platinum
decorated gold nanorods (AuNR@dendritic-Pt) by spatial control of Pt growth
over gold nanorods (AuNRs) via a heterogeneous seed-mediated growth method at
room temperature. Amounts of the Au seed and Pt-precursor were accustomed to
achieve a tunable volume fraction of Pt coverage on the Au NRs surface. Pt nanostructures
(NPs) were spatially separated from each other, which was highly favorable for
promising optical and catalytic properties. The AuNR@dendritic-Pt
nanostructures with variable Au/Pt ratio were exploited to study their surface
plasmonic properties and catalytic activities. Interestingly, Pt decorated
AuNRs resemble strong surface plasmon resonance (SPR) peak due to noncompact
dendritic Pt shell in contrast to the conventional core-shell Au@Pt nanoparticles
(NPs). Moreover, the longitudinal peak of Au NR was finely tuned from 820 to
950 nm (NIR region) by controlling the volume fraction of Pt decoration over
the Au NRs. The catalytic activity of AuNR@dendritic-Pt was studied on the
reduction of 4-nitrophenol (4-NP) by sodium borohydride (NaBH4) as
reducing agent and found to be superior to the activities compared to
monometallic Au NRs. Considering practical application, AuNR@dendritic-Pt
nanostructures were successfully immobilized on the hydrophilic polyvinylidene
difluoride (PVDF) film as an efficient reusable catalyst.