[18p-211B-1~13] 4.1 Plasmonics and Nanophotonics

▼ [18p-211B-12] Plasmonic nanoparticles/reduced graphene oxide sensitized hierarchical TiO₂ nanorods for solar water splitting

〇(DC)HsinChia Ho¹, Kai Chen^2,3, Tadaaki Nagao^3,4,5, ChunHway Hsueh¹ (1.NTU, 2.JNU, 3.NIMS, 4.JST, 5.Hokkaido Univ.)

Keywords:localized surface plasmon resonance, photoelectrochemical water splitting

In order to improve the photoresponse of TiO₂ in the visible region, we introduced gold triangular nanoprisms (TNPs) with distinctive localized surface plasmon resonance (LSPR) and reduced graphene oxide (rGO) sheets with excellent electrical conductivity to the highly branched TiO₂ nanorod arrays. We conducted systematic photoactivity measurements including linear sweep voltammetry (LSV), incident photon-to-electron conversion efficiency (IPCE), electrochemical impedance spectroscopy (EIS). The pronouced results demonstrated that our work has the advantages of combining the LSPR effect of Au TNPs with highly conductive rGO to result in the enhanced photoelectrochemical (PEC) water splitting performance than the pristine TiO₂.