Au(core)-metal chalcogenide(shell) half-cut nanoegg-type plasmonic photocatalyst for solar-to-chemical transformation

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05654
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic industrial materials
• Research Institution: Kindai University
• Principal Investigator: TADA Hiroaki 近畿大学, 理工学部, 教授 (60298990)
• Research Collaborator: NAYA Sin-ichi 近畿大学, 有害物質処理室, 技術主任
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 光触媒

Outline of Final Research Achievements

A key material for artificial photosynthesis including water splitting is heteronanostructured (HNS) photocatalysts. The photocatalytic activity depends on the geometry and dimension, and the quality of junctions between the components. Here we present a half-cut Au(core)-CdS(shell) (HC-Au@CdS) nanoegg as a new HNS plasmonic photocatalyst for water splitting. UV-light irradiation of Au nanoparticle (NP)-loaded ZnO (Au/ZnO) at 50oC induces the selective deposition of hexagonal CdS on the Au surface of Au/ZnO with an epitaxial (EPI) relation of CdS{0001}/Au{111}. The subsequent selective dissolution of the ZnO support at room temperature yields HC-Au@CdS with the Au NP size and EPI junction (#) retained. Red-light irradiation (excitation wavelength = 640 nm) of HC-Au@#CdS gives rise to continuous stoichiometric water splitting with an unprecedentedly high external quantum yield of 0.24%.

Free Research Field

光電気化学