▎ 摘　　要

In this study, graphene oxide/gold/methylene blue (GO/Au/MB) ternary composites were synthesized and characterized through UV-vis, FTIR, XRD, XPS, SEM, and TEM analyses towards plasmon-enhanced singlet oxygen (O-1(2)) generation. Through using gold nanoparticles and MB photosensitizers, the visible light adsorption capability of GO was enhanced by 115%. Moreover, applying this ternary composite as a photocatalyst under visible light interestingly revealed a drastic step-increase of 14% (i.e., from 9 to 23%) in the conversion of photooxygenation of Anthracene. This behavior was rationalized using finite-difference time-domain (FDTD) simulations which confirms the plasmonic field of gold nanoparticles with a diameter of 16 nm obtained from TEM. Time-dependent density functional theory (TD-DFT) calculations suggest that the presence of an electric field can favor the intersystem crossing of methylene blue to enhance O-1(2) generation. [GRAPHICS]