▎ 摘　　要

A novel deoxyribose nucleic acid (DNA)-based photoelectrode consisting of DNA@Mn-3(PO4)(2) nanoparticles on graphene oxide (GO) sheets was successfully fabricated for photoelectrocatalysis. DNA served as a soft template to guide the nucleation and growth of Mn-3(PO4)(2) nanoparticles in the synthesis of Mn-3(PO4)(2) nanoparticles. More importantly, the DNA also serves as semiconductor materials to adjust charge transport. Under UV light irradiation (180-420 nm, 15 mW/cm(2)), the photocurrent density of DNA@Mn-3(PO4)(2)/GO electrodes reached 9 mu A/cm(2) at 0.7 V bias (vs. SCE). An applied bias photon-to-current efficiency (ABPE) of similar to 0.18% can be achieved, which was much higher than that of other control electrodes (<0.04%). In this DNA-based photoelectrode, well-matched energy levels can efficiently improve charge transfer and reduce the recombination of photogenerated electron-hole pairs.