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Nanoscale Res Lett. 2017 Dec;12(1):17. doi: 10.1186/s11671-016-1784-z. Epub 2017 Jan 6.

DNA@Mn3(PO4)2 Nanoparticles Supported with Graphene Oxide as Photoelectrodes for Photoeletrocatalysis.

Gao L1,2, Xie J1,2,3, Ma X1,2, Li M1,2, Yu L4,5.

Author information

1
Institute for Clean energy & Advanced Materials, Faculty of Materials & Energy, Southwest University, Chongqing, 400715, China.
2
Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Chongqing, 400715, China.
3
Institute of Materials Science and Devices, Suzhou University of Science and Technology, Suzhou, 215011, China.
4
Institute for Clean energy & Advanced Materials, Faculty of Materials & Energy, Southwest University, Chongqing, 400715, China. lingyu12@swu.edu.cn.
5
Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Chongqing, 400715, China. lingyu12@swu.edu.cn.

Abstract

A novel deoxyribose nucleic acid (DNA)-based photoelectrode consisting of DNA@Mn3(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 Mn3(PO4)2 nanoparticles in the synthesis of Mn3(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/cm2), the photocurrent density of DNA@ Mn3(PO4)2/GO electrodes reached 9 μA/cm2 at 0.7 V bias (vs. SCE). An applied bias photon-to-current efficiency (ABPE) of ~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.

KEYWORDS:

DNA; Mn3(PO4)2; Nanoparticle; Photoelectrocatalysis; Photoelectrode

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