Gao Lixia, Xie Jiale, Ma Xiaoqing, Li Man, Yu Ling
Institute for Clean energy & Advanced Materials, Faculty of Materials & Energy, Southwest University, Chongqing, 400715, China.
Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies, Chongqing, 400715, China.
Nanoscale Res Lett. 2017 Dec;12(1):17. doi: 10.1186/s11671-016-1784-z. Epub 2017 Jan 6.
A novel deoxyribose nucleic acid (DNA)-based photoelectrode consisting of DNA@Mn(PO) 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(PO) nanoparticles in the synthesis of Mn(PO) nanoparticles. More importantly, the DNA also serves as semiconductor materials to adjust charge transport. Under UV light irradiation (180-420 nm, 15 mW/cm), the photocurrent density of DNA@ Mn(PO)/GO electrodes reached 9 μA/cm 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.
一种新型的基于脱氧核糖核酸（DNA）的光电极成功制备用于光电催化，该光电极由氧化石墨烯（GO）片上的DNA@Mn(PO)纳米颗粒组成。在合成Mn(PO)纳米颗粒时，DNA作为软模板引导Mn(PO)纳米颗粒的成核和生长。更重要的是，DNA还作为半导体材料来调节电荷传输。在紫外光照射（180 - 420 nm，15 mW/cm）下，DNA@Mn(PO)/GO电极在0.7 V偏压（相对于饱和甘汞电极）下的光电流密度达到9 μA/cm。可以实现约0.18%的外加偏压光子到电流效率（ABPE），这比其他对照电极（<0.04%）高得多。在这种基于DNA的光电极中，匹配良好的能级可以有效地改善电荷转移并减少光生电子 - 空穴对的复合。
