[19a-211B-1~8] 4.1 Plasmonics and Nanophotonics

▼ [19a-211B-3] All-ceramic solar-driven water purifier based on anodized aluminum oxide and plasmonic titanium nitride

〇(D)Manpreet Kaur^1,2, Satoshi Ishii¹, Satish Laxman Shinde¹, Tadaaki Nagao^1,2 (1.National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, 2.Department of Condensed Matter Physics, Hokkaido University, Sapporo, Hokkaido, 060-0810)

Keywords:Titanium nitride, porous structure, aluminum oxide

Here, we demonstrate an efficient method of water purification and desalination using anodized aluminum oxide (AAO) with titanium nitride (TiN). While the ceramic TiN converts the incident light energy into thermal energy and generates a hot region at the water-vapor interface, AAO provides the efficient transport of water to the forefornt of water evaporation through its nanochannel. Our studies have shown that photothermal performance of TiN-AAO can be optimized by adjusting the pore diameter and TiN thickness. Additionally a thermal insulation by a facile technique was effective in improving the water evaporation speed. Low cost and concise design makes our structure portable material for the solar steam generation. It has 95% steam generation efficiency under solar irradiation of 100 mW cm^-2.