Department of Materials Science, School of Engineering, The University of Shiga Prefecture , Hikone, Shiga 522-8533, Japan.
Flexible Electronics Research Center (FLEC), National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba, Ibaraki 305-8565, Japan.
Langmuir. 2017 Jun 13;33(23):5685-5695. doi: 10.1021/acs.langmuir.7b01052. Epub 2017 Jun 5.
We describe efficient visible- and near-infrared (vis/NIR) light-driven photocatalytic properties of hybrids of CuO and plasmonic Cu arrays. The CuO/Cu arrays were prepared simply by allowing a Cu half-shell array to stand in an oxygen atmosphere for 3 h, which was prepared by depositing Cu on two-dimensional colloidal crystals with a diameter of 543 or 224 nm. The localized surface plasmon resonances (LSPRs) of the arrays were strongly excited at 866 and 626 nm, respectively, at which the imaginary part of the dielectric function of Cu is small. The rate of photodegradation of methyl orange was 27 and 84 times faster, respectively, than that with a CuO/nonplasmonic Cu plate. The photocatalytic activity was demonstrated to be dominated by Cu LSPR excitation. These results showed that the inexpensive CuO/Cu arrays can be excellent vis/NIR-light-driven photocatalysts based on the efficient excitation of Cu LSPR.
我们描述了氧化铜和等离子体铜阵列的混合物在可见光和近红外（vis/NIR）光驱动下的高效光催化性能。CuO/Cu 阵列是通过将 Cu 半壳阵列置于氧气气氛中 3 小时来制备的，该半壳阵列是通过在直径为 543 或 224nm 的二维胶体晶体上沉积 Cu 来制备的。阵列的局域表面等离子体共振（LSPR）分别在 866nm 和 626nm 处被强烈激发，此时 Cu 的介电函数虚部很小。与 CuO/非等离子体 Cu 板相比，甲基橙的光降解速率分别提高了 27 倍和 84 倍。光催化活性由 Cu LSPR 激发主导。这些结果表明，基于 Cu LSPR 的高效激发，廉价的 CuO/Cu 阵列可以成为出色的可见光/近红外光驱动光催化剂。
