Lou Yongbing, Zhang Yake, Cheng Lin, Chen Jinxi, Zhao Yixin
School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart, Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, PR China.
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
ChemSusChem. 2018 May 9;11(9):1505-1511. doi: 10.1002/cssc.201800249. Epub 2018 Apr 16.
The localized surface plasmon resonance (LSPR) effect has been widely utilized in photocatalysis, but most reported LSPR materials are based on noble metals of gold or silver with high chemical stability. Plasmonic copper nanoparticles that exhibit an LSPR absorbance at 600 nm are promising for many applications, such as photocatalysis. Unfortunately, plasmonic copper nanoparticles are affected by serious surface oxidation in air. Herein, a novel lollipop-shaped Cu@Cu O/ZnO heterojunction nanostructure was designed, for the first time, to stabilize the plasmonic Cu core by decorating Cu@Cu O core-shell structures with ZnO nanorods. This Cu@Cu O/ZnO nanostructure exhibited significantly enhanced stability than that of regular Cu@Cu O, which accounted for the remarkably enhanced photocatalytic H evolution rate through water splitting, relative to pristine ZnO nanorods, over an extended wavelength range due to the plasmonic Cu core.
局域表面等离子体共振（LSPR）效应已在光催化中得到广泛应用，但大多数报道的LSPR材料基于化学稳定性高的金或银等贵金属。在600 nm处表现出LSPR吸光度的等离子体铜纳米颗粒在许多应用中具有潜力，如光催化。不幸的是，等离子体铜纳米颗粒在空气中会受到严重的表面氧化影响。在此，首次设计了一种新型的棒棒糖状Cu@CuO/ZnO异质结纳米结构，通过用ZnO纳米棒修饰Cu@CuO核壳结构来稳定等离子体铜核。这种Cu@CuO/ZnO纳米结构表现出比普通Cu@CuO显著增强的稳定性，这解释了由于等离子体铜核，在较宽波长范围内相对于原始ZnO纳米棒，通过水分解实现的光催化析氢速率显著提高。
