Yuan Guangbi, Agiral Anil, Pellet Norman, Kim Wooyul, Frei Heinz
Physical Biosciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA.
Faraday Discuss. 2014;176:233-49. doi: 10.1039/c4fd00150h. Epub 2014 Nov 28.
Co oxide (Co(3)O(4)) nanotubes are shown to act as an efficient water oxidation catalyst when driven with a visible light sensitizer (pH 7). The nanotubes form the core of a Co(3)O(4)-SiO(2) core-shell nanotube design for separating the carbon dioxide photoreduction from the oxygen evolution reaction. Amorphous dense phase silica of a few nanometers depth is shown to conduct protons while blocking molecular oxygen. Organic molecular wires embedded in the silica shell provide controlled charge transport between the light absorber on one side and the Co(3)O(4) catalyst on the other side. Hence, the silica shell is suitable as a membrane of an assembly for closing the photosynthetic cycle on the nanometer scale under product separation.
已表明，当用可见光敏化剂驱动时（pH值为7），氧化钴（Co₃O₄）纳米管可作为一种高效的水氧化催化剂。这些纳米管构成了Co₃O₄-SiO₂核壳纳米管设计的核心，用于将二氧化碳光还原与析氧反应分开。已表明，深度为几纳米的非晶态致密相二氧化硅可传导质子，同时阻挡分子氧。嵌入二氧化硅壳层中的有机分子线可在一侧的光吸收剂与另一侧的Co₃O₄催化剂之间提供可控的电荷传输。因此，二氧化硅壳层适合作为一种组件的膜，用于在纳米尺度上在产物分离的情况下完成光合循环。
