Nanocrystalline todorokite-like manganese oxide produced by bacterial catalysis
Nanocrystalline todorokite-like manganese oxide produced by bacterial catalysis
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DOI：
10.1021/ja0375784
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发表时间：
2003-11-26
影响因子：
15
通讯作者：
Stair, PC
中科院分区：
文献类型：
--
作者：
Kim, HS;Pastén, PA;Stair, PC
我们使用组合透射电子显微镜 (TEM)、扩展 X 射线吸收精细结构 (EXAFS) 和紫外拉曼光谱描述了由淡水细菌 Leptothrix discophoraSP-6 产生的未知且难以识别但具有地球化学和环境意义的 MnOx 结构的表征。细菌细胞周围形成的针状纳米晶 MnO2 与多孔沸石状结构耦合，具有较大的表面积与体积比，具有催化反应、氧化和吸附金属的潜力。
We describe the characterization of an unknown and difficult to identify but geochemically and environmentally significant MnOxstructure produced by a freshwater bacterium,Leptothrix discophoraSP-6, using combined transmission electron microscopy (TEM), extended X-ray absorption fine structure (EXAFS), and UV Raman spectroscopy. The large surface-to-volume ratio of the needle-shaped nanocrystalline MnO2formed around the bacterial cells coupled to the porous, zeolite-like structure has the potential to catalyze reactions and oxidize and adsorb metals.