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Electrosynthesis of Layered Organo-Manganese Dioxide Framework-Doped with Cobalt for Iodide Sensing
Langmuir ( IF 3.7 ) Pub Date : 2017-05-02 00:00:00 , DOI: 10.1021/acs.langmuir.7b00419 Kimiko Nakagawa 1 , Kanon Suzuki 1 , Misa Kondo 2 , Shinjiro Hayakawa 2 , Masaharu Nakayama 1
Langmuir ( IF 3.7 ) Pub Date : 2017-05-02 00:00:00 , DOI: 10.1021/acs.langmuir.7b00419 Kimiko Nakagawa 1 , Kanon Suzuki 1 , Misa Kondo 2 , Shinjiro Hayakawa 2 , Masaharu Nakayama 1
Affiliation
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Aqueous Mn2+ ions were anodized at 70 °C with Co2+ in the presence of cationic surfactant, cetyltrimethylammonium (CTA). X-ray diffraction (XRD) analysis revealed that the deposited film possesses a layered structure of MnO2, the interlayer of which is occupied with the assembled CTA molecules. Inclusion of Co ions in the MnO2 film was evidenced by X-ray photoelectron spectroscopy (XPS). They were located in the MnO2 framework, not in the interlayer. The thus-obtained film, CTA-intercalated Co-framework-doped layered MnO2 (CTA/Co-MnO2), was applied as an electrochemical sensor toward iodide (I–), a hydrophobic anion. The organic phase between MnO2 layers could extract I– ions from solution, providing a better sensitivity than a film consisting of layered MnO2 with hydrated alkali metals. On the other hand, the Co-doped layers of MnO2 achieved faster electron transfer kinetics for the oxidation of I–, which resulted in a drastic reduction in response time compared to the nondoped CTA/MnO2.
中文翻译：
钴掺杂碘的层状有机锰氧化物骨架的电合成
在阳离子表面活性剂十六烷基三甲基铵（CTA）的存在下，Mn 2+水溶液在70°C下用Co 2+进行阳极氧化。X射线衍射（XRD）分析表明，沉积膜具有MnO 2的层状结构，其中间层被组装的CTA分子占据。X射线光电子能谱法（XPS）证实了MnO 2膜中包含Co离子。它们位于MnO 2骨架中，而不位于中间层中。如此获得的薄膜，经CTA嵌入共骨架掺杂的层状MnO 2（CTA / Co-MnO 2），被用作对碘化物（I –），疏水性阴离子。的MnO之间的有机相2层可以提取我-从溶液中的离子，从而提供比由分层的MnO的膜更好的灵敏度2与水合碱金属。在另一方面，的MnO的共掺杂层2来实现更快的电子转移动力学I的氧化- ，这就造成了在响应时间的显着降低相对于未掺杂的CTA /的MnO 2。
更新日期：2017-05-09
中文翻译：
钴掺杂碘的层状有机锰氧化物骨架的电合成
在阳离子表面活性剂十六烷基三甲基铵（CTA）的存在下，Mn 2+水溶液在70°C下用Co 2+进行阳极氧化。X射线衍射（XRD）分析表明，沉积膜具有MnO 2的层状结构，其中间层被组装的CTA分子占据。X射线光电子能谱法（XPS）证实了MnO 2膜中包含Co离子。它们位于MnO 2骨架中，而不位于中间层中。如此获得的薄膜，经CTA嵌入共骨架掺杂的层状MnO 2（CTA / Co-MnO 2），被用作对碘化物（I –），疏水性阴离子。的MnO之间的有机相2层可以提取我-从溶液中的离子，从而提供比由分层的MnO的膜更好的灵敏度2与水合碱金属。在另一方面，的MnO的共掺杂层2来实现更快的电子转移动力学I的氧化- ，这就造成了在响应时间的显着降低相对于未掺杂的CTA /的MnO 2。
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