One-Step Electrodeposition of Multilayered Surfactant/MnO2 Composite and Its Electrochemistry
One-Step Electrodeposition of Multilayered Surfactant/MnO2 Composite and Its Electrochemistry
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多层表面活性剂/MnO2复合材料的一步电沉积及其电化学
DOI：
10.1149/05036.0035ecst
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Masaharu Nakayama
中科院分区：
文献类型：
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作者：
Mitsuhiro Shamoto;Shunsuke Mito;Kazuaki Tomono;Masaharu Nakayama
通过在十六烷基三甲基铵 (CTA) 离子存在下对含水 Mn (II) 离子进行阳极氧化，合成了嵌入表面活性剂分子的多层二氧化锰薄膜。在不同电解质（Na2SO4、十二烷基硫酸钠 (NaDS)、苯磺酸钠 (NaBS) 和十二烷基三甲基氯化铵）中检查了 CTA/MnO2 纳米复合材料的离子交换和电化学性能。电沉积过程中掺入 MnO2 层之间的 CTA+ 阳离子不与溶液中的 Na+ 进行离子交换，这可能是其长烷基链之间疏水相互作用的结果。根据XPS分析，表面活性剂的阳离子头基不仅与MnO2层上的负电荷偶联，而且还与Cl-阴离子偶联。这些Cl-阴离子很容易被SO4 2- 和BS- 取代，这意味着在夹层中安装了阴离子交换位点。仅在NaBS电解质中，CTA/MnO2薄膜提供了良好的电化学响应而不释放CTA+离子，其中薄膜的电中性由Na+离子维持。
Multilayered manganese dioxide film intercalated with surfactant molecules was synthesized by anodic oxidation of aqueous Mn (II) ions in the presence of cetyltrimethylammonium (CTA) ions. Ionexchange and electrochemical properties of the CTA/MnO2 nanocomposite were examined in different electrolytes (Na2SO4, sodium dodecylsulfate (NaDS), sodium benzenesulfonate (NaBS), and dodecyltrimethylammonium chloride). CTA+ cations that were incorporated between MnO2 layers during electrodeposition were not ion-exchanged with Na+ in solution, probably as a result of hydrophobic interaction between their long alkyl chains. According to XPS analysis, cationic head groups of the surfactants were coupled with not only negative charges on MnO2 layers but also Cl-anions. These Cl-anions were readily replaced with SO4 2-and BS-, which means installation of anion exchange sites in the interlayer. Only in NaBS electrolyte, the CTA/MnO2 film provided a good electrochemical response without releasing the CTA+ ions, where the electroneutrality of the film was maintained by Na+ ions.