Processable aqueous dispersions of two-dimensional (2D) transition metal dichalcogenides (TMDs) nanosheets show extraordinary promise in assembling laminar films for a variety of applications but are usually limited by the oxidation of adsorbed water molecular on the edge and defect regions, which damage the stability of the colloidal solution and electric properties of the resulted films. In this work, we developed a pre-protection strategy by adding ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) as the protective agent into TiS 2 nanosheets aqueous dispersions. The introduction of EDTA-2Na can effectively slow down the adsorption and decomposition of confined water molecules and enhance the oxidation resistance of TiS 2 nanosheets in the colloidal solution. Compared with the untreated TiS 2 nanosheets, the storage time of the pre-protected nanosheets in aqueous dispersions can be significantly improved, and the electrical conductivity of...

中文翻译：

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在TiS 2纳米片的可加工水分散液中执行预保护策略，以制备具有改善的电性能的层状薄膜

二维（2D）过渡金属双金属卤化物（TMDs）纳米片的可加工水分散体在组装用于各种应用的层状薄膜中显示出非凡的前景，但通常受到边缘和缺陷区域上吸附水分子的氧化的限制，从而损坏了胶体溶液的稳定性和所得薄膜的电性能。在这项工作中，我们通过将乙二胺四乙酸二钠盐（EDTA-2Na）作为保护剂添加到TiS 2纳米片水分散体中，开发了一种预保护策略。EDTA-2Na的引入可有效减慢承压水分子的吸附和分解，并增强TiS 2纳米片在胶体溶液中的抗氧化性。与未处理的TiS 2纳米片相比，