Sol–gel synthesis of 2-dimensional TiO2: self-assembly of Ti–oxoalkoxy–acetate complexes by carboxylate ligand directed condensation,Faraday Discussions

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Sol–gel synthesis of 2-dimensional TiO2: self-assembly of Ti–oxoalkoxy–acetate complexes by carboxylate ligand directed condensation
Faraday Discussions ( IF 3.3 ) Pub Date : 2020-1-6 , DOI: 10.1039/c9fd00108e
Ruohong Sui _{1,

2,

3,

4} , Connor E. Deering _{1,

2,

3,

4} , Rohen Prinsloo _{1,

2,

3,

4} , Christopher B. Lavery _{1,

2,

3,

4} , Nancy Chou _{1,

2,

3,

4} , Robert A. Marriott _{1,

2,

3,

4}

Affiliation

2-Dimensional (2D) metal oxides have many potential industrial applications including heterogeneous catalysis, water splitting, renewable energy conversion, supercapacitor applications, biomaterials, gas separation and gas storage. Herein we report a simple and scalable method for the preparation of 2D TiO₂ nanostructures by reaction of titanium isopropoxide with acetic acid at 333 K in isopropanol, followed by calcination at 673 K to remove the organic ligands. Both the products and reaction intermediates have been studied using electron microscopy, X-ray diffraction, N₂ physisorption, nuclear magnetic resonance, thermogravimetric analysis, and X-ray photoelectron, Raman, and infrared spectroscopy. The anisotropic condensation of the planar Ti₆O₄(OⁱPr)₈(OAc)₈ complex is believed to be responsible for the formation of the 2D structure, where OⁱPr and OAc represent isopropoxide and acetate ligands, respectively. This research demonstrates that the metal complexes are promising building blocks for desired architectures, and the self-assembly of an acetate bidentate ligand is a versatile tool for manipulating the shape of final products.

中文翻译：

二维TiO2的溶胶-凝胶合成：羧酸盐配体定向缩合的Ti-氧代烷氧基-乙酸盐配合物的自组装

二维（2D）金属氧化物具有许多潜在的工业应用，包括多相催化，水分解，可再生能源转化，超级电容器应用，生物材料，气体分离和气体存储。本文中，我们报告了一种简单而可扩展的制备二维TiO ₂纳米结构的方法，该方法是使异丙氧基钛与乙酸在333 K在异丙醇中反应，然后在673 K煅烧以除去有机配体。使用电子显微镜，X射线衍射，N ₂物理吸附，核磁共振，热重分析以及X射线光电子，拉曼和红外光谱研究了产物和反应中间体。平面Ti ₆ O的各向异性凝结_据信4（Oⁱ Pr）₈（OAc）₈络合物是2D结构形成的原因，其中Oⁱ Pr和OAc分别代表异丙醇和乙酸酯配体。这项研究表明，金属络合物是所需结构的有前途的构建基块，而乙酸二齿配体的自组装是操纵最终产品形状的通用工具。

更新日期：2020-01-06

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