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首页> 外文期刊>Chemistry of Materials: A Publication of the American Chemistry Society >A Universal Method for the Preparation of Dual Network Reduced Graphene Oxide-Ceramic/Metal Foam Materials with Tunable Porosity and Improved Conductivity
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A Universal Method for the Preparation of Dual Network Reduced Graphene Oxide-Ceramic/Metal Foam Materials with Tunable Porosity and Improved Conductivity

机译：一种通用方法，用于制备双网络的氧化石墨烯氧化物/金属泡沫材料，可调节孔隙率和改善的导电性

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摘要

Inorganic porous materials have found a great many applications in fields such as filtration, catalysis, and so forth. However, most of these materials have been prepared using complicated template and foaming methods and furthermore in many cases suffer from low electrical and thermal conductivity. Herein, we developed a universal and simple method for the synthesis of dual network reduced graphene oxide-ceramic/metal foam materials from commercial powders directly with graphene oxide as a 2D dispersant following a two-step process (solvothermal and partial sintering). This approach leads to the formation of a three-dimensional and interpenetrating dual network of both reduced graphene oxide and inorganic material. Importantly, this method not only is rather scalable but can also be applied universally for various ceramic materials, such as Al2O3 and TiO2, and even metals such as Al and Cu. Furthermore, the material's porosity can be controlled by varying sintering temperatures and using different sizes of starting materials, ranging from several nanometers to a dozen micrometers. Because of the dual network architecture of both reduced graphene oxide and inorganic components, these materials exhibit multiple functions such as high porosity, improved electrical conductivity, and so forth. These results thus offer a general platform from various commercial inorganic powder materials directly for preparing porous but mechanically stable bulk materials, which are in high demand for catalysis, filtration, conductive ceramic, and porous electrode materials.
机译：无机多孔材料在诸如过滤，催化等领域中发现了许多应用。然而，大多数这些材料已经使用复杂的模板和发泡方法制备，并且在许多情况下，在许多情况下患有低电和导热性。在此，我们开发了一种通用和简单的方法，用于将双网络减少的石墨烯氧化物 - 陶瓷/金属泡沫材料直接用石墨烯氧化物作为2D分散剂在两步方法（溶剂热和部分烧结之后。该方法导致形成氧化石墨烯和无机材料的三维和互穿的双网络。重要的是，该方法不仅相当可扩展，而且还可以普遍适用于各种陶瓷材料，例如Al 2 O 3和TiO 2，甚至是诸如Al和Cu的金属。此外，材料的孔隙率可以通过改变烧结温度并使用不同尺寸的起始材料来控制，从几纳米到十几个微米。由于两种石墨烯氧化物和无机组分的双网络架构，这些材料表现出多种功能，例如高孔隙率，改善的电导率等。因此，这些结果提供了一种来自各种商业无机粉末材料的一般平台，用于制备多孔但机械稳定的散装材料，这对催化作用，过滤，导电陶瓷和多孔电极材料具有很高的需求。

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