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首页> 外文期刊>Chemistry: A European journal >Stabilization of Titanium Dioxide Nanoparticles at the Surface of Carbon Nanomaterials Promoted by Microwave Heating
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Stabilization of Titanium Dioxide Nanoparticles at the Surface of Carbon Nanomaterials Promoted by Microwave Heating

机译：微波加热促进碳纳米材料表面二氧化钛纳米粒子的稳定性

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摘要

TiO2 is frequently combined with carbon materials, such as reduced graphene oxide (RGO), to produce composites with improved properties, for example for photocatalytic applications. It is shown that heating conditions significantly affect the interface and photocatalytic properties of TiO2@C, and that microwave irradiation can be advantageous for the synthesis of carbon-based materials. Composites of TiO2 with RGO or amorphous carbon were prepared from reaction of titanium isopropoxide with benzyl alcohol. During the synthesis of the TiO2 nanoparticles, the carbon is involved in reactions that lead to the covalent attachment of the oxide, the extent of which depends on the carbon characteristics, heating rate, and mechanism. TiO2 is more efficiently stabilized at the surface of RGO than amorphous carbon. Rapid heating of the reaction mixture results in a stronger coupling between the nanoparticles and carbon, more uniform coatings, and smaller particles with narrower size distributions. The more efficient attachment of the oxide leads to better photocatalytic performance.
机译：TiO2通常与碳材料（例如还原的氧化石墨烯（RGO））结合使用，以生产具有改进性能的复合材料，例如用于光催化应用。结果表明，加热条件显着影响TiO2 @ C的界面和光催化性能，并且微波辐射对于合成碳基材料可能是有利的。 TiO2与RGO或无定形碳的复合物是由异丙醇钛与苯甲醇反应制得的。在TiO2纳米颗粒的合成过程中，碳参与了导致氧化物共价连接的反应，其程度取决于碳的特性，加热速率和机理。 TiO2比无定形碳更有效地稳定在RGO的表面。反应混合物的快速加热导致纳米颗粒与碳之间的偶联更强，涂层更均匀，尺寸分布更窄的颗粒更小。氧化物的更有效附着导致更好的光催化性能。

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