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Microwave-assisted synthesis of anatase TiO_2 nanorods with mesopores

机译：介孔的微波辅助合成锐钛矿型TiO_2纳米棒

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摘要

Pure anatase TiO_2 nanorods with mesopores were synthesized by a simple and low cost microwave-assisted method when tri-block copolymer was used as a structure stabilization agent and TiCl_4 as metal precursor. TEM investigation showed that larger nanorods were assembled by pearl-necklace-shaped nanorods following an oriented attachment mechanism in a specific direction. A proposed hypothetical scheme showed that the formation of lyotropic titania liquid crystal (TLC) serves a key role in the stabilization of nanorods, and the mesopores on nanorods are derived from the vacancy of inter-particles of nanorods and regions lacking inorganic precursors in the TLC structure. Control experiments showed that microwave treatment plays a key role in the maintenance of original morphologies and mesostructures free from destruction even under high temperature calcinations.
机译：以三嵌段共聚物为结构稳定剂，以TiCl_4为金属前驱体，采用简单，低成本的微波辅助方法合成了具有中孔的纯锐钛矿型TiO_2纳米棒。 TEM研究表明，较大的纳米棒由珍珠项链状的纳米棒按照特定方向的定向附着机制组装而成。提出的假设方案表明，溶致二氧化钛液晶（TLC）的形成在稳定纳米棒中起关键作用，并且纳米棒上的中孔是由纳米棒的粒子间空位和TLC中缺少无机前体的区域产生的结构体。对照实验表明，即使在高温煅烧下，微波处理在维持原始形态和介观结构不受破坏的过程中也起着关键作用。

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