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General strategy for a large-scale fabric with branched nanofiber-nanorod hierarchical heterostructure: Controllable synthesis and applications

机译:具有分支纳米纤维-纳诺德分层异质结构的大规模织物的一般策略:可控制的合成和应用

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摘要

The preparation and characterization of a branched nanofiber- nanorod hierarchical heterostructure fabric (TiO_2/NiO, TiO_2/ZnO, and TiO_2/ SnO_2) are described. The nanomaterial was synthesized on a large scale by an inexpensive, generalizable, facile, and controllable approach by combining the electrospinning technique with a hydrothermal method. The controllable formation process and factors (assistance by hexamethylenetetramine and metal oxide nuclei) influencing the morphology of the branched hierarchical heterostructure are discussed. In addition, photocurrent and photocata- lytic studies suggest that the branched hierarchical heterostructure fabric shows higher mobility of charge carriers and enhanced photocatalytic activity relative to a bare TiO_2 nanofibrous mat and other heterostructures under irradiation by light. This work demonstrates the possibility of growing branched heterostructure fabrics of various uniform, one-dimensional, functional metal oxide nanorods on a TiO_2 nanofibrous mat, which has a tunable morphology by changing the precursor. The study may open a new channel for building hierarchical heterostructure device fabrics with optical and catalytic properties, and allow the realization of a new class of nano-heterostructure devices.
机译:描述了支化纳米纤维-纳米棒分层异质结构织物(TiO_2 / NiO,TiO_2 / ZnO和TiO_2 / SnO_2)的制备和表征。通过将电纺丝技术与水热方法相结合,通过廉价,可通用,容易且可控制的方法大规模合成了纳米材料。讨论了可控制的形成过程和影响支化分层异质结构形态的因素(六亚甲基四胺和金属氧化物核的辅助作用)。此外,光电流和光催化研究表明,相对于裸露的TiO_2纳米纤维垫和其他受光照射的异质结构,分支的分层异质结构织物显示出更高的电荷载流子迁移率和增强的光催化活性。这项工作证明了在TiO_2纳米纤维垫上生长各种均匀,一维,功能性金属氧化物纳米棒的支化异质结构织物的可能性,该TiO_2纳米垫通过改变前体而具有可调整的形态。该研究可能会为构建具有光学和催化特性的分层异质结构器件结构开辟新的渠道,并允许实现一类新型的纳米异质结构器件。

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