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单层氧化钛纳米页(titania nanosheets)是一种厚度仅为0.7 nm的新型二维纳米材料,具有许多不同于块体氧化钛的优异性质,如:高各向异性、单晶性质、胶体和聚电解质特性、大比表面积、高表面能和量子尺寸效应等。在光电转换、磁光效应、高介电常数器件、电化学能量储存、湿敏传感器、自清洁和光催化等领域极具应用前景。本文首先总结了氧化钛纳米页的基本性能,如:光吸收性能、光致发光性能、光电化学性能、光诱导亲水性能和晶相转变温度差异等,概述了氧化钛纳米页的制备及组装方法,接着分别以薄膜片、纳米管、中空微球、超薄多层复合薄膜为代表,介绍了氧化钛纳米页组装得到的新型材料及其特点,然后介绍了氧化钛纳米页的掺杂改性,从拓宽光吸收带边、提高电子迁移速率和提高磁光效应三个角度,归纳总结了离子掺杂与氧化钛纳米页性能之间的关系,最后对氧化钛纳米页未来的研究发展趋势提出了展望。
Titania nanosheets, a new two-dimensional nanomaterial with a thickness of only 0.7 nm, have many different properties from bulk titanium oxides such as high anisotropy, single crystal properties, colloids and Polyelectrolyte properties, large specific surface area, high surface energy and quantum size effect. In the photoelectric conversion, magneto-optical effect, high dielectric constant devices, electrochemical energy storage, humidity sensors, self-cleaning and photocatalysis applications. In this paper, the basic properties of titanium dioxide nano-sheets such as light absorption, photoluminescence, photoelectrochemical properties, photoinduced hydrophilicity and the difference of crystal phase transition temperature are summarized. The preparation and assembly of titanium dioxide nanosheet Then, the new materials and their characteristics of titanium dioxide nanosheet assembly were introduced respectively by means of thin films, nanotubes, hollow microspheres and ultrathin multilayer composite films, and then the doping of the titanium dioxide nano-sheets The relationship between ionic doping and the properties of titanium dioxide nano-sheets is summarized and summarized from the aspects of broadening the light absorption band edge, increasing the electron transfer rate and improving the magneto-optical effect. Finally, the future research trends of titanium dioxide nano-sheets Put forward the prospect.