钽氧纳米片的机械化学法制备及表征

利用固相化学法在800℃合成了前躯体钽酸钾,新型剪切力机械剥离法对其研磨剥离得到了较大面积的钽氧纳米片。主要讨论了机械剥离过程中不同的研磨剂、研磨频率对钽酸钾剥离的影响,不同的超声时间对合成分散性好、均一稳定的钽氧纳米片溶胶浓度的影响。运用X-射线衍射技术,紫外可见分光光度计,透射电子显微镜以及Zeta电位分析仪等对前躯体化合物钽酸钾及钽氧纳米片结构进行分析和表征,证实了在不同条件下钽氧纳米片二维结构的存在。

Mechanochemical Preparation and Characterization of Tantalum Oxide Nanosheets

Precursor KTaO3 was synthesized via the solid-state chemistry method, and through a novel simple mechanochemical method, it was exfoliated rapidly into a large area of tantalum oxide nanosheets. The effects of different abrasives and grinding frequency on the cleavage of the potassium tantalum were discussed in the mechanical stripping process. Meanwhile, the subsequent different ultrasonic time, which influences the dispersion, homogeneity and stability of tantalum oxide nanosheets solution concentration, were mainly considered. Using X-ray diffraction (XRD), UV-visible spectrophotometer (UV/Vis), transmission electron microscopy (TEM) and Zeta potential analyzer, the structure of the precursor compounds potassium tantalum and the tantalum oxide nanosheets were characterized. Results confirm the existence of the two-dimensional structure of nanosheets in the different conditions.