Research On Microstructure Ade Photocatalysis Activity Of Potassium Titanate One-dimensional Nano-structure By Hydrothermal Method

Potassium titanate is known as an inorganic nonmetallic material because of its well physicochemical property, now more and more researchers pay attention to its preparation and special property. So, there will be a further expand of application on the preparation and structural characteristics of potassium titanate one-dimension nano-structure (PTON).In this paper, PTON was synthesized via hydrothermal method by using TiO₂ and KOH as the starting materials. The affection of reaction temperature, reaction time and KOH solution concentration on the microstructure was investigated, the photocatalysis activity was tested under different conditions.The phase structure of PTON was measured by X-ray diffractometry (XRD), and morphologies of PTON were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that PTON is successfully synthesized by hydrothermal method, and the main phase is K2Ti6O13. Different potassium titanate one-dimension nano-structures could be obtained under different synthetic conditions. The microstructure of one-dimension nano-structured has shown the changing as : nanorodâ†'nanowireâ†'nano-lamellar structureâ†'nanotubeâ†'nanobelt with the rise of temperature. The optimalizing concentration of KOH is 10 M.The XRD and SEM results of dynamic sampling experiment shows that K₂Ti₆O₁₃ can nucleate and grow up rapidly in the hydrothermal reaction system.The degradation of methylene blue chloride by PTON which were prepared by a hydrothermal method under different conditions of was also studied. The results shows that the photocatalysis activity of PTON is much higher than that of TiO₂.