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Key Words:TiO2 nanoparticles;Diffractometers - Electric fields - Electrorheological fluids - Fourier transform infrared spectroscopy - High resolution transmission electron microscopy - Morphology - Nanofluidics - Nanoparticles - Rheology - Scanning electron microscopy - Shear stress - Spheres - Titanium dioxide - X ray diffraction
Abstract:In this paper, we prepared eggshell-like TiO<inf>2</inf> hollow sphere nanoparticles by one-step template-free method, and studied its electrorheological (ER) properties at different electric field strengths. The microstructure, composition, and morphology of eggshell-like TiO<inf>2</inf> hollow sphere was characterized by SEM (scanning electron microscopy), TEM (transmission electron microscopy), XRD (X-ray powder diffractometer), FI-IR (Fourier transform infrared spectroscopy), BET (Brunner Emmett Teller) measurements. XRD and FT-IR confirm the existence of pure anatase-type titanium oxide. BET measurement verifys the hollow structure belonging to eggshell-like TiO<inf>2</inf> hollow nanoparticles. With the help of SEM and TEM techniques, by changing the reaction time, we learned about the approximate formation process of eggshell - like TiO<inf>2</inf> hollow nanoparticles and observed the hollow structure. After a series of characterization methods, we have a further and deeper understanding of eggshell-like TiO<inf>2</inf> hollow ball nanoparticles. Thus, we found that the one-step templateless method we used to prepare eggshell like TiO<inf>2</inf> hollow spherical nanoparticles is simple and easy to operate, with a short reaction cycle and non-toxic and harmless. And the electrorheological properties, including the variation of shear stress, shear viscosity, as well as electrorheological efficiency of eggshell-like TiO<inf>2</inf> hollow sphere-based electrorheological fluid with shear rate under different electric field were studied by using high-speed rotary rheometer. At the same time, the obtained eggshell-like TiO<inf>2</inf> hollow spherical nanoparticles have good electrorheological properties and are a kind of electrorheological materials with promising application prospects.<br/> © 2020
Volume:601
Issue:wu
Translation or Not:no