Preparation and Characterization of Carbon-doped Mesoporous TiO2 Electrorheological Fluid
DONG Yan
ZHU Yi-hua
KUANG Ji
QIU Zhi-yong
ZHOU Lu-wei
Abstract：The preparation of carbon-doped TiO2 particles via the route of synthesis of mesoporous TiO2 using dodecylamine（DDA）as a template and carbonization at different temperature in flowing N2 is presented．The structures of the carbon-doped TiO2 were investigated by TEM，N2 adsorption－desorption isotherm measurements，XRD and XPS．The TEM photographs of carbon-doped titania show disordered porous particles with size range from 130 to 200 nm．The N2 adsorption－desorption isotherm reveals the existence of mesoporosity in these materials with a type IV isotherm．The XRD patterns indicate that carbon-doped titania particles carbonized both at 673K and 873K are anatase structures，but the crystalline size of the sample carbonized at 673K is smaller than that of the sample carbonized at 873K．The XPS analyses suggest that the carbon mainly distributed on the surface layer of the particle． The anhydrous electrorheological（ER）fluid composed of carbon-doped titania powders dispersed in paraffin liquid shows an intrinsic ER effect．The elctrorheological results show that the carbon-doped TiO2 particles synthesized with DDA/TiO2 mole ratio around 0．05 to 0．10 and carbonized at temperature around 673 K exhibit higher ER activities due to their proper conductivity caused by the carbon on the surface of the particles．
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Publication Date：2001-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 9-13 )