Preparation and characterization of novel yellow pigments: hollow TiO2 spheres doped with cerium
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Ce-doped TiO2 hollow yellow pigment particles were synthesized by coupling template-directed method with Pechini sol–gel process. The effects of water content, ethanol/acetonitrile volume ratio and tetrabutyl orthotitanate concentration, on the fabrication of PS@TiO2 composite particles (the key intermediate product) were investigated and the final pigments were characterized in detail by X-ray diffraction, transmission electron microscopy, scanning electron microscope, X-ray photoelectron spectroscopy, and UV–vis diffuse reflection. The results show that the optimal water content and ethanol/acetonitrile volume ratio are 0.09 mol dm−3 and 3:1, respectively, for the construction of neat PS@TiO2 core–shell structure without secondary titania particles, and that the damage of hollow spheres can be avoided by increasing the shell thickness, and that the prepared hollow spheres were well-crystallised with anatase phase TiO2 and cubic CeO2. Owing to the intrinsic yellow color and lower density, the as-prepared hollow pigments can be expected to be used for color electronic paper display.
KeywordsCeO2 Hollow Sphere Shell Particle Titania Coating Hollow Particle
This work was supported by the National Natural Science Foundation of China (No. 20905011, 21010102071 and 21075015), the National Basic Research Program of China (2007CB936300) and the Natural Science Foundation of Jiangsu (No. BK2010396, BK2009293) and the Construction and Management Laboratory program of Southeast University (2010-L017) and the Open Research Fund of State Key Laboratory of Bioelectronics, Southeast University. This work was also supported by the Southeast University Creative Foundation (3207040501) and Chemical Research Creative Platform for Graduate.
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