The Research Of Composition Design And Photocatalytic Properties Of The TiO₂and C/TiO₂nanomaterials

TiO₂based photocatalysts have been one of the most active topics inheterogeneous catalysis due to their great photocatalytic abilities, avirulence andharmlessness. Carbon nanomaterials with special electronic, mechanical, optical andchemical characteristics have attracted great interest, both from a fundamental point ofview and for future applications. In this dissertation, we focus on the research ofcomposition design and photocatalytic properties of the TiO₂and C/TiO₂nanomaterials.The main contents are as follows:（1） Nanoporous TiO₂nanospheres with excellent visible light photocatalyticabilities and narrow pore size （11±1nm） distribution can be obtained via a rapid vaporassisted hydrolysis technique.（2） High quality carbon nanodots （C-dots） with high purity were synthesizedthrough a mild, one-step electrochemical approach, without the assistance of anychemicals but only pure water presented. In addition, a novel photocatalyst （TiO₂/C-dots）was obtained by combining C-dots with TiO₂through an easy hydrothermal method.Remarkably, TiO₂/C-dots exhibited an excellent visible-light photocatalytic activity.（3） Carbon-TiO₂nanohybrids （named as CTs） have been successfully prepared viaa mild, one-step hydrothermal approach in the presence of glucose. CTs exhibit anefficient environmental application such as photodegradation of toxic organic（rhodamine B, benzene） and inorganic （K2Cr2O7） pollutant.（4） C/TiO₂nanohybrids co-doped by N were obtained by one step reaction andexhibited excellent photocatalytic performance.