论文部分内容阅读
Three types of Ti O2 nanostructures were synthesized via a facile hydrolysis method at195 °C. Effects of the preparation method and doping with N and F on the crystal structure and photocatalytic performance of Ti O2 were investigated. The nanomaterials were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller porosimetry, ultraviolet–visible diffuse reflectance spectroscopy and fluorescent emission spectra. Their photo-catalytic activity was examined by the photodegradation of methylene blue in aqueous solution under both ultra-violet and visible light irradiation. The results show that nitrogen and fluorine co-doped anatase Ti O2 had the characteristics of a smaller crystalline size, broader light absorption spectrum and lower charge recombination than pure Ti O2. Most importantly, more efficient photocatalytic activity under both ultra-violet and visible light was observed. The obtained N–F-Ti O2 nanomaterial shows considerable potential for water treatment under sunlight irradiation.
Three types of Ti O2 nanostructures were synthesized via a facile hydrolysis method at 195 ° C. Effects of the preparation method and doping with N and F on the crystal structure and photocatalytic performance of Ti O2 were investigated. The nanomaterials were characterized by X-ray diffraction , transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller porosimetry, ultraviolet-visible diffuse reflectance spectroscopy and fluorescent emission spectra. Their photo-catalytic activity was examined by the photodegradation of methylene blue in aqueous solution under both ultra- violet and visible light irradiation. The results show that nitrogen and fluorine co-doped anatase Ti O2 had the characteristics of a smaller crystalline size, broader light absorption spectrum and lower charge recombination than pure Ti O2. Most importantly, more efficient photocatalytic activity under both ultra -violet and visible light was observed. The obtained N-F-Ti O2 nano material shows considerable potential for water treatment under sunlight irradiation.