钛酸铋纳米片的合成及其在降解卟啉类分子中的应用

采用湿化学法合成了单晶Bi20TiO32纳米片,通过XRD,TEM,EDS,DRS和BET等手段对合成样品进行了表征.研究发现单晶Bi20TiO32纳米片其可见光吸收性能明显增强.在可见光（λ〉420 nm）照射60 min后对四羧基锌卟啉（初始浓度co=1.0×10-4mol/L）的降解率为96.9%.对卟啉染色的布料进行了模拟脱色处理,结果表明：经过30 min全谱模拟太阳光照射后,经卟啉染色的布料颜色几乎完全褪去,表明单晶Bi20TiO32纳米片对类卟啉染色机体有很好的脱色作用.详细阐述了其脱色的原因和机理.

Synthesis of Bi20TiO32 Nanosheets and Their Application for Porphyrin Molecule Decolorization

Bismuth titanate(Bi20TiO32) nanosheets were prepared via a simple green wet chemical route.The Bi20TiO32 photocatalysts were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),energy dispersive spectrum analysis(EDS),UV-vis diffuse reflectance spectroscopy(DRS) and N2 adsorption-desorption(BET).Inspiringly,Bi20TiO32 nanosheets could enhance the absorption of visible-light.After visible light irradiation for 60 min,about 96.9 % the of four carboxyl zinc porphyrin was decomposed.White cloth,which was droped with the four carboxyl zinc porphyrin,was used to simulated decolorization.The result showed that the cloth stained with four carboxyl zinc porphyrin was illuminated by simulated sunlight and the typical braun color of the four carboxyl zinc porphyrin fad rapidly after 30 min,indicating that the single-phase Bi20TiO32 has good effect in porphyrin bleaching.In our paper,we propose a elaboration of the mechanism about its adsorption and photocatalysis.