Synthesis Of Mesoporous Titanium Dioxide And Research Of Photocatalytic Degradation Of Rhodamine B

Recent years,emiconductor photochemical catalytic technique is studied widely due to its energy efficient and green Initiative.Titanium dioxide?TiO₂?,the most representative,is used widely among all photocatalytic materials due to higher chemical stability,higher photocatalytic efficiency,non-toxic side effects,relatively mature synthesis and reactivity and stability.This research content mainly improves the activity and stability of TiO₂,with design and synthesis of efficient photocatalytic catalyst.We take improvement measures for traditional titanium dioxide photocatalysis which has limitations.First,unlike the traditional synthetic route of TiO₂ nanomaterials,approximate ordered mesoporous TiO₂ microspheres/hollow spheres were obtained using a two-step method,by first preparing the precursor TG,and then controlling the size of mesoporous TiO₂ microspheres/hollow spheres by a hydrothermal method.Second,with silver nitrate and thiourea as dopant,to preparing a series of monodisperse different ions doped mesoporous TiO₂ microspheres using solvent thermal method.Third,we prepared the nanometer TiO₂ and graphene composite to use solvent method.The products were characterized by XRD,SEM,TEM,FTIR,XPS,and N2 adsorption.Meanwhile,the mesoporous TiO₂ hollow core ball and with silver and sulfur doped mesoporous TiO₂ microspheres and nano TiO₂ / graphene composites with regard to different concentrations of photocatalytic degradation of rhodamine B.Rhodamine B as a kind of organic dyes,coloring heavy and refractory,which be studied the technology of the photocatalytic containing organic wastewater treatment has a general significance.The experimental results show that,compared with the pure TiO₂ photocatalytic degradation of rhodamine B,mesoporous TiO₂ hollow core ball and silver,sulfur doped mesoporous TiO₂ microspheres and nano TiO₂ / graphene composites have a lot to improve photocatalytic activity for rhodamine B,degradation rate is as high as above 98%.