论文部分内容阅读
以Bi(NO_3)_3、Ti(OC_4H_9)_4、In(NO_3)_3和聚乙烯吡咯烷酮(PVP-K30)为原料,采用静电纺丝法和沉淀法相结合,成功制备了Bi掺杂In_2TiO_5(Bi-In_2TiO_5)纳米带.利用X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线能量色散谱(EDS)、紫外-可见漫反射光谱(UV-vis DRS)和氮气吸附-脱附等温线(BET)等技术对样品进行表征.结果表明,Bi的掺杂未引入新的杂相,样品均为正交晶系结构,掺杂前后样品的形貌未发生明显变化.适量的Bi掺杂,在In2Ti O5晶格中形成杂质能级,降低了In_2TiO_5的带隙能.当掺杂量为2%时,制备的Bi-In_2TiO_5纳米带的光催化活性最高.在氙灯(150 W)辐照下,150 min,对罗丹明B的降解率达95.8%,且该催化剂对氟喹诺酮类抗生素左氧氟沙星(LEV)也表现出优良的光催化降解性能.
Bi-doped In_2TiO_5 (Bi-Bi 3 O 3) films were successfully prepared by electrospinning and precipitation methods using Bi (NO_3) _3, Ti (OC_4H_9) _4, In (NO_3) _3 and PVP-K30 as raw materials. In_2TiO_5) nanobelts were synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), UV-vis DRS and nitrogen adsorption-desorption isotherms BET) were used to characterize the samples.The results showed that the new heterophase was not introduced by Bi doping, and the samples were all orthorhombic, the morphologies of the samples before and after doping did not change obviously.The appropriate amount of Bi doping, The bandgap energy of In_2TiO_5 was reduced in the In 2 Ti 5 O 5 lattice, and the Bi-In 2 Ti 5 O 5 nanobelts exhibited the highest photocatalytic activity when the doping amount was 2%. Under the irradiation of xenon lamp (150 W) , 150 min, the degradation rate of rhodamine B was 95.8%, and the catalyst showed good photocatalytic degradation to levofloxacin (LEV), a fluoroquinolone antibiotic.