摘要
以Bi(NO)·5HO、KI、K_(2)TiO_(2)(CO_(4))_(2)为原料,通过水热法合成Bi_(4)Ti_(3)O_(12)/BiOI(简记为BTI)复合光催化剂,并对合成的复合催化剂进行X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、固体紫外可见漫反射(UV-vis DRS)表征测试,分析样品的晶体结构、元素组成及光性能等。同时,利用250 W的氙灯模拟可见光照射条件,将催化剂对罗丹明B进行降解实验分析。结果表明:较之单相催化剂Bi_(4)Ti_(3)O_(12)和BiOI,二者复合后形成的异质结对可见光的吸收效果均有显著提升,其中以BTI-2(Bi_(4)Ti_(3)O_(12)与BiOI的摩尔比2∶1)复合催化剂降解效果最佳,降解率可达95.7%。
Bi_(4)Ti_(3)O_(12)/BiOI composite catalyst(abbreviated as BTI) was synthesized by hydrothermal method using Bi(NO)·5HO_(3), KI, K_(2)TiO(C_(2)O_(4))_(2)as raw materials. The synthesized composite photocatalyst was characterized by X-ray powder diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and solid UV-vis diffuse reflectance spectroscopy(UV-vis DRS) for the analysis of crystal structure, elemental composition and optical properties of the samples. At the same time, 250 W xenon lamp was used to simulate the visible light irradiation conditions, and the degradation effect of rhodamine B by the catalysts was analyzed. Compared with the single-phase catalysts Bi_(4)Ti_(3)O_(12)and BiOI, the results showed that the absorption effect of visible light had significantly improved by the heterojunction formed by the two composite catalysts. Among them, composite catalyst BTI-2( molar ratio of Bi_(4)Ti_(3)O_(12)to BiOI 2∶1) had the best degradation effect, and the degradation rate reached 93.7 %.
作者
张丽红
蔡雅晴
ZHANG Li-hong;CAI Ya-qing(Minnan Science and Technology Institute,Quanzhou Fujian 362332,China)
出处
《当代化工》
CAS
2022年第6期1392-1396,共5页
Contemporary Chemical Industry
基金
福建省教育厅中青年教师教育科研项目(项目编号:JAT170878)。
