粉煤灰漂珠负载Bi_2WO_6复合材料的制备及光催化性能研究（英文）  

Synthesis of Bi_2WO_6/Fly Ash Cenospheres Composites with Enhanced Photocatalytic Properties

作　　者：张进[1] 崔皓[2] 翟建平[2] 

机构地区：[1]南京晓庄学院生物化工与环境工程学院,南京211171 [2]污染控制与资源化研究国家重点实验室、南京大学环境学院,南京210046

出　　处：《无机化学学报》2014年第12期2857-2862,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51308282);中国博士后科学基金(No.2012M511254);江苏省高校自然科学研究计划(No.12KJD610004)资助项目

摘　　要：以工业固体废弃物粉煤灰漂珠(fly ash cenospheres,FACs)为载体,采用水热法制备了新颖的漂珠负载Bi2WO6复合材料(Bi2WO6/FACs),通过X射线衍射(XRD),扫描电子显微镜(SEM),X-射线光电子能谱(XPS),和紫外-可见漫反射光谱(DRS)技术对其进行了表征。XRD数据显示了正交相Bi2WO6的特征衍射峰。DRS结果证实了引入FACs后Bi2WO6对可见光的吸收增强。在可见光的照射下,以亚甲基蓝溶液的光催化降解评价了Bi2WO6/FACs复合材料的光催化性能。结果表明:Bi2WO6/FACs的光催化性能优于纯Bi2WO6的,其一级反应速率常数(k)为后者的2.4倍。尤其是由于漂珠质轻中空的特性,Bi2WO6/FACS复合光催化剂可长时间漂浮于水面,既能充分吸收光能,又有利于催化剂的回收和重复利用。A fly ash eenospheres supported Bi2WO6 composites （Bi2WO6/FACs） photocatalysts were prepared by a hydrothermal method. The composites were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, X-ray photoelectron spectra （XPS）, and UV-Vis diffused reflectance spectroscopy （DRS） techniques. The XRD patterns exhibited characteristic diffraction peaks of orthorhombic phase of Bi2WO6. The DRS results showed that the visible light absorption of the Bi2WO6/FACs composite is enhanced. The as-prepared material exhibited good photocatalytic activity for the degradation of methylene blue （MB） under visible light irradiation, and the first-order reaction rate constant （k） of 0.012 min-1 for Bi2WO6/FACs composite is higher than 0.004 8 min-1 of pure Bi2WO6. Moreover, the present study provides a useful strategy to design heterogeneous catalysis, in which catalytic materials are supported on from coal-firing power plants. fly ash cenospheres, an industrial solid waste produced

关 键 词：复合材料 Bi2WO6 粉煤灰漂珠 可见光 

分 类 号：O614.532[理学—无机化学] O614.613[理学—化学]