GO-Bi2 WO6复合材料光催化降解污水研究

摘要

利用氧化石墨烯（GO）的高比表面积和优良的导电性使其与纳米钨酸铋复合，提高纳米钨酸铋的光催化性能，是目前光催化研究领域的热点及重点之一。采用静电纺丝技术制取钨酸铋纳米纤维，之后用水热法合成 GO 复合钨酸铋高效可见光光催化剂，？用 XRD、TEM、紫外可见光分析等多种表征手段对所制备材料的晶体结构、组成成分、表面形貌以及微结构等进行研究分析。结果显示：跟单一成分的的的 Bi2 WO6相比，GO-Bi2 WO6复合光催化的光催化性能更加优异。GO-Bi2 WO6（0．5wt％）具有的高光催化活性，可使其光催化速率常数达到5．0×10－2／min，是单一成分的 Bi2 WO6的1．7倍。%The application of visible light catalyst in curbing environmental pollution control has been widespread concern.Nano tungsten bismuth (Bi2 WO6 )with visible light catalytic activity is a new photo-catalysts.The department of bismuth oxide has high visible light catalytic activity.To make the high specific surface area and good electrical conductivity of “GO ” with the nanometer tungsten acid bismuth compound to improve the photocatalytic performance of nanometer tungsten acid bismuth is one of current hot spots and focus in the field of photo-catalysis.Based on the electrostatic spinning technology for making tungsten acid bismuth nano fiber,we have got synthesis method of composite tungsten acid bismuth “GO”after hot water efficient visible light catalyst.It will be bright with XRD,TEM,ultraviolet visible light analysis of the various characterization methods,such as preparation material of crystal structure, composition. The paper tells about the surface morphology and microstructure analysis.Our results show that,when it is compared with pure Bi2 WO6 ,GO-Bi2 WO6 composite photocatalytic,we will get higher photocatalytic performance.Among them,the GO-Bi2 WO6 (0.5wt%)is with the highest photocatalytic activity.It’s rate constant reaches at 5.0 ×10 -2 /min,which is 1.7 times of pure Bi2 WO6 .