摘要
采用共沉淀结合固体粒子混合法,在TiO2中引入三氧化二铝包膜磁性核,通过对催化剂的XRD,TEM和红外光谱分析,发现磁性核具有γ-Fe2O3的晶相,且被三氧化二铝及二氧化钛包裹,形成复合型磁载光催化剂.同时对影响磁载光催化剂氧化直接耐酸大红4BS染料废水的因素:初始pH值(5.3—5.7)、光强(12.35—18.455μW·cm-2)和TiO2浓度(0.45—1.45mg·l-1)进行研究,通过建立响应曲面模型可得到最佳的初始pH值、光强和磁载光催化剂浓度分别为5.45,19.49×102μW·cm-2和0.86mg·l-1,脱色率达到92.4%.
This article used the co-precipitation union solids mixing method, which introduced the alumina package of membranes magnetic nucleus in TiO2 .The self-made photocatalyst were characterized by means of XRD,TEM and infrared spectrum analysis respectively, results showed that the magnetic nucleus has the γ-Fe2O3 crystal and is also parceled by the alumina and the titanium dioxide and forms the compound magnetic photocatalyst.Meanwhile,the influencing factors of the magnetic photocatalyst oxidizing 4BS dye waste water were studied,including the initial pH,the light intensity and the concentrations of TiO2,The best condition was determined through the established response surface method ：initial pH is 5.45; the light intensity is 19.49×10^2μW·cm^-2; the concentrations of the magnetic photocatalyst is 0.86mg·l^-1, thus the decolorization rate also achieves maximum rate（92.4%）.
出处
《环境化学》
CAS
CSCD
北大核心
2008年第3期283-287,共5页
Environmental Chemistry
关键词
磁载光催化
染料
脱色
响应面模型
magnetic photocatalyst,dye,decolorization,response surface method
