超声振荡制备纳米α-Fe_2O_3及其光催化脱色性能研究  

Fabrication and Photocatalytic Performance of α-Fe_2O_3 Prepared Under the Ultrasonic Vibration

作　　者：贺进进[1,2] 钟俊波[1,2] 李建章[1,2] 肖正华[1,2] 曾俊[1,2] 

机构地区：[1]绿色催化四川省高校重点实验室,四川自贡643000 [2]四川理工学院化学与制药工程学院,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2013年第1期9-12,共4页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：四川理工学院研究生创新基金项目(Y201216);自贡市科技局基金项目(2012X07);四川省教育厅基金项目(11ZA127)

摘　　要：采用并流沉淀法并在超声辅助下制备了纳米α-Fe2O3,以甲基橙为模拟污染物对α-Fe2O3的光催化脱色性能进行考察,并用比表面(BET)、X-射线衍射(XRD)和扫描电镜(SEM)对所制备的纳米α-Fe2O3进行了表征。结果表明,超声震荡对纳米α-Fe2O3的比表面参数、形貌、晶粒大小和光生电子-空穴的分离效应能产生显著的影响,从而使其光催化性能得到了显著提高。在α-Fe2O3中起催化作用的主要是空穴,超声制备α-Fe2O3的光催化活性是无超声制备α-Fe2O3的1.5倍。Nano-structured α-Fe2O3 is prepared by a parallel flow method under the ultrasonic vibration. The photocatalytic performanceof α-Fe2O3 is investigated by utilizing photocatalytic deeolorization of methyl orange as model organic pollutant. α-Fe2O3 prepared is characterized by BET, XRD and SEM. The results show that ultrasonic vibration can influence greatly the specific surface parameters, SEM image, particle size and the photoinduced charge separation rate, thus leading to better photocatalytie performance. Hole plays main role in α-Fe2O3 photocatalysis. The photocatalytic performance of α-Fe2O3 prepared by ultrasonic vibration is 1.5 times of that of α-Fe2O3 prepared without ultrasonic vibration.

关 键 词：Α-FE2O3 超声 并流沉淀法 光催化性能 

分 类 号：O64[理学—物理化学]