摘要
采用炭吸附共沉淀法制备了氧化铁(Fe_2O_3)纳米粉体,通过热重分析仪(TG-DTA)、X射线衍射仪(XRD)、紫外可见分光光度计(UV-Vis)和透射电镜(TEM)等手段对催化剂的热稳定性、物相结构、吸光性能、形貌进行表征;以甲基橙(MO)为目标降解物,镝灯为可见光源,研究了Fe_2O_3纳米粉体的光催化性能。结果表明,炭吸附共沉淀法制得的Fe_2O_3粉体粒径小、分布均匀、团聚较少;Fe_2O_3的吸收波长发生红移且在紫外光、可见光区域的吸收能力增强。光催化降解甲基橙结果显示,炭吸附共沉淀法制得的Fe_2O_3粉体在60 min内降解率达到74%,是沉淀法制备的Fe_2O_3粉体降解率的2.2倍。
Fe2O3 nanoparticles was synthesized by carbon adsorption co-precipitation method. The thermal stability,phase structure,property of light absorption and morphology of the catalyst were characterized by thermogravimetric analyzer（TG-DTA）,X-ray diffraction（XRD）,ultraviolet visible spectrophotometer（UV-Vis） and transmission electron microscopy（TEM）,respectively. And the visible photocatalytic activity of as-prepared samples for the methyl orange（MO） photodegradation were investigated systematically. As a result,the Fe2O3 nanoparticles were obtained with less agglomeration,small particle size and uniform distribution due to the addition of carbon black. The absorption wavelength of Fe2O3 shifts toward the long wavelength and the absorption capacity was enhanced in the ultraviolet and visible regions. The photodegradation of methyl orange results show that the degradation rate of Fe2O3 powder prepared by carbon adsorption co-precipitation method was 74% in 60 min,which is 2. 2 times of samples synthesized by precipitation method.
作者
李金星
郭贵宝
刘金彦
LI Jin-xing;GUO Gui-bao;LIU Jin-yan(School of Chemistry and Chemical Engineering,Inner Mongolia University of Science ＆ Technology,Baotou 014 0 1 0,China)
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2018年第5期972-977,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(21463016)
关键词
氧化铁
炭吸附
可见光
光催化
Fe2O3
carbon adsorption
visible-light
photocatalysis
