闫晓乐, 李朋伟.超细纳米Fe2O3及其组装结构的可见光催化性能[J].压电与声光,2018,40(3):407-411.YAN Xiaole, LI Pengwei.Visible light Photocatalytic Properties of Ultrafine Nano Fe2O3 and Its Assembly Structure[J].PIEZOELECTRICS AND ACOUSTOOPTICS
超细纳米Fe2O3及其组装结构的可见光催化性能
Visible light Photocatalytic Properties of Ultrafine Nano Fe2O3 and Its Assembly Structure
  
DOI:10.11977/j.issn.1004-2474.2018.03.024
中文关键词:  Fe2O3  水热法  超细纳米颗粒  自组装  可见光催化
英文关键词:Fe2O3  hydrothermal method  ultrafine nanoparticle  self assemble  visible light photocatalyst
基金项目:中国国家自然科学基金资助项目(51205276);山西省高等学校科技创新项目(2016136);山西省研究生教育创新项目(2017SY021和2017BY049)
作者单位
闫晓乐, 李朋伟 (太原理工大学 信息工程学院微纳系统研究中心 新型传感器和智能控制系统教育部重点实验室山西 太原 030024) 
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中文摘要:
      利用水热法成功地制备出超细氧化铁(Fe2O3)纳米颗粒及其再组装纳米饼和纳米环结构。通过X线衍射(XRD)仪、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、氮吸附(BET)和UV Vis分别对样品的结构、形貌、比表面积和光学性能进行了表征,结果表明超细Fe2O3纳米颗粒的平均直径约为5.5 nm,比表面积高达256.2 m2·g-1。通过控制反应时间等实验条件,可将Fe2O3超细纳米颗粒三维定向组装为饼状结构,经腐蚀镂空可进一步演化为纳米环状结构。这些结构表面由超细纳米颗粒相互联结,能够提供大量的活性位点。可见光照射下的罗丹明B光催化降解实验表明,Fe2O3纳米饼状再组装结构具有优异的可见光催化活性,且性能稳定,易回收。这些特性使得Fe2O3超细纳米颗粒及其再组装结构材料在光催化领域具有较大的实用价值。
英文摘要:
      The ultrafine Fe2O3 nanoparticles and their self assembled nano saucers and nano rings were successfully prepared by a simple hydrothermal method. The structure, morphology, specific surface area and optical properties of the samples were characterized by XRD, SEM, TEM, BET and UV Vis. The results showed that the average diameter of ultrafine Fe2O3 nanoparticles was about 5.5 nm and the specific surface area was up to 256.2 m2·g-1. By controlling the reaction time and other experimental conditions, the prepared Fe2O3 nanoparticles can be 3D directionally assembled into a saucer shape structure and further evolved into the nano rings by etching. The surfaces of these structures were interconnected by ultrafine nanoparticles which can provide a large number of active sites for photocatalytic reaction. The photocatalytic degradation of Rhodamine B under visible light irradiation showed that the Fe2O3 nano saucers reassembled structure had the excellent visible photocatalytic activity, stable performance and easy to recovery. These characters make ultrafine Fe2O3 nanoparticles and their reassembled structure materials have great practical value in the field of photocatalysis.
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