能源化学(英文) ›› 2015, Vol. 21 ›› Issue (2): 171-177.DOI: 10.1016/S2095-4956(15)60297-2

• ARTICLES • 上一篇    下一篇

Morphology dependent photocatalytic activity of WO3 nanostructures

Mousa Farhadiana, Parvaneh Sangpoura, Ghader Hosseinzadehb   

  1. a. Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Karaj, P.O. Box 31787-316, Iran;
    b. Young Researchers and Elite Club, West Tehran Branch, Islamic Azad University, Tehran, P.O. Box 19585/936, Iran
  • 收稿日期:2014-09-08 修回日期:2014-12-03 出版日期:2015-03-23 发布日期:2015-03-23
  • 通讯作者: Parvaneh Sangpour

Morphology dependent photocatalytic activity of WO3 nanostructures

Mousa Farhadiana, Parvaneh Sangpoura, Ghader Hosseinzadehb   

  1. a. Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Karaj, P.O. Box 31787-316, Iran;
    b. Young Researchers and Elite Club, West Tehran Branch, Islamic Azad University, Tehran, P.O. Box 19585/936, Iran
  • Received:2014-09-08 Revised:2014-12-03 Online:2015-03-23 Published:2015-03-23
  • Contact: Parvaneh Sangpour

摘要: The shape of nanostructure has important effects on their properties, therefore in this study, we have prepared and characterized three different morphologies of WO3 nanostructures i.e. nanorod, nanosphere and nanoplate for surveying shape effect on their photocatalytic properties toward degradation of Rhodamine B (RhB) dye. Obtained results show that nanoplate WO3 in comparison with others has the best photocatalytic activity. According to SEM, and photocatalytic degradation results, the reason for this behavior is the sharp edges and corners of WO3 nanoplates. Because of their low coordination number, atoms located in the edges and corners of the WO3 nanoplates have more activity, adsorb more RhB and therefore give more photocatalytic activity to the WO3 nanoplates. Using of different scavengers showed that hydroxyl radicals are mainly responsible for photocatalytic activity of WO3 nanoplates and nanospheres but for WO3 nanorods, superoxide radicals are the main photocatalytic degradation agents.

关键词: photocatalyst, tungsten trioxide, morphology dependent, nanostructure

Abstract: The shape of nanostructure has important effects on their properties, therefore in this study, we have prepared and characterized three different morphologies of WO3 nanostructures i.e. nanorod, nanosphere and nanoplate for surveying shape effect on their photocatalytic properties toward degradation of Rhodamine B (RhB) dye. Obtained results show that nanoplate WO3 in comparison with others has the best photocatalytic activity. According to SEM, and photocatalytic degradation results, the reason for this behavior is the sharp edges and corners of WO3 nanoplates. Because of their low coordination number, atoms located in the edges and corners of the WO3 nanoplates have more activity, adsorb more RhB and therefore give more photocatalytic activity to the WO3 nanoplates. Using of different scavengers showed that hydroxyl radicals are mainly responsible for photocatalytic activity of WO3 nanoplates and nanospheres but for WO3 nanorods, superoxide radicals are the main photocatalytic degradation agents.

Key words: photocatalyst, tungsten trioxide, morphology dependent, nanostructure