Photocatalytic activity of enlarged microrods of α-Bi2O3 produced using ethylenediamine-solvent. Issue 10 (1st August 2016)

• Record Type: Journal Article
• Authors: Hernández-Gordillo, Agileo; Medina, Juan C.; Bizarro, Monserrat; Zanella, Rodolfo; Monroy, B.M.; Rodil, Sandra E.
• Is Part Of: Ceramics international. Volume 42:Issue 10(2016)
• Page Start: 11866
• Page End: 11875
• Publication Date: 2016-08-01
• Subjects: Microrods -- α-Bi2O3 phase -- Ethylenediamine-solvent -- Indigo carmine dye; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.04.109
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Microrods of α-Bi2 O3 were prepared by a simple chemical precipitation method, replacing the hydroxyl (OH − ) ions by the ethylenediamine-solvent as both a precipitating and capping agent; it can also function as a morphological template. The influence of the ethylenediamine solvent concentration on the crystalline structure, optical properties, morphology, and photocatalytic activity was investigated. The prepared samples were characterized by X-ray diffraction, diffuse reflectance spectroscopy, scanning electron microscopy, Fourier transformed IR analysis, thermal analysis and photoluminescence spectroscopy. The adsorption capacity in dark conditions and the photocatalytic activity under UV-light were studied as a function of the photocatalyst load by using indigo carmine dye solution. The highest photoactivity was observed for the non-agglomerated Bi2 O3 microrods obtained with ethylenediamine-solvent at 40 vol%. The photocatalytic mechanism was discussed as a function of surface oxygen vacancies generated along to the microrod surface caused by the ethylenediamine-solvent.