Structure and photocatalytic properties of Nb-doped Bi12TiO20 prepared by the oxidant peroxide method (OPM)

Author(s)

Nogueira, Andre E. ^[1] ; Lima, Alan R. F. ^[1] ; Longo, Elson ^[2] ; Leite, Edson R. ^[1] ; Camargo, Emerson R. ^[1]

Affiliation

^[1] UFSCar Univ Fed Sao Carlos, Dept Quim, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[2] UNESP Univ Estadual Paulista, Inst Quim Araraquara, BR-14801907 Araraquara, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF NANOPARTICLE RESEARCH; v. 16, n. 12 DEC 2014.
• Web of Science Citations: 3

Abstract

Pure (Bi12TiO20) and niobium-doped (Bi12Ti1-xNbxO20, with ``x'' up to 0.15) bismuth titanates were prepared by the oxidant peroxide method (OPM) and used to photodegradate rhodamine b (RhB) under UV and visible radiation. Rietveld refinements showed samples consisting mainly of sillenite structure with small amounts of a perovskite secondary phase in the Nb-doped materials. These bismuth-based catalysts exhibited superior performance than the commercial TiO2, with band gaps ranging from 2.53 of pure Bi12TiO20 to 2.73 eV depending on the amount of niobium added, which seems to be responsible for the improved photoactivity of the doped catalysts under UV radiation. (AU)

• FAPESP's process: 12/07067-0 - Photocatalyst based in bismuth titanate synthesized by the oxidant peroxo method (OPM)
• Grantee: Emerson Rodrigues de Camargo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/20129-0 - Photocatalytic properties of bismuth titanate synthesized by the oxidant peroxide method (OPM)
• Grantee: André Esteves Nogueira
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC