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On Structure, Optical Properties and Photodegradated Ability of Aurivillius‐Type Bi 3 TiNbO 9 Nanoparticles
Author(s) -
Xu Lei,
Wan Yingpeng,
Xie Hongde,
Huang Yanlin,
Qiao Xuebin,
Qin Lin,
Seo Hyo Jin
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14423
Subject(s) - aurivillius , materials science , photocatalysis , band gap , nanoparticle , visible spectrum , photodegradation , crystallite , scanning electron microscope , analytical chemistry (journal) , dopant , doping , nanocrystalline material , nanotechnology , optoelectronics , chemistry , organic chemistry , dielectric , metallurgy , composite material , ferroelectricity , catalysis
Bi 3 TiNbO 9 nanoparticles with an acceptor dopant of Ni 2+ ion were prepared by the conventional Pechini sol–gel synthesis. The X‐ray polycrystalline diffraction measurements (XRD) and the Rietveld refinements of Bi 3 TiNbO 9 samples were completed. The surface property of Bi 3 TiNbO 9 nanoparticles was investigated by transmission electron microscope, scanning electron microscope), and N 2 adsorption–desorption isotherms. Bi 3 TiNbO 9 nanoparticles showed an optical band gap with energy of 3.1 eV in the UV region. While the Ni 2+ ‐doping could greatly reduce the band energy of Bi 3 TiNbO 9 : x Ni 2+ nanoparticles to 2.79 eV ( x = 0.05) and 2.61 eV ( x = 0.1). This indicates that the Ni‐doped samples could be excited by UV–visible light. The photocatalytic abilities were tested by the photodegradation on methylene blue solution (MB) and phenol solutions excited by visible light. Accordingly, the photocatalytic activity was improved by the Ni‐doping in B‐sites in this Aurivillius‐type structure. The results concluded that Bi 3 TiNbO 9 :Ni 2+ would be a possible candidate as a visible light‐driven photocatalyst. The effective photocatalysis was discussed on the structure characteristic and experiment such as polarized Aurivillius (Bi 2 O 2 ) 2+ layers, luminescence, and decay lifetimes, etc.