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Relaxor behavior and photocatalytic properties of BaBi 2 Nb 2 O 9
Author(s) -
Qi Wenzhi,
Wang Yaqiong,
Wu Jiyue,
Hu Zimeng,
Jia Chenglong,
Viola Giuseppe,
Zhang Hongtao,
Yan Haixue
Publication year - 2020
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.16730
Subject(s) - aurivillius , photocatalysis , materials science , rhodamine b , ferroelectricity , charge carrier , reactivity (psychology) , polar , phase (matter) , analytical chemistry (journal) , optoelectronics , chemistry , dielectric , catalysis , biochemistry , chromatography , medicine , alternative medicine , physics , organic chemistry , pathology , astronomy
Lead‐free Aurivillius phase BaBi 2 Nb 2 O 9 powders were prepared by solid‐state reaction. Ferroelectric measurements on BaBi 2 Nb 2 O 9 (BBNO) ceramics at room temperature provided supporting evidence for the existence of polar nanoregions (PNRs) and their reversible response to an external electric field, indicating relaxor behavior. The photocatalytic degradation of Rhodamine B reached 12% after 3 hours irradiation of BBNO powders under simulated solar light. Silver (Ag) nanoparticles were photochemically deposited onto the surface of the BBNO powders and found to act as electron traps, facilitating the separation of photoexcited charge carriers; thus, the photocatalytic performance was significantly improved. The present study is the first examination of the photochemical reactivity of a relaxor ferroelectric within the Aurivillius family with PNRs.