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Synthesis of Hollow BiVO 4 /Ag Composite Microspheres and Their Photocatalytic and Surface‐Enhanced Raman Scattering Properties
Author(s) -
Chen Limiao,
Yu Yifan,
Wu Min,
Huang Jianhan,
Liu Younian,
Liu Xiaohe,
Qiu Guanzhou
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402434
Subject(s) - photocatalysis , composite number , chemistry , raman scattering , raman spectroscopy , scanning electron microscope , chemical engineering , transmission electron microscopy , nanotechnology , rhodamine 6g , rhodamine b , nanoparticle , materials science , catalysis , composite material , optics , organic chemistry , physics , molecule , engineering
Hollow BiVO 4 microspheres are prepared in the presence of ethylenediaminetetraacetic acid (EDTA) through a hydrothermal method, and used as a template for the fabrication of Ag‐nanoparticle‐decorated BiVO 4 (BiVO 4 /Ag) composite microspheres. The morphology and structure are characterized by transmission electron microscopy and scanning electron microscopy. It is found that EDTA plays an important role in the formation of the hollow microspheres, and the possible formation mechanism is discussed. UV/visible spectrometry analysis shows that the BiVO 4 /Ag composite microspheres exhibit a distinct surface plasmon absorption band compared with pure BiVO 4 microspheres. The photocatalytic activities of the BiVO 4 /Ag composite microspheres are examined by studying the degradation of rhodamine 6G (R6G) solutions under visible‐light irradiation (>400 nm). The results show clearly that the BiVO 4 /Ag composite microspheres possess a much higher photocatalytic activity than pure BiVO 4 microspheres and P25. In addition, Raman analyses show that the BiVO 4 /Ag composite microspheres exhibit an excellent surface‐enhanced Raman scattering (SERS) performance.