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One‐Step Facile Synthesis and Luminescence Properties of Eu 3+ ‐Doped Silica Nanowires
Author(s) -
Chen Jie,
Sheng Ye,
Zhou Xiuqing,
Zhang Hui,
Shi Zhan,
Zou Haifeng
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500738
Subject(s) - luminescence , nanowire , scanning electron microscope , doping , chemistry , transmission electron microscopy , analytical chemistry (journal) , spectroscopy , fourier transform infrared spectroscopy , quenching (fluorescence) , chemical engineering , nanotechnology , materials science , fluorescence , optics , optoelectronics , organic chemistry , physics , quantum mechanics , engineering , composite material
Uniformly sized and shaped Eu 3+ ‐doped silica nanowires were conventionally fabricated by the microemulsion method accompanied with a sol–gel process for the first time. The products were characterized by different techniques, and their luminescence properties were investigated and compared. The scanning electron microscopy and transmission electron microscopy images demonstrated that the as‐synthesized Eu 3+ ‐doped silica nanowires were formed in high yield with a smooth surface and a uniform diameter of about 130–150 nm. The results of FTIR spectroscopy, energy‐dispersive spectroscopy, and X‐ray diffraction showed that the Eu 3+ ions were doped into the silica network structure in the form of Si–O–Eu bonds. The effect of the Eu 3+ concentration on the luminescent intensity was investigated, and the highest emission intensity was found at the composition of 20 mol‐% Eu 3+ . The obtained Eu 3+ ‐doped silica nanowires exhibited characteristic luminescent emission of Eu 3+ at λ = 613 nm and apparent concentration quenching above the concentration of 20 mol‐% Eu 3+ . The growth processes of the silica nanowires were explained in detail on the basis of a modified vapor–liquid–solid mechanism.