Open AccessPhotoluminescence of macroporous-alumina prepared by polyacrylamide gel technique
Author(s) -
Gao Xiao-Lin,
Shifa Wang,
Xiang Xi,
Chunming Liu,
Xihong Zu
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.016105
Subject(s) - photoluminescence , materials science , scanning electron microscope , luminescence , polyacrylamide , sintering , wavelength , porosity , excitation wavelength , sol gel , photoluminescence excitation , analytical chemistry (journal) , chemical engineering , optoelectronics , composite material , nanotechnology , chromatography , chemistry , polymer chemistry , engineering
Macroporous -Al2O3 is synthesized by polyacrylamide gel technique. X-ray diffractor combined with a photoluminescence spectrophotometer is used to investigate the formation of Al2O3 phase and the light emission properties of xerogel sintered at different temperatures. It is demonstrated that high-purity -Al2O3 can be obtained at a sintering temperature of 1150 ℃. Scanning electron microscopy images reveal that the synthesized -Al2O3 has a monolithic structure. Photoluminescence spectra show that a major emission band around 365 nm and a weaker side band around 330 nm are observed when the excitation wavelength is 228 nm. The pore-formation and luminescence mechanisms of porous alumina are discussed based on the experimental results.