Synthesis and optical properties of Mg-Al layered double hydroxides precursor powders
Source abstract
Abstract
The synthesis and optical properties of Mg-Al layered double hydroxide (LDH) precursor powders were investigated using X-ray diffraction (XRD), Fourier transform-infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), selected area electron diffraction (SAED), high-resolution TEM (HRTEM), UV-transmission spectrometer, and fluorescence spectrophotometer. The FT-IR results show that the intense absorption at around 1363–1377 cm-1 can be assigned to the antisymmetric ν3 mode of interlayer carbonate anions because the LDH phase contains some CO32-. The XRD results show that all of the Mg-Al LDH precursor powders contain only a single phase of [Mg0.833Al0.167(OH)2](CO3)0.083·(H2O)0.75 but have broad and weak intensities of peaks. All of Mg-Al LDHs precursor powders before calcination have the same photoluminescence (PL) spectra. Moreover, these spectra were excited at λex = 235 nm, and the broad emission band was in the range 325-650 nm. In the range, there were relatively strong intensity at around 360, 407 and 510 nm, respectively.
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Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Magnesium Oxide Properties and Applications · Inorganic Chemistry and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Fragrance and Cosmetic Science, Kaohsiung Medical University 1 , 100 Shin-Chuan 1 st Road, Kaohsiung 80782, Taiwan
Department of Materials Science and Engineering, National Cheng Kung University 2 , 1 Ta-Hsueh Road, Tainan 70101, Taiwan
Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University 3 , 1 Ta-Hsueh, Road, Tainan 70101, Taiwan
Department of Medical Research, Kaohsiung Medical University Hospital 4 , 100 Tzyou 1st Road, Kaohsiung 80782, Taiwan
Funding
Ministry of Science and Technology, Taiwan
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