The structure-directed effect of Al-based metal–organic frameworks on fabrication of alumina by thermal treatment

Journal Article · Fri May 15 04:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.02.011· OSTI ID:22475778

Liu, Dandan ^[1]; Dai, Fangna ^[1]; Tang, Zhe ^[1]; Liu, Yunqi ^[1]; Liu, Chenguang ^[1]

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1. State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, China National Petroleum Corp. (CNPC), China University of Petroleum (East China), Qingdao 266580 (China)

Highlights: • We use Al-MOFs as precursor in the fabrication process of mesoporous alumina by thermal treatment. • The obtained mesoporous alumina has dual pore system and five-fold aluminum. • The aluminum building units in the precursor show structure-directed effect on the formation of alumina. - Abstract: In this work, the block-shaped Al-based metal–organic frameworks (Al-MOFs) MIL-53 have been synthesized by hydrothermal method. To detect the correlation between the structure of Al-MOFs and the formation of alumina, the ligands are eliminated by thermal treatment. MIL-53 and the calcination products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), transmission electron microscopy (TEM), nitrogen adsorption–desorption and solid-state {sup 27}Al nuclear magnetic resonance ({sup 27}Al NMR). It was found that after calcination, the block-shaped Al-MOFs precursor turns into high-crystallinity mesoporous alumina nanosheets, and the thermal treatment product γ-alumina possesses a dual pore system and a large surface area (146 m{sup 2}/g), with five-fold aluminum. During the thermal treatment process, the structure of MIL-53 and its secondary building units have structure-directed effect in the formation of alumina.

• OSTI ID: 22475778
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 65; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CORRELATIONS
DESORPTION
FOURIER TRANSFORMATION
HEAT TREATMENTS
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
NANOSTRUCTURES
NUCLEAR MAGNETIC RESONANCE
ORGANOMETALLIC COMPOUNDS
PRECURSOR
SCANNING ELECTRON MICROSCOPY
SOLIDS
SURFACE AREA
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION