Microwave-assisted fast vapor-phase transport synthesis of MnAPO-5 molecular sieves

Journal Article · Thu Apr 02 00:00:00 EDT 2009 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2008.08.006· OSTI ID:21199751

Hui, Shao ^[1]; Jianfeng, Yao; Xuebin, Ke ^[1]; Nanping, Xu ^[1]

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1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009 (China)

MnAPO-5 was prepared by a microwave-assisted vapor-phase transport method at 180 deg. C in short times. The products were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectra, UV-vis spectroscopic measurement, NH{sub 3}-temperature-programmed desorption and esterification reaction. It was found that dry gels prepared with aluminum isopropoxide, phosphoric acid and manganese acetate could be transferred to MnAPO-5 in the vapors of triethylamine and water by the microwave-assisted vapor-phase transport method at 180 deg. C for less than 30 min. The crystallization time was greatly reduced by the microwave heating compared with the conventional heating. The resulting MnAPO-5 exhibited much smaller particle sizes, higher surface areas and slightly higher catalytic activity in the esterification of acetic acid and butyl alcohol than those prepared by the conventional vapor-phase transport method and hydrothermal synthesis.

• OSTI ID: 21199751
• Journal Information: Materials Research Bulletin, Vol. 44, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2008.08.006; PII: S0025-5408(08)00277-8; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACETATES
ACETIC ACID
ALUMINIUM COMPOUNDS
BUTANOLS
CRYSTAL GROWTH
CRYSTALLIZATION
ESTERIFICATION
GELS
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
MANGANESE COMPOUNDS
MICROWAVE HEATING
MICROWAVE RADIATION
MOLECULAR SIEVES
PARTICLE SIZE
PHOSPHORIC ACID
SCANNING ELECTRON MICROSCOPY
SURFACE AREA
VAPORS
X-RAY DIFFRACTION