Characterization of CoMCM-41 mesoporous molecular sieves obtained by the microwave irradiation method

Journal Article · Mon Sep 15 04:00:00 EDT 2008 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2008.05.010· OSTI ID:21128446

Wei, Shen; Qian, Zhao; Mei, Li ^[1]; Jinyu, Chu ^[2]; Hengbo, Yin ^[1]

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1. School of Chemistry and Chemical Engineering, Jiangsu University, Jiangsu Province 212013 (China)
2. School of Environment, Jiangsu University, Jiangsu Province 212013 (China)

CoMCM-41 mesoporous molecular sieves with different amounts of cobalt were synthesized via the microwave irradiation method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), temperature programmed reduction (TPR), transmission electron microscopy (TEM) and N{sub 2} adsorption-desorption technique, and thermal and hydrothermal stabilities of synthesized CoMCM-41 samples were also investigated. Results show that these synthesized materials have typical mesoporous structure of MCM-41. Also, specific surface area and pore volume of synthesized CoMCM-41 decrease with increasing amount of cobalt added, and mesoporous ordering also decreases. When the molar ratio of SiO{sub 2}:CoO in the starting material is 1.0:0.05, mesoporous ordering of synthesized CoMCM-41 is the best among the four doping contents. On the other hand, results of thermal and hydrothermal tests show that CoMCM-41 after calcination at 750 deg. C for 3 h or hydrothermal treatment at 100 deg. C for 5 days still retains mesostructure. However, mesoporous framework is entirely damaged after calcination at 850 deg. C for 3 h. - Graphical abstract: CoMCM-41 mesoporous molecular sieves with different amounts of cobalt were synthesized via the microwave irradiation method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), temperature programmed reduction (TPR), transmission electron microscopy (TEM) and N{sub 2} adsorption-desorption technique, and thermal and hydrothermal stabilities of synthesized CoMCM-41 samples were also investigated. The results show that these synthesized materials have typical MCM-41 structure and highly thermal and hydrothermal stabilities.

• OSTI ID: 21128446
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 181; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ADSORPTION
CALCINATION
COBALT
COBALT OXIDES
DESORPTION
FOURIER TRANSFORMATION
INFRARED SPECTRA
IRRADIATION
MICROWAVE RADIATION
MOLECULAR SIEVES
SILICON OXIDES
SPECIFIC SURFACE AREA
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 1000-4000 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION