Synthesis for MIL-101(Cr)With highly cyclohexane catalytic oxidation performance by optimizing hydrothermal crystalline conditions
A series of metal organic framework MIL-101(Cr)have been successfully synthesized by opti-mizing hydrothermal crystalline conditions,and were applied to the liquid phase oxidation of cyclohexane with hydrogen peroxide(H2 O2 )as oxidant. The characteristic results from XRD,N2 adsorption and SEM showed the hydrothermal crystalline time and concentration of Cr species had a great influence on crystal-linity,morphology and pore structure properties of resultant MIL-101(Cr)materials. Among all MIL-101 (Cr)samples,the sample hydrothermally synthesized at 220 ℃ for 8 h with the H2 O/ Cr molar ratio of 370 exhibited the highest crystalline and specific surface area,more complete crystal morphology,and higher catalytic activity for the liquid phase selective oxidation of cyclohexane.
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