Park, Eun Young
(Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University)
,
Hasan, Zubair
(Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University)
,
Ahmed, Imteaz
(Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University)
,
Jhung, Sung Hwa
(Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University)
A porous metal-organic framework (MOF), MIL-101, was synthesized in the presence of sulfated zirconia (SZ) to produce acidic SZ/MIL-101 composites for the first time. The composites were characterized with XRD, nitrogen adsorption, FT-IR, scanning electron microscope, chemical analysis and so on. Th...
A porous metal-organic framework (MOF), MIL-101, was synthesized in the presence of sulfated zirconia (SZ) to produce acidic SZ/MIL-101 composites for the first time. The composites were characterized with XRD, nitrogen adsorption, FT-IR, scanning electron microscope, chemical analysis and so on. The composites (SZ/MIL-101s) were successfully applied in a liquid-phase esterification for a high yield of ester. This catalytic result of SZ/MIL-101, compared with that of pure SZ or MIL-101 (showing a negligible yield of ester), suggests that the SZ in the composite is highly active in the acid catalysis probably because of the well-dispersed active species of SZ. Moreover, the esterification is catalyzed in heterogeneous mode as confirmed by negligible esterification after filtration of the catalyst. Finally, microwaves can be efficiently applied both in the synthesis of the composites and the esterification reaction to accelerate the two processes of synthesis and esterification by about 5 times.
A porous metal-organic framework (MOF), MIL-101, was synthesized in the presence of sulfated zirconia (SZ) to produce acidic SZ/MIL-101 composites for the first time. The composites were characterized with XRD, nitrogen adsorption, FT-IR, scanning electron microscope, chemical analysis and so on. The composites (SZ/MIL-101s) were successfully applied in a liquid-phase esterification for a high yield of ester. This catalytic result of SZ/MIL-101, compared with that of pure SZ or MIL-101 (showing a negligible yield of ester), suggests that the SZ in the composite is highly active in the acid catalysis probably because of the well-dispersed active species of SZ. Moreover, the esterification is catalyzed in heterogeneous mode as confirmed by negligible esterification after filtration of the catalyst. Finally, microwaves can be efficiently applied both in the synthesis of the composites and the esterification reaction to accelerate the two processes of synthesis and esterification by about 5 times.
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제안 방법
43 MIL-101 is a very important material due to its mesoporous structure and huge porosity, and is widely studied for various applications. In this study, synthesis of SZ/MIL-101 composites and esterification with those composites were performed for the first time. The synthesized composites were characterized with XRD, nitrogen adsorption, FT-IR, SEM and chemical analysis.
In this study, synthesis of SZ/MIL-101 composites and esterification with those composites were performed for the first time. The synthesized composites were characterized with XRD, nitrogen adsorption, FT-IR, SEM and chemical analysis. Moreover, the composites, because of the acidic SZ, can be applied in esterification, suggesting the composites formation is a novel way to utilize the acidic SZ in heterogeneous catalyses.
It has been reported that the bands between 1200 and 870 cm−1 are attributed to the stretching vibrations of SO.48 Therefore, based on the FT-IR, it can be confirmed that SZ exists in the MIL-101s which is in agreement with the results of the elemental analysis for sulfur content and acid site density. The SEM images (Figure 6) of the SZ/MIL101s show that the morphologies of the SZ/MIL-101s are homogeneous even with the composing of MIL-101 with SZ.
대상 데이터
All of the chemicals such as zirconium (IV) hydroxide (Zr(OH)4, Sigma Aldrich, 97%), terephthalic acid (TPA, Sigma Aldrich, 99%), chromium nitrate nonahydrate (Samchun chemicals, Cr(NO3)3·9H2O, 99%), methanol (OCI chemicals, 99.9%), sulfuric acid (OCI chemicals, 95%) and oleic acid (Junsei chemicals, EP) utilized in this study were commercial products and used without any further purification.
Oliveira, C. F.; Dezaneti, L. M.; Garcia, F. A. C.; de Macedo, J. L.; Dias, J. A.; Dias, S. C. L.; Alvim, K. S. P. Applied Catal. A: Gen. 2010, 372, 153.
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