Synthesis, characterizations and catalytic allylic oxidation of limonene to carvone of cobalt doped mesoporous silica templated by reed leaves

Li, Junjie; Li, Zhiqiang; Zi, Guoli; Yao, Zhiang; Luo, Zhongrui; Wang, Yanmei; Xue, Dong; Wang, Baoqi; Wang, Jiaqiang

doi:10.1016/j.catcom.2014.10.022

Cited by 19 publications

(7 citation statements)

References 37 publications

(42 reference statements)

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“…Moreover, peak areas of linalool, sabinene, and ocimene descended with the increase of extraction temperature, which were inferred to be consequence of chemical reactions at an over-temperature. It has been reported that limonene could be oxidized to carvone [27] or dehydrogenated to para-cymene [28] under certain conditions. It can also generate α -terpineol [29] and terpin hydrates with water molecules in the presence of mineral acids.…”

Section: Resultsmentioning

confidence: 99%

Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis

Geng

Zhan

Tian

et al. 2019

International Journal of Analytical Chemistry

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A single-factor gradual optimization method was developed in this experiment in order to improve the headspace solid-phase microextraction (HS-SPME) effect of volatile compounds in pepper chicken soup. The different extraction conditions included fibers with different coating materials, sample volume, extraction temperature, and extraction time. The total peak areas and the numbers of valid peaks were compared and analyzed as the indicators of condition optimization. Gas chromatography-mass spectrometry (GC-MS) results showed that the four factors all have significant impact on the extraction effect of volatiles in pepper chicken soup. Using the principal component analysis (PCA), the optimal conditions of HS-SPME were inferred below: an extraction fiber of 50/30μm DVB/CAR/PDMS, a sample volume of 7 g, an extraction temperature of 65°C, and an extraction time of 30 min. Compared to the original extraction conditions, the optimized conditions were especially advantageous for the comprehensive analysis of volatiles, which could be potentially used in further study of soup.

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Section: Resultsmentioning

confidence: 99%

Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis

Geng

Zhan

Tian

et al. 2019

International Journal of Analytical Chemistry

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“…For example, MFI-type zeolite frameworks with hierarchical porosity and complex architecture templated by Luffa sponge showed catalytic activity for cracking of n-hexane with no need for ion-exchange [26]. In our group, rice husks [27], natural rubber latex [28], and reed leaves [29] were used as templates in the preparing of cobalt doped porous titania-silica, mesoporous alumina, and mesoporous silica, which exhibited good catalytic activity for the selective oxidation of 4-methyl pyridine, tetralin, and limonene, respectively. They even offered significantly higher activity than same catalysts prepared by conventional templates such as poly (ethylene oxide)-block-poly (propylene oxide)-block-poly (ethylene oxide) (P123) [28].…”

Section: Introductionmentioning

confidence: 80%

Noble Metal-Free Ceria-Zirconia Solid Solutions Templated by Tobacco Materials for Catalytic Oxidation of CO

et al. 2016

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A series of ceria-zirconia solid solutions were synthesized using tobacco leaves, stems and stem-silks as biotemplates. A combination of physicochemical techniques such as powder X-ray diffraction (XRD), N 2 adsorption/desorption measurement, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the as-synthesized samples. The results show that the morphologies of the templates were well replicated in the obtained ceria-zirconia solid solutions. Catalytic oxidation activities of CO over the ceria-zirconia solid solutions were then investigated. The catalyst templated by tobacco stem-silk exhibited higher conversion of CO at lower temperature than that of ceria-zirconia solid solutions templated by tobacco leaves and stems or without templates due to its special morphology. The catalyst even showed similar CO conversion when compared to ceria-zirconia solid solutions doped with 1.0 wt % noble metals such as Pt, Ag and Au. The results highlighted the advantages of using tobacco as biotemplate.

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“…In another study, high conversion up to 93% of limonene was attained, while the selectivity for carvone was less than 7% [10]. In our previous study, cobalt-doped mesoporous silica templated by reed leaves exhibited high substrate conversion (100%) and relatively good product (carvone) selectivity (40.2%) for the allylic oxidation of limonene to carvone [11].…”

Section: Introductionmentioning

confidence: 85%

Liquid-Phase Catalytic Oxidation of Limonene to Carvone over ZIF-67(Co)

Yang

Chen

et al. 2019

Catalysts

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Liquid-phase catalytic oxidation of limonene was carried out under mild conditions, and carvone was produced in the presence of ZIF-67(Co), cobalt based zeolitic imidazolate framework, as catalyst, using t-butyl hydroperoxide (t-BHP) as oxidant and benzene as solvent. As a heterogeneous catalyst, the zeolitic imidazolate framework ZIF-67(Co) exhibited reasonable substrate–product selectivity (55.4%) and conversion (29.8%). Finally, the X-ray diffraction patterns of the catalyst before and after proved that ZIF-67(Co) acted as a heterogeneous catalyst, and can be reused without losing its activity to a great extent.

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Synthesis, characterizations and catalytic allylic oxidation of limonene to carvone of cobalt doped mesoporous silica templated by reed leaves

Cited by 19 publications

References 37 publications

Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis

Gradual Optimization of Headspace Solid-Phase Microextraction Conditions of Volatiles in Pepper Chicken Soup Combined with Gas Chromatography-Mass Spectrometry and Principal Component Analysis

Noble Metal-Free Ceria-Zirconia Solid Solutions Templated by Tobacco Materials for Catalytic Oxidation of CO

Liquid-Phase Catalytic Oxidation of Limonene to Carvone over ZIF-67(Co)

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