Preparation and characterization of vernolic acid methyl ester functionalized ordered mesoporous materials

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-03-06 DOI:10.4314/bcse.v37i3.12

Y. Chebude, G. Gonfa, I. Díaz

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Abstract

ABSTRACT. Vernonia oil is a naturally epoxidized triglyceride oil extracted from the seed of Vernonia galamensis, a native plant in East Africa. After hydrolysis to vernolic acid (VA) and derivatization, vernolic acid methyl ester (VAME) is synthesized and used to functionalize ordered mesoporous materials (OMM). Al-MCM-41 with Si/Al ratio of 15, pure silica SBA-15 and periodic mesoporous organosilica (PMO) are employed as supports exploring the different surface properties. Following optimization of the VAME/OMM ratios, selected samples, i.e. those with 13% VAME, were impregnated with AgNO3 in NaBH4 to obtain Ag-nanoparticles. The final AgVAME-OMM potential catalysts were characterized by transmission electron microscopy, observing an efficient loading of Ag nanoparticles in pure silica SBA-15 with VAME with 500 m2 specific surface area and 6 nm pore size. KEY WORDS: Vernolic acid methyl ester, Vernonia oil, Functionalization, Ordered mesoporous materials, Catalysis Bull. Chem. Soc. Ethiop. 2023, 37(3), 689-702. DOI: https://dx.doi.org/10.4314/bcse.v37i3.12

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羊油酸甲酯功能化有序介孔材料的制备与表征

摘要。斑蝥油是一种天然的环氧化甘油三酯油，从东非本地植物斑蝥的种子中提取。经水解制备了丙烯酸甲酯（VAME），并将其用于有序介孔材料（OMM）的功能化。采用Si/Al比为15的Al-MCM-41、纯二氧化硅SBA-15和周期性介孔有机二氧化硅（PMO）作为载体，探索了不同的表面性质。在优化VAME/OMM比率之后，用NaBH4中的AgNO3浸渍选定的样品，即具有13%VAME的样品，以获得Ag纳米颗粒。通过透射电子显微镜对最终的AgVAME-OMM潜在催化剂进行表征，观察到Ag纳米颗粒在具有500m2比表面积和6nm孔径的VAME的纯二氧化硅SBA-15中的有效负载。关键词：Vernolic acid methyl ester，Veronia oil，官能化，有序介孔材料，Catalysis Bull。化学。Soc.Ethiop。2023,37（3），689-702.DOI:https://dx.doi.org/10.4314/bcse.v37i3.12

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来源期刊

Bulletin of the Chemical Society of Ethiopia 化学-化学综合

CiteScore

2.20

自引率

8.30%

发文量

113

审稿时长

6-12 weeks

期刊介绍： The Bulletin of the Chemical Society of Ethiopia (BCSE) is a triannual publication of the Chemical Society of Ethiopia. The BCSE is an open access and peer reviewed journal. The BCSE invites contributions in any field of basic and applied chemistry.