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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Sonication-assisted synthesis of a new heterostructured schiff base ligand Silver-Guar gum encapsulated nanocomposite as a visible light photocatalyst
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Sonication-assisted synthesis of a new heterostructured schiff base ligand Silver-Guar gum encapsulated nanocomposite as a visible light photocatalyst

机译：超声辅助合成一种新的异性结构化Schiff碱配体银 - 瓜尔胶囊包封纳米复合材料作为可见光光催化剂

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摘要

A heterostructured Schiff base ligand (Benzildiethylenetriamine)-Silver-Guar gum encapsulated nanocomposites was intended to prepare by simple sonication assisted reflux method. Appropriate composition of purified guar gum, Schiff base ligand and silver nitrate were used for the synthesis. The synthesised nanocomposites were characterised by photoluminescence spectrum, UV-vis diffuse reflectance spectrophotometer, Fourier transform infra-red spectroscopy, X-ray diffractometer, scanning electron microscopy and transmission electron microscopy. The crystalline peaks of XRD and FTIR reveals that Schiff base ligand and guar gum forms metal-organic matrix. Morphology studies have confirmed the organic framework structure and metallic silver nanoparticles are embedded on the organic framework. The efficiency of nanocomposites depends on adsorption capacity and silver nanoparticles that are encapsulated thereby increasing the visible light absorption through surface plasma resonance. The nanocomposite was proved to be highly selective in hydrogenation reaction which favoured the formation of aniline from nitrobenzene as single product with short reaction time and 90% conversion.
机译：采用简单的超声辅助回流法制备了异结构席夫碱配体（苯并二乙烯三胺）-银瓜尔胶纳米复合材料。合成中使用了合适的纯化瓜尔胶、席夫碱配体和硝酸银。通过光致发光光谱、紫外-可见漫反射分光光度计、傅里叶变换红外光谱、X射线衍射仪、扫描电子显微镜和透射电子显微镜对合成的纳米复合材料进行了表征。XRD和FTIR的结晶峰显示席夫碱配体和瓜尔胶形成金属有机基质。形态学研究证实了有机骨架结构，金属银纳米粒子嵌入在有机骨架上。纳米复合材料的效率取决于吸附容量和银纳米颗粒，银纳米颗粒通过表面等离子体共振增加可见光吸收。结果表明，该纳米复合材料在加氢反应中具有很高的选择性，有利于硝基苯作为单一产物生成苯胺，反应时间短，转化率高达90%。

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