Abstract

Advanced hybrid nanomaterials (nanohybrids) with unique tailored morphologies and compositions have been used for the target-oriented catalysts due to the structural or supportive properties of each moiety and the synergistic properties of the individual components. The rational design and development of nanohybrids by integrating highly porous silica into a nano metal-organic framework (NMOF) are expected to enable unique nanospace engineering in the resulting systems to optimize their utility in the target areas. Herein, we report the design and fabrication of advanced nanohybrids composed of dendritic fibrous nanosilica (DFNS) and DFNS/gold (DFNS/Au) hybrids as the core and zinc-based NMOF (Zn-NMOF) as the shell (DFNS@Zn-NMOF) through a solution-based approach. The combined fibrous morphology of DFNS and micropores of NMOF can be directly employed for nanospace engineering in the resulting multi-compositional and hierarchical systems in a controllable manner. The DFNS/Au dots@Zn-NMOF nanohybrid shows improved catalytic performance in the Knoevenagel condensation reaction, attributed mainly to the cooperative effect stemming from the suitably organized configurations of each component.

中文翻译：

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通过在树枝状纤维纳米二氧化硅（DFNS）和DFNS /金杂化物上生长纳米金属有机框架来进行“纳米工程”

摘要

由于每个部分的结构或支撑特性以及各个组分的协同特性，具有独特的定制形态和成分的先进杂化纳米材料（纳米杂化材料）已用于目标导向的催化剂。通过将高度多孔的二氧化硅整合到纳米金属-有机骨架（NMOF）中，合理设计和开发纳米混合体，有望在所得系统中实现独特的纳米空间工程设计，以优化其在目标领域的效用。在这里，我们报道了由纳米树突状纤维纳米二氧化硅（DFNS）和DFNS /金（DFNS / Au）杂化物和以锌基NMOF（Zn-NMOF）为壳（DFNS @ Zn- NMOF）。DFNS和NMOF的微孔的组合纤维形态可以可控的方式直接用于纳米空间工程中的多层结构和分层系统中。DFNS / Au点@ Zn-NMOF纳米杂化物在Knoevenagel缩合反应中显示出改进的催化性能，这主要归因于各组分的适当组织构型所产生的协同作用。