Preparation of Metal Nanoparticle Decorated Graphene Hybrid Composites: A Review
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MRS Advances © 2018 Materials Research Society DOI: 10.1557/adv.2018.30
Preparation of Metal Nanoparticle Decorated Graphene Hybrid Composites: A Review Zhongchi Wang1, Yunjie Ping1, Qiang Fu1,2 and Chunxu Pan1,2* 1
School of Physics and Technology, and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan, 430072, China
2
Center for Electron Microscopy, Wuhan University, Wuhan, 430072, China
ABSTRACT:
In recent years, the graphene/metal nanoparticles (NPs) hybrids have sparked burgeoning interest in varied application fields due to its unique physicochemical properties. In this paper, we present an overview of preparation methods of the graphene/metal NPs hybrids, which includes some common routes as well as other particular strategies. In addition, we introduce a novel physical route to decorate metal NPs upon graphene sheets. Our expectation is that this review will provide references for the exploitation of emerging preparation technologies, and expand application fields for graphene/metal NPs hybrids in the future.
INTRODUCTION Metal nanoparticles (NPs) are different from macroscopic, microscopic and other nanostructures because of their unique physical and chemical properties. Particularly, the free electrons in metal NPs are prone to interact with light or electromagnetic radiation, which results in strong absorption of visible and ultraviolet light, this phenomenon is the well-known surface plasmon resonance effect. In practical applications, molecules absorbed on metal NPs would be strongly excited by oscillating electrons [1]. Therefore, metal NPs exhibit highly catalytic activity, and display excellent performances in antibacterial and antitumor experiments [2]. Graphene is widely accepted as an ideal substrate for metal NPs due to its extremely high specific surface area, carrier mobility, mechanical flexibility, and chemical stability. As a result, graphene/metal NPs hybrids come into being. Accompanied with the booming applications of graphene in multitudinous fields, preparations and researches for graphene/metal NPs hybrids are more in-depth as well [3]. Generally, it is extensively believed that the followed factors are essential for preparing a desired graphene/metal NPs composite: 1) metal NPs are tightly bonded with graphene; 2) metal NPs are uniformly distributed on graphene; 3) the metal NPs are in homogeneous particle size. Very recently, preparation of the graphene/metal NPs (such as Au, Ag, Cu, Pt and Pd) hybrids can be accomplished by stacking metal NPs on graphene or by bridging
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metal NPs with graphene in covalent or non-covalent ways. As reported, chemical reduction, high temperature thermal synthesis, and electrochemical synthesis are common covalent approaches for preparing the graphene/metal NPs composites.
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