One-Step Strategy to Graphene/Layered Double Hydroxide (LDH) Nanohybrids as Advanced Electrochemical Applications

One-Step Strategy to Graphene/Layered Double Hydroxide (LDH) Nanohybrids as Advanced Electrochemical Applications

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Lonkar et al. reported a one-step synthesis method to synthesize graphene/Zn–Al LDH hybrids through microwave-assisted growth of 2D LDHs with simultaneous in situ reduction of graphene oxide (GO) to graphene (RGO) under hydrothermal conditions. In this facile and rapid synthetic procedure, the exfoliated GO was reduced to graphene using in situ hydrolyzed urea (ammonia). The microwave system was heated gradually to 120 ºC under microwave irradiation at a power of 200 W for 2 h.

The experimental results reveal that the reduction of graphene oxide is successfully completed and the restacking of the graphene sheets is effectively prevented from a complete exfoliation state of graphene in the RGO/LDH nanohybrids, which is observed by TEM, XRD and Raman. Moreover, the hybrids show improved electrochemical-specific capacitance, which attained maximum of 428 F g-1, almost 20% higher than that of pristine graphene. Furthermore, the RGO/Zn–Al LDH hybrids demonstrated good cycling stability.

The present approach may open a strategy in hybridizing graphene with multimetallic nano-oxides and hydroxides using microwave method.

Original article citation

Sunil P. Lonkar, Jean-Marie Raquez, Philippe Dubois, “One-Pot Microwave-Assisted Synthesis of Graphene/Layered Double Hydroxide (LDH) Nanohybrids”, Nano-Micro Lett. 7(4), 332-340 (2015). doi:10.1007/s40820-015-0047-3

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