Facile solvothermal synthesis of graphene-MnOOH nanocomposites

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.08.026· OSTI ID:21504019

Sheng, Chen ^[1]; Huajie, Huang ^[1]; Guiyu, Zeng; Fude, Nie ^[2]

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1. Key Laboratory of Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Ministry of Education, Nanjing 210094 (China)
2. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900 (China)

In this paper, we report a facile solvothermal route capable of aligning MnOOH nanocrystals on graphene. X-ray diffraction (XRD) and transmission electron microscopy (TEM) observations indicate that the exfoliated graphene sheets are decorated randomly by MnOOH nanocrystals, forming well-dispersed graphene-MnOOH nanocomposites. Dissolution-crystallization and oriented attachment are speculated to be the vital mechanisms in the synthetic process. The attachment of additives, such as MnOOH nanoparticles, are found to be beneficial for the exfoliation of GO as well as preventing the restack of graphene sheets. Moreover, cyclic voltammetry (CV) analyses suggest that the electrochemical reversibility is improved by anchoring MnOOH on graphene. Notably, the as-fabricated nanocomposites reveal unusual catalytic performance for the thermal decomposition of ammonium perchlorate (AP) due to the concerted effects of graphene and MnOOH. This template-free method is easy to reproduce, and the process proceeds at a low temperature and can be readily extended to prepare other graphene-based nanocomposites. - Graphical abstract: Manganese oxyhydroxide nanocrystals have been successfully attached onto the graphene sheets via an oriented attachment and dissolution-crystallization process, forming a nanocomposite with unusual catalytic capabilities. Display Omitted

• OSTI ID: 21504019
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 11; Other Information: DOI: 10.1016/j.jssc.2010.08.026; PII: S0022-4596(10)00360-9; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIUM PERCHLORATES
CATALYSIS
COMPOSITE MATERIALS
CRYSTALLIZATION
DISSOLUTION
ELECTROCHEMISTRY
GRAPHITE
MANGANESE HYDROXIDES
NANOSTRUCTURES
PERFORMANCE
PYROLYSIS
SHEETS
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
VOLTAMETRY
X-RAY DIFFRACTION
AMMONIUM COMPOUNDS
CARBON
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
COHERENT SCATTERING
DECOMPOSITION
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
MANGANESE COMPOUNDS
MATERIALS
MICROSCOPY
MINERALS
NONMETALS
OXYGEN COMPOUNDS
PERCHLORATES
PHASE TRANSFORMATIONS
SCATTERING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS