Synthesis, properties and applications of flowerlike Ni–NiO composite microstructures

Literature Information

Publication Date 2013-05-17
DOI 10.1039/C3TA11219E
Impact Factor 12.732
Authors

Feifei Yuan, Yonghong Ni, Li Zhang, Shengmei Yuan, Jieding Wei


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Abstract

In this paper, we report the successful synthesis of flowerlike Ni–NiO composite microstructures with room-temperature magnetism via a simple water–DMF (N,N-dimethylformamide) mixed solvothermal process with sequential thermal treatment, using sodium hypophosphite hydrate (NaH2PO2·H2O) and nickel sulfate (NiSO4·6H2O) as the starting reactants. The phase and morphology of the as-prepared product are characterized by means of powder X-ray diffraction, energy dispersive spectrometry, selected area electron diffraction (SAED), transmission electron microscopy, and scanning electron microscopy. Experiments show that the flowerlike Ni–NiO composite microstructures are obtained by the shape-preserved conversion of the precursor. Our investigation reveals that the as-prepared flowerlike Ni–NiO composite microstructures exhibit good electrochemical responses in 1 M NaOH solution and can be used as an electrochemical catalyst for the oxidation of methanol. Also, the as-prepared flowerlike Ni–NiO composite microstructures have a stronger catalytic activity for the chemical reduction of 4-nitrophenol to 4-aminophenol by NaBH4 than pure Ni nanospheres or flowerlike NiO microstructures.

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Journal of Materials Chemistry A

Journal of Materials Chemistry A
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