Citation: HU Han-Mei, XU Jun-Chan, GE Xin-Qing, SUN Mei, XUAN Han, ZHANG Ke-Hua. Hierarchical MoO₂ Microspheres：Hydrothermal Synthesis and Photocatalytic Performance for Degradation of Rhodamine B[J]. Chinese Journal of Inorganic Chemistry, ;2014, (2): 398-404. doi: 10.11862/CJIC.2014.060 shu

Hierarchical MoO₂ Microspheres：Hydrothermal Synthesis and Photocatalytic Performance for Degradation of Rhodamine B

HU Han-Mei ^1,2,, ,
XU Jun-Chan ¹ ,
GE Xin-Qing ¹ ,
SUN Mei ¹ ,
XUAN Han ¹ ,
ZHANG Ke-Hua ¹

1.
1 Key Laboratory of Functional Molecule Design and Interface Process, Anhui Jianzhu University, Hefei 230601, China;

Corresponding author: HU Han-Mei,
Received Date: 27 June 2013
Available Online: 11 October 2013
Fund Project:

Monodispersed and uniform hierarchical MoO₂ microspheres were synthesized through a one-pot hydrothermal reduction route. The crystal structure and morphology of the as-prepared products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and UV-Visible absorption spectroscopy. The results indicate that the MoO₂ microspheres with the size of 1.5 to 3.5 μm are assembled by tiny nanoflakes or nanoparticles. Comparative experimental results reveal that the parameters of synthetic conditions, such as the amount of reducing agent citric acid (C₆H₈O₇, CA) and mineralizer Na₂CO₃, greatly affect the growth of monodisperse MoO₂ microspheres. The orientated aggregation combining with Ostwald ripening growth mechanism of the MoO₂ microspheres was proposed, based on the evolution of the structure and the morphology with the extension of reaction time. Photocatalytic results indicate that the prepared MoO₂ microspheres exhibit higher photocatalytic activity for the degradation of Rhodamine B (RhB) in the presence of H₂O₂ under tungsten lamp irradiation.
- MoO₂;microspheres;hydrothermal synthesis;crystal growth;photocatalytic activity
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Hierarchical MoO₂ Microspheres：Hydrothermal Synthesis and Photocatalytic Performance for Degradation of Rhodamine B