Controlled synthesis of α-MnO{sub 2} nanowires and their catalytic performance for toluene combustion

Journal Article · Tue Mar 15 00:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.11.017· OSTI ID:22581458

Cheng, Gao ^[1]; Yu, Lin ^[1]; Lan, Bang ^[1]; Sun, Ming; Lin, Ting; Fu, Zhiwei; Su, Xiaohui; Qiu, Minqiao; Guo, Canhui; Xu, Bin ^[1]

---

1. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006 (China)

Highlights: • One-dimensional α-MnO{sub 2} nanowires were prepared by a facile hydrothermal route. • Shape and crystal phase of the products were controlled by tuning reaction conditions. • A possible formation mechanism of the α-MnO{sub 2} nanowires was discussed. • The α-MnO{sub 2} nanowires showed great catalytic activity for toluene combustion. - Abstract: α-MnO{sub 2} nanowires with a length about 6–10 μm and an average diameter of 20 nm were synthesized through a facile hydrothermal process without any templates or surfactants. The products were characterized by X-ray powder diffraction, Raman spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, hydrogen temperature-programmed reduction techniques, X-ray photoelectron spectroscopy and surface area analysis. The effects of the hydrothermal temperature and the concentration of CH{sub 3}COOH on the crystal phase and morphology of the final products were studied in detail. The hydrothermal temperature and the concentration of CH{sub 3}COOH play crucial roles in determining the crystal phase and morphology of the products. The possible formation mechanism of the α-MnO{sub 2} nanowires was investigated and discussed. Additionally, the as-prepared α-MnO{sub 2} nanowires showed higher catalytic activity for toluene combustion than the commercial MnO{sub 2}, suggesting their potential applications in the elimination of volatile organic compounds.

• OSTI ID: 22581458
• Journal Information: Materials Research Bulletin, Vol. 75; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACETIC ACID
COMBUSTION
CONCENTRATION RATIO
CRYSTAL STRUCTURE
CRYSTALS
FIELD EMISSION
MANGANESE OXIDES
MORPHOLOGY
NANOWIRES
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SURFACE AREA
SYNTHESIS
TEMPERATURE DEPENDENCE
TOLUENE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY