Nano Archive

Self-assembly of novel mesoporous manganese oxide nanostructures and their application in oxidative decomposition of formaldehyde

Chen, Hongmin and He, Junhui and Zhang, Changbin and He, Hong (2007) Self-assembly of novel mesoporous manganese oxide nanostructures and their application in oxidative decomposition of formaldehyde. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (49). pp. 18033-18038.

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Official URL: http://pubs.acs.org/doi/full/10.1021/jp076113n

Abstract

Monodisperse manganese oxide honeycomb and hollow nanospheres have been prepared facilely at room temperature by varying the molar ratio of KMnO4 and oleic acid. These new nanomaterials were characterized by XRD, SEM, EDS, TEM, and BET measurements. They had robust nanostructures and were stable even after ultrasonic treatment (40 kHz, 120 W) for 30 min. A plausible mechanism of the formation of manganese oxide nanostructures was proposed. The manganese oxide nanomaterials showed high catalytic activities for oxidative decomposition of formaldehyde at low temperatures. Complete conversion of formaldehyde to CO2 and H2O could be achieved, and harmful byproducts were not detected in effluent gases. The catalytic activity of manganese oxide hollow nanospheres was much higher than that of honeycomb nanospheres, although the surface area of the latter was nearly 2 times as high as that of the former. The mechanism of such morphology-dependent catalytic activity was discussed in detail. The catalytic activities of the obtained manganese oxide nanospheres were also significantly higher than those of previously reported manganese oxide octahedral molecular sieve (OMS-2) nanorods, MnOx, powders, and alumina-supported manganese-palladium oxide catalysts. Potential applications and future research efforts were proposed.

Item Type:Article
Uncontrolled Keywords:self assembly - mesoporus - nanostructure - manganese oxide - nanorods
Subjects:Analytical Science > Microscopy and probe methods
Material Science > Nanochemistry
ID Code:5893
Deposited By:IoN
Deposited On:02 Sep 2009 11:20
Last Modified:02 Sep 2009 11:20

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