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Building nestlike microsphere Nb2O5:Tb3+ for effective catalytic degradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
52535 46876 2009 4 PDF Available
Title
Building nestlike microsphere Nb2O5:Tb3+ for effective catalytic degradation
Abstract

Nb2O5:Tb3+ nestlike microspheres have been synthesized by a self-assembly of nanosheets using the composite-hydroxide-mediated method. The characterizations of X-ray diffraction, scanning electron microscopy, transmission electron microscopy and high resolution transmission electron microscopy show the Nb2O5:Tb3+ crystals have a monoclinic phase, polycrystalline structure, unique nestlike shape, and an average diameter of ∼1 μm. Comparing UV–vis spectrum of Nb2O5:Tb3+ microspheres with that of Nb2O5 nanoparticles, we have found the red shift of absorption edge of Nb2O5:Tb3+ microspheres due to the impurity band formation. The catalytic activity of Nb2O5:Tb3+ microspheres has also been compared with that of the Nb2O5 nanoparticles, indicating an excellent catalytic degradation activity of the Nb2O5:Tb3+ microspheres to methyl orange owing to its hierarchical structure and effective absorption of light. The effective catalytic degradation activity suggests its possible application in the organic pollutant treatment.

Keywords
Composite-hydroxide-mediated; Nb2O5:Tb3+; Nestlike microsphere; Degradation
First Page Preview
Building nestlike microsphere Nb2O5:Tb3+ for effective catalytic degradation
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 3, 25 November 2009, Pages 206–209
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis