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Coatings 2015, 5(3), 511-526; doi:10.3390/coatings5030511

Photocatalytic Properties of Nb/MCM-41 Molecular Sieves: Effect of the Synthesis Conditions

Science and Technology in Ceramic Materials Group (CYTEMAC), Department of Physics—FACNED, University of Cauca, Popayan 190001, Colombia
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Academic Editor: Anibal Maury-Ramirez
Received: 1 April 2015 / Revised: 12 August 2015 / Accepted: 13 August 2015 / Published: 20 August 2015
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Abstract

The effect of synthesis conditions and niobium incorporation levels on the photocatalytic properties of Nb/MCM-41 molecular sieves was assessed. Niobium pentoxide supported on MCM-41 mesoporous silica was obtained using two methods: sol-gel and incipient impregnation, in each case also varying the percentage of niobium incorporation. The synthesized Nb-MCM-41 ceramic powders were characterized using the spectroscopic techniques of infrared spectroscopy (IR), Raman spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The photodegradation capacity of the powders was studied using the organic molecule, methylene blue. The effect of both the method of synthesis and the percentage of niobium present in the sample on the photodegradation action of the solids was determined. The mesoporous Nb-MCM-41 that produced the greatest photodegradation response was obtained using the sol-gel method and 20% niobium incorporation. View Full-Text
Keywords: synthesis; mesoporous; niobium; photodegradation synthesis; mesoporous; niobium; photodegradation
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MDPI and ACS Style

Gomez, C.D.; Rodriguez-Paez, J.E. Photocatalytic Properties of Nb/MCM-41 Molecular Sieves: Effect of the Synthesis Conditions. Coatings 2015, 5, 511-526.

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