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Synthesis and Evaluation of Porous Semiconductor Hexaniobate Nanotubes for Photolysis of Organic Dyes in Wastewater

Materials Research and Technology Institute, University of Texas at El Paso, 500 W. University Ave., El Paso, TX 79968, USA
Departmento de Física y Matemáticas, Instituto de Ingeniería y Tecnología, UACJ, Avenida del Charro #450 Nte. Cd. Juárez, Chihuahua, C.P. 32310, Mexico
Universidad de Puerto Rico-Mayaguez, 259 Blvd. Alfonso Valdez Cabian, Mayagüez 00680, Puerto Rico
Author to whom correspondence should be addressed.
Catalysts 2014, 4(4), 346-355;
Received: 24 May 2014 / Revised: 23 September 2014 / Accepted: 28 September 2014 / Published: 27 October 2014
PDF [3936 KB, uploaded 28 October 2014]


We present the chemical synthesis of hexaniobate nanotubes using two routes, (1) starting material K4Nb6O17 and (2) parent material of H4Nb6O17 via ion exchange. The as-synthesized materials were exfoliated by adjusting the pH to 9–10 using tetra-n-butylammonioum hydroxide (TBA+OH), leading to a formation of hexaniobate nanotubes. In order to understand morphology a full characterization was conducted using SEM, HRTEM, BET and powder-XRD. The photocatalytic activity was evaluated using photolysis method using Bromocresol Green (BG) and Methyl Orange (MO) as model contaminants. Results indicate a nanotube porous oxide with large porous and surface area; the photocatalytic activity is about 95% efficient when comparing with commercial TiO2. View Full-Text
Keywords: nanotubes; photo-catalysis; niobium; STEM nanotubes; photo-catalysis; niobium; STEM

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Zarei-Chaleshtori, M.; Correa, V.; López, N.; Ramos, M.; Edalatpour, R.; Rondeau, N.; Chianelli, R.R. Synthesis and Evaluation of Porous Semiconductor Hexaniobate Nanotubes for Photolysis of Organic Dyes in Wastewater. Catalysts 2014, 4, 346-355.

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