Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor

<p>Abstract</p> <p>Synthesis and characterization of long wavelength visible-light absorption Cu-doped TiO<sub>2 </sub>nanomaterials with well-controlled properties such as size, composition, morphology, and crystal phase have been demonstrated in a single-step flame ae...

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Main Authors: Sahu Manoranjan, Biswas Pratim
Format: Article
Language:English
Published: SpringerOpen 2011-01-01
Series:Nanoscale Research Letters
Online Access:http://www.nanoscalereslett.com/content/6/1/441
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spelling doaj-c80b3ddf3c7b4eb7877fa44e8fc7b21c2020-11-24T21:58:57ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161441Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactorSahu ManoranjanBiswas Pratim<p>Abstract</p> <p>Synthesis and characterization of long wavelength visible-light absorption Cu-doped TiO<sub>2 </sub>nanomaterials with well-controlled properties such as size, composition, morphology, and crystal phase have been demonstrated in a single-step flame aerosol reactor. This has been feasible by a detailed understanding of the formation and growth of nanoparticles in the high-temperature flame region. The important process parameters controlled were: molar feed ratios of precursors, temperature, and residence time in the high-temperature flame region. The ability to vary the crystal phase of the doped nanomaterials while keeping the primary particle size constant has been demonstrated. Results indicate that increasing the copper dopant concentration promotes an anatase to rutile phase transformation, decreased crystalline nature and primary particle size, and better suspension stability. Annealing the Cu-doped TiO<sub>2 </sub>nanoparticles increased the crystalline nature and changed the morphology from spherical to hexagonal structure. Measurements indicate a band gap narrowing by 0.8 eV (2.51 eV) was achieved at 15-wt.% copper dopant concentration compared to pristine TiO<sub>2 </sub>(3.31 eV) synthesized under the same flame conditions. The change in the crystal phase, size, and band gap is attributed to replacement of titanium atoms by copper atoms in the TiO<sub>2 </sub>crystal.</p> http://www.nanoscalereslett.com/content/6/1/441
collection DOAJ
language English
format Article
sources DOAJ
author Sahu Manoranjan
Biswas Pratim
spellingShingle Sahu Manoranjan
Biswas Pratim
Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
Nanoscale Research Letters
author_facet Sahu Manoranjan
Biswas Pratim
author_sort Sahu Manoranjan
title Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
title_short Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
title_full Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
title_fullStr Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
title_full_unstemmed Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
title_sort single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor
publisher SpringerOpen
series Nanoscale Research Letters
issn 1931-7573
1556-276X
publishDate 2011-01-01
description <p>Abstract</p> <p>Synthesis and characterization of long wavelength visible-light absorption Cu-doped TiO<sub>2 </sub>nanomaterials with well-controlled properties such as size, composition, morphology, and crystal phase have been demonstrated in a single-step flame aerosol reactor. This has been feasible by a detailed understanding of the formation and growth of nanoparticles in the high-temperature flame region. The important process parameters controlled were: molar feed ratios of precursors, temperature, and residence time in the high-temperature flame region. The ability to vary the crystal phase of the doped nanomaterials while keeping the primary particle size constant has been demonstrated. Results indicate that increasing the copper dopant concentration promotes an anatase to rutile phase transformation, decreased crystalline nature and primary particle size, and better suspension stability. Annealing the Cu-doped TiO<sub>2 </sub>nanoparticles increased the crystalline nature and changed the morphology from spherical to hexagonal structure. Measurements indicate a band gap narrowing by 0.8 eV (2.51 eV) was achieved at 15-wt.% copper dopant concentration compared to pristine TiO<sub>2 </sub>(3.31 eV) synthesized under the same flame conditions. The change in the crystal phase, size, and band gap is attributed to replacement of titanium atoms by copper atoms in the TiO<sub>2 </sub>crystal.</p>
url http://www.nanoscalereslett.com/content/6/1/441
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AT biswaspratim singlestepprocessingofcopperdopedtitaniananomaterialsinaflameaerosolreactor
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