Nonhydrolytic Route to Boron-Doped TiO2 Nanocrystals
| Autor: | Barbara Federica Scremin, Paride Papadia, Cosimino Malitesta, Giuseppe Gigli, Elvio Carlino, Giuseppe Ciccarella, Hua Xu, Luisa De Marco, Marco Mazzeo, Angela Scrascia, Claudia Carlucci, Cinzia Giannini, Rosaria Anna Picca |
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| Přispěvatelé: | H., Xu, Picca, ROSARIA ANNA, L. D., Marco, C., Carlucci, Scrascia, Angela, Papadia, Paride, B. F., Scremin, E., Carlino, C., Giannini, Malitesta, Cosimino, Mazzeo, Marco, Gigli, Giuseppe, Ciccarella, Giuseppe |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Anatase
Absorption spectroscopy Brookite Inorganic chemistry chemistry.chemical_element Crystal engineering Nanocrystal Nanocrystals Titanium dioxide Boron Doping Inorganic Chemistry chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy visual_art Titanium dioxide visual_art.visual_art_medium Spectroscopy High-resolution transmission electron microscopy |
| Zdroj: | European journal of inorganic chemistry (Internet) 2013 (2012): 364–374. doi:10.1002/ejic.201200842 info:cnr-pdr/source/autori:Hua Xu, Rosaria Anna Picca, Luisa De Marco, Claudia Carlucci, Angela Scrascia, Paride Papadia, Barbara Federica Scremin, Elvio Carlino, Cinzia Giannini, Cosimino Malitesta, Marco Mazzeo, Giuseppe Gigli and Giuseppe Ciccarella/titolo:Nonhydrolytic Route to Boron-Doped TiO2 Nanocrystals/doi:10.1002%2Fejic.201200842/rivista:European journal of inorganic chemistry (Internet)/anno:2012/pagina_da:364/pagina_a:374/intervallo_pagine:364–374/volume:2013 |
| DOI: | 10.1002/ejic.201200842 |
| Popis: | A simple synthesis was applied and tested for the preparation of boron-doped titanium dioxide [TiO2(B)] nanocrystals using titanium tetraisopropoxide (TTIP) together with boric acid (H3BO3) and benzyl alcohol as reaction solvent. Changes in the TTIP/H3BO3 molar ratio allowed a scalable synthetic protocol with a significant B-dopant control. In particular, this approach does not need surfactants or a final calcination step. X-ray diffractometry (XRD), low- and high-resolution transmission electron microscopy (TEM and HRTEM), and micro Raman spectroscopy revealed that the TiO2 nanocrystals produced have diameters up to about 10 nm and are mainly of the anatase phase but that a brookite phase was progressively formed with increased dopant level. The amount of boron was measured by inductively coupled plasma atomic emission spectroscopy (ICP-AES), and the presence of boron inside the crystals was determined by 11B cross-polarized magic-angle spinning nuclear magnetic resonance (11B CP-MAS NMR) spectroscopy. X-ray photoelectron spectroscopy (XPS) revealed the presence of boron on the nanocrystal surfaces, confirming the trend in the dopant concentration already observed with ICP-AES elemental analysis. Microphotoluminescence studies indicated the formation of three different typical luminescent defect states in correlation with the amount of added boron in the titania. UV/Vis absorption spectra showed a boron-dependent redshift of the absorption edge. |
| Databáze: | OpenAIRE |
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