Nonhydrolytic Route to Boron-Doped TiO2 Nanocrystals

被引：20

作者：

Xu, Hua ^{[1
]}

Picca, Rosaria Anna ^{[2
]}

De Marco, Luisa ^{[3
]}

Carlucci, Claudia ^{[1
,4
]}

Scrascia, Angela ^{[5
]}

Papadia, Paride ^{[6
]}

Scremin, Barbara Federica ^{[7
]}

Carlino, Elvio ^{[8
]}

Giannini, Cinzia ^{[9
]}

Malitesta, Cosimino ^{[2
]}

Mazzeo, Marco ^{[1
,10
]}

Gigli, Giuseppe ^{[1
,3
,10
]}

Ciccarella, Giuseppe ^{[1
,4
]}

机构：

[1] CNR, Ist Nanosci, Natl Nanotechnol Lab, I-73100 Lecce, Italy

[2] Univ Salento, Dipartimento Sci Mat, I-73100 Lecce, Italy

[3] Italian Inst Technol, Ctr Biomol Nanotechnol, I-73010 Arnesano, LE, Italy

[4] Univ Salento, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy

[5] Univ Salento, Scuola Super ISUFI, I-73100 Lecce, Italy

[6] Univ Salento, Dipartimento Sci & Tecnol Biol & Ambientali, I-73100 Lecce, Italy

[7] CNR, Dipartimento Mat & Dispositivi, I-16152 Genoa, Italy

[8] CNR, IOM, Lab TASC, Area Sci Pk Basovizza, I-34149 Trieste, Italy

[9] CNR, IC, I-70126 Bari, Italy

[10] Univ Salento, Dipartimento Matemat & Fis Ennio De Giorgi, I-73100 Lecce, Italy

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2013年 / 03期

关键词：

Nanocrystals; Titanium dioxide; Boron; Doping; Crystal engineering; PHOTOCATALYTIC ACTIVITY; VISIBLE-LIGHT; RANGE ORDER; ANATASE; TEMPERATURE; TITANIA; PHOTOLUMINESCENCE; PERFORMANCE; RESONANCE; B2O3;

D O I：

10.1002/ejic.201200842

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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 B-11 cross-polarized magic-angle spinning nuclear magnetic resonance (B-11 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.

引用

页码：364 / 374

页数：11

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