Synthesis of recrystallized anatase TiO2 mesocrystals with Wulff shape assisted by oriented attachment

被引：64

作者：

Da Silva, Rafael O. ^{[1
]}

Goncalves, Ricardo H. ^{[1
]}

Stroppa, Daniel G. ^{[2
,3
]}

Ramirez, Antonio J. ^{[2
]}

Leite, Edson R. ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Chem, BR-13560 Sao Carlos, SP, Brazil

[2] Brazilian Synchrotron Light Lab, BR-13083970 Campinas, SP, Brazil

[3] Univ Estadual Campinas, Sch Mech Engn, Dept Mat Engn, BR-13083860 Campinas, SP, Brazil

来源：

NANOSCALE | 2011年 / 3卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

PREFORMED TITANIA NANOCRYSTALS; 001; FACETS; TRANSFORMATION; PERCENTAGE; MORPHOLOGY; NANOSHEETS; ROUTES; OXIDE;

D O I：

10.1039/c0nr01016b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, we describe a kinetically controlled crystallization process assisted by an oriented attachment (OA) mechanism based on a nonaqueous sol-gel synthetic method (specifically, the reaction of titanium(IV) chloride (TiCl4) with n-octanol) to prepare re-crystallized anatase TiO2 mesocrystals (single crystal). The kinetics study revealed a multi-step and hierarchical process controlled by OA, and a high resolution transmission electron microscopy (HRTEM) analysis clearly shows that the synthesized mesocrystal presents a truncated bipyramidal Wulff shape, indicating that its surface is dominated by {101} facets. This shape is developed during the recrystallization step. The material developed here displayed superior photocatalytic activity under visible light irradiation compared to TiO2-P25 as a benchmarking.

引用

页码：1910 / 1916

页数：7

共 33 条

[1] Molecular Dynamics Simulation of the Aggregation of Titanium Dioxide Nanocrystals: Preferential Alignment [J].

Alimohammadi, Mozhgan ;

Fichthorn, Kristen A. .

NANO LETTERS, 2009, 9 (12) :4198-4203

[2] Decahedral Single-Crystalline Particles of Anatase Titanium(IV) Oxide with High Photocatalytic Activity [J].

Amano, Fumiaki ;

Prieto-Mahaney, Orlando-Omar ;

Terada, Yoshihiro ;

Yasumoto, Taikei ;

Shibayama, Tamaki ;

Ohtani, Bunsho .

CHEMISTRY OF MATERIALS, 2009, 21 (13) :2601-2603

[3]

COLFEN H, 2008, MESOCRYSTALS NONCLAS, P84

[4] The surface science of titanium dioxide [J].

Diebold, U .

SURFACE SCIENCE REPORTS, 2003, 48 (5-8) :53-229

[5] Preparation and characterization of nanosized titania sensing film [J].

Ferroni, M ;

Carotta, MC ;

Guidi, V ;

Martinelli, G ;

Ronconi, F ;

Sacerdoti, M ;

Traversa, E .

SENSORS AND ACTUATORS B-CHEMICAL, 2001, 77 (1-2) :163-166

[6] Organic chemistry in inorganic nanomaterials synthesis [J].

Garnweitner, Georg ;

Niederberger, Markus .

JOURNAL OF MATERIALS CHEMISTRY, 2008, 18 (11) :1171-1182

[7] Molecular photovoltaics [J].

Hagfeldt, A ;

Grätzel, M .

ACCOUNTS OF CHEMICAL RESEARCH, 2000, 33 (05) :269-277

[8] Symmetry and shape issues in nanostructure growth [J].

Halder, Aditi ;

Kundu, Paromita ;

Viswanath, B. ;

Ravishankar, N. .

JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (23) :4763-4772

[9] Synthesis of Titania Nanosheets with a High Percentage of Exposed (001) Facets and Related Photocatalytic Properties [J].

Han, Xiguang ;

Kuang, Qin ;

Jin, Mingshang ;

Xie, Zhaoxiong ;

Zheng, Lansun .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (09) :3152-+

[10]

LAZZERI M, 2002, CONDENS MATTER MAT P, V65

← 1 2 3 4 →