Continuous flow hydrothermal synthesis of phase pure rutile TiO2 nanoparticles with a rod-like morphology

被引:20
作者
Beyer, Jonas [1 ]
Mamakhel, Aref [1 ]
Sondergaard-Pedersen, Frederik [1 ]
Yu, Jinlong [1 ]
Iversen, Bo Brummerstedt [1 ]
机构
[1] Aarhus Univ, Ctr Mat Crystallog, Dept Chem, DK-8000 Aarhus C, Denmark
基金
新加坡国家研究基金会;
关键词
SYNCHROTRON X-RAY; NANOSIZE RUTILE; ANATASE; WATER; SIZE; OXIDE; CRYSTALLIZATION; REFINEMENT; PARTICLES; INSERTION;
D O I
10.1039/c9nr09069j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Titania nanocrystals are used in numerous applications but specific polymorphs (anatase, rutile, brookite) are typically required in specific applications making synthesis control over the crystal phase essential. Supercritical continuous flow reactors constitute fast, scalable alternatives to conventional autoclave hydrothermal synthesis. They provide outstanding control over nanoparticle characteristics such as size, crystallinity, and morphology but previous studies have always resulted in anatase products. Here we report, for the first time, a continuous hydrothermal flow method for obtaining phase pure rutile nano-particles thereby significantly broadening the crystal design space for large scale titania applications. Through variation of the reactor temperature, the dimensions of the rod-like rutile crystallites are tunable in a range of 35 to 60 nm in length and 10 to 35 nm in width (maximum aspect ratio of similar to 3.5) leading to a tunable band gap (3.2-3.5 eV) and high specific surface areas exceeding 200 m(2) g(-1).
引用
收藏
页码:2695 / 2702
页数:8
相关论文
共 53 条
[1]   Hydrothermal synthesis of metal oxide nanoparticles at supercritical conditions [J].
Adschiri, T ;
Hakuta, Y ;
Sue, K ;
Arai, K .
JOURNAL OF NANOPARTICLE RESEARCH, 2001, 3 (2-3) :227-235
[2]   RAPID AND CONTINUOUS HYDROTHERMAL CRYSTALLIZATION OF METAL-OXIDE PARTICLES IN SUPERCRITICAL WATER [J].
ADSCHIRI, T ;
KANAZAWA, K ;
ARAI, K .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (04) :1019-1022
[3]   Size and Size Distribution Control of γ-Fe2O3 Nanocrystallites: An in Situ Study [J].
Andersen, Henrik L. ;
Jensen, Kirsten M. O. ;
Tyrsted, Christoffer ;
Bojesen, Espen D. ;
Christensen, Mogens .
CRYSTAL GROWTH & DESIGN, 2014, 14 (03) :1307-1313
[4]   Nanosize rutile titania particle synthesis via a hydrothermal method without mineralizers [J].
Aruna, ST ;
Tirosh, S ;
Zaban, A .
JOURNAL OF MATERIALS CHEMISTRY, 2000, 10 (10) :2388-2391
[5]   Review of supercritical fluids in inorganic materials science [J].
Aymonier, Cyril ;
Loppinet-Serani, Anne ;
Reveron, Helen ;
Garrabos, Yves ;
Cansell, Francois .
JOURNAL OF SUPERCRITICAL FLUIDS, 2006, 38 (02) :242-251
[6]   Prediction of TiO2 nanoparticle phase and shape transitions controlled by surface chemistry [J].
Barnard, AS ;
Curtiss, LA .
NANO LETTERS, 2005, 5 (07) :1261-1266
[7]   RUTILE-TYPE COMPOUNDS .4. SIO2, GEO2 AND A COMPARISON WITH OTHER RUTILE-TYPE STRUCTURES [J].
BAUR, WH ;
KHAN, AA .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL CRYSTALLOGRAPHY AND CRYSTAL CHEMISTRY, 1971, B 27 (NOV15) :2133-&
[8]  
Bertolotti F, 2016, NAT MATER, V15, P987, DOI [10.1038/NMAT4661, 10.1038/nmat4661]
[9]   Certification of Standard Reference Material 660B [J].
Black, David R. ;
Windover, Donald ;
Henins, Albert ;
Filliben, James ;
Cline, James P. .
POWDER DIFFRACTION, 2011, 26 (02) :155-158
[10]   Time-Resolved In Situ Synchrotron X-ray Study and Large-Scale Production of Magnetite Nanoparticles in Supercritical Water [J].
Bremholm, Martin ;
Felicissimo, Marcella ;
Iversen, Bo B. .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2009, 48 (26) :4788-4791