نتایج جستجو برای: anatase phase

تعداد نتایج: 601378  

Journal: :Chemical communications 2012
Ioannis Tamiolakis Ioannis N Lykakis Alexandros P Katsoulidis Gerasimos S Armatas

We report an unprecedented formation of mesoporous titania via a surfactant-assisted aggregating assembly of TiO(2) nanoparticles. These mesostructures possess a highly crystalline anatase phase, large and accessible pore surface area, and exhibit superior photocatalytic performance.

Journal: :Chemical communications 2008
Chenghua Sun Nuanxia Wang Shiyi Zhou Xiujie Hu Shuyun Zhou Ping Chen

Via the combination of an electrospinning method with a hydrothermal reaction, a large-scale cedar-like hierarchical nanostructured TiO(2) film with an anatase/rutile composite phase was fabricated.

Journal: :Nanoscale 2014
N Kränzlin M Staniuk F J Heiligtag L Luo H Emerich W van Beek M Niederberger D Koziej

We use in situ X-ray absorption and diffraction studies to directly monitor the crystallization of different titania polymorphs in one and the same solution. We find that, despite the commonly accepted polymorphic-crossover from anatase to rutile triggered by the critical size of nanoparticles, in the solution their respective nucleation and growth are independent processes. Moreover, we find t...

Journal: :Small 2011
Pierre Kubiak Thomas Fröschl Nicola Hüsing Ute Hörmann Ute Kaiser Renate Schiller Clemens K Weiss Katharina Landfester Margret Wohlfahrt-Mehrens

Nanocrystalline anatase TiO(2) materials with different specific surface areas and pore size distributions are prepared via sol-gel and miniemulsion routes in the presence of surfactants. The samples are characterized by X-ray diffraction, nitrogen sorption, transmission electron microscopy, and electrochemical measurements. The materials show a pure anatase phase with average crystallite size ...

Journal: :Scientific reports 2016
Shoyebmohamad F Shaikh Rajaram S Mane Byoung Koun Min Yun Jeong Hwang Oh-shim Joo

Using a simple hydrothermal synthesis, the crystal structure of TiO2 nanoparticles was controlled from rutile to anatase using a sugar alcohol, D-sorbitol. Adding small amounts of D-sorbitol to an aqueous TiCl4 solution resulted in changes in the crystal phase, particle size, and surface area by affecting the hydrolysis rate of TiCl4. These changes led to improvements of the solar-to-electrical...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2012
Dieqing Zhang Meicheng Wen Peng Zhang Jian Zhu Guisheng Li Hexing Li

Porous anatase TiO(2) single crystal architectures with large specific surface area and remarkable crystalline phase-stability were fabricated via a green microwave-assisted process. Ionic liquid was chosen as both an essential structure-directing agent for the formation of the {001} facets exposed TiO(2) and an etching agent source for selective erosion of the exposed {001} facets, leading to ...

2014
R. Govindaraj M. Senthil Pandian P. Ramasamy Sumita Mukhopadhyay

Anatase phase TiO2 nanostructures (Nanoparticles and nanorods) were prepared by two different methods. The prepared samples were characterized with Powder X-ray diffraction (PXRD), Field emission scanning electron microscopy (FESEM), High resolution transmission electron microscopy (HRTEM), Brunauer-Emmett-Teller (BET) method and Barrett-Joyner-Halenda (BJH) analysis. The PXRD pattern shows tha...

2012
Porun Liu Yun Wang Haimin Zhang Zhiyong Tang Huijun Zhao

© 2012 Wiley-VCH Verlag Gm DOI: 10.1002/smll.201200971 For the fi rst time, a facile, one-pot hydrofl uoric acid vapor-phase hydrothermal (HF-VPH) method is demonstrated to directly grow single-crystalline anatase TiO 2 nanosheets with 98.2% of exposed {001} faceted surfaces on the Ti substrate via a distinctive two-stage formation mechanism. The fi rst stage produces a new intermediate crystal...

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