Control synthesis of rutile TiO2 microspheres, nanoflowers, nanotrees and nanobelts via acid-hydroth.pdfVIP

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Control synthesis of rutile TiO2 microspheres, nanoflowers, nanotrees and nanobelts via acid-hydroth.pdf

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Control synthesis of rutile TiO2 microspheres, nanoflowers, nanotrees and nanobelts via acid-hydroth

Dynamic Article LinksCCrystEngComm Cite this: DOI: 10.1039/c1ce05186e /crystengcomm PAPER D o w n l o a d e d b y S H A N D O N G U N I V E R S I T Y o n 2 7 J u n e 2 0 1 1 P u b l i s h e d o n 1 2 M a y 2 0 1 1 o n h t t p : / / p u b s .r s c .o r g | d o i : 1 0 .1 0 3 9 / C 1 C E 0 5 1 8 6 E View OnlineControl synthesis of rutile TiO2 microspheres, nanoflowers, nanotrees and nanobelts via acid-hydrothermal method and their optical properties? Weijia Zhou, Xiaoyan Liu, Jingjie Cui, Duo Liu, Jing Li, Huaidong Jiang, Jiyang Wang* and Hong Liu* Received 9th February 2011, Accepted 1st April 2011 DOI: 10.1039/c1ce05186eSemiconductor rutile TiO2 nanostructures with a diversity of well-defined morphologies, such as microspheres, nanoflowers, nanotrees and nanobelts, are synthesized via an acid-hydrothermal process without any structure-directing agents. Their morphologies, crystal structures and orientation relationship were characterized by X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy. By controlling hydrochloric acid concentration, anisotropic growth of the rutile TiO2 leads to various morphologies. The synthesis mechanism of rich TiO2 nanostructures was also studied. Finally, the relationship between optical properties and the structural complexity of the rutile TiO2 nanocrystals was characterized.Introduction Design and growth of inorganic nanostructures with controlled size and morphologies has been the focus of intensive research on both relevant theories and technologies in recent years owing to the wide range of electrical and optical properties.1–4 Chemical vapor deposition (CVD),5 application of templates,6 catalysts7 and electrochemical methods8 are general synthesis routes to direct the growth of inorganic material with controlled morphologies and architectures. In addition to the above methods, the simple solution synthesis approaches by hydro- thermal treatment have become a promisin