Journal
CRYSTENGCOMM
Volume 14, Issue 22, Pages 7672-7679Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ce25827g
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Funding
- National Basic Research Program of China [2012CB932303]
- innovation project of the Chinese Academy of Sciences [KJCX2-YW-H2O]
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Nitrogen doping is a promising method to enhance the visible light absorption and photo-catalytic activity of TiO2. A new method is reported for the synthesis of nitrogen self-doped rutile TiO2 nanorods, along with the formation study of V-shaped N-doped TiO2 nanorods, using TiN as a precursor and using a hydrothermal method. Our synthesis method gives a facile and easy way to control nitrogen doping in a TiO2 lattice. Two types of the V-shaped nanorods, with a (101) coherent boundary of either 114.4 degrees or 134.9 degrees inner angle, were observed. The N-doped TiO2 nanorods exhibit an enhanced visible light absorption and red-shift in band gap in comparison with pure rutile TiO2 nanopowders. The mechanisms of N doping and the formation of the V-shaped nanorods are analyzed and discussed. The oriented attachment and Ostwald ripening are considered responsible for the formation and growth of the straight and V-shaped N-doped TiO2 nanorods(.)
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