Journal of Materials Research
November 2005— Volume 20, Number 11

View Complete Issue

Synthesis of nitrogen-doped titanium oxide nanostructures via a surfactant-free hydrothermal route Chang Houn Rhee and Jae Sung Lee Pohang University of Science and Technology (POSTECH), Pohang 790-784, Republic of Korea Soo Hyun Chung Korea Institute of Energy Research, Daejon 305-343, Republic of Korea

Nitrogen-doped titanium oxides nanostructures were synthesized by a new method proposed here from titanium oxysulfate precursor in a NH₄OH solution under hydrothermal conditions without any extra templates as structure driving agents. The material synthesized with NH₄OH was an ammonium titanate and showed curled nanosheets, nanofibers or nanorods morphologies depending on the molar ratio of NH₄OH to titanium precursor and the hydrothermal temperature. The nanofibrous titanates had a high surface area over 500 m² g^-1 and a pore volume of 0.72 cm³ g^-1. The calcination of as-synthesized material at 673 K produced a titanium oxynitride TiO_2-xN_x with anatase phase, which absorbed visible light. Ion exchange of ammonium ion of the titanate with sodium Na₂Ti₃O_7-xN_x enhanced the thermal stability of the titanate phase.

© 2005 MRS

Home •  News • Society Information •  Site Map • Comments • Search  • Contacts Meetings • Membership • Publications • Marketing Opportunities • Materials Connections Search the Site ©1995-2005 Materials Research Society 506 Keystone Drive Warrendale PA 15086-7573 USA Phone: 724.779.3003, Fax: 724.779.8313 General Information: Web site comments/questions: