Ultrafast one-step synthesis of N and Ti3+ codoped TiO2 nanosheets via energetic material deflagration

Research Article

Abstract

An energetic-material (NaN3) deflagration method for preparing N- and Ti3+-codoped TiO2 nanosheets (NT–TiO2) was developed. In this method, N radicals filled the crystal lattice, and Na clusters captured partial O from TiO2. The deflagration process was fast and facile and can be completed within < 1 s after ignition. The obtained NT–TiO2 exhibited rough surfaces with nanopits and nanoholes. The doping concentration can be regulated by controlling the NaN3 addition. The NT–TiO2 samples showed significant enhancements in the visible-light absorption and photoelectric response. The simultaneously produced N radicals and Na clusters from NaN3 deflagration served as N sources and reduction agents, respectively. Additionally, the high deflagration temperature/pressure improved the reactivity of N radicals and Na clusters. Thus, the present NaN3 deflagration method was demonstrated as an ultrafast and effective approach to fabricate NT–TiO2 with a visible-light response. The proposed NaN3 deflagration method allows the ultrafast synthesis of new functional materials via the efficient deflagration of energetic materials.

Keywords

NaN3 deflagration N radicals and Na nanoclusters ultrafast doping Ti3+ codoped TiO2 visible-light response 

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Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 11272292, 11372288, 11502242, 51402269 and 11502247), Development Foundation of CAEP (No. 2014B0302041), the Applied Basic Research Program of Sichuan Province (No. 2015JY0229), the Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials (No. 14zxfk08) and China Postdoctoral Science Foundation (No. 2016M592702).

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Ultrafast one-step synthesis of N and Ti3+ codoped TiO2 nanosheets via energetic material deflagration

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Chemical MaterialsChina Academy of Engineering PhysicsMianyangChina
  2. 2.TU-NIMS Joint Research Center, School of Materials Science and EngineeringTianjin UniversityTianjinChina
  3. 3.Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyangChina
  4. 4.Key Laboratory of Mesoscopic Chemistry of MOE and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical EngineeringNanjing UniversityNanjingChina

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