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

作者：Liu, Yousong; Ouyang, Shuxin^*; Guo, Wencan; Zong, Hehou; Cui, Xudong; Jin, Zhong^*; Yang, Guangcheng^*

来源：Nano Research, 2018, 11(9): 4735-4743.

DOI：10.1007/s12274-018-2058-0

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

An energetic-material (NaN 3) 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.

• 出版日期2018-9
• 单位中国工程物理研究院; 中国工程物理研究院流体物理研究所; 南京大学; 天津大学