期刊
CRYSTENGCOMM
卷 20, 期 45, 页码 7329-7336出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ce01303a
关键词
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资金
- Natural Science Foundation of China [51502163]
- Keypoint Research and Invention in Shaanxi Province of China [2017GY-186]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
This paper introduces the in situ topotactic synthesis of a porous network Zn2Ti3O8 platelike nanoarchitecture via using layered H1.07Ti1.73O4 H 2O (HTO) as the precursor. The introduction of H2O2 in the interlayer of HTO leads to access of more Zn2+ ions into the interlayers and the formation of the Zn2+ ion-exchanged product with a Zn/Ti molar ratio of 1.07:1.73 during ion exchange. This ion-exchanged product is in situ topotactically transformed into a Zn2Ti3O8 nanoarchitecture after heat-treatment, and the [110]-crystal-axis of the Zn2Ti3O8 nanoarchitecture is vertical to the basal plane of the 2D nanoarchitecture. The H2O2 molecule within the ion-exchanged product decomposes and escapes due to heat-treatment, resulting in the formation of a porous network structure similar to a sponge. The pore size is about 10-20 nm. Moreover, the electrochemical investigation indicates that such a porous network Zn2Ti3O8 nanoarchitecture as a Li-ion battery anode has a reversible capacity of 423 mA h g(-1) during the 100th cycle at a current density of 100 mA g(-1). It is wondrous that at a current density of 1 Ag-1 during 1000 cycles, its reversible capacity still remains at 408 mA h g(-1).
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