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Diethylenediamine-assisted template-free synthesis of a hierarchical TiO2 sphere-in-sphere with enhanced photocatalytic performance

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Abstract

With the assistance of diethylenediamine (DETA), a template-free solvothermal approach is employed to one-step synthesize a hierarchical TiO2 sphere-in-sphere, which has a unique structure: an interior nanosized sphere is contained in the cavity of another hollow microsphere, and numerous nanosheets of width ca. 20–26 nm vertically distribute on the surface. It is proved that DETA added in solution plays an important inducing role in the formation of both the hollow sphere-in-sphere structure and surface sheet-assembled network. Therefore, a DETA-assisted formation mechanism of the hierarchical TiO2 sphere-in-sphere has been described in detail. The unique hierarchical sphere-in-sphere structure endows the TiO2 product with increasing light-harvesting efficiency and specific surface area, resulting in its enhanced photocatalytic activity for the degradation of various organic pollutants under the illumination of UV light.

Graphical abstract: Diethylenediamine-assisted template-free synthesis of a hierarchical TiO2 sphere-in-sphere with enhanced photocatalytic performance

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Publication details

The article was received on 29 Aug 2018, accepted on 26 Sep 2018 and first published on 16 Oct 2018


Article type: Paper
DOI: 10.1039/C8DT03503B
Citation: Dalton Trans., 2018, Advance Article
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    Diethylenediamine-assisted template-free synthesis of a hierarchical TiO2 sphere-in-sphere with enhanced photocatalytic performance

    X. Yang, H. Peng, Z. Zou, P. Zhang, X. Zhai, Y. Zhang, C. Liu, L. Dan and J. Gui, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT03503B

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