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Issue 14, 2017
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New insight into binary TiO2@C nanocomposites: the crucial effect of an interfacial microstructure

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Abstract

Combining with carbon materials is a common and efficient strategy to improve the photocatalytic performance of TiO2. But the fundamental nature of the interfacial microstructures between carbon and TiO2 and how they affect the photocatalysis process remain controversial. In this work, hybrid TiO2@C nanocomposites with different carbon contents are synthesized. It is found that an interfacial disorder region with interfacial Ti–O–C bonds and abundant defects (oxygen vacancies, VO) can be generally formed from the chemical interactions between carbon and Ti–O–Ti skeletons. These interfacial VO sites are well stabilized by the carbon complex coating, and maintain their intrinsic nature in visible light absorption and electron trapping. Moreover, the synergistic effect of interfacial bonding, defective sites and the components on the visible photocatalysis of TiO2@C composites has been carefully investigated, and a corresponding mechanism is also proposed.

Graphical abstract: New insight into binary TiO2@C nanocomposites: the crucial effect of an interfacial microstructure

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Publication details

The article was received on 06 Jan 2017, accepted on 17 Mar 2017 and first published on 20 Mar 2017


Article type: Paper
DOI: 10.1039/C7CP00098G
Citation: Phys. Chem. Chem. Phys., 2017,19, 9519-9527
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    New insight into binary TiO2@C nanocomposites: the crucial effect of an interfacial microstructure

    J. Zhuang, Q. Tian, Q. Liu, P. Liu, X. Cui, Y. Li and M. Fan, Phys. Chem. Chem. Phys., 2017, 19, 9519
    DOI: 10.1039/C7CP00098G

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