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Interfacial effects of MnOx-loaded TiO2 with exposed {001} facets and its catalytic activity for the photoreduction of CO2

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Abstract

Herein, anatase TiO2 with different percentages of exposed {001} and {101} facets was prepared, and subsequently, Ag and MnOx were co-loaded on these TiO2 facets through a classical photodeposition method; the loaded TiO2 samples were labeled as Ag–TiO2–MnOx (N%), where N% denotes the percentage of the exposed {001} facets. The as-prepared samples were analyzed via scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectroscopy (DRS), and the photocatalytic reduction of CO2 was carried out. The results showed that Ag–TiO2–MnOx (40%) exhibited the highest photocatalytic activity among the other dual-loaded samples and pure TiO2. The XPS spectra demonstrated that Ti–O–Mn and Ti–O–H bonds were formed at the interfaces of the cocatalyst-TiO2. The PL and VB spectra revealed that the chemical bond (Ti–O–Mn) at the Ag–TiO2–MnOx (40%) interface greatly increased the hole mobility rate and the photoinduced carrier separation efficiency that resulted in higher catalytic activity for the photoreduction of CO2.

Graphical abstract: Interfacial effects of MnOx-loaded TiO2 with exposed {001} facets and its catalytic activity for the photoreduction of CO2

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Publication details

The article was received on 13 Apr 2017, accepted on 31 May 2017 and first published on 01 Jun 2017


Article type: Paper
DOI: 10.1039/C7CY00729A
Citation: Catal. Sci. Technol., 2017, Advance Article
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    Interfacial effects of MnOx-loaded TiO2 with exposed {001} facets and its catalytic activity for the photoreduction of CO2

    Z. Jiang, D. Ding, L. Wang, Y. Zhang and L. Zan, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY00729A

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