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Surface effects on the optical and photocatalytic properties of graphene-like ZnO:Eu3+ nanosheets
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10.1063/1.4776225
/content/aip/journal/jap/113/3/10.1063/1.4776225
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/3/10.1063/1.4776225
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

XRD patterns of UZO, ZEO-2, ZEO-4, and ZEO-8. The inset shows the magnified patterns in the vicinity of 30° ∼ 40°.

Image of FIG. 2.
FIG. 2.

SEM images of UZO (a), ZEO-2 (b), ZEO-4 (c), and ZEO-8 (d).

Image of FIG. 3.
FIG. 3.

EDS spectra of UZO (a), ZEO-2 (b), ZEO-4 (c), and ZEO-8 (d).

Image of FIG. 4.
FIG. 4.

TEM and HRTEM images of ZEO-8. (a) TEM image; (b) high-magnification TEM image corresponding to the wrinkle region marked by red dot ring (R1) in (a); (c) HRTEM image corresponding to the region marked by the red dot ring in (b); (d) high-magnification TEM image corresponding to the edge region marked by red dot ring (R2) in (a); (e) HRTEM image corresponding to the region marked by the small red dot rectangle in (d); (f) HRTEM image corresponding to the region marked by the blue dot rectangle in (d).

Image of FIG. 5.
FIG. 5.

XPS spectrum of ZEO-8. (a) XPS survey spectrum; (b) Zn 2p3/2 and Zn 2p1/2 XPS spectrum; (c) O1s XPS spectrum where two components (green curves) were used to deconvolute the experimental peak; (d) Eu 3d5/2 and Eu 3d3/2 XPS spectrum.

Image of FIG. 6.
FIG. 6.

(a) Room temperature PL spectra of UZO, ZEO-2, ZEO-4, and ZEO-8; (b)excitation spectrum of ZEO-8; (c) visible light region of PL spectra with UV peak normalization; the inset illustrates the intensities of both green and red emissions via the mole ratio of Zn2+:urea.

Image of FIG. 7.
FIG. 7.

(a) Schematic illustrating the proposed mechanism of energy transfer from the ZnO host to the Eu3+ ions. The dashed and the solid lines with arrows represent nonradiative and radiative processes, respectively; (b) schematic illustrating the proposed variation of energy transfer process with different power excitation.

Image of FIG. 8.
FIG. 8.

Excitation power dependence of the room-temperature PL spectra of ZEO-8.

Image of FIG. 9.
FIG. 9.

Green (a) and red (b) emission intensities and UV wavelength (c) as a function of excitation power density.

Image of FIG. 10.
FIG. 10.

Degradation efficiency of ZEO-8 for RhB dye versus reaction time.

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/content/aip/journal/jap/113/3/10.1063/1.4776225
2013-01-17
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Surface effects on the optical and photocatalytic properties of graphene-like ZnO:Eu3+ nanosheets
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/3/10.1063/1.4776225
10.1063/1.4776225
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