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. 2017 Nov 27;7(1):16396.
doi: 10.1038/s41598-017-16732-4.

Preparation of ZnS@In2S3 Core@shell Composite for Enhanced Photocatalytic Degradation of Gaseous o-Dichlorobenzene under Visible Light

Baojun Liu  1   2 , Xia Hu  1 , Xinyong Li  3 , Ying Li  2 , Chang Chen  2 , Kwok-Ho Lam  4
Affiliations

Preparation of ZnS@In2S3 Core@shell Composite for Enhanced Photocatalytic Degradation of Gaseous o-Dichlorobenzene under Visible Light

Baojun Liu et al. Sci Rep. .

Abstract

In this study, novel ZnS@In2S3 core@shell hollow nanospheres were fabricated by a facile refluxing method for the first time, and the formation mechanism of hollow structure with interior architecture was discussed based on ion-exchange Ostwald ripening. As the photocatalytic material for degradation of gaseous o-Dichlorobenzene (o-DCB), the as-synthesized core@shell hollow nanospheres were found to show significantly enhanced catalytic performance for effective separation of photo-generated charges. Moreover, the mechanisms of enhanced activity were elucidated by band alignment and unique configuration. Such photocatalyst would meet the demands for the control of persistent organic pollutant (POPs) in the atmospheric environment.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Figure 1
Figure 1
(a,b) SEM, (inset of (a)) photograph, and (c,d) TEM images of pure ZnS spheres.
Figure 2
Figure 2
(a,b) SEM, (inset of (a)) photograph, (c–e) TEM and (f) HRTEM images of ZnS@In2S3 core@shell hollow spheres.
Figure 3
Figure 3
Schematic growth mechanism of the ZnS@In2S3 core@shell hollow spheres.
Figure 4
Figure 4
XRD patterns of pure ZnS and ZnS@In2S3 core@shell hollow spheres.
Figure 5
Figure 5
XPS spectra of ZnS@In2S3 core@shell hollow spheres: (a) survey of the sample, (b) Zn 2p spectrum, (c) In 3d spectrum, (d) S 2p spectrum.
Figure 6
Figure 6
(a) UV-vis DRS and (b) Tauc’s plot of the obtained samples, respectively; (c) N2 adsorption/desorption isotherms and (d) pore size distribution of the as-prepared ZnS@In2S3 core@shell hollow spheres.
Figure 7
Figure 7
(a) Photocatalytic degradation and (b) kinetic curves for degradation of gaseous o-DCB over the obtained materials, respectively.
Figure 8
Figure 8
(a) In situ FTIR spectra in the different wavenumber regions, (b) their corresponding time-domain IR spectra, and (c) Schematic mechanism for gaseous o-DCB degradation over ZnS@In2S3 core-shell spheres.
See this image and copyright information in PMC

References

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