TY - JOUR
T1 - Ce2S3 decorated ZnO-ZnS core-shell nanorod arrays
T2 - Efficient solar-driven photocatalytic properties
AU - Ranjith, K. S.
AU - Saravanan, P.
AU - Vinod, V. T.P.
AU - Filip, Jan
AU - Černík, Miroslav
AU - Rajendra Kumar, R. T.
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - We demonstrate a facile synthesis of vertically aligned Ce2S3 decorated ZnO-ZnS and ZnO-ZnS-Ce2S3 core-shell nanorod (NR) arrays via simple two-step process: aqueous solution growth and sulfidation. By controlling the sulfidation time, ZnS nuclei were formed at the initial stage of sulfidation. Upon increasing the sulfidation time, Ce2S3 nanoparticles with an average size of ∼5 nm are decorated over the ZnO-ZnS core shell NR arrays, followed by, ZnO-ZnS-Ce2S3 core-shell ternary heterostructures. FESEM, HRTEM, EDX, XRD and XPS analyses revealed that the interior cores and exterior shells of the as-prepared hetero-nanorods comprised of single-crystal wurtzite-type ZnO and polycrystalline wurtzite ZnS, respectively, with a large quantity of Ce2S3 NPs inlaid over the ZnS shell. Photocatalytic behavior of the Ce2S3 decorated ZnO-ZnS hybrid photocatalyst was studied by means of photodegradation of methylene blue (MB) under visible irradiation. Ce2S3 decorated ZnO-ZnS hybrid structures show an enhanced photodegradation rate of nearly 2.8, 1.3 and 2.5 times higher than that of the bare ZnO, ZnO-ZnS and ZnO-ZnS-Ce2S3, which is attributed to the increase in the light absorption in visible region, electron-hole separation at the ZnO-ZnS and ZnS-Ce2S3 interfaces.
AB - We demonstrate a facile synthesis of vertically aligned Ce2S3 decorated ZnO-ZnS and ZnO-ZnS-Ce2S3 core-shell nanorod (NR) arrays via simple two-step process: aqueous solution growth and sulfidation. By controlling the sulfidation time, ZnS nuclei were formed at the initial stage of sulfidation. Upon increasing the sulfidation time, Ce2S3 nanoparticles with an average size of ∼5 nm are decorated over the ZnO-ZnS core shell NR arrays, followed by, ZnO-ZnS-Ce2S3 core-shell ternary heterostructures. FESEM, HRTEM, EDX, XRD and XPS analyses revealed that the interior cores and exterior shells of the as-prepared hetero-nanorods comprised of single-crystal wurtzite-type ZnO and polycrystalline wurtzite ZnS, respectively, with a large quantity of Ce2S3 NPs inlaid over the ZnS shell. Photocatalytic behavior of the Ce2S3 decorated ZnO-ZnS hybrid photocatalyst was studied by means of photodegradation of methylene blue (MB) under visible irradiation. Ce2S3 decorated ZnO-ZnS hybrid structures show an enhanced photodegradation rate of nearly 2.8, 1.3 and 2.5 times higher than that of the bare ZnO, ZnO-ZnS and ZnO-ZnS-Ce2S3, which is attributed to the increase in the light absorption in visible region, electron-hole separation at the ZnO-ZnS and ZnS-Ce2S3 interfaces.
KW - CeS decorated nanostructures
KW - Ternary heterostructure
KW - Vertically aligned core-shell nanorod arrays
KW - Visible photocatalysis
KW - ZnO-ZnS core shell arrays
UR - http://www.scopus.com/inward/record.url?scp=84971595609&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2016.05.011
DO - 10.1016/j.cattod.2016.05.011
M3 - Article
AN - SCOPUS:84971595609
SN - 0920-5861
VL - 278
SP - 271
EP - 279
JO - Catalysis Today
JF - Catalysis Today
ER -