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Efficient Solar Light Driven Photocatalytic Degradation of Congo Red Dye on CdS Nanostructures Derived from Single Source Precursor

Nasir, JA; Gul, S; Khan, A; Shah, ZH; Ahmad, A; Zulfiqar, ; Khan, R; ... Zia-ur-Rehman, ; + view all (2018) Efficient Solar Light Driven Photocatalytic Degradation of Congo Red Dye on CdS Nanostructures Derived from Single Source Precursor. Journal of Nanoscience and Nanotechnology , 18 (11) pp. 7405-7413. 10.1166/jnn.2018.16038.

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Abstract

This article presents a facile synthesis of cadmium sulfide nanorods (CdS-NR) and nanospheres (CdS-NS) using cadmium(II) dithiocarbamate as a precursor in the presence of two different thermalizing solvents {ethylenediamine (en) and octylamine (OA)}. The as-synthesized CdS-NR and CdS-NS were characterized by powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), selected area electron diffraction technique (SAED), fourier transmission infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDS), UV-visible spectroscopy, steady-state and time resolved photoluminesce (PL). TEM analysis has confirmed the formation of nanorods and nanospheres in the presence of en and OA, respectively. The in situ generated different capping ligands, as confirmed by FT-IR analysis, may be responsible for variation in morphology. The XRD results revealed hexagonal (nanorods) and cubic mixed hexagonal phase (nanospheres). Owing to band gapes (UV-Vis) in the visible region, both these nanostructures (nanorods and nanospheres) were tested as a solar light drive photocatalyst for the degradation of Congo red (CR). The results indicated that CdS-NR exhibit better catalytic efficiency (K app = 0.366 min−1) toward CR degradation as compared to CdS-NS (K app = 0.299 min−1) The better photocatalytic activity of nanorods can be attributed to the anisotropically grown structure which infers longer electron hole recombination time as revealed by the time resolved PL.

Type: Article
Title: Efficient Solar Light Driven Photocatalytic Degradation of Congo Red Dye on CdS Nanostructures Derived from Single Source Precursor
DOI: 10.1166/jnn.2018.16038
Publisher version: https://doi.org/10.1166/jnn.2018.16038
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: CdS; Mechanism; Nanorods; Nanospheres; Photocatalysis
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10085364
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