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One‐step green synthesis by organic molten salt method and optical properties of CdS nanosheets
Author(s) -
Zhang Jianjun
Publication year - 2012
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201100517
Subject(s) - wurtzite crystal structure , photoluminescence , cadmium sulfide , materials science , scanning electron microscope , spectroscopy , transmission electron microscopy , visible spectrum , absorption spectroscopy , energy dispersive x ray spectroscopy , molten salt , ultraviolet visible spectroscopy , ultraviolet , chemical engineering , analytical chemistry (journal) , nanotechnology , chemistry , optoelectronics , optics , organic chemistry , composite material , physics , engineering , quantum mechanics , zinc , metallurgy
Cadmium sulfide (CdS) nanosheets were synthesized by an environment friendly, “green” organic molten salt (OMS) method at 220 °C. The as‐synthesized products were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS), respectively. The XRD results reveal that the as‐synthesized CdS nanosheets are of the hexagonal wurtzite structure and the CdS nanosheets grow along the c‐axis. The SEM results indicate that the diameters and thickness of the CdS nanosheets are about 20–40 nm and 5–10 nm, respectively. The optical properties of the CdS nanosheets were investigated by ultraviolet–visible (UV‐Vis) spectroscopy and photoluminescence (PL) spectroscopy. The ultraviolet–visible spectrum exhibits two excitonic peaks with a step‐like absorption and the photoluminescence spectrum shows a green emission peak centered at around 524 nm. A possible growth mechanism of CdS nanosheets was discussed.