Bulletin of Materials Science

, 41:163 | Cite as

Exfoliated \(\hbox {WS}_{2}\) nanosheets: optical, photocatalytic and nitrogen-adsorption/desorption characteristics

  • S J Hazarika
  • D MohantaEmail author


In this work, we report on structural, optical, photocatalytic and nitrogen adsorption–desorption characteristics of \(\hbox {WS}_{2 }\) nanosheets developed via a hydrothermal route. X-ray diffraction (XRD) studies have revealed a hexagonal crystal structure, whereas nanodimensional sheets are apparently observed in scanning and transmission electron microscopy (SEM and TEM) micrographs. As compared to the bulk counterpart, the \(\hbox {WS}_{2}\) nanosheets exhibited a clear blue shift. Through Brunauer–Emmett–Teller (BET) surface area analysis, average surface area, pore volume and pore size of the NSs were calculated as 211.5 \(\hbox {m}^{2}~\hbox {g}^{-1}\), 0.433 cc \(\hbox {g}^{-1}\) and 3.8 nm, respectively. The photocatalytic activity of the \(\hbox {WS}_{2}\) nanosheets was also examined with malachite green (MG) as the target dye under both UV and day light (visible) illumination conditions. Accordingly, a degradation efficiency as high as 67.4 and 86.6% were witnessed for an irradiation time duration of 60 min. The nano-\(\hbox {WS}_{2}\) systems have immense potential in optoelectronics, solid-lubrication and other next generation elements.


Nanosheets photocatalysis TMDC sorption process 



We acknowledge IUAC, New Delhi, for the financial support (Project: UFR-56322/2014 and 62312/2017). The initial assistance of Ms Mayuri Bora during experimental work is acknowledged. Further, we thank SAIC, Tezpur University, for extending several analytical facilities.


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Copyright information

© Indian Academy of Sciences 2018

Authors and Affiliations

  1. 1.Nanoscience and Soft Matter Laboratory, Department of PhysicsTezpur UniversityTezpurIndia

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